RU1810182C - Method for manufacturing press tool - Google Patents

Abstract

Usage: in the manufacture of stamping tools. SUMMARY OF THE INVENTION: The die hole is pretreated and a punch with a working and fixing step is mechanically obtained. The cross-sectional dimensions of the working stage of the punch are made to exceed the corresponding dimensions of the die opening. The working stage of the punch is pressed into the hole of the matrix and at the same time the allowance in the hole is removed with the punch. The relative location of the punch and matrix is fixed by marking. Final machining of the fastening part of the punch is carried out. The punch is extruded from the die. After extrusion, the punch is oxidized without hardening. 3 silt

Description

with

WITH

The invention relates to the processing of metals by pressure, in particular to the manufacture of tools for cutting-punching products.

The purpose of the invention is to increase the accuracy of the tool by ensuring that the shape and size of the punch and die are in correspondence with the quality of the products obtained by improving the cutting surface when producing flat products from the sheet.

In FIG. 1 shows a diagram of the insertion of the punch into the matrix; in FIG. 2 is a view A in FIG. 1; in FIG. 3 is a diagram of the extrusion of a punch from a matrix.

A method of manufacturing a sophisticated stamping tool in the form of a punch 1 and a matrix 2 enclosing it consists in first pre-machining, hardening and final machining of the working 3 and fastening 4 parts of the matrix 2. first, and then the preliminary machining of the working 5 and fixing 6 parts of the punch 1, while the dimensions of the working part 5 of the punch 1 are larger than the dimensions of the working part 3 of the matrix 2. Next, the punch 1 is pressed into the working part 5 to the working part 3 of the matrix 2 with deprotection allowance 7. In this position, fixed marking positional relationship of the punch 1 and die 2 vt finally treated with an attachment portion 6 of the punch 1. The punch 1 is then is extruded from the die 2 in the direction of pressing and subjected to non-oxidizing quenching.

PRI me R. In accordance with the method, a stamping tool was made in

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about

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in the form of a punch and matrices made of X12M steel for cutting-punching of petal products from tape with a thickness of 0.5 mm, which are used for the manufacture of bicycle bearings of type 876901.

The working part of the tool (both the punch and the matrix) is a star-shaped profile, the diameter of the circumscribed circle of which is 29.5 mm, the diameter of the inscribed circle is 18.3 mm. The tooth shape of the tool profile is formed by higher-order curves, while the width of the tooth at the base is 3.8 mm, at the periphery 2.1 mm.

With such nominal dimensions, the working part of the matrix is finally made, as well as its fixing part. The punch is made with preliminary machining, while the diameter of the punch mounting part is 14.7 mm, and the punch working part is made with 0.1 mm allowance in all sizes relative to the nominal dimensions of the die working part.

The punch was pressed with the working part into the working part of the matrix with the removal of an allowance of 0.1 mm in all sizes and the relative position of the punch and the matrix was marked. Then the fastening part of the punch is finally machined to a diameter of 14.0 mm and the punch is pressed out of the die in the pressing direction. Next, the punch was quenched in vacuum. As a result, we obtained a punch tool containing a punch and a die, the shape and dimensions of the working parts of which fully correspond to each other, i.e. the mutual deviations of the corresponding sizes are practically zero.

Due to the high accuracy of the mutual correspondence between the shape and size of the punch and die, petal products with high quality edges were obtained without burrs at the cutting site.

At the same time, in the separate manufacture of the punch and die according to known

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5

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Size deviation methods reach 0.08 - 0.1 mm, which reduces the quality of cut products.

Claims (1)

The claims A method of manufacturing a stamping tool for cutting-punching in the form of a punch with a complex profiled working step and a mounting step and a matrix covering the working step of the punch, including pre-processing the working hole of the die, preliminary and final processing of the surface of the punch with the formation of a working step with cross-sectional dimensions exceeding the dimensions pre-hole matrix, heat treatment of the punch, final machining of the hole matrix pu remove the allowance in it with a punch, characterized in that, in order to increase the accuracy of the tool by ensuring mutual conformity of the shape and size of the punch and the matrix and the quality of the products obtained by improving the cut surface when receiving flat products from the sheet, the surface of the punch is machined by, the working stage of the punch is made with cross-sectional dimensions exceeding the corresponding dimensions of the working hole of the matrix, while removing the allowance in the working hole of the mat the eggs in it are pressed in the punch, with its working part and in the pressed state, the relative position of the punch and the matrix is fixed by marking and final machining of the fastening part of the punch is made, then the punch is pressed out of the matrix in the direction coinciding with the direction of pressing in, the heat treatment of the punch is made by non-oxidative hardening and is carried out after pressing out. FIG. , 1810182 bJA