An on-line detection device for non-contact measuring hole and its application method

Abstract

The invention discloses an on-line detection device for non-contact measurement holes and a method of using the same, belonging to the technical field of on-line detection. The structural features of the device include a clamp, a camera, a snap ring, a bracket, a connecting rod, a laser generator and an illumination compensator; the online detection device is installed on the main shaft of the machine tool, and is calibrated at different heights by using standard hole samples to obtain the standard The relationship between the measurement error compensation value of the hole and the height is combined with the image recognition technology and the error compensation formula to solve the geometric parameters of the hole to be measured. The invention can realize the non-contact on-line detection of a large number of holes, obtain all the geometric information of the holes, eliminate the probe collision risk and repeated clamping errors brought by the contact measurement, and improve the detection efficiency.

Description

technical field [0001] The invention relates to the technical field of inspection and detection, in particular to an on-line detection device for a non-contact measuring hole and a use method thereof. Background technique [0002] With the rapid development of aviation manufacturing technology, the size of modern aircraft is getting bigger and bigger, and the shape is more and more complex. In order to improve the aerodynamic performance of the aircraft under the premise of reducing weight, more and more large composite skins are used as aircraft shape parts. The composite material skin and the metal structure inside the aircraft are first assembled together through positioning holes, and then workers use portable drills to make a large number of connection holes, and then CNC machine tools are used to spot-face the connection holes, and finally workers use pneumatic tools to spot-face the holes Rivets are driven inside to realize the reliable connection between the skin an...

AI Technical Summary

Problems solved by technology

[0004] (1) The contact probe of the three-coordinate measuring machine first needs to be lowered into the connection hole for measurement according to the theoretical hole position of the connection hole. Due to the position error introduced by the artificial hole, the probe is very likely to collide with the skin surface during the descent process. serious accident;

[0005] (2) After the measurement of the part, it is transferred to the CNC machine tool for processing. Due to the weak rigidity of the skin itself and repeated clamping errors, the position of the connecting hole will shift again, resulting in the coaxiality error of the spot facing and the connecting hole

[0006] (3) The three-coordinate measuring machine is a precision equipment, its feed speed is low, and the number of measuring points for a single hole is not less than 8

[0008] (1) The diameter of the hole is only a few millimeters, and the harsh lighting conditions at the production site seriously reduce the quality of the photo;

[0009] (2) Using the camera alone to take pictures can only get the detection results in the plane, but ignores the spatial information of the hole position

For example, the photo contains the information of the hole in the XY plane, but at the same time loses the Z coordinate information of the surface of the hole;

[0010] (3) At present, the non-contact detection equipment is large in size, and it is difficult to integrate with the spindle of the machine tool, which is not conducive to the rapid detection of a large number of hole systems

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