Device and method for measuring profile tolerance of annular dovetail groove of any axial section

Abstract

The invention discloses a device and a method for measuring the profile tolerance of an annular dovetail groove of any axial section, belonging to the technical field of machining. The device comprises a three-coordinate measuring machine, a survey probe mechanism and a rotating table, wherein the survey probe mechanism comprises a lengthening bar, a survey probe central seat, a survey probe joint and a corner piece survey probe; the lengthening bar of the survey probe mechanism is connected with one end of the survey probe joint through the survey probe central seat; the other end of the survey probe joint is connected with the corner piece survey probe; the rotating table is arranged on a workbench of the three-coordinate measuring machine; a tested workpiece is arranged on the rotating table; the lengthening bar of the survey probe mechanism is connected with the three-coordinate measuring machine through a sucking disk; and the corner piece survey probe of the survey probe mechanism is contacted with the inner molding surface of the annular dovetail groove. Due to the adoption of the device and the method, the aim of improving the processing quality and detection efficiency of the dovetail groove is fulfilled.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a device and method for measuring the profile degree of an annular dovetail groove of an arbitrary axial section. Background technique [0002] In the prior art, there are mainly two methods for measuring the profile degree of an arbitrary shaft section with an annular dovetail groove structure: [0003] (1) Impression method: Make an impression with the proofing paste at the gap (the only place) reserved for the leaves in series in the annular dovetail groove, take a slice of the impression and measure it on a universal tool microscope. The main problem of this method is that it can only measure the local area, and cannot measure the contour of the concave surface of the dovetail groove on any axial section on the entire circumference, which does not meet the design requirements, and the requirements for slices are very high, and the measurement caused ...

AI Technical Summary

Problems solved by technology

The main problem of this method is that it can only measure the local area, and cannot measure the contour of the concave surface of the dovetail groove on any axial section on the entire circumference, which does not meet the design requirements, and the requirements for slices are very high, and the measurement caused by slice sampling The error-to-tolerance is very small (such as the profile is less than 0.005mm) of the dovetail groove profile, which has constituted a non-negligible error component, the measurement accuracy is low, and it is difficult to control the processing quality of the dovetail groove

At the same time, this method has low detection efficiency and is not suitable for mass production

[0004] (2) Three-coordinate measurement method: such as figure 1 As shown, because the structural cavity of the dovetail groove is large and the mouth is small, the stylus of the coordinate measuring machine is a straight stylus, such as figure 2 As shown, although multiple stylus with different angles are selected, the complete concave profile surface cannot be touched, and there is a blind area of ​​the measuring point, so it is impossible to measure the profile of the concave profile of the dovetail groove

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