An automobile sheet metal part surface concave-convex defect detection tool and method

Abstract

The application relates to the technical field of finished product inspection of sheet metal parts, and discloses an automobile sheet metal part surface concave-convex defect detection tool and method, which comprises moving rails, first connecting blocks fixedly connected to the front ends of the two moving rails, second connecting blocks fixedly connected to the rear ends of the two moving rails, a transmission shaft rotationally connected between the two second connecting blocks, a turnover mechanism arranged on the left side of the left moving rail, the turnover mechanism being used for overturning the sheet metal part, sliding grooves formed in the upper and lower sides of the two moving rails, and a middle connecting piece slidingly connected between the two moving rails. The sheet metal part is placed on four first suction discs, then a driving motor provides power to drive a threaded rod to rotate, so that the middle connecting piece can move forwards and backwards, a 3D scanner further scans the surface of the sheet metal part and establishes a model, personnel do not need to detect around the automobile sheet metal part, and the whole detection process is faster and more labor-saving.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of finished sheet metal part inspection, in particular to an automobile sheet metal part surface concave-convex defect detection tool and method. BACKGROUND

[0002] The automobile sheet metal part refers to the part processed from the metal sheet in the automobile body and its components, which usually includes the body shell, door, engine cover, trunk cover, fender, and the main function of the sheet metal part is to provide structural strength, protect the passengers and support various accessories and functional devices. After the automobile sheet metal part is produced and processed, a sheet metal part surface concave-convex defect detection tool is needed to detect whether the surface of the sheet metal part has concave-convex defects.

[0003] The existing automobile sheet metal part surface concave-convex defect detection tool needs the workers to detect the sheet metal part point by point around the automobile sheet metal part, which is time-consuming and laborious, and new defects are caused when the automobile sheet metal part is clamped and transferred. The existing automobile sheet metal part surface concave-convex defect detection tool uses the principle of light reflection and refraction to identify the surface unevenness, and the detection result is highly dependent on the experience and judgment of the operator, and the change of the surrounding light will affect the detection result, which is easy to cause misjudgment. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides an automobile sheet metal part surface concave-convex defect detection tool and method, which solves the problems of time-consuming and laborious detection process, new defects caused by clamping and transferring, and dependence on the experience and judgment of the operator and the influence of the surrounding light.

[0005] In order to achieve the above object, the present application is realized by the following technical scheme: a kind of automobile sheet metal surface concave-convex defect detection tool, including mobile rail, the first connecting block is fixedly connected at the front end of two mobile rails, the second connecting block is fixedly connected at the rear end of two mobile rails, transmission shaft is rotatably connected between two second connecting blocks, left side mobile rail left side is provided with turnover mechanism, and the turnover mechanism is used to overturn sheet metal, sliding groove is set up in the upper and lower sides of two mobile rails, and middle connecting piece is slidably connected between two mobile rails, second connecting piece is fixedly connected at the top of middle connecting piece, two supporting arms are fixedly connected on the front and back sides of second connecting piece, first suction disc is rotatably connected at the outer end of supporting arm, first connecting piece is fixedly connected at the bottom of middle connecting piece, limiting plate is arranged between the front and back sides of two mobile rails, limiting screw is threadedly connected at the left and right ends of opposite side of two limiting plates, sealing cover is fixedly connected between the top of two second connecting blocks, right side second connecting block right side is fixedly connected with speed reducer, driving bevel gear is fixedly connected on the surface of transmission shaft, driven bevel gear is meshingly connected at the front side of driving bevel gear, screw rod is fixedly connected at the front side center position of driven bevel gear, detection mechanism is arranged on the top of sealing cover, and the detection mechanism is used to detect the concave-convex defect of sheet metal surface, screw rod is rotatably connected with connecting strip, and screw rod extends to the front side of middle connecting piece and is threadedly connected with middle connecting piece.

[0006] Preferably, the turnover mechanism includes a fixed plate, the fixed plate is fixedly connected with the left side mobile rail, a support column is slidably connected to the top of the fixed plate, second hydraulic cylinders are fixedly connected to the left and right sides of the support column, the output ends of the two second hydraulic cylinders are fixedly connected with the left side mobile rail, a support block is fixedly connected to the top of the right side of the support column, a first hydraulic cylinder is fixedly connected to the top of the support block, a sliding block is fixedly connected to the output end of the first hydraulic cylinder, a first steering wheel is fixedly connected to the front side of the sliding block, a double-shaft air cylinder is fixedly connected to the output end of the first steering wheel, extension rods are fixedly connected to the front and back output ends of the double-shaft air cylinder, and second suction discs are fixedly connected to the top of the two extension rods.

[0007] Preferably, the detection mechanism includes two connecting strips, the connecting strips are fixedly connected with the sealing cover, a 3D scanner is rotatably connected between the two connecting strips, a second steering wheel is fixedly connected to the right side of the right connecting strip, and the output end of the second steering wheel is fixedly connected with the 3D scanner.

[0008] Preferably, the two first connecting blocks are fixedly connected with support legs on the front side, longitudinally fixedly connected with longitudinal beams between the left and right adjacent support legs, transversely fixedly connected with horizontal beams between the front and rear two support legs, and fixedly connected with the inclined support between the right horizontal beam, and the top of the two front support legs is fixedly connected with an infrared emitter.

[0009] Preferably, the reducer is fixedly connected with a driving motor at the bottom, the output end of the driving motor is fixedly connected with the input end of the reducer, and the output end of the reducer is fixedly connected with the transmission shaft.

[0010] Preferably, the support block is fixedly connected with a limiting column at the bottom, the limiting column penetrates and extends to the bottom of the sliding block, the limiting column and the sliding block are slidably connected, the limiting column and the support column are fixedly connected, and the rear bottom of the support column is fixedly connected with a second vacuum pump.

[0011] Preferably, a second placing groove is formed at the bottom center of the first connecting piece, a first vacuum pump is arranged in the second placing groove, and the first vacuum pump is fixedly connected with the first connecting piece.

[0012] Preferably, the top of the two first connecting blocks is provided with a first placing groove, and an infrared receiver is arranged in the two first placing grooves and fixedly connected with the first connecting block.

[0013] Preferably, the second connecting piece is fixedly connected with pulleys on the left and right sides of the first connecting piece, and the pulleys are located in the sliding groove.

[0014] Preferably, a method for detecting the concave-convex defects on the surface of an automobile sheet metal part comprises the following specific steps:

[0015] Step one: first, one end of the gas pipe is connected to the output end of the first vacuum pump, and the other end is connected to a five-way joint; four pipes are further extended from the four ports at the top of the five-way joint and connected to the first suction disc; one end of the second gas pipe is connected to the output end of the second vacuum pump; a three-way joint is connected to the other end of the second gas pipe; two pipes are extended from the other two joints of the three-way joint and connected to the second suction disc; and the automobile sheet metal part is placed between the four first suction discs; then the first vacuum pump is started to remove the air between the automobile sheet metal part and the first suction disc.

[0016] Step two: the drive motor starts to drive the reduction gear to work, the reduction gear increases the torque to drive the transmission shaft to rotate, with the rotation of the transmission shaft drives the driving bevel gear to rotate, and the driving bevel gear is engaged with the driven bevel gear to drive the driven bevel gear to rotate, the driven bevel gear rotates to drive the threaded rod to rotate, the rotating threaded rod is in threaded motion with the middle connecting piece, so that the middle connecting piece slides back and forth between the two moving rails, with the movement of the middle connecting piece drives the first connecting piece and the second connecting piece to move together, and when the first connecting piece and the second connecting piece move, the four pulleys roll back and forth in the sliding groove, and the second connecting piece drives the four first suction cups and the automobile sheet metal parts to move together.

[0017] Step three: further with the movement of the automobile sheet metal part driven by the drive motor, the second steering gear also starts to work, the output end of the steering gear drives the 3D scanner to turn, adjusts the angle with the movement of the automobile sheet metal part, scans the surface of the automobile sheet metal part in grid and constructs the model, the grid mapping projection of the 3D scanner is pasted on the surface of the automobile sheet metal part, which can clearly map the concave and convex defects on the surface of the automobile sheet metal part, and the corresponding concave and convex defects are constructed on the model at the same time, then with the movement of the automobile sheet metal part, when the automobile sheet metal part moves to the front end, the automobile sheet metal part blocks the infrared emitter to emit infrared signal, so that the infrared receiver cannot receive the signal, the first vacuum pump stops working, so that the suction force of the first suction cup on the automobile sheet metal part is weakened.

[0018] Step four: further, the two second hydraulic cylinders are synchronously extended and retracted to adjust the position of the supporting column, so that the two second suction cups are located at the central axis of the automobile sheet metal part, then the two output ends of the double-shaft air cylinder respectively push one extension rod in opposite directions, the first hydraulic cylinder retracts to pull the sliding block upward, then the first steering gear starts to rotate the double-shaft air cylinder by one hundred and eighty degrees so that the two second suction cups are downward, the first hydraulic cylinder extends the sliding block to push downward, the two second suction cups contact with the surface of the automobile sheet metal part, the second vacuum pump starts to pump out the air between the second suction cup and the automobile sheet metal part, then the first hydraulic cylinder retracts the sliding block upward, the first steering gear is opened to reverse by one hundred and eighty degrees, the first hydraulic cylinder extends the sliding block to push downward, so that the four first suction cups contact with the other side of the automobile sheet metal part.

[0019] Step five: finally, the first vacuum pump starts to work again to pump out the air between the suction cup and the automobile sheet metal part, then the second vacuum pump stops working, the second suction cup loses the adsorption force on the automobile sheet metal part, the two second hydraulic cylinders are synchronously extended to move the two extension rods to the left side, so that the two extension rods are away from the automobile sheet metal part between the second connecting piece and the automobile sheet metal part, the drive motor reverses to move the automobile sheet metal part to the right side, and the 3D scanner scans and detects the other side of the automobile sheet metal part.

[0020] The application provides a kind of automobile sheet metal surface concave-convex defect detection tool and method.There are following beneficial effects:

[0021] 1, the sheet metal is placed on four first suction cups, then the motor is driven to provide power to drive the threaded rod to rotate, so that the middle connector can move forward and backward, and further 3D scanner scans the surface of the sheet metal and establishes a model, without the need for staff to detect around the automobile sheet metal, the whole detection process is more rapid and labor-saving.

[0022] 2, the four first suction cups are used to limit the movement of the sheet metal, and then the two second suction cups are used to adsorb when the sheet metal is turned over, by forming a relative vacuum between the first suction cup or the second suction cup and the sheet metal, the sheet metal is not directly clamped and transferred, to avoid defects caused by clamping when transferring after detecting the sheet metal.

[0023] 3, the first suction cup with adjustable angle changes the angle of the sheet metal with different shapes and sizes, so as to adapt to sheet metals of various shapes and sizes, and the influence of environmental factors is not needed to be considered when detecting the sheet metal, so that the accuracy of the measurement result is more accurate, and the inspection quality is higher.

[0024] 4, the turning mechanism is used to automatically adsorb and turn over the sheet metal after scanning and detecting one side of the sheet metal, and the other side of the sheet metal is also detected for defects, without the need for staff intervention, the transfer, turning and scanning of the sheet metal can be automatically completed, the detection speed is improved, and the production line efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a perspective view of the automobile sheet metal surface concave-convex defect detection tool.

[0026] Figure 2 It is a top view of the automobile sheet metal surface concave-convex defect detection tool.

[0027] Figure 3 It is a schematic view of the middle connector of the automobile sheet metal surface concave-convex defect detection tool.

[0028] Figure 4 It is a schematic view of the driven bevel gear and the driving bevel gear of the automobile sheet metal surface concave-convex defect detection tool.

[0029] Figure 5 It is a schematic view of the turning mechanism of the automobile sheet metal surface concave-convex defect detection tool.

[0030] Figure 6It is a front view schematic view of a kind of automobile sheet metal part surface concave and convex defect detection tool of the application.

[0031] Wherein, 1, moving track; 2, support leg; 3, longitudinal beam; 4, crossbeam; 5, first connecting block; 6, first placement slot; 7, infrared emitter; 8, infrared receiver; 9, sliding groove; 10, first suction cup; 11, support arm; 12, first connecting piece; 13, second placement slot; 14, first vacuum pump; 15, middle connecting piece; 16, pulley; 17, second connecting piece; 18, sealing cover; 19, second connecting block; 20, driven bevel gear; 21, threaded rod; 22, driving motor; 23, speed reducer; 24, transmission shaft; 25, driving bevel gear; 26, first hydraulic cylinder; 27, sliding block; 28, first steering wheel; 29, double-shaft air cylinder; 30, extension rod; 31, second suction cup; 32, fixed plate; 33, second hydraulic cylinder; 34, second vacuum pump; 35, limiting column; 36, support column; 37, support block; 38, diagonal brace; 39, 3D scanner; 40, second steering wheel; 41, connecting strip; 42, limiting screw; 43, limiting plate. DETAILED DESCRIPTION

[0032] The technical solutions of the present application will be described clearly and completely below in combination with the drawings of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0033] Embodiment:

[0034] Please refer to the drawings of the present application Figure 1 -Appendix Figure 6The embodiment of the present application provides a kind of automobile sheet metal surface concave-convex defect detection tool, including mobile rail 1, two mobile rail 1 front end are fixedly connected with first connecting block 5, two mobile rail 1 rear end are fixedly connected with second connecting block 19, two second connecting block 19 are rotatably connected with transmission shaft 24, left mobile rail 1 left side is provided with turnover mechanism, and turnover mechanism is used to overturn sheet metal part, two mobile rail 1 upper and lower sides are all provided with sliding groove 9, two mobile rail 1 are slidably connected with middle connecting piece 15, and middle connecting piece 15 top is fixedly connected with second connecting piece 17, and second connecting piece 17 front and back sides are all fixedly connected with two support arms 11, and support arm 11 outer end is rotatably connected with first suction disc 10, and middle connecting piece 15 bottom is fixedly connected with first connecting piece 12, two mobile rail 1 between front and back sides are all provided with limit plate 43, and two limit plate 43 opposite sides are all threadedly connected with limit screw 42 left and right ends, two second connecting block 19 top are fixedly connected with sealing cover 18, right side second connecting block 19 right side is fixedly connected with speed reducer 23, transmission shaft 24 surface is fixedly connected with driving bevel gear 25, driving bevel gear 25 front side is meshingly connected with driven bevel gear 20, and driven bevel gear 20 front side center position is fixedly connected with threaded rod 21, sealing cover 18 top is provided with detection mechanism, and detection mechanism is used to detect sheet metal surface concave-convex defect, and threaded rod 21 is rotatably connected between connecting strip 41, threaded rod 21 is penetrated and extends to the front side of middle connecting piece 15, and threaded rod 21 is threadedly connected between middle connecting piece 15.

[0035] Turnover mechanism includes fixed plate 32, and fixed plate 32 is fixedly connected between left mobile rail 1, and fixed plate 32 top is slidably connected with support column 36, and support column 36 left and right sides are all fixedly connected with second hydraulic cylinder 33, and two second hydraulic cylinder 33 output ends are all fixedly connected between left mobile rail 1, and support column 36 right side top is fixedly connected with support block 37, and support block 37 top is fixedly connected with first hydraulic cylinder 26, and first hydraulic cylinder 26 output end is fixedly connected with sliding block 27, and sliding block 27 front side is fixedly connected with first steering wheel 28, and first steering wheel 28 output end is fixedly connected with double-shaft air cylinder 29, and double-shaft air cylinder 29 front and back sides output ends are all fixedly connected with extension rod 30, and two extension rod 30 tops are all fixedly connected with second suction disc 31.

[0036] Detection mechanism includes two connecting strips 41, and connecting strip 41 is fixedly connected between sealing cover 18, and two connecting strips 41 are rotatably connected with 3D scanner 39, and right side connecting strip 41 right side is fixedly connected with second steering wheel 40, and second steering wheel 40 output end is fixedly connected with 3D scanner 39.

[0037] The support legs 2 are fixedly connected between the left and right adjacent support legs 2, and the horizontal beams 4 are fixedly connected between the front and rear adjacent support legs 2.

[0038] The drive motor 22 is fixedly connected between the output end of the drive motor 22 and the input end of the speed reducer 23, and the speed reducer 23 is fixedly connected between the output end of the speed reducer 23 and the transmission shaft 24.

[0039] The limiting column 35 is fixedly connected to the bottom of the support block 37, and the limiting column 35 penetrates and extends to the bottom of the sliding block 27.

[0040] The second placing groove 13 is arranged in the bottom center position of the first connecting piece 12, and the first vacuum pump 14 is arranged in the second placing groove 13.

[0041] The first placing groove 6 is arranged in the top of the two first connecting blocks 5, and the infrared receiver 8 is arranged in the two first placing grooves 6.

[0042] The pulley 16 is fixedly connected to the left and right sides of the second connecting piece 17 and located in the sliding groove 9.

[0043] A method for detecting the concave-convex defects on the surface of an automobile sheet metal part comprises the following specific steps:

[0044] Step one: one end of the gas pipe is connected to the output end of the first vacuum pump 14, and the other end is connected to a five-way joint, and four pipes are further extended from the four ports at the top of the five-way joint and connected to the first suction disc 10, and one end of the second gas pipe is connected to the output end of the second vacuum pump 34, and a three-way joint is connected to the other end of the second gas pipe, and two pipes are extended from the other two joints of the three-way joint and connected to the second suction disc 31, and the automobile sheet metal part is placed between the four first suction discs 10, and then the first vacuum pump 14 is started to remove the air between the automobile sheet metal part and the first suction disc 10.

[0045] Step two: the driving motor 22 starts to drive the reduction gear 23 to work, the reduction gear 23 increases the torque to drive the transmission shaft 24 to rotate, with the rotation of the transmission shaft 24 drives the driving bevel gear 25 to rotate, and the driving bevel gear 25 is engaged with the driven bevel gear 20 to drive the driven bevel gear 20 to rotate, the driven bevel gear 20 drives the threaded rod 21 to rotate, the rotating threaded rod 21 is in threaded motion with the middle connecting piece 15, so that the middle connecting piece 15 slides back and forth between the two moving rails 1, with the movement of the middle connecting piece 15 drives the first connecting piece 12 and the second connecting piece 17 to move together, and when the first connecting piece 12 and the second connecting piece 17 move, the four pulleys 16 roll back and forth in the sliding groove 9, and the second connecting piece 17 drives the four first suction cups 10 to move together;

[0046] Step three: further with the movement of the automobile sheet metal part driven by the driving motor 22, the second steering gear 40 also starts to work, the output end of the steering gear 40 drives the 3D scanner 39 to turn, adjusts the angle with the movement of the automobile sheet metal part, scans the surface of the automobile sheet metal part in grid and constructs the model, the grid schematic projection mapped when the 3D scanner 39 scans fits the surface of the automobile sheet metal part, which can clearly map the concave and convex defects on the surface of the automobile sheet metal part, and at the same time construct the corresponding concave and convex defects on the model, then with the movement of the automobile sheet metal part, when the automobile sheet metal part moves to the front end, the automobile sheet metal part blocks the infrared signal emitted by the infrared emitter 7, so that the infrared receiver 8 cannot receive the signal, the first vacuum pump 14 stops working, so that the suction force of the first suction cup 10 on the automobile sheet metal part is weakened;

[0047] Step four: further, the two second hydraulic cylinders 33 are synchronously extended and retracted to adjust the position of the supporting column 36, so that the two second suction cups 31 are located at the center axis of the automobile sheet metal part, then the two output ends of the double-shaft air cylinder 29 respectively push an extension rod 30 in opposite directions, the first hydraulic cylinder 26 retracts to pull the sliding block 27 upward, then the first steering gear 28 starts to rotate the double-shaft air cylinder 29 by one hundred and eighty degrees to make the two second suction cups 31 downward, the first hydraulic cylinder 26 extends the sliding block 27 to push downward, the two second suction cups 31 contact with the surface of the automobile sheet metal part, the second vacuum pump 34 starts to pump out the air between the second suction cup 31 and the automobile sheet metal part, then the first hydraulic cylinder 26 retracts again to pull the sliding block 27 upward, the first steering gear 28 is opened to reverse by one hundred and eighty degrees, the first hydraulic cylinder 26 extends the sliding block 27 to push downward, so that the four first suction cups 10 contact with the other side of the automobile sheet metal part;

[0048] Step five: finally the first vacuum pump 14 starts working again to extract the air between the suction cup 10 and the automobile sheet metal part, then the second vacuum pump 34 stops working, the second suction cup 31 loses the adsorption force on the automobile sheet metal part, the two second hydraulic cylinders 33 synchronously extend, moving the two extension rods 30 to the left side, so that the two extension rods 30 move away from the second connecting piece 17 and the automobile sheet metal part, the driving motor 22 reverses, moving the middle connecting piece 15 backward, driving the automobile sheet metal part to move to the right side, and the 3D scanner 39 scans and detects the other side of the automobile sheet metal part.

[0049] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tool for detecting surface concave-convex defects of automobile sheet metal parts, comprising a movable rail (1), characterized in that: The front ends of the two movable rails (1) are fixedly connected to a first connecting block (5), the rear ends of the two movable rails (1) are fixedly connected to a second connecting block (19), a transmission shaft (24) is rotatably connected between the two second connecting blocks (19), a flip mechanism is provided on the left side of the left movable rail (1), and the flip mechanism is used to flip the sheet metal part, the upper and lower sides of the two movable rails (1) are provided with sliding grooves (9), a middle connecting piece (15) is slidably connected between the two movable rails (1), the top of the middle connecting piece (15) is fixedly connected to a second connecting piece (17), the front and rear sides of the second connecting piece (17) are fixedly connected to two support arms (11), the outer ends of the support arms (11) are rotatably connected to the first suction cup (10), the bottom of the middle connecting piece (15) is fixedly connected to the first connecting piece (12), and the front and rear sides of the two movable rails (1) are provided with A limit plate (43), both left and right ends of the opposite sides of the two limit plates (43) are threadedly connected to a limit screw (42), a sealing cover (18) is fixedly connected between the tops of the two second connecting blocks (19), a reducer (23) is fixedly connected to the right side of the second connecting block (19), a driving bevel gear (25) is fixedly connected to the surface of the transmission shaft (24), the front side of the driving bevel gear (25) is meshedly connected to the driven bevel gear (20), a threaded rod (21) is fixedly connected at the center position of the front side of the driven bevel gear (20), a detection mechanism is provided on the top of the sealing cover (18), the detection mechanism is used to detect concave and convex defects on the surface of the sheet metal part, the threaded rod (21) is rotatably connected to the connecting bar (41), the threaded rod (21) passes through and extends to the front side of the middle connecting piece (15), and the threaded rod (21) is threadedly connected to the middle connecting piece (15); The detection mechanism includes two connecting bars (41), the connecting bars (41) are fixedly connected to the sealing cover (18), a 3D scanner (39) is rotatably connected between the two connecting bars (41), a second steering gear (40) is fixedly connected to the right side of the right connecting bar (41), and an output end of the second steering gear (40) is fixedly connected to the 3D scanner (39); The front sides of the two first connecting blocks (5) and the rear sides of the two second connecting blocks (19) are fixedly connected to support legs (2); a longitudinal beam (3) is fixedly connected between the left and right adjacent support legs (2); a cross beam (4) is fixedly connected between the two front and rear adjacent support legs (2); the right cross beam (4) is fixedly connected to the diagonal brace (38); and the tops of the two front support legs (2) are fixedly connected to infrared emitters (7); The bottom of the reducer (23) is fixedly connected to a driving motor (22), the output end of the driving motor (22) is fixedly connected to the input end of the reducer (23), and the output end of the reducer (23) is fixedly connected to the transmission shaft (24).

2. The tool for detecting uneven defects on the surface of automobile sheet metal parts according to claim 1, characterized in that: The flip mechanism comprises a fixed plate (32), the fixed plate (32) being fixedly connected to the left movable rail (1), a support column (36) being slidably connected to the top of the fixed plate (32), a second hydraulic cylinder (33) being fixedly connected to the left and right sides of the support column (36), the output ends of the two second hydraulic cylinders (33) being fixedly connected to the left movable rail (1), a support block (37) being fixedly connected to the top of the right side of the support column (36), a first hydraulic cylinder (26) being fixedly connected to the top of the support block (37), a first steering gear (28) being fixedly connected to the output end of the first steering gear (28), a double-axis cylinder (29) being fixedly connected to the output ends of the double-axis cylinder (29), an extension rod (30) being fixedly connected to the front and rear output ends of the double-axis cylinder (29), and a second suction cup (31) being fixedly connected to the tops of the two extension rods (30).

3. The tool for detecting uneven defects on the surface of automobile sheet metal parts according to claim 2, characterized in that: The bottom of the support block (37) is fixedly connected to a limiting column (35), the limiting column (35) passes through and extends to the bottom of the sliding block (27), the limiting column (35) and the sliding block (27) are slidably connected, the limiting column (35) and the support column (36) are fixedly connected, and the rear bottom of the support column (36) is fixedly connected to a second vacuum pump (34).

4. The tool for detecting uneven defects on the surface of automobile sheet metal parts according to claim 1, characterized in that: A second placement groove (13) is provided at the center of the bottom of the first connecting member (12), a first vacuum pump (14) is provided in the second placement groove (13), and the first vacuum pump (14) is fixedly connected to the first connecting member (12).

5. The tool for detecting uneven defects on the surface of automobile sheet metal parts according to claim 1, characterized in that: A first placement groove (6) is provided on the top of the two first connection blocks (5), and an infrared receiver (8) is provided in each of the two first placement grooves (6). The infrared receiver (8) is fixedly connected to the first connection block (5).

6. The tool for detecting uneven defects on the surface of automobile sheet metal parts according to claim 1, characterized in that: The second connecting member (17) and the first connecting member (12) are both fixedly connected with pulleys (16) on the left and right sides, and the pulleys (16) are located in the sliding grooves (9).

7. The method for detecting uneven defects on the surface of automobile sheet metal parts according to claim 1, characterized in that: The specific steps include: Step 1: First, one end of the air pipe is connected to the output end of the first vacuum pump (14), and the other end is connected to a five-way joint. Four pipes are further extended from the four ports on the top of the five-way joint and connected to the first suction cup (10). At the same time, one end of the second air pipe is connected to the output end of the second vacuum pump (34). Then, a three-way joint is used to connect the other end of the second air pipe, and two pipes are extended from the other two joints of the three-way joint to be connected to the second suction cup (31). The automobile sheet metal is further placed between the four first suction cups (10). After that, the first vacuum pump (14) is started to extract the air between the automobile sheet metal and the first suction cup (10); Step 2: The driving motor (22) starts and drives the reducer (23) to work. The reducer (23) increases the torque and drives the transmission shaft (24) to rotate. As the transmission shaft (24) rotates, the driving bevel gear (25) is driven to rotate, and the driving bevel gear (25) is engaged with the driven bevel gear (20) to drive the driven bevel gear (20) to rotate. The driven bevel gear (20) rotates and drives the threaded rod (21) to rotate. The rotating threaded rod (21) and the intermediate connection member (15) perform a threaded motion, so that the intermediate connection member (15) slides back and forth between the two movable rails (1). As the intermediate connection member (15) moves, the first connection member (12) and the second connection member (17) are driven to move together. When the first connection member (12) and the second connection member (17) move, the four pulleys (16) roll back and forth in the sliding groove (9). At the same time, the second connection member (17) drives the four automobile sheet metal parts on the first suction cup (10) to move together. Step 3: As the driving motor (22) works and the automobile sheet metal part moves, the second servo (40) also starts working, and the output end of the servo (40) drives the 3D scanner (39) to turn. As the automobile sheet metal part moves and adjusts its angle, the surface of the automobile sheet metal part is grid-scanned and a model is constructed. When the 3D scanner (39) scans, the grid mapped is projected onto the surface of the automobile sheet metal part, and the concave and convex defects on the surface of the automobile sheet metal part can be clearly mapped out, and the corresponding concave and convex defects can be constructed on the model at the same time. Then, as the automobile sheet metal part moves, when the automobile sheet metal part moves to the front end, the automobile sheet metal part blocks the infrared transmitter (7) from transmitting the infrared signal, so that the infrared receiver (8) cannot receive the signal, and the first vacuum pump (14) stops working, so that the suction force of the first suction cup (10) on the automobile sheet metal part is weakened. Step 4: The two second hydraulic cylinders (33) are further extended and retracted synchronously to adjust the position of the support column (36) so that the two second suction cups (31) are located at the central axis of the automobile sheet metal. Then, the two output ends of the double-axis cylinder (29) push an extension rod (30) in opposite directions respectively, and the first hydraulic cylinder (26) contracts to pull the sliding block (27) upward. Then, the first steering gear (28) is started to rotate the double-axis cylinder (29) 180 degrees so that the two second suction cups (31) are downward. The hydraulic cylinder (26) extends the sliding block (27) and pushes downward, and the two second suction cups (31) contact the surface of the automobile sheet metal. The second vacuum pump (34) is started to extract the air between the second suction cups (31) and the automobile sheet metal. Then, the first hydraulic cylinder (26) contracts again to pull the sliding block (27) upward. The first steering gear (28) is turned on and reversed 180 degrees. The first hydraulic cylinder (26) extends the sliding block (27) and pushes downward, so that the four first suction cups (10) contact the other side of the automobile sheet metal. Step 5: Finally, the first vacuum pump (14) starts working again to extract the air between a suction cup (10) and the automobile sheet metal part. Then, the second vacuum pump (34) stops working, and the second suction cup (31) loses its adsorption force on the automobile sheet metal part. The two second hydraulic cylinders (33) extend synchronously to move the two extension rods (30) to the left, so that the two extension rods (30) leave the second connecting member (17) and the automobile sheet metal part. The driving motor (22) reverses, so that the middle connecting member (15) moves backward, driving the automobile sheet metal part to move to the right together. The 3D scanner (39) scans and detects the other side of the automobile sheet metal part.

Images