Special-shaped conductor part dimension measurement method

Abstract

The invention discloses a method for measuring the dimensions of specially-shaped conductor parts, which comprises the following steps: firstly, preparing a mandrel with the corresponding diameter according to the inclination aperture of the part to be measured, wherein one end of the mandrel is provided with an inclined plane intersecting with the mandrel end face, the intersecting line of the two planes passes through the diameter of the mandrel, and the angle of the inclined plane is in accordance with the inclination angle of the central line of an inclination hole of the part to be measured; secondly, connecting a limiting plate to the mandrel end face intersecting with the inclined plane of the mandrel; thirdly, placing the part to be measured on a detecting platform, inserting the mandrel along the inclination hole of the part, using the limiting plate to cause the end face having the inclined plane of the mandrel to superpose with the end face of the inclination hole of the part to change the inclined plane of the mandrel into a plane, and leading out the intersection point, namely an imaginary point D, of the end face of the inclination hole of the part and the central line thereof; and finally, using a measuring head of a height gauge to approach the intersecting line of the mandrel end face and the inclined plane so as to measure the height dimension H of the part. The method transforms the measurement imaginary point D of the part into a measurable point so as to satisfy the space and angle dimensions of the specially-shaped conductor of an isolating switch which cannot be measured by the prior method.

Description

technical field

[0001] The invention relates to a method for measuring the size of a special-shaped conductor part, in particular to a method for measuring the size of a casting conductor in a GIS isolating switch. Background technique

[0002] As the research and development of high-voltage switch products continues to deepen, it will gradually develop into ultra-high voltage and ultra-high voltage, large-capacity, large-breaking capacity products, high-tech parameter products, and miniaturized and intelligent products. Therefore, the structural specificity of the key parts of new products has also undergone major changes, bringing new difficulties to processing and testing. For example, the isolating switch of the miniaturized 126kV GIS (gas-insulated metal-enclosed switchgear) product has about 11 types of cast aluminum inner casting conductors with special shapes. Conventional measuring tools have been unable to measure the key space length dimensions and angles. The si...

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