The influence of position error in CNC machining on machining accuracy:
Position error refers to the amount of change or deviation between the actual surface, axis or symmetry plane of the part after processing relative to its ideal position, such as verticality, position, symmetry, etc.
The position error in CNC machine tool processing usually refers to the dead zone error. The cause of the position error is mainly due to the gap and elastic deformation generated during the transmission of the machine tool parts during the processing, and the tool head of the machine tool needs to overcome the friction force during the processing Factors such as lead to position error. In the open-loop system, the position accuracy is greatly affected, while in the closed-loop follow-up system, it mainly depends on the accuracy of the displacement detection device and the speed amplification factor of the system, and the impact is generally small.
The influence of position error in CNC machining on machining accuracy:
Position error refers to the amount of change or deviation between the actual surface, axis or symmetry plane of the part after processing relative to its ideal position, such as verticality, position, symmetry, etc.
The position error in CNC machine tool processing usually refers to the dead zone error. The cause of the position error is mainly due to the gap and elastic deformation generated during the transmission of the machine tool parts during the processing, and the tool head of the machine tool needs to overcome the friction force during the processing Factors such as lead to position error. In the open-loop system, the position accuracy is greatly affected, while in the closed-loop follow-up system, it mainly depends on the accuracy of the displacement detection device and the speed amplification factor of the system, and the impact is generally small.
Machining accuracy errors caused by lathe positioning in CNC lathe processing:
Through long-term data analysis and practical operation of parts processing, it can be seen that the positioning of the lathe has a greater impact on the machining accuracy of the CNC lathe.
From the structural point of view, the machining errors of CNC lathes are mostly caused by positioning accuracy. Among them, the feed system of the lathe is the main link that affects the positioning accuracy.
The feed system of a CNC lathe is usually composed of two parts: a mechanical transmission system and an electrical control system. The positioning accuracy is related to the mechanical transmission system in the structural design.
In the closed-loop system, the CNC lathe can usually prevent the position deviation of the main components in the feed system, such as the ball screw and other components, through the positioning detection device.
As for the open-loop system, due to many influencing factors and complicated situations, positioning monitoring cannot be performed, so it has a greater impact on the machining accuracy of the CNC lathe.
Countermeasures to improve the machining accuracy of CNC lathes:
Improve machining accuracy by controlling the original error of CNC machine tools
Reasonably design the core components of machine tools to avoid positioning errors
Improve the machining accuracy of CNC machine tools through real-time monitoring technology
With the continuous improvement of CNC technology, the CNC lathe is monitored in real time throughout the machining process, the error links in the machining process are adjusted in time, and the error data of each link in the machining process is collected, fed back to the control terminal, and passed The error data adopts the corresponding error compensation mechanism to carry out timely error compensation, which can effectively improve the machining accuracy of the parts.