Laser-cladding repairing method of mold with snakeskin grains

A technology of laser cladding and repair method, applied in the direction of metal material coating process, coating and other directions, can solve the problems such as the inability to guarantee the smooth transition of the snake skin pattern on the surface of the mold, the insufficient bonding strength of the repair surface, and the easy occurrence of undercuts. Good economic benefits, small deformation, uniform hardness distribution

Inactive Publication Date: 2012-05-23
SHENYANG SIASUN ROBOT & AUTOMATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the heat input of arc surfacing welding is large, the mold deformation is large, and undercutting is easy to occur on the edge of the repaired edge during cold welding repair. The bonding strength of the repaired surface by thermal spraying method is insufficient, and it is easy to fall off during use. These methods cannot guarantee the surface of the mold Full, smooth transition of snakeskin pattern

Method used

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  • Laser-cladding repairing method of mold with snakeskin grains
  • Laser-cladding repairing method of mold with snakeskin grains

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: as figure 1 , figure 2 As shown, the steering wheel mold 5 to be repaired in this example is point wear, and the laser uses CO 2 Laser, the specific repair steps are as follows:

[0019] 1. Fix the steering wheel mold 5 on the workbench 4, polish off the oxide layer on the surface of the worn point 6 with electric friction, and trim it into a regular round hole shape, and clean the surface with acetone;

[0020] 2. Input the wire 3 for cladding to the top of the small hole in advance, determine the length of the wire 3, adjust the position of the laser focusing head 1, adjust the size of the spot and the center of the spot is located at the center of the hole;

[0021] 3. Set the process parameters: laser power P=4KW, spot diameter D=3mm, laser action time T=1s.

[0022] 4. Open the laser shutter for cladding. After the cladding area is cooled, spray the colorant to check whether there is any defect, grind it to the reserved size, and generate snakeski...

Embodiment 2

[0023] Embodiment 2: as figure 1 , 2 As shown, the steering wheel mold 5 to be repaired in this example is line wear, and the laser uses a fiber laser. The specific repair steps are as follows:

[0024] 1. Fix the steering wheel mold 5 on the workbench 4, polish off the oxide layer on the surface of the worn part 7 with an electric motor, and trim it into a regular straight line shape, and clean the surface with acetone;

[0025] 2. Measure the length of the scanning line, set the start and end points of the scan, compile the machine tool program, and carry out cladding by synchronous wire feeding;

[0026] 3. Set the process parameters: laser power P=3KW, spot diameter D=2mm, scanning speed 100mm / min, wire feeding 3 speed 100mm / min;

[0027] 4. Adjust the position of the laser focusing head 1, open the program for cladding, and for a relatively large repair area, it can be cladding with multiple laps, and the lap rate is about 40%;

[0028] 5. After the cladding area is co...

Embodiment 3

[0029] Embodiment 3: as figure 1 , 2 As shown, the mold 2 to be repaired in this example has both a little wear and thread wear. The laser uses a YAG laser. The specific repair steps are as follows:

[0030] 1. Fix the mold 2 on the workbench, polish the oxide layer on the surface of the worn part of the mold 2, and trim it into a regular geometric shape, and clean the area to be clad with acetone;

[0031] 2. Write the machine tool program according to the cladding position, set the process parameters: laser power is 2-4kw, scanning speed is 80-200mm / min, spot diameter is 1-3mm, start the laser and cladding material is used for cladding;

[0032] 3. After cooling, check whether there are any crack defects by coloring, and smooth the cladding layer after passing the test;

[0033] 4. Regenerate the serpentine skin on the surface of the ground cladding layer.

[0034] The laser described in the present invention is semiconductor laser, fiber laser, YAG laser or CO 2 laser. ...

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Abstract

The invention relates to a laser-cladding repairing method of a mold with snakeskin grains. The laser-cladding repairing method comprises the following steps of: fixing the mold on a worktable, polishing an oxide layer on the surface of an abraded place of the mold, finishing the oxide layer to form regular geometric shapes and washing a region to be cladded with acetone; compiling a machine tool program according to the cladded position, setting process parameters, staring a laser and carrying out cladding by using a cladding material; cooling and then carrying out dyeing inspection to judge whether a crack defect exists and polishing the cladding layer after judging that the product is qualified; and regenerating snakeskin grains on the surface of the polished cladded layer. According to the laser-cladding repairing method disclosed by the invention, a wire material which is similar to a material of the mold is selected to be used as the cladding material to ensure that the hardness of the cladded region and the hardness of an uncladded region are uniformly distributed, and the generated snake effects of the cladded region and the uncladded region are the same. The mold has little deformation after being subjected to laser-cladding, no sputter generates in the cladding process, snake grains in other regions are not affected, and the thickness of the cladded layer can be well controlled by filling a damaged region with the laser-cladding wire material. The laser-cladding repairing method disclosed by the invention has the advantages of prolonging the service life of the mold and reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of laser cladding repair, in particular to a laser cladding repair method with a snakeskin pattern mold. technical background [0002] Laser cladding technology is a new and rapidly developing technology. Under the irradiation of high-energy-density laser beams, a thin layer on the surface of the substrate and materials (alloy powder, wire, and sheet materials) added as needed are simultaneously melted. Forming a surface melting layer with a thickness of 10-1000 μm, rapid solidification to meet a special performance requirement, is a new cross-disciplinary discipline that integrates laser heating and melting, element diffusion in the molten pool, phase change and rapid solidification molding. One of the techniques used in the foreground. Using this technology, surface strengthening layers with various special properties such as wear resistance, corrosion resistance, high temperature resistance, oxidation re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C24/10
Inventor 徐国建张翼飞邢飞殷德洋于恩洪
Owner SHENYANG SIASUN ROBOT & AUTOMATION
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