A laser measurement method for the extension and deformation of shot-peened wall panels

Abstract

This invention discloses a laser measurement method for the elongation deformation of shot-peened panels. The method proposes a laser measurement target holder structure model for shot-peened panels. By setting the laser measurement target holder structure model and the measurement data transformation coordinate system along the front and rear edges of the unfolded slab model of the shot-peened panel, a rapid measurement and analysis of the elongation deformation data of the shot-peened panel is achieved. This method simplifies the elongation measurement method for shot-peened panels. Through the precise positioning of the laser target ball by the laser measurement target holder structure, it enables rapid, efficient, and high-precision measurement and data analysis of elongation deformation data in various states of shot-peened panel processing, especially in the unfolded slab state after CNC machining and the state after shot peening, providing data support for the precise manufacturing of panels.

Description

Technical Field

[0001] This application relates to the measurement and analysis of the elongation and deformation of shot-peened wall panels in the unfolded blank state and the state after shot peening forming using a laser tracker. Background Art

[0002] Wing panels are an important component of an aircraft's aerodynamic shape and a crucial load-bearing structure. The manufacture of wing panels is one of the core technologies in aircraft development and a significant indicator of a country's aviation manufacturing technology level.

[0003] Shot peening is a moldless forming process that uses a high-speed stream of shot to deform the surface of an aircraft wing panel. It is the main forming method for aircraft wing panels and has advantages such as not requiring forming molds and having a short production preparation cycle.

[0004] The wing panel formed by shot peening is simply called shot peening panel. The processing technology of shot peening panel is to establish a slab model of the wing panel by designing the wing panel digital model and mapping the wing panel before and after unfolding. After CNC machining using the unfolded slab model, shot peening is carried out using shot peening equipment to form the final state of the product.

[0005] During the processing of shot-peened panels, various factors such as materials, CNC machining technology, ambient temperature, and shot peening forming process will affect the unfolded blank state and shot-peened strengthening state of the shot-peened panel after CNC machining. These factors will cause extension deformation along the spanning direction. In order to ensure the accurate manufacturing of the panel, it is necessary to measure the extension deformation data of the unfolded blank state and shot-peened strengthening state after CNC milling. This data is used to correct the unfolded blank CAD model in reverse, and finally achieve the accurate processing of the shot-peened panel.

[0006] Conventional measurement of panel elongation deformation involves CNC scribing lines on the side of the panel during the CNC unpacking stage. The panel elongation deformation is then measured using a handheld measuring block to compare the scribing lines with the panel's side surface, determining the position of the target ball on a laser tracker. However, this method suffers from several drawbacks. These include shallow scribing lines, large errors in comparison using a handheld measuring block, and indistinct scribing on aluminum alloy. Consequently, the traditional handheld scribing laser measurement method is time-consuming, labor-intensive, and prone to manual comparison errors, resulting in complex data analysis. Furthermore, this indirect method leads to significant errors, requiring repeated iterative reshaping of the shot-peened panel, resulting in a long development cycle, high costs, and severely impacting aircraft production and development. Summary of the Invention

[0007] To address the problems described in the background art, a laser measurement method for the elongation deformation of shot-peened panels has been invented. This method is applicable to the detection of elongation deformation of shot-peened panels in both the CNC-controlled unfolded slab state and the shot-peened strengthened state.

[0008] A laser measurement method for the elongation deformation of shot-peened wall panels includes the following steps:

[0009] 1. Arrange the measurement point set on the design digital model of the shot-peened wall panel and establish the theoretical measurement coordinate system AXIS1.

[0010] 1-1 Set n measurement points along the leading edge of the shot peening panel design model to establish the leading edge measurement point set FPT of the shot peening panel design model. The measurement points cover the root of the shot peening panel and the tip of the shot peening panel. The measurement points at the root and tip of the leading edge are marked as FPT(1) and FPT(n), respectively.

[0011] 1-2 Set n measurement points along the trailing edge of the shot peening panel design model to establish a set of measurement points BPT for the trailing edge of the shot peening panel design model. The measurement points cover the root and tip of the shot peening panel. The measurement points at the root and tip of the trailing edge are marked as BPT(1) and BPT(n), respectively.

[0012] Given the coordinates of FPT(n) (XFPT(n), YFPT(n), ZFPT(n)) and BPT(n) (XBPT(n), YBPT(n), ZBPT(n)), find the midpoint MPT1 of the design model. The coordinates of MPT1 are ((XFPT(n) + XBPT(n)) / 2, (YFPT(n) + YBPT(n)) / 2) (ZFPT(n) + ZBPT(n)) / 2);

[0013] 1-4 Based on the three points FPT(1), BPT(1) and MPT1, establish the spatial rectangular theoretical measurement coordinate system AXIS1;

[0014] 2. By designing the digital model and the mapping relationship before and after unfolding, a slab model of the shot peening plate is established. A measurement target base structure model and a measurement coordinate system AXIS2 for the slab model are then established on the slab model.

[0015] 2-1 The unfolded slab model of the shot peening panel is established by designing the digital model and mapping relationship before and after unfolding. The leading edge measurement point set FPT is mapped point by point to establish the leading edge measurement point set UFPT of the unfolded slab model. The measurement points at the leading edge root and the wingtip are marked as UFPT(1) and UFPT(n) respectively.

[0016] 2-2 The unfolded slab model of the shot peening panel is established by designing the digital model and the mapping relationship before and after unfolding. The trailing edge measurement point set BPT is mapped point by point to establish the trailing edge measurement point set UBPT of the unfolded slab model. The trailing edge root and wingtip measurement points are marked as UBPT(1) and UBPT(n) respectively.

[0017] 2-3 Taking each point of the unfolded measurement point set UFPT and UBPT as the center, draw the measurement target seat structure model on the front and rear edges of the unfolded slab model. The measurement target seat structure model is set on the front and rear edges of the unfolded slab model. Establish the unfolded slab model with the shot peening wall with the measurement target seat structure. The measurement target seat structure is a rectangular structure. A ball socket for placing the laser tracker measurement target ball is set in the center of the rectangle. A through hole for quick insertion and removal of the laser tracker measurement target ball is set in the center of the ball socket.

[0018] 2-4 Given the coordinates of UFPT(n) (XUFPT(n), YUFPT(n), ZUFPT(n)) and UBPT(n) (XUBPT(n), YUBPT(n), ZUBPT(n)), calculate the midpoint MPT2 of the unfolded slab model. The coordinates of MPT2 are ((XUFPT(n) + XUBPT(n)) / 2, (YUFPT(n) + YUBPT(n)) / 2) (ZUFPT(n) + ZUBPT(n)) / 2);

[0019] 2-5 Based on the three points UFPT(1), UBPT(1) and MPT2, establish the spatial unfolding slab model measurement coordinate system AXIS2.

[0020] 3. Using the unfolded slab model for CNC machining, measure and analyze the elongation and deformation data of the shot-peened wall panel in the unfolded slab state after CNC machining.

[0021] 3-1 The unfolded slab model is used to perform CNC machining to form the unfolded slab of the shot peening wall panel. A laser tracker is set up and the measurement is performed using the default coordinate system of the laser tracker. The measurement target ball is placed in the measurement target seat from the root to the tip of the unfolded slab state of the shot peening wall panel and the position coordinates of each measurement point NFPT(i) are measured to form the leading edge measurement point set NFPT. The measurement points at the root and tip of the leading edge are marked as NFPT(1) and NFPT(n) respectively.

[0022] 3-2 In the shot-peened panel blank state, the measurement target ball is placed in the measurement target seat from the root to the wingtip of the trailing edge to measure the coordinates of each measurement point NBPT(i) to form the trailing edge measurement point set NBPT. The measurement points at the root and wingtip of the trailing edge are marked as NBPT(1) and NBPT(n) respectively.

[0023] 3-3 Given the coordinates of NFPT(n) (XNFPT(n), YNFPT(n), ZNFPT(n)) and NBPT(n) (XNBPT(n), YNBPT(n), ZNBPT(n)), calculate the midpoint MPT3 of the unfolded slab. The coordinates of MPT3 are ((XNFPT(n) + XNBPT(n)) / 2, (YNFPT(n) + YNBPT(n)) / 2) (ZNFPT(n) + ZNBPT(n)) / 2);

[0024] 3-4 Based on the three measurement points NFPT(1), NBPT(1) and the midpoint MPT3 at the root of the front and rear edges of the shot-peened slab, a spatial rectangular slab measurement coordinate system AXIS3 is established;

[0025] 3-5 Transform the measurement point set NFPT and point set NBPT of the unfolded slab state of the CNC-machined shot-peened wall panel from the unfolded slab measurement coordinate system AXIS3 to the unfolded slab model measurement coordinate system AXIS2, and establish the front and rear edge point sets TNFPT and TNBPT of the unfolded slab state after the CNC-machined shot-peened wall panel.

[0026] 3-6 Compare and calculate the extension data of the corresponding points of the point set TNFPT, TNBPT after the shot-peened wall panel is transformed into a blank state and the front and rear edge measurement point set UFPT, UBPT of the flat plate unfolding digital model. Calculate the extension amount of each point in the unfolded blank state of the shot-peened wall panel after CNC machining.

[0027] 4. Use a slab to perform shot peening, and measure and analyze the elongation and deformation data of the shot-peened panel after shot peening strengthening.

[0028] 4-1 Shot peening is performed on the unfolded slab. The shot-peened wall panel is placed on the inspection fixture after shot peening. A laser tracker is set up and the measurement is performed using the default coordinate system of the laser tracker. The leading edge measurement of the shot-peened wall panel is performed from the root to the tip. The measurement target ball is placed in the measurement target seat to measure the position coordinates of each measurement point SFPT(i) to form the leading edge measurement point set SFPT. The measurement points at the root and tip of the leading edge are marked as SFPT(1) and SFPT(n), respectively.

[0029] 4-2 After shot peening, the trailing edge of the blasted panel is measured. The target ball is placed in the target holder from the root to the tip and the position coordinates of each measurement point SBPT(i) are measured to form the trailing edge measurement point set SBPT. The measurement points at the root and tip of the trailing edge are marked as SBPT(1) and SBPT(n), respectively.

[0030] 4-3 Given the coordinates (XSFPT(n), YSFPT(n), ZSFPT(n)) of the leading edge wingtip measurement point SFPT(n) and (XSBPT(n), YSBPT(n), ZSBPT(n)) of the trailing edge wingtip measurement point SBPT(n) after shot peening of the blast-peened panel, calculate the midpoint MPT4 of the blast-peened state. The coordinates of MPT4 are ((XSFPT(n) + XSBPT(n)) / 2, (YSFPT(n) + YSBPT(n)) / 2) (ZSFPT(n) + ZSBPT(n)) / 2);

[0031] 4-4 Based on the three measurement points SFPT(1), SBPT(1) and the midpoint MPT4 at the root of the front and rear edges of the shot-peened wall panel after shot peening, establish a spatial rectangular coordinate system AXIS4 for the measurement after shot peening.

[0032] 4-5 Transform the point sets SFPT and SBPT of the shot-peened panel after shot peening from the post-shot peening measurement coordinate system AXIS4 to the theoretical measurement coordinate system AXIS1, and establish the front and rear edge point sets TSFPT and TSBPT of the shot-peened panel after the post-shot peening state transformation.

[0033] 4-6 Compare and calculate the extension data of the corresponding points in the shot-peened wall panel after the state transformation of the shot-peened wall panel (TSFPT, TSBPT) and the design numerical model measurement point sets (FPT, BPT) to calculate the extension amount of each point in the state after shot peening of the wall panel.

[0034] The beneficial effects of this invention are as follows: This method proposes a laser measurement target holder structure model for shot-peened panels. By setting the laser measurement target holder structure model and the measurement data transformation coordinate system along the front and rear edges of the unfolded slab model of the shot-peened panel, a high-precision laser measurement and data analysis method for the deformation of shot-peened panels in the unfolded slab and shot-peened strengthening states is invented. A laser measurement method for the extension deformation of shot-peened panels realizes that the laser measurement target holder structure follows the extension deformation during the panel processing. Through the precise positioning of the laser target ball by the laser measurement target holder structure, efficient and high-precision measurement and rapid data analysis of extension deformation data in various states of shot-peened panel processing are achieved, especially in the unfolded slab state after CNC machining and the state after shot peening. This solves the technical problem of high-precision and rapid detection of extension deformation in various states of shot-peened panel processing. The application of a laser measurement method for the elongation deformation of shot-peened panels enables high-precision and rapid acquisition of elongation deformation data at each process stage of panel processing. This provides data support for efficient improvement of shot-peened panel processes and reverse compensation shaping based on measurement data and process data, reducing repeated iterative shaping of shot-peened panels, realizing rapid and precise manufacturing of shot-peened panels, shortening the development cycle of shot-peened panels, and effectively ensuring the development and production of new machines. Attached Figure Description

[0035] Figure 1 Schematic diagram of the target holder structure;

[0036] Figure 2 Digital model of wall panel design;

[0037] Figure 3 Unfold the slab model diagram;

[0038] Figure 4 Measurement diagram of the unfolded slab state of shot-peened wall panel;

[0039] Figure 5 Measurement diagram of the shot-peened wall panel in the shot-peened strengthening state;

[0040] Figure numbering explanations: 1. Target mounting structure model; 2. Shot peening panel design model; 3. Leading edge measurement point set; 4. Trailing edge measurement point set; 5. Leading edge root measurement point; 6. Trailing edge root measurement point; 7. Leading edge wingtip measurement point; 8. Trailing edge wingtip measurement point; 9. Design model midpoint; 10. Theoretical measurement coordinate system; 11. Developed slab model; 12. Target mounting structure model; 13. Leading edge measurement point set; 14. Trailing edge measurement point set; 15. Leading edge root measurement point; 16. Trailing edge root measurement point; 17. Leading edge wingtip measurement point; 18. Trailing edge wingtip measurement point; 19. Developed slab model midpoint; 20. Developed slab model measurement coordinate system; 21. Shot peening panel developed slab state. 22. Measurement target holder; 23. Leading edge measurement point set; 24. Trailing edge measurement point set; 25. Leading edge root measurement point; 26. Trailing edge root measurement point; 27. Leading edge wingtip measurement point; 28. Trailing edge wingtip measurement point; 29. ​​Midpoint of unfolded slab state; 30. Coordinate system for unfolded slab state measurement; 31. Laser tracker; 32. State of shot-peened panel after shot peening; 33. Measurement target holder; 34. Leading edge measurement point set; 35. Trailing edge measurement point set; 36. Leading edge root measurement point; 37. Trailing edge root measurement point; 38. Leading edge wingtip measurement point; 39. Trailing edge wingtip measurement point; 40. Midpoint of state after shot peening; 41. Coordinate system for state after shot peening; 42. Inspection fixture; 43. Optical path line of sight; Detailed Implementation

[0041] according to Figures 1-5 A laser measurement method for the elongation deformation of shot-peened panels, the operation steps are as follows:

[0042] 1. Arrange the leading edge measurement point set 3 and trailing edge measurement point set 4 on the design digital model 2 of the shot peening panel, and establish a theoretical measurement coordinate system 10.

[0043] 1-1 Design a digital model along the shot-peened panel. 2 Arrange four leading edge measurement points at equal intervals. 3 The measurement points cover the root and tip of the shot-peened panel. The root measurement point and the tip measurement point are marked as point 5 and point 7, respectively.

[0044] The set of measurement points at the leading edge is 3 = {{-265.69, 23.53, -0.36}, {-197.60, 363.89, 38.06}.

[0045] {-129.41, 704.47, 173.74}, {-72.71, 987.52, 382.56}}

[0046] 1-2 Four trailing edge measurement points 4 are equidistantly arranged along the shot-peened panel design model 2. The measurement points cover the root and tip of the shot-peened panel. The trailing edge root measurement point and the trailing edge tip measurement point are marked as point 6 and point 8, respectively.

[0047] The set of measurement points at the trailing edge is 4 = {{ 270.00 ,20.00 ,-0.33},{ 270.00 ,364.96 ,38.32},

[0048] { 270.00 ,705.62 ,174.39},{ 270.00 ,985.19 ,380.45}}

[0049] 1-3 Given the coordinates of the leading edge wingtip measurement point 7 (-72.71, 987.52, 382.56) and the trailing edge wingtip measurement point 8 (270.00, 985.19, 380.45), find the midpoint 9 of the design model. The coordinates of the midpoint 9 of the design model are ((-72.71+270.00) / 2, (987.52+985.19) / 2, (382.56+380.45) / 2) = (98.64, 986.36, 381.51);

[0050] 1-4 Based on the trailing edge root measurement point 6 as the origin of the coordinate system, the line connecting the trailing edge root measurement point 6 and the midpoint 9 of the design model is taken as the X-axis, and a plane is established using the trailing edge root measurement point 5, the trailing edge root measurement point 6, and the midpoint 9 of the design model as the Z-axis, thus establishing a right-space rectangular theoretical measurement coordinate system 10;

[0051] 2. By using the design model 2 of the shot peening wall panel and the mapping relationship before and after unfolding, a unfolded slab model 11 of the shot peening wall panel is established. On the unfolded slab model 11, a measurement target seat structure model 12 and a measurement coordinate system 20 of the unfolded slab model are established.

[0052] 2-1 The unfolded slab model 11 of the shot peening slab is established by using the design model 2 of the shot peening slab and the mapping relationship before and after the slab unfolds. The leading edge measurement point set 3 is mapped point by point to establish the leading edge measurement point set 13 of the unfolded slab model. The leading edge root measurement point and the leading edge wingtip measurement point are marked as point 15 and point 17, respectively.

[0053] The set of measurement points at the leading edge is 13 = {{3734.31, 23.53, -0.54}, {3802.40, 366.83, -8.45}.

[0054] {3870.59,734.54,-16.91},{3927.29,1086.94,-25.03}}

[0055] 2-2 The unfolded slab model 11 of the shot peening slab is established by designing the shot peening slab digital model 2 and mapping the unfolded slab before and after unfolding. The trailing edge measurement point set 4 is mapped point by point to establish the trailing edge measurement point set 14 of the unfolded slab model. The trailing edge root measurement point and the trailing edge wingtip measurement point are marked as point 16 and point 18, respectively.

[0056] The set of measurement points at the trailing edge is 14 = {{ 4270.00, 19.99, -0.46}, { 4270.00, 367.93, -8.47}.

[0057] { 4270.00,735.86,-16.94},{ 4270.00,1083.80,-24.96}}

[0058] 2-3 Taking each point of the front edge measurement point set 13 and the rear edge measurement point set 14 as the center, draw the measurement target seat structure model 12 on the front and rear edges of the shot peening wall plate unfolded slab model 11. The measurement target seat structure model 12 is connected to the shot peening wall plate unfolded slab model 11 on one side. The detailed structure of the measurement target seat structure model 12 is the measurement target seat structure model 1. The structure is a rectangular structure. A ball socket for placing the laser tracker measurement target ball is set in the center of the rectangle. A through hole for quick insertion and removal of the laser tracker measurement target ball is set in the center of the ball socket.

[0059] 2-4 Using the coordinates (3927.29, 1086.94, -25.03) of the leading edge wingtip measurement point 17 and (4270.00, 1083.80, -24.96) of the trailing edge wingtip measurement point 18 of the shot-peened panel unfolded slab model 11, the midpoint 19 of the unfolded slab model is determined. The coordinates of the midpoint 19 of the unfolded slab model are ((3927.29+4270.00) / 2, (1086.94+1083.80) / 2), (-25.03+(-24.96)) / 2) = (2598.64, 1085.37, -24.99);

[0060] 2-5 Using the trailing edge root measurement point 16 as the origin of the coordinate system, and the line connecting the trailing edge root measurement point 16 and the midpoint 19 of the shot-peened wall panel unfolded slab model as the X-axis, a right-hand rectangular space measurement coordinate system 20 is established with the trailing edge root measurement point 16, the leading edge root measurement point 15, and the midpoint 19 of the unfolded slab model of the shot-peened wall panel unfolded slab model.

[0061] 3. Using the unfolded slab model 11, perform CNC machining, and measure and analyze the elongation deformation data of the unfolded slab state 21 of the shot-peened wall panel after CNC machining.

[0062] 3-1 The unfolded slab model 11 is CNC machined to form the unfolded slab state 21 of the shot peening wall plate. Without affecting the line of sight 43 of the optical path, a laser tracker 31 is set up and the measurement is performed using the default coordinate system of the laser tracker 31. The measurement target ball is placed on the position coordinates of the measurement target seat 22 leading edge measurement point set 23 from the root to the tip of the unfolded slab state 21. The measurement point at the root of the leading edge and the measurement point at the tip of the leading edge are marked as point 25 and point 27, respectively.

[0063] The set of measurement points at the leading edge is 23 = {{1734.31, 23.53, -0.54}, {1802.40, 369.77, -7.29}.

[0064] {1870.59,740.64,-14.51},{1927.29,1096.06,-21.43}}

[0065] 3-2 In the shot-peened panel unfolded slab state 21, the measurement target ball is placed sequentially from the root to the wingtip at the trailing edge of the measurement target seat 22. The position coordinates of the trailing edge measurement point set 24 are as follows: the measurement point at the root of the trailing edge and the measurement point at the wingtip of the trailing edge are marked as point 26 and point 28, respectively.

[0066] The set of measurement points at the trailing edge is 24 = {{2270.00, 19.96, -0.47}, {2270.00, 370.89, -7.31}.

[0067] {2270.00,741.97,-14.54},{2270.00,1092.90,-21.37}}

[0068] 3-3 Using the coordinates (1927.29, 1096.06, -21.43) of the leading edge wingtip measurement point 27 and (2270.00, 1092.90, -21.37) of the trailing edge wingtip measurement point 28 in the unfolded state of the shot-peened panel blank, determine the midpoint 29 of the unfolded state of the shot-peened panel blank. The coordinates of the midpoint 29 of the unfolded state of the shot-peened panel blank are ((1927.29 + 2270.00) / 2, (1096.06 + 1092.90) / 2), (-21.43 + (-21.37)) = (2098.64, 1094.48, -21.40);

[0069] 3-4 Based on the measurement point 26 at the rear edge root of the shot-peened slab in state 21, the origin of the coordinate system is established. The line connecting the rear edge root measurement point 26 and the midpoint 29 of the developed slab state is used as the X-axis. A right-handed spatial right-angled coordinate system 30 for measuring the developed slab state is established with the three points: the measurement point 25 at the front edge root of the shot-peened slab, the measurement point 26 at the rear edge root of the shot-peened slab, and the midpoint 29 of the developed slab state.

[0070] 3-5 The front edge measurement point set 23 and the rear edge measurement point set 24 of the shot-peened wall panel in the unfolded slab state 21 are transformed from the unfolded slab state measurement coordinate system 30 to the unfolded slab model measurement coordinate system 20 in the 3D CAD software to establish the front and rear edge point sets TNFPT and TNBPT after the CNC machined shot-peened wall panel slab state transformation.

[0071] The leading edge point set TNFPT = {{3734.31, 22.85, -0.53}, {3801.94, 369.16, -8.50},

[0072] {3869.64,740.08,-17.04},{3925.86,1095.56,-25.23}}

[0073] The trailing edge point set TNFPT = {{4270.00, 19.99, -0.46}, {4269.54, 370.89, -8.54},

[0074] {4269.05,741.95,-17.08},{4268.58,1092.84,-25.16}}

[0075] 3-6 The point sets TNFPT and TNBPT after the measurement transformation of the shot-peened wall panel in the unfolded slab state 21 are compared with the measurement point sets 13 and 14 at the front and rear edges of the unfolded slab model 11. The extension amount is calculated by comparing the two-point distance formula. The extension deformation amount of each point in the shot-peened wall panel slab state after CNC machining is calculated, as shown in Table 1 and Table 2.

[0076] Table 1. Elongation and Deformation of Point Set 13 and Point Set TNFPT at the Leading Edge Measurement Points

[0077]

[0078] Table 2. Trailing edge measurement point set 14 and point set TNBPT extension deformation.

[0079]

[0080] 4. The slab in state 21 was shot-peened using the shot-peened wall plate, and the elongation and deformation data in state 32 after shot peening were measured and analyzed.

[0081] 4-1 The slab in the shot-peened wall plate is unfolded into state 21 and shot-peened. The shot-peened wall plate in state 32 after shot peening is placed on the inspection fixture 42. Without affecting the line of sight 43 of the optical path, the laser tracker 31 is set up and the measurement is performed using the default coordinate system of the laser tracker 31. The measurement target ball is placed in the measurement target seat 33 in state 32 after shot peening of the shot-peened wall plate from the root to the wingtip. The position coordinates of the leading edge measurement point set 34 are marked as point 36 and point 38 respectively.

[0082] The set of measurement points at the leading edge is 34 = {{-2265.69, 23.60, 8.99}, {-2197.59, 366.25, 48.97}.

[0083] {-2129.39,709.50,185.71},{-2072.70,995.61,395.21}}

[0084] 4-2 After shot peening strengthening of the wall panel, 32 Measure the trailing edge from root to wingtip. Place the measurement target ball in the measurement target seat 33 to measure the position coordinates of the trailing edge measurement point set 35. The measurement point at the root of the trailing edge and the measurement point at the wingtip of the trailing edge are marked as point 37 and point 39, respectively.

[0085] The set of measurement points at the trailing edge is 35 = {{ -1730.00, 20.05, 9.00}, { -1729.99, 367.34, 49.24}.

[0086] { -1729.99,710.67,186.37},{ -1729.98,993.25,393.10}}

[0087] 4-3 Given the coordinates of the leading edge wingtip measurement point 38 (-2072.70, 995.61, 395.21) and the trailing edge wingtip measurement point 39 (-1729.98, 993.25, 393.10) of the shot-peened panel in state 32, calculate the midpoint 40 of the shot-peened state. The coordinates of the midpoint 40 are ((-2072.70 + (-1729.98)) / 2, (995.61 + 993.25) / 2) (393.10 + 395.21) / 2) = (-1901.34, 994.43, 394.15);

[0088] 4-4 Based on the measurement point 37 at the root of the trailing edge of the shot-peened panel after shot peening (state 32), the origin of the coordinate system is established. The line connecting the root of the trailing edge measurement point 37 and the midpoint 40 of the shot-peened state is used as the X-axis. A right-handed rectangular spatial coordinate system 41 for measuring the shot-peened state after shot peening is established using the three points: the root of the leading edge measurement point 36, the root of the trailing edge measurement point 37, and the midpoint 40 of the shot-peened state.

[0089] 4-5 Transform the measurement point set 34 and the measurement point set 35 of the leading edge of the shot-peened wall panel in the shot-peened state 32 from the measurement coordinate system 41 to the theoretical measurement coordinate system 10 in the 3D CAD software to establish the transformed leading and trailing edge point sets TSFPT and TSBPT of the shot-peened wall panel in the shot-peened state 32.

[0090] The leading edge point set TSFPT = {{-265.69, 22.88, -0.62}, {-198.04, 365.62, 39.35},

[0091] {-130.34,708.96,176.08},{-74.11,995.18,385.58}}

[0092] The leading edge point set TSBPT = {{270.00, 20.00, -0.33}, {269.55, 367.29, 39.86},

[0093] {269.06,710.63,176.95},{268.61,993.24,383.64}}

[0094] 4-6 The point sets TSFPT and TSBPT after the shot-peened wall panel is transformed into state 32 after shot peening and strengthening are compared with the leading edge measurement point set 3 and trailing edge measurement point set 4. The deformation amount of each point after shot peening and strengthening is calculated by comparing the two-point distance formula. The deformation amount of each point after shot peening and strengthening of the wall panel is shown in Table 3 and Table 4.

[0095] Table 3. Elongation Deformation of Leading Edge Measurement Point Set 3 and Point Set TSFPT

[0096]

[0097] Table 4. Elongation Deformation of Trailing Edge Measurement Point Set 4 and Point Set TSBPT

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Claims

1. A laser measurement method for the elongation deformation of shot-peened wall panels, characterized in that... Includes the following steps: 1-1 The specific process of arranging the measurement point set and establishing the theoretical measurement coordinate system AXIS1 on the design digital model of the shot peening panel includes the following: 1-1-1 Set n measurement points along the leading edge of the shot peening panel design model and establish the leading edge measurement point set FPT of the shot peening panel design model. The measurement points cover the root of the shot peening panel and the tip of the shot peening panel. The measurement points at the root and tip of the leading edge are marked as FPT(1) and FPT(n), respectively. 1-1-2 Set n measurement points along the trailing edge of the shot peening panel design model and establish a set of measurement points BPT for the trailing edge of the shot peening panel design model. The measurement points cover the root and tip of the shot peening panel. The measurement points at the root and tip of the trailing edge are marked as BPT(1) and BPT(n), respectively. 1-1-3 Given the coordinates of FPT(n) (XFPT(n), YFPT(n), ZFPT(n)) and BPT(n) (XBPT(n), YBPT(n), ZBPT(n)), calculate the midpoint MPT1 of the design model. The coordinates of MPT1 are ((XFPT(n) + XBPT(n)) / 2, (YFPT(n) + YBPT(n)) / 2) (ZFPT(n) + ZBPT(n)) / 2); 1-1-4 Based on the three points FPT(1), BPT(1) and MPT1, establish the spatial rectangular theoretical measurement coordinate system AXIS1; 1-2 Establish the unfolded slab model of the shot peening plate by designing the digital model and the mapping relationship before and after unfolding, and establish the measurement target seat structure model and the measurement coordinate system AXIS2 of the unfolded slab model on the unfolded slab model, including the following specific processes: 1-2-1 The unfolded slab model of the shot peening panel is established by designing the digital model and mapping relationship before and after unfolding. The leading edge measurement point set FPT is mapped point by point to establish the leading edge measurement point set UFPT of the unfolded slab model. The measurement points at the leading edge root and the wingtip are marked as UFPT(1) and UFPT(n) respectively. 1-2-2 The unfolded slab model of the shot peening panel is established by designing the digital model and the mapping relationship before and after unfolding. The trailing edge measurement point set BPT is mapped point by point to establish the trailing edge measurement point set UBPT of the unfolded slab model. The trailing edge root and wingtip measurement points are marked as UBPT(1) and UBPT(n) respectively. 1-2-3 Taking each point of the unfolded measurement point set UFPT and UBPT as the center, draw the measurement target seat structure model on the front and rear edges of the unfolded slab model. The measurement target seat structure model is set on the front and rear edges of the unfolded slab model to establish the unfolded slab model with the shot peening wall with the measurement target seat structure. 1-2-4 Given the coordinates of UFPT(n) (XUFPT(n), YUFPT(n), ZUFPT(n)) and UBPT(n) (XUBPT(n), YUBPT(n), ZUBPT(n)), calculate the midpoint MPT2 of the unfolded slab model. The coordinates of the unfolded slab model MPT2 are ((XUFPT(n) + XUBPT(n)) / 2, (YUFPT(n) + YUBPT(n)) / 2) (ZUFPT(n) + ZUBPT(n)) / 2); 1-2-5 Based on the three points UFPT(1), UBPT(1) and MPT2, establish the spatial unfolding slab model measurement coordinate system AXIS2; 1-3 Using the unfolded slab model for CNC machining, the elongation deformation data of the shot-peened wall panel in the unfolded slab state after CNC machining is measured and analyzed; 1-4 Shot peening was performed using an unfolded slab, and the elongation and deformation data of the shot-peened wall panel after shot peening were measured and analyzed.

2. The laser measurement method for the elongation deformation of a shot-peened panel according to claim 1, characterized in that... Steps 1-3 involve CNC machining of the unfolded slab model and measuring and analyzing the elongation and deformation data of the shot-peened wall panel in the unfolded slab state after CNC machining. The specific processes include the following: 2-1 Using the unfolded slab model, CNC machining is performed to form the unfolded slab of the shot peening wall panel. A laser tracker is set up and the measurement is performed using the default coordinate system of the laser tracker. The measurement target ball is placed in the measurement target seat from the root to the tip of the unfolded slab of the shot peening wall panel to measure the position coordinates of each measurement point NFPT(i) to form the leading edge measurement point set NFPT. The measurement points at the root and tip of the leading edge are marked as NFPT(1) and NFPT(n), respectively. 2-2 On the trailing edge of the shot-peened panel, from the root to the wingtip, the measurement target ball is placed in the measurement target seat and the coordinates of each measurement point NBPT(i) are measured to form the trailing edge measurement point set NBPT. The measurement points at the trailing edge root and wingtip are marked as NBPT(1) and NBPT(n) respectively. 2-3 Given the coordinates of NFPT(n) (XNFPT(n), YNFPT(n), ZNFPT(n)) and NBPT(n) (XNBPT(n), YNBPT(n), ZNBPT(n)), calculate the midpoint MPT3 of the unfolded slab. The coordinates of the unfolded slab MPT3 are ((XNFPT(n) + XNBPT(n)) / 2, (YNFPT(n) + YNBPT(n)) / 2) (ZNFPT(n) + ZNBPT(n)) / 2); 2-4 Based on the three points NFPT(1), NBPT(1) at the root of the front and rear edges of the shot-peened slab and the midpoint MPT3 of the slab, establish a spatial rectangular slab measurement coordinate system AXIS3; 2-5 The point sets NFPT and NBPT of the unfolded slab state measurement of the CNC-machined shot-peened wall panel are transformed from the unfolded slab measurement coordinate system AXIS3 to the unfolded slab model measurement coordinate system AXIS2, and the front and rear edge point sets TNFPT and TNBPT of the unfolded slab state after the CNC-machined shot-peened wall panel are established. 2-6 The extension data of the corresponding points of the point set TNFPT and TNBPT after the shot-peened wall panel is transformed into a slab state and the corresponding points of the measurement point set UFPT and UBPT at the front and rear edges of the slab model are compared and calculated to calculate the extension amount of each point of the shot-peened wall panel in the slab state after CNC machining.

3. The laser measurement method for the elongation deformation of a shot-peened panel according to claim 1, characterized in that... Steps 1-4 involve shot peening a slab and measuring and analyzing the elongation and deformation data of the shot-peened wall panel after shot peening strengthening. The specific processes include the following: 3-1 The slab is expanded using a shot-peening wall plate for shot peening forming. The shot-peened wall plate is placed on the inspection fixture after shot peening. A laser tracker is set up and the measurement is performed using the default coordinate system of the laser tracker. The leading edge measurement of the shot-peened wall plate is performed from the root to the wingtip. The measurement target ball is placed in the measurement target seat to measure the position coordinates of each measurement point SFPT(i) to form the leading edge measurement point set SFPT. The measurement points at the root and wingtip are marked as SFPT(1) and SFPT(n) respectively. 3-2 After shot peening strengthening of the wall panel, the trailing edge measurement is carried out from the root to the wingtip. The measurement target ball is placed in the measurement target seat and the position coordinates of each measurement point SBPT(i) are measured to form the trailing edge measurement point set SBPT. The measurement points at the root and the wingtip are marked as SBPT(1) and SBPT(n) respectively. 3-3 Given the coordinates (XSFPT(n), YSFPT(n), ZSFPT(n)) of the leading edge wingtip measurement point SFPT(n) and (XSBPT(n), YSBPT(n), ZSBPT(n)) of the trailing edge wingtip measurement point SBPT(n) after shot peening of the blast-peened panel, calculate the midpoint MPT4 of the blast-peened state. The coordinates of MPT4 after shot peening are ((XSFPT(n) + XSBPT(n)) / 2, (YSFPT(n) + YSBPT(n)) / 2) (ZSFPT(n) + ZSBPT(n)) / 2); 3-4 Based on the three points SFPT(1), SBPT(1) at the root of the front and rear edges of the shot-peened wall panel after shot peening and strengthening, and the midpoint MPT4 of the shot-peened state, a spatial rectangular coordinate system AXIS4 is established after shot peening and strengthening. 3-5 Transform the point sets SFPT and SBPT of the shot-peened wall panel after shot peening from the post-shot peening measurement coordinate system AXIS4 to the theoretical measurement coordinate system AXIS1, and establish the front and rear edge point sets TSFPT and TSBPT of the shot-peened wall panel after the post-shot peening state transformation. 3-6 The extended data of the corresponding points of the shot-peened wall panel after the state measurement conversion of TSFPT and TSBPT and the design numerical model measurement points FPT and BPT are compared and calculated to calculate the extension amount of each point of the shot-peened wall panel after the state measurement conversion.

4. The laser measurement method for the elongation deformation of a shot-peened panel according to claim 1, characterized in that... In steps 1-2-3: Taking each point of the unfolded measurement point set UFPT and UBPT as the center, draw the measurement target seat structure model on the front and rear edges of the wall panel. The measurement target seat structure model is set on the front and rear edges of the wall panel. Establish the unfolded slab model of the shot-peened wall with the measurement target seat structure. The measurement target seat structure is a rectangular structure. A ball socket for placing the laser tracker measurement target ball is set in the center of the rectangle. A through hole for quick insertion and removal of the laser tracker measurement target ball is set in the center of the ball socket.

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