How To Solve Problem of Large Bending Angle Error of CNC Press Brake
In my experience with CNC press brakes, encountering large bending angle errors can be a frustrating challenge that affects the quality of the final product. These errors can arise from various factors, including incorrect programming, tooling issues, or machine calibration problems. Over the years, I have developed strategies to identify and resolve these issues effectively, ensuring precise bends and optimal performance. In this article, I will share my insights on how to solve the problem of large bending angle errors in CNC press brakes, providing practical tips and techniques that can help operators enhance their bending accuracy and overall productivity.
Understanding the Causes of Bending Angle Errors
Before diving into solutions, it’s important to understand the potential causes of large bending angle errors. Here are some common factors that can contribute to this problem:
- Incorrect Tooling: Using the wrong die or punch can significantly affect the bending angle. Each tool has specific characteristics that influence the bending process.
- Machine Calibration: If the CNC press brake is not calibrated correctly, the bending angles may not match the programmed specifications.
- Material Variability: Differences in material thickness, type, and properties can lead to inconsistencies in bending. For example, softer materials may bend differently compared to harder ones.
- Programming Errors: Mistakes in the CNC program, such as incorrect angle inputs or offsets, can result in unexpected bending angles.
- Backgauge Positioning: Misalignment of the backgauge can lead to inaccurate positioning of the material, affecting the bending angle.
Steps to Solve Bending Angle Errors
- Check whether the compensation deflection of the CNC bending machine compensation cylinder is large and cannot completely recover the zero position.
โCheck if the CNC bending machine quick clamp is loose.
โCheck whether the installation of the bow plate of the CNC bending machine is normal, and whether the screw hole is dead.
โCheck if there is any change in the bottom dead point of the CNC bending machine every time.
โThe variation of the CNC bending machine sheet itself (thickness, material, stress).
โIs there any looseness in the scale of the CNC bending machine?
โThe positioning accuracy of the CNC bending machine is not accurate: whether the offset value of the proportional valve zero is suitable, the positioning can not reach the bottom dead center so that it cannot return.
