For transformers with small capacity, 50Hz power frequency AC can be used, while for transformers with large capacity, inverter technology has been used to change 50Hz power frequency AC into 600 ~ 700Hz AC, so as to reduce and reduce the volume of transformers. After voltage transformation, 600 ~ 700Hz AC welding can be directly used, or secondary rectification can be carried out and DC welding can be used. The welding parameters are adjusted by the timer, see Figure 1b. The new timer has been computerized, so the robot control cabinet can directly control the timer without additional interface. The welding tongs of spot welding robot usually use pneumatic welding tongs. The opening between the two electrodes of pneumatic welding tongs is generally only two-stage stroke. Moreover, once the electrode pressure is set, it cannot be changed at will. In recent years, a new type of electric servo spot welding clamp has emerged. The opening and closing of the welding clamp are driven by the servo motor and fed back by the code disk, so that the opening degree of the welding clamp can be arbitrarily selected and preset according to the actual needs. Moreover, the pressing force between electrodes can also be adjusted steplessly. The welding equipment of the welding robot adopts an integrated welding clamp, and the welding transformer is installed behind the welding clamp, so the transformer shall be miniaturized as far as possible. Automatic welding equipment.
Advantages of automatic welding robot
1. Robot welding can improve product quality
In the welding process, as long as the welding parameters and motion trajectory are given, the robot will accurately repeat this action. The welding parameters such as welding current, voltage, welding speed and welding wire length play a decisive role in the welding results. When robot welding is adopted, the welding parameters of each weld are constant, and the weld quality is less affected by human factors, which reduces the requirements for workers' operation technology. Therefore, the welding quality is stable, so as to ensure the quality of our products. In manual welding, the welding speed and wire elongation change, so it is difficult to achieve the uniformity of quality. Automatic welding equipment.
2. Robot welding can improve production efficiency
The welding robot has short response time and rapid action. The welding speed is 60-3000px / min, which is much higher than that of manual welding. The robot does not stop or rest during operation, but it is impossible for workers to stop and rest at work. At the same time, the working efficiency of workers is also affected by mood and other factors. Workers will ask for leave, daze, chat, smoke and go to the toilet. Overtime pay is required for overtime, The robot does not have the above problems. As long as the external water, electricity and other conditions are guaranteed, it can continue to work, which virtually improves the production efficiency of the enterprise.
3. Robot welding is easy to arrange production plan
Due to the high repeatability of the robot, as long as the parameters are given, it will always act according to the instructions. Therefore, the robot welding product cycle is clear and it is easy to control the product output. The production rhythm of the robot is fixed, so the production plan is very clear. Accurate production planning can make the production efficiency of enterprises and the comprehensive utilization of resources greater.
4. Robot welding can reduce the cost of enterprises
The reduction of enterprise cost by welding robot is mainly reflected in large-scale production. One robot can replace 2 to 4 industrial workers, which is different according to the specific situation of the enterprise. The robot has no fatigue and can produce continuously 24 hours a day. In addition, with the application of high-speed welding technology, the cost of robot welding is reduced more obviously.