The processing technology of the honing tube and the advantages brought by the technology

- Mar 16, 2021-

The honing tube is processed by rolling. Because the surface layer leaves the surface residual compressive stress, it helps to close the surface micro-cracks and hinder the expansion of erosion. So as to improve the surface corrosion resistance, and can delay the generation or expansion of fatigue cracks, thereby improving the fatigue strength of the honing pipe. Through roll forming, a cold work hardened layer is formed on the rolled surface, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, thereby improving the wear resistance of the inner wall of the honing tube and avoiding burns caused by grinding. After rolling, the surface roughness value is reduced, which can improve the mating properties. Rolling processing is a kind of chipless processing that uses plastic deformation of metal at room temperature to flatten the microscopic unevenness of the surface of the workpiece so as to achieve the purpose of changing the surface structure, mechanical characteristics, shape and size. Therefore, this method can achieve both smoothing and strengthening purposes at the same time, which cannot be achieved by grinding . No matter what processing method is used, there will always be fine uneven knife marks on the surface of the part, and there will be staggered fluctuations. The peak and valley phenomenon. The roughness of the honing tube can basically reach Ra ≤ 0.08 μm ; the roundness can be corrected, and the ovality can be ≤ 0.01mm . The honing tube improves the surface hardness, eliminates the stress deformation, and increases the hardness by HV ≥ 4 °; there is a residual stress layer after processing , which increases the fatigue strength by 30% ; improves the quality of the fit, reduces wear and extends the service life of the parts, but the processing costs of the parts Instead, it decreases.

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