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Method for electric-arc additive manufacturing of aluminum alloy multi-layer single-pass closed structural member

A kind of additive manufacturing, multi-layer single-channel technology, applied in the direction of manufacturing tools, arc welding equipment, metal processing equipment, etc., can solve the problems of low material utilization rate, prolonged production cycle, difficult mechanical processing, etc., and achieve metallurgical bonding performance Good, reduce production cost and shorten the production cycle

Active Publication Date: 2017-02-15
BEIJING HANGXING MACHINERY MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, casting technology and mechanical processing methods are mainly used for aluminum alloy products. Although traditional methods can meet the requirements of processing accuracy, they have disadvantages such as difficult mechanical processing, cumbersome and complicated procedures, low material utilization rate, high production cost, and long production cycle.
In the actual development and production, sometimes it is necessary to repeatedly design and verify the product, and the product size and structure need to be changed at any time. Using traditional processing methods will not only increase the cost significantly, but will inevitably seriously prolong the production cycle.
At the same time, due to the existence of many macroscopic defects and component segregation in cast parts, it directly affects subsequent processing such as machining and welding.
It is difficult for the existing manufacturing combination to meet the development, production and progress of new product rapid modification

Method used

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  • Method for electric-arc additive manufacturing of aluminum alloy multi-layer single-pass closed structural member
  • Method for electric-arc additive manufacturing of aluminum alloy multi-layer single-pass closed structural member

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Arc additive manufacturing of thin-walled structural parts of 5B06 aluminum alloy with straight wall and equal thickness

[0039] The specific implementation method is: welding current 95A, wire feeding speed 6m / min, stacking speed 8mm / s; welding wire diameter is ф1.2mm5B06 aluminum alloy; layer height 1.3mm, layer thickness 1.6mm, formed by stacking 200 layers of rectangular pieces; The C+P mode is selected for the three-layer bottom layer additive, and the C+P+A mode is selected for the upper additive process; the additive process uses 99.9% high-purity argon for frontal protection; the mechanical arm operates in a straight line; the arc starting point is At the midpoint of the four sides of the rectangle, every time a layer of material is added, the welding torch is raised by 1.3mm, and the arc starting point is changed to accumulate the next layer. 8mm thick aluminum alloy rectangular closed structure.

Embodiment 2

[0040] Example 2: Arc Additive Manufacturing of 5B06 Aluminum Alloy Structural Parts with Straight Walls and Unequal Thickness

[0041] This structural member is a trapezoidal straight wall structural member with three wall thicknesses in the upper, middle and lower regions and two different wall thickness transition modes. Such as figure 2 As shown, the bottom wall thickness is 12mm, the middle wall thickness is 8mm, and the upper wall thickness is 12mm.

[0042] The specific steps are:

[0043]Grind the pickled 400mm×400mm×22mm substrate flat and wipe it clean with acetone, then fix it on the workbench to ensure its level;

[0044] 99.99% high-purity argon is used for frontal protection, the gas flow rate is: 18-20L / min, and the pre-ventilation time is 5s;

[0045] Make a base buildup of the bottom three layers. The mode is C+P, the stacking method is swing stacking (frequency 7Hz, amplitude 3mm, peak dwell time 0.1s, trough dwell time 0.1s); welding current 100A, wire ...

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Abstract

The invention provides a method for electric-arc additive manufacturing of an aluminum alloy multi-layer single-pass closed structural member. The method includes the following steps that an aluminum alloy metal wire is used as a forming material, and a welding electric arc is used as a heat source to melt the aluminum alloy metal wire; and a welding device is driven by a driver to move in a predetermined forming path to form a layer of single-pass closed piece on a base plate in an accumulating mode, then the welding device is lifted by a predetermined height for accumulation of the next layer, and the aluminum alloy multi-layer single-pass closed structural member is formed by repeating the action. The predetermined forming path is a closed loop which is provided with at least two arcing points, and every two adjacent accumulated layers are different in arcing point and opposite in direction. According to the method, equipment is simple, the material utilization rate can reach 100%, the production cost is lowered, and the production cycle is shortened; and a formed part is composed of all-weld metal, and is high in density, good in metallurgical bonding performance and uniform in chemical ingredient, and the mechanical property of the formed part can reach or exceed that of a same-ingredient casting.

Description

technical field [0001] The invention belongs to the field of rapid prototyping. More specifically, the present invention relates to a method for manufacturing an aluminum alloy multilayer single-track closed structure by using arc additive materials. Background technique [0002] With the increasingly stringent requirements for the performance, precision, manufacturing cost and manufacturing cycle of dense metal parts in key technical fields such as aerospace and national defense, the use of additive manufacturing technology to directly form metal parts has become a research hotspot. Aluminum alloy materials have been widely used in the manufacture of aerospace products, which can effectively reduce product weight and improve product flight performance. At present, casting technology and mechanical processing methods are mainly used for aluminum alloy products. Although traditional methods can meet the requirements of processing accuracy, they have disadvantages such as dif...

Claims

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Application Information

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IPC IPC(8): B23K9/16B23K9/133B23K9/235
CPCB23K9/133B23K9/1336B23K9/16B23K9/235
Inventor 胡洋步贤政曲宏韬王志敏韩铁姚为
Owner BEIJING HANGXING MACHINERY MFG CO LTD
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