Barrel burnishing tool

Abstract

The invention provides a roller burnishing tool, accurately converting very small torque displacement to axial displacement, coping with a variation in pre-working diameter, causing no setting in spite of repeated use, and causing no change in a no-load position (original position). In this roller burnishing tool (10), a workpiece is inserted in a cylindrical frame (2) provided with a plurality of rollers (1) disposed for rolling compaction to perform rolling compaction working for the outer peripheral surface of the workpiece by the rollers. The roller burnishing tool (10)includes an automatic diameter correcting mechanism (E), in which the mechanism is provided with a torque converting mechanism (T) for converting the load torque received by the rollers to the axial displacement in pressing the outer peripheral surface of the workpiece by the rollers (1), thereby automatically correcting the diameter even if the pre-working dimension varies.

Description

technical field [0001] The present invention relates to a rolling tool for rolling the outer peripheral surface of a cylindrical workpiece or the inner peripheral surface of a hole and mirror-polishing it, especially relates to an automatic compensation mechanism with a built-in torque-displacement conversion mechanism Even if there is a deviation in the pre-processing dimension of the workpiece, the torque-displacement conversion mechanism can automatically compensate it in the diameter direction. Background technique [0002] Conventionally, rolling processing is known as processing for mirror-polishing a cylindrical outer peripheral surface or inner peripheral surface. Rolling processing uses rollers to crush the turning processing and drilling processing of the ultra-hard chip (chip), thereby turning the surface of the rolled workpiece (workpiece) into a mirror surface, which can be simultaneously Improvement of dimensional accuracy and surface hardening are realized, s...

AI Technical Summary

Problems solved by technology

[0006] However, the known automatic control of the tool diameter, which accurately converts small torque fluctuations to the axial direction, is only suitable for workpieces with small errors, so there is a problem that the deviation of the pre-processed diameter must be suppressed to a small amount. within tolerance

[0007] In addition, the problem with this kind of spring roller is that in the initial stage, it generates torsion itself, and cannot convert the slight torque variation to the axial direction correctly, so the pre-processed diameter must be kept consistent.

[0008] Further, there arises such a problem that in order to ensure the stable characteristics of the spring roller, it is necessary to improve the shape accuracy and the surface roughness of the outer surface, and as a result, the cost increases.

[0009] In addition, due to repeated use of the spring roller, the phenomenon of weakening of the elastic force will occur, thereby causing a change in the no-load position (original position)

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