Laser cladding forming device and laser cladding forming method of metal part

Abstract

The invention relates to a laser cladding forming device and a laser cladding forming method of a metal part. The device comprises a work bench in three-dimensional motion, a laser device, a wire feed device and a control system, wherein the wire feed device comprises a pinch roll wheel set, and the drive wheel of the pinch roll wheel set is connected with a stepping motor; the control system comprises a multi-shaft motion control card, and the multi-shaft motion control card is connected with the stepping motor, a work bench driving motor and the laser device respectively. The method comprises the steps of modeling, instruction conversion, sheet forming and deposition forming and the like. Metal wires are molten by laser to form molten drops, the molten drops are piled up and cooled on the work bench, sheets are formed along with the motion of the work bench, and all sheets are deposited layer by layer to form the three-dimensional metal part. The invention has low manufacturing cost, high forming efficiency, high part structure strength, high surface quality and wide application range.

Description

technical field [0001] The invention relates to the technical field of forming and processing of metal parts, in particular to laser cladding forming equipment and a laser cladding forming method of metal parts. Background technique [0002] Traditional metal parts forming methods include CNC machine tool cutting, casting, injection molding and so on. CNC machine tools are commonly used processing and manufacturing equipment. However, it is difficult for CNC machine tools to manufacture parts with complex surfaces or structures, such as thin-walled structures, closed inner cavity structures, and parallel cooling structures; it is also difficult to process parts of certain materials, such as titanium alloys and high-hardness materials. [0003] Rapid prototyping is a new manufacturing method that can solve the problems existing in traditional manufacturing methods. Currently, the most important rapid prototyping materials are: resin, powder, paper, wax, plastic material and...

AI Technical Summary

Problems solved by technology

Disadvantages: (1) The forming process is accompanied by physical and chemical changes, so the parts are more likely to bend and need support, (2) The cost of equipment operation and maintenance is relatively high

(4) Liquid resin has odor and toxicity, and needs to be protected from light to prevent premature polymerization, and there are limitations in selection

(5) Requires secondary curing

(6) The performance of liquid resin after assimilation is not as good as that of commonly used industrial plastics. It is generally brittle and easy to break. It is not suitable for machining. The shrinkage of the resin leads to a decrease in precision, and the photocurable resin has certain toxicity, etc.

[0007] The disadvantage of the above-mentioned technology of directly melting metal forming parts is that they all adopt the powder spreading method, so no matter which form of powder is used, the metal after laser sintering has low density, porous and low strength

To improve the strength of sintered parts, post-processing must be carried out, such as impregnating resin, low melting point metal, or hot isostatic pressing, but these post-processing will change the precision of metal parts, and the surface roughness is high, and the molding efficiency is not high.

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