Wire Arc Additive Manufacturing Technology and Application of Aluminum Alloy Lattice Structure

ZHENG Bo; YU Shengfu; YU Runzhen; LI Yongjie; TANG Lun

doi:10.7512/j.issn.1001-2303.2023.02.08

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Wire Arc Additive Manufacturing Technology and Application of Aluminum Alloy Lattice Structure
Vol. 53, Issue 2, Pages: 87-96(2023)
Received：10 January 2023，

Published：20 February 2023
DOI： 10.7512/j.issn.1001-2303.2023.02.08
稿件说明：

移动端阅览

郑博，余圣甫，禹润缜，等.铝合金点阵结构电弧增材制造技术及应用［J］.电焊机，2023，53（2）：87-96. DOI： 10.7512/j.issn.1001-2303.2023.02.08.

ZHENG Bo, YU Shengfu, YU Runzhen, et al.Wire Arc Additive Manufacturing Technology and Application ofAluminum Alloy Lattice Structure[J].Electric Welding Machine, 2023, 53(2): 87-96. DOI： 10.7512/j.issn.1001-2303.2023.02.08.

摘要

电弧增材制造技术是制备点阵结构的有效方法。研究了点阵结构电弧增材制造装备、铝基药芯焊丝设计与制备技术、激光约束电弧工艺和点阵杆件直径、角度控制方法，制备了典型点阵结构示范件。点阵结构电弧增材制造装备由增材制造单元、激光单元与监测单元组成。设计自生Al

相铝合金药芯丝材Al-Cu-NiO合金体系，制备出直径1.2 mm的药芯丝材，堆积杆件具有较低的热导率。激光激发大量中性粒子电离，使电弧中的带电粒子大幅度增加，对电弧存在约束和稳定作用，提高成形精度。控制电弧增材制造熔滴体积与个数，可制备直径为2.5~7.0 mm的点阵单元杆件。控制电弧增材制造电弧枪纵向与横向运动量，可制备角度为15°~90°的点阵单元杆件。利用点阵结构电弧增材制造技术实现了平面点阵结构、圆柱面点阵结构和曲母线面点阵结构的高精度成形，点阵结构的平均压缩强度为58.53 MPa，具有较高的承载性能。在点阵测试件的上表面施加均匀热源，热源温度为500 ℃，时间600 s，测试件下表面温度约93 ℃，具有较高的隔热性能。

Abstract

Wire arc additive manufacturing (WAAM) is an effective method for fabricating lattice structure. The WAAM equipment of lattice structure

the design and fabrication technology of Al-based flux-cored wire

the laser constrained arc process and the diameter and angle control method of lattice rod were studied. Typical lattice structure application parts were manufactured. The WAAM equipment of lattice structure is composed of additive manufacturing unit

laser unit and monitoring unit. The Al-Cu-NiO alloy system of in-situ Al

phase Al alloy core wire was designed. The core wire with a diameter of 1.2 mm was prepared

and the deposition rod had low thermal conductivity. Laser excites a large number of neutral particles to ionize

so that the charged particles in the arc greatly increase the arc

which has a restraining and stabilizing effect on the arc and improves the forming accuracy. By controlling the volume and number of droplets in WAAM

lattice unit rods with different diameters of 2.5~7.0 mm can be manufactured. By controlling the lift and offset between the layers of the welding torch during WAAM process

lattice unit rods with different angles of 15°~90° can be prepared. The high-precision forming of planar lattice

cylindrical lattice and curved busbar lattice structures is fabricated by using the lattice structure WAAM technology. The average compressive strength of the lattice structure is 58.53 MPa. The uniform heat source is applied to the upper surface of the lattice test piece. The heat source temperature is 500 ℃. When the heat source is applied for 600 s

the lower surface temperature of the test piece is about 93 ℃

which has high bearing performance and thermal insulation performance.

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