Connecting structure for spindle body and movable iron core in stud welding gun

Abstract

The invention discloses a connecting structure for a spindle body and a movable iron core in a stud welding gun. The spindle body, the movable iron core and a fixed sleeve in which a coil is arranged are sequentially arranged in a cavity of a welding gun shell from front to back; a connecting block is arranged at the tail end of the spindle body; the movable iron core is movably arranged at the front end of the fixed sleeve; a first reset spring capable of enabling the spindle body subjected to arc striking to be reset is arranged in the welding gun shell; the spindle body is movably inserted in a shaft sleeve fixedly arranged in the cavity; a driving shaft electrically insulated from the spindle body is fixedly arranged at the tail end of the connecting block; the front end of the movable iron core is provided with a connecting hole matched with the driving shaft; the driving shaft is inserted into the connecting hole and can axially slide in the connecting hole; a regulating space is formed between the connecting block and the movable iron core; a locking structure capable of locking the driving shaft in the connecting hole is arranged between the driving shaft and the movable iron core. The connecting structure has the advantages that welding quality is high and welding efficiency and the welding qualified rate can be effectively improved.

Description

technical field [0001] The invention relates to a stud welding torch, in particular to a connection structure between a main shaft body and a moving iron core in the stud welding torch. Background technique [0002] Arc stud welding is to use the arc generated between the top of the stud and the plate to melt the top of the stud and the plate at the same time to form a molten pool, and then apply a certain pressure to the stud to quickly squeeze the stud into the molten pool to form a weld. The welding method of the joint. Arc stud welding is widely used in automotive, shipbuilding, aviation, locomotive and other industries. [0003] At present, the common drawn arc stud welding torch used for arc stud welding has a structure: a welding torch housing, in which a main shaft body, a moving iron core, and a coil are arranged in sequence from front to end in the cavity of the welding torch housing The fixed sleeve and the static iron core, the main shaft body and the moving ir...

AI Technical Summary

Problems solved by technology

[0004] Before starting the welding work, put the stud into the integrated chuck seat after setting the aluminum sleeve on the head of the welding torch, and then put the torch head down so that the front end of the aluminum sleeve is pressed against the plate. At this time, the front end of the stud is also Pressing against the plate, since the main shaft and the moving iron core in the welding torch are fixedly connected, there will inevitably be machining errors in the stud during the processing process. When the actual length of the stud is slightly longer, the stud passes through the main shaft. Compress the spring and slide to the tail end, so that the lifting gap between the moving iron core and the static iron core becomes smaller, so that the arc striking distance is shortened during welding arc striking, and it is prone to the phenomenon that the arc cannot be struck, which greatly reduces the qualified rate of welding , welding efficiency is relatively low

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