Endoporus measuring device

Abstract

The invention relates to an inner-hole measuring unit, which is a critical component at the testing equipment for measuring bearing inner hole in full automation or the inner of hardware cutting piece. The inner-hole measuring unit is an integrator which is formed by connecting a driver with a measuring mechanism. The measuring mechanism is composed of dynamic and static measuring benches, dynamic and static measuring heads with measuring point, a sensor, a measuring cylinder, an adjusting screw, a measuring plane, a pressing board, a crossing reed, a spring and a standard working piece; the measuring positions of the dynamic and static measuring benches are three measuring points; a change ring surface contact is a three point contact and self centering; the measuring mechanism is arranged on the dynamic and static measuring benches; the inner-hole measuring unit has the advantages of simple and compact structure, compact size, easy assembly and maintenance. The dynamic and static measuring heads are connected as a whole by the crossing reed, so that a lever measuring pivot is constant; simultaneously, the sensor which is arranged at the measuring bench can be changed along the tiny change of the measuring bench; the measuring accuracy is high and the measuring effect can not be affected. An original position automatic standard piece, a measuring protection limit and a force-measuring governing device are also arranged to ensure the safety and accuracy of the measurement.

Description

technical field [0001] The invention relates to an important key part of a detection device, in particular to an inner hole measuring device used for fully automatic measurement of the inner hole of a bearing or a precision hardware turning part. Background technique [0002] As a general precision standard part, the inner hole of the bearing is processed by turning and fine grinding. The size deviation, ellipticity deviation and taper deviation of the inner hole directly affect the assembly quality and quality of the supporting parts. In order to ensure the high-precision requirements of the bearing inner hole, it is necessary to carry out precise inspection of the bearing inner hole. Due to the high requirements for automatic measurement accuracy and high manufacturing costs, and there is no relatively mature high-precision inner hole testing equipment in China, for the mass production of precision standard parts such as bearings, domestic companies still use traditional g...

AI Technical Summary

Problems solved by technology

Due to the high requirements for automatic measurement accuracy and high manufacturing costs, and there is no relatively mature high-precision inner hole testing equipment in China, for the mass production of precision standard parts such as bearings, domestic companies still use traditional gauges and manual testing. The measurement method is time-consuming, labor-intensive, and the reliability of the detection quality is poor. Even if there are two full inspections, the quality of the inner hole of each bearing cannot be guaranteed.

[0003] Patent No. CN02218319.1 "Automatic Measuring Instrument for Bearing Inner Diameter" and Patent No. CN01244886.9 "Automatic Bearing Inner Hole Measuring and Sorting Instrument" both adopt pneumatic measuring instrument structure, which has a long detection stability time and is affected by the fluctuation of air source pressure Large, and it adopts the probe with integral plug gauge structure, which can be directly inserted into or withdrawn from the workpiece to be measured, which not only requires high cleanliness of the inner hole but also has a short service life of the probe.

[0004] Patent No. CN200410052691.6 "Automatic Bearing Dust-proof Groove Diameter Detector", although it also provides a detection machine for detecting the diameter of bearings, it is only suitable for occasions where the accuracy of the dust-proof groove diameter is not high, and all measurements Mechanisms are all on the outside of the measuring frame, with large volume and complex structure, which is difficult to adjust, and the dynamic and static measuring heads are in contact with the measured workpiece on the arc surface. The contact surface is large and only two points are in contact, so it cannot be accurately centered during measurement. , so the measurement accuracy is far from the micron-level inspection of the bearing inner hole

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