AutoCAD Inventor :: Unable To Add Welds After Adding Machining Features
Sep 30, 2011
If certain modelling / sketch features should be avoided under the machining feature group.
I have an assembly file containing three part files, plus a weldment feature and machining features. In the real world this sub-assembly represents two metal components welded together, of which the third (plastic) component is then inserted, and this is followed by the final machining process - adding the staggered slot (see jpeg 1).
My problem is I get an error message as soon as I try to activate editing the weldment feature group (see jpeg 2). Clicking ‘Accept’ I can then edit the current weld, but I can not add any new welds. Inventor will let me choose to place a new fillet or groove weld, and even show a preview (see jpeg 3). But on clicking ‘Ok’ or ‘Apply’ I get another error message from which it won’t let me proceed (see jpeg 4 (in my second post)).
The error messages relate to the constraints placed on the work planes used to achieve the model features (extrusions, revolutions, chamfers, etc) under the machining features group.
A couple of points; the weld(s) have to proceed the machining features so each manufacturing stage can be clearly illustrated on the drawing of the sub-assembly. And yes in this case I could remodel the assembly, but it is time consuming and regularly our customers will want the design tweaked, so having to remodel every time would be unacceptable. Thirdly, I believe the work planes are needed to constrain the sketches (see jpeg 5 (in my second post) - the work plane is constrained to the ‘red highlighted dot’ and tangent to the cylindrical face).
In the attached assembly, I would like to fill the four corners (see Figure 1) with weld to make one smooth bead around the perimeter of the end cap rather than using fillet weld to lay down four linear beads along the edges. I accomplished this with a groove weld (see Figure 2). However, problems occurred (pasted below) when I attempt to weld this piece to a surface.
Error message:
" Create Weld Feature: problems encountered while executing this command. example.iam: Errors occurred during update Fillet Weld 3: Could not build this Fillet Weld feature The attempted operation had problems trimming and discarding faces. Try with different inputs."
When I had the four original fillet weld beads, I could fillet weld this part to a surface no problem (see Figure 3). When I switched it to a groove weld to get the desired corner appearance, I get errors. I tried to mess around with the tick boxes in the groove weld dialog box to try to fix the problem but nothing worked.
Ultimately, my problem can be solved if I could simply fill the corner gaps without using the groove weld command. This would eliminate the errors associated with fillet welding over groove welds.
Let me know if the attached files do not work. This is my first time uploading an assembly and its associated part files.
Figure 1: Corner with fillet welds (need to fill that gap)
Figure 2: Corner with groove weld (gap filled)
Figure 3: Fillet welded (concave) to plate. Still need those corners filled.
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