Best methods for cleaning and rust prevention of pipe bending machines

Pipe bending machines operate in oily, dusty, and humid environments for extended periods. Inadequate cleaning and rust prevention can lead to mold corrosion, guide rail jamming, and hydraulic system contamination, ultimately affecting bending accuracy and equipment lifespan. The following are best practices.

Daily Cleaning – The Foundation of Rust Prevention

1. Mandatory After-Shift Procedure: After shutting down the equipment, wipe the bending die, clamping die, anti-wrinkle die, and mandrel surfaces with a lint-free cloth to remove grease and metal shavings.

2. Guide Rails and Lead Screws: Use a brush or air gun to remove chips from linear guide rails and ball screws to prevent abrasive wear.

3. Hydraulic Areas: Wipe away oil seepage from oil tanks, valve groups, and pipe joints to prevent dust from adhering and forming grease buildup.

4. Prohibited Use: Do not use wire brushes or hard scrapers to clean the working surfaces of the molds, as this may damage the surface finish.

II. Rust Prevention Treatment -Key Components Required Protection

1. Mold Rust Prevention

Before leaving get off work each day, spray a thin layer of rust-preventive oil (such as WD-40 or a dedicated mold rust inhibitor) onto all working surfaces of the molds.

Molds not used for extended periods should be cleaned, dried, soaked in rust-preventive oil, and wrapped in rust-proof paper before storage.

2. Exposed Metal Parts

For chrome-plated or exposed surfaces such as piston rods, spindle rods, and guide rails, apply a dual-purpose rust-preventive and lubricating oil once a week.

If equipment is to be shut down for more than 3 days, these surfaces should be covered with a rust-preventive film.

3. Hydraulic Oil Rust Prevention

Hydraulic oil itself contains rust-preventive additives, but these will become ineffective after emulsification or contamination. Regularly test the water content of the oil (≤0.1%), and replace it immediately if it exceeds the standard.

III. Environmental Control – Reducing Corrosion at the Source

The humidity in the pipe bending machine workshop should be controlled between 40% and 60%. A dehumidifier can be installed.

Avoid placing the equipment near corrosive air sources such as those used in pickling or electroplating processes.

In summer, after shutdown, if large temperature differences in the workshop lead to condensation, the machine should be run unloaded for 10 minutes to raise the temperature and dehumidify.

IV. Rust Prevention Plan for Long-Term Shutdown

If the equipment is to be shut down for more than one month, rust prevention measures must be implemented:

Thoroughly clean all molds and moving parts.

Apply a hard-film rust-preventive oil (which forms a transparent protective film after drying).

Remove precision parts such as mandrels and anti-wrinkle molds, immerse them in oil, and then seal them for storage.

Maintain the hydraulic system oil level, manually rotate the machine monthly or start it briefly to allow the oil film to cover the internal parts.

The key to cleaning and rust prevention of pipe bending machines is: daily cleaning of oil stains, applying a thin layer of rust-preventive oil to key parts, controlling ambient humidity, and long-term shutdown and sealing. Adhering to this method will keep your equipment looking like new for ten years.