As customer products have higher and higher requirements for screw locking quality, higher requirements have also been put forward for the tightening tools of automatic screw locking machines during the automatic screw locking process. Mainly manifested in many aspects of the mind:
1. During the automatic screw locking process, the locking torque can be monitored. Or the torque can be displayed during the locking process.
2. During the screw locking process, the torque can output different torque values in segments according to the torque requirements of the product.
3. The torque precision of the screw locking process is required to be controlled within a relatively high precision range.
Regarding the requirements stated by users, in the automatic screw locking process, there are currently the following methods:
1. The automatic screw locking machine is equipped with a servo motor electric screwdriver. This method is currently widely used and has mature technology. The electric screwdriver is light in weight, but the cost is very high.
2. Use a basic servo motor instead of a servo electric screwdriver, and collect the torque signal by taking the torque of the servo motor. This method is relatively low-cost, but has a large volume, and the torque cannot be displayed during the screw locking process.
3. At present, some manufacturers enter special commands into the servo driver to ensure that after replacing the servo electric screwdriver with a servo motor, the torque value during screw locking can be maintained.