MIG-TIG composite additive method

A technology of additive manufacturing and robotics, applied in the field of additive manufacturing, can solve the problems of different accuracy and efficiency of additive methods, low arc accuracy, uneven surface, etc., to improve accuracy and quality, improve additive accuracy, and increase The effect of material quality

Inactive Publication Date: 2019-04-16
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The accuracy and efficiency of different additive methods are different
[0004] In 2017, Wang Kehong, Qian Meixia, Zhou Qi, etc. from Nanjing University of Science and Technology applied for an invention patent with the publication number CN 108115282A. An arc-laser hybrid robot additive manufacturing system conceived an arc-laser hybrid robot additive manufacturing System; use arc as heat source to melt welding wire to add material, but the accuracy of arc is low, the surface after material addition is not smooth, and then use laser welding torch to add material to fill the defects of each layer of surface; make full use of the combination of two heat sources Complementary advantages, and finally obtain additive products with good forming quality, high precision and relatively low cost

Method used

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  • MIG-TIG composite additive method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The welding wire used by the MIG additive robot is ER130S-G high-strength steel welding wire with a diameter of 1.2mm; the TIG additive robot does not add welding wire; the substrate is a 6mm thick 304 stainless steel substrate; the shielding gas is pure argon;

[0037] Step 1: According to the size and shape of the workpiece to be formed, use CAD to build the model, and automatically generate the trajectory of the additive material by the computer;

[0038] Step 2: Turn on the power, wait for the MIG-TIG composite additive device to be ready, turn on the shielding gas, fix the substrate in the water-cooling device with a flexible fixture, clean the substrate, preheat the substrate to 100°C, and turn on the water-cooling device;

[0039] Step 3: Set the welding parameters, among which the MIG additive parameters are: wire feeding speed is 7.5mm / min, welding speed is 11mm / s, shielding gas flow rate is 20L / min; TIG additive parameters are: welding speed is 2mm / s, The weld...

Embodiment 2

[0047] The welding wire used by the MIG additive robot is ER130S-G high-strength steel welding wire with a diameter of 1.2mm; the welding wire used by the TIG additive robot is 316L stainless steel wire with a diameter of 1.2mm; the substrate is a 6mm thick 304 stainless steel substrate; the shielding gas is pure argon;

[0048] Step 1: According to the size and shape of the workpiece to be formed, use CAD to build the model, and automatically generate the trajectory of the additive material by the computer;

[0049]Step 2: Turn on the power, wait for the MIG-TIG composite additive device to be ready, turn on the shielding gas, fix the substrate in the water-cooling device with a flexible fixture, clean the substrate, preheat the substrate to 100°C, and turn on the water-cooling device;

[0050] Step 3: Set welding parameters, among which MIG additive parameters are: wire feeding speed is 7.5mm / min, welding speed is 11mm / s, shielding gas flow rate is 20L / min; TIG additive para...

Embodiment 3

[0061] The welding wire used by the MIG additive robot is ER130S-G high-strength steel welding wire with a diameter of 1.2mm; the welding wire used by the TIG additive robot is 316L stainless steel wire with a diameter of 1.2mm; the substrate is a 6mm thick 304 stainless steel substrate; the shielding gas is pure argon;

[0062] Step 1: According to the size and shape of the workpiece to be formed, use CAD to build the model, and automatically generate the trajectory of the additive material by the computer;

[0063] Step 2: Turn on the power, wait for the MIG-TIG composite additive device to be ready, turn on the shielding gas, fix the substrate in the water-cooling device with a flexible fixture, clean the substrate, preheat the substrate to 100°C, and turn on the water-cooling device;

[0064] Step 3: Set welding parameters, among which MIG additive parameters are: wire feeding speed is 7.2mm / min, welding speed is 10mm / s, shielding gas flow rate is 20L / min; TIG additive par...

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Abstract

The invention discloses an MIG-TIG composite additive method. The MIG-TIG composite additive method specially comprises the following steps of establishing a model with CAD, and generating an additivetrack through a computer automatically; switching on a power supply, and installing and cleaning a baseplate; opening a water cooling device, and manufacturing additives on the baseplate using MIG and TIG additive methods alternately; and performing remelting and processing without filling wires through TIG upon completion of MIG additives of each layer, and reducing additive defects. According to the MIG-TIG composite additive method, the advantages of two additive methods are utilized fully, and the additive accuracy is improved while the additive efficiency is improved. Thus, the wire arcadditive manufacture with high efficiency and accuracy is achieved.

Description

technical field [0001] The invention relates to the technical field of additive manufacturing, in particular to a MIG-TIG composite additive method. Background technique [0002] Additive manufacturing technology is a technology based on CAD / CAM design, which uses a layer-by-layer accumulation method to manufacture solid parts. Compared with traditional subtractive manufacturing (cutting) technology, it is a manufacturing method of material accumulation. Heat sources commonly used in manufacturing processes are high-energy beams and electric arcs. [0003] The arc additive manufacturing technology mainly uses the welding arc as the heat source, and the metal welding wire as the additive material. The heat generated by the arc melts the welding wire, and then accumulates layers from bottom to top on the selected substrate according to the preset additive path until it is completed. Additive manufacturing. According to the heat source classification, arc additive manufacturi...

Claims

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Application Information

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IPC IPC(8): B23K9/04B23K9/167B23K9/173B23K9/32
CPCB23K9/04B23K9/167B23K9/173B23K9/32
Inventor 王克鸿许雪宗金鸣宋正东汪海孙智鸣何思源李能周琦冯曰海
Owner NANJING UNIV OF SCI & TECH
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