A device and method for measuring the diameter of a short busbar precision hole

Abstract

The invention relates to a device and a method for measuring diameter of a short bus precise hole. The device comprises a horizontal positioning plate and a positioning mandrel which is vertically fixed on the positioning plate. The upper side surface of the positioning mandrel is provided with two symmetrical displacement sensors for measuring the diameter of a short bus hole. Each displacement sensor comprises an elastic contact which can be inwards compressed and reset. The diameter of the short bus hole is larger than or equal with that of the positioning mandrel, and is smaller than the distance between the two contacts. An adjusting gasket for adjusting the depth of the contact into a component can sleeve the positioning mandrel. The distance between the upper surface of adjusting gasket and the contact is equal with the depth of the short bus hole in the component to be measured. According to the method and the device, by means of two displacement sensors which are in point contact with the short bus holes, the diameter of the short bus hole in the component is obtained through compression amounts of the contacts of the two displacement sensors. Simple operation and accurate measurement are realized. Data such as roundness can be quickly measured through rotating the component. Furthermore high convenience and high speed are realized.

Description

【Technical field】 [0001] The invention belongs to the field of aero-engine detection, and in particular relates to a device and method for measuring the diameter of a precision hole of a short busbar. 【Background technique】 [0002] There is a micro ring groove in one end of the nozzle part of the aero-engine combustor, such as figure 1 As shown, the geometric size is small, the precision requirement is high, the diameter tolerance of the inner hole is only 0.005mm, and the section interval is very small. A short busbar hole 8 with a diameter of R1 and a micro ring groove 9 with a diameter of R2, wherein R1<R2. At the processing site, because the short busbar hole 8 has a small protrusion relative to the miniature ring groove 9, it is difficult to accurately find the cross-sectional position of the short busbar hole 8 with a conventional caliper, so each short busbar hole has not been effectively measured. 8, the method of cross-sectional diameter size cannot obtain acc...

AI Technical Summary

Problems solved by technology

At the processing site, because the short busbar hole 8 has a small protrusion relative to the miniature ring groove 9, it is difficult to accurately find the cross-sectional position of the short busbar hole 8 with a conventional caliper, so each short busbar hole has not been effectively measured. 8, the method of cross-sectional diameter size cannot obtain accurate measurement data, the quality of parts cannot be effectively controlled, and the consistency and interchangeability of parts cannot be guaranteed.

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