A Measuring System for Axle Journal Length

Abstract

The invention discloses a measuring system for axle journal length, comprising: a guide rail, which is arranged parallel to the axle center line of the axle; The interval distance value from different positions to a reference line; the driving mechanism, which generates a signal for representing the moving distance value of the laser sensor during the process of driving the laser sensor; and a data processing module, which plans a rectangular coordinate system; data processing The module calculates the abscissa of the laser sensor in the Cartesian coordinate system according to the moving distance value and the initial abscissa, and judges the first abscissa and the second abscissa of the start position and end position of the journal according to the change rule of the interval distance value. Abscissa, take the distance between the first abscissa and the second abscissa as the length of the journal. The invention adopts non-contact measurement, which reduces human errors and randomness in contact measurement, and improves work efficiency.

Description

technical field [0001] The invention relates to an axle detection system, in particular to an axle journal length measurement system. Background technique [0002] The journal length is one of the important parameters to be measured on the axle. The previous measurement method used the depth vernier caliper specified in JJG30-2002 "Universal Caliper Verification Regulations" for contact measurement, which is a manual contact measurement method. With the development of industrial automation, the axle dimension automatic measuring machine is widely used in axle dimension measurement. At present, in the automatic measuring machine of axle size, the method often used is to make a contact block or needle contact piece similar to the shape of the axle shoulder, cooperate with various displacement meters such as magnetic scale and grating scale, and use a cylinder to drive the contact piece and the axle shaft. Shoulder contact to detect journal length. In this method, the contac...

AI Technical Summary

Problems solved by technology

In this method, the contact parts will be worn to varying degrees, and the contacted axle surface also needs to be protected. The degree of fit of the contact parts and the coincidence of the measurement position are poor, and the repeatability and measurement accuracy of the measurement are not high.

When the front and rear shoulders of the axle journal have arc surfaces, the contact parts are less likely to be attached to the arc surfaces, and errors are prone to occur

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