Hi folks,
I'm trying to model a 1911 pistol, and I'm having some trouble getting a few features to look right. I think part of the problem is that the drawings I'm using weren't created with CAD in mind. My current part is the hammer, and I'm having trouble with three main features: 1. The half-cock cut (detail A in the drawing), there's something wrong with the hooked notch angle, but I can't seem to find what I'm missing on the drawing. 2. The radius at the tip of the lever (where your thumb would press), mine doesn't curve properly, but I'm not sure how to draw the path for my swept cut to get the desired result. 3. The 'Alternative method to knurling' in the bottom left corner, I was going to try a pattern, but I don't think the drawing has enough information, also, I can't tell if the cuts are supposed to go straight across (parallel to the top plane, or if they're supposed to follow the curved surface). I'm hoping someone could either confirm there isn't enough information to fully model this part without extrapolating, or possibly model the part and send me the file so I can see how they tackled the problems. I've attached the drawing I'm using, and my part file. Thanks in advance!
1-, A quick check would reveal your model is not dimensionally accurate to the print. I would start by double checking all your dimensions.
This is a milspec print, everything you need should be included to complete the part.
2-, Try using straight extrudes/cuts and add your radii in afterwards so some of the more complex curves.
3-, The cuts would follow the curve and the pattern is 5 instances evenly spaced in the 10/32 dimension allowed.
It's ok to infer/assume/extrapolate as long as you meet the requirement definitions and tolerance specs.