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Method for improving forming precision of synchronous powder feeding additive manufacturing

A technology of additive manufacturing and synchronous powder feeding. It is applied in the directions of additive manufacturing, additive processing, and energy efficiency improvement. It can solve problems such as stress deformation, uneven surface, slump and poor fusion, so as to improve manufacturing efficiency and improve energy efficiency. The effect of efficiency

Active Publication Date: 2019-03-29
SHENYANG AEROSPACE UNIVERSITY
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AI Technical Summary

Problems solved by technology

Existing metal powder-fed laser additive manufacturing technology has forming accuracy problems, including stress deformation, surface unevenness, edge collapse and poor fusion

Method used

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  • Method for improving forming precision of synchronous powder feeding additive manufacturing
  • Method for improving forming precision of synchronous powder feeding additive manufacturing
  • Method for improving forming precision of synchronous powder feeding additive manufacturing

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Embodiment Construction

[0052] In order to solve the problems existing in the existing technology, such as Figure 1 to Figure 14 As shown, the present invention provides a method for improving the forming accuracy of synchronous powder feeding additive manufacturing, including the following steps.

[0053] Step 1: Carry out three-dimensional modeling of the parts to be processed. In this embodiment, the flow of the method for improving the forming accuracy of synchronous powder feeding additive manufacturing is as follows figure 1 shown. Such as figure 2 As shown, the base material 3 should be fixed with a clamp 5 before the synchronous powder feeding additive manufacturing. Such as image 3 As shown, the auxiliary programming software LDMPlanner 2018 for additive manufacturing conventional structural metal parts is used to carry out three-dimensional modeling of the parts to be processed. The length of the parts is 1200mm, the width is 110mm, and the height is 50mm.

[0054] Step 2. Set the n...

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Abstract

The invention discloses a method for improving the forming precision of synchronous powder feeding additive manufacturing, and belongs to the technical field of laser additive manufacturing. The method for improving the forming precision of synchronous powder feeding additive manufacturing comprises the following steps that the number of layers of a three-dimensional model is set, the thickness mof the layers is set, the growth direction is set, a scanning path is planned, and printing parameters are set; synchronous powder feeding additive manufacturing is carried out, the data b of the distance from a molten pool to a laser range finder is acquired, and c is obtained through calculation; noise reduction treatment is carried out on the vertical distance c from the molten pool to the laser range finder; sparse treatment is carried out on the data subjected to the noise reduction treatment; a difference value between the actually measured height from the data subjected to the noise reduction and sparse treatment to a base material and the height of the theoretical height of the Nth layer; the relation between the difference value between the actually measured height of the Nth layer and the actually measured height of the N+1th layer and the thickness of the layers is compared; and whether the N+1th layer is larger than the set number of layers or not is compared. According tothe method for improving the forming precision of synchronous powder feeding additive manufacturing, the additive manufacturing forming precision can be improved, stopping and repairing times in the forming process are reduced, and the manufacturing efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of laser additive manufacturing, in particular to a method for improving the forming accuracy of synchronous powder feeding additive manufacturing. Background technique [0002] Laser additive manufacturing is an integrated technology that takes into account the requirements of precise forming and high-performance forming, which is based on alloy powder as raw material, through high-power laser in-situ metallurgy, rapid solidification and layer-by-layer accumulation. Metal powder feeding laser additive manufacturing technology is fundamentally laser cladding deposition. During the processing process, the coaxial feeding nozzle is used to synchronously transport the metal powder to the dynamic molten pool formed by laser beam irradiation to complete the melting and solidification of the metal powder. Forming, this technology is mainly used in the rapid preparation of complex metal parts and surface modificati...

Claims

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Application Information

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IPC IPC(8): B22F3/105B33Y10/00
CPCB33Y10/00B22F10/00B22F10/85B22F10/36B22F10/20Y02P10/25
Inventor 杨光邵帅钦兰云王伟赵朔王超任宇航尚纯王维
Owner SHENYANG AEROSPACE UNIVERSITY
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