Method for finish machining large-tolerance parts

Abstract

The invention provides a method for finish machining large-tolerance parts. A special elastic machining fixture is used. The method includes the steps that 1, according to the size of to-be-machined parts, a lateral deformation block A and a lateral deformation block B are adjusted to make the distance between the two adjacent deformation blocks be smaller than the shape size of the parts by 0.005-0.01 mm, and it is ensured that the clamping interference magnitude is not greater than 0.01 mm; 2, the center between the lateral deformation block A and the lateral deformation block B is measuredand aligned by using a machining center probe; 3, the to-be-machined parts are pressed into the position between the lateral deformation block A and the lateral deformation block B, and the axial direction of workpieces is compressed through an axial positioning device; and 4, finish machining is conducted. According to the method, the elastic machining fixture is adopted, positioning is accurate,clamping is stable, repeated correction and clamping are avoided, the same product is used permanently after being subjected to one-time centering, cutting vibration is reduced, the accuracy of the parts is improved, the professional requirements for operators are reduced, and the production efficiency is improved; and the method can be applied to machining processes such as turning, milling anddrilling of plane machining, and wide application is achieved.

Description

technical field [0001] The invention belongs to the technical field of processing, and relates to a processing fixture, in particular to a method for finishing large-tolerance parts. Background technique [0002] When high-precision parts are rough-machined in the previous process, the tolerance of the parts is relatively large, and the same parts have different dimensions. Finishing is required in the follow-up to make the finished end faces of the same parts consistent. The original method is to use a machining center to perform individual finishing on each part. For each finishing process, the parts must be centered with the help of multiple tools such as vise, end face positioning block and horizontal correction device. Both need to be re-centered, the clamping efficiency is extremely low, and the clamping is extremely unstable, and there are human errors. Contents of the invention [0003] In order to solve the above problems, the present invention provides a finish...

AI Technical Summary

Problems solved by technology

The original method is to use a machining center to perform individual finishing on each part. For each finishing, the parts must be centered with the help of multiple tools such as vise, end face positioning block and horizontal correction device. All need to be re-centered, the clamping efficiency is extremely low, and the clamping is extremely unstable, and there are human errors

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