Machining method for female die with stepped holes

Abstract

The invention provides a machining method for a female die with stepped holes. The machining method includes blanking a forged piece; reserving 2-3mm of outer circle for rough turning, and reserving 1-2mm of length; quenching; blasting grit; performing rough turning; performing finish turning; performing heat treatment; performing bench work; grinding; and detecting. The machining method is adoptable to machining all female dies with the stepped holes; rivets processed by the female die with the stepped holes can meet the requirements of actual production completely, especially the accuracy requirements of the diameter of each stepped hole, the size of R1 of a stepped profile face and each stepped profile face; and the stepped holes are ground by two varieties of grinding rods, accordingly influence on small stepped holes during machining the stepped holes is avoided effectively on the premise of guaranteeing coaxiality, and the size of parts can be well guaranteed.

Description

technical field [0001] The invention relates to a processing method of a stepped hole female mold, which belongs to the technical field of mold manufacturing. Background technique [0002] Rivets of various shapes are often encountered in the field of aviation technology, and the production of rivets is mainly produced by many auxiliary tools such as female molds, male molds, and punches, and the accuracy of the above-mentioned auxiliary tools directly affects the rivets. Quality and production efficiency, so it is necessary to study the production methods of these auxiliary tools. [0003] As one of the above-mentioned auxiliary tools, the step hole die will encounter the following difficulties in the manufacturing process: (1) The step hole die is different from the previous straight hole die, not only in the shape of the step. , and there are R value and tolerance requirements; (2) The dimensional accuracy of the step holes on both sides of the profile at the step is rel...

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Problems solved by technology

[0003] As one of the above-mentioned auxiliary tools, the step hole die will encounter the following difficulties in the manufacturing process: (1) The step hole die is different from the previous straight hole die, not only in the shape of the step. , and there are R value and tolerance requirements; (2) The dimensional accuracy of the step holes located on both sides of the profile at the step is relatively high, one is the diameter d and depth e of the large step hole 1 It is difficult to control; the second is that the coaxiality of the two stepped holes is required to be within 0.025, the perpendicularity between the end face and the inner hole is within 0.03, and the parallelism is required to be within 0.02

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