How to control the machining accuracy of Manhart (Guangdong) CNC Machine Tool Co., Ltd.’s CNC rolling and bending machine?

How to control the machining accuracy of CNC rolling and bending machines?
As a high-precision and high-efficiency metal sheet processing equipment, CNC rolling and bending machines are widely used in industries such as ships, automobiles, and construction. In order to ensure machining quality and accuracy, it is necessary to strictly control the machining accuracy of CNC rolling and bending machines. This article will explore the control methods for machining accuracy of CNC bending machines from the aspects of CNC programming, closed-loop dynamic control model, coordinated control between upper and lower machines, application of rolling forming laws, rebound prediction and compensation, real-time dimensional feedback, and fault diagnosis and monitoring.
1、 CNC programming
The CNC program is the core of CNC bending machine processing, and the accuracy of its programming directly affects the machining accuracy. When programming CNC programs, factors such as material, thickness, and bending angle of the workpiece should be fully considered, and processing parameters such as rolling speed and rolling pressure should be reasonably set. At the same time, it is necessary to accurately calculate the tool path and machining sequence based on the specific shape and size of the workpiece, ensuring the stability and accuracy of the machining process.
2、 Closed-loop dynamic control model
In order to achieve real-time control of the machining accuracy of CNC rolling and bending machines, it is necessary to establish a closed-loop dynamic control model. This model can monitor various parameters during the machining process in real time, such as rolling speed, rolling pressure, bending angle, etc., and compare them with preset values. When there is a deviation between the actual value and the preset value, the control system will automatically adjust the machining parameters to eliminate the deviation and ensure the stability of machining accuracy.
3、 Coordinated control between upper and lower computers
The control system of CNC rolling and bending machines usually adopts a collaborative work mode between upper and lower machines. The upper computer is responsible for programming the CNC program, setting parameters, and monitoring the machining process, while the lower computer is responsible for executing the instructions of the upper computer and controlling the specific actions of the bending machine. To ensure machining accuracy, it is necessary to ensure smooth and coordinated communication between the upper and lower computers, and avoid a decrease in machining accuracy caused by information transmission errors or delays.
4、 Application of Rolling Bending Forming Law
The forming law of roll bending is an important theoretical basis in the machining process of CNC roll bending machines. By studying and applying the rolling and bending forming laws, the machining parameters and process can be optimized, and the machining accuracy can be improved. For example, selecting the appropriate bending speed and rolling pressure based on different materials and thicknesses of workpieces can ensure that the workpiece is subjected to uniform force and stable deformation during the machining process.
5、 Rebound prediction and compensation
Springback is an inevitable phenomenon in the processing of metal sheets. In order to reduce the impact of springback on machining accuracy, it is necessary to establish a springback prediction model to predict the amount of springback during the machining process. At the same time, based on the predicted results, the machining parameters are compensated to reduce rebound and improve machining accuracy.
6、 Real time size feedback
The real-time size feedback system can monitor the size changes of the workpiece during the machining process in real time and provide data feedback to the control system. By providing real-time dimensional feedback, errors during the machining process can be detected and corrected in a timely manner, ensuring stable machining accuracy. In addition, real-time dimensional feedback can also provide reference data for subsequent machining processes, optimize machining parameters and process.
7、 Fault diagnosis and monitoring
Fault diagnosis and monitoring are important means to ensure stable machining accuracy of CNC bending machines. By real-time monitoring and fault diagnosis of equipment operation status, potential problems can be identified and resolved in a timely manner, avoiding the decrease in machining accuracy caused by equipment failures. At the same time, regular maintenance and upkeep are also key to ensuring the normal operation of equipment and stable processing accuracy.
In summary, the machining accuracy control of CNC rolling and bending machines involves multiple aspects, which need to be comprehensively considered and optimized from multiple aspects such as CNC programming, closed-loop dynamic control model, coordinated control between upper and lower machines, application of rolling and bending forming laws, rebound prediction and compensation, real-time dimension feedback, and fault diagnosis and monitoring. Only in this way can we ensure the stable operation of the CNC rolling and bending machine with high precision and efficiency during the machining process.