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Heat treatment method of automotive body stamping die

A heat treatment method and stamping die technology, applied in the field of heat treatment, can solve problems such as poor die surface quality, high body scrap rate, insufficient die service life and production needs, and achieve stable dimensional accuracy, small deformation and cracking tendency, and eliminate residual stress Effect

Inactive Publication Date: 2016-10-05
CHONGQING JUNZHUO MACHINERY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scrap rate of the body processed by the existing body mold is high, the surface quality of the mold is poor, and the service life of the mold is insufficient to meet the actual production needs

Method used

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Experimental program
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Embodiment Construction

[0012] The present invention will be further described below in conjunction with embodiment:

[0013] A heat treatment method for an automobile body stamping die, characterized in that it comprises the following steps:

[0014] 1) Spheroidizing annealing: Spheroidizing and annealing the processed mold, the annealing temperature is 700-750°C, and the annealing time is 8-10 hours;

[0015] 2) Oil cooling: put the annealed mold into cooling oil to cool to room temperature;

[0016] 3) Quenching: Quenching the above-mentioned air-cooled mold, immersing the mold in oil for quenching, the temperature is 800-960°C, and the time is 2-4 hours;

[0017] 4) Tempering: The temperature is 400°C, and the tempering time is 5 hours;

[0018] 5) Vibration aging treatment: pass the tempered mold through a vibration aging machine with a vibration frequency of 7-11 times per second and an exciting force of 40 MPa for stress relief treatment.

[0019] The hardness of the mold heat-treated by th...

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Abstract

The invention aims at providing a heat treatment method of an automotive body stamping die. After heat treatment is carried out on the automotive body stamping die by adopting the heat treatment method, the automotive body stamping die is good in surface quality, the rejection rate of an automotive body is low, the service life of the automotive body stamping die is prolonged, and the actual production demand can be met. The adopted technical scheme is as follows: the heat treatment method of the automotive body stamping die comprises the steps of: 1) spheroidizing and annealing: carrying out spheroidizing and annealing on the processed die, wherein the annealing temperature is 700-750 DEG C, and the annealing time is 8-10h; 2) carrying out oil cooling; cooling the die after annealing in coolant oil to room temperature; 3) quenching: quenching the die after air cooling, immersing the die in the oil for quenching, the temperature is 800-960 DEG C, and the time is 2-4 h; 4)tempering: the temperature is 400 DEG C, and the tempering time is 5 h; and 5) carrying out vibration ageing treatment: performing distressing treatment on the die after tempering by a vibration ageing machine with the vibration frequency of 7-11 times each second and exciting force of 40 MPa.

Description

technical field [0001] The invention relates to a heat treatment method, in particular to a heat treatment method for a stamping die of an automobile body. Background technique [0002] Most of the cold stamping dies are installed on the press, and the deforming force is applied to the sheet placed inside at room temperature to make it deform, so as to obtain a special special tool for product parts of a certain shape, size and performance. In order to improve the wear resistance, hardness and corrosion resistance of the working surface of the mold, heat and surface treatment technology must be adopted. As far as the car body is concerned, except for some standard parts, almost all of them are welded by sheet metal stamping parts. Since most of the stamped parts of the body are formed parts with a certain shape, and many of them are drawn parts with complex spatial shapes, the stamping die is the guarantee of the quality of the body. The scrap rate of the car body processe...

Claims

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Application Information

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IPC IPC(8): C21D1/32C21D1/18C21D10/00
CPCY02P10/20
Inventor 翁鸿钟
Owner CHONGQING JUNZHUO MACHINERY
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