Zinc steel guardrail punching machine Pipe bending is the same as sheet bending. In the case of pure bending, when the pipe with outer diameter D and wall thickness t bends under the action of external force moment M, the pipe wall outside the neutral layer is subject to tensile stress σ 1, the pipe wall becomes thinner; Tensile stress of inner pipe wall of neutral layer σ 1, the pipe wall becomes thicker. Moreover, the shape of the cross section changes from a circle to an approximate ellipse due to the resultant forces F1 and F2. When the deformation is too large, cracks will appear on the outer tube wall and wrinkles will appear on the inner tube wall.

When cutting large diameter pipes, the use of a grinding wheel saw consumes a lot of energy and increases the working hours. But for guardrail pipe Punching machine For example, the pipe cutting frequency remains unchanged, and only the length of the rocker push rod needs to be adjusted. According to the test, a well sharpened blade can cut a diameter of 18mm under normal use × 70000 1.5mm tubes, and more than 500 pieces can be cut by one grinding wheel saw blade, that is, the service life of the cutter is 140 times that of the grinding wheel blade, and its price is only 5 times that of it. Therefore, zinc steel Guardrail punching machine The production cost has also been greatly reduced.

The support roller of the punching machine for zinc steel guardrail swings back and forth during the bending process. The included angle between the steel pipe of the punching machine and the horizontal plane is usually designed to be zero. Due to processing and manufacturing errors and various elastic deformations during the bending process, the included angle cannot be ideal zero. When the bend moves forward, the forward deformation of the support roller will increase, and the included angle will also increase. When the steel pipe bends forward or backward Aluminum alloy punching machine The elbow support roller swings back and forth during operation.