75. Avoid Exception Specifications Summary Avoid writing exception specifications for your functions unless external circumstances force you to do so (for example, code you cannot change has already introduced them; see exceptions in this section). Discussion If

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CHAPTER 36. Configuration and Accessibility. This chapter is a potpourri of topics that will be of interest to those developers who are familiar with the practicalities of running Firebird. It first describes the architectural differences between the Firebird models

Creating Specifications QA should work collaboratively with the business side to create automated acceptance tests that represent the true specification and documented requirements of the system. Sequentially, from iteration to

Any design of a technical object is unthinkable without an accompanying package of documentation (specifications, statements, technical requirements, operating instructions, etc.). It is quite obvious that automation of the design process would be incomplete and ineffective without the presence of tools in the graphic editor that ensure rapid preparation and execution of various design documentation. After all, it is known that the share of time devoted by the designer to preparing documentation is not much less than the time spent on the design itself. By the way, today it is the functionality for preparing technical documentation that is the fundamental difference between CAD systems and other programs for three-dimensional modeling (used, for example, for design or animation).

The main document accompanying a particular product (not counting the drawing) is the specification.

Specification– this is a text document, formatted in accordance with standards in the form of a table and containing information about the composition of the product, as well as individual characteristics of its components (quantity, weight, material, dimensions, etc.). The specification is usually attached to the assembly drawing. At the same time, by the position number of an element (part) in the specification, it is easy to find it in the drawing, and by the designation, you can find a detail drawing containing a detailed, detailed image of this element. Recently, however, BOMs are increasingly being used directly with 3D assemblies.

The specification editor (or specification design module) is a special subsystem included in the KOMPAS-3D software package, designed for designing electronic specifications based on graphic or three-dimensional KOMPAS-3D documents. The BOM editor allows you to establish an associative relationship between a BOM and assembly drawing objects or assembly components. This means that each entry in the specification document can change dynamically when the attributes (designation, name) of the associated object (part document or detail drawing) change, track the deletion of the associated object, change the geometric dimensions (for standard elements), etc. etc., which saves the designer from having to search for and manually edit the required line. All this makes designing and, most importantly, editing specifications easy and fast and also eliminates errors in filling out specifications.

This chapter will look at three examples of specification construction. The first is the creation of a specification document associated with the assembly drawing of the gearbox, which we developed in the second chapter. The second example is the construction of a specification for a three-dimensional assembly of a gearbox, modeled in the third chapter. Of course, this specification is also intended to be associative. The last example, which is most often used by designers in practice, is the development of a specification for a drawing associated with a model.

When working with a specification document in KOMPAS-3D, they usually use the concept of specification object.

Specification object is a line or several text lines in a specification document that characterize (describe) one material object: part, subassembly, assembly, etc. (Fig. 4.1).

Rice. 4.1. Specification objects (highlighted by a frame)

The specification object is the basic structural unit of the specification. Just as a drawing is made up of individual graphic elements, and an assembly is made up of parts and subassemblies, a BOM is made up of BOM objects. Specification objects in the KOMPAS-3D specification development system are divided into basic and auxiliary.

In addition to the main attributes of the product (name and designations), quantity and some auxiliary information (material, zone, graphic document format), the basic object of the electronic specification may contain information about the geometry of the object. In other words, part of the geometric objects of the assembly drawing that make up the material object to which this specification object corresponds can be connected to the base object. If a separate detail drawing exists for a given material object, the drawing file can also be attached to the BOM object. For three-dimensional assemblies, everything is even simpler - the specification itself is built on the basis of the basic specification objects associated with the parts (components) of the assembly. In addition, base objects can be sorted, disabled from display within the specification table, etc.

Auxiliary specification objects cannot be sorted and are not taken into account when summing column values, placing positions, etc. Their main purpose is to enter arbitrary text into the specification table, which cannot be created using basic objects. The auxiliary object can be various comments or the line Bolts according to GOST 7798-70, which will be followed by basic objects with the names of all bolts of this GOST.

The specification object or objects are an integral part of the KOMPAS-3D system document, both graphic and three-dimensional. This means that, for example, a part document contains its own specification object inside. This object, naturally, will be basic and may contain a name and designation associated with the corresponding properties of the part. Such an object will automatically include information about its part file as the geometry of the material object being described. When such parts are inserted into an assembly, the BOM objects created in the parts are passed into the assembly. Similarly for the KOMPAS-Drawing document, which may include several specification objects. Each of these objects, in addition to graphic elements depicting a material object in the drawing, can contain a connected detailing graphic file.

All these objects can only be viewed in the so-called slave mode, which is intended for viewing and editing specification objects in the document itself. To launch this mode, use the Edit specification objects button

on the Specification toolbar (Fig. 4.2). This button is inactive if no BOM objects have been created in the document. After clicking this button, the specification window will open in subordinate mode. It is practically no different from the specification document window, however, in this window you will not be able to connect any document to the specification. In addition, in slave mode it is prohibited to print the specification.

Rice. 4.2. Panel Specification

In order to bring together all the specification objects, format them accordingly and print them, the KOMPAS-Specification document is intended. When you connect a specification document to a drawing or assembly (or vice versa), all specification objects that were previously created in them will automatically be transferred to the specification document. Then, a bidirectional associative connection is established between the KOMPAS-Specification document and the corresponding graphic or three-dimensional document - any changes made in the design document will be immediately transferred to the specification, and vice versa.

To create a specification object, use the Add specification object button

located on the Specification panel. If part of the drawing geometry was connected to the specification object, then when viewing the already generated specification, you can easily determine which element of the drawing such and such specification object belongs to. This is possible in the mode of viewing the composition of objects. If in this mode you select a line in a specification document, the composition (geometry) of the selected specification object will be highlighted in the associated drawing. This feature is extremely convenient for viewing and editing large and dense assembly drawings.

To create a BOM object for a specific object (part) in an assembly drawing, follow these steps:

1. Select in the document window the graphic primitives (segments, arcs, splines) depicting the object for which an entry in the specification is being created. Add a leader line to the selected objects, pointing to this material object in the drawing.

Note

A specification object in an assembly drawing can be created without connecting any drawing geometry to it.

2. Click the Add BOM object button. In the Select section and object type window that opens (Fig. 4.3), specify the section into which the specification object being created will be added, and also indicate the type of object (basic or auxiliary). Click the Create button.

Rice. 4.3. Selecting a specification section and object type

3. A window for editing the specification object will appear (Fig. 4.4), in which you should fill in the designation and name of the part (the position number will be assigned automatically). This window contains the title of the specification table, as well as a line that will correspond to the line of this specification object in the KOMPAS-Specification document.

Rice. 4.4. Specification object editing window

After filling out the text of the specification line, you can connect any KOMPAS system document to this specification object, for example, a detail drawing or a model (both part and assembly) of a unit. This can be done on the Documents tab of the property panel. If the document was not connected to the specification object during its creation, this can be done later, in the subordinate mode window, by highlighting the line with the corresponding entry (in this case, the Documents tab, where the connection is made, will again become available in the properties panel).

3. Repeating steps 1–3, create as many specification objects as you need for the assembly drawing.

Now let’s put all of the above into practice.

First you need to decide on the designation template for gearbox parts. Since our example is educational, it makes no sense to follow any real production requirements - they differ in almost every enterprise or educational institution. For this reason, we will accept the following format for part designation - РЦО.01.00.00.XX. RTS is an abbreviation of the phrase “single-stage cylindrical gearbox.” The next three pairs of numbers in the example have no semantic meaning. The last two digits (XX) are the unique part number in the gearbox assembly. This number must match the position number on the leader line of the assembly drawing.

Open the assembly drawing we created in Chapter. 2. When developing a specification, we will first create specification objects only for unique parts, and then for standard ones. For this reason, the numbering of positional leader lines will differ from what is currently on the drawing. However, you don’t have to worry: the KOMPAS system specification editor automatically tracks the numbering; you only need to create specification objects in the required order.

Note

Parts that are not described by standards should be considered unique. They are developed by a designer, and for each such part there must be a detail drawing according to which this part will be manufactured. In the narrow sense (in the KOMPAS-3D system), unique are parts (graphic elements of a drawing or assembly components) that were not created using application libraries and for which automatic creation of a specification object is not provided.

Copy the gearbox assembly drawing to your hard drive and open it. Select geometric objects in the drawing that represent the oil indicator stick. Don't forget to add a positional leader line to the selection group. Go to the BOM panel of the compact toolbar and create a BOM object as described above. In the list of the Select section and object type window, you must select the Parts section; the type of objects to be created is basic. In the corresponding cells of the specification object editing window, enter the designation and name of the object: РЦО.01.00.00.01 and Oil indicator wand (Fig. 4.5). Selected objects in the drawing will be automatically connected as the geometry of this specification object.

Rice. 4.5. Creating a BOM object for an assembly drawing

One by one, create specification objects for all remaining unique parts (I emphasize - unique, but not standard), each time increasing the part number in the designation by one. For example, the designation and name in the specification object for the housing part will look like РЦО.01.00.00.02, Housing, for the gearbox cover part – РЦО.01.00.00.03, Gearbox cover, etc.

Before creating each specification object, do not forget to highlight the corresponding geometry in the drawing. To do this, it is convenient to use the Select layer button on the Select toolbar, since we created almost every detail of the drawing on a separate layer.

Separately, I would like to dwell on the creation of a specification object for a gear. As you remember, for this detail in the example of Chap. 2 a detail drawing was developed. Now this document must be connected to the corresponding entry in the specification. To do this, when creating a gear part specification object, go to the Documents tab of the property panel, where you click the Add document button

In the file opening window that appears, you need to find and select the gear drawing file (in the example it was named _GEAR WHEEL.cdw), and then click the Open button. As a result, the detail drawing will be connected to the specification object, and an image of the drawing will be shown in the preview window of the Documents panel (Fig. 4.6).

Rice. 4.6. Document connected to BOM object

Having created all the specification objects for unique parts, click the Edit specification objects button on the Specification panel to view all added records in the specification window in subordinate mode (Fig. 4.7). Please note that the specification development system independently monitors and synchronizes the numbering in the specification window and the numbering of positional leader lines of the assembly drawing.

Rice. 4.7. Specification window in slave mode

Now let's move on to creating specification objects for standard (library) elements. When inserting an element from the library into a drawing, to automatically generate a specification object, simply select the Create specification object checkbox. Since in our case all the elements have already been created in the drawing, it is necessary to start editing each of them, in the library window that appears, select the Create specification object checkbox and, without changing any other parameters, re-create the graphic element.

Let's consider an example of creating specification objects for fasteners connecting the flanges of the body and the cover. Double-click on the drawing connection image, after which a dialog box will appear in front of you (see Fig. 2.119) for setting the fastener parameters. Select the Create BOM object check box and click OK. The element in the drawing will not change (since the geometric characteristics have not changed), but the process of creating three specification objects will immediately start: for the bolt, nut and washer. The system will fill in their name automatically, in accordance with the requirements of the standards (taking into account GOST and the standard size of the element), however, if necessary, you can change it manually. After confirming the creation of a specification object, you will be asked to create or specify an existing leader line for this element (Fig. 4.8). Since all the leader lines in our drawing have already been placed, click the Select existing button, and then click in the document window on the desired leader line. Numbering, as in the formation of specification objects for unique elements, will be built automatically.

Rice. 4.8. Adding a leader line to a library element

Note

The number of both standard and unique elements in the corresponding specification column is filled in manually.

Repeat these steps for the other fasteners, the screws securing the bearing caps, and the bearings themselves. View the BOM window in slave mode and ensure that entries have been added to the Standard Items section that correspond to the standard items in the gearbox.

As was said, the window for viewing specification objects in subordinate mode is not yet a full specification. However, we have everything ready to move on to working with this specification document.

Select the menu command File > New, in the window that appears, select Specification, and then click OK. An empty KOMPAS-Specification document will open, and the system menu and toolbars will take on the appearance corresponding to this type of document.

On the compact panel, make the Bill of Materials panel active and click the Manage Assembly button

The Assembly Management window will appear, allowing you to connect KOMPAS system documents (assemblies or drawings) to the current specification, as well as manage them. Click the Connect document button in the upper left corner of this window, then select and connect the gearbox assembly drawing file to the specification. All specification objects present in the gearbox assembly drawing document will be automatically added to the specification document. All you have to do is add a specification object that corresponds to the assembly drawing itself. To do this, use the Add section button

on the Specification toolbar. In the window that appears (see Figure 4.3), select the Documentation section and click the Create button. Directly in the specification window, fill in the designation (in the line that appears in the newly created section) and the name of the assembly drawing: RTSO.01.00.00 SB, Single-stage spur gearbox. On the Documents tab of the property panel, connect the assembly drawing file itself to the specification object. If you did everything correctly, in the Format column of the specification line of the Documentation section, the format of the graphic document of the assembly drawing should appear - A2.

The specification associated with the assembly drawing is ready - you can save it to your hard drive or print it.

Note

If you make any changes to the BOM or its associated drawing, you must use the Synchronize data with assembly documents button to transfer these changes to the associated document

Specification toolbar or execute the menu command Specification-Synchronize data. To commit your changes, you can simply click the Save button or choose File > Save.

On the CD included with the book, the assembly drawing files with added specification objects _REDUCTOR.cdw, as well as the specification document file Specification.spw itself, are stored in the Examples\Chapter 4 folder.

Before moving on to describing the development of a specification for a three-dimensional model (assembly) of a gearbox, it is worth demonstrating the ability to view the composition of specification objects - the main reason why this section focused on the need to connect geometry to a specification object.

Close all documents in the system except the assembly drawing file and the specification document file. Execute the main menu command Window > Mosaic vertically, after which the windows of both documents should be placed next to each other (symmetrically), occupying all the free space of the client part of the main program window. Make the specification document window active by clicking on its title. On the Specification panel, click the Show object composition button

Select any line in the specification document and you will see that in the window of the associative document KOMPAS-Drawing, the geometry associated with the specification object will immediately be highlighted - a set of primitives and a leader line (Fig. 4.9). Go through the specification lines and see for yourself how powerful and convenient the KOMPAS-3D system specification editor has.

Rice. 4.9. Viewing the composition of electronic specification objects: specification with a selected line ( on right) and a drawing with highlighted geometry ( left)

At the same time as viewing the primitives that make up the object in the assembly drawing, you can view the detail drawing associated with this specification object (of course, if there is one), and even load it.

Developing a specification for a three-dimensional assembly of the KOMPAS system is slightly different from developing a specification for an assembly drawing. In general terms, the procedure is as follows.

1. For each part from which an assembly is supposed to be made, it is necessary to create a specification object. This means that each KOMPAS-Part document must have its own subordinate specification object containing a single line describing this part.

2. Create a document > assembly and place all the parts of the modeled object in it. If, when inserting a unique part, the Create BOM objects checkbox was selected on the Properties tab of the property panel, then all BOM objects for each component will be automatically loaded into the assembly.

3. When using elements from the library, do not forget to select the Create BOM object check box. For parts or subassemblies created in the context of an assembly, directly in the editing mode, create specification objects corresponding to them: for a part - normal, for a subassembly - external.

4. The assembly document specification is generated automatically based on the component specification objects included in it. To verify this, call the specification viewing window in subordinate mode (Edit specification objects command).

Now let's move on to the practical application of the acquired knowledge.

Attention!

The specification being designed here is in no way related to the previously developed specification for the drawing, since the drawing itself is not related to the three-dimensional model (despite the fact that they depict the same object). In this regard, the numbering of positions, and therefore the designations of parts, will differ. In addition, in the three-dimensional model of the gearbox all the keys are present (there is only one in the drawing), but there is no oil drain plug. For this reason, the example described in this section should be considered as a standalone example.

Based on the first point of the instructions for creating a specification for an assembly, you first need to create specification objects separately for each part. This can be done in one of the following ways:

Manually fill in the designation and name of the specification object for each part;

First, fill in the designation and name in the properties of each part (that is, for each KOMPAS-Part document), after which, when creating a specification object, the corresponding fields will be filled in automatically.

We will use the second method, as it is more general and correct. This is explained by the fact that the name from the part properties is automatically transferred to the corresponding assembly tree node when inserting a part from a file. In addition, the name along with the designation can be transferred to the specification of the drawing associated with the assembly.

Let's consider an example of creating a specification object for the driven shaft of a gearbox.

1. Open the Driven Shaft.m3d file from the Examples\Chapter 3\Spur Gearbox folder. Anywhere in the model view window, call the context menu and select the Properties command.

2. On the Properties tab of the property panel, in the appropriate text fields, enter the designation and name of this part: РЦО.01.00.00.01 and Driven shaft. Click the Create object button on the special control panel to save the entered attributes.

3. Now select the root element in the construction tree (this is a prerequisite for automatically filling in the columns of the specification line), switch to the Specification toolbar and click the Add specification object button

In the window that appears, select the Details section and click the Create button.

4. If everything was done correctly, then the designation and name of the specification object should be filled in automatically, and on the Documents tab of the property panel, the part document itself should be connected to the specification object (Fig. 4.10). If necessary, you can edit the entry in the BOM object manually.

Rice. 4.10. Creating a BOM object for a part document

5. Click the Create object button to complete the creation of the specification object. Save and close the document.

Repeat the above steps for all gearbox parts. The increasing order of numbering in the designation can be arbitrary. In the example on the CD, the numbering corresponds to the alphabetical order of the part file names. However, I repeat, this does not matter much, since the example is educational: what is more important to us now is the principle of creating specification objects, and not their specific content.

An alternative option for filling out specification objects is to enter the name and designation manually. In this case, the linking of the detail document to this object must also be performed by the user himself.

Having created specification objects for all parts in this way, you can open the gearbox assembly (after all, we already have it, otherwise we need to assemble the assembly again). The system will issue a request to rebuild the assembly due to the fact that many parts (or more precisely, all) have changed since the last rebuild. This question should be answered in the affirmative. You can then bring up the BOM window in subordinate mode and ensure that all individual part BOM objects are collected and sorted in the assembly document.

Next, you need to create specification objects for standard (library) parts. The method for creating such objects is no different from developing a specification for an assembly drawing. You just need to call the corresponding command of the library with which such and such an element was created, and in the window that appears, check the Create specification object checkbox (Fig. 4.11).

Rice. 4.11. Dialog for setting bolt parameters with the specified creation of a specification object

To launch the corresponding library command, you can double-click on the element itself in the assembly window or execute the Edit context menu command for the element icon in the construction tree. When forming library element specification objects in an assembly, there is one feature: in the Quantity column of the specification line, the system independently indicates the number of copies of a given object in the assembly (meaning the number of copies in arrays). For this reason, it is preferable to use the second option for creating specification objects of standard elements in a ready-made assembly, namely: for each library element in the assembly tree, call the Edit command and create a specification object for it. In this case, the number of copies of this element will be calculated automatically. If you're creating an assembly from scratch, just remember to check the Create BOM object checkbox for each library item you add to the assembly, and the total will automatically increase.

Save the assembly and click the Edit BOM objects button on the BOM panel to view the contents of the BOM in the subordinate mode window (Fig. 4.12).

Rice. 4.12. Gearbox assembly specification (view window in slave mode)

All that remains is to create a full-fledged specification document.

1. Choose File > New. In the New Document window that appears, select Specification and click OK.

2. An empty KOMPAS-Specification document will open. On the compact toolbar, activate the Bill of Materials panel and click the Manage Assembly button. A dialog box of the same name will appear, allowing you to connect to the current assembly document specification. Click the Connect document button in the upper left corner of this window, then select the gearbox assembly file in the file open dialog (Fig. 4.13).

Rice. 4.13. Connecting an assembly document to a specification

3. Close the Build Management window. As a result, all specification objects from the connected assembly will be transferred to the specification document.

4. Use the Arrange positions button

Specification panel for automatic placement of items in the specification document.

5. Save the specification. The specification for the 3D gear assembly has been completed.

Since each specification object was initially associated with some geometry (for all unique parts, this is the part itself, its file), it is also possible to use the viewing mode for the composition of objects for the resulting specification. Let me remind you that in this mode, when you select a specification object in the specification window in an associated document, the geometry corresponding to the selected specification object is highlighted.

Place the assembly view window and the specification window next to each other (menu command Window > Tile vertically), make the specification window active. On the Specification panel, click the Show object composition button to enter the mode for viewing the geometry of specification objects. Now, by highlighting any line in the specification, in the assembly window you can immediately see the gearbox part that meets this entry in the specification (Fig. 4.14).

Rice. 4.14. Mode for viewing the composition of specification objects

Files of gearbox parts with changed properties (name and designation) and added specification objects are located on the CD included with the book in the folder Examples\Chapter 4\Gearbox (specification). This folder also contains the gearbox assembly file (_REDUCTOR (section).a3d), in which you can familiarize yourself with the composition of the specification in subordinate mode, as well as the file of the specification itself (Specification.spw).

In practice, most often a drawing is immediately created from a three-dimensional model, which is then designed accordingly. A specification is created for this drawing. This section will show, using an example, how exactly in this case a specification is generated in the KOMPAS system.

Let's start by opening and rebuilding the previously created assembly from the file _REDUCTOR.a3d. This assembly presents a model of a gearbox without a cutout (cutting of body parts). After the rebuild, all BOM objects for unique parts should appear in the subordinate BOM window (remember that both assembly files, both with and without a cut, refer to the same files). Add BOM objects for standard items as described in the previous example and save the assembly.

It was possible to do it a little differently: save the file of the gearbox model with a cutout (for which the specification has already been completely formed) under a different name and in this file delete the sketch of the cutout along with the cutout itself (section according to the sketch). In any case, you should end up with a complete model with a complete set of BOM objects representing the composition of the assembly.

Now you need to create an associative drawing from the three-dimensional model of the gearbox. The procedure for constructing associative drawings was described in detail in Chapter. 2, so here we will limit ourselves to only the general sequence of actions.

1. Create a KOMPAS-Drawing document, set it to A1 format and horizontal orientation.

2. Click the Free View button on the Associative Views toolbar, select the gearbox assembly model as the source and create an associative view. Set the view scale to 1:2, the orientation to Right View, and set the view anchor point closer to the upper left edge of the drawing sheet.

3. Go to the Symbols toolbar and using the Cut Line command, draw a cut line that coincides with the horizontal axis of the associative view. The gaze arrow should be directed downwards (Fig. 4.15).

Rice. 4.15. Drawing a cutting line

4. Return to the Associative Views panel and click the Section button. Click on the section line, then move the pointer down and lock the section view under the main drawing view.

This view shows a cross-section of the gearbox with a horizontal plane, and the section affects all parts (Fig. 4.16).

Rice. 4.16. Sectional view of the gearbox: all parts are dissected

However, in sectional views it is customary to depict some parts (in our case, shafts) as uncut. To indicate to the system the need not to cut a particular part, you should perform certain actions. Expand the node of the drawing construction tree that corresponds to the section view (its name is Section A–A). The child node of this tree branch is the Helical Gearbox node, which denotes the assembly with which an associative connection of this type is established. Open this knot too. Select the driven shaft element in it and execute the context menu command Do not cut (Fig. 4.17). After this, be sure to click the Rebuild button on the Standard panel.

Rice. 4.17. Specifying an element that will not be cut in a section view

The view will be rebuilt, and the driven shaft will be shown in full (Fig. 4.18).

Rice. 4.18. Sectional view of the gearbox: all parts are cut apart except the driven shaft

Advice

To display the drawing construction tree window, use the Construction Tree context menu command.

5. Using the Projection View button of the Associative Views panel, construct a side view of the drawing. To do this, after calling the command, click on the main associative view, move the pointer to the right and fix the view's anchor point. The resulting drawing should be similar to that shown in Fig. 4.19.

Rice. 4.19. Associative drawing of the gearbox

6. Save the drawing.

If you now open the specification window for this drawing in subordinate mode, you will see that without any additional actions on your part, all specification objects were loaded from the three-dimensional model, including specification objects for standard products.

Our next step, I think, is quite obvious. Create an empty KOMPAS-Specification document and connect an associative drawing of the gearbox to it (to do this, open the Assembly Management window and select the saved drawing file). The specification lines will be filled in immediately, and the numbering of positions will correspond to the numbering that was specified in the subordinate specification of the gearbox model.

Launch the object composition viewing mode (the Show object composition button on the Specification panel) and click on the object rows. As you can see, in the drawing presentation window, the image of certain gearbox parts is highlighted, and in all three projection views at once (of course, if the part is visible in all three views). And all this, mind you, without any effort on your part - the KOMPAS system did the main work on its own.

Our work is not finished yet. The drawing clearly lacks leader lines indicating positions. Moreover, simply labeling is not enough. It is desirable that when selecting a specification object in the mode of viewing the composition of objects in the graphic document window, along with the geometry, the leader line is also highlighted. This means that it is necessary to add one more graphic element - a leader line - to the geometry of the already formed associative specification objects. Fortunately, the KOMPAS-3D system specification editor also has such capabilities.

We will demonstrate adding geometric drawing objects to a specification object using an example. All other leader lines are connected to the corresponding specification objects in the same way.

1. On the compact toolbar, activate the Symbols panel. Click the Balloon Symbol button and create a leader line with balloon number 1 pointing to the driven shaft in the section view.

2. Select the constructed leader line and, without removing the selection, switch to the specification document window. In the specification, select the line (object) to whose geometry you are going to add a position designation.

3. Click the Edit object composition button

on the Specification toolbar. A dialog box will appear on the screen (Fig. 4.20), in which you should click the Add button to confirm adding the leader line to the geometry of the specification object.

Rice. 4.20. Adding Geometric Objects to a BOM Object

Add positional leader lines to the geometry of the remaining specification objects yourself (of course, you will first have to create them in the drawing). Don't worry about numbering, because when you add a leader line to geometry, its position number is automatically synchronized with the position number of the schedule object to which the leader is added.

By turning on the object composition viewing mode (Fig. 4.21), you will get a very convenient presentation of graphical data: when you select a specification line in the drawing, both the object itself and its leader line are clearly visible.

Rice. 4.21. Mode for viewing the composition of objects for an associative drawing and its specification

However, this is not the main point. The assembly drawing itself, as well as its specification, are associated with a three-dimensional model of the gearbox. This means that when you make any changes to the structure or composition of the model (be it adding or removing components, editing symbols or part names), all these changes will be automatically transferred to the drawing and specification. You can imagine how much time an engineer will save using such a model for representing engineering data - “3D model - drawing - specification”!

In the folder Examples\Chapter 4\Associative drawing (specification) of the CD included with the book there are files of the associative drawing (Drawing.cdw) and its specification (Specification.spw), and in the folder Examples\Chapter 4\Gearbox (specification) - the file three-dimensional assembly of the gearbox, from which the associative drawing was formed (_REDUCTOR.a3d).

In the latest versions of the KOMPAS-3D system, a very convenient option has appeared for copying specification objects when copying graphic elements of a drawing. To enable this function, you need to check the appropriate box in the settings window for the specification style you need. To open this dialog, select the menu command Tools > Style Libraries > Specification Styles. In the window that appears, select the required style, for example Simple specification GOST 2.106-96, and then click the Edit style button.

Another window will appear on the screen - Specification Style (Fig. 4.22). The first tab of this window contains the checkbox mentioned above – Copy specification objects when copying geometry.

Rice. 4.22. Window for enabling the function of copying specification objects

It has been added the ability for a section or block of sections of a specification to specify the same type of mark - text that will be automatically inserted before the item numbers of the section's basic objects. To set a brand, you need to go to the Sections tab of the Specification Style window, in which select one of the sections (for example, Parts) and click the Edit button. In the window that opens, you must select the Brand checkbox, and then enter the required brand in the adjacent text field (Fig. 4.23).

Rice. 4.23. Adding a brand to a specification section

In addition, it is possible to form the name of the specification on the sheet. The specification name is the text that appears above the specification when placed on a drawing sheet. The name is created using the Name command of the specification context menu located on the sheet.

In the tenth version of the KOMPAS-3D program, a very convenient function has appeared that allows you to save a specification document as an Excel file. To do this, open one of the previously generated specifications, for example for a three-dimensional model of a gearbox, and execute the menu command File > Save As. In the window that appears (Fig. 4.24), in the File type list, select Excel (*.xls) and click the Save button.

Rice. 4.24. Saving a specification document as an Excel file

As a result, all data from the document will be transferred to an Excel table (Fig. 4.25).

Rice. 4.25. Specification saved in Excel

This Excel file (Specification.xls) is located in the Examples\Chapter 4\Gearbox (Specification) folder on the CD included with the book.

This chapter is devoted to the design of specifications in the KOMPAS-3D system.

The beginning of the chapter describes how to work with the specification editor. Then, three examples of developing specifications are presented sequentially: separately for an assembly drawing, separately for a three-dimensional model, and based on an associative drawing created from a three-dimensional model. The chapter contains almost no theoretical information - the emphasis is on practical examples of specification development.

All examples are based on materials whose development is described in Chapter. 2 and 3. However, if you wish, you can use the ready-made files located on the CD included with the book.

The purpose of this chapter is to show how much the process of issuing design documentation is simplified and the amount of routine work is reduced when using associative links using the KOMPAS-3D V10 specification editor.

The chapter will be useful to everyone who in their work is faced with the creation of assembly drawings, as well as the preparation of various accompanying documentation for them.

You can create a specification as a separate document by simply typing text from the keyboard.

1. Create a type file Drawing. Expand menu Tools\Parameters\Current drawing/First sheet parameters/Design and on the right side of the dialog box click the button Choose(Fig. 7).

2. In the dialog box that appears Select a design style find the item Specification. First sheet. GOST 2.106-96 F1. and press the button OK(Fig. 8). Confirm your selection in the window Options also at the touch of a button OK. A specification form will be displayed on the screen, which can be filled out by simply typing on the keyboard.

If the specification does not fit on one sheet, then you need to perform the following steps:

1. Open the menu again Tools\Options\Current drawing.

2. Expand here Options for new sheets\Design.

3. On the right side of the dialog box, click Choose.

4. In the dialog box Select a design style find the item Specification. Last sheet. GOST 2.106-96 F1. and press the button OK.

5. In the window Options also click the button OK.

6. Expand those menus Insert\Sheet– and the second sheet will be displayed on the screen next to the first specification sheet (Fig. 9)

1. By team Insert\Sheet can be add the required number of subsequent specification sheets to the document.

2. Further filling of the specification created in this way is carried out by entering the necessary information from the keyboard (activation of the desired cell is carried out by double-clicking the mouse). At the end of the work, do not forget to click on the button on the properties panel Create object.

3.4. Creating a document type Specification

To facilitate the creation of specifications, the KOMPAS-3D system provides a special document type Specification with the standard file extension spw. The developed module allows you to significantly speed up the process of drawing up specifications and eliminate errors when filling it out.

In our case, we are considering the creation of a COMAS document Specification in manual mode. In this mode, all specification cells are filled in by typing from the keyboard.

To create a file like Specification expand the menu item File\New. In the dialog box new document select Specification and press the button OK(Figure 10).

A specification table will appear on the screen (Fig. 11). System interface in the mode of creating a document type Specification, in addition to elements common to the system, contains its own specific menu items and toolbar.

On the panel View buttons appeared (Fig. 12):

· Scale by sheet height– to place the specification in the document window at full height;

· Scale by sheet width– to place the specification in the document window at full width;

· Normal mode– to display the specification, in which the frame and main inscription are not shown;

· Page layout– on the contrary, turns on the display mode with a frame and main inscription.

The manual method of filling out the specification is performed in normal mode, and filling out the title block is performed in the mode Page layout.

On the panel Current state new buttons also appeared (Fig. 13):

· Current page − a field that displays the number of the active page (to go to another page, enter its number and press the ˂Enter˃ key);

· Place positions - turns on and off the ability to place positions;

· Connect geometry – connects drawing geometry to specification items;

· Automatic sorting positions;

· Number of backup lines– displays the number of spare rows in the current partition.

The compact panel (on the left side of the screen) in the BOM creation mode consists of three radio buttons and a toolbar. Each of the radio buttons opens its own toolbar:

· Specification(Fig. 14);

· Formatting(Fig. 15);

· Inserting into text(Fig. 16);

Commands located on pages Formatting And Inserting into text, practically coincide with similar commands for entering text inscriptions when creating a drawing in KOMPAS-Graph.

Save the specification. It is logical if the name of the document is the same as the name of the assembly drawing. Since the specification and assembly drawing have different extensions, their names may be the same.

1. Open the assembly drawing for which you are creating a bill of materials. It is convenient to fill out the specification. When both the assembly drawing and the specification are visible on the screen. Activate the command Mosaic vertically from the menu Window(Fig. 17).

2. The specification is filled out in Normal mode(make sure this button on the panel is View was muted and the button Page layout – active). Activate the command Add base object On the page Specification(Fig. 18).

3. The system will display a dialog box Choose a section(Fig. 19). Start recording a specification with a section that has a component – position 1 on the assembly drawing. Most likely this will be the section Assembly units or Details, if the product does not have subassemblies.

4. It would be more correct to start filling out the specification from the section Documentation, but then the system will start adding positions from the line of this section - this is a specification object.

5. Select the desired section, for example Details, and press the button Create. Fill in the fields Format, Designation, Name for the first part. To move from one cell to another, use the ˂Tab˃ key. After entering the required information, click the button Create object.

6. Reactivate the command Add base object On the page Specification. The cursor will immediately move to the next line of the section Details. Enter the parameters of the next part, etc.

7. Select the first line of the specification and click the button Add section On the page Specification(Fig. 20).

8. In the window Select section and object type highlight Documentation and press the button Create. Move the cursor to the column Name and enter Assembly Drawing. Click the button Create object in the properties panel.

9. Sections are filled in similarly Assembly units. Standard products and etc.

10.Press the button Page layout on the panel View, and the system will go to Normal mode. Fill out the title block. The specification is ready (Fig. 21).