I have my part modeled from a machine drawing and now I want to take that part and add finish stock as well as draft. I want to do this and keep the machined part as is.
Welcome to SolidWorks forums Adam.
General flow/process is to make cast/raw part first and then convert that into a machined part. In your case it's other way round. You can use configurations (two configurations in same part) or multi body option (by inserting part into another part) and add required features)
You might also find this post helpful for your future reference
Read up on solid bodies.
I am making a couple of assumptions:
You need to document the raw material.
You need to show the material which will be removed in the machined part.
I will explain the two methods we use (allowing for clear documentation at each step):
Casting and raw material Part method
First - Create the raw material part (block or intricate shape in the case of a casting)
Second - Start a new part and use the insert - part command. Then create all the machined features.
Weldment / Assembly method
First - create your assembly to be machined
Second - create a new assembly and insert the assembly from step one. Using assembly features, insert all the features for machining.
For both of these methods we will distinctivly color all the machined features.
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