Air cylinder thickness gauge

Abstract

The invention belongs to the field of machining and detection, and particularly relates to an air cylinder thickness gauge. An air cylinder is located on a V-shaped block and moves relative to a guide rail. A detection head on a detection rod is contacted with the hole wall or an air film is arranged between the detection head and the hole wall. A light emitting device is arranged on the detection head and is positioned inside or outside the hole. When the air cylinder moves, the detection rod and the detection head can rotate around a first kinematic pair and a second kinematic pair, and light spot position changes are caused. Each of the first kinematic pair and the second kinematic pair has only one rotational degree of freedom. A throttle valve, a constant pressure valve and an amplifying valve are arranged in the instrument, and the principle of gas communication and feedback is utilized. The detection rod is located in a buffer mechanism or naturally droops after disengaging from the workpiece. Compressed gas flows through the probe gas hole and the upper supporting gas hole. Instrument light spots are stable, the influence of external light intensity changes is small, the detection diameter range is wide, and manufacturing is easy. The instrument can realize non-contact measurement, and is small in frictional wear.

Description

technical field [0001] The invention belongs to the field of mechanical processing and detection, and in particular relates to a cylinder thickness gauge. Background technique [0002] When testing cylinders in the prior art, it is often necessary to put dial gauges and dial gauges into the cylinders, which are more suitable for testing cylinders with large diameters, but are not easy to detect cylinders with small diameters. And the detection resolution, precision and automation are low. In the existing detection methods, there are many contact detection methods and few non-contact detection methods. During the detection process, it is meaningful to prevent the rotation of the measuring tool in the hole, which is beneficial to the orientation of the processing error, and is meaningful for quality control. Contents of the invention [0003] The purpose of the present invention is to design a cylinder detection instrument, and to provide a mechanism to prevent the rotatio...

AI Technical Summary

Problems solved by technology

[0002] When testing the cylinder in the prior art, it is often necessary to put the dial indicator and the dial gauge into the cylinder, which is more suitable for detecting the cylinder with a large diameter, and it is not easy to detect the cylinder with a small diameter

And the detection resolution, precision and automation are low

Among the existing detection methods, there are many contact detection methods and few non-contact detection methods

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