Portable high-precision inner round hole contour error automatic measuring device

Abstract

The invention discloses a portable high-precision inner round hole contour error automatic measuring device. The device comprises a support frame fixed to the end face of a measured hole, and the support frame is provided with scale marks for centering the device of the invention preliminarily. The support frame is fixedly connected with the measured hole through an electromagnetic sucker absorbed onto the end face of the measured hole. An XY-axis displacement platform is fixed on the support frame, an ultrasonic motor is fixed on the XY-axis displacement platform, and the rotating shaft of the ultrasonic motor passes through the center hole of the XY-axis displacement platform to be fixedly connected with the upper end of the vertical rod of an inverted T-shaped measuring rod. An electric eddy current displacement sensor is arranged at one end of the horizontal rod of the measuring rod, and a counterweight device for balancing the weight of the electric eddy current displacement sensor and the weight of the horizontal rod of the measuring rod is arranged at the other end. The vertical rod of the measuring rod is equipped with a conductive slip ring which can avoid wire winding and the influence thereof on measurement when the measuring rod rotates. With the device, the contour error of an inner round hole can be measured accurately and efficiently. The device has the characteristics of being easy to carry, high in precision of measurement and work efficiency, and the like.

Description

technical field [0001] The invention relates to the measurement of the contour error of the inner circular hole, in particular to a portable high-precision automatic measuring device for the contour error of the inner circular hole. Background technique [0002] In the process of machining workpieces with inner circular holes, due to the limited manufacturing level, parameters such as inner diameter and roundness must be tested during subsequent processing procedures. This process is directly related to the production efficiency and processing quality of workpieces. The inner circular hole in a part is generally used as a matching reference, and whether its size is within the allowable range of error is one of the main criteria for judging whether the part is qualified. Therefore, accurate measurement of inner hole parameters is an important process in the manufacturing process. [0003] In terms of detection technology, there are mainly two measurement methods: contact meas...

AI Technical Summary

Problems solved by technology

At present, most of the domestic contact measurement is adopted. The traditional contact measurement method is the method of caliper measurement. This method has low measurement accuracy, is greatly affected by human factors, has low measurement efficiency, is easy to damage the product surface, and can only obtain With a single diameter size, the overall error of the round hole cannot be obtained, and the contour details of the round hole cannot be measured and inspected, which cannot meet the high-precision and automatic measurement requirements of machinery manufacturing enterprises

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