Measurement method and apparatus for bearing protrusion amount under pre-loading no more than 10N

Abstract

The invention relates to a device for measuring the convex value of a bearing preloaded with less than or equal to 10 neutons, wherein a pedestal 6 is arranged on a platform 7.1 of a magnetic movement rest 7; a guide sleeve 4 is fastened on the pedestal by a bolt 5; a reference block 8 or a bearing to be measured 3 can be arranged inside the guide sleeve; a load block 2 is arranged on the reference block 8 or the bearing to be measured; a measuring head of a dial gage 1 which is arranged on a supporting arm 7.2 of the magnetic movement rest 7 is pointed at a center hole of the load block; the overall dimension of the reference block is the same as that of the bearing to be measured; the weight of the load block is consistent with the designed preload of the bearing to be measured; and the outside diameter of the reference block or the outside diameter of the bearing to be measured is slidably matched with the inside diameter of the guide sleeve. The device does not require any power source such as power, gas and so on, directly adds load blocks with different weights on the bearing, takes the weight of the load blocks as the load, and can measure the convex value of the bearing through comparison measurement with the reference block.

Description

technical field [0001] The invention belongs to the technical field of bearing detection, and in particular relates to a method and a device for measuring the protrusion amount of a bearing under the applied preload ≤ 10N. Background technique [0002] Paired bearings can greatly increase the rigidity and service life of the bearings by applying preload, and improve the stability and rotation accuracy of the system. Therefore, they are widely used in high-precision shaft systems such as precision machine tool spindles and high-speed electric spindles. [0003] Bearings used in pairs generally use angular contact ball bearings. The size of the protrusion directly affects the preload of the paired bearings, thereby affecting the rotation accuracy, stiffness, vibration, noise, etc. of the shaft system. Therefore, there is a special test for bearing protrusions. Quantitative instruments. The instrument usually adopts a pneumatic method, which requires an air source with suffici...

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Problems solved by technology

The instrument usually adopts a pneumatic method, which requires an air source with sufficient pressure at the place of use. However, this instrument is only suitable for measuring the protrusion of the bearing under a preload of not less than 20N, and cannot measure the protrusion of the bearing under a preload of ≤10N. , especially not suitable for measuring the protrusion of miniature or thin-walled bearings

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