Arc discharge type capacitance energy storage stud welding machine

Abstract

The invention discloses an arc discharge type capacitance energy storage stud welding machine, comprising a transformer, a welding main circuit, an arc initiation circuit and a control module; wherein, the welding main circuit comprises a charging rectifier bridge, a charging controlled silicon, a storage capacitor and a discharging controlled silicon; the charging rectifier bridge is connected with the secondary coil of the transformer by the charging controlled silicon, the storage capacitor is connected with the output terminal of the charging rectifier bridge in parallel and is connected with the output terminal of the welding main circuit by the discharging controlled silicon; the arc initiation circuit comprises an arc initiation controlled silicon and an arc initiation rectifier bridge, wherein, the arc initiation rectifier bridge is connected with the secondary coils of the transformer by the arc initiation controlled silicon, the output terminal of the arc initiation rectifier bridge is connected with the output terminal of the welding main circuit in parallel; and the control terminals of the charging controlled silicon, the discharging controlled silicon and the arc initiation controlled silicon are respectively connected with the control module. The invention provides an arc discharge type capacitance energy storage stud welding machine which can weld galvanized steel plates with low failure rate.

Description

[technical field] [0001] The invention relates to welding equipment, in particular to a drawn-arc capacitor energy storage stud welding machine used in the field of sheet metal. [Background technique] [0002] Stud welding is a welding method in which a metal stud or stud-like workpiece is perpendicularly welded to another workpiece. At present, there are two types of stud welding machines in China: drawn-arc type and capacitor energy storage type: drawn-arc stud welding machines are divided into two types: long-cycle and short-cycle. [0003] The welding time of long-cycle stud welding machine is longer, generally 100MS - 2500MS. The welding power supply is an arc welding power supply with high no-load voltage and large output current. It needs a three-phase 380V working power supply, which can only weld For studs with a diameter of 6-30MM, the ratio of the diameter of the welding stud to the thickness of the workpiece plate is less than 3. Otherwise the workpiece will be...

AI Technical Summary

Problems solved by technology

Cannot be welded automatically

[0006] Chinese patent 200610052886.X discloses an energy storage drawn arc stud welding machine, which adopts relay analog control, and its disadvantage is that it cannot be connected to an automatic feeder for automatic welding

Its charging range is small, only 60-90V, and the failure rate of the relay control method is high, so it cannot weld the plate with coating

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