Calibrating device for automobile parts

Abstract

The invention relates to the technical field of proofreading devices, in particular to an automobile part proofreading device which comprises a supporting frame, a proofreading rod and a longitudinal displacement control mechanism, and in the process that the longitudinal displacement control mechanism drives the proofreading rod to move longitudinally, the proofreading rod stops moving after being blocked; the supporting frame is provided with a compression detector, and the compression detector corresponds to the calibration rod. The calibration rod is provided with an opening, and a measuring rod is arranged in the opening. The calibration device further comprises a measurement control mechanism, the measurement control mechanism is used for driving the measurement rod to extend out of the hole and contact with the inner wall of the punching hole, and the calibration is carried out in a secondary verification mode and drives the measurement rod to extend out of the hole of the calibration rod. The industrial computer knows whether the calibration rod is located at the circle center of the stamping hole or not according to the extension amount of the measuring rod, so that whether the stamping hole deviates or not is judged, and the problem that the stamping hole deviates but is still judged to be a qualified stamping hole is solved.

Description

Technical Field

[0001] The invention relates to the technical field of proofreading devices, and in particular to a proofreading device for automobile parts. Background Art

[0002] In automobile parts, punching is often used in body structure parts, interior parts, chassis components, exhaust systems, etc. These holes are usually used to reduce weight, enhance structural strength or facilitate assembly; in the process of punching automobile parts, it is necessary to ensure the position and size of the holes are accurate through proofreading to ensure the assembly and function of the parts.

[0003] Chinese patent: CN202021398151.4 discloses a proofreading device for automobile parts, including a base, on which a placement groove is provided; a vertical plate is provided on both sides of the base, and a crossbeam is connected to the upper end of the vertical plate, and the crossbeam is connected to an electric telescopic rod, and the electric telescopic rod is connected to a movable plate, and a bracket structure is connected below the movable plate, and a proofreading rod is provided in cooperation with the bracket structure, and the proofreading rod corresponds to the position of the punching hole of the standard part, and the outer diameter of the proofreading rod is 0.1-0.2mm smaller than the inner diameter of the punching hole of the standard part matched with it; and a sounding structure is also provided. During the operation, the punching holes of automobile parts are proofread by the proofreading rod and the sounding structure. Because the set position of the proofreading rod corresponds to the position of the punching hole of the standard part, if the punching hole is missed or offset, the proofreading rod cannot pass through the punching hole, and the sounding device will emit a sound as a warning; the proofreading rod can be reused in the process, and no other losses will be generated, which can save operation costs and improve operation efficiency.

[0004] According to the above patent, the proofreading of punching holes of automobile parts is judged by whether the proofreading rod passes through the punching hole. However, if there is a slight deviation in the punching hole and the proofreading rod has a smaller diameter than the punching hole, the proofreading rod can still pass through the punching hole smoothly. This will cause the punching hole to be offset but still be judged as a qualified punching hole. Summary of the invention

[0005] In view of this, the purpose of the present invention is to propose a proofreading device for automobile parts to solve the technical problem that if there is a slight offset in the punching hole, the proofreading rod can still pass through the punching hole smoothly because the diameter is smaller than the punching hole, which will cause the punching hole to be offset but still be judged as a qualified punching hole.

[0006] Based on the above purpose, the present invention provides a proofreading device for automobile parts, comprising a support frame, the proofreading device also comprising a proofreading rod with an elastic structure and a longitudinal displacement control mechanism arranged on the support frame, in the process of the longitudinal displacement control mechanism driving the proofreading rod to move longitudinally, the proofreading rod will stop moving after being blocked; A pressure detector is provided on the support frame, and the pressure detector corresponds to the calibration rod; An opening is arranged on the calibration rod, and a measuring rod is arranged in the opening; The calibration device also includes a measurement control mechanism, which is used to drive the measuring rod to extend from the opening and contact the inner wall of the punching hole.

[0007] Preferably, a first frame body and a second frame body arranged below the first frame body are provided on the upper part of the proofreading rod, the top end of the proofreading rod passes through the second frame body and the lower edge of the first frame body in sequence, a sliding bearing is provided on the proofreading rod, and the sliding bearing is fixedly installed on the second frame body, a first limiting plate is provided on the top end of the proofreading rod, and the first limiting plate is higher than the lower edge of the first frame body, and a first elastic element for pushing the proofreading rod to descend is provided inside the first frame body.

[0008] Preferably, the pressure detector includes a ring plate, which is located below the proofreading rod, a guide rod is provided below the ring plate, the guide rod passes through the support frame and is slidably connected thereto, a second limit plate is provided at the bottom end of the guide rod, and the second limit plate is located below the support frame, a second elastic element is sleeved on the guide rod, two ends of the second elastic element respectively abut the support frame and the ring plate, a pressure sensor is provided on the support frame, and the pressure sensor is located below the ring plate.

[0009] Preferably, an inner cavity is formed inside the calibration rod, the measuring rod is symmetrically arranged on the calibration rod and slidably connected through the opening, and the measuring control mechanism includes a retracting component for controlling the measuring rod to retract into the inner cavity, and the retracting component is arranged inside the inner cavity; The measurement control mechanism also includes a connecting rod, which is transmission-connected to the measuring rod. An adsorption sheet is arranged at the bottom end of the connecting rod. An electromagnet is arranged on the support frame, and the electromagnet is located below the adsorption sheet. An infrared distance sensor is also arranged on the support frame, and the infrared distance sensor faces the bottom end of the connecting rod.

[0010] Preferably, the shrinkage assembly includes a connecting plate, which is in the inner cavity of the proofreading rod, and connecting rods are symmetrically arranged on the connecting plate, one end of the connecting rod is hinged to the connecting plate, and the other end of the connecting rod is hinged to one end of the measuring rod, the top of the connecting rod is fixedly connected to the bottom of the connecting plate, and a third limiting plate is arranged inside the inner cavity, and the third limiting plate is below the connecting plate, and a third elastic element is sleeved on the connecting rod, and the two ends of the third elastic element respectively contact the connecting plate and the third limiting plate.

[0011] Preferably, the longitudinal displacement control mechanism comprises a vertical plate and a connecting plate, the vertical plate is arranged on one side of the support frame and fixedly connected thereto, the calibration rods are distributed and arranged below the connecting plate, the connecting plate has an extension portion, the vertical plate is provided with a longitudinal slide groove, the extension portion of the connecting plate passes through the longitudinal slide groove and is slidably connected thereto; A first threaded rod is arranged on the vertical plate, and the first threaded rod is rotatably connected to the vertical plate. The first threaded rod passes through the extension portion of the connecting plate, and the first threaded rod is threadedly connected to the connecting plate. A first servo motor is also arranged on the vertical plate and fixedly connected thereto, and the output shaft of the first servo motor is transmission-connected to the first threaded rod.

[0012] Preferably, the proofreading device further comprises a conveying mechanism, the conveying mechanism comprises a bracket and a chain, the brackets are symmetrically arranged on both sides of the support frame, and the chains are distributed on the brackets on both sides; Gears are arranged at both ends of the bracket, and the chains are respectively sleeved on the gears at both ends of the bracket and meshed with them; The conveying mechanism also includes a linkage rod and a second servo motor. The gears at the same end of the brackets on both sides are connected by the linkage rod. The second servo motor is installed on one of the brackets, and the second servo motor is connected to the transmission rod. The proofreading device also includes a clamping mechanism, which has two groups. The two groups of clamping mechanisms are both distributed on the bracket and connected with the chain transmission.

[0013] Preferably, the clamping mechanism includes a bearing plate, and three-axis cylinders are provided at both ends of the bearing plate; Connectors are provided at both ends of the load-bearing plate, the connectors on the load-bearing plate in the first clamping mechanism are connected to the chain, and the connectors on the load-bearing plate in the second clamping mechanism are slidably connected to the bracket; A limit rod is provided on the connecting piece of the carrier plate of the first clamping mechanism, and the limit rod is slidably connected with the connecting piece of the carrier plate of the second clamping mechanism; A second threaded rod and a third servo motor are arranged on the connecting piece of the carrier plate of the first clamping mechanism, the second threaded rod is rotatably connected to the connecting piece, and the second threaded rod penetrates the connecting piece of the carrier plate of the second clamping mechanism and is threadedly connected thereto.

[0014] Beneficial effects of the present invention: The present invention fixes the workpiece on a support frame, and then the longitudinal displacement control mechanism drives the proofreading rod to move downward. The number of proofreading rods is consistent with the number of punching holes on the workpiece. If a hole is missed during the downward movement of the proofreading rod, the proofreading rod will be blocked and stop moving downward. Normal punching will allow the proofreading rod to move downward normally and compress the pressure detector. If the punching hole is slightly offset and the proofreading rod is still able to pass through the punching hole smoothly due to its smaller diameter than the punching hole, this requires secondary verification. The measurement control mechanism drives the measuring rod to extend from the opening of the proofreading rod. The industrial computer determines whether the proofreading rod is at the center of the punching hole based on the amount of extension of the measuring rod, thereby determining whether the punching hole is offset. This solves the problem of the punching hole being offset but still being judged as a qualified punching hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front view of the support frame, the calibration rod, the pressure detector, the measuring rod and the measuring control mechanism of the present invention; Figure 3 for Figure 2 A magnified image of point A; Figure 4 It is a schematic diagram of the internal structure of the support frame, the calibration rod, the pressure detector, the measuring rod and the measuring control mechanism of the present invention; Figure 5 for Figure 4 The enlarged view of point B; Figure 6 is a side view of the present invention; Figure 7 It is a three-dimensional structural schematic diagram of the conveying mechanism and the clamping mechanism of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of the clamping mechanism of the present invention.

[0017] The numbers in the figure are: 1-support frame; 2-calibration rod; 21-first frame; 22-second frame; 23-first limit plate; 24-first elastic element; 3-longitudinal displacement control mechanism; 31-vertical plate; 32-connecting plate; 33-first threaded rod; 34-first servo motor; 4-pressure detector; 41-ring plate; 42-guide rod; 43-second limit plate; 44-second elastic element; 45-pressure sensor; 5-measuring rod; 6-measuring control mechanism; 61-contraction assembly; 611- Connecting plate; 612-connecting rod; 613-third limiting plate; 614-third elastic element; 62-connecting rod; 63-adsorption plate; 64-electromagnet; 65-infrared distance sensor; 7-conveying mechanism; 71-bracket; 72-chain; 73-gear; 74-connecting rod; 75-second servo motor; 8-clamping mechanism; 81-carrying plate; 82-three-axis cylinder; 83-connecting piece; 84-limiting rod; 85-second threaded rod; 86-third servo motor; 9-workpiece. DETAILED DESCRIPTION

[0018] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0019] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] In a first aspect of the present invention, a device for calibrating automobile parts is provided, such as Figures 1 to 4 As shown, it includes a support frame 1, and the proofreading device also includes a proofreading rod 2 with an elastic structure and a longitudinal displacement control mechanism 3 arranged on the support frame 1. During the process in which the longitudinal displacement control mechanism 3 drives the proofreading rod 2 to move longitudinally, the proofreading rod 2 will stop moving after being blocked; A pressure detector 4 is provided on the support frame 1, and the pressure detector 4 corresponds to the calibration rod 2; The calibration rod 2 is provided with an opening, and a measuring rod 5 is provided in the opening; The calibration device also includes a measurement control mechanism 6, which is used to drive the measuring rod 5 to extend from the opening and contact the inner wall of the punching hole.

[0021] In this embodiment, the staff fixes the workpiece 9 on the support frame 1, and then the longitudinal displacement control mechanism 3 starts to work. The longitudinal displacement control mechanism 3 drives the proofreading rod 2 to move downward. The number of proofreading rods 2 is consistent with the number of punching holes on the workpiece 9. If there is a problem of missing punching holes during the downward movement of the proofreading rod 2, the proofreading rod 2 will be blocked and stop moving downward. Normal punching will make the proofreading rod 2 move down normally and compress the pressure detector 4. The pressure detector 4 is electrically connected to the industrial computer, so that the industrial computer can know how many proofreading rods 2 have successfully passed through the punching holes, and reversely know whether there are proofreading rods 2 that have not passed through the punching holes, and judge whether there are any missing punching holes; If the punching hole has a slight offset and the proofreading rod 2 can still pass through the punching hole smoothly because its diameter is smaller than the punching hole, this needs to be verified through a secondary verification. Specifically, the measurement control mechanism 6 drives the measuring rod 5 to extend from the opening of the proofreading rod 2. The industrial computer determines whether the proofreading rod 2 is at the center of the punching hole based on the extension amount of the measuring rod 5, thereby determining whether the punching hole has an offset.

[0022] As an implementation method, Figure 2 As shown, further: A first frame body 21 and a second frame body 22 arranged below the first frame body 21 are arranged on the upper part of the proofreading rod 2. The top end of the proofreading rod 2 passes through the second frame body 22 and the lower edge of the first frame body 21 in sequence. A sliding bearing is sleeved on the proofreading rod 2, and the sliding bearing is fixedly installed on the second frame body 22. A first limiting plate 23 is arranged on the top end of the proofreading rod 2, and the first limiting plate 23 is higher than the lower edge of the first frame body 21. A first elastic element 24 for pushing the proofreading rod 2 to descend is arranged inside the first frame body 21.

[0023] In this embodiment, the moving direction of the proofreading rod 2 is moved by the sliding bearing on the second frame 22. The sliding bearing can also be replaced by an oil-free bushing, etc., but is not limited to this. The first elastic element 24 is a spring in this solution, which pushes the top of the proofreading rod 2 to put it in an extended state, and when the proofreading rod 2 is obstructed, it can stop moving due to the retraction amount of the spring. The first limit plate 23 controls the extension distance of the proofreading rod 2 and prevents it from leaving the first frame 21.

[0024] As an implementation method, Figure 3 As shown, further: The pressure detector 4 includes a ring plate 41, which is located below the proofreading rod 2. A guide rod 42 is arranged below the ring plate 41, which passes through the support frame 1 and is slidably connected thereto. A second limit plate 43 is arranged at the bottom end of the guide rod 42, and the second limit plate 43 is located below the support frame 1. A second elastic element 44 is sleeved on the guide rod 42, and the two ends of the second elastic element 44 respectively abut the support frame 1 and the ring plate 41. A pressure sensor 45 is arranged on the support frame 1, and the pressure sensor 45 is located below the ring plate 41.

[0025] In this embodiment, if the problem of missing punching occurs during the downward movement of the proofreading rod 2, the proofreading rod 2 will be blocked and stop moving downward. Normal punching will allow the proofreading rod 2 to move downward normally and press the ring body. After the ring body is pressed, it will transmit the force to the detection end of the pressure sensor 45. The pressure sensor 45 is electrically connected to the industrial computer, so that the industrial computer can know how many proofreading rods 2 have successfully passed through the punching holes. The second elastic element 44 is a spring in the present embodiment, and the second elastic element 44 is used to push the ring piece 41 to always be above the detection end of the pressure sensor 45, so as to prevent the ring piece 41 from pressing the pressure sensor 45 and causing false pressure touch. The guide rod 42 is used to move the moving direction of the ring piece 41, and the second limit plate 43 is used to prevent the second elastic element 44 from pushing the ring piece 41 to make it disconnected from the support frame 1.

[0026] As an implementation method, Figure 4 and Figure 5 As shown, further: An inner cavity is formed inside the calibration rod 2, the measuring rod 5 is symmetrically arranged on the calibration rod 2 and slidably connected through the opening, and the measuring control mechanism 6 includes a retracting component 61 for controlling the measuring rod 5 to retract into the inner cavity, and the retracting component 61 is arranged inside the inner cavity; The measurement control mechanism 6 also includes a connecting rod 62, which is transmission-connected to the measuring rod 5. An adsorption sheet 63 is provided at the bottom end of the connecting rod 62. An electromagnet 64 is provided on the support frame 1, and the electromagnet 64 is located below the adsorption sheet 63. An infrared distance sensor 65 is also provided on the support frame 1, and the infrared distance sensor 65 faces the bottom end of the connecting rod 62.

[0027] The shrinkage assembly 61 includes a connecting piece 611, which is located in the inner cavity of the calibration rod 2. A connecting rod 612 is symmetrically arranged on the connecting piece 611. One end of the connecting rod 612 is hinged to the connecting piece 611, and the other end of the connecting rod 612 is hinged to one end of the measuring rod 5. The top of the connecting rod 62 is fixedly connected to the bottom of the connecting piece 611. A third limiting piece 613 is arranged inside the inner cavity, and the third limiting piece 613 is located below the connecting piece 611. A third elastic element 614 is sleeved on the connecting rod 62, and the two ends of the third elastic element 614 respectively resist the connecting piece 611 and the third limiting piece 613.

[0028] In this embodiment, if the punching hole is slightly offset and the proofreading rod 2 can still pass through the punching hole smoothly because its diameter is smaller than that of the punching hole, this needs to be verified twice. The measuring control mechanism 6 starts to work, and the electromagnet 64 in the measuring control mechanism 6 is energized and magnetically attracts the adsorption sheet 63 at the bottom end of the connecting rod 62. The adsorption sheet 63 is made of iron material in this embodiment. The electromagnet 64 attracts the adsorption sheet 63 to descend, and the adsorption sheet 63 drives the connecting rod 62 to descend with it. During the descent, the connecting sheet 611 will overcome the preload force of the third elastic element 614 and descend. The third elastic element 614 is a spring in this embodiment. The connecting sheet 611 drives the measuring rods 5 on both sides thereof to extend from the opening of the proofreading rod 2 through the connecting rod 612. Due to the action of the electromagnet 64, the measuring rod 5 will continue to move until the end of the measuring rod 5 contacts the inner wall of the punching hole. Since the distance between the bottom end of the connecting rod 62 and the detection end of the infrared distance sensor 65 is proportional to the extension distance of the measuring rod 5, the extension amount of the measuring rod 5 can be inferred by the infrared distance sensor 65 to determine whether the proofreading rod 2 is at the center position of the punching hole.

[0029] As an implementation method, Figure 6 As shown, further: The longitudinal displacement control mechanism 3 includes a vertical plate 31 and a connecting plate 32. The vertical plate 31 is arranged on one side of the support frame 1 and is fixedly connected thereto. The calibration rods 2 are distributed below the connecting plate 32. The connecting plate 32 has an extension portion. The vertical plate 31 is provided with a longitudinal slot. The extension portion of the connecting plate 32 passes through the longitudinal slot and is slidably connected thereto. A first threaded rod 33 is provided on the vertical plate 31, and the first threaded rod 33 is rotatably connected to the vertical plate 31. The first threaded rod 33 passes through the extended portion of the connecting plate 32, and the first threaded rod 33 is threadedly connected to the connecting plate 32. A first servo motor 34 is also provided on the vertical plate 31 and fixedly connected thereto, and the output shaft of the first servo motor 34 is transmission-connected to the first threaded rod 33.

[0030] In this embodiment, the longitudinal displacement control mechanism 3 starts to work, and the output shaft of the first servo motor 34 drives the first threaded rod 33 to rotate. Since the extension portion of the connecting plate 32 is connected to the vertical plate 31 through longitudinal sliding, and the first threaded rod 33 passes through the extension portion of the connecting plate 32 and is threadedly connected thereto, the connecting plate 32 will be driven to descend along the longitudinal slide groove of the vertical plate 31 during the rotation of the first threaded rod 33, and the connecting plate 32 will also drive multiple groups of proofreading rods 2 to move with it.

[0031] As an implementation method, Figure 7 and Figure 8 As shown, further: The proofreading device further includes a conveying mechanism 7, which includes a bracket 71 and a chain 72. The bracket 71 is symmetrically arranged on both sides of the support frame 1, and the chain 72 is distributed on the bracket 71 on both sides; Gears 73 are provided at both ends of the bracket 71, and the chains 72 are respectively sleeved on the gears 73 at both ends of the bracket 71 and meshed therewith; The conveying mechanism 7 also includes a linkage rod 74 and a second servo motor 75. The gears 73 at the same end of the brackets 71 on both sides are connected by the linkage rod 74. The second servo motor 75 is installed on one of the brackets 71, and the second servo motor 75 is connected to the transmission rod. The proofreading device further comprises a clamping mechanism 8 , which comprises two groups. The two groups of clamping mechanisms 8 are both distributed on the bracket 71 and are transmission-connected to the chain 72 .

[0032] The clamping mechanism 8 includes a bearing plate 81, and three-axis cylinders 82 are provided at both ends of the bearing plate 81; Connectors 83 are provided at both ends of the carrier plate 81. The connectors 83 on the carrier plate 81 in the first clamping mechanism 8 are connected to the chain 72, and the connectors 83 on the carrier plate 81 in the second clamping mechanism 8 are slidably connected to the bracket 71. A limit rod 84 is provided on the connecting piece 83 of the bearing plate 81 of the first clamping mechanism 8, and the limit rod 84 is slidably connected to the connecting piece 83 of the bearing plate 81 of the second clamping mechanism 8; A second threaded rod 85 and a third servo motor 86 are provided on the connecting piece 83 of the supporting plate 81 of the first clamping mechanism 8. The second threaded rod 85 is rotatably connected to the connecting piece 83. The second threaded rod 85 passes through the connecting piece 83 of the supporting plate 81 of the second clamping mechanism 8 and is threadedly connected thereto.

[0033] In this embodiment, during the preliminary preparation, the workpiece 9 is placed at the loading and unloading end of the conveying mechanism 7. Specifically, the distance between the two sets of clamping mechanisms 8 is controlled according to the size of the workpiece 9. The distance between the two sets of clamping mechanisms 8 is driven by the third servo motor 86 to drive the second threaded rod 85. The second threaded rod 85 drives the connecting piece 83 of the two clamping mechanisms 8 to approach it. The guide rod 42 on the other side is used to guide the connecting piece 83 of the two clamping mechanisms 8, thereby controlling the distance between the bearing plates 81 of the two sets of clamping mechanisms 8, placing the workpiece 9 on the two bearing plates 81, and then clamping it by extending the three-axis cylinders 82 at the four corners at the same time. The conveying mechanism 7 starts to work, and the second servo motor 75 drives the gear 73 at the same end of the two brackets 71 to rotate through the connecting rod 74, and drives the chain 72 to move through the gear 73. The chains 72 on both sides then drive one clamping mechanism 8 to move, and then drive the second clamping mechanism 8 and the workpiece 9 on the two sets of clamping mechanisms 8 to move to the proofreading station.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0035] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A proofreading device for automobile parts, comprising a support frame (1), characterized in that: The calibration device further comprises a calibration rod (2) having an elastic structure and a longitudinal displacement control mechanism (3) arranged on the support frame (1); when the longitudinal displacement control mechanism (3) drives the calibration rod (2) to move longitudinally, the calibration rod (2) stops moving after being blocked; A pressure detector (4) is provided on the support frame (1), and the pressure detector (4) corresponds to the calibration rod (2); An opening is provided on the calibration rod (2), and a measuring rod (5) is provided in the opening; The calibration device also includes a measurement control mechanism (6), which is used to drive the measurement rod (5) to extend from the opening and contact the inner wall of the punching hole.

2. The automobile parts calibration device according to claim 1, characterized in that: A first frame (21) and a second frame (22) arranged below the first frame (21) are arranged on the upper part of the proofreading rod (2); the top end of the proofreading rod (2) passes through the second frame (22) and the lower edge of the first frame (21) in sequence; a sliding bearing is sleeved on the proofreading rod (2), and the sliding bearing is fixedly mounted on the second frame (22); a first limiting piece (23) is arranged on the top end of the proofreading rod (2), and the first limiting piece (23) is higher than the lower edge of the first frame (21); and a first elastic element (24) for pushing the proofreading rod (2) to descend is arranged inside the first frame (21).

3. The automobile parts calibration device according to claim 2, characterized in that: The pressure detector (4) comprises a ring plate (41), wherein the ring plate (41) is located below the calibration rod (2); a guide rod (42) is arranged below the ring plate (41); the guide rod (42) penetrates the support frame (1) and is slidably connected thereto; a second limit plate (43) is arranged at the bottom end of the guide rod (42), and the second limit plate (43) is located below the support frame (1); a second elastic element (44) is sleeved on the guide rod (42), and two ends of the second elastic element (44) respectively abut against the support frame (1) and the ring plate (41); a pressure sensor (45) is arranged on the support frame (1), and the pressure sensor (45) is located below the ring plate (41).

4. The automobile parts calibration device according to claim 2, characterized in that: An inner cavity is formed inside the calibration rod (2); the measuring rod (5) is symmetrically arranged on the calibration rod (2) and is slidably connected via an opening; the measuring control mechanism (6) comprises a retracting component (61) for controlling the measuring rod (5) to retract into the inner cavity; the retracting component (61) is arranged inside the inner cavity; The measurement control mechanism (6) further comprises a connecting rod (62) which is transmission-connected to the measuring rod (5); an adsorption sheet (63) is arranged at the bottom end of the connecting rod (62); an electromagnet (64) is arranged on the support frame (1), and the electromagnet (64) is located below the adsorption sheet (63); an infrared distance sensor (65) is also arranged on the support frame (1), and the infrared distance sensor (65) faces the bottom end of the connecting rod (62).

5. The automobile parts calibration device according to claim 4, characterized in that: The contraction assembly (61) comprises a connecting piece (611), the connecting piece (611) is located in the inner cavity of the calibration rod (2), connecting rods (612) are symmetrically arranged on the connecting piece (611), one end of the connecting rod (612) is hinged to the connecting piece (611), and the other end of the connecting rod (612) is hinged to one end of the measuring rod (5), the top end of the connecting rod (62) is fixedly connected to the bottom of the connecting piece (611), a third limiting piece (613) is arranged inside the inner cavity, and the third limiting piece (613) is located below the connecting piece (611), and a third elastic element (614) is sleeved on the connecting rod (62), and the two ends of the third elastic element (614) respectively abut against the connecting piece (611) and the third limiting piece (613).

6. The automobile parts calibration device according to claim 1, characterized in that: The longitudinal displacement control mechanism (3) comprises a vertical plate (31) and a connecting plate (32), wherein the vertical plate (31) is arranged on one side of the support frame (1) and is fixedly connected thereto, the calibration rods (2) are distributed and arranged below the connecting plate (32), the connecting plate (32) has an extension portion, the vertical plate (31) is provided with a longitudinal slide groove, and the extension portion of the connecting plate (32) passes through the longitudinal slide groove and is slidably connected thereto; A first threaded rod (33) is provided on the vertical plate (31), and the first threaded rod (33) is rotatably connected to the vertical plate (31), the first threaded rod (33) passes through an extension portion of the connecting plate (32), and the first threaded rod (33) is threadedly connected to the connecting plate (32), a first servo motor (34) is also provided on the vertical plate (31) and is fixedly connected thereto, and an output shaft of the first servo motor (34) is drivingly connected to the first threaded rod (33).

7. The automobile parts calibration device according to claim 1, characterized in that: It also includes a conveying mechanism (7), the conveying mechanism (7) including a bracket (71) and a chain (72), the bracket (71) is symmetrically arranged on both sides of the support frame (1), and the chain (72) is distributed on the brackets (71) on both sides; Gears (73) are provided at both ends of the bracket (71), and the chains (72) are respectively sleeved on the gears (73) at both ends of the bracket (71) and meshed therewith; The conveying mechanism (7) further comprises a connecting rod (74) and a second servo motor (75); the gears (73) at the same end of the brackets (71) on both sides are connected in transmission via the connecting rod (74); the second servo motor (75) is mounted on one of the brackets (71), and the second servo motor (75) is connected to the transmission rod; The proofreading device also includes a clamping mechanism (8), which includes two groups of clamping mechanisms (8). The two groups of clamping mechanisms (8) are both distributed on the bracket (71) and are transmission-connected to the chain (72).

8. The automobile parts calibration device according to claim 7, characterized in that: The clamping mechanism (8) comprises a bearing plate (81), and three-axis cylinders (82) are provided at both ends of the bearing plate (81); Connecting members (83) are provided at both ends of the bearing plate (81), the connecting members (83) on the bearing plate (81) in the first clamping mechanism (8) are connected to the chain (72), and the connecting members (83) on the bearing plate (81) in the second clamping mechanism (8) are slidably connected to the bracket (71); A limit rod (84) is provided on the connecting piece (83) of the bearing plate (81) of the first clamping mechanism (8), and the limit rod (84) is slidably connected to the connecting piece (83) of the bearing plate (81) of the second clamping mechanism (8); A second threaded rod (85) and a third servo motor (86) are provided on a connecting piece (83) of a supporting plate (81) of the first clamping mechanism (8), the second threaded rod (85) being rotatably connected to the connecting piece (83), the second threaded rod (85) passing through the connecting piece (83) of the supporting plate (81) of the second clamping mechanism (8) and being threadedly connected thereto.

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