Method for machining high-precision extrusion die

Abstract

The invention discloses a method for machining a high-precision extrusion die. The extrusion die comprises a female die and a male die. Before the female die and the male die are subjected to workpiece standardization, an inward-contracting step face is machined under the surface of a workpiece, wherein the surface of the inward-contracting step face is in the shape of L, and the inward-contracting step face serves as a uniform leveling foundation of follow-up processes; the center point of the workpiece is found before machining and serves as the coordinate center of all the follow-up machining processes, and then positioning is carried out with the inward-contracting step face as the horizontal foundation to carry out machining according to uniform coordinate dimensions. Due to the adoption of the uniform leveling standard, a mold cavity and a mold core of the workpiece do not twist; due to the method that the center point of the workpiece serves as the coordinate center, the mold cavity and mold core of the workpiece will not be eccentric; in this way, the phenomena of twisting and being eccentric are avoided in the workpiece machining process, machining precision and efficiency are obviously improved, the female die and the male die can be matched with each other completely, and the rejection rate is obviously lowered.

Description

technical field [0001] The invention relates to an extrusion die processing method, in particular to a high-precision extrusion die processing method for simultaneously processing a concave die and a punch die. Background technique [0002] With the continuous update of machine tool equipment, especially the introduction of numerical control equipment, the processing technology of extrusion dies has also developed from the traditional "combined drilling" processing to today's "separate single-piece processing", that is, the concave of extrusion dies The die and the punch are respectively processed according to the technical requirements of the drawings to standardize the production and processing of the workpiece to ensure the precise positioning and dimensional accuracy of the cavity and core center, and the fitter directly performs fine-tuning assembly. [0003] The implementation of the new process of separate single-piece processing fundamentally cancels the matching of ...

AI Technical Summary

Problems solved by technology

[0004] At present, in the separate single-piece processing of extrusion dies, there is no unified standard for the alignment methods of the die and punch, and the method of manually drawing cross lines is mostly used, so it depends to a certain extent on the experience of skilled workers, and will It leads to the problems of torsion and eccentricity in the machining process of the workpiece, which leads to the reduction of machining accuracy, and the die and punch cannot be completely matched, which increases the scrap rate

[0005] In addition, in the existing separate single-piece processing process, when there are multiple cavities on the extrusion die, the method of processing cavity by cavity is adopted, so its efficiency is low, and the accuracy and consistency of each cavity are insufficient.

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