Method for laser forming for uniformly-variable-width parts

Abstract

The invention relates to a method for laser forming for uniformly-variable-width parts, and belongs to the fields of laser cladding and 3D forming. The method for laser forming for the uniformly-variable-width parts comprises the following steps: layering and setting a single-channel path plan of each layer; segmenting a cladding layer of each layer and determining a spot diameter and a reference defocusing amount of each small segment according to the width of the cladding layer of the small segment; measuring and calculating the difference between an actual stacking height and an ideal stacking height of each small segment of each layer during a forming process; and correcting a scanning speed of the cladding layer of the next layer through calculation, thus realizing closed-loop control for a width of the cladding layer. The continuously-variable-width parts can be accurately and directly formed through adopting the method for laser forming for the uniformly-variable-width parts, formation for characteristic parts such as variable-width impellers and blades is completed, and invariable heights of the parts are kept, thus the complexity of laser 3D forming for the parts is greatly improved, and the forming efficiency is greatly increased. The method is suitable for laser synchronous powder / wire feeding cladding and 3D forming.

Description

technical field [0001] The invention relates to a method for forming uniformly widened parts by laser, 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. The 3D CAD model is layered and sliced, the movement path is planned, and the cladding layers are overlapped horizontally to form a surface using the above forming method, and then stacked layer by layer in the vertical direction to form a solid body. It has the advantages of no mold, short for...

AI Technical Summary

Problems solved by technology

However, the pre-experimental tasks are very heavy. In different powder / wire materials and different process conditions, the process parameter function model will change, the amount of data is huge, and it is difficult to achieve completely consistent contours between small segments, and it is impossible to achieve arbitrary materials and arbitrary conditions. automatic stacking process under

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