Self-centering mandrel for machining and detection

Abstract

The invention relates to the technical field of mandrels, in particular to a self-centering mandrel for machining and detection. The self-centering mandrel solves the problem that in the prior art, due to the fact that the outer circle size of a conventional mandrel is fixed, clearance fit is usually adopted when the conventional mandrel is installed in an inner hole of a disc-shaped part, certain errors are inevitably generated, and the detection precision is reduced. The self-centering mandrel for machining and detection comprises a self-centering mandrel body, a conical cavity is formed in the self-centering mandrel body and penetrates through the two ends of the self-centering mandrel body, and a thread taper mandrel body matched with the conical cavity is arranged in the conical cavity. The thread taper mandrel body comprises a conical round rod and a screw rod which are used for being matched with the conical cavity. According to the self-centering mandrel, the outer ring of the self-centering mandrel is enlarged, and therefore the outer ring of the self-centering mandrel is completely attached to an inner hole of a gear to be detected, namely, the gap between the outer ring and the inner hole can be eliminated, and the clamping precision is improved.

Description

technical field [0001] The invention relates to the technical field of mandrels, in particular to a self-centering mandrel for processing and testing. Background technique [0002] When we use the mandrel to detect or process the disc-shaped parts, we will use the conventional mandrel. However, due to the fixed outer circle size, the conventional mandrel usually adopts a clearance fit when installed in the inner hole of the disc-shaped part, which inevitably produces A certain error will lead to a decrease in the accuracy of the detection. Contents of the invention [0003] The purpose of the present invention is to provide a self-centering mandrel for processing and testing, which solves the problem that the conventional mandrel in the prior art usually adopts a clearance fit when it is installed in the inner hole of a disc-shaped part due to the fixed outer circle size, which requires It is inevitable to generate certain errors, which will lead to the problem of reduced...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a self-centering mandrel for processing and testing, which solves the problem that the conventional mandrel in the prior art usually adopts a clearance fit when it is installed in the inner hole of a disc-shaped part due to the fixed outer circle size, which requires It is inevitable to produce certain errors, which will lead to the problem of lower detection accuracy.

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