Multi-point laser outer diameter detection method for ring piece

Abstract

The invention belongs to the technical field of metal rolling, and particularly relates to a multipoint laser outer diameter detection method for a ring piece. A multi-point laser outer diameter detection method for a ring piece comprises the specific steps that a laser ranging device is installed and comprises a plurality of laser ranging cameras located on the maximum outer diameter of the rolled ring piece and a laser ranging camera located on an axial rolling rack; the laser ranging camera is connected with the PLC; taking the intersection of the distribution circle of the laser ranging devices and the horizontal X-direction left quadrant of the main roller as an original point, determining the coordinate of each laser ranging device on the circumferential distribution circle, and along with feeding rolling of the core roller, measuring the X-direction radius of the ring piece by a laser ranging camera on a rolling rack and calculating to obtain the real-time circle center of the ring piece; and the laser ranging camera on each rotary holder rotates by a corresponding angle to accurately measure the radius, and finally the real-time roundness of the ring piece is obtained. In the rolling process of the ring piece, the diameter and the roundness of the ring piece can be obtained in real time, and a basis is provided for improving the stability and the geometric dimension precision of the rolling process of the ring piece.

Description

Technical Field

[0001] The invention belongs to the technical field of metal rolling, and in particular relates to a ring multi-point laser outer diameter detection method. Background Art

[0002] During the rolling process of large aluminum alloy ring forgings, as the core roller is fed and rolled, the curvature of each position of the ring gradually changes, and the outer diameter is uneven; as the ring grows, the center of the ring gradually changes. How to obtain the real-time ring diameter and roundness is related to the smooth and stable rolling process of large aluminum alloy ring forgings and the geometric dimensional accuracy of the ring. In the prior art, there is no method to determine the ring diameter at different positions of the workpiece in real time, conveniently and accurately. Summary of the invention

[0003] In view of the above problems, the purpose of the present invention is to provide a multi-point laser outer diameter detection method for rings, which can obtain the diameter and roundness of the rings in real time during the ring rolling process, providing a basis for improving the stability of the ring forging rolling process and the geometric dimension accuracy.

[0004] The technical solution of the present invention is: a method for detecting the outer diameter of a ring by multi-point laser, comprising the following steps:

[0005] S1: Install a laser distance measuring device, specifically including a plurality of laser distance measuring cameras located on the outer diameter of the largest rolled ring and a laser distance measuring camera installed on the axial rolling stand, and a rotating pan-tilt platform is provided below the laser distance measuring camera located on the outer diameter of the largest rolled ring;

[0006] S2: The signal output end of the laser ranging camera is connected to the signal input end of the PLC controller, and the signal output end of the PLC controller is connected to the rotating pan-tilt head;

[0007] S3: Take the intersection of the laser distance measuring device distribution circle and the horizontal X-left quadrant of the main roller as the origin (0,0), and determine the coordinates (X i, Y i ), as the core roll is fed and rolled, the laser ranging camera on the rolling stand measures the ring X-axis radius r X向 And calculate and obtain the real-time center of the ring O 动 According to O 动 At the location, the laser ranging camera on each rotating pan-tilt rotates the corresponding angle β i Accurately measure the radius r i , and finally obtain the real-time roundness of the ring.

[0008] In the step S1, the monitoring points of the n laser ranging cameras located on the rotating pan-tilt table are evenly distributed as n+2 points on the circumference of a circle of diameter D+B which is concentric with the outer diameter D of the maximum rolled ring, where D+B is the diameter of the distribution circle of the laser ranging device, and no laser ranging cameras are set at the left and right limit points of the distribution circle. The number of laser ranging cameras is n, and n≥4.

[0009] The specific process of obtaining the real-time roundness of the ring in step S3 is as follows:

[0010] S31: Establish a rectangular coordinate system with the left quadrant point as the coordinate origin O(0,0) to determine the coordinates (X i, Y i ):

[0011]

[0012] S32: Laser ranging camera i Camera rotation angle β i The determination process is:

[0013] When Y i >0, r+B / 2<(D+B) / 2, r+B / 2-X i >0,

[0014]

[0015] r+B / 2<(D+B) / 2,r+B / 2-X i <0,Y i >0,

[0016]

[0017] r+B / 2=(D+B) / 2,β i =0

[0018] When Y i <0,β i Equal to the negative angle β of the point symmetrical to the X axis;

[0019] S33: The distance from the rotation center of the laser ranging camera to the center of the ring:

[0020]

[0021] The radius error value is:

[0022]

[0023] Where D is the maximum processing diameter of the ring; D+B is the diameter of the distribution circle of the laser distance measuring device; n is the number of laser distance measuring devices; ni Number each laser ranging device; Q i n i The distance between the laser ranging device camera and the outer circle of the ring; A is the distance between the laser ranging camera and the rotation center of the rotating pan-tilt head; r i is the radius of the ring measured by the fixed laser ranging device; r is the radius of the ring measured by the follow-up laser ranging device; (X i , Y i ) is the laser distance measuring device n i The distribution location coordinates of O 动 It is the center of the ring during real-time rolling.

[0024] The technical effect of the present invention is that: the present invention sets a laser ranging camera device on the outer diameter of the maximum rolled ring and on the axial rolling frame, takes the intersection of the laser ranging device distribution circle and the horizontal X-direction left quadrant of the main roller as the origin, determines the coordinates of each laser ranging device on the circumferential distribution circle, and as the core roller is fed and rolled, the laser ranging camera on the rolling frame measures the X-direction radius of the ring and calculates and obtains the real-time center of the ring; according to the position of the real-time center of the ring, the laser ranging camera on each rotating pan-tilt rotates the corresponding angle to accurately measure the radius, and finally obtains the real-time roundness of the ring. During the ring rolling process, the present invention can obtain the diameter and roundness of the ring in real time, providing a basis for improving the stability of the ring forging rolling process and the accuracy of geometric dimensions.

[0025] The following is a further description with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The figure is a schematic diagram of the principle of a method for detecting outer diameter of a ring component by multi-point laser according to an embodiment of the present invention.

[0027] Figure 2 Schematic diagram of a laser ranging device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0028] Example 1

[0029] A method for detecting the outer diameter of a ring by multi-point laser, comprising the following steps:

[0030] S1: Install a laser distance measuring device, specifically including a plurality of laser distance measuring cameras located on the outer diameter of the largest rolled ring and a laser distance measuring camera installed on the axial rolling stand, and a rotating pan-tilt platform is provided below the laser distance measuring camera located on the outer diameter of the largest rolled ring;

[0031] S2: The signal output end of the laser ranging camera is connected to the signal input end of the PLC controller, and the signal output end of the PLC controller is connected to the rotating pan-tilt head;

[0032] S3: Take the intersection of the laser distance measuring device distribution circle and the horizontal X-left quadrant of the main roller as the origin (0,0), and determine the coordinates (X i, Y i ), as the core roll is fed and rolled, the laser ranging camera on the rolling stand measures the ring X-axis radius r X向 And calculate and obtain the real-time center of the ring O 动 According to O 动 At the location, the laser ranging camera on each rotating pan-tilt rotates the corresponding angle β i Accurately measure the radius r i , and finally obtain the real-time roundness of the ring.

[0033] In the step S1, the monitoring points of the n laser ranging cameras located on the rotating pan-tilt table are evenly distributed as n+2 points on the circumference of a circle of diameter D+B which is concentric with the outer diameter D of the maximum rolled ring, where D+B is the diameter of the distribution circle of the laser ranging device, and no laser ranging cameras are set at the left and right limit points of the distribution circle. The number of laser ranging cameras is n, and n≥4.

[0034] The specific process of obtaining the real-time roundness of the ring in step S3 is as follows:

[0035] S31: Establish a rectangular coordinate system with the left quadrant point as the coordinate origin O(0,0) to determine the coordinates (X i, Y i ):

[0036]

[0037] S32: Laser ranging camera i Camera rotation angle β i The determination process is:

[0038] When Y i >0, r+B / 2<(D+B) / 2, r+B / 2-X i >0,

[0039]

[0040] r+B / 2<(D+B) / 2,r+B / 2-X i <0,Y i >0,

[0041]

[0042] r+B / 2=(D+B) / 2,β i =0

[0043] When Yi <0,β i Equal to the negative angle β of the point symmetrical to the X axis;

[0044] S33: The distance from the rotation center of the laser ranging camera to the center of the ring:

[0045]

[0046] The radius error value is:

[0047]

[0048] Where D is the maximum processing diameter of the ring; D+B is the diameter of the distribution circle of the laser distance measuring device; n is the number of laser distance measuring devices; n i Number each laser ranging device; Q i n i The distance between the laser ranging device camera and the outer circle of the ring; A is the distance between the laser ranging camera and the rotation center of the rotating pan-tilt head; r i Laser distance measuring device i The measured ring radius; r is the ring radius measured by the follow-up laser ranging device; (X i , Y i ) is the laser distance measuring device n i The distribution location coordinates of O 动 It is the center of the ring during real-time rolling.

[0049] Example 2

[0050] The multi-point laser outer diameter detection method of a ring as described in Example 1 is used to detect the radius of the ring of the XX diameter-axial ring rolling machine. Figure 1 , Figure 2 As shown, it includes: 14 laser ranging cameras fixedly mounted on the rotating platform of the laser ranging device, and 1 follow-up laser detection device installed on the axial rolling frame and located on the X-axis line;

[0051] First, the intersection of the laser distance measuring device distribution circle and the horizontal X-direction left quadrant of the main roller is taken as the origin (0,0), and the intersection with the horizontal X-direction right quadrant is (D+B,0); due to equipment obstruction, no fixed laser distance measuring device is set at point (0,0) and point (D+B,0). Therefore, point (0,0), (X1,Y1), (X2,Y2)...(X7,Y7), (D+B,0), (X8,Y8)...(X 14 ,Y 14 ) are evenly distributed on the laser ranging distribution circle, with a spacing of 360° / (14+2)=22.5°.

[0052]

[0053] As the core roll is fed and rolled, Figure 2 The follow-up laser distance measuring device measures the X-axis radius r of the ring and the real-time center O of the ring. 动 .

[0054] The fixed laser distance measuring device n1 measures the distance of the outer circle of the ring as Q1;

[0055] Calculate and fix the laser distance measuring device n1 camera rotation center to the ring center O 动 Distance:

[0056] Then the fixed laser distance measuring device measures the radius of the ring:

[0057] r1=L1-Q1-A

[0058] Radius error value:

[0059]

[0060] Similarly, the fixed laser distance measuring device n2 measures the distance of the outer circle of the ring as Q2;

[0061] Calculate and fix the laser distance measuring device n2 camera rotation center to the ring center O 动 Distance:

[0062] Then the fixed laser distance measuring device measures the radius of the ring:

[0063] r2=L2-Q2-A

[0064] Radius error value:

[0065] ......

[0067] Fixed laser distance measuring device 14 The measured distance of the outer circle of the ring is Q 14 ;

[0068] Calculate and fix the laser distance measuring device n2 camera rotation center to the ring center O 动 Distance:

[0069] Then the fixed laser distance measuring device measures the radius of the ring:

[0070] r 14 =L 14 -Q 14 -A

[0071] Radius error value:

[0072]

[0073] Ring roundness:

[0074]

[0075] Among them, ±d is the acceptable roundness error range provided by the user;

[0076] If, ○ 圆度 -|±d|≤0

[0077] This indicates that the overall roundness of the ring meets the user's requirements;

[0078] Similarly,

[0079] △r1-|±d|≤0

[0080] △r2-|±d|≤0 ......

[0082] △r 14 -|±d|≤0

[0083] This indicates that the roundness of each laser monitoring point of the ring meets the user's requirements;

[0084] Corresponding to different r values ​​of the real-time ring, the gimbal rotation angle value β is:

[0085] r+B / 2<(D+B) / 2, r+B / 2-X1>0, then

[0086] r+B / 2<(D+B) / 2, r+B / 2-X2>0, then

[0087] r+B / 2<(D+B) / 2, r+B / 2-X3<0, then ......

[0089] r+B / 2<(D+B) / 2, r+B / 2-X7<0, then

[0090]

[0091] Where D is the maximum processing diameter of the ring; D+B is the diameter of the distribution circle of the laser distance measuring device, which is concentric with the largest ring; n is the number of laser distance measuring devices, which is 14 here; Q i is the distance between the laser distance measuring device camera and the outer circle of the ring; A is the distance between the laser distance measuring device camera and the rotation center of the rotating pan-tilt platform; r i Laser distance measuring devicei The measured ring radius; r is the ring radius measured by the follow-up laser ranging device; (X i , Y i ) is the laser distance measuring device n i The distribution location coordinates of O 动 It is the center of the ring during real-time rolling.

[0092] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A ring multi-point laser outer diameter detection method, characterized in that: The following steps are involved: S1: Install a laser distance measuring device, which specifically includes a plurality of laser distance measuring cameras located on the outer diameter of the largest rolled ring and a laser distance measuring camera installed on the axial rolling frame, and a rotating pan-tilt platform is provided below the laser distance measuring camera located on the outer diameter of the largest rolled ring; S2: The signal output end of the laser ranging camera is connected to the signal input end of the PLC controller, and the signal output end of the PLC controller is connected to the rotating pan-tilt head; S3: Take the intersection of the laser distance measuring device distribution circle and the horizontal X-left quadrant of the main roller as the origin (0,0), and determine the coordinates (X i, Y i ), as the core roll is fed and rolled, the laser ranging camera on the rolling stand measures the ring X-axis radius r X向 And calculate and obtain the real-time center of the ring O 动 According to O 动 At the location, the laser ranging camera on each rotating pan-tilt rotates the corresponding angle β i Accurately measure the radius r i , and finally obtain the real-time roundness of the ring.

2. A ring multi-point laser outer diameter detection method according to claim 1, characterized in that: In the step S1, the monitoring points of the n laser ranging cameras located on the rotating pan-tilt table are evenly distributed as n+2 points on the circumference of a circle of diameter D+B which is concentric with the outer diameter D of the maximum rolled ring, where D+B is the diameter of the distribution circle of the laser ranging device, and no laser ranging cameras are set at the left and right limit points of the distribution circle. The number of laser ranging cameras is n, and n≥4.

3. The method for detecting the outer diameter of a ring by multi-point laser according to claim 1, characterized in that: The specific process of obtaining the real-time roundness of the ring in step S3 is as follows: S31: Establish a rectangular coordinate system with the left quadrant point as the coordinate origin O(0,0) to determine the coordinates (X i, Y i ): ...... S32: Laser ranging camera i Camera rotation angle β i The determination process is: When Y i >0, r+B / 2<(D+B) / 2, r+B / 2-X i >0, r+B / 2<(D+B) / 2,r+B / 2-X i =0, r+B / 2<(D+B) / 2,r+B / 2-X i <0,Y i >0, r+B / 2=(D+B) / 2,β i =0 When Y i <0,β i Equal to the negative angle β of the point symmetrical to the X axis; S33: Distance from the rotation center of the laser ranging camera to the center of the ring: The radius error value is: Where D is the maximum processing diameter of the ring; D+B is the diameter of the distribution circle of the laser distance measuring device; n is the number of laser distance measuring devices; n i Number each laser ranging device; Q i n i The distance between the laser ranging device camera and the outer circle of the ring; A is the distance between the laser ranging camera and the rotation center of the rotating pan-tilt head; r i is the radius of the ring measured by the fixed laser ranging device; r is the radius of the ring measured by the follow-up laser ranging device; (X i , Y i ) is the laser distance measuring device n i The distribution location coordinates of O 动 It is the center of the ring during real-time rolling.

Images