A welding gun capable of automatically adjusting the extension length of the conductive tip for narrow gap welding
A technology of automatic adjustment and extension length, applied in welding equipment, laser welding equipment, electrode accessories, etc., can solve problems such as arc instability and lower welding quality, so as to improve productivity, improve welding quality, and reduce welding materials and energy The effect of consumption
Inactive Publication Date: 2016-06-01
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
However, the small groove size will cause the torch tip of the welding torch to be unable to enter the inside of the groove. In order to make the droplet transition smoothly at the bottom of the weld, the dry elongation of the welding wire has to be increased, and the side wall of the groove has a certain impact on the arc. Attraction makes the arc unstable and reduces the welding quality
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[0020] The concept of the narrow gap welding gun that can enter the groove and can automatically adjust the extension length of the contact tip provided by the present invention mainly refers to: Compared with the general laser-arc hybrid welding gun, the narrow gap welding gun is used to make The cylindrical protection nozzle with the shielding gas coaxial with the arc does not need to wrap the conductive tip, but exposes the conductive tip to the outside. According to the actual groove size, determine the length of the contact tip during the first welding, adjust the appropriate shielding gas flow, and block the shielding gas through the two side walls of the groove, thereby forming a protective atmosphere inside the groove to protect the welding Sew. The conductive tip is flat, can be retracted automatically, and can enter the inside of a narrow groove. Two symmetrical height sensors are integrated at the end of the contact tip, which can automatically detect the distance b...
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The invention discloses a welding gun capable of automatically adjusting extending length of a conductive nozzle used for narrow gap welding. The welding gun comprises a nozzle, a gas distributor, a conductive nozzle, a height sensor, a central processing unit (CPU) and an actuator, wherein an air outlet which is naked outside is formed in the gas distributor, and the gas distributor is prevented to be sliden off by the tightening force for protecting the nozzle; the electric nozzle is in a flat shape and is connected with the gas distributor, two symmetrically arranged height sensors are arranged at the ends of the electric nozzle and are used for detecting the distance between the conductive nozzle and a weld surface; and the CPU adjusts the extension and shrinkage of the conductive nozzle according to the acquisition signal control actuator of the height sensor. According to the welding gun, the extruded length of the conductive nozzle can be automatically regulated by sensing the distance between the bottom of the welded joint and the conductive nozzle through the height sensor, so that the dried elongation of welding wires can be guaranteed in a reasonable range, electric arc in a laser-electric arc hybrid welding process can exist stably, and the high quality welding of a thick plate can be finally realized.
Description
Technical field [0001] The invention belongs to the technical field of material processing, and in particular relates to a welding gun for laser-arc hybrid welding, which can automatically adjust the extension length of the contact tip, and is especially suitable for thick plate narrow gap welding. Background technique [0002] The welding of thick plates is an indispensable key process in the manufacturing of ships and nuclear facilities, laying of oil and gas pipelines, power station construction, and the construction of various large-scale steel structures. The thickness of these facilities is very large, and is limited by the maximum output power of the laser. In many cases, single laser welding cannot complete the welding of large thickness and thick plates. Therefore, the laser-arc hybrid welding method has become the first choice for thick plate welding. On the one hand, this method can reduce the required laser power, thereby reducing the requirements for the laser; on t...
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IPC IPC(8): B23K26/348
CPCB23K9/26B23K26/348B23K26/702B23K2101/185
Inventor 王春明李若杨胡席远邵新宇黄禹张威
Owner HUAZHONG UNIV OF SCI & TECH