A special fixture for testing the surface roughness of steering knuckle

Abstract

The invention provides a special fixture for detecting surface roughness of a knuckle. The special fixture comprises a central rotating plate, two lateral rotating plates and supports. A mandrel is fixedly connected on the central rotating plate, and the knuckle sleeves the mandrel which is connected with a pressing plate. A plurality of guide holes are formed in the central rotating plate, and one guide hole is connected with a brake caliper hole of the knuckle through a positioning rod in a matched manner. The two lateral rotating plates are disposed in parallel, perpendicular to the central rotating plate and symmetrically and fixedly connected on two sides of the central rotating plate, and each lateral rotating plate is rotationally mounted on one support. Through rotation in two directions, each finished surface of the knuckle can face upwards, and a roughmeter sensor is kept horizontal and matched with a roughmeter to realize detection of surface roughness of the knuckle complicated in structure; one fixture can detect the surface roughness of multiple parts; detection results are accurate and measurable, and quality problems caused by errors of artificial judgment are eliminated.

Description

technical field [0001] The invention relates to a special fixture for detecting the surface roughness of a steering knuckle and belongs to the technical field of school supplies for students. Background technique [0002] The structure of the steering knuckle is relatively complex, and there are many processing parts and apertures. At present, it is impossible to use a roughness meter to test the roughness of the steering knuckle machined surface, because there is no special fixture to clamp and position the steering knuckle. [0003] The existing detection method of the surface roughness of the steering knuckle is to use the surface roughness comparison sample to compare the texture features of the processing surface of the steering knuckle, and determine the roughness level of the processing surface of the steering knuckle by visual inspection. [0004] 1) There are only seven types of roughness comparison samples: lathe, planer, vertical milling, flat milling, flat grind...

AI Technical Summary

Problems solved by technology

[0004] 1) There are only seven types of roughness comparison samples: lathe, planer, vertical milling, flat milling, flat grinding, external grinding, and grinding, and it is impossible to compare and judge the surface textures processed by drilling, reaming and other cutting methods

[0005] 2) The specifications of roughness comparison samples are limited, and there is a lack of standard samples of Ra2.5μm, which cannot meet the requirements of use

[0006] 3) Using the method of comparing roughness and comparing samples for detection, there are human judgment errors, and the data cannot be quantified, and there are quality risks

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