Positioning device for shaft workpiece with gradient section

Abstract

The invention provides a positioning device for a shaft workpiece with a gradient section, which can clamp and position the workpiece stably. The device comprises a base, wherein a positioning structure used for clamping and positioning the shaft workpiece with the gradient section is arranged on the base; the positioning structure comprises a first sliding hole and a second sliding hole formed in the base; the long diameters of the first sliding hole and the second sliding hole are in a straight line; a first supporting shaft and a second supporting shaft which can move along the sliding holes are respectively arranged in the first sliding hole and the second sliding hole; a first roller and a second roller respectively sleeve the first supporting shaft and the second supporting shaft; a clamping part of the shaft workpiece with the gradient section is formed between the first roller and the second roller; a first pressure spring, a second pressure spring and a positioning stop block are also arranged on the base; the first pressure spring is supported between one side, back on to the second roller, of the first roller and the side wall of the first sliding hole; the second pressure spring is supported between one side, back on to the first roller, of the second roller and the side wall of the second sliding hole; the positioning stop block is arranged in the side direction of the clamping part.

Description

technical field [0001] The invention relates to a fixture, in particular to a positioning device for shaft workpieces with gradual cross-sections. Background technique [0002] A shaft is a mechanical part that supports and revolves with a rotating part to transmit motion, torque or bending moment. According to the bearing capacity of the shaft, the shaft is divided into a core shaft, a transmission shaft and a rotating shaft. Among them, the mandrel is used to support the rotating parts, which only bears the bending moment and does not transmit the torque. Therefore, in order to save material and reduce the weight of the mandrel itself, when the bending moments borne by each part of the mandrel are quite different, the variable-section shaft is usually used. The shaft with variable section adopts a larger section where the bending moment is larger and a smaller section where the bending moment is smaller. In some cases, if the cross-section of the adjacent part of the ...

AI Technical Summary

Problems solved by technology

[0003] We know that in the processing of shaft workpieces, the shaft must be milled, which requires the positioning of shaft workpieces. There are often the following problems in the processing and positioning of shafts: because this type of shaft has a gradual cross section, when positioning this type of shaft, axial movement often occurs and the positioning is unstable

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