Mold Repair Method Based on Laser Cladding Technology

A technology of laser cladding and repairing methods, applied in the direction of manufacturing tools, furnaces, heat treatment equipment, etc., to achieve the effect of repairing skin texture, excellent highlight effect, eliminating color difference and performance difference

Active Publication Date: 2019-01-11
SICHUAN CHANGHONG ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention overcomes the deficiencies of the prior art and provides a mold repair method based on laser cladding technology, which aims to effectively eliminate the color difference and performance difference caused by the different materials of the prosthesis and the base body, and reduce or eliminate the existing laser cladding. Technical problems of defects such as trachoma, inclusion spatter, and pores produced by the process

Method used

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  • Mold Repair Method Based on Laser Cladding Technology
  • Mold Repair Method Based on Laser Cladding Technology
  • Mold Repair Method Based on Laser Cladding Technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] This embodiment takes 2738 mold steel material as implementation object:

[0045] In the first step, the bevel is processed by mechanical processing, and the angle of the bevel surface is 45°. In order to facilitate laser scanning, all the waterways below the repair are removed.

[0046] The second step is to clean it with alcohol, and preheat the mold at 120°C until the temperature is uniform.

[0047] The third step is to use metal powder made of 2738 mold steel for laser cladding repair under the protection of argon gas. The scanning width is 2.3mm, and the width of the overlapping area of ​​cladding scanning is 0.1mm; after the first layer of laser cladding repair is completed, Stop feeding the metal powder, use the laser to remelt and scan the cladding layer according to the scanning path during cladding repair, and then remelt and scan along the junction of the cladding layer and the mold base. The width of the mold base to be scanned and remelted is 0.5 mm; the ...

Embodiment 2

[0052] Taking the leather pattern mold made of P20 mold steel as the implementation object, the groove is processed at the crack, and the angle of the cut surface is 60°; the mold is cleaned with acetone and preheated at 100°C; the metal powder processed with P20 material is used for Laser cladding, the cladding steps are the same as in Example 1, the difference is that the scanning width is 2.5mm, the width of the cladding overlapping area is 0.08mm, the width of the mold base to be scanned and remelted is 0.8mm, and the cladding layer is higher than the mold Base surface 1.0mm.

[0053] The mold repaired remanufactured parts obtained by the above process have high bonding strength in the repaired area, no defects such as cracks, trachomas, and spatter inclusions. The performance test indicators all meet the requirements, and the repairing engineering precision is high, and the repairing cost is low.

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Abstract

The invention discloses a mold repairing method based on a laser cladding technology. The mold repairing method based on the laser cladding technology comprises the following steps: step 1, processing a groove in a mold to be repaired according to width and depth of a crack and area of damaged and worn regions; step 2, heating the mold to be repaired, and enabling the overall temperature of the mold to be repaired to be even; step 3, under the protection of inert gas, melting powder of which ingredients are the same as ingredients of a matrix of the mold to be repaired by using a laser cladding method, filling in the groove in a scanning mode of accumulating layer by layer, after every layer is filled, carrying out scanning remelting on a cladding layer filled at this time and a junction between the cladding layer filled at this time and the matrix of the mold by using laser; step 4, carrying out medium-temperature tempering treatment on the repaired mold; and step 5, machining a repaired body. Color difference and performance difference which are caused by different materials of the repaired body and the matrix are eliminated, defects caused by an imperfect laser cladding process are reduced or eliminated, and repairing quality of the mold is improved.

Description

technical field [0001] The invention relates to the technical field of mold processing, in particular to a mold repair method based on laser cladding technology. Background technique [0002] Injection mold is a necessary tool to realize low-cost and mass production of plastic parts. It occupies a considerable proportion in the cost of plastic products and plays an important role in production. During the service process, the mold will be cracked, worn, broken and other failures due to the influence of many factors such as mold material, process conditions, and external environment. Generally speaking, the manufacturing cost of molds is relatively high, especially for textured and high-gloss molds. Therefore, the failure of molds will not only cause huge economic losses, but also affect production progress and product quality, resulting in serious consequences. [0003] Existing mold repair methods such as laser welding, argon arc welding, and laser cladding cannot meet the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/10C21D9/00
CPCC21D9/00C23C24/10C23C24/106
Inventor 潘晓勇彭德权刘勇何云锋刘佳其
Owner SICHUAN CHANGHONG ELECTRIC CO LTD
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