Automatic measuring system for wall thickness and size error of workpiece

Abstract

A system for automatically measuring error of form and position for workpiece wall thickness and dimension consists of measurer including base, measuring frame, erecting parts, measuring head, rotary table, rolling wheel and device for indicating displacement; as well as electrical control system including process control microcomputer connected to measuring head, yielding mechanism, temperature sensor, control box, spacing switch, multiple control and driving circuits through interface master board and control card.

Description

Technical field [0001] The invention relates to an automatic measuring system of a device for accurately measuring the geometric dimensions of a workpiece, in particular to an automatic measuring system for accurately measuring the wall thickness and size, shape and position error of a rotating body. It is used to control the rotating body measuring device to measure the wall thickness of the workpiece, the wall thickness difference and its size, form and position error and other data. Background technique [0002] At present, the measurement of wall thickness and wall thickness difference is the core of rotating body measurement technology. In the traditional method, the coordinate method measures the inner and outer contours of the workpiece from each position, and then calculates the wall thickness, wall thickness difference, diameter, stop thickness, and bus straightness of the workpiece through calculation. The efficiency of this method is very low, far from being able to me...

AI Technical Summary

Problems solved by technology

The efficiency of this method is very low, far from meeting the requirements of this project for 3-5 minutes per piece, and the reliability is poor, and it is difficult to meet the requirements in terms of accuracy.

Poor reliability is due to the fact that the workpiece does not rotate, and when a single probe is used to measure from all directions with the coordinate method, the probe needs to cross the workpiece and make large movements, which is prone to collisions

There is also a problem of accessibility. Since the rotation angle of the rotating body of the probe around the horizontal axis is -15°~90°, some points may not be detected when measuring with the coordinate method.

The poor accuracy is because when the probe measures the inner and outer contours, the movement error of the machine is not the same during the inner and outer measurements, and the difference directly affects the measurement accuracy of wall thickness and wall thickness difference

Another disadvantage is that two analog probes that move independently are used for measurement. When the two probes move along different guide rails, there is a problem that the difference in the two motion errors will affect the measurement accuracy.

[0003] In the measurement of the straightness error of the busbar, the traditional method is to use the Z-guided rail perpendicular to the X-guided rail. In this way, the linkage between the X-direction and the Z-direction is required when measuring the straightness of the busbar. Not only the movement is complicated, the efficiency is low, and the occurrence is increased The possibility of collision also reduces the measurement accuracy

Because not only the straightness error of the X-direction and Z-direction rails will cause measurement errors, but also the asynchronous movement of the X-direction and Z-direction will also cause measurement errors

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