A load-balanced scanning forming method for a multi-laser SLM forming device

Abstract

The invention belongs to the technical field related to additive manufacturing, and discloses a load-balanced scanning forming method for a multi-laser SLM forming device, including: (a) constructing a corresponding three-dimensional model for a component to be processed, and Perform layered slicing and discrete processing on the model, thereby obtaining the model profile of each discrete layer; (b) according to a certain algorithm, find the optimal dividing line in the middle overlapping area of ​​each two adjacent galvanometer scanning areas ; (c) implement path planning and filling for each area after the optimized segmentation, thereby completing the overall load balancing scanning forming process. The invention can effectively solve the problems of low working efficiency of the galvanometer group, uneven temperature field distribution, and performance deterioration of the multi-laser overlapping area existing in the processing of current multi-laser SLM forming equipment, and has high efficiency, high quality, and easy operation Features, so it is especially suitable for various large-scale workpiece manufacturing applications with complex internal structures.

Description

technical field [0001] The invention belongs to the technical field related to additive manufacturing, and more specifically relates to a load-balanced scanning forming method for a multi-laser SLM forming device. Background technique [0002] Selective Laser Melting (SLM) is a metal rapid prototyping method, which is based on the basic idea of ​​rapid prototyping "discrete-layer-by-layer", using metal powder as the processing raw material, according to the discrete three-dimensional model of each layer The shape of the slice is scanned and formed layer by layer by laser on the substrate with powder laid flat. During the forming process, the metal powder is completely melted under the action of the laser and then cooled to complete the metallurgical combination. Due to the advantages of short processing cycle, good forming quality, and the ability to process metal components with complex shapes, it has been widely used and developed in recent years. [0003] Selective lase...

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Problems solved by technology

[0006] In view of the above deficiencies or improvement needs of the prior art, the present invention provides a load-balanced scanning forming method for a multi-laser SLM forming device, in which the geometric structure of the three-dimensional model and the performance and characteristics of the multi-laser galvanometer system are fully considered , to perform more optimized and effective segmentation of each discrete layer of the workpiece, and at the same time ensure that the workload of each laser galvanometer system on the discrete plane of the layer is basically the same; compared with the existing technology, it can effectively solve the problem of current multi-laser In the processing of SLM molding equipment, there are problems such as low working efficiency of the galvanometer group, uneven distribution of the temperature field, and performance deterioration in the multi-laser overlapping area. Large-scale workpiece manufacturing applications with internal structures

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