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AssigneeBeijing University of Technology
InventorsFan Jiang, Jianxin Wang, Shujun Chen, Jinlong Gong, Guangqiang Men
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A low-back-pressure penetrating arc welding apparatus and a welding method using the same are disclosed. Through vacuuming a central vacuum chamber of a low-back-pressure protection device by a suction device, a plume of a penetrating arc located in the central vacuum chamber, as well as a back side of a keyhole molten pool, are maintained in a negative-pressure vacuum state relative to an argon gas ambience. A pressure gradient in the keyhole molten pool is thus generated that points from a front side of the keyhole molten pool to the back side of the keyhole molten pool. The pressure gradient thus further enhances a stiffness of the front side of the keyhole molten pool as well as a stability of the penetrating arc, resulting in an enhancement in the piercing capability of the penetrating arc, without changing a force distribution and a temperature gradient of the keyhole molten pool.
A low-back-pressure penetrating arc welding apparatus for welding work pieces, comprising:
A welding method using a low-back-pressure penetrating arc welding apparatus having a low-back-pressure protection device, comprising:
Dependencies are inferred from the claim text.