A method for detecting vector deviation of a hole forming method based on a laser step gun

Abstract

A kind of vector deviation detection method of laser step gun based hole making method, first, the standard rivet hole position is drilled and countersunk on the measured part, then a plurality of measurement points are determined in the standard rivet hole position, the concave-convex amount of the measurement points is measured by using the laser step gun, the coordinate value of the coordinate origin in the standard rivet hole position is calculated, the actual deviation value of the hole position is obtained from the coordinate value of the coordinate origin, and finally the actual deviation value of the hole position is compared with the theoretical normal line, and the vector deviation is obtained.The present application effectively solves the problem of normal value deviation measurement of rivet hole of oversized curved surface product;It can be measured in time in actual production environment, and the normal deviation value can be quickly obtained by calculation, and the measurement data is convenient for research and analysis.

Description

Technical Field

[0001] This invention relates to the field of aerospace hole inspection technology, and in particular to a hole normal deviation detection method based on a laser step gun. Background Technology

[0002] In the field of aerospace manufacturing and assembly, normal deviation is an important evaluation criterion for hole quality. Whether holes are drilled manually or using digital equipment, there is still no good method for measuring the normal deviation of holes. Currently, the best equipment for measuring normal error includes coordinate measuring machines (CMMs) and optical microscopes. However, due to size limitations, these devices cannot be used for real-time measurement on the production site. In addition, the large size of aerospace components makes them unsuitable for practical measurement. Summary of the Invention

[0003] The technical problem solved by this invention is to provide a method for detecting the deviation of the normal vector in hole making based on a laser step gun, so as to solve the problems in the background art mentioned above.

[0004] The technical problem solved by this invention is achieved by the following technical solution:

[0005] A method for detecting the normal vector deviation of a hole drilled using a laser step gun involves first drilling and countersinking standard rivet holes into the part being tested. Then, several measurement points are determined at these standard rivet holes. The unevenness or concavity of these measurement points is measured using a laser step gun. The coordinates of the origin of the standard rivet hole are then calculated. The actual deviation of the hole is obtained from the coordinates of the origin. Finally, the actual deviation is compared with the theoretical normal vector to obtain the normal vector deviation. The specific steps are as follows:

[0006] 1) Drilling and countersinking positions

[0007] Drill and countersink standard rivet holes on the part being tested;

[0008] 2) Determine the measurement point

[0009] Select three test points, A, B, and C, in the standard rivet hole positions;

[0010] 3) Measured values

[0011] The values ​​'a' corresponding to selected points A, B, and C were measured using a laser step gun. z b z c z ;

[0012] 4) Calculate the coordinates of the origin.

[0013] With the center of the hole as the origin O, and the radius of the standard gauge 3 as r, calculate a using trigonometric functions. x ay , b x , b y , c x , c y The value of r is:

[0014] a x = r, a y = 0, b x = 0, b y = r, c x = -r / 2 0.5 , c y = r / 2 0.5

[0015] Record the specific coordinate values of three measured points, i.e. point A (a x , a y , a z ), point B (b x , b y , b z ), and point C (c x , c y , c z );

[0016] Put the recorded specific coordinate values of point A (a x , a y , a z ), point B (b x , b y , b z ), and point C (c x , c y , c z ) into formula (1) for calculation to obtain the coordinate values (X, Y, Z) of the coordinate origin O:

[0017]

[0018] 5) Calculate the actual deviation value of the hole position

[0019] According to formula (2), the actual deviation value of the hole position is calculated:

[0020]

[0021] Put the coordinate values (X, Y, Z) of the coordinate origin O calculated by formula (1) into formula (2) to obtain the actual deviation value of the hole position.

[0022] 6) Detection comparison

[0023] Compare the actual deviation value of the hole position obtained with the theoretical normal line to obtain the vector deviation, so as to solve the problem of quickly detecting the rivet hole method in the production site.

[0024] In the present application, in step 2), a standard socket gauge is inserted in the standard rivet hole position, and A point, B point and C point are selected at the edge of the standard socket gauge.

[0025] In the present application, in step 2), A point and B point are spaced apart by 90°, and A point and C point are spaced apart by 135°.

[0026] Beneficial effects:

[0027] 1) The present application effectively solves the problem of normal value deviation measurement of rivet holes of oversized curved surface products;

[0028] 2) The present application can be measured in time in actual production environment, and the normal deviation value can be quickly obtained through calculation, and the measurement data is convenient for research and analysis. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a standard rivet hole position position schematic diagram in the preferred embodiment of the present application.

[0030] Figure 2 It is a standard socket gauge measurement schematic diagram in the preferred embodiment of the present application.

[0031] Figure 3 It is a standard rivet hole position origin coordinate schematic diagram in the preferred embodiment of the present application.

[0032] Figure 4 It is a measured point coordinate schematic diagram in the preferred embodiment of the present application.

[0033] Figure 5 It is a measured point interval schematic diagram in the preferred embodiment of the present application. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, purposes and effects realized by the present application easy to understand, the present application is further described below in combination with specific drawings.

[0035] Referring to Figures 1 to 5 A laser step gun based hole method vector deviation detection method is shown, and the specific steps are as follows:

[0036] 1) Drill and ream the hole position

[0037] As Figure 1 shown, a standard rivet hole position 2 is drilled and reamed on the measured part 1;

[0038] 2) Determine the measured point

[0039] Insert a standard socket gauge 3 corresponding to the diameter in the standard rivet hole position 2, and select three measured points 5 (i.e. A point, B point and C point) at the edge of the standard socket gauge 3;

[0040] 3) Measurement values

[0041] The values a, b, c corresponding to the selected A point, B point, C point are measured respectively by using the laser step gauge 4 z z z ;

[0042] 4) Calculate the coordinate origin coordinate value

[0043] Taking the hole center as the coordinate origin O, the coordinate system x-y-z direction is shown as Figure 3 , and assuming that the radius of the standard socket gauge 3 is r, the values of a, a, b, b, c, c are respectively obtained according to the trigonometric function relationship as follows: x y x y x y

[0044] a x = r, a y = 0, b x = 0, b y = r, c x = -r / 2 0.5 , c y = r / 2 0.5

[0045] Record the specific coordinate values of the three measured points, i.e. A point (a x , a y , a z ), B point (b x , b y , b z ), and C point (c x , c y , c z );

[0046] Put the recorded specific coordinate values of A point (a x , a y , a z ), B point (b x , b y , b z ), and C point (c x , c y , c z ) into formula (1) to calculate the coordinate values (X, Y, Z) of the coordinate origin O:

[0047]

[0048]

[0049] ​​​​​​​​5) calculating the actual deviation value of the hole site

[0050] According to formula (2), the actual deviation value of the hole site is calculated:

[0051]

[0052] The coordinate values (X, Y, Z) of the coordinate origin O calculated by formula (1) are brought into formula (2), and the actual deviation value of the hole site is obtained;

[0053] 6) detection comparison

[0054] The actual deviation value of the hole site obtained is compared with the theoretical normal line, and the vector deviation is obtained to solve the rivet hole method detection in the production site.

[0055] In this embodiment, in step 2), the interval between A point and B point is 90°, and the interval between A point and C point is 135°.

[0056] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A method for detecting vector deviation of a laser step gun based hole making method, characterized in that, First, drill and countersink the standard rivet hole position on the measured part, then determine several measurement points in the standard rivet hole position, measure the concave-convex amount of the measurement points by using the laser step gun, calculate the coordinate value of the coordinate origin in the standard rivet hole position, then obtain the actual deviation value of the hole position from the coordinate value of the coordinate origin, finally compare the actual deviation value of the hole position with the theoretical normal, and the vector deviation is obtained; the specific steps are as follows: 1) Drilling and countersinking hole position Drill and countersink the standard rivet hole position on the measured part; 2) Determine the measured point Select A point, B point and C point as three measured points in the standard rivet hole position; 3) Measure the value The laser step gun is used for measuring the values a, b and c of the selected points A, B and C respectively z , z , z ; 4) Calculate the coordinate value of the coordinate origin Take the hole center as the coordinate origin O, and let the standard hole gauge 3 have a radius r. According to the trigonometric function relationship, the values of a x , a y , b x , b y , and c x , c y are respectively: a x = r, a y = 0, b x = 0, b y = r, c x = -r / 2 0.5 , c y = r / 2 0.5 Record the specific coordinates of the three measured points, i.e., point A (a x a y a z Point B (b) x b y b z Point C (c) x c y c z ); The recorded A point (a x , a y , a z ), B point (b x , b y , b z ), and C point (c x , c y , c z ) are substituted into formula (1) to obtain the coordinate values (X, Y, Z) of the coordinate origin O. 5) Calculate the actual deviation value of the hole position According to formula (2), the actual deviation value of the hole position is calculated: The coordinate value (X, Y, Z) of the coordinate origin O calculated by formula (1) is brought into formula (2), and the actual deviation value of the hole position is obtained; 6) Detection comparison Compare the actual deviation value of the hole position with the theoretical normal, and the vector deviation is obtained.

2. The method according to claim 1, wherein the method is characterized by, In step 2), a standard concave-convex gauge is inserted into the standard rivet hole position, and A point, B point and C point are selected as three measured points on the edge of the standard concave-convex gauge.

3. The method according to claim 1, wherein the method is characterized by, In step 2), A point and B point are spaced apart by 90°, and A point and C point are spaced apart by 135°.

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