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Ability to flatten a rolled part

bryan_lagrangebryan_lagrange Member, User Group Leader Posts: 826 ✭✭✭✭✭
edited March 2017 in Community Support

Working in a sheet metal job shop we do have times where we need to get a flat for a rolled piece. Sometimes it just a radius we have to flatten or a full diameter. The goal is to get a proper flat pattern for the guys on the shop floor to work with. I need the ability to create a flat pattern for if it goes to the laser (the part has geometry to be cut in it) (laser gets a .dxf file for CAM use) or a flat bar that is rolled in to a ring ( the fabricator needs a length so that he/she does not cut too much material, saving cost).

Here is a link to the shapes I am referring to:

https://cad.onshape.com/documents/6d8dd61c55bb52c67c801026/w/70d3460e1114046d5a0674ca/e/db6f02daf81bd934801bdd4b

In the example I drew the OD with thickness but it would be nice to either just to draw the OD or ID sketch and in the dialog box set the material thickness.

For a tube cutting laser, I have used in the past, the CAM software requires a flat pattern of the pipe to program for it. You would think a 3D model would work here but for some reason CAM software like Tops400 requires a flat pattern. I found a lot of success in creating a flat pattern for this software, for straight length cuts of round, sq, and rectangle tubing/pipe, by creating a contour flange in the shape of the circle and leaving .005 degrees (or leaving a gap by the corner for sq/rec tube of .0005") of separation from the ends and setting the K factor to 1.000. 

This post is just to show there are multiple instances where you need to get a flat from the referenced shape. @NeilCooke@scott_harris what are your thoughts on this topic?

Have a great Sunday everyone

Bryan Lagrange
Twitter: @BryanLAGdesign

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