A Turning Method Compensating for Shape Errors Applicable to Mass Production Parts

Abstract

The invention discloses a turning method suitable for part volume production and capable of offsetting shape errors. The turning method comprises the steps that (1) a first part in volume parts is subject to profile rough turning; (2) finish machining is carried out according to the theoretical profile; (3) two direction error amount, namely the finish machining error amount, of the part actual value and the final theoretical value of a detecting point is obtained; (4) a next similar part is replaced and installed, and the step (1) is executed; (5) the profile of the next part is subject to finish turning, and the finish machining error amount of the prior part is offset during finish machining; (6) the step (3) is repeatedly executed on the next similar part; and (7) each of the follow-up similar parts is treated according to the step (4) to the step (6), wherein the error compensation amount of the finish machining of the later part each time is the sum of the finish machining error amounts of all parts machined previously. By means of the method, shape errors, generated by factors of tool abrasion and the like, of parts machined in volume can be effectively reduced, and the part machining accuracy and production efficiency are improved.

Description

technical field [0001] The invention relates to the field of numerical control turning, in particular to a turning method suitable for mass-produced parts and capable of compensating shape errors. Background technique [0002] There is a problem of part clamping when processing on a lathe, that is, when the shape of the part is processed, if the tailstock top cannot be used for clamping, or when the inner hole is processed, the cutting torque will continue to decrease from the far end to the near end of the clamping point. And form the shape error of the part with large far end and small near end, this error will increase due to the increase of part length, so for large parts, this error has a great influence. At the same time, for large parts, the same piece of material has a difference of 3 to 5 HRc in the hardness value at different points, which will cause machining contour errors due to differences in hardness at different points of the contour during finishing machinin...

AI Technical Summary

Problems solved by technology

However, this technical solution is actually a milling method. Due to the large diameter of the milling cutter, it can eliminate the machining error by means of tool radius compensation. However, turning is completely different from milling and cannot be achieved through tool radius compensation. Perform calculations to compensate, the above scheme cannot be directly applied to turning processing

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