Circular surface detection method and special inspection tool for parts with spherical surface and center hole

Abstract

The invention discloses an arc surface detection method applied to parts with spherical surfaces and center holes and a special detection tool thereof. The method is characterized by detecting according to the following principles and steps: (1) determining a theoretical position of a measurement datum point o on an arc surface to be measured; (2) determining a theoretical angle to be centralized of a part; (3) determining theoretical positions of other two measurement points on the arc surface to be measured; (4) surveying and mapping according to the size of the part and the surveying and mapping manner to calculate a vertical distance L between a central axis of the part and the datum point o; (5) manufacturing the special detection tool; and (6) setting actual detection programs. The arc surface detection method is a method for determining an arc through three points; the arc surface detection method cooperates with the special detection tool and a measuring tool to measure; the points can be accurately and rapidly found; the method can be applied to detection of finished products in workshop production process and is low in cost, high in accuracy, high in speed and extremely high in practicability; the special detection tool is unique and innovative in structure; the problems that the found points are difficult to locate and the accuracy is difficult to control when measuring the arc can be solved; the special detection tool is worthy of popularization.

Description

technical field [0001] The invention relates to a measuring method, in particular to a method for detecting an arc surface of a part with a spherical surface and a central hole and a special inspection tool thereof. Background technique [0002] In the prior art, for workpieces with arcuate surfaces, such as planetary gears used in differentials in gearboxes, the three-coordinate detection method is usually used for measurement, but the equipment relied on by the three-coordinate detection method is very expensive, not only requires constant temperature and humidity environment, and the detection speed is very slow, the operation requirements are very high, and three-dimensional modeling is also required. The accuracy of both sides is not necessarily high, and it can only be used for finished product inspection. detection is completely unrealistic. In order to speed up the detection speed and adapt to production, there was also a practice of making a spherical model for thi...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, for workpieces with arcuate surfaces, such as planetary gears used in differentials in gearboxes, the three-coordinate detection method is usually used for measurement, but the equipment relied on by the three-coordinate detection method is very expensive, not only requires constant temperature and humidity environment, and the detection speed is very slow, the operation requirements are high, and three-dimensional modeling is also required. The accuracy of both sides is not necessarily high, and it can only be used for finished product inspection. detection is completely unrealistic

In order to speed up the detection speed and adapt to production, there was also a practice of making a spherical model for this type of detection, that is, making a spherical model that matches the arc surface, and then covering the arc surface on the workpiece by the spherical model. Inspection, the accuracy of the arc surface is evaluated by visual inspection with the standard of light transmission, so the accuracy is not high and cannot meet the high standard requirements. Moreover, every time a different arc workpiece is made, a spherical surface must be produced again model, very inconvenient

Images