Introduction
Bending machines play a crucial role in the metal fabrication industry, precisely bending metal sheets to create various components. However, during operations, it is common for workpieces to loosen during pressing, which significantly impacts product quality and production efficiency. This article will thoroughly explore the causes of this issue and its resolution strategies, providing some common troubleshooting and maintenance guidelines for bending machines.
Analysis of Workpiece Loosening Causes
Common Mechanical Bending Machine Failures
1. Excessive clearance between the slide and guide rails
- Cause: Prolonged use leading to wear of the guide rails, increasing the clearance and decreasing the stability of the slide.
- Solution: Inspect the wear level of the guide rail press plate and replace it accordingly, readjusting the clearance to the specified range.
2. Failure of the backgauge transmission
- Cause: Displacement of the key bar between the transmission shaft and the timing pulley or slippage of the timing belt.
- Solution: Reassemble the key bar and timing belt, check the electrical components for proper functioning.
3. Parallelism issues between the backgauge beam and the die centerline
- Cause: Improper installation of the timing belt.
- Solution: Adjust the "X" axis timing belt to ensure parallelism within the tolerance range and reinstall the timing belt.
4. Loose connection between the oil cylinder and the slide
- Cause: Loose nut affecting bending accuracy.
- Solution: Recheck and tighten the connection nut between the slide and the oil cylinder.
Common Hydraulic Bending Machine Failures
1. Lack of pressure in the hydraulic system
- Cause Analysis:
- Electromagnetic coil not powered or voltage mismatch.
- Stuck inserted valve or stuck main spool.
- Blockage in the damping orifice.
- Solution:
- Inspect the electrical system to ensure the electromagnetic coil is powered and the voltage meets requirements.
- Disassemble the relief valve, clean it, and reinstall it.
2. Excessive delay in the transition from rapid to slow slide movement
- Cause: Low oil level in the tank causing air suction in the upper chamber of the oil cylinder during rapid movement.
- Solution: Check the oil level in the tank to ensure it is adequate and that the filling port is not submerged.
Maintenance and Operational Optimization Recommendations for Bending Machines
1. Regular Maintenance: Regularly inspect mechanical components and the hydraulic system, including guide rails, oil cylinders, and electromagnetic coils, to keep the equipment in optimal working condition.
2. Operator Training: Ensure all operators undergo appropriate training to understand the correct operational procedures and troubleshooting methods for bending machines.
3. Use of High-Quality Replacement Parts: When replacing any worn components, use original or equivalent quality replacement parts to maintain machine performance and safety.
4. Regular Inspection and Adjustment: Before and after operations, inspect and adjust the mechanical synchronization mechanism and electrical systems to ensure all components are functioning properly.
Conclusion
By maintaining and appropriately adjusting bending machines, the issue of workpiece loosening during the bending process can be effectively resolved. Continuous technical maintenance and operational optimization will ensure the efficient operation of bending machines, enhancing production efficiency and product quality.
