Automatic welding gun for realizing arc stud welding of T-shaped welding stud

Abstract

The invention discloses an automatic welding gun for realizing arc stud welding of a T-shaped welding stud. The automatic welding gun comprise a welding gun main body; the welding gun main body comprises a shell, a main shaft body, a welding stud clamping head, and a driving mechanism which is used for driving the main shaft body to perform lifting motion; guide columns are arranged at the two sides of the shell; guide sleeves are respectively arranged at the upper and lower parts of the shell at each side; the guide column at each side penetrates into the upper and lower guide sleeves at the same side; a spring sleeves the guide column positioned between the upper and lower guide sleeves; a limiting block is arranged at the lower end of the spring; the lower ends of the guide columns at the two sides are fixedly connected with a fixing seat; a passing hole for the welding stud clamping head to smoothly pass through is formed on the fixing seat and under the welding stud clamping head; a ceramic ring clamping head, under the passing hole, is fixedly connected with the bottom of the fixing seat. The welding gun disclosed by the invention is capable of realizing automatic clamping and separation of the T-shaped welding stud and a ceramic ring for the first time, can be matched with a robot or a three-axis motion platform in use, and is capable of realizing automatic arc stud welding of the T-shaped welding stud.

Description

Technical field [0001] The invention relates to an automatic welding gun used for arc stud welding, in particular to an automatic welding gun for realizing T-shaped welding nail arc stud welding, and belongs to the technical field of stud welding equipment. Background technique [0002] Arc stud welding uses the welding arc as the heat source, the ceramic ring as the protective measure, and the stud itself as the electrode. Through the welding arc, the stud and the weldment (plate or pipe) are stably burned, and the weldment is welded. The zone is heated to form a molten pool. After the end of the stud forms a molten layer, the stud is inserted into the molten pool at high speed under the action of mechanical pressure such as a welding gun, and the liquid metal is squeezed into the forming groove of the porcelain ring, thereby forming a high-speed joint The planting welding method is widely used in the planting of medium and thick plates in the construction of large structures su...

AI Technical Summary

Problems solved by technology

The above-mentioned driving structure has the following main disadvantages: (1) In actual use, due to the existence of factors such as machining errors, installation errors, and thermal deformation of the welding torch shell, the concentricity between the shaft sleeve and the fixed sleeve will not be high, so that the The main shaft body and the moving iron core, which are fixedly connected at the head and tail, increase the resistance when moving axially, which greatly increases the wear between the main shaft body and the shaft sleeve, as well as between the moving iron core and the fixed sleeve, making the service life of the welding torch very short. It can only be used for half a year, and it can be used for one year at most; (2) It is easy to cause the moving iron core to be stuck in the fixed sleeve or the moving iron core cannot be inserted into the fixed sleeve, so that the axial movement of the spindle body cannot be realized, resulting in abnormal welding work (3) When the actual length of the stud exceeds the standard, the stud compresses the spring through the main shaft and slides to the tail end, which will make the lifting gap between the moving iron core and the static iron core smaller, so that the welding arc will start When the arc striking distance is shortened, it is prone to the phenomenon that the arc cannot be struck, which greatly reduces the qualified rate of welding and reduces the welding efficiency.

In addition, since the power source of the linear motor driving structure is a linear motor precisely controlled by a microprocessor, not only the structure is complex, the operation requirements are high, but also the cost is high, and the operator cannot perform maintenance at the welding site, which is not suitable for the harsh working environment

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