Tapered part punching method and combined process dimension control device

Abstract

The invention provides a tapered part punching method and a combined process dimension control device. The method is characterized by comprising the following steps: determining the dimensions of a blank according to a drawing; determining the times of extension and the diameter for each time of extension; according to the calculated tangential height position of the external fillet of n times extension and the inner wall of a conical part and the tangential height position of the external fillet of n-1 times extension and the inner wall of the conical part, based on a principle that the surface area before extension is equal to the surface area after the extension, calculating and determining the process dimensions of each extension process; designing the mold for each time of extension and the shape standard plate of first and second extension steps; controlling the process dimensions of the first extension process by using the first time extension shape standard plate; controlling the process dimensions of the second extension process by using the second time extension shape standard plate; controlling the extension step heights of subsequent processes by using a running rule, and till the step height before fine pressing forming, simply keeping the external fillet of each process steps tangent to the running rule; and forming the finished product of the tapered part by fine pressing. The tapered part is pressed by a single press.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, and relates to a stamping processing method of a conical part and a combined process size control device. Background technique [0002] Step-by-step stretching and processing of tapered parts is one of the stamping and processing tapered parts, which is to extend the blank one by one into a stepped workpiece, and then press it into a tapered shape. Usually, when processing tapered parts with stepped extension, since there is no definite calculation formula, the step height of each process is given by the craftsman based on experience each time, and when it is put into production again, it needs to be re-determined through process tests The step height dimension of each process. [0003] In actual production, when each procedure is tested to determine the step height of each procedure, usually each procedure is lined up in a production line for simultaneous production. After blankin...

AI Technical Summary

Problems solved by technology

[0004] 1. Many presses are occupied, and the utilization rate of equipment is low. If there are n steps in the process calculation, n+1 presses will be occupied;

[0005] 2. It is necessary to test the process height dimension every time the mold is put into production and installed. Since each step is a rounded corner transition, the process height dimension cannot be accurately measured by a universal energy tool. The number of tests is large, the amount of feeding is large, and the production cycle is long;

[0006] 3. When the number of presses is small and size grouping tests are required, the number of parts size groups is large, the size difference between groups is small, the amount of marking is large and cumbersome, mixed batches are prone to occur, and on-site management is difficult

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