A digital real-time welding angular deformation measuring device and a measuring method thereof suitable for a "cross" or "T" piece

Abstract

The application relates to a digital real-time welding angle deformation measuring instrument suitable for a 'cross' or 'T-shaped' piece and a measuring method thereof, and relates to the technical field of welding angle deformation measurement. The application aims to solve the problems of excessive human error in industrial welding angle deformation measurement, time-consuming measurement, real-time deformation measurement, and the problem that the existing welding angle deformation measuring instrument can only measure single-plane welding pieces. The method is as follows: analog quantity is introduced into an analog quantity conversion 485 module to give the analog quantity device address; a single-chip microcomputer and an RS485 module and the RS485 module and the analog quantity conversion 485 module are connected to form a channel; the analog quantity is successfully introduced into the single-chip microcomputer by adopting a modbus protocol; and finally, the calculation result of the single-chip microcomputer is displayed on a 1602 LCD. The application can obtain a digital real-time welding angle deformation measuring instrument suitable for a 'cross' or 'T-shaped' piece and a measuring method thereof.

Description

Technical Field

[0001] This invention relates to the field of welding angle deformation measurement technology, specifically to a digital real-time welding angle deformation measuring instrument and its measurement method suitable for "cross" or "T" shaped parts. Background Technology

[0002] Welding is a rapid prototyping method involving localized heating. The weld area is instantly melted, forming a molten pool of a specific shape. During the cooling process, when the compressive plastic deformation zone is asymmetrically distributed on the neutral plane, angular deformation occurs. Angular deformation is a welding defect that adversely affects both the static and dynamic mechanical properties of the welded structure. Therefore, the industry has long been committed to controlling weld angular deformation. Simple angular deformation tests on butt joints can be obtained using steel rulers, knife-edge squares, CAD scanning analysis, etc., but these require calculations using geometric formulas, making it difficult to guarantee accuracy and suitable for real-time angular deformation testing during the welding process.

[0003] Currently, numerous methods exist for measuring weld corner deformation in industry, such as finite element analysis, manual tracing and cosine theorem calculation, and electronic scanning followed by tracing measurement using drawing software. While these methods are feasible, they are time-consuming and lack precision. They are sufficient for small-scale experimental data collection but fall short for large-scale experimental analysis. Currently, there are no tools on the market that can directly measure weld corner deformation; therefore, this technological invention fills this market gap. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of excessive human error in measuring the angular deformation of industrial welds, the time-consuming measurement, and the real-time measurement of deformation, as well as the problem that existing weld angular deformation measuring instruments can only measure single-plane welded parts. The invention provides a digital real-time weld angular deformation measuring instrument and its measurement method suitable for "cross" or "T" shaped parts.

[0005] A digital real-time welding angular deformation measuring instrument suitable for "cross" or "T" type parts includes optical axis 1 2, profile 4, optical axis 2 8, 6 laser displacement sensors 9, lead screw a11, cross welding plate 17 and lead screw b18;

[0006] The profile 4 is a "U" shaped structural component. A cross welding plate 17 is provided on the bottom frame of the profile 4, and the cross welding plate 17 is fixed by a clamp. One side of the top frame of the profile 4 is side A 19, and the other side of the top frame of the profile 4 is side B 20. Two optical axis supports 1 are provided on side A 19. Both ends of the first optical axis 2 are set in the through holes of the optical axis support 1. An optical axis nut seat 3 is provided on the first optical axis 2. A lead screw support a6 is provided on the top of the optical axis nut seat 3. An optical axis support 7 is provided on the top of the lead screw support a6. The lead screw support a6 and the optical axis support 7 are provided with through holes.

[0007] Two lead screw supports b13 are provided on side B 20. The lead screw supports b13 are provided with internal threads. One end of the lead screw b18 is threadedly connected to one lead screw support b13, and the other end of the lead screw b18 is threadedly connected to the other lead screw support b13. The end of the other end of the lead screw b18 is connected to the rotating mechanism a14. A threaded seat 21 is provided on the lead screw b18. The threaded seat 21 is provided with internal threads. The external threads of the lead screw b18 are threadedly connected to the internal threads of the threaded seat 21. A lead screw support a6 is provided on the top of the threaded seat 21. An optical axis support 7 is provided on the top of the lead screw support a6. The lead screw support a6 is provided with internal threads, and the optical axis support 7 is provided with a through hole.

[0008] One end of the lead screw a11 passes through the through hole of the lead screw support a6 on side A 19, and the other end of the lead screw a11 is threadedly connected to the internal thread of the lead screw support a6 on side B 20. The other end of the lead screw a11 is connected to the rotating mechanism b12. One end of the second optical axis 8 passes through the through hole of the optical axis support 7 on side A 19, and the other end of the second optical axis 8 passes through the through hole of the optical axis support 7 on side B 20. The second optical axis 8 is arranged parallel to the lead screw a11, and the lead screw a11 is arranged perpendicular to the lead screw b18.

[0009] The upper part of the connecting plate b10 is provided with a through hole, and the lower part of the connecting plate b10 is provided with a threaded hole. The through hole of the upper part of the connecting plate b10 is fitted onto the No. 2 optical axis 8, and the threaded hole of the lower part of the connecting plate b10 is threadedly connected to the lead screw a11. Three laser displacement sensors 9 are respectively provided on the two ends of the connecting plate b10, and the laser displacement sensors 9 on the two ends of the connecting plate b10 are symmetrically arranged.

[0010] The output terminals of the six laser displacement sensors 9 are all electrically connected to the input terminals of the analog-to-485 module. The output terminals of the analog-to-485 module are electrically connected to the input terminals of the RS485 module. The output terminals of the RS485 module are electrically connected to the input terminals of the microcontroller. The output terminals of the microcontroller are electrically connected to the input terminals of the display screen.

[0011] A measurement method for a digital real-time welding angular deformation measuring instrument suitable for "cross" or "T" shaped parts, comprising the following steps:

[0012] 1. Place the digital real-time welding angle deformation measuring instrument on a horizontal surface, place the universal level on pressure clamp 15 and pressure clamp 26, and adjust the digital real-time welding angle deformation measuring instrument to be horizontal; place one of the right-angled sides of the cross welding plate 17 in pressure clamp 15 and pressure clamp 26, and clamp pressure clamp 15 and pressure clamp 26 to fix the cross welding plate 17.

[0013] 2. By rotating handles 2 and 1 respectively, position the six laser displacement sensors 9 directly above the cross-shaped welding plate 17; plug in the power supply, import the analog quantities measured by the six laser displacement sensors 9 into the analog-to-485 converter module, assign addresses to the analog devices, convert the TTL-to-USB serial port mode of the STC89C52 microcontroller to the 485 serial port mode, connect the microcontroller and the RS485 module to form a path, connect the RS485 module and the analog-to-485 converter module to form a path, and successfully import the analog quantities into the STC89C52 microcontroller using the Modbus protocol. Finally, display the calculation results of the STC89C52 microcontroller on the 1602 LCD screen.

[0014] The beneficial effects of this invention are:

[0015] (1) The present invention can directly hit the laser beam onto the plane of the welding workpiece to measure the angular deformation. With high precision measurement, it can perform real-time measurement, solving the problems of excessive human error in industrial welding angular deformation measurement, measurement time consumption, and real-time deformation measurement.

[0016] (2) This study can be used to test the welding angle deformation of welded structures at any time during or after welding. It is a non-contact measurement system that can be mounted on a welding robot system without interfering with the welding process. At the same time, it directly provides the angle deformation test results. The equipment is portable, highly accurate, and widely applicable.

[0017] (3) The potential application of this invention is in the welding production line or in the welding component of large T-shaped plates and cross-shaped plates, as a digital testing system to assist in optimizing the welding process.

[0018] (4) After observing the actual phenomenon of the components, it was found that some plates would warp up after welding. The line segment formed by the order of warping is not a linear straight line, but a curve. This patent mainly uses the fitting curve to find the angle value of four specified points and calculates the average value of the angle values ​​of the five points to reduce the error of the angle to be found.

[0019] (5) The present invention has high measurement accuracy, can realize real-time measurement, has a simple and easy operation process, short measurement time, and can perform large-scale measurement.

[0020] This invention provides a digital real-time welding angular deformation measuring instrument and its measurement method suitable for "cross" or "T" shaped parts. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a digital real-time welding angular deformation measuring instrument applicable to "cross" or "T" shaped parts according to the present invention. 1 is the optical axis support, 2 is optical axis No. 1, 3 is the optical axis nut seat, 4 is the profile, 5 is the connecting plate a, 6 is the lead screw support a, 7 is the optical axis support, 8 is the optical axis No. 2, 9 is the laser displacement sensor, 10 is the connecting plate b, 11 is the lead screw a, 12 is the rotating mechanism b, 13 is the lead screw support b, 14 is the rotating mechanism a, 15 is the No. 1 pressure clamp, 16 is the No. 2 pressure clamp, 17 is the cross welding plate, 18 is the lead screw b, 19 is side A, 20 is side B, and 21 is the threaded seat.

[0022] Figure 2 Simplify the simulation diagram for the model.

[0023] Figure 3 It is an RS485 module.

[0024] Figure 4 It is an STC89C52 microcontroller.

[0025] Figure 5 For fans.

[0026] Figure 6 This is an analog-to-Austria module.

[0027] Figure 7 It is a miniature laser displacement sensor of the BL-400MZ series.

[0028] Figure 8 It is a 1602 LCD display. Detailed Implementation

[0029] Specific implementation method one: This implementation method is a digital real-time welding angular deformation measuring instrument suitable for "cross" or "T" type parts, including optical axis 1 2, profile 4, optical axis 2 8, 6 laser displacement sensors 9, lead screw a11, cross welding plate 17 and lead screw b18.

[0030] The profile 4 is a "U" shaped structural component. A cross welding plate 17 is provided on the bottom frame of the profile 4, and the cross welding plate 17 is fixed by a clamp. One side of the top frame of the profile 4 is side A 19, and the other side of the top frame of the profile 4 is side B 20. Two optical axis supports 1 are provided on side A 19. Both ends of the first optical axis 2 are set in the through holes of the optical axis support 1. An optical axis nut seat 3 is provided on the first optical axis 2. A lead screw support a6 is provided on the top of the optical axis nut seat 3. An optical axis support 7 is provided on the top of the lead screw support a6. The lead screw support a6 and the optical axis support 7 are provided with through holes.

[0031] Two lead screw supports b13 are provided on side B 20. The lead screw supports b13 are provided with internal threads. One end of the lead screw b18 is threadedly connected to one lead screw support b13, and the other end of the lead screw b18 is threadedly connected to the other lead screw support b13. The end of the other end of the lead screw b18 is connected to the rotating mechanism a14. A threaded seat 21 is provided on the lead screw b18. The threaded seat 21 is provided with internal threads. The external threads of the lead screw b18 are threadedly connected to the internal threads of the threaded seat 21. A lead screw support a6 is provided on the top of the threaded seat 21. An optical axis support 7 is provided on the top of the lead screw support a6. The lead screw support a6 is provided with internal threads, and the optical axis support 7 is provided with a through hole.

[0032] One end of the lead screw a11 passes through the through hole of the lead screw support a6 on side A 19, and the other end of the lead screw a11 is threadedly connected to the internal thread of the lead screw support a6 on side B 20. The other end of the lead screw a11 is connected to the rotating mechanism b12. One end of the second optical axis 8 passes through the through hole of the optical axis support 7 on side A 19, and the other end of the second optical axis 8 passes through the through hole of the optical axis support 7 on side B 20. The second optical axis 8 is arranged parallel to the lead screw a11, and the lead screw a11 is arranged perpendicular to the lead screw b18.

[0033] The upper part of the connecting plate b10 is provided with a through hole, and the lower part of the connecting plate b10 is provided with a threaded hole. The through hole of the upper part of the connecting plate b10 is fitted onto the No. 2 optical axis 8, and the threaded hole of the lower part of the connecting plate b10 is threadedly connected to the lead screw a11. Three laser displacement sensors 9 are respectively provided on the two ends of the connecting plate b10, and the laser displacement sensors 9 on the two ends of the connecting plate b10 are symmetrically arranged.

[0034] The output terminals of the six laser displacement sensors 9 are all electrically connected to the input terminals of the analog-to-485 module. The output terminals of the analog-to-485 module are electrically connected to the input terminals of the RS485 module. The output terminals of the RS485 module are electrically connected to the input terminals of the microcontroller. The output terminals of the microcontroller are electrically connected to the input terminals of the display screen.

[0035] Specific Implementation Method Two: The difference between this implementation method and Specific Implementation Method One is that the cross welding plate 17 is fixed by pressure clamp No. 1 15 and pressure clamp No. 2 16.

[0036] The other steps are the same as in Specific Implementation Method 1.

[0037] Specific Implementation Method 3: The difference between this implementation method and Specific Implementation Method 1 or 2 is that the rotating mechanism a14 is the No. 2 rotating hand and the rotating mechanism b12 is the No. 1 rotating hand.

[0038] The other steps are the same as in Specific Implementation Method 1 or 2.

[0039] Specific implementation method four: The difference between this implementation method and specific implementation methods one to three is that the lead screw support a6 on side A 19 is connected to the optical axis support 7 through the connecting plate a5.

[0040] The other steps are the same as those in Specific Implementation Methods One to Three.

[0041] Specific implementation method five: The difference between this implementation method and specific implementation methods one to four is that the lead screw support a6 on side B 20 is connected to the optical axis support 7 through the connecting plate a5.

[0042] The other steps are the same as those in Specific Implementation Methods One through Four.

[0043] Specific Implementation Method Six: The difference between this implementation method and Specific Implementation Methods One to Five is that the laser displacement sensor 9 is a miniature laser displacement sensor of the BL-400MZ series.

[0044] The other steps are the same as those in Specific Implementation Methods 1 to 5.

[0045] Specific Implementation Method Seven: The difference between this implementation method and Specific Implementation Methods One to Six is ​​that the microcontroller used is an STC89C52 microcontroller.

[0046] The other steps are the same as those in Specific Implementation Methods 1 to 6.

[0047] Specific Implementation Method Eight: The difference between this implementation method and one of the specific implementation methods one to seven is that the display screen is a 1602 LCD display screen.

[0048] The other steps are the same as those in Specific Implementation Methods 1 to 7.

[0049] Specific Implementation Method Nine: This implementation method provides a measurement method for a digital real-time welding angular deformation measuring instrument suitable for "cross" or "T" shaped parts, which is carried out according to the following steps:

[0050] 1. Place the digital real-time welding angle deformation measuring instrument on a horizontal surface, place the universal level on pressure clamp 15 and pressure clamp 26, and adjust the digital real-time welding angle deformation measuring instrument to be horizontal; place one of the right-angled sides of the cross welding plate 17 in pressure clamp 15 and pressure clamp 26, and clamp pressure clamp 15 and pressure clamp 26 to fix the cross welding plate 17.

[0051] 2. By rotating handles 2 and 1 respectively, position the six laser displacement sensors 9 directly above the cross-shaped welding plate 17; plug in the power, import the analog signals measured by the six laser displacement sensors 9 into the analog-to-485 converter module, assign addresses to the analog devices, convert the STC89C52 microcontroller's TTL-to-USB serial port mode to RS485 serial port mode, and connect the microcontroller and RS485 module to form a communication path, as well as connect the RS485 module and the analog-to-485 converter module to form a communication path.

[0052] The analog signal was successfully imported into the STC89C52 microcontroller using the Modbus protocol, and the calculation result of the STC89C52 microcontroller was finally displayed on a 1602 LCD screen.

[0053] Specific Implementation Method 10: The difference between this implementation method and Specific Implementation Method 9 is that the laser displacement sensor 9 is a miniature laser displacement sensor of the BL-400MZ series.

[0054] The other steps are the same as in Specific Implementation Method Nine.

[0055] The beneficial effects of the present invention are verified using the following embodiments:

[0056] Example 1: A digital real-time welding angular deformation measuring instrument suitable for "cross" or "T" type parts, including optical axis 1 2, profile 4, optical axis 2 8, 6 laser displacement sensors 9, lead screw a11, cross welding plate 17 and lead screw b18;

[0057] The profile 4 is a "U" shaped structural component. A cross welding plate 17 is provided on the bottom frame of the profile 4, and the cross welding plate 17 is fixed by a clamp. One side of the top frame of the profile 4 is side A 19, and the other side of the top frame of the profile 4 is side B 20. Two optical axis supports 1 are provided on side A 19. Both ends of the first optical axis 2 are set in the through holes of the optical axis support 1. An optical axis nut seat 3 is provided on the first optical axis 2. A lead screw support a6 is provided on the top of the optical axis nut seat 3. An optical axis support 7 is provided on the top of the lead screw support a6. The lead screw support a6 and the optical axis support 7 are provided with through holes.

[0058] Two lead screw supports b13 are provided on side B 20. The lead screw supports b13 are provided with internal threads. One end of the lead screw b18 is threadedly connected to one lead screw support b13, and the other end of the lead screw b18 is threadedly connected to the other lead screw support b13. The end of the other end of the lead screw b18 is connected to the rotating mechanism a14. A threaded seat 21 is provided on the lead screw b18. The threaded seat 21 is provided with internal threads. The external threads of the lead screw b18 are threadedly connected to the internal threads of the threaded seat 21. A lead screw support a6 is provided on the top of the threaded seat 21. An optical axis support 7 is provided on the top of the lead screw support a6. The lead screw support a6 is provided with internal threads, and the optical axis support 7 is provided with a through hole.

[0059] One end of the lead screw a11 passes through the through hole of the lead screw support a6 on side A 19, and the other end of the lead screw a11 is threadedly connected to the internal thread of the lead screw support a6 on side B 20. The other end of the lead screw a11 is connected to the rotating mechanism b12. One end of the second optical axis 8 passes through the through hole of the optical axis support 7 on side A 19, and the other end of the second optical axis 8 passes through the through hole of the optical axis support 7 on side B 20. The second optical axis 8 is arranged parallel to the lead screw a11, and the lead screw a11 is arranged perpendicular to the lead screw b18.

[0060] The upper part of the connecting plate b10 is provided with a through hole, and the lower part of the connecting plate b10 is provided with a threaded hole. The through hole of the upper part of the connecting plate b10 is fitted onto the No. 2 optical axis 8, and the threaded hole of the lower part of the connecting plate b10 is threadedly connected to the lead screw a11. Three laser displacement sensors 9 are respectively provided on the two ends of the connecting plate b10, and the laser displacement sensors 9 on the two ends of the connecting plate b10 are symmetrically arranged.

[0061] The output terminals of the six laser displacement sensors 9 are all electrically connected to the input terminals of the analog-to-485 module. The output terminals of the analog-to-485 module are electrically connected to the input terminals of the RS485 module. The output terminals of the RS485 module are electrically connected to the input terminals of the microcontroller. The output terminals of the microcontroller are electrically connected to the input terminals of the display screen.

[0062] The cross-shaped welding plate 17 is fixed by pressure clamp 15 and pressure clamp 16; the rotating mechanism a14 is a rotating handle 2, and the rotating mechanism b12 is a rotating handle 1.

[0063] The lead screw support a6 on side A 19 is connected to the optical axis support 7 via the connecting plate a5, and the lead screw support a6 on side B 20 is connected to the optical axis support 7 via the connecting plate a5.

[0064] The laser displacement sensor 9 is a miniature laser displacement sensor of the BL-400MZ series, the microcontroller is an STC89C52 microcontroller, and the display screen is a 1602 LCD display screen.

[0065] Example 2: A measurement method for a digital real-time welding angular deformation measuring instrument suitable for "cross" or "T" shaped parts, comprising the following steps:

[0066] 1. Place the digital real-time welding angle deformation measuring instrument on a horizontal surface, place the universal level on pressure clamp 15 and pressure clamp 26, and adjust the digital real-time welding angle deformation measuring instrument to be horizontal; place one of the right-angled sides of the cross welding plate 17 in pressure clamp 15 and pressure clamp 26, and clamp pressure clamp 15 and pressure clamp 26 to fix the cross welding plate 17.

[0067] 2. By rotating handles 2 and 1 respectively, position the six BL-400MZ series miniature laser displacement sensors directly above the cross-shaped welding plate 17; plug in the power supply, import the analog quantities measured by the six BL-400MZ series miniature laser displacement sensors into the analog-to-485 converter module, assign addresses to the analog devices, convert the STC89C52 microcontroller's TTL-to-USB serial port mode to 485 serial port mode, connect the microcontroller and RS485 module to form a path, connect the RS485 module and analog-to-485 converter module to form a path, and successfully import the analog quantities into the STC89C52 microcontroller using the Modbus protocol. Finally, display the calculation results of the STC89C52 microcontroller on the 1602 LCD screen.

[0068] III. Calculation process and data processing:

[0069] The measured state is that the line connecting the laser displacement sensor positions remains parallel to the horizontal plane, such as... Figure 2 As shown:

[0070] The coordinates of the six sensors of displacement sensor 1 are displayed by laser displacement sensor 2. The vertical distances from left to right are denoted as d1, d2, d3, d4, d5, and d6. The average value of d1, d2, and d3 is denoted as d7, and the average value of d4, d5, and d6 is denoted as d8.

[0071] From this graph, we can derive the following using the Lagrange difference:

[0072]

[0073]

[0074] Differentiating f1(x) and f2(x) and denoteing them as f1 丿 (x) and f2 丿 (x). Substitute d1, d2, d3, and d7 into f1. 丿In (x), find the angle values ​​of the corresponding points, and denote them as θ1, θ2, θ3, and θ7; substitute d4, d5, d6, and d8 into f2. 丿 In (x), the angle values ​​of the corresponding points are calculated and denoted as θ4, θ5, θ6, and θ8. In practice, θ7 and θ8 are the target angles. Adding these two together, we get the angle at the weld, θ9 = θ7 + θ8. Based on the above principle, the STC89C52 microcontroller is programmed and designed, and finally displayed in analog form on a 1602 LCD.

Claims

1. A measurement method for a digital real-time welding angular deformation measuring instrument suitable for "cross" or "T" shaped parts, characterized in that: A digital real-time welding angle deformation measuring instrument suitable for "cross" or "T" type parts is adopted. The digital real-time welding angle deformation measuring instrument suitable for "cross" or "T" type parts includes optical axis 1 (2), profile (4), optical axis 2 (8), 6 laser displacement sensors (9), lead screw a (11), cross welding plate (17) and lead screw b (18). The profile (4) is a "U" shaped structural component. A cross welding plate (17) is provided on the bottom frame of the profile (4). The cross welding plate (17) is fixed by a clamp. One side of the top frame of the profile (4) is side A (19), and the other side of the top frame of the profile (4) is side B (20). Two No. 1 optical axis supports (1) are provided on side A (19). Both ends of the No. 1 optical axis (2) are set in the through holes of the No. 1 optical axis support (1). An optical axis nut seat (3) is provided on the No. 1 optical axis (2). A screw support a (6) is provided on the top of the optical axis nut seat (3). A No. 2 optical axis support (7) is provided on the top of the screw support a (6). A through hole is provided on the screw support a (6), and a through hole is provided on the No. 2 optical axis support (7). Two lead screw supports b (13) are provided on side B (20). The lead screw supports b (13) are provided with internal threads. One end of the lead screw b (18) is threaded to one lead screw support b (13), and the other end of the lead screw b (18) is threaded to the other lead screw support b (13). The other end of the lead screw b (18) is connected to the rotating mechanism a (14). A threaded seat (21) is provided on the lead screw b (18). The threaded seat (21) is provided with internal threads. The external threads of the lead screw b (18) are threaded to the internal threads of the threaded seat (21). A lead screw support a (6) is provided on the top of the threaded seat (21). A No. 2 optical axis support (7) is provided on the top of the lead screw support a (6). The lead screw support a (6) is provided with internal threads, and the No. 2 optical axis support (7) is provided with through holes. One end of the lead screw a (11) passes through the through hole on the lead screw support a (6) on side A (19), and the other end of the lead screw a (11) is threadedly connected to the internal thread on the lead screw support a (6) on side B (20), and the other end of the lead screw a (11) is connected to the rotating mechanism b (12); one end of the No. 2 optical axis (8) passes through the through hole on the No. 2 optical axis support (7) on side A (19), and the other end of the No. 2 optical axis (8) passes through the through hole on the No. 2 optical axis support (7) on side B (20), and the No. 2 optical axis (8) is set parallel to the lead screw a (11), and the lead screw a (11) is set perpendicular to the lead screw b (18); The upper part of the connecting plate b (10) is provided with a through hole, and the lower part of the connecting plate b (10) is provided with a threaded hole. The through hole of the upper part of the connecting plate b (10) is fitted onto the No. 2 optical axis (8), and the threaded hole of the lower part of the connecting plate b (10) is threadedly connected to the lead screw a (11). Three laser displacement sensors (9) are respectively provided on the two ends of the connecting plate b (10), and the laser displacement sensors (9) on the two ends of the connecting plate b (10) are symmetrically arranged. The output terminals of the six laser displacement sensors (9) are all electrically connected to the input terminal of the analog-to-485 module. The output terminal of the analog-to-485 module is electrically connected to the input terminal of the RS485 module. The output terminal of the RS485 module is electrically connected to the input terminal of the microcontroller. The output terminal of the microcontroller is electrically connected to the input terminal of the display screen. The measurement method is performed according to the following steps:

1. Place the digital real-time welding angle deformation measuring instrument on a horizontal surface, place the universal level on the No. 1 pressure clamp (15) and the No. 2 pressure clamp (16), and adjust the digital real-time welding angle deformation measuring instrument to be horizontal; place one of the right-angled sides of the cross welding plate (17) in the No. 1 pressure clamp (15) and the No. 2 pressure clamp (16), and clamp the No. 1 pressure clamp (15) and the No. 2 pressure clamp (16) to fix the cross welding plate (17); 2. By rotating handles 2 and 1 respectively, position the six laser displacement sensors (9) directly above the cross welding plate (17); plug in the power supply, import the analog quantities measured by the six laser displacement sensors (9) into the analog-to-485 converter module, assign addresses to the analog devices, convert the TTL to USB serial port mode of the STC89C52 microcontroller to 485 serial port mode, connect the microcontroller and the RS485 module to form a path, and connect the RS485 module and the analog-to-485 converter module to form a path. The analog signal was successfully imported into the STC89C52 microcontroller using the Modbus protocol, and the calculation result of the STC89C52 microcontroller was finally displayed on the 1602 LCD screen. The coordinates of the six sensors of displacement sensor 1 are displayed by laser displacement sensor 2, and the vertical distances from left to right are denoted as follows: d 1. d 2. d 3. d 4. d 5. d 6. d 1. d 2. d 3. Take the average value as , denoted as d 7. d 4. d 5. d 6. Take the average value, and record it as... d 8; Using the Lagrange difference value, we can find: right f 1(x) and f Differentiating 2(x) is denoted as f 1 丿 (x) and f 2 丿 (x); take d 1. d 2. d 3. d 7. Substitute f 1 丿 In (x), find the angle value of the corresponding point, and denote it as . θ 1. θ2 , θ 3. θ 7; Take d 4. d 5. d 6. d 8 Substitution f 2 丿 In (x), find the angle value of the corresponding point, and denote it as . θ 4. θ 5. θ 6. θ 8; In practice θ 7. θ 8 is the target angle. Adding these two together gives the angle at the weld. θ 9 = θ 7+ θ 8.

2. The measurement method of a digital real-time welding angular deformation measuring instrument applicable to "cross" or "T" shaped parts according to claim 1, characterized in that: The cross-shaped welding plate (17) is fixed by pressure clamp No. 1 (15) and pressure clamp No. 2 (16).

3. The measurement method of a digital real-time welding angular deformation measuring instrument applicable to "cross" or "T" shaped parts according to claim 1, characterized in that: The rotating mechanism a (14) is the No. 2 rotating hand, and the rotating mechanism b (12) is the No. 1 rotating hand.

4. The measurement method of a digital real-time welding angular deformation measuring instrument applicable to "cross" or "T" shaped parts according to claim 1, characterized in that: The lead screw support a (6) on side A (19) is connected to the optical axis support (7) No. 2 through the connecting plate a (5).

5. The measurement method of a digital real-time welding angular deformation measuring instrument applicable to "cross" or "T" shaped parts according to claim 1, characterized in that: The lead screw support a (6) on side B (20) is connected to the optical axis support (7) No. 2 through the connecting plate a (5).

6. The measurement method of a digital real-time welding angular deformation measuring instrument applicable to "cross" or "T" shaped parts according to claim 1, characterized in that: The laser displacement sensor (9) is a miniature laser displacement sensor of the BL-400MZ series.

7. The measurement method of a digital real-time welding angular deformation measuring instrument applicable to "cross" or "T" shaped parts according to claim 1, characterized in that: The microcontroller in question is an STC89C52 microcontroller.

8. The measurement method of a digital real-time welding angular deformation measuring instrument applicable to "cross" or "T" shaped parts according to claim 1, characterized in that: The display screen is model 1602LCD display screen.

9. The measurement method of a digital real-time welding angular deformation measuring instrument applicable to "cross" or "T" shaped parts according to claim 1, characterized in that: The laser displacement sensor (9) is a miniature laser displacement sensor of the BL-400MZ series.

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