Daily maintenance for a Wonsten CNC pipe bending machine requires inspecting the hydraulic fluid levels, greasing the carriage ways, checking the mandrel and wiper dies for galling or heavy wear, and ensuring the collet mechanism is free of metal debris. Routine cleaning prevents tooling damage and maintains tube bending accuracy.
Tube bending puts massive mechanical stress on both the machine frame and the tooling. A Wonsten CNC pipe bending machine generates immense torque to form heavy-wall pipes and aluminum profiles. If your shop ignores daily maintenance, that stress transfers directly to the bearings, hydraulic cylinders, and carriage rails, resulting in inaccurate bends and broken equipment.
Consistent maintenance is the only way to protect your investment. Below is the standard daily operating procedure for all Wonsten rotary draw and push bending machines.
Daily Tooling and Carriage Inspection
The tooling zone takes the most abuse during the bending process. Check these elements before the first tube is loaded.
- Inspect the Mandrel and Wiper Die: Look for signs of galling, scratches, or material buildup. Clean the tooling and apply the correct bending lubricant. Running a dry mandrel will break the mandrel rod and destroy the inside of the tube.
- Check the Collet: Clear any metal shavings, dust, or mill scale out of the collet. If debris builds up, the collet will slip during the push sequence, ruining the bend coordinates.
- Grease the Guide Rails: Check the linear guide rails on the carriage bed. They should have a visible, even film of lubrication. Dry rails cause the carriage motor to work harder, eventually burning out the servo.
Daily Hydraulic and Mechanical Checks
CNC pipe benders rely heavily on hydraulic pressure to clamp the pressure die and advance the mandrel.
- Monitor Hydraulic Oil Temperature: At the start of the shift, check the oil level. Mid-shift, check the oil temperature gauge. Overheating hydraulic oil degrades rapidly and causes the clamping pressure to drop, leading to wrinkled bends.
- Check Hose Fittings: Inspect the high-pressure hydraulic lines connected to the clamp die and pressure die cylinders. Look for weeping oil at the connection joints.
- Drain the Air Filter/Regulator: If your bender uses pneumatic supports, drain any water condensation from the air line traps. Moisture in the pneumatic system causes internal rusting of the valves.
End of Shift Cleanup
- Remove Tooling for Long Pauses: If the machine will be idle for several days, remove the wiper die and mandrel. Clean them and coat them in rust preventative.
- Wipe Down the Bending Head: Clean off excess bending paste, oil, and metal dust from the main bending axis and chain drives.
Protect Your Production Schedule
Bending metal is a dirty, high-friction process. Taking ten minutes a day to clear debris and check lubrication keeps your Wonsten CNC pipe bender running at exact tolerances. Skip these steps, and you will pay for it in scrapped material and emergency repair bills.Need to upgrade your current bending capabilities or order replacement tooling? Reach out to our technical team at Wonsten Group.
