Cylindrical axial force member surface shape iterative measurement device and method

Abstract

This invention provides an iterative measurement device and method for the surface shape of a cylindrical axially stressed component, belonging to the field of component measurement technology. It solves the problems of low measurement accuracy, single measurement method, low algorithm efficiency, and insufficient precision of existing measurement devices. This measurement device can detect the perpendicularity of the cylindrical axially stressed component, ensuring its vertical placement. It can stably adjust the height of the probe detection mechanism and the laser measurement mechanism, maintaining stable positions without wobbling, thus satisfying the requirement of measuring the outer contour of the cylindrical axially stressed component's surface twice. By controlling the main unit in conjunction with the probe detection mechanism and the laser measurement mechanism, it achieves rapid and accurate measurement of the cylindrical axially stressed component's appearance shape. The measurement method of this invention does not cause errors in the measured specimen's appearance due to the irregular shape of the track itself. Utilizing an iterative algorithm, it can achieve precise measurement of the appearance of the cylindrical axially stressed component and the track.

Description

Technical Field

[0001] This invention belongs to the field of component measurement technology, and relates to an iterative measurement device for the surface shape of a cylindrical axially stressed component, and more particularly to an iterative measurement method for the surface shape of a cylindrical axially stressed component. Background Technology

[0002] Cylindrical axially loaded structural members such as steel pipes are widely used in civil engineering due to their advantages of being lightweight, high-strength, and easy to construct. However, during the welding and cooling process, uneven heating and cooling can lead to residual deformation. Thin-walled hollow steel pipes, with their lower out-of-plane stiffness, are prone to significant residual deformation, resulting in initial geometric defects. These initial defects have a considerable impact on the mechanical properties of hollow steel pipes, causing premature local buckling.

[0003] Existing defect measurement systems all use linear displacement sensors or other types of contact sensors. The measurement accuracy of these sensors is greatly affected by temperature changes. They also ignore the error caused by the irregular shape of the sensor track on the appearance of the test specimen. The measurement methods are limited, and the algorithms are inefficient and inaccurate.

[0004] A search revealed a Chinese patent document disclosing a seamless steel pipe surface cylindricity monitoring instrument [Application No.: CN202121009435.4; Publication No.: CN214793087U]. This monitoring instrument includes a base and a support frame fixed on the base, as well as a clamping mechanism, a detection mechanism, and a transmission mechanism. The clamping mechanism fixes the seamless steel pipe to the support frame. Then, under the action of the lifting component, the position of the contact component is adjusted so that the contact component contacts and adheres to the surface of the seamless steel pipe. The motor is started, thereby driving the seamless steel pipe to rotate, so that the contact component can detect the cylindricity of the seamless steel pipe surface. Although this monitoring instrument is more efficient than manual inspection and avoids the inaccuracy of the test results caused by the instability of the handheld inspection device, it cannot achieve rapid and accurate measurement of the appearance shape of axial components, thus failing to lay the foundation for high-quality structural buckling tests.

[0005] Based on this, we propose an iterative measurement device for the surface shape of a cylindrical axially stressed component. This device allows for the vertical placement of the cylindrical axially stressed component; it enables stable adjustment of the height of the probe detection mechanism and the laser measurement mechanism, facilitating the comparison of the outer contour lines of the cylindrical axially stressed component's surface during two measurements; and it enables rapid and accurate measurement of the appearance shape of the cylindrical axially stressed component. The measurement method of this invention does not cause errors in the appearance of the measured specimen due to the irregular shape of the track itself. Utilizing an iterative algorithm, it achieves precise measurement of both the appearance of the cylindrical axially stressed component and the track. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an iterative measurement device and method for the surface shape of a cylindrical axially stressed component. The technical problem to be solved by this invention is: how to ensure that the irregular shape of the track itself does not cause errors in the appearance of the measured specimen. By utilizing an iterative algorithm, the appearance of the cylindrical axially stressed component and the track can be accurately measured.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A device for iterative measurement of the surface shape of a cylindrical axially stressed component includes a lifting base assembly, a rotating mechanism above the lifting base assembly, and several lifting adjustment mechanisms above the lifting base assembly. The rotating mechanism is located in the middle of the lifting adjustment mechanisms, and a fixing ring is provided at the upper end of each lifting adjustment mechanism. A laser measuring mechanism is provided on two opposite lifting adjustment mechanisms, and a longitudinal contact detector and a probe detection mechanism are respectively provided on two other opposite lifting adjustment mechanisms. A control host assembly is provided on the lifting base assembly, and the control host assembly is electrically connected to the lifting base assembly, the laser measuring mechanism, the longitudinal contact detector, and the probe detection mechanism.

[0009] The working principle of this invention is as follows: The cylindrical axial force-bearing component to be tested is inserted through the fixing ring and placed above the rotating mechanism. The cylindrical axial force-bearing component (hollow rod or solid rod) is fixed. According to the size of the cylindrical axial force-bearing component to be tested, the position of the lifting adjustment mechanism is adjusted, thereby adjusting the height of the longitudinal contact detector, the probe detection mechanism, and the two laser measuring mechanisms. The longitudinal contact detector and the probe detection mechanism are adjusted to contact the outer surface of the cylindrical axial force-bearing component, and the two laser measuring mechanisms are at the same height and facing each other.

[0010] The lifting base assembly drives the rotating mechanism to lift and lower, thereby lifting and lowering the cylindrical axial force-bearing component to be tested. The rotating mechanism drives the cylindrical axial force-bearing component to rotate. The longitudinal contact detector checks the verticality of the cylindrical axial force-bearing component to be tested. The position of the cylindrical axial force-bearing component can be manually adjusted to ensure that the cylindrical axial force-bearing component is placed vertically.

[0011] Assuming the track of the cylindrical axially stressed member is a circle, the diameter of the circle is initially determined;

[0012] Based on the diameter of the circle, an inaccurate outer contour line of the cylindrical axially stressed component under test is obtained by using a probe detection mechanism and two laser measurement mechanisms in conjunction with the detection.

[0013] Find the centroid;

[0014] Using the centroid and the known profile of the standard specimen, the trajectory curve is reversed by manipulating the main unit to obtain the trajectory curve function (function 1) in polar coordinates.

[0015] Using the obtained trajectory curve function (function 1), the outer contour line of the new object under test is obtained through the cooperation of a probe detection mechanism and two laser measurement mechanisms.

[0016] Find the centroid;

[0017] Using the centroid and the known profile of the standard specimen, the trajectory curve is reversed by manipulating the main unit to obtain the trajectory curve function (function 2) in polar coordinates.

[0018] Repeat the above steps until the two obtained trajectory function curves are close and less than 1e-4, and finally give the accurate shape and accurate trajectory of the measured circle.

[0019] The lifting base assembly includes a base body and a lifting plate. The base body is provided with several linear bearings and screw seats. Several sliding rods and screws are fixed on the lower side of the lifting plate. The sliding rods are slidably arranged inside the linear bearings at corresponding positions. The screws are connected to the screw seats in a transmission manner. A lifting motor is fixed on the base body. A pulley pair is provided between the output shaft of the lifting motor and the screw seats.

[0020] With the above structure, the output shaft of the lifting motor drives the screw seat to rotate through the pulley pair. The screw is connected to the screw seat, thereby driving the screw to rise and fall, which in turn drives the lifting plate to rise and fall. When the lifting plate rises and falls, it drives the slide rod to slide inside the linear bearing at the corresponding position, ensuring that the lifting plate rises and falls smoothly.

[0021] The rotating mechanism includes a rotating bracket, which is fixed on the upper side of the lifting plate. A rotating motor is provided on the inner side of the rotating bracket. A turntable is fixed on the output shaft of the rotating motor. A detection sensor and several support beads are provided on the upper side of the rotating bracket. The turntable abuts against the support beads. The detection sensor is directly opposite the turntable. An electric chuck is fixed on the upper end of the turntable. The electric chuck is provided with several circumferentially distributed stepped chuck seats.

[0022] Using the above structure, the cylindrical axially stressed component to be tested is placed on the stepped clamp. The stepped clamp is moved by an electric chuck according to the size of the cylindrical axially stressed component to be tested, clamping the cylindrical axially stressed component to be tested. The output shaft of the rotating motor drives the turntable to rotate smoothly against several support balls, thereby rotating the electric chuck, which in turn drives the cylindrical axially stressed component to be tested to rotate, and the rotation angle (i.e., the detection distance) is detected.

[0023] The lifting and adjusting mechanism includes a vertical rod, a rack on the vertical rod, a vertical rod slide block slidably on the vertical rod, a rotating main shaft rotatably mounted on the vertical rod slide block, a gear fixed on the rotating main shaft, the gear meshing with the rack, a handwheel at the end of the rotating main shaft, a set bolt screwed onto the vertical rod slide block, the set bolt abutting against the vertical rod, a vertical rod angle rotating shaft rotatably mounted on the vertical rod slide block, and a mounting plate fixed on the angle rotating shaft.

[0024] Using the above structure, turning the handwheel drives the main shaft to rotate, which in turn drives the gear to rotate. The gear meshes with the rack, causing the vertical rod slide to slide on the vertical rod. After adjustment, tightening the set bolt causes it to abut against the vertical rod, locking the height of the vertical rod slide. Then, the angle of the mounting plate is adjusted by rotating the angle shaft, thereby adjusting the height and angle of the laser measuring mechanism, the longitudinal contact detector, and the probe detection mechanism.

[0025] The probe detection mechanism includes a fixing plate, which is fixed to a mounting plate at a corresponding position. A crossbar is fixed on the fixing plate, and a crossbar slide block is slidably provided on the crossbar. A locking screw is provided on the crossbar slide block, and the locking screw abuts against the crossbar. A locking wheel is provided on the crossbar slide block, and a clamping rod is provided at the end of the locking wheel. The clamping rod is provided with a probe.

[0026] Using the above structure, the position of the crossbar slide on the crossbar is adjusted according to the position and size of the cylindrical axially stressed component to be tested. Then, the rotation angle of the clamping rod is adjusted, and the position and opening angle of the contact probe on the clamping rod are adjusted so that the end of the contact probe abuts against the outer surface of the cylindrical axially stressed component to be tested.

[0027] The laser measurement mechanism includes a mounting shaft, which is fixed to a mounting plate at a corresponding position. A fixed bracket is fixed on the mounting shaft, and a rotating card box is rotatably mounted on the fixed bracket. A laser detector is fixed on the rotating card box.

[0028] Using the above structure, the rotation angle of the rotating cassette on the fixed cassette is adjusted according to the position and size of the cylindrical axially stressed component to be tested, thereby adjusting the angle of the laser detector for laser detection.

[0029] The control host assembly includes a fixed connecting base, which is fixed to the base body. The fixed connecting base is provided with an angle adjustment rod, and the angle adjustment rod is provided with a placement plate. The placement plate is provided with the host, mouse and keyboard.

[0030] Using the above structure, the position of the angle adjustment lever can be adjusted according to the user's body size, thereby adjusting the position of the placement board, making it convenient for the user to operate via mouse and keyboard.

[0031] Compared with existing technologies, this iterative measurement device for the surface shape of a cylindrical axially stressed component has the following advantages:

[0032] By combining the lifting base assembly, the rotating mechanism and the longitudinal contact detector, the verticality of the cylindrical axial force-bearing component is detected. The position of the cylindrical axial force-bearing component can be manually adjusted to ensure that the cylindrical axial force-bearing component is placed vertically.

[0033] By cooperating with the lifting and adjusting mechanism, the probe detection mechanism and the laser measurement mechanism, the height of the probe detection mechanism and the laser measurement mechanism can be stably adjusted, and the position can be stable without shaking, which can meet the requirements of two tests on the outer contour line of the cylindrical axially stressed component.

[0034] By controlling the main unit components in conjunction with the probe detection mechanism and the laser measurement mechanism, the precise comparison of the trajectory curve function is achieved, and the accurate shape and trajectory of the measured circle are finally given, enabling rapid and accurate measurement of the appearance shape of cylindrical axially stressed components.

[0035] This iterative measurement method for the surface shape of a cylindrical axially stressed component, through the cooperation of a probe detection mechanism and a laser measurement mechanism, ensures that the irregular shape of the track itself will not cause errors in the appearance of the measured specimen. By utilizing an iterative algorithm, it is possible to achieve accurate measurement of the appearance of the cylindrical axially stressed component and the track. Attached Figure Description

[0036] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0037] Figure 2 This is a three-dimensional structural diagram of the lifting base assembly in this invention.

[0038] Figure 3 This is a three-dimensional structural diagram of the rotating mechanism in this invention.

[0039] Figure 4 This is a three-dimensional structural diagram of the lifting and adjusting mechanism in this invention.

[0040] Figure 5 This is a three-dimensional structural diagram of the probe detection mechanism in this invention.

[0041] Figure 6 This is a three-dimensional structural diagram of the laser measurement mechanism in this invention.

[0042] Figure 7 This is a three-dimensional structural diagram of the control host component in this invention.

[0043] Figure 8 This is a flowchart of the method of the present invention.

[0044] In the diagram: 1. Lifting base assembly; 2. Rotating mechanism; 3. Lifting adjustment mechanism; 4. Laser measuring mechanism; 5. Longitudinal contact detector; 6. Fixing ring; 7. Probe detection mechanism; 8. Control host assembly; 9. Base body; 10. Slide rod; 11. Screw; 12. Linear bearing; 13. Lifting plate; 14. Pulley pair; 15. Lifting motor; 16. Rotating motor; 17. Rotating bracket; 18. Support ball; 19. Detection sensor; 20. Step holder; 21. Electric chuck; 22. Turntable 23. Vertical rod; 24. Rack; 25. Vertical rod slide; 26. Handwheel; 27. Mounting plate; 28. Angle pivot; 29. ​​Gear; 30. Fixing plate; 31. Horizontal rod; 32. Horizontal rod slide; 33. Locking screw; 34. Locking wheel; 35. Clamping rod; 36. Contact probe; 37. Mounting shaft; 38. Fixing bracket; 39. Rotating card box; 40. Laser detector; 41. Fixing connector; 42. Angle adjustment rod; 43. Main unit; 44. Placement plate; 45. Mouse; 46. Keyboard. Detailed Implementation

[0045] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0046] like Figures 1-7 As shown, the cylindrical axially stressed component surface shape iterative measurement device includes a lifting base assembly 1, a rotating mechanism 2 above the lifting base assembly 1, and several lifting adjustment mechanisms 3 above the lifting base assembly 1. The rotating mechanism 2 is located in the middle of the several lifting adjustment mechanisms 3, and a fixing ring 6 is provided at the upper end of the several lifting adjustment mechanisms 3. A laser measuring mechanism 4 is provided on two opposite lifting adjustment mechanisms 3, and a longitudinal contact detector 5 and a probe detection mechanism 7 are respectively provided on two other opposite lifting adjustment mechanisms 3. A control host assembly 8 is provided on the lifting base assembly 1, and the control host assembly 8 is electrically connected to the lifting base assembly 1, the laser measuring mechanism 4, the longitudinal contact detector 5, and the probe detection mechanism 7.

[0047] The working principle of this invention is as follows: The cylindrical axial force-bearing component to be tested is inserted through the fixing ring 6 and placed above the rotating mechanism 2. The cylindrical axial force-bearing component (hollow rod or solid rod) is fixed. According to the size of the cylindrical axial force-bearing component to be tested, the position of the lifting adjustment mechanism 3 is adjusted, thereby adjusting the height of the longitudinal contact detector 5, the probe detection mechanism 7, and the two laser measuring mechanisms 4. The longitudinal contact detector 5 and the probe detection mechanism 7 are adjusted to contact the outer surface of the cylindrical axial force-bearing component, and the two laser measuring mechanisms 4 are at the same height and facing each other.

[0048] The lifting base assembly 1 drives the rotating mechanism 2 to lift and lower, thereby lifting and lowering the cylindrical axial force-bearing component to be tested. The rotating mechanism 2 drives the cylindrical axial force-bearing component to rotate. The longitudinal contact detector 5 checks the verticality of the cylindrical axial force-bearing component to be tested. The position of the cylindrical axial force-bearing component can be manually adjusted to ensure that the cylindrical axial force-bearing component is placed vertically.

[0049] Assuming the track of the cylindrical axially stressed member is a circle, the diameter of the circle is initially determined;

[0050] Based on the diameter of the circle, the probe detection mechanism 7 and two laser measurement mechanisms 4 work together to detect and obtain an inaccurate outer contour line of the cylindrical axially stressed component under test.

[0051] Find the centroid;

[0052] Using the centroid and the known profile of the standard specimen, the trajectory curve is reversed by manipulating the host component 8 to obtain the trajectory curve function (function 1) in polar coordinates.

[0053] Using the obtained trajectory curve function (function 1), the outer contour line of the new object under test is obtained through the cooperation of probe detection mechanism 7 and two laser measurement mechanisms 4.

[0054] Find the centroid;

[0055] Using the centroid and the known profile of the standard specimen, the trajectory curve is reversed by manipulating the main unit 8 to obtain the trajectory curve function (function 2) in polar coordinates.

[0056] Repeat the above steps until the two obtained trajectory function curves are close and less than 1e-4, and finally give the accurate shape and accurate trajectory of the measured circle.

[0057] The lifting base assembly 1 includes a base body 9 and a lifting plate 13. The base body 9 is provided with several linear bearings 12 and screw seats. Several sliding rods 10 and screws 11 are fixed on the lower side of the lifting plate 13. The sliding rods 10 are slidably disposed inside the linear bearings 12 at corresponding positions. The screws 11 are driven to the screw seats. A lifting motor 15 is fixed on the base body 9. A pulley pair 14 is provided between the output shaft of the lifting motor 15 and the screw seats. The output shaft of the lifting motor 15 drives the screw seats to rotate through the pulley pair 14. The screws 11 are driven to the screw seats, thereby driving the screws 11 to rise and fall, thereby driving the lifting plate 13 to rise and fall. When the lifting plate 13 rises and falls, it drives the sliding rods 10 to slide inside the linear bearings 12 at corresponding positions, ensuring that the lifting plate 13 rises and falls smoothly.

[0058] The rotating mechanism 2 includes a rotating bracket 17, which is fixed to the upper side of the lifting plate 13. A rotating motor 16 is located inside the rotating bracket 17. A turntable 22 is fixed to the output shaft of the rotating motor 16. A detection sensor 19 and several supporting rotating balls 18 are located on the upper side of the rotating bracket 17. The turntable 22 abuts against the supporting rotating balls 18. The detection sensor 19 is directly opposite the turntable 22. An electric chuck 21 is fixed to the upper end of the turntable 22. The electric chuck 21 has several circumferentially distributed stepped chuck seats 20. The mechanism then places the object to be detected... The cylindrical axial force-bearing component is placed on the stepped clamp 20. The stepped clamp 20 is moved by the electric chuck 21 according to the size of the cylindrical axial force-bearing component to be tested, clamping the cylindrical axial force-bearing component to be tested. The output shaft of the rotating motor 16 drives the turntable 22 to rotate smoothly against several support beads 18, thereby rotating the electric chuck 21, which in turn drives the cylindrical axial force-bearing component to be tested to rotate. The detection sensor 19 detects the rotation angle (i.e., the detection distance).

[0059] The lifting and adjusting mechanism includes a vertical rod 23, a rack 24 mounted on the vertical rod 23, a vertical rod slide 25 slidably mounted on the vertical rod 23, a rotating main shaft rotatably mounted on the vertical rod slide 25, a gear 29 fixed on the rotating main shaft, the gear 29 meshing with the rack 24, a handwheel 26 at the end of the rotating main shaft, a set bolt screwed onto the vertical rod slide 25, the set bolt abutting against the vertical rod 23, an angle rotating shaft 28 rotatably mounted on the vertical rod slide 25, and a mounting bracket fixed on the angle rotating shaft 28. Mount plate 27; rotate handwheel 26, which drives the rotating main shaft to rotate, thereby driving gear 29 to rotate. Gear 29 meshes with rack 24, causing vertical rod slide 25 to slide on vertical rod 23. After adjustment, tighten the set bolt, which abuts against vertical rod 23 to lock the height of vertical rod slide 25. Then, rotate the angle of mounting plate 27 through angle rotating shaft 28 to adjust the height and angle of laser measuring mechanism 4, longitudinal contact detector 5 and probe detection mechanism 7.

[0060] The probe detection mechanism 7 includes a fixed plate 30, which is fixed to a mounting plate 27 at a corresponding position. A crossbar 31 is fixed on the fixed plate 30. A crossbar slide 32 is slidably mounted on the crossbar 31. A locking screw 33 is mounted on the crossbar slide 32 and abuts against the crossbar 31. A locking wheel 34 is mounted on the crossbar slide 32. A clamping rod 35 is mounted at the end of the locking wheel 34. An abutting probe 36 is mounted on the clamping rod 35. According to the position and size of the cylindrical axially stressed component to be detected, the position of the crossbar slide 32 on the crossbar 31 is adjusted, the rotation angle of the clamping rod 35 is adjusted, and the position and opening angle of the abutting probe 36 on the clamping rod 35 are adjusted so that the end of the abutting probe 36 abuts against the outer surface of the cylindrical axially stressed component to be detected. When the cylindrical axially stressed component to be detected rotates, the abutting probe 36 detects its outer contour line.

[0061] The laser measuring mechanism 4 includes a mounting shaft 37, which is fixed to a mounting plate 27 at a corresponding position. A fixed bracket 38 is fixed on the mounting shaft 37, and a rotating cassette 39 is rotatably mounted on the fixed bracket 38. A laser detector 40 is fixed on the rotating cassette 39. According to the position and size of the cylindrical axially stressed component to be detected, the rotation angle of the rotating cassette 39 on the fixed bracket 38 is adjusted, thereby adjusting the angle of the laser detector 40 to perform laser detection and detect the outer contour line of the cylindrical axially stressed component.

[0062] The control host assembly 8 includes a fixed connecting base 41, which is fixed to the base body 9. The fixed connecting base 41 is provided with an angle adjustment rod 42, and the angle adjustment rod 42 is provided with a placement plate 44. The placement plate 44 is provided with a host 43, a mouse 45, and a keyboard 46. The position of the angle adjustment rod 42 can be adjusted according to the user's body size, thereby adjusting the position of the placement plate 44, so that the user can operate the device through the mouse 45 and the keyboard 46.

[0063] like Figure 8 As shown, an iterative measurement method for the surface shape of a cylindrical axially stressed component is described, with the following specific steps:

[0064] The first step is to place the cylindrical axial force-bearing component. The lifting base assembly 1 and the rotating mechanism 2 work together to drive the cylindrical axial force-bearing component to move up and down and rotate. The longitudinal contact detector 5 checks the verticality of the cylindrical axial force-bearing component to be tested. The position of the cylindrical axial force-bearing component can be manually adjusted to ensure that the cylindrical axial force-bearing component is placed vertically.

[0065] The second step is to assume that the track of the cylindrical axially stressed component is a circle and to preliminarily determine the diameter of the circle.

[0066] The third step involves using the probe detection mechanism 7 and two laser measurement mechanisms 4 in conjunction with the circle diameter to conduct a comparative test and obtain an inaccurate outer contour line of the object being measured.

[0067] The fourth step is to find the centroid;

[0068] The fifth step involves using the centroid and the known profile of the standard specimen to reverse-engineer the trajectory curve by manipulating the main unit 8, thereby obtaining the trajectory curve function (function 1) in polar coordinates.

[0069] The sixth step is to use the obtained trajectory curve function (function 1) to test and obtain the outer contour line of the new object being tested.

[0070] Step 7: Find the centroid;

[0071] Step 8: Using the centroid and the known standard specimen profile, reverse the trajectory curve by manipulating the main unit 8 to obtain the trajectory curve function (function 2) in polar coordinates.

[0072] Step 9: Repeat steps 1 to 8 until the two obtained trajectory function curves are close and less than 1e-4, finally giving the accurate shape and accurate trajectory of the measured circle.

[0073] In summary, by cooperating with the lifting base assembly 1, the rotating mechanism 2 and the longitudinal contact detector 5, the verticality of the cylindrical axial force-bearing component can be detected, and the position of the cylindrical axial force-bearing component can be manually adjusted to achieve vertical placement of the cylindrical axial force-bearing component;

[0074] By cooperating with the lifting adjustment mechanism 3, the probe detection mechanism 7, and the laser measurement mechanism 4, the height of the probe detection mechanism 7 and the laser measurement mechanism 4 can be stably adjusted, and the position is stable and will not shake, which satisfies the requirement of detecting the outer contour line of the cylindrical axially stressed component surface twice.

[0075] By cooperating with the host component 8, probe detection mechanism 7, and laser measurement mechanism 4, the precise comparison of the trajectory curve function is achieved, and the accurate shape and trajectory of the measured circle are given, enabling rapid and accurate measurement of the appearance shape of cylindrical axially stressed components.

[0076] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A cylindrical axial load member surface shape iterative measuring device comprising a lifting base assembly (1), characterized in that, The upper side of the lifting base assembly (1) is provided with a rotating mechanism (2), and the upper side of the lifting base assembly (1) is provided with a plurality of lifting adjusting mechanisms (3), the rotating mechanism (2) is located in the middle of the plurality of lifting adjusting mechanisms (3), the upper end of the plurality of lifting adjusting mechanisms (3) is provided with a fixed ring (6), and the opposite two lifting adjusting mechanisms (3) are provided with a laser measuring mechanism (4), and the other opposite two lifting adjusting mechanisms (3) are respectively provided with a longitudinal contact detector (5) and a probe detection mechanism (7), the lifting base assembly (1) is provided with a control host assembly (8), and the control host assembly (8) is electrically connected with the lifting base assembly (1), the laser measuring mechanism (4), the longitudinal contact detector (5) and the probe detection mechanism (7); the lifting base assembly (1) comprises a base body (9) and a lifting plate (13), a plurality of linear bearings (12) and screw seats are arranged on the base body (9), a plurality of slide rods (10) and screw rods (11) are fixed to the lower side of the lifting plate (13), the slide rods (10) are slidably arranged in the corresponding linear bearings (12), the screw rods (11) are in transmission connection with the screw seats, the base body (9) is fixedly provided with a lifting motor (15), and a belt pulley pair (14) is arranged between the output shaft of the lifting motor (15) and the screw seat; the rotating mechanism (2) comprises a rotating support (17), the rotating support (17) is fixed to the upper side of the lifting plate (13), the inner side of the rotating support (17) is provided with a rotating motor (16), the output shaft of the rotating motor (16) is fixedly provided with a rotating disc (22), the upper side of the rotating support (17) is provided with a detection sensor (19) and a plurality of supporting rotation balls (18), the rotating disc (22) is located above the supporting rotation balls (18), the detection sensor (19) is opposite to the rotating disc (22), the upper end of the rotating disc (22) is fixedly provided with an electric chuck (21), and a plurality of circumferentially distributed stepped clamping bases (20) are arranged on the electric chuck (21).

2. The surface shape iterative measuring device for a cylindrical axial load member according to claim 1, characterized by The lifting adjusting mechanism comprises a vertical rod (23), the vertical rod (23) is provided with a rack (24), the vertical rod (23) is slidably provided with a vertical rod sliding seat (25), the vertical rod sliding seat (25) is rotatably provided with a rotating main shaft, the rotating main shaft is fixedly provided with a gear (29), the gear (29) is engaged with the rack (24), the end of the rotating main shaft is provided with a hand wheel (26), the vertical rod sliding seat (25) is screw-connected with a locking bolt, the locking bolt is in contact with the vertical rod (23), the vertical rod sliding seat (25) is rotatably provided with a vertical rod (23) angle shaft (28), and the angle shaft (28) is fixedly provided with a mounting plate (27).

3. The surface shape iterative measuring device for a cylindrical axial load member according to claim 2, characterized by The probe detection mechanism (7) comprises a fixed plate (30) fixed on the mounting plate (27) at the corresponding position, a cross bar (31) fixed on the fixed plate (30), a cross bar sliding seat (32) slidingly arranged on the cross bar (31), a locking screw (33) arranged on the cross bar sliding seat (32) and abutting against the cross bar (31), a locking rotating wheel (34) arranged on the cross bar sliding seat (32), a clamping rod (35) arranged at the end of the locking rotating wheel (34), and an abutting probe (36) arranged on the clamping rod (35).

4. The surface shape measurement device for a cylindrical axial load member according to Claim 3, wherein The laser measurement mechanism (4) comprises a mounting shaft (37) fixed on the mounting plate (27) at the corresponding position, a fixed clamping seat (38) fixed on the mounting shaft (37), a rotating clamping box (39) rotatably arranged on the fixed clamping seat (38), and a laser detector (40) fixed on the rotating clamping box (39).

5. The surface shape measurement device for a cylindrical axial load member according to Claim 1, wherein The control host assembly (8) comprises a fixed connecting seat (41) fixed on the base body (9), an angle adjusting rod (42) arranged on the fixed connecting seat (41), a placement plate (44) arranged on the angle adjusting rod (42), a host (43), a mouse (45) and a keyboard (46) arranged on the placement plate (44).

6. A measurement method obtained by the cylindrical axial force member surface shape iterative measurement device according to any one of claims 1 to 5, characterized by, The specific steps include the following: In the first step, the cylindrical axial force member is placed, and the cylindrical axial force member is driven to ascend and rotate by the cooperation of the lifting base assembly and the rotating mechanism, the verticality of the cylindrical axial force member to be detected is checked by the longitudinal abutting detector, the position of the cylindrical axial force member can be manually adjusted to ensure that the cylindrical axial force member is vertically placed; In the second step, it is assumed that the track of the cylindrical axial force member is a circle, and the circle diameter is preliminarily determined; In the third step, the probe detection mechanism and the two laser measurement mechanisms are cooperated to detect and compare, so as to obtain an inaccurate outer contour line of the measured object; In the fourth step, the centroid is obtained; In the fifth step, the centroid and the known standard specimen contour are used to back-propagate by the control host assembly, the track curve is back-propagated, and the track curve function 1 expressed in polar coordinates is obtained; In the sixth step, the obtained track curve function 1 is used to test the outer contour line of the new measured object; In the seventh step, the centroid is obtained; In the eighth step, the centroid and the known standard specimen contour are used to back-propagate by the control host assembly, the track curve is back-propagated, and the track curve function 2 expressed in polar coordinates is obtained; In the ninth step, the first to eighth steps are repeatedly repeated until the track functions obtained twice are close and less than 1e-4, and finally the accurate shape and the accurate track of the measured circle are given.

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