Has anyone been able to find a simple way to add bend relief cutlines in a part that uses the sheetmetal component? I have a simple pan that I want to cut reliefs in to make it easier to bend but cannot seem to figure it out because the body is folded, when you go to flat pattern you cannot extrude those lines. I am using the flange tool to create the sides so when I look at @TinWhisperer 's video or others I have found they don’t apply precisely.
AAhhh I was just coming back to upload a fusion drawing that I essentially stumble into that solution sort of… I can extrude the slots but not the lines. I suspect because the lines are not part of the body. This file has slots but I had to guess on where to place them. I see two line, in the flat pattern there’s the extents and the bend for a total of 3. How are you getting the bend line in the unfold?
Ya I can do that, it looks like your slots for in between the extends? is there a way to have it cut the slot in one pass though when it’s the same size or less than the kerf? That’s why I was trying to do it with a line…
I would love if you did a video on this! This is something I want to learn. I know it’s a little clunky but till now what I have done is draw it up. Then save out a second sketch and do all the cam for the bend lines in a separate file . Then extrude the first file and do the cam for the body.
After posting the g code I cut the bend line file first then the body.
I watched your videos on projecting lines earlier today and am going to try these methods next time.
So I worked on this some more since this thread. Since we had this discussion I was always using the slot tool in F360 to create the bend relief as I have yet to figure out how to extrude a line (don’t think it’s possible). It’s not the ultimate solution though as the the torch runs over the area twice.
Yesterday I found a solution that is better and I think @TinWhisperer was illuding to it earlier in the thread but I was too dense to get it.
Simply add the lines via a sketch on the flat pattern. You can then select those as contours in the CAM workspace. I have yet to cut the piece but it seems to work fine in simulation.
I find that a single line( except in only the thinnest of materials) is too narrow for bend relief. For myself when making a relief on 14 gauge to bend at 90° a single line kerf width is too narrow so the material will crash before it bends 90deg.
@Erock89x had this interesting twist on making the slots for bending. In this demonstration, there is some information that is not viewable such as him inputting values in menu boxes but you get the gest of it. Basically, he makes the extruded flange in sheet metal then cuts a slot with extrusion in the flat pattern.
Just had a call with Autodesk support regarding these bend line relief cuts. The ways we are doing it were all this person knew to do. He did say he would put in an improvement request to add it to the sheetmetal tools though
Im glad i’m not the only one looking for a more simple route, however this is the easiest way ive found thus far.
ive gotten alot faster at it.
dont forget to turn off lead in/lead out and pierce offset if you are using thin gauge metal.
most of my releif cuts get welded back up anyway.
A good rule of thumb is a slot equal to or greater than the material thickness. You could go the entire bend allowance like @Erock89x example and you’re super safe…
The actual amount sits a little bit less than material thickness I’ll see if I can find the math I worked up for it at one time.
This picture illustrates where the problem comes in. At the inner Bend we’re dealing with compression everywhere from the neutral line to the inside radius (the neutral line offset) of the bend and we need to not have material there so we don’t crash.