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In mechanical processing, rolling processing is often used to improve the surface hardness, fatigue resistance and wear resistance of the workpiece, reduce the surface roughness of the workpiece, and extend the service life of the workpiece. At the same time,…

There are many methods for turning slender rods. Generally, the forward tool turning or the counter tool turning is carried out by using the heel tool holder. However, reverse tool turning has many advantages over forward tool turning, and most…

1) Drum-shaped        That is, after turning, the diameter of both ends of the workpiece is small, and the middle diameter is large. The reason for this defect is due to the poor rigidity of the slender shaft,…