Four Principles of Lathe Processing Sequence Arrangement

1) The principle of the reference plane of the lathe first. The surface used as a precision datum should be processed first, because the more accurate the surface of the positioning datum, the smaller the clamping error. Since the inverted outer circle of 40 is the benchmark of coaxiality, the surface of the lathe should be processed first, and then the other surfaces should be processed.

2) The principle of the lathe is rough first and then refined. The processing sequence of each surface is carried out in the order of roughing and semi-finishing_+finishing_precision processing to gradually improve the surface processing accuracy and reduce the surface roughness value.

3) The principle of the lathe first and then the second. The main working surface and assembly base surface of the part should be processed first, so that possible defects on the main surface of the blank can be found early. The secondary surface of the lathe can be interspersed and carried out after the main surface is processed to a certain degree and before the final finishing.

4) The principle of the lathe is near first and then far away. Normally, after the workpiece is clamped, the parts close to the tool post are processed first, and the parts far away from the tool post are processed later, so as to shorten the moving distance of the tool, reduce the idle travel time, and also help maintain the blank or semi-finished product. , Improve its cutting conditions. For the inner hole of the lathe part, the inner conical hole should be processed first, then the φ30mm inner hole, and finally the φ20mm inner hole.