An Additive Machining Forming Method for Complex Parts and Molds

Abstract

The invention discloses a method for additive processing and forming suitable for complex parts and molds, comprising the following steps: establishing a CAD geometric model of a part or a mold, extracting an STL model, and dividing the STL model into multiple layers with a preset layer thickness ; Separately extract the inner and outer contour points of multiple layers to form inner and outer contour trajectories, and generate numerical control instructions corresponding to each layer of processing based on the inner and outer contour trajectories; select the sheet material with the thickness of each layer as the processing object of each layer, and pass through the cutting device According to the CNC instructions corresponding to the processing of each layer, each layer of sheet material is cut; each layer is stacked according to the order of arrangement to obtain a blank or a blank, and each layer is accurately positioned during stacking, and then the The preforms are vacuum diffusion connected or the preforms are vacuum diffusion connected first, then stacked and finally vacuum diffusion connected. The invention has the advantages of high forming efficiency, high forming precision, low material cost, good forming stability and the like.

Description

technical field [0001] The invention belongs to the technical field of additive forming, and more specifically relates to an additive processing forming method suitable for complex parts and molds. Background technique [0002] Additive Manufacturing (AM, also known as 3D printing, rapid prototyping) technology originated in the late 1980s. Due to its unique principle and technological advantages, it has been verified from plastics, From the rapid prototyping technology of non-metallic prototypes such as paraffin and paper, to the rapid manufacturing technology of directly or indirectly preparing various molds, and then to the current rapid manufacturing technology of metal parts or molds, AM technology has achieved rapid development and practical application. The existing metal additive manufacturing methods mainly include fusion additive forming methods based on high-energy beams to melt powder and wire, and solid-state additive forming methods based on other energies. ...

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcomings and / or improvement needs of the prior art, the present invention provides an additive processing forming method suitable for complex parts and molds, wherein according to the internal and external contour characteristics of the complex parts or the mold itself, a layered approach is adopted to gradually The precise processing of the inner and outer contours of the sheet is completed layer by layer, and it is especially able to perform stacking of each layer after the precise processing, and then position layer by layer, and finally complete the diffusion connection of each layer of sheet material in the form of overall diffusion connection, and the corresponding It can realize the processing and molding of parts and molds with complex internal and external contours, and can overcome the defects of poor process stability, mechanical performance decline and cumbersome process of the overall parts prepared by the existing forming process, and has high forming precision, high forming efficiency and low material cost. Low, high forming strength, good stability of forming process, etc.

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