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Electric arc additive manufacturing method based on reverse compensation

A technology of additive manufacturing and reverse compensation, applied in additive manufacturing, additive processing, etc., can solve the problems of the size and structural accuracy of formed parts, etc., and achieve strong structural designability, active control, and reduction of welding. deformation effect

Active Publication Date: 2021-03-19
CHINA THREE GORGES UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Only rigid fixation, heat input adjustment, rolling with welding, hammering and other deformation suppression methods are feasible to a certain extent, but after the rigid fixation is removed, it is difficult to guarantee the size and structural accuracy of the original formed part, and the adjustment of heat input is performed in a multi-channel reciprocating process. During the forming process, it has little effect on the macroscopic temperature field

Method used

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  • Electric arc additive manufacturing method based on reverse compensation
  • Electric arc additive manufacturing method based on reverse compensation
  • Electric arc additive manufacturing method based on reverse compensation

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Such as Figure 1-7 As shown, a reverse compensation-based arc additive manufacturing method specifically includes the following steps:

[0037] Step 1: Establish a 3D model of the additive part, pre-process the 3D model, and then import it into the finite element analysis software for thermal coupling analysis; according to the actual process flow of the arc additive manufacturing, establish a digital model of the additive part in the 3D software The 3D model is imported into the finite element analysis software, the model is preprocessed by the finite element analysis software, the heat source subroutine is written, and the thermal-mechanical coupling analysis is performed on the 3D model to obtain the stress field, temperature field and shape after the initial additive manufacturing. variable.

[0038] Step 2: Pre-process the model and simulate it to extract the thermal stress and deformation of the substrate deposited by the interpass material;

[0039] Step 3: Im...

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Abstract

The invention discloses an electric arc additive manufacturing method based on reverse compensation. The method comprises the following steps of: manufacturing additive pieces on two sides of a substrate; dispersing and releasing residual stress on the substrate through heat input on different sides; in the two cladding deposition processes, ensuring that the deformation directions are opposite and are mutually counteracted; and in an allowable deformation range, performing reverse compensation on the residual stress on the substrate. Control over thermal stress and deformation is achieved, cladding is conducted on two sides of the substrate in a staggered mode, the front layer preheats the rear layer, the rear layer conducts post-heating on the front layer, residual stress is released, and cladding deformation is reduced.

Description

technical field [0001] The invention relates to the field of geometric precision control of additive manufacturing formed parts, in particular to a method for controlling residual thermal stress and deformation of additive manufacturing. Background technique [0002] Additive manufacturing is a metal additive manufacturing technology that uses electric arc as a forming heat source. It has the advantages of high deposition efficiency, high energy utilization rate, and low equipment cost. Medium-sized metal parts have unique advantages in low-cost, high-efficiency and rapid manufacturing. It is the metal additive manufacturing technology that is most expected to complement the advantages of laser and electron beam additive manufacturing methods. [0003] However, in the additive manufacturing process of metal parts, deformation is an important factor affecting the accuracy and mechanical properties of the formed components, affecting the automatic forming process and the final...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F10/28B22F10/85B33Y10/00B33Y50/02
CPCB33Y10/00B33Y50/02Y02P10/25
Inventor 周祥曼秦敬平王礴允傅子川田启华杜义贤付君健
Owner CHINA THREE GORGES UNIV
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