Detection tool and method for measuring axial position size of semicircular key slot of bent shaft

Abstract

The invention discloses a detection tool and method for measuring the axial position size of a semicircular key slot of a bent shaft. The detection tool comprises a gauge block and a measure gauge, wherein the gauge block is of a flat round shape, the thickness of the gauge block is designed according to the width of the key slot, the round diameter of the gauge block is designed according to the diameter of the inner arc of the key slot, when the gauge block is put into the key slot, an arc of the gauge block is in contact with two sides of the inner arc of the key slot to realize V-shaped positioning, and a central line of the gauge block in the vertical direction overlaps a central line of the inner arc of the key slot; and the measure gauge is a cylinder with a through end and a stop end, the diameters of the through end and the stop end are determined according to the outer diameters of the semicircular key slot, a measurement reference surface and the gauge block, and the gauge block and the measure gauge are matched in use so as to determine whether the size of a detected component from the center of the semicircular key slot to the reference surface meets the drawing requirements. When the technical scheme of the invention is used for measuring the axial position size of the semicircular key slot of the bent shaft, the measurement cost is low, the measurement accuracy is high, an operation method is simple, and the detection efficiency is high.

Description

technical field [0001] The invention relates to a crankshaft processing testing tool, in particular to a testing tool for measuring the axial position and size of a semicircular keyway of a crankshaft, including a gauge block and a plug gauge. [0002] The present invention also relates to a detection method using the detection tool for measuring the axial position dimension of the semicircular keyway of the crankshaft. Background technique [0003] It is usually necessary to process a semicircular keyway at the installation journal of the pulley at the front end of the crankshaft. The processing requirements for the semicircular keyway on the part drawing generally have requirements such as the width, depth, symmetry, and axial position of the keyway. [0004] At present, there are related detection methods for the detection of the width, depth, and symmetry of the semicircular keyway, but there is no convenient detection method for the axial position and dimension detecti...

AI Technical Summary

Problems solved by technology

[0005] The above two detection methods are time-consuming and labor-intensive and have large measurement errors: (1) Three-coordinate detection is troublesome to operate

The bottom surface of the semicircular keyway is in the shape of an arc, and the space is narrow. It is time-consuming and inconvenient for the probe to find a point on the inner arc.

(2) The measurement method of the platform and the height gauge has a large error. Draw a line at the upper and lower positions of the slot opening and compare to determine the position and size of the intersection line between the arc of the slot and the outer circle of the journal, and the measurement error is relatively large.

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