A high-power laser selective melting method for 3D printing high-speed rail brake discs

Abstract

A method for high-power laser selective melting of 3D printed high-speed rail brake discs, comprising the following steps: (1) import the brake disc model into 3D printing software, and set the tilt of the brake disc model; (2) use the software on the brake disc model Add a support model between the substrate model and the support model. The support model is divided into cylindrical support model, square support model and thin-wall support model; (3) set the cylindrical support, upper thin wall, lower thin wall, outer thin wall, The size of the inner thin wall, the first middle thin wall and the second middle thin wall; (4) slice the brake disc model and all support models; (5) guide the model to the rapid prototyping manufacturing system for laser selective melting forming, (6) After the entity is taken out, it is annealed, cut and polished. The method of the invention solves the problem of forming the suspension structure of the brake disc and the deformation and cracking of the parts during the forming process, significantly improves the forming efficiency of the parts, and solves the problem of deformation and cracking that is easy to occur in the subsequent processing of the high-speed rail brake disc parts.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a method for selectively melting high-power lasers to 3D print high-speed rail brake discs. Background technique [0002] High-speed rail brake discs are key components to ensure the reliable operation of high-speed trains. There are complex ribs and heat dissipation ribs inside; traditional manufacturing methods include casting, heat treatment, precision machining, etc., and there are problems such as long production cycles and complicated processes. At the same time, the core technology is monopolized by foreign countries and has formed related technical protection; laser selective melting 3D printing, as one of the laser additive manufacturing technologies, has unique advantages in the manufacture of parts with complex cavity structures due to the powder coating method. It is a new type of industrialization technology focused on development at home a...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the "shape control" problem of laser selective melting 3D printing technology to manufacture complex components of large-scale high-speed rail brake discs, this invention provides a method for high-power laser selective melting 3D printing high-speed rail brake discs, specifically including the innovation of the brake disc model Design, and laser selective melting 3D printing 24CrNiMoRE alloy steel process and post-processing; by rotating and tilting the brake disc model at a certain angle, the problem of adding support is solved; by optimizing the design of the added support type and structure, the suspension structure of the brake disc is solved The problem of forming and controlling the deformation and cracking of the entire part; through the research of high-power laser selective melting process parameters, the manufacturing efficiency is greatly improved under the premise of ensuring good forming quality; through the post-processing process, the residual brake disc parts after forming are eliminated Stress, to solve the problem of deformation and cracking of high-speed rail brake disc parts in the subsequent processing

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