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Laser repairing technology of high-hardness automobile die

A technology for automobile mold and laser repair, which is applied in the coating process and coating of metal materials, can solve the problems of the hardness of the cladding layer not meeting the requirements, the quality instability of the cladding layer, etc., and achieve the effect of improving the hardness

Inactive Publication Date: 2017-04-26
JIANGSU YUYAN MOLD IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the laser cladding technology has the defect of instability of the quality of the cladding layer, which makes the hardness of the cladding layer not meet the requirements.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A high-hardness laser repair process for automobile molds, the main steps of which are as follows:

[0022] (1) To pre-treat the surface of the mold, usually first use fine sandpaper to polish the damaged mold surface, and clean the repaired surface with ethanol; then dry the mold surface stains with acetylene oxygen flame;

[0023] (2) Heat treatment: Heat the mold to 200°C and keep it warm for half an hour;

[0024] (3) Laser cladding inner alloy powder is used; laser cladding process parameters are: laser power 3kW, cladding speed 4mm / s, preset thickness 1mm, protective gas is argon, spot mode is rectangular spot, spot size 10mm×1mm, using the preset powder feeding method; the powder feeding amount is 15g / min;

[0025] (4) After the temperature is cooled to 600°C, the middle layer alloy powder is clad by laser; the laser power is 2.5kW, the cladding speed is 3mm / s, the preset thickness is 1mm, the protective gas is argon, and the spot mode is rectangular spot. The ...

Embodiment 2

[0033] (1) To pre-treat the surface of the mold, usually first use fine sandpaper to polish the damaged mold surface, and clean the repaired surface with ethanol; then dry the mold surface stains with acetylene oxygen flame;

[0034] (2) Heat treatment: Heat the mold to 220°C2 and keep it warm for 35 minutes;

[0035] (3) Laser cladding inner alloy powder is used; laser cladding process parameters are: laser power 4kW, cladding speed 4mm / s, preset thickness 1.2mm, protective gas is argon, spot mode is rectangular spot, spot The size is 10mm×1mm, and the preset powder feeding method is adopted; the powder feeding amount is 18g / min;

[0036] (4) After the temperature is cooled to 700°C, the middle layer alloy powder is clad by laser; the laser power is 3kW, the cladding speed is 3.5mm / s, the preset thickness is 1.4mm, the protective gas is argon, and the spot mode is a rectangular spot. The spot size is 15mm×1.5mm, and the preset powder feeding method is adopted; the powder fee...

Embodiment 3

[0044] (1) To pre-treat the surface of the mold, usually first use fine sandpaper to polish the damaged mold surface, and clean the repaired surface with ethanol; then dry the mold surface stains with acetylene oxygen flame;

[0045] (2) Heat treatment: Heat the mold to 250°C and keep it warm for 40 minutes;

[0046] (3) Laser cladding inner layer alloy powder is used; laser cladding process parameters are: laser power 5kW, cladding speed 5mm / s, preset thickness 1.5mm, protective gas is argon, spot mode is rectangular spot, spot The size is 10mm×1mm, and the preset powder feeding method is adopted; the powder feeding amount is 20g / min;

[0047] (4) After the temperature is cooled to 800°C, the middle layer alloy powder is clad by laser; the laser power is 3.5kW, the cladding speed is 4mm / s, the preset thickness is 1.5mm, the protective gas is argon, and the spot mode is a rectangular spot. The spot size is 15mm×1.5mm, and the preset powder feeding method is adopted; the powder ...

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PUM

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Abstract

The invention discloses a laser repairing technology of a high-hardness automobile die. The laser repairing technology comprises the following steps: (1) preprocessing the die surface, namely, grinding and polishing the damaged die surface through fine sandpaper, and cleaning the repairing surface with ethyl alcohol; and then drying the stains on the die surface through acetylene-oxygen flame; (2) thermal processing, namely, thermally processing the die, and heating until the temperature is more than 200 DEG C, and maintaining the temperature for more than half an hour; (3) laser-cladding alloy powder in an inner layer; (4) laser-cladding the alloy powder in a middle layer after the temperature decreases to be 600 to 800 DEG C; (5) laser-cladding alloy powder in an outer layer after the temperature decreases to be 300 to 500 DEG C; and (6) cooling until the temperature reaches the room temperature, and cleaning the die with a cleaning agent. With the adoption of the laser repairing technology of the high-hardness automobile die, the defects, caused by extremely fast heating and cooling and big temperature change, in cladding layers under traditional laser cladding, can be avoided; the hardness of the cladding layers can be improved.

Description

technical field [0001] The invention relates to the field of automobile molds, in particular to a high-hardness laser repair process for automobile molds. Background technique [0002] Automobile molds are the general term for molds for punching automobile body stamping parts, including stamping molds, injection molds, forging molds, casting wax molds, glass molds, etc. The most important part of the automobile mold is the cover mold. This type of mold is mainly a cold stamping mold. [0003] The stamping parts on the automobile body are roughly divided into cover parts, beam frame parts and general stamping parts. The stamping parts that can clearly express the image characteristics of the car are the car cover parts. Therefore, a more specific automobile mold can be said to be "automobile panel stamping die". Referred to as automobile panel die. For example, front door outer panel trimming die, front door inner panel punching die, etc. For example: top cover flanging...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10C22C38/46C22C38/50C22C30/00
CPCC22C30/00C22C38/22C22C38/38C22C38/46C22C38/50C23C24/106
Inventor 孙从贵陆继忠杭霖生
Owner JIANGSU YUYAN MOLD IND