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Process and device for welding magnesium alloy sheets

A welding device and magnesium alloy technology, applied in welding equipment, welding media, auxiliary devices, etc., can solve the problems of affecting the welding fusion degree of magnesium alloys, affecting the appearance of magnesium alloy surfaces, and high hardness and brittleness, so as to improve the welding fusion degree and surface Quality, reduce oxidation slag inclusion, improve the effect of tensile strength

Active Publication Date: 2014-04-09
山东宏泰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Severe oxidation phenomena such as dense smoke, spatter and burning are produced during magnesium alloy welding, which not only affects the appearance of the magnesium alloy surface, but also affects the fusion of magnesium alloy welding
Argon shielded welding is used in conventional welding to directly protect the weld, but the weld is hard and brittle, and the back is prone to oxidation, resulting in a slight decrease

Method used

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  • Process and device for welding magnesium alloy sheets
  • Process and device for welding magnesium alloy sheets

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, a welding process for magnesium alloy plates is performed using argon gas with a volume percentage of 70-80% and helium gas with a volume percentage of 20-30% for protective welding; the process is as follows:

[0025] Control the pressure gauge (9) at the mouth of the argon and helium cylinders during welding, and flow into the gas mixer (3) according to the volume ratio of 70-80% argon and 20-30% helium; The length of the groove (5) of the welding platform (4) is selected so that the length of the groove (5) is 10-30mm longer than the length of the weld; when welding, open the inlet pipe valve (7) corresponding to the selected groove (5), and close the The selected groove (5) corresponds to the intake pipe valve (7), and the magnesium plate is docked above the selected groove (5), and welding can be performed when the ventilation time exceeds 5 seconds.

[0026] The magnesium alloy plate welding device includes a welding platform (4), a groove (5) ...

Embodiment 2

[0034] A kind of welding process of magnesium alloy plate in this embodiment, the process is as follows:

[0035] Control the pressure gauge (9) at the mouth of the argon and helium cylinders during welding, and flow into the gas mixer (3) according to the volume ratio of 70% argon and 30% helium; select the welding platform according to the length of the weld seam of the magnesium plate (4) of the groove (5), so that the length of the groove (5) is greater than the length of the weld by 15mm; when welding, open the corresponding intake pipe valve (7) of the selected groove (5), and close the unselected groove (5) ) corresponding to the intake pipe valve (7), butt the magnesium plate above the selected groove (5), and weld it when the ventilation time exceeds 5 seconds.

[0036] The magnesium alloy plate welding device includes a welding platform (4), a groove (5) is set on the welding platform (4), and one end of the groove (5) is connected through a copper tube (6), and the ...

Embodiment 3

[0044] In this embodiment, a welding process for magnesium alloy plates is performed using argon gas with a volume percentage of 70-80% and helium gas with a volume percentage of 20-30% for protective welding; the process is as follows:

[0045] Control the pressure gauge (9) at the mouth of the argon and helium cylinders during welding, and flow into the gas mixer (3) according to the volume ratio of 70-80% argon and 20-30% helium; The length of the groove (5) of the welding platform (4) is selected so that the length of the groove (5) is 10-30mm longer than the length of the weld; when welding, open the inlet pipe valve (7) corresponding to the selected groove (5), and close the The selected groove (5) corresponds to the intake pipe valve (7), and the magnesium plate is docked above the selected groove (5), and welding can be performed when the ventilation time exceeds 5 seconds.

[0046] The magnesium alloy plate welding device includes a welding platform (4), a groove (5) ...

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Abstract

The invention relates to a process and a device for welding magnesium alloy sheets. The magnesium alloy sheets are protectively welded by the aid of mixtures, and the mixtures comprise, by volume, 70-80% of argon and 20-30% of helium. The process includes controlling pressure gauges at openings of an argon tank and a helium tank during welding and filling the 70-80% of argon and the 20-30% of helium into a gas mixer; selecting grooves of a welding platform according to the lengths of weld joints of magnesium sheets; opening gas inlet pipe valves corresponding to the selected grooves during welding, closing gas inlet pipe valves corresponding to the unselected grooves, butting the magnesium sheets to the upper sides of the selected grooves and welding the magnesium sheets after 5-second gas filling time elapses. The lengths of the selected grooves are larger than the lengths of the weld joints by 10-30mm. The process and the device have the advantages that the degree of welding fusion and the surface quality can be improved, the shortcoming of oxidation of back surfaces of magnesium alloy sheets can be overcome, oxidation conditions of welding spots and surrounding materials of the welding spots can be improved, oxidation slag inclusion due to oxidation can be reduced, and the tensile strength of welded magnesium alloy can be improved.

Description

technical field [0001] The invention relates to a magnesium alloy sheet welding, in particular to a magnesium alloy sheet welding process and a device thereof. Background technique [0002] Magnesium alloy is an alloy composed of magnesium and other elements. Its characteristics are: low density, high specific strength, large elastic modulus, good shock absorption, greater impact load capacity than aluminum alloy, and good corrosion resistance to organic matter and alkali. The main alloying elements are aluminum, cerium, zinc, thorium, manganese, zirconium or cadmium. Magnesium-aluminum alloys are currently the most widely used, followed by magnesium-manganese alloys and magnesium-zinc-zirconium alloys. Mainly used in transportation, chemical industry, aerospace, rocket, aviation, industrial sectors. [0003] Severe oxidation phenomena such as dense smoke, spatter and burning are produced during magnesium alloy welding, which not only affects the appearance of the magnesi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K37/00
CPCB23K35/383
Inventor 翟慎宝孙启明柴绍春王鲁东魏其宾石宪柱
Owner 山东宏泰科技有限公司
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