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Hot punching forming method for automobile covering part

A technology for hot stamping forming and automobile covering parts, applied in the field of hot stamping, can solve problems such as brittle fracture of liquid metal, achieve the effects of excellent mechanical strength and speed up production efficiency

Inactive Publication Date: 2017-05-31
GUANGDONG INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a hot stamping forming method for automobile panels, which effectively solves the liquid metal brittleness caused by molten Zn contained in the coating intruding into the underlying steel plate during the heat treatment of the steel plate before hot pressing in the existing plated steel plate hot stamping forming The technical problem of fracture, and make the steel plate completely quench hardened, so that the mechanical strength of the product can be optimized

Method used

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  • Hot punching forming method for automobile covering part
  • Hot punching forming method for automobile covering part
  • Hot punching forming method for automobile covering part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] In Embodiment 1, a method for hot stamping of automobile panels is provided, see Figure 1-4 The cover part is formed by hot stamping of steel plate 1. Steel plate 1 includes steel plate body 10 and coating 11. First, before hot stamping forming of steel plate, heat absorbing layer 12 is sprayed on the surface of steel plate 1, and heat absorbing layer 12 evenly covers the coating 11. . Specific steps are as follows:

[0043] (1) Steel coil uncoiling: The steel coil with coating is hoisted on the uncoiler by driving, the uncoiling motor is started, and the steel coil is uncoiled. After the steel coil is uncoiled, the steel strip enters the cleaning station and straightening station, and then passes Send the roller into the spraying heat absorbing layer area;

[0044] (2) Spray heat-absorbing layer: The uncoiled, cleaned and straightened steel strip is conveyed to the spraying station through the pinch roller. The heating section heats the steel strip to 45°C. Next, t...

Embodiment 2

[0052] In the second embodiment, a method for hot stamping of automobile panels is provided, see Figure 1-4 The cover part is formed by hot stamping of steel plate 1. Steel plate 1 includes steel plate body 10 and coating 11. First, before hot stamping forming of steel plate, heat absorbing layer 12 is sprayed on the surface of steel plate 1, and heat absorbing layer 12 evenly covers the coating 11. . Specific steps are as follows:

[0053] (1) Steel coil uncoiling: The steel coil with coating is hoisted on the uncoiler by driving, the uncoiling motor is started, and the steel coil is uncoiled. After the steel coil is uncoiled, the steel strip enters the cleaning station and straightening station, and then passes Send the roller into the spraying heat absorbing layer area;

[0054] (2) Spray heat-absorbing layer: The uncoiled, cleaned and straightened steel strip is conveyed to the spraying station through the pinch roller. The heating section heats the steel strip to 50°C...

Embodiment 3

[0062] In the third embodiment, a method for hot stamping forming of automobile panels is provided, see Figure 1-4 The cover part is formed by hot stamping of steel plate 1. Steel plate 1 includes steel plate body 10 and coating 11. First, before hot stamping forming of steel plate, heat absorbing layer 12 is sprayed on the surface of steel plate 1, and heat absorbing layer 12 evenly covers the coating 11. . Specific steps are as follows:

[0063] (1) Steel coil uncoiling: The steel coil with coating is hoisted on the uncoiler by driving, the uncoiling motor is started, and the steel coil is uncoiled. After the steel coil is uncoiled, the steel strip enters the cleaning station and straightening station, and then passes Send the roller into the spraying heat absorbing layer area;

[0064] (2) Spray heat-absorbing layer: The uncoiled, cleaned and straightened steel strip is conveyed to the spraying station through the pinch roller. The heating section heats the steel strip ...

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Abstract

The invention provides a hot punching forming method for an automobile covering part. The covering part is formed through hot punching of a steel plate. The steel plate comprises a steel plate body and a plating. Before hot punching forming of the steel plate, a heat absorbing layer is sprayed to the surface of the steel plate and evenly covers the plating. The method for hot punching forming of the automobile covering part comprises the following core steps that firstly, a steel roll is unrolled; secondly, the heat absorbing layer is sprayed, and a heat absorbing material is bonded to the surface of a steel belt so as to form the heat absorbing layer; thirdly, a slab is punched; fourthly, heating punching is conducted, and the slab is subjected to hot punching forming into the shape of the covering part; and fifthly, pressure maintaining quenching is conducted. The technical problem that during heating treatment of the steel plate before hot pressing in existing plated steel plate hot punching forming, melted Zn contained in the plating invades into a bottom-layer steel plate, and consequently brittle fractures of liquid metal are caused is effectively solved, meanwhile, the steel plate is completely quenched and hardened, and the mechanical strength of the covering part product is optimal.

Description

technical field [0001] The invention relates to the technical field of hot stamping, in particular to a hot stamping forming method for an automobile cover. Background technique [0002] Hot stamping technology was first proposed by Plannja Hard Tech in Sweden in 1977, and was first applied to the production of auto parts in Sweden in 1984. After more than 20 years of development, the annual output of hot stamping body parts has reached 150 million pieces. The hot stamping process includes multi-disciplinary and multi-field knowledge, and the research is very difficult. At present, there are mainly European Thyssen-Krupp Steel Company, Benteler Automobile Company, Arcelor Automotive Research Center, American Society of Mechanical Engineers (ASME), Daimler-Chrysler Company , Shanghai Baosteel, China Tongji University and other enterprises and scientific research institutes have carried out related research work. [0003] The hot stamping forming process refers to: first heat...

Claims

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Application Information

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IPC IPC(8): B21D22/02B21D37/16B21D35/00B05D1/02B05D3/02C21D1/62
CPCB05D1/02B05D3/0209B05D3/0218B05D3/0254B21D22/022B21D35/002B21D37/16C21D1/62
Inventor 张凤杰詹春毅
Owner GUANGDONG INST OF SCI & TECH
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