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Process for reducing abrasion of hot-formed steel plate punching punch

A punching and hot forming technology, applied in the field of separation of hot-formed steel plates, can solve the problems of aggravating radial springback and not fundamentally considering radial springback, so as to reduce radial springback and reverse springback. The effect of reducing binding force and reducing wear

Inactive Publication Date: 2015-03-25
WUXI LANGXIAN LIGHTWEIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the slight wear of trimming, the severe wear of punching is mainly due to the fact that it is a closed curve, and the anti-constraint on the radial pulling force of the punch greatly aggravates the radial springback
All current punch solutions are limited to how to improve the performance of the punch material, but have not fundamentally considered how to reduce or even eliminate this radial springback

Method used

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  • Process for reducing abrasion of hot-formed steel plate punching punch
  • Process for reducing abrasion of hot-formed steel plate punching punch

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Embodiment 1: A process for reducing the wear and tear of hot-formed steel plate punching punches, the material of the workpiece: boron steel 22MnB5, thickness 1.6mm, length 400mm, width 200mm, the punched hole is a round hole with a diameter of 10mm;

[0023] The above-mentioned workpieces are specifically processed through the following steps:

[0024] The first step is to perform blanking and pre-punching processing on the workpiece before hot forming. The blanking size is 400×200mm, and the pre-punching hole diameter is 7mm;

[0025] The second step is to hot-form the workpiece;

[0026] The third step is to punch the workpiece according to the final aperture size of the workpiece.

Embodiment 2

[0027] Embodiment two: a kind of technology that reduces the wear and tear of hot-formed steel plate punching punch, workpiece is the B pillar for automobile, material: boron steel 22MnB5, material thickness 1.2mm, length 1250mm, wide 430mm, the punched hole is a round hole, The diameter is 12mm;

[0028] The above-mentioned workpieces are specifically processed through the following steps:

[0029] The first step is to perform blanking and pre-punching processing on the workpiece before hot forming. The blanking size is 400×200mm, and the pre-punching hole diameter is 8mm;

[0030] The second step is to perform thermoforming processing on the workpiece to obtain the B-pillar of the workpiece after thermoforming;

[0031] The third step is to punch the workpiece according to the final aperture size of the workpiece.

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Abstract

The invention relates to a process for reducing abrasion of a hot-formed steel plate punching punch. The process is characterized by comprising the following process steps: (1) discharging and pre-punching workpiece before hot forming, forming a pre-punching hole in the workpiece, wherein the hole diameter of the pre-punching hole is smaller than that of a workpiece processing hole; (2) hot forming the workpiece; (3) putting the workpiece on a lower die, pressing the workpiece by a pressing plate from the top, punching the workpiece by a punch and a concave die sleeve, wherein the punching position is the pre-punching hole position, so that the final hole with the required hole diameter is formed. When the hole diameter of the pre-punching hole formed in the step (1) cannot meet the hole diameter tolerance requirement, the workpiece is hot formed and pre-punched after the hot forming in the step (2); the hole diameter of the pre-punching hole is smaller than that of the workpiece processing hole; the hole diameter of the pre-punching hole is 0.5mm-5mm smaller than the hole diameter of the workpiece processing hole. By virtue of the process for reducing the abrasion of the hot-formed steel plate punching punch, the abrasion of the punch is effectively reduced under the condition that the extra cost is not increased and the production efficiency is not damaged; the service life of the punch is prolonged.

Description

technical field [0001] The invention relates to a process for reducing the wear of a hot-formed steel plate punching head, in particular to a process for punching high-strength and ultra-high-strength steel plates after heat-forming treatment, and belongs to the technical field of separation of hot-formed steel plates. Background technique [0002] High-strength steel plate has high strength, especially in the state of normalizing or normalizing plus tempering, it has high comprehensive mechanical properties. The application of high-strength steel plate is an effective means to ensure light weight and collision safety at the same time. , Power station equipment, medium and high pressure boilers, high pressure vessels, rolling stock, lifting machinery and other engineering industries are widely used. As a new thing, hot-formed steel plate is different from ordinary high-strength steel plate in its production process. The production process of hot-formed steel plate usually in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D28/26
CPCB21D28/265
Inventor 陈扬孙财李向荣杨云龙
Owner WUXI LANGXIAN LIGHTWEIGHT TECH CO LTD
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