An analysis of common application problems of six axis welding robot
The six-axis welding robot has six degrees of freedom, so the welding range is wide, the joints are flexible, and the operation is simple. This article summarizes the following common problems of six axis robot:
1. Weld size mismatch
The weld size mainly refers to the width and reinforcement of the weld. Generally, the welding speed, current, voltage and welding range set by the system are constant. If there is a weld mismatch, it is necessary to check the wire feeding mechanism. Wear of the wire feeding machine or blockage of the wire feeding nozzle will cause the weld size mismatch.
2. Welding deviation
In case of welding deviation, it is necessary to regrind the welding seam, so it is easy to cause low production efficiency and delay the production plan of the enterprise. The welding deviation may be caused by the inaccurate position of the welding gun. The worker can adjust the welding position, and then check whether the parameters set by the system are consistent
3. Weld spatter
The spatter of welding spot will produce granular small spots on the welded workpiece, which will affect the welding quality. In case of welding spot splashing, it is necessary to check whether the materials of the weldments meet the welding requirements or whether the hydrogen and nitrogen content of the welding materials, and whether the welding wire is too long. In the daily welding operation, a better gas shielded welding is selected to prevent welding spot splashing.
4. Burn mechanical arm
Welding robots can replace human beings to work in dangerous and harmful environments. At the same time, it also brings another problem. Although the machine does not breathe and is not afraid of toxic gases, welding is a high-temperature spark ejected, which often "burns" the robot's arm. In view of this situation, a protective cover can be added to the welding robot, and a stepped protection scheme can be adopted to ensure that the welding arm and pipeline of the robot are not burned by splashing sparks.
5. Personal injury accident
When the welding robot is running online, sometimes people may be injured by mistake, which requires that the staff must not enter the area where the robot’s movement range, and there should be no interference in its movement area. This is the most important principle of the safety management of the welding robot. In addition, corresponding reliable measures shall be taken, such as installing protective fence around the welding robot; A plug-in electric contact switch is set on the safety door at the entrance of the guardrail to quickly cut off the power supply to the robot in case of emergency; Multiple emergency stop buttons are installed near the robot station, which can be used for emergency shutdown in case of accident.
In the daily welding operation, we should select appropriate welding materials, carry out the welding operation in sequence, optimize the welding system parameters in time, and update the data in time to avoid problems affecting the production process of the enterprise.
The above is a summary of the problems and solutions that often occur in the daily welding work of six axis welding robots. Prevention is more than maintenance. In the daily use of six axis welding robots, enterprises should maintain the welding robots to prevent problems from slowing down the production process.