For the design of the roll to sheet cutting machine, a variety of factors are considered, such as relevant process parameters, tool shape, parameters, rolling and cutting temperature and lubrication conditions, etc. It is proved through practice that the process requirements of the roll to sheet cutting machine are fully satisfied. So why does the roll to sheet cutting machine deform during rolling and cutting? Let me introduce it to you.
When the roll to sheet cutting machine rolls in, with the wedge-shaped blade rolling in, the steel pipe produces severe and complex deformation under the action of radial pressure. This deformation is caused by the blade edge and both sides acting on the steel pipe . The blade acting on the steel pipe mainly produces deformations such as radial compression, tangential expansion and axial extension.
The radial compression includes the radial compression of the copper tube and the radial compression of the material itself. The former refers to the reduction effect caused by the material flowing into the steel pipe, and the latter is the main deformation of the rolling and cutting. Only in this way can the steel pipe be plasticized. Shape cut off. After the knife edge rolls the workpiece, part of the material flows in the tangential direction, making the workpiece elliptical. The material at the lower part of the blade will also be deformed along the axial direction. At this time, tensile stress will be generated inside the continuous skin material, which will become the resistance of the deformation. The side of the blade acts on the steel pipe to cause deformation of the material such as radial compression, tangential expansion, axial compression and outer diameter expansion.
The radial compression and tangential expansion are similar to the deformation caused by the action of the cutting edge. Axial compression makes the Yunlian skin material at the lower part of the cutting edge produce a tensile force. The expansion of the outer diameter refers to the pressure on the incision slope. The material flows in the direction of the outer diameter of the pipe, causing the outer edge of the cutout of the workpiece to be slightly bulged and oval. All the above ellipse deformation caused by tangential expansion and outer diameter expansion. During the entire rolling and cutting process, the replacement appears continuously along the entire circumference, and it will gradually weaken as the rolling depth increases, or even close to disappear. The convex shape caused by the expansion of the outer diameter will gradually become flat under the rolling action of the supporting wheel.
The above is the relevant introduction of the reason for the deformation of the roll to sheet cutting machine during rolling and cutting, I hope it will be helpful to you.