Create a Prismatic Rework Area
 for Reworking Corners and Channels

task target This task shows how to create operations for reworking corners and channels by making use of prismatic rework areas. The areas to be reworked are identified by means of a Rework feature.

You will first create a Pocketing operation to rough cut the part. Then, you will see how corners and channels can be quickly identified and then reworked using different operations. 
pre-requisites Open the Rework01.CATPart document, then select Machining > Prismatic Machining from the Start menu. Make the Manufacturing Program current in the specification tree.  
scenario 1. Select Pocketing .
2. Click the red Bottom in the sensitive icon then select the pocket bottom in the 3D window.
3. Select the Tool tab to specify a tool with nominal diameter = 40mm. 

You can refer to Edit the Tool of an Operation for more information.
4. Select the Macros tab to specify a Return in a Level macro with linear Approach and Retract paths of 50mm.

You can refer to Define Macros of an Operation for more information. 
5. Check the Pocketing operation by replaying the tool path in Video mode. 

You can see that the pocket is rough cut by this operation.

Close the dialog box to exit the replay mode.

Rename the operation Rough Pocketing then click OK to create it.
6. Select Prismatic Rework Area .

The Prismatic Rework Area dialog box appears. Click Load From then select the Pocketing operation that you have just created.

The Rework feature is initialized with the geometry and other characteristics of the defined operation.

You can rename this feature (for example, ReworkPocket.1).
7. Click Compute to visualize the areas to rework.

Here you can identify 6 corners and one channel to rework.
8. Select Pocketing to create an operation to machine the channel left by the first operation. 
9. Select the ReworkPocket.1 feature from the list in the Geometry tab.

The dialog box is then updated with information from the feature.

Choose Channel from the Rework Area Type list. 
10. Select the Tool tab to specify a tool with nominal diameter = 10mm. 
11. Select the Strategy tab and set the Overhang value to 100.
12. Select the Macros tab to specify:
  • an Approach macro with linear Approach path of 50mm
  • a Return in a Level macro with linear Approach and Retract paths of 50mm
  • a Retract macro with linear Retract path of 50mm.
13. Check the operation by replaying the tool path in Video mode. 

You can see that the channel is machined by this operation.
14. Rename the operation Channel Rework then click OK to create it.
15. Select Profile Contouring to create an operation to machine the corners left by the first operation. 

Select the ReworkPocket.1 feature from the list in the Geometry tab.

The dialog box is then updated with information from the feature.
16. Select the Tool tab page to specify a tool with nominal diameter = 5mm. 
17. Select the Strategy tab page and set:
  • Overhang for Rework Areas to 100
  • Distance between paths to 2mm.
18. Select the Macros tab page to specify:
  • an Approach macro with linear Approach path of 50mm
  • a Return in a Level macro with linear Approach and Retract paths of 50mm
  • a Retract macro with linear Retract path of 50mm.
19. Check the operation by replaying the tool path in Video mode. 

You can see that the corners are machined by this operation.
20. Rename the operation Corner Rework then click OK to create it.

scenario This user task illustrates the Load From capability in which the Rework feature is initialized with the geometric and other characteristics of a machining operation.

You can also set the characteristics of the Rework feature manually by means of the Prismatic Rework Area dialog box.

This capability can be used with the following type of operations:

  • Pocketing
  • Profile Contouring in Between two planes mode
  • Profile Contouring in Between two curves mode
  • Profile Contouring in Between a curve and surfaces mode.

end of task