When i worked at Kennametal we did make tools ands dies from carbide that made parts for the auto makers,also we made parts for the govt.We would draw up the dies from supplied designs.The drawings usually were about 4/5 pages.You were using trig all the time to figure the angles.then the dies and rams were made.then we got them back from the die shop.Then we set them up as they were to be used then made a plastic part just like the part to be made.then this part was taked to the die shop where it was placed on the comparator with our drawing next to it.Our drawings had to be accurate.We used pencils that were sharp all the time.If there was a problem,usually polishing the die case was the answer.i remember those guys polishing and polishing those cases.Now everything is cad drawn and calculated.
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