Magnesium Alloy Sheet Welding Process and Its Device

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

Active Publication Date: 2015-08-26
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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  • Magnesium Alloy Sheet Welding Process and Its Device
  • Magnesium Alloy Sheet Welding Process and Its Device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0025] During welding, the pressure gauge (9) that controls the mouth of the argon and helium cylinders, flows 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 greater than the length of the weld by 10-30mm; when welding, open the selected groove (5) corresponding to the intake pipe valve (7), and close the The selected groove (5) corresponds to the intake pipe valve (7), butt the magnesium plate above the selected groove (5), and the welding can be done when the ventilation time exceeds 5 seconds.

[0026] The magnesium alloy sheet welding device includes a welding platform (4), a groove (5) is provided on the welding platform (4), one end of the groo...

Embodiment 2

[0034] The welding process of magnesium alloy plate in this embodiment is as follows:

[0035] The pressure gauge (9) that controls the mouth of the argon and helium cylinders during welding, flows 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 magnesium plate weld (4) The groove (5) makes the groove (5) longer than the weld length by 15mm; when welding, open the selected groove (5) and the corresponding inlet valve (7), and close the unselected groove (5) ) The corresponding intake pipe valve (7), butt the magnesium plate above the selected groove (5), and the welding can be done when the ventilation time exceeds 5 seconds.

[0036] The magnesium alloy sheet welding device includes a welding platform (4), a groove (5) is provided on the welding platform (4), one end of the groove (5) is connected by a copper tube (6), and the copper tube (6) is A first pipeline (8) is provided, and the f...

Embodiment 3

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

[0045] During welding, the pressure gauge (9) that controls the mouth of the argon and helium cylinders, flows 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 greater than the length of the weld by 10-30mm; when welding, open the selected groove (5) corresponding to the intake pipe valve (7), and close the The selected groove (5) corresponds to the intake pipe valve (7), butt the magnesium plate above the selected groove (5), and the welding can be done when the ventilation time exceeds 5 seconds.

[0046] The magnesium alloy sheet welding device includes a welding platform (4), a groove (5) is provided on the welding platform (4), one end of the groo...

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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 plate welding, in particular to a magnesium alloy plate welding process and a device. 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 resistance to organics and alkali corrosion. The main alloying elements are aluminum, cerium, zinc, thorium, manganese, zirconium or cadmium. Currently the most widely used is magnesium aluminum alloy, followed by magnesium manganese alloy and magnesium zinc zirconium alloy. Mainly used in transportation, chemical, aerospace, rocket, aviation and industrial sectors. [0003] The violent oxidation phenomena such as dense smoke, spatter and burning during magnesium alloy welding not only affect the appearance of the magnesium alloy surface, but also affect the fusion de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K37/00
CPCB23K35/383
Inventor 孙启明王鲁东吕丽丽石宪柱鲁海
Owner 山东宏泰科技有限公司
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