CN106017315A - Accurate optical coordinate detection method - Google Patents

Abstract

The invention discloses an accurate optical coordinate detection method, belongs to an airplane tool manufacturing technology and relates to an accurate optical coordinate detection method. The technical scheme employed by the invention is as follows: step one, a detection cursor tool is prepared, i.e., a screw rod 5 is installed at the bottom end of a detection cursor seat; step two, a positioning shaft 4 of a positioning seat 1 is inserted into a tool positioning member to-be-detected positioning hole, and the detection cursor tool is fixed on a tool; step three, detection is carried out by use of the detection cursor tool; and step four, center-point three-dimensional coordinate values of a through hole 7 in a side plane of a semicircular shaft 3 of the positioning seat 1 and center-point three-dimensional coordinate values of a second through hole 9 are measured by use of a detection optical ball. The method has the advantages of accurately fixedly detecting the center-point three-dimensional coordinates of the two ends of the positioning hole in an axial direction and improving the detection precision.

Description

A precise optical coordinate detection method

technical field

The invention relates to an accurate optical coordinate detection method, which belongs to aircraft tooling manufacturing technology and relates to an accurate optical coordinate detection method.

Background technique

After the original cursor seat of this invention is placed in the positioning hole for detecting the positioning hole of the aircraft tooling, the operator applies external force to fix it in the mounting positioning hole by hand. Since there is a manufacturing error between the outer diameter of the cursor seat positioning shaft and the inner diameter of the aircraft tooling positioning hole, it is prone to the defect that the cursor seat positioning shaft shakes in the aircraft tooling positioning hole, which reduces the detection accuracy. At the same time, the cursor ball can only detect the coordinate value of the center point at one end of the positioning hole on the part. In actual work, when some positioning hole positions are detected, it is necessary to simultaneously detect the three-dimensional coordinates of the center points of the two ends of the axis of the positioning hole. The existing cursor ball cannot accurately detect the three-dimensional coordinates of the center points of the two ends of the axis of the positioning hole, which affects the installation accuracy.

Contents of the invention

The purpose of the invention is to provide a cursor seat that can be fastened in the detection positioning hole and can accurately detect the three-dimensional coordinates of the center points of the two ends of the positioning hole in the axial direction.

The technical solution of the invention, the method adopts the following steps:

The first step: prepare the detection cursor tool: install the screw 5 at the bottom of the detection cursor seat;

Step 2: Insert the positioning shaft 4 of the positioning seat 1 into the positioning hole of the tooling positioning part to be detected, screw the nut into the screw rod 5 on the bottom surface of the tooling, so that the lower surface of the disc 6 of the positioning seat 1 and the tooling positioning part need to be detected Surface fit, fix the detection cursor tool on the tooling;

The third step: use the detection cursor tool to detect, use the detection optical ball to measure the three-dimensional coordinate values of the two through-holes 7 and the through-hole 9 on the side plane of the semicircular axis 3 of the positioning seat 1, and the obtained three-dimensional coordinate values represent the cursor direction. After subtracting the value of the axial coordinates of the shaft from the centerline of the two through holes 7 and 9 on the side plane of the semicircular shaft 3 of the positioning seat 1 to the lower surface of the disc 6, the final three-dimensional coordinates The value is the real three-dimensional coordinate value of the center point of the positioning hole to be detected on the detection plane.

The fourth step: use the detection optical ball to measure the three-dimensional coordinate values of the center points of the two through holes 7 and the three-dimensional coordinate values of the center points of the second through hole 9 on the side plane of the semicircular axis 3 of the positioning seat 1, and use the obtained two-point three-dimensional coordinates The value is calculated relative to the working surface of the tooling positioning part, and the real angle value between the central axis of the positioning hole to be detected of the tooling positioning part on the axial plane relatively parallel to the side plane of the semicircular axis 3 of the positioning seat 1 and the working surface of the tooling positioning part can be obtained .

The invention has the advantages of accurately fixing the three-dimensional coordinates of the center points at both ends of the axis direction of the detection positioning hole, and improving the detection accuracy.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural view of the positioning seat 1 of the present invention.

Fig. 3 is a schematic structural view of the lock nut 2 of the present invention.

Wherein, positioning seat 1, locking nut 2, semicircular shaft 3, positioning shaft 4, screw rod 5, disc 6, through hole 7, threaded hole 8.

detailed description

The technical solution of the invention, the method adopts the following steps:

The first step: prepare the detection cursor tool: install the screw 5 at the bottom of the detection cursor seat;

Step 2: Insert the positioning shaft 4 of the positioning seat 1 into the positioning hole of the tooling positioning part to be detected, screw the nut into the screw rod 5 on the bottom surface of the tooling, so that the lower surface of the disc 6 of the positioning seat 1 and the tooling positioning part need to be detected Surface fit, fix the detection cursor tool on the tooling;

The third step: use the detection cursor tool to detect, use the detection optical ball to measure the three-dimensional coordinate values of the two through-holes 7 and the through-hole 9 on the side plane of the semicircular axis 3 of the positioning seat 1, and the obtained three-dimensional coordinate values represent the cursor direction. After subtracting the value of the axial coordinates of the shaft from the centerline of the two through holes 7 and 9 on the side plane of the semicircular shaft 3 of the positioning seat 1 to the lower surface of the disc 6, the final three-dimensional coordinates The value is the real three-dimensional coordinate value of the center point of the positioning hole to be detected on the detection plane.

The fourth step: use the detection optical ball to measure the three-dimensional coordinate values of the center points of the two through holes 7 and the three-dimensional coordinate values of the center points of the second through hole 9 on the side plane of the semicircular axis 3 of the positioning seat 1, and use the obtained two-point three-dimensional coordinates The value is calculated relative to the working surface of the tooling positioning part, and the real angle value between the central axis of the positioning hole to be detected of the tooling positioning part on the axial plane relatively parallel to the side plane of the semicircular axis 3 of the positioning seat 1 and the working surface of the tooling positioning part can be obtained .

The present invention will be described in detail below in conjunction with the accompanying drawings.

A precise optical coordinate detection method. It relates to a fastenable cursor mount for optical detection. Including positioning seat 1 and lock nut 2. The positioning seat 1 is composed of a semicircular shaft 3, a positioning shaft 4, a screw rod 5 and a disk 6. Two through holes 7 are made on the side plane of the semicircular shaft 3 . The side plane of the semicircular shaft 3 is perpendicular to the upper surface of the disc 6 . The upper surface of the disk 6 is parallel to the lower surface. The positioning shaft 4 and the screw rod 5 are coaxial. The axes of the positioning shaft 4 and the screw rod 5 are perpendicular to the lower surface of the disc 6 . The hole centerlines of the two through holes 7 on the side plane of the semicircular shaft 3 pass through the axis lines of the positioning shaft 4 and the screw rod 5 . The axis lines of the positioning shaft 4 and the screw rod 5 are located on the side plane of the semicircular shaft 3 . The locking nut 2 is a stepped cylinder, and the center of the locking nut 2 passes through a threaded hole 8. The internal thread size of the threaded hole 8 is the same as the external thread size of the screw rod 5 of the positioning seat 1. The largest outer circular surface of the lock nut 2 is a knurled surface.

The using method of the present invention is:

1. Insert the positioning shaft 4 of the positioning seat 1 into the positioning hole of the tooling positioning part to be tested, so that the lower surface of the disc 6 of the positioning seat 1 is in contact with the testing surface of the tooling positioning part.

2. Use the detection optical ball to measure the three-dimensional coordinate values of the two through holes 7 and the through hole 9 on the side plane of the semicircular axis 3 of the positioning seat 1, and subtract the value of the axial coordinate of the cursor square axis from the obtained three-dimensional coordinate value. After removing the distance from the center line of the two through holes 7 and the through hole 9 on the side plane of the semicircular shaft 3 of the positioning seat 1 to the lower surface of the disc 6, the final three-dimensional coordinate value is the positioning of the tooling positioning piece to be detected. The real 3D coordinate value of the center point of the hole on the detection plane.

3. Use the detection optical ball to measure the three-dimensional coordinate value of the center point of the two through holes 7 and the three-dimensional coordinate value of the center point of the second through hole 9 on the side plane of the semicircular axis 3 of the positioning seat 1, and compare the obtained two-point three-dimensional coordinate values The working surface of the tooling locating part is calculated to obtain the real angle value between the central axis of the positioning hole to be detected of the tooling locating part on the axial plane relatively parallel to the side plane of the semicircular axis 3 of the positioning seat 1 and the working surface of the tooling locating part.

Claims (1)

1. a precise optical coordinate detection method, it is characterised in that the method employing following steps:

The first step: preparation detection cursor tool: install screw rod 5 in the bottom of detection light standard seat；

Second step: the locating shaft 4 of positioning seat 1 is inserted in hole, tool locating part location to be detected, by nut Screw in the screw rod 5 of frock bottom surface, make positioning seat 1 lower surface and the tool locating part of disk 6 need detection Fitting in face, detection cursor tool is fixed on frock；

3rd step: use detection cursor tool to detect, with half circular shaft of detection optical ball measurement and positioning seat 1 Two through holes 7 and the D coordinates value of through hole 9 on the side plane of 3, by gained D coordinates value wherein Representing the numerical value of the axial coordinate of cursor square shaft, on the side plane of half circular shaft 3 deducting positioning seat 1, two pass through The centerline hole of through hole 7 and through hole 9 to after the distance dimensional values of disk 6 lower surface, final three-dimensional Coordinate figure, for tool locating part location to be detected central point of hole true three-dimension coordinate figure in detection plane.

4th step: with two through holes 7 on the side plane of half circular shaft 3 of detection optical ball measurement and positioning seat 1 The central point three-dimensional coordinate numerical value of central point three-dimensional coordinate numerical value and the second through hole 9, by the two of gained three Dimensional coordinate values calculates relative to tool locating part work surface, can obtain center, hole, tool locating part location to be detected Axis works with tool locating part on the axis face of the side plane of half circular shaft 3 of positioning seat 1 opposing parallel Real angle value on face.