Question

A conical surface will open on an automatic lathe. The workpiece is 1000 mm long and the minimum and maximum diameter at opposite ends is 150 mm and 250 mm. Automatic controls on the lathe set the rotation speed as a function of the workpiece diameter, allowing the surface speed to be kept at a constant value of 200 m / min. Feed 0.5 mm / revolution and cutting depth 4.0 mm. The rough geometry of the part has been created in this way and this process will be post-processing. a) the time required to create taper, and b) Determine the rotation speeds at the beginning and end of machining.

Answer 1