Piles and Bushings on Steel Bar Bending Machine

Function and Precautions of Piles and Bushings on Steel Bar Bending Machine

Function

The bending piles and bushings is a key wearing part of the steel bar bending machine. When bending steel bars of different diameters:

1. It serves as the rotating support sleeve for the bending shaft, reducing friction between the bending shaft and the machine body during rotation.
2. It keeps the bending shaft stable and concentric, preventing shaft deflection when bending rebars with varying diameters, especially large-diameter steel bars that bring heavy load.
3. It bears the extrusion and shear force transferred from the bending shaft during forming, protecting the main shaft housing from direct wear.
4. When switching to bend different rebar sizes, the matched bushing ensures the bending pin runs smoothly, maintaining accurate bending angles and forming dimensions for various steel bar diameters.

Precautions

1. Select bushing materials and specifications according to the maximum diameter of steel bars to be processed. Heavy-duty bushings are required for large-diameter rebars to avoid cracking or deformation under heavy load.
2. Check lubrication regularly. Apply grease between the bushing and bending shaft before operation. Insufficient lubrication will cause overheating, rapid abrasion and shaft jamming.
3. Inspect the bushing clearance frequently. Replace the bushing in time when excessive wear leads to large clearance, which will cause unstable bending size and vibration.
4. Keep the bushing surface clean. Remove steel scraps, concrete dust and debris; foreign particles will scratch the mating surface and accelerate wear.
5. Do not overload the machine. Even with intact bushings, bending steel bars exceeding the machine’s rated diameter will cause permanent damage to the bushing and bending shaft.
6. Ensure proper installation. The bushing must be fully seated without offset, otherwise uneven stress will result in premature failure.