Method for forming uniformly-variable-height component through laser

Abstract

The invention relates to a method for forming a uniformly-variable-height component through laser. According to the method, each cladding layer is segmented through normal direction layering, then, the difference value between the actual stacking height of each small segment of each layer and the ideal stacking height of the small segment is measured and calculated, the scanning speed of each small segment of the next cladding layer is corrected through calculating, and thus closed-loop control of the cladding layer height is achieved; the cladding layers with continuously variable heights can be automatically formed through the method for forming the uniformly-variable-height component through the laser, meanwhile, the width of the cladding layers is kept to be constant, the bevel step effect is eliminated, the complexity and the forming efficiency of the laser 3D forming component are improved, and the forming quality is ensured. Compared with the prior art, the uniformly-variable-height component formed through the method is high in stability and precision, a lot of earlier-stage cladding layer orthogonal tests are omitted, a large amount of time can be saved, and a large amount of cost can be reduced. The forming process is completed fully automatically, process parameters can be subjected to self adaptation and correction according to feedback data of a layer-height control sensor, and manual intervention can be avoided.

Description

technical field [0001] The invention relates to a method for laser forming uniformly heightened parts, which belongs to the field of laser cladding and 3D forming. Background technique [0002] Laser metal 3D forming technology is based on laser cladding technology and rapid prototyping technology. Generally, the laser cladding nozzle is driven by the movement mechanism, and the laser is used as the heat source to synchronously transport the metal powder / wire, which is rapidly melted on the substrate to form a molten pool and rapidly cooled to form, and after cooling, a certain width and height of the molten pool is formed with the direction of movement of the molten pool. cladding. Slice the 3D CAD model layer by layer, plan the movement path, use the above forming method to overlap the cladding layers horizontally to form a surface, and then pile up layers vertically to form a solid body. It has the advantages of no mold, short forming time, formable gradient material, u...

AI Technical Summary

Problems solved by technology

However, the pre-process experiment tasks of this method are very heavy. The process parameter model will change under different powder / wire materials and process conditions. The amount of data is huge, and it is impossible to realize the automatic accumulation process of any material and under any conditions.

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