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Welding design technology
Publisher: suzhou kailinneng automation equipment co., LTD Release time：2023-03-23 09:12:32 Click on the number of times：59 Shut down
(1) New resistance welding technology medium frequency resistance welding: medium frequency inverter DC resistance welding (referred to as medium frequency resistance welding) control power supply is made of three-phase alternating current through the rectifier circuit into pulsating direct current, and then through the power switch component of the inverter circuit into medium frequency square wave access transformer, after voltage reduction rectifier into small pulsating direct current supply electrode for welding the workpiece.
Intermediate frequency resistance welding has many advantages:
First, the welding quality is good. The current response time of intermediate frequency welding is 1ms, and the adjustment precision and monitoring precision are greatly improved. Therefore, the welding quality is greatly improved and the control precision is also high.
Second, the welding speed is fast. Inverter resistance spot welder is DC output, heating centralized, shorten welding time.
Third, the energy saving effect is obvious. Inverter welding transformer works at a higher frequency, the loss is small, DC output to improve the power factor, energy saving effect is obvious.
Fourth, equipment volume and quality. Inverter DC resistance spot welding machine transformer is greatly reduced, the equipment is lighter and lighter.
Fifth, it can be widely used in spot welding of dissimilar metals.
Sixth, energy conservation and environmental protection. Medium frequency welding is three-phase balanced load, and the impact on the power grid is much smaller than single-phase AC welding, reducing the requirements of the power supply system, in line with the national energy policy.
At present, medium frequency resistance welding has been widely used in automobile welding production. In the production of body parts, the fixed high-power medium-frequency resistance spot welding equipment is mainly used to implement bump welding or multi-point bump welding for body parts. In the body welding production line, intermediate frequency resistance welding is used for suspension spot welding or robot spot welding. At present, medium frequency spot welding is widely used for welding galvanized steel plate and high strength steel. Intermediate frequency welding technology has been applied in batch in the preparation of new products.
In order to improve the quality of robot spot welding and reduce the load of robot snatch, robot intermediate frequency spot welding pliers have been widely used in the body welding production line. At present, the medium frequency spot welding pliers and supporting power and welding controller used by domestic automobile manufacturers are mostly provided by foreign companies, such as Germany's BOSCH, NIMAK, Japan's Kohara, etc.
Servo spot welding: Servo technology with a large number of welding robot application and development, in order to ensure the high efficiency of the production mode, reduce the impact of pneumatic welding spot welding on the workpiece surface, improve the surface quality of the workpiece, to achieve the precise control of the pressure process of the welding pliers, a new type of welding pliers came into being -- servo type welding pliers. Motor servo driven welding pliers referred to as servo welding pliers, is a kind of robot welding pliers developed in recent years can improve the quality of spot welding performance. Faw Jiefang J6 welding production line has adopted servo welding pliers, the use effect is ideal