Device and method for detecting symmetry of key groove

Abstract

The invention discloses a device for detecting the symmetry of a key groove. The device comprises a detecting frame main body and a plurality of detecting block gauges; a guide rail is arranged on the side surface of the detecting frame main body; a concave detecting position is formed on one side, with the guide rail, of the detecting frame main body; a left positioning device and a right positioning device which are used for fixing the detecting block gauges are arranged on both sides of the concave detecting position respectively; and a dial indicator capable of parallel sliding along the position with the guide rail is arranged on the detecting frame main body. During detection of the device for detecting the symmetry of the key groove, the detecting block gauges are fixed by the left positioning device and the right positioning device, and embedded into corresponding key grooves to be detected; the dial indicator of which the moving trace is parallel to the guide rail is provided; due to the sliding of the dial indicator along the guide rail, displayed values of the dial indicator at the most highest points of shaft outer diameters to be detected are measured respectively; and a symmetry deflection value is obtained according to the two displayed values. The detection device and the detection method of the device are convenient in regulation; moreover, the measurement method is simple; the detection cost is saved and convenience is brought to detectors; and the invention is used in the field of symmetry detection.

Description

technical field [0001] The invention relates to a detection device for keyway symmetry and a method for detecting keyway symmetry through the detection device. Background technique [0002] After the keyway is machined, it is usually necessary to detect the symmetry of the keyway on both sides of the shaft. In the past, there are generally three methods for detecting the symmetry of the keyway. [0003] One of the methods is to simulate the axis of the shaft through the V-shaped block, simulate the center line of the keyway through the plug, and compare the two to obtain the symmetry value. The actual working state, but the plug needs to be leveled in this detection method, which makes the detection extremely inconvenient. [0004] The second detection method is to simulate the center line of the keyway through the contact between the flat plate and the block, calculate the axis of the shaft through the dial indicator, and then compare the two to obtain the symmetry value. ...

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Problems solved by technology

[0003] One of the methods is to simulate the axis of the shaft through the V-shaped block, simulate the center line of the keyway through the plug, and compare the two to obtain the symmetry value. The actual working state, but this detection method needs to level the plug, which makes the detection extremely inconvenient

[0004] The second detection method is to simulate the center line of the keyway through the contact between the flat plate and the plug, calculate the axis of the shaft through the dial indicator, and then compare the two to obtain the symmetry value. This detection method can easily simulate the actual working state of the key , but the contact between the block and the plate is not easy to be completely contacted by this detection method, especially for the shaft with a large diameter, the repeated measurement error is large due to gravity

[0005] The third detection method is to measure the outer circle by three-coordinate measuring equipment to obtain the axis of the shaft, measure the keyway to obtain the center line of the keyway plane, and then calculate the symmetry value by computer. This detection method can measure any axis, but This detection method cannot judge the high and low points when measuring the keyway, resulting in a large repeatability error in the case of poor surface roughness, and the detection equipment of this detection method is expensive, which is not conducive to being popularized and applied in the symmetry detection of the keyway

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