Additive manufacturing method and additive manufacturing device for aluminum alloy based on laser-double-MIG composite heat source

A composite heat source and additive manufacturing technology, used in manufacturing tools, metal processing equipment, welding equipment, etc., can solve the problems of insufficient high-speed stability, low laser energy absorption rate, etc., and achieve excellent comprehensive performance and uniform chemical composition of weldments. , the effect of high welding speed

Inactive Publication Date: 2017-02-15
GUANGDONG INST OF INTELLIGENT MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the laser is in front, the laser is located in front of the arc, and the "hot spot" formed by the laser on the workpiece is used to draw the arc, reduce the resistance of the arc ignition to prevent the drift of the arc root, and realize high-speed and stable welding of the arc, but the absorption rate of laser energy Not high; when the laser is placed behind, the laser uses the arc to preheat the workpiece and the plasma interaction between the arc and the laser heat source to increase the absorption rate of laser energy, and enhance the laser "keyhole" effect to obtain greater penetration and speed. and bridging capability, but insufficient high-speed stability when soldering

Method used

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  • Additive manufacturing method and additive manufacturing device for aluminum alloy based on laser-double-MIG composite heat source
  • Additive manufacturing method and additive manufacturing device for aluminum alloy based on laser-double-MIG composite heat source
  • Additive manufacturing method and additive manufacturing device for aluminum alloy based on laser-double-MIG composite heat source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] figure 1 It is an aluminum alloy additive manufacturing device based on a laser-double MIG composite heat source of the present invention, which includes an automatic welding robot 1, a composite heat source system 2, a video monitoring system 3, a digital control system 4, a wire feeding system 5, and a shielding gas system 6. The substrate 7 and the base 8; the compound heat source system 2 is connected with the automatic welding robot 1; the video monitoring system 3, the digital control system 4, the wire feeding system 5, the shielding gas system 6 and the automatic welding robot 1 are all set on the base 8 ; The video monitoring system 3 , the wire feeding system 5 , the shielding gas system 6 and the automatic welding robot 1 are all connected with the digital control system 4 .

[0032] The automated robot 1 includes an arm 11 and a base 12. The arm 11 includes a first arm 111 and a second arm 112. The composite heat source system 2 is installed on the first arm...

Embodiment 2

[0038] The present invention utilizes the surfacing welding aluminum alloy weldment of the aluminum alloy additive manufacturing device based on the laser-double MIG composite heat source as described above, and the steps of the aluminum alloy additive manufacturing method based on the laser-double MIG composite heat source are as follows:

[0039] Step 1: After double MIG welding DC reverse connection, equip the composite heat source system on the first arm of the automatic welding robot 1; at the same time, electrically connect the digital control system 4 to the automatic welding robot 1, and place the digital control system 4 on the At the appropriate position of the base 8; for the parts that need to be manufactured by surfacing, the programming is to formulate the running route of the automatic welding robot arm, and the automatic welding robot arm is moved to the initial position (arc starting point); the video control system and the digital control system connection;

...

Embodiment 3

[0048] In this embodiment, a circular shell with a height of 300 mm, a diameter of 200 mm, and a wall thickness of 20 mm is used for surfacing welding of the second embodiment. It is formed by surfacing welding of 200 layers of girth welds, and the height of each layer of surfacing welding is 1.5 mm. Such as image 3 and Figure 4 as shown, Figure 4 1 is the surfacing workpiece, and 2 is the substrate. In the surfacing process, except for the surfacing workpiece, other parameters are the same as in Embodiment 2, and the specific steps are as follows:

[0049] Step 1: Pre-ventilate for 5 seconds before surfacing on the carbon steel substrate. Before and after starting the MIG welding torch and the middle welding head, surfacing from the outer radial direction of the bottoming circumferential surface to the center of the circle to complete the first layer of bottoming surfacing, surfacing A layer of circular surface with a diameter of 300mm is produced.

[0050] Step 2: Aft...

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Abstract

The invention discloses an additive manufacturing device for aluminum alloy based on a laser-double-MIG composite heat source. The device comprises an automatic welding robot, a composite heat source system and a digital control system; the automatic welding robot comprises a first arm; the composite heat source system is connected with one end of the first arm and comprises a front MIG welding gun, a rear MIG welding gun and a laser welding head; the digital control system is connected with the automatic welding robot and is used for controlling the automatic welding robot to drive the composite heat source system to implement surfacing operation of additive manufacturing according to a set program; the invention also discloses an additive manufacturing method for aluminum alloy based on the laser-double-MIG composite heat source. Thus, a welded part welded by utilizing the composite heat source system is uniform in chemical ingredients and compact in structure; the digital control system is used for controlling the automatic welding robot to perform surfacing for additive manufacturing, and the overall additive manufacturing process can be precisely controlled, so higher manufacturing efficiency is realized and the welded part is better in quality.

Description

technical field [0001] The invention belongs to the technical field of rapid prototyping, and in particular relates to an aluminum alloy additive manufacturing method and device based on a laser-MIG composite heat source. Background technique [0002] Laser-MIG hybrid welding (that is, MIG welding) is a welding technology that combines the characteristics of laser welding and MIG welding. The laser and arc of laser-MIG hybrid welding are combined on the side axis, and there will be two different types of welding. Direction: laser front and laser rear. When the laser is in front, the laser is located in front of the arc, and the "hot spot" formed by the laser on the workpiece is used to draw the arc, reduce the resistance of the arc ignition to prevent the drift of the arc root, and realize high-speed and stable welding of the arc, but the absorption rate of laser energy Not high; when the laser is placed behind, the laser uses the arc to preheat the workpiece and the plasma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K28/02
CPCB23K28/02
Inventor 蒋晓明刘晓光曹力超张理赫亮
Owner GUANGDONG INST OF INTELLIGENT MFG
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