Solutions for Inaccurate Bending Angle of a CNC Tube Bender

1. Mechanical Component Wear or Loosening

Worn or damaged molds can prevent accurate pipe forming during bending.

Wear or loosening of components such as the bending arm or sliders can reduce bending precision.

Improper chain tension (sprocket and chain) can affect transmission accuracy.

Solution: Mechanical Maintenance

Inspect and replace worn molds as needed. Check the bending arm, sliders, and other components—tighten or replace worn parts. Adjust the chain tension to ensure smooth and accurate transmission.

2. Control System Issues

A damaged or loose bending angle controller or encoder can lead to inaccurate angle measurement or control.

Degraded hydraulic seals or excessively high oil temperatures can reduce hydraulic pressure control accuracy.

Malfunctions in the servo motor or its connections can cause unstable angle control.

Solution: Control System Inspection and Adjustment

Inspect the angle controller and encoder to ensure they are securely installed and functioning properly. Check the hydraulic system for seal integrity and replace seals as needed. Maintain proper oil temperature. Inspect the servo motor and its connections to confirm proper operation.

3. Operation and Setting Errors

Incorrectly set bending angles on the machine can cause inaccuracies.

Excessive bending speed may result in overshoot and angle deviation.

Solution: Optimize Operation and Settings

Verify and adjust the machine’s bending angle settings. Reduce bending speed as needed to prevent overshooting and improve accuracy.

4. Pipe Material and Process Issues

Pipe material or dimensions that do not meet specifications can cause deformation during bending.

A bending radius that is too small may lead to severe deformation, compromising angle precision.

Insufficient lubrication or improper mandrel installation can cause uneven stress during bending.

Solution: Optimize Materials and Process

Use pipe materials and dimensions that meet equipment requirements. Adjust the bending radius to avoid excessive deformation. Ensure proper lubrication and install the mandrel correctly to distribute stress evenly during bending.