Device for measuring diameter of large shaft working piece by non-contact-type online measurement

Abstract

The invention relates to a device for measuring the diameter of a large shaft working piece by non-contact-type online measurement, which solves problems of heavy detection tools, inconvenient operation and low measurement precision and measurement efficiency during precisely measuring a machined workpiece with large diameter. Three guide rails are arranged on a tripod head of a measurement base and connected by screws and threads; an upright post is mounted on the base and sleeved with four guide rail sliding blocks and provided with locking screws; sliding plates which are fixed on upper and lower guide rail sliding blocks have same length and provided with respective sensors connected by locking screws; two guide rail sliding blocks sleeved in the middle of the upright post are provided with sliding plates and sensors connected by locking screws; the length of sliding plates of the middle guide rail sliding blocks is smaller than the upper sliding plate and the lower sliding plate; the sensors are connected with a computer by cables; symmetric supporting seats are fixedly mounted on a calibration base, connected with a rotating shaft and provided with bearings; the center of the rotating shaft is provided with a large disc and a small disc the diameters of which are different; an adjustable-speed motor is connected with a bracket and fixed on the calibration base; the shaft of the adjustable-speed motor is connected with one end of the rotating shaft the other end of which is connected with a rotating speed coder fixed on the bracket of the calibration base; and a measurement base and the calibration base are connected by a large platform.

Description

technical field [0001] The invention relates to a device for measuring the diameter of a machining large shaft workpiece, in particular to a non-contact online measuring device for the diameter of a large shaft workpiece. Background technique [0002] With the development of large-scale mechanical equipment in the direction of complexity and precision, the inspection requirements for the processing quality of large-sized workpieces required by these equipment are also continuously increasing. For a long time, a lot of research has been done on the measurement of large diameters at home and abroad, but there has been no ideal method and instrument, especially in the machining industry, the precision measurement of large diameters has not been well resolved. [0003] For the measurement of large outer diameters, companies currently generally use direct measurement methods such as vernier calipers, outer micrometers, calipers, and π rulers. The inspection tools are heavy, incon...

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Problems solved by technology

[0004] The roller method for measuring large diameters has the advantages of small size, convenient operation, high work efficiency, and online dynamic measurement. However, there are many error factors such as relative slipping between the roller and the workpiece during the measurement process. At present, institutions such as Tianjin University and Hefei University of Technology are doing Engaged in the research of large-diameter measurement by the roller method, but in order to reduce the influence of errors and perform error compensation, the instrument structure and signal processing process are becoming more and more complicated

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