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Rolling processing of cylinders
Rolling machining is a kind of non-cutting process. At room temperature, the plastic deformation of the metal is used to flatten the surface of the workpiece so as to change the surface structure, mechanical characteristics, shape and size. Therefore, this method can achieve both photofinishing and strengthening purposes at the same time, and grinding can not be done.
No matter what processing method is used, there will always be fine, uneven knife marks on the surface of the parts, and there will be staggered peaks and valleys.
Rolling machining principle: It is a kind of pressure photofinishing process. It uses the cold plastic characteristics of the metal at room temperature, and uses the rolling pressure tool to exert certain pressure on the surface of the workpiece, so that the surface metal of the workpiece generates plastic flow and fills in the original residue. In the low concave wave Valley, The surface roughness of the workpiece is reduced. Due to the plastic deformation of the rolled surface metal, the surface tissue is cold-hardened and the grains are fine, forming a dense fiber shape, and a residual stress layer is formed. The hardness and strength are increased, thus improving the wear resistance, corrosion resistance, and cooperation of the workpiece surface. Rolling pressure is a non-cutting plastic processing method.
The non-cutting processing technology is safe, convenient, and can accurately control accuracy. Several major advantages:
1, improve the surface roughness, roughness can basically reach Ra ≤ 0.08 & amp; Micro; Around M.
2, correct roundness, ellipticity can ≤ 0.01 mm.
3, improve the surface hardness, so that the deformation of the force is eliminated, hardness increases HV ≥ 4 °
4, after processing there is a residual stress layer, increase fatigue strength by 30 %.
5, improve the quality of the match, reduce wear and tear, extend the service life of parts, but the processing cost of parts is reduced