Non-contact type bearing ring inside diameter measurement device

Abstract

The invention relates to a non-contact type bearing ring inside diameter measurement device, which comprises a sensor mounting frame and a rotation drive mechanism; the sensor mounting frame is provided with two laser displacement sensors which are distributed at intervals in the radial direction of a bearing ring and are provided with measurement heads used for facing the inner surface of the bearing ring outwards when the laser displacement sensors are inserted into the bearing ring respectively; and the rotation drive mechanism is used for realizing relative rotation between the bearing ring to be measured and each laser displacement sensor. According to the non-contact type bearing ring inside diameter measurement device, by adopting the non-contact type laser displacement sensors to carry out measurement, a part to be measured can be effectively prevented from being scratched, and the surface integrity of the part is guaranteed; relative rotation between the bearing ring to be measured and each laser displacement sensor is realized by utilizing the rotation drive mechanism, so that the inside diameters and inside diameter change amounts of the bearing rings at different angle positions can be measured, and the measurement accuracy is effectively improved.

Description

technical field [0001] The invention relates to a device for measuring the inner diameter of a non-contact bearing ring. Background technique [0002] Bearing is a kind of high-precision mechanical parts. Its size and geometry are the main factors of bearing accuracy level. Measurement is a necessary means to judge size and geometry. At present, in the bearing processing process and its finished product measurement, most of the bearing special instruments are used to realize the measurement. Bearing-specific instruments have the advantages of simple operation, easy learning, low price, durability, and high measurement efficiency, but there are also certain limitations, as follows: [0003] (1) The cemented carbide probe used in the bearing special instrument is easy to scratch the surface of the bearing parts during the measurement process. Ordinary bearings are acceptable, but any tiny flaws in high-precision bearings will affect product quality, which is absolutely not al...

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Problems solved by technology

[0003] (1) The cemented carbide probe used in bearing special instruments is easy to cause scratches on the surface of bearing parts during the measurement process. Ordinary bearings are acceptable, but any tiny flaws in high-precision bearings will affect product quality, which is absolutely not allowed of

[0004] (2) For some thin-walled bearings, manual measurement on a special instrument, the external force of the hand has a great impact on the measurement results, which is far from meeting the measurement requirements of the bearing accuracy

[0005] (3) The indication error of special instruments is relatively large, which cannot meet the measurement requirements of some precision bearings

[0006] (4) There are many deficiencies in the use of other high-precision measuring instruments: ① contact measurement is mostly a two-point measurement method for determining the diameter, and only one diameter can be measured at a time, which cannot meet the requirements of the bearing inspection standard for parameters such as average diameter and diameter variation , and the time is long and the efficiency is low

②Contact measurement has force measurement, which also affects thin-walled bearing parts

③Contact measurement will cause different degrees of scratches on the surface of the part

④The measurement accuracy of non-contact measurement is low, limited by the measurement principle, the measurement cannot be completed for individual requirements

[0007] In the Chinese invention patent whose authorized announcement number is CN101733680B, a non-contact online measurement method of a large bearing raceway is disclosed. The laser displacement sensor installed on the CNC machine tool is used to realize the non-contact measurement of the bearing raceway, but The measurement device used in this measurement method is only equipped with a single laser displacement sensor, which can neither measure the radius of the inner and outer diameter of the bearing ring, nor can it achieve the diameter measurement of the inner and outer diameter of the bearing ring, and still cannot solve the problem of high precision. The problem of accurate measurement of the inner and outer diameters of bearing rings

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