Double-heat-source collaborative welding method and device for large thermal conductivity mismatched metal materials

A technology of metal materials and welding methods, which is applied in the field of double heat source collaborative welding methods and devices for metal materials with large thermal conductivity mismatches, can solve the problem of effective control of welding temperature for difficult joints, difficulty in forming metal materials with large thermal conductivity mismatches, and control The effect is limited and other problems, to achieve the effect of improving welding quality, increasing heat, and simple equipment

Active Publication Date: 2018-08-24
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This results in a very limited effect of a single heat source on the back of the joint, especially on the back side of the metal with high thermal conductivity. Difficulty in forming when connecting with metal materials

Method used

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  • Double-heat-source collaborative welding method and device for large thermal conductivity mismatched metal materials
  • Double-heat-source collaborative welding method and device for large thermal conductivity mismatched metal materials
  • Double-heat-source collaborative welding method and device for large thermal conductivity mismatched metal materials

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Experimental program
Comparison scheme
Effect test

Embodiment approach

[0035] Its implementation mode comprises the following steps:

[0036] Step 1: Docking workpiece: place the metal workpiece to be welded with a large thermal conductivity mismatch in a parallel manner in the center of the tooling table, and the gap between the two plates is 0-1mm;

[0037] Step 2: Set welding energy parameters: front heat source welding voltage 13-25V, wire feeding speed 2-10.5m / min, reverse heat source welding current 60-300A, welding speed 3-30mm / s, welding parameters of two heat sources during welding fixed;

[0038] Step 3: Set the welding position parameters to be perpendicular to the welding direction (+ near the steel side, - near the copper side), the front heat source is -0.4-0mm from the center of the weld, and the back heat source is -2-0mm from the center of the weld; along the welding direction (The front heat source is + at the front, and the back heat source is -), the front heat source is -2—+2mm from the back heat source, and the two heat sou...

specific Embodiment 1

[0043] It is carried out according to the following steps:

[0044] Step 1: Docking workpiece: Place the part to be welded of the metal workpiece with a large thermal conductivity mismatch in a parallel manner in the center of the through slot of the tooling table, and the gap between the two plates is 0.3mm;

[0045] Step 2: Set welding energy parameters: front heat source welding voltage 15.5V, wire feeding speed 3.5m / min, argon gas flow 15L / min; reverse heat source welding current 180A, argon gas flow 15L / min; welding speed 9mm / s, welding During the process, the welding parameters of the two heat sources are fixed;

[0046] Step 3: Set the welding position parameters along the welding direction (the front heat source is +, the rear is -), the front heat source is 0mm away from the back heat source; perpendicular to the welding direction (close to the steel side is +, close to the copper side is -), The front heat source is -0.4mm from the weld center, the back heat source ...

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Abstract

The invention discloses a double-heat-source collaborative welding method and device for large thermal conductivity mismatched metal materials, and belongs to the field of metal material welding. Whenwelding the large thermal conductivity mismatched metal materials, the method adopts two heat sources to simultaneously heat the front and back sides of joints and optimizes energy distribution of the joints by controlling energy parameters and positional parameters of the two heat sources, side heat input of high thermal conductivity metal is increased, the heat loss caused by the higher thermalconductivity is compensated, the low thermal conductivity metal side welding temperature is controlled, and the problem of large thermal conductivity mismatched metal material welding forming is solved and the joint welding quality is improved. The preheating effect of the joints is obtained by tilting the two heat sources on the front and back sides at a certain angle in the welding direction, and the single-pass welding double-sided forming of the joints is realized under auxiliary measures such as no chamfering and pre-weld preheating. The welding device can effectively adjust and controlthe heat distribution of the joints by precisely controlling the position of the welding heat sources in the three-dimensional space, and efficient and reliable connection of the large thermal conductivity mismatched metal materials is realized.

Description

technical field [0001] The invention relates to the field of material processing engineering, in particular to a method and device for synergistic welding of a metal material with a large thermal conductivity mismatch and dual heat sources Background technique [0002] With the development of science and technology, people's requirements for the diversification of the performance of various physical units and the low cost are constantly increasing. The welding of dissimilar materials has become one of the most active research directions in the field of material processing and manufacturing technology at home and abroad in recent years. The connection of steel-copper dissimilar metals can not only effectively save the amount of copper used and reduce the cost of workpieces, but also can combine the high thermal conductivity and excellent mechanical properties of the two metals, which has become a hot research topic in the field of dissimilar metal welding. [0003] However, d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K9/167B23K9/173B23K9/025B23K103/22B23K101/18
CPCB23K9/025B23K9/167B23K9/173
Inventor 黄继华程志叶政杨健陈树海赵兴科
Owner UNIV OF SCI & TECH BEIJING
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