Welding spot polishing device used after welding of tower crane platform

Abstract

The invention discloses a welding spot polishing device after welding of tower crane platforms, which comprises a clamping and conveying mechanism, a front polishing mechanism, a rear polishing mechanism and an adjusting assembly, a plurality of groups of tower crane platforms arranged side by side are placed on the clamping and conveying mechanism, and the front polishing mechanism and the rear polishing mechanism are arranged above the clamping and conveying mechanism. A turn-over assembly is mounted on the clamping and conveying mechanism between the front polishing mechanism and the rear polishing mechanism; redundant welding spots on the tower crane platform are polished in an automatic polishing mode, meanwhile, the polishing efficiency is high, equipment is simple, and the manufacturing cost of parts of the tower crane platform is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tower crane parts processing equipment, in particular to a welding spot polishing device for a tower crane platform after welding. BACKGROUND

[0002] After the tower crane platform is welded, the flying solder spots on the outer wall and the inner wall of the tower crane platform need to be polished clean. The current polishing method is to polish by using a grinding machine manually. This method has a large labor intensity of the workers, and the workers need to polish every corner. The polishing efficiency of the tower crane platform is relatively low, the working environment of the workers is relatively poor, and the cost of processing a tower crane platform increases accordingly.

[0003] The current automatic polishing device installs a polishing wheel on a mechanical arm, and drives the polishing wheel to move to polish the excess welding spots. The mechanical arm needs to be purchased, and the moving route needs to be adjusted according to the size of the product to be polished. This method has a large cost, and the polishing efficiency is the same as that of the workers polishing the welding spots. Only the workers are replaced by the mechanical arm to polish the tower crane platform. SUMMARY

[0004] In view of the above problems of the prior art, the present application provides a welding spot polishing device for a tower crane platform after welding. The excess welding spots on the tower crane platform are polished by an automatic polishing method. The polishing efficiency is relatively high, the device is simple, and the manufacturing cost of the tower crane platform parts is reduced.

[0005] To achieve the above object, the present application provides a welding spot polishing device for a tower crane platform after welding. The device comprises a clamping and conveying mechanism, a front polishing mechanism, a rear polishing mechanism and an adjusting assembly. A plurality of tower crane platforms are arranged side by side on the clamping and conveying mechanism. The front polishing mechanism and the rear polishing mechanism are arranged above the clamping and conveying mechanism. A turnover assembly is installed on the clamping and conveying mechanism between the front polishing mechanism and the rear polishing mechanism. A plurality of polishing wheels driven by stepping motors are installed at the bottom of the front polishing mechanism and the rear polishing mechanism. An adjusting assembly and an adjusting assembly are arranged between the polishing wheels and the front polishing mechanism and the rear polishing mechanism. The positions of the polishing wheels on the front polishing mechanism and the rear polishing mechanism are adjusted by the adjusting assembly and the adjusting assembly. The front polishing mechanism comprises a first lifting plate, a first swing arm and a moving seat. A plurality of first swing arms are installed below the first lifting plate. Each group of first swing arms comprises two first swing arms. A plurality of moving seats are installed below the first lifting plate and are in sliding cooperation with the lifting plate. Each group of first swing arms is hinged to the moving seat. A plurality of sliding grooves are formed in the bottom of the first lifting plate. Two groups of mounting blocks are clamped in each sliding groove. The mounting blocks move in the sliding grooves. A polishing wheel capable of lifting is installed at the bottom of each mounting block. An adjusting assembly is arranged between the plurality of moving seats and the first lifting plate. The rear grinding mechanism includes a second lifting plate and a second swing arm. The grinding wheels on the rear grinding mechanism are divided into horizontal grinding wheels and vertical grinding wheels. There are two sets of horizontal grinding wheels, which are installed at the bottom of the second lifting plate and move up and down with the second lifting plate. A guide groove parallel to the horizontal grinding wheels is provided below the second lifting plate. A slide is inserted in the guide groove, and a vertical grinding wheel is installed below the slide. An adjustment component is provided between the slide and the second lifting plate. The vertical grinding wheels can be closed and opened by adjusting the adjustment component to adjust the distance between the two vertical grinding wheels.

[0006] Preferably, the adjustment component is an adjustment disc driven by a stepper motor. The disc is installed below the first lifting plate. Multiple arc-shaped grooves extending from the center to the outer periphery are opened on the adjustment disc. A sliding column is installed below the moving seat and extends into the arc-shaped groove of the adjustment disc. The position of the moving seat is adjusted by adjusting the adjustment disc.

[0007] Preferably, the two ends of the horizontal grinding wheel are installed at the bottom of the second lifting plate via lifting arms. The lifting arms pass through the second lifting plate, and a hydraulic cylinder is provided between the lifting arms and the second lifting plate. The horizontal grinding wheel is raised and lowered by the lifting arms. The adjustment component is an electric telescopic rod. A guide rail is installed on the second lifting plate, and a guide seat that moves on the guide rail is clamped on the guide rail. An electric telescopic rod is installed between the second lifting plate and the guide seat. The electric telescopic rod realizes the reciprocating movement of the guide seat. The guide seat is hinged to the two slides via connecting rods. When the guide seat reciprocates, the slides move closer to or further away.

[0008] Preferably, the clamping and conveying mechanism includes clamping rods, clamping fixtures, and a conveying chain. Two sets of sprockets are installed on the ground, and two conveying chains are meshed on the sprockets. Multiple clamping rods are installed on the conveying chains at equal intervals. Support rods are installed on the ground outside the conveying chains, supporting the two ends of the clamping rods. Two clamping fixtures are installed at both ends of each clamping rod, and the clamping fixtures on the two clamping rods clamp the four corners of the tower crane platform.

[0009] Preferably, the clamping fixture consists of angle irons and extrusion plates. Two sets of angle irons are installed at the top of each clamping rod. Each angle iron has a flared opening at its top, and an extrusion plate is installed inside each angle iron. A guide rod is installed on the back of the extrusion plate, and the guide rod slides through the angle iron. A spring is fitted on the guide rod to move it outward. A pulley is installed at the end of the guide rod away from the extrusion plate. Limiting rods are installed on both sides of the clamping rod. Limiting rods are also provided in the front and rear grinding mechanisms. The front end of the limiting rod is inclined, and the pulley contacts the inner wall of the limiting rod. The limiting rod presses the guide rod inward, thus pressing the extrusion plate against the tower crane platform.

[0010] Preferably, the flipping assembly includes clamping arms, a flipping seat, and a lifting seat. Lifting seats are installed on the ground on both sides of the clamping and conveying mechanism. Each lifting seat has a flipping seat installed on it. A stepper motor is installed between the flipping seat and the lifting seat, driving the flipping seat to rotate. Multiple telescopic clamping arms are installed on the flipping seat. Each clamping arm includes a mounting base, an upper clamping plate, a lower clamping plate, and a clamping rod. A telescopic assembly is provided between the flipping seat and the mounting base. The upper clamping plate is hinged to the mounting base, and the lower clamping plate is fixed to the mounting base. A limit block is installed on the mounting base. The limit block restricts the maximum swing angle of the upper clamping plate. A sliding clamping rod is installed on the mounting base between the two upper and lower clamping plates. A sliding sleeve is fitted on the clamping rod. A connecting rod is hinged between the sliding sleeve and the upper clamping plate. A clamping plate is installed at the end of the clamping rod facing the tower crane platform. A first spring is fitted on the clamping rod and is located between the sliding sleeve and the clamping plate. One end of the clamping rod passes through the mounting base and slides along the mounting base. A second spring is fitted on the clamping rod and is located between the sliding sleeve and the mounting base. The second spring pushes the sliding sleeve inward.

[0011] Compared with the prior art, the advantages of the present invention are: to grind the excess weld points on the tower crane platform by automatic grinding, while the grinding efficiency is relatively high, the equipment is simple, and the manufacturing cost of tower crane platform parts is reduced. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0013] Figure 2 This is a top view of the present invention.

[0014] Figure 3 This is the front view of the present invention.

[0015] Figure 4 This is a schematic diagram of the clamping and conveying mechanism of the present invention.

[0016] Figure 5 This is a schematic diagram of the top surface of the front grinding mechanism of the present invention.

[0017] Figure 6 This is a schematic diagram of the bottom of the front grinding mechanism of the present invention.

[0018] Figure 7 This is a schematic diagram of the single-sided flipping component of the present invention.

[0019] Figure 8 This is a schematic diagram of the top surface of the post-grinding mechanism of the present invention.

[0020] Figure 9 This is a schematic diagram of the bottom of the post-grinding mechanism of the present invention.

[0021] Figure 10This is a schematic diagram of the front of the tower crane platform.

[0022] Figure 11 This is a schematic diagram of the back of the tower crane platform.

[0023] The components include: 1. Clamping and conveying mechanism; 2. Clamping rod; 4. Conveyor chain; 5. Support rod; 6. Clamping fixture; 7. Angle iron; 8. Extrusion plate; 9. Guide rod; 10. Pulley; 11. Limiting rod; 12. Front grinding mechanism; 13. First lifting plate; 14. First swing arm; 15. Moving seat; 16. Sliding groove; 17. Mounting block; 18. Rear grinding mechanism; 19. Second lifting plate; 21. Horizontal grinding wheel; 22. Lifting arm; 23. Vertical grinding wheel; 24. Guide groove. 25. Slide, 26. Adjustment component, 27. Adjustment component, 28. Guide rail, 29. Guide seat, 30. Adjustment disc, 31. Arc groove, 32. Slide column, 33. Flipping component, 34. Clamping arm, 35. Flipping seat, 37. Mounting seat, 38. Telescopic component, 39. Upper clamping plate, 40. Lower clamping plate, 41. Clamping rod, 42. Sliding sleeve, 43. Clamping plate, 44. First spring, 45. Second spring, 46. Lifting seat, 47. Limiting block, 48. Grinding wheel. Detailed Implementation

[0024] The invention will now be further described with reference to the accompanying drawings.

[0025] like Figures 1-11As shown, a weld point grinding device for a tower crane platform after welding includes a clamping and conveying mechanism 1, a front grinding mechanism 12, a rear grinding mechanism 18, and an adjusting component 26. Multiple tower crane platforms are placed side-by-side on the clamping and conveying mechanism 1. The clamping and conveying mechanism 1 clamps and conveys the tower crane platforms to the right, sequentially transporting them to the front grinding mechanism 12 and the rear grinding mechanism 18. The front grinding mechanism 12 and the rear grinding mechanism 18 sequentially grind the weld points on the front and flipped sides of the tower crane platforms, thus removing splattered solder points. The front grinding mechanism 12 and the rear grinding mechanism 18 are positioned above the clamping and conveying mechanism 1. A flipping component 33 is installed on the clamping and conveying mechanism 1 between the front grinding mechanism 12 and the rear grinding mechanism 18. The flipping component 33 flips the tower crane platforms. The front grinding mechanism 12 grinds the weld points on the front and flipped sides of the tower crane platforms. After the front side of the tower crane platform is polished, the flipping mechanism flips the back side of the tower crane platform to face upwards. Then, the rear polishing mechanism 18 polishes the back side of the tower crane platform. The bottom of the front polishing mechanism 12 and the rear polishing mechanism 18 are equipped with multiple polishing wheels 48 driven by stepper motors. (When the frame of the tower crane platform is welded to the mesh plate, spattered weld points will be generated on the tower crane platform. The spattered weld points are around the weld points of the frame and the mesh plate. Therefore, when polishing, only the area around the weld points of the frame and the mesh plate needs to be polished.) An adjustment component 27 and an adjustment component 26 are set between the polishing wheels 48 and the front polishing mechanism 12 and the rear polishing mechanism 18. The position of the polishing wheels 48 on the front polishing mechanism 12 and the rear polishing mechanism 18 is adjusted by the adjustment component 27 and the adjustment component 26. The weld points of the tower crane platform are polished by adjusting the position of the polishing wheels 48. The front grinding mechanism 12 includes a first lifting plate 13, a first swing arm 14, and a movable seat 15. Multiple vertically arranged first columns are fixed to the ground (cement floor) at pre-embedded bolt positions. The first columns pass through the first lifting plate 13, and the first lifting plate 13 rises and falls along the first columns. A hydraulic cylinder is installed between the first columns and the first lifting plate 13 by bolt fastening, and the lifting and lowering of the first lifting plate 13 is achieved by the extension and retraction of the hydraulic cylinder. Below the first lifting plate 13, multiple sets of left-right opposing first swing arms 14 are installed, each set consisting of two arms, one in front and one behind. Below the first lifting plate 13, multiple sliding couplings are installed. The movable seat 15 (a horizontally arranged slide rail is fixed to the bottom of the first lifting plate 13 by bolts, and the movable seat 15 is locked on the slide rail for movement) is hinged to each set of first swing arms 14. Two left-right sliding grooves 16 are opened at the bottom of the first lifting plate 13. Two sets of mounting blocks 17 that move horizontally within each sliding groove 16 are engaged. The mounting blocks 17 move back and forth within the sliding grooves 16. A grinding wheel 48 capable of lifting and lowering is installed at the bottom of each mounting block 17 (the grinding wheel 48 is located at the bottom of the mounting block 17, and a vertically upward rotating shaft is installed on the grinding wheel 48, with a bearing sleeved on the rotating shaft). Block 17 has a through hole for the bearing to move up and down. When block 17 moves, it drives the grinding wheel 48 to move. It is fixed to the output shaft of the stepper motor above the rotating shaft by welding. The stepper motor drives the grinding wheel 48 to rotate. A collar is fixed to the housing of the stepper motor by welding. The collar is fitted onto the sleeve rod. The stepper motor moves along the sleeve rod. A hydraulic cylinder is fixed between the sleeve rod and the top of the first lifting plate 13 by bolts. The hydraulic cylinder realizes the lifting and lowering of the sleeve rod. The lifting and lowering of the sleeve rod drives the lifting and lowering of the grinding wheel 48. An adjustment component 27 is provided between the multiple movable seats 15 and the first lifting plate 13. Component 27 adjusts the position of the movable seat 15, thereby adjusting the position of the mounting block 17; during operation, when the right grinding wheel 48 is directly above the manhole, the right grinding wheel 48 first opens, then the grinding wheel 48 descends, and the grinding wheel 48 contacts the outer inner wall of the manhole. The clamping and conveying mechanism 1 conveys the tower crane platform to the right, and the right grinding wheel 48 grinds the outer edge of the manhole. After grinding the outer edge of the manhole, the grinding wheel 48 contacts the right outer wall of the manhole, the clamping and conveying mechanism 1 stops conveying, and the right grinding wheels 48 move closer together. In this way, the right grinding wheel 48 grinds the right outer wall of the manhole, and the clamping and conveying mechanism 1 conveys the tower crane platform to the right.When the tower crane platform moves directly below the first lifting plate 13, the first lifting plate 13 descends, and the two grinding wheels 48 on the right side descend to contact the inner edge of the frame. The right grinding wheel 48 contacts the top surface of the mesh plate. A manhole is located on the left side of the tower crane platform, meaning no grinding is required at the manhole, and the left grinding wheel 48 does not need to descend. When the left grinding wheel 48 passes the manhole, it descends to grind the inner wall of the left side of the tower crane platform and the mesh plate. After grinding is completed on both the left and right sides of the tower crane platform, the clamping and conveying mechanism 1 transports the tower crane platform to the right. Simultaneously, the right grinding wheel 48 rises to make way for the transport of the tower crane platform, allowing the left grinding wheel 48 to grind the front and rear inner walls of the tower crane platform. Welding is then completed. The corners of the tower crane platform and areas that cannot be ground due to gaps between the grinding wheels 48 (a small number of areas) can be ground by subsequent quality inspectors.

[0026] The rear grinding mechanism 18 includes a second lifting plate 19 and a second swing arm. The connection method between the second lifting plate 19 and the ground is the same as that of the first lifting plate 13. The grinding wheels 48 on the rear grinding mechanism 18 are divided into horizontal grinding wheels 21 and vertical grinding wheels 23. There are two sets of horizontal grinding wheels 21, which are arranged longitudinally side by side. The horizontal grinding wheels 21 are installed at the bottom of the second lifting plate 19 and move up and down with the second lifting plate 19. When it is necessary to grind the back of the tower crane platform, the horizontal grinding wheels 21 descend. A guide groove 24 parallel to the horizontal grinding wheels 21 is opened below the second lifting plate 19. The guide groove 24 is located on the right side of the horizontal grinding wheels 21 and is locked inside the guide groove 24. A slide block 25 slides within two guide slots 24. A vertical grinding wheel 23 is installed below the slide block 25. The vertical grinding wheel 23 can also be raised and lowered on the slide block 25 (the installation method of the slide block 25 and the vertical grinding wheel 23 is the same as that of the grinding wheel 48 and the mounting block 17; the raising and lowering method of the vertical grinding wheel 23 of the rear grinding mechanism 18 is the same as that of the grinding wheel 48 on the front grinding mechanism 12). When grinding is not required, the vertical grinding wheel 23 rises. An adjustment component 26 is provided between the slide block 25 and the second lifting plate 19. The vertical grinding wheel 23 is closed and opened by adjusting the adjustment component 26, thus adjusting the distance between the two vertical grinding wheels 23. This ensures the tower crane is level. The longitudinal frame at the bottom of the platform is ground on both sides. During grinding, when the right side of the tower crane platform is directly below the vertical grinding wheel 23, the horizontal grinding wheel 21 descends to grind the back of the rectangular frame of the tower crane platform. At the same time, the vertical grinding wheel 23 descends to contact the outer wall of the transverse frame for grinding. The clamping and conveying mechanism 1 transports the tower crane platform to the right, thus the horizontal grinding wheel performs moving grinding on the tower crane platform. When the longitudinal frame on the back of the tower crane platform moves to the point where the vertical grinding wheel 23 descends, the edge of the vertical grinding wheel 23 contacts the side of the longitudinal frame, and the bottom of the vertical grinding wheel 23 contacts the fixed bottom of the longitudinal frame. The clamping and conveying mechanism 1 stops moving, and the adjustment group... Part 26 opens the vertical grinding wheel 23, allowing it to grind the right side of the longitudinal frame. As the vertical grinding wheel 23 makes way for the longitudinal frame, the clamping and conveying mechanism 1 transports the tower crane platform to the right. When the left edge of the longitudinal frame is flush with the vertical grinding wheel 23, the adjusting component 26 closes the vertical grinding wheel 23, allowing it to grind the outer left wall of the tower crane platform. When the vertical grinding wheel 23 approaches the outer wall of the transverse frame, the adjusting component 26 stops working, and the clamping and conveying mechanism 1 transports the tower crane platform to the right, thus completing the grinding of the back of the tower crane platform. Similarly, corners that the grinding wheel 48 cannot reach are observed and ground by quality inspectors.

[0027] The adjustment component 27 is an adjustment disc 30 driven by a stepper motor. The stepper motor is fixed to the first lifting plate 13 by bolts. The output shaft of the stepper motor passes through the first lifting plate 13 and is fixed to the top of the adjustment disc 30 by welding. The adjustment disc 30 is rotated by the stepper motor and is installed below the first lifting plate 13. Two arc-shaped grooves 31 extending from the center to the outer periphery are opened on the adjustment disc 30. A sliding column 32 is installed below the moving seat 15 by welding. The sliding column 32 extends into the arc-shaped grooves 31 of the adjustment disc 30. The position of the moving seat 15 is adjusted by adjusting the adjustment disc 30. When working, the adjustment disc 30 is rotated, and the sliding column 32 moves along the arc-shaped grooves 31. The moving seat 15 slides with the first lifting plate 13, so the moving seat 15 moves left and right along the first lifting plate 13. This adjusts the position of the moving seat 15 and thus adjusts the position between the two grinding wheels 48 on the same side of the first lifting plate 13.

[0028] The two ends of the horizontal grinding wheel 21 are mounted on the bottom of the second lifting plate 19 via lifting arms 22. The two sides of the horizontal grinding wheel 21 are mounted on the lifting arms 22 via bearings. A stepper motor is bolted to the lifting arms 22, and the output shaft of the stepper motor is welded to one end of the horizontal grinding wheel 21. The stepper motor drives the rotation of the horizontal grinding wheel 21. The lifting arms 22 pass through the second lifting plate 19 and move up and down along the second lifting plate 19. A hydraulic cylinder is bolted between the lifting arms 22 and the second lifting plate 19. The extension and retraction of the hydraulic cylinder achieves the raising and lowering of the horizontal grinding wheel 21. The raising and lowering of the horizontal grinding wheel 21 is achieved by the raising and lowering of the lifting arms 22. Adjustment component 2 6. A transverse guide rail 28 is installed on the second lifting plate 19 by bolts via an electric telescopic rod. A guide seat 29 that moves left and right on the guide rail 28 is mounted on the guide rail 28. An electric telescopic rod is installed between the second lifting plate 19 and the guide seat 29 by bolts. The outer wall of the electric telescopic rod is fixed to the second lifting plate 19 by bolts. The rod end of the electric telescopic rod is fixed to the guide seat 29 by bolts. The electric telescopic rod realizes the reciprocating movement of the guide seat 29. The guide seat 29 is hinged to the two slides 25 by a connecting rod. When the guide seat 29 moves back and forth, the slides 25 move closer or further away, thus adjusting the distance between the two vertical grinding wheels 23 on the second lifting plate 19.

[0029] The clamping and conveying mechanism 1 includes clamping rods 2, clamping fixtures 6, and conveying chains 4. Two sets of left-right opposing sprockets are installed on the ground via bearings and bearing seats. Two conveying chains 4 are meshed on the sprockets. Multiple clamping rods 2 are installed on the conveying chains 4 by welding. A transverse support rod 5 is installed on the ground outside the conveying chains 4. A support plate is fixed to the ground by bolts through the support rod 5. The support rod 5 supports both ends of the clamping rods 2. Two clamping fixtures 6 are installed on both ends of each clamping rod 2 by welding. The four clamping fixtures 6 on the two clamping rods 2 clamp the four corners of the tower crane platform.

[0030] The clamping fixture 6 consists of angle irons 7 and extrusion plates 8. Two sets of angle irons 7 with inward-facing openings are installed at the top of each clamping rod 2. Each angle iron 7 has a flared opening at its top to facilitate placing the tower crane platform into the clamping fixture 6. An extrusion plate 8 is installed inside each angle iron 7. The two extrusion plates 8 on the same clamping rod 2 are located on the front and rear sides of the tower crane platform, clamping the front and rear sides of the platform. The left and right sides of the tower crane platform are clamped by the angle irons 7. Guide rods 9 are welded to the back of the extrusion plates 8. The guide rods 9 slide through the angle irons 7, and springs are fitted onto the guide rods 9 to move them outwards. One end of the spring is welded to the guide rod 9, and the other end of the spring abuts against the outer wall of the angle iron 7. A pulley 10 is installed on the end of the guide rod 9 away from the extrusion plate 8 by bolt fastening. Limiting rods 11 are installed on the front and rear sides of the clamping rod 2. The limiting rods 11 are fixed to the support plate by welding. The pulley 10 abuts against the limiting rod 11. The extrusion plate 8 is pressed inward by the limiting rod 11. Limiting rods 11 are provided in both the front grinding mechanism 12 and the rear grinding mechanism 18. The front end of the limiting rod 11 is a bevel. The pulley 10 contacts the inner wall of the limiting rod 11. The guide rod 9 is pressed inward by the limiting rod 11. In this way, the extrusion plate 8 presses the tower crane platform.

[0031] The flipping assembly 33 includes a clamping arm 34, a flipping seat 35, and a lifting seat 46. Lifting seats 46 are installed on the ground on both sides of the clamping and conveying mechanism 1. (Vertical lifting columns are fixed to the ground by bolts, the lifting columns pass through the lifting seats 46, and the lifting seats 46 rise and fall on the lifting columns. A hydraulic cylinder is installed between the ground and the bottom of the lifting seats 46 by bolts, and the hydraulic cylinders control the rise and fall of the lifting seats 46.) Each lifting seat 46 has a flipping seat 35 installed on it via bearings and bearing seats. The flipping seat 35 is a disc. A driven gear is fixed to the side of the flipping seat 35 by welding. A stepper motor is installed between the flipping seat 35 and the lifting seat 46, and the stepper motor is bolted to the lifting seat 46. A drive gear, meshing with the driven gear, is welded onto the output shaft. A stepper motor drives the tilting base 35 to rotate 180°. Multiple telescopic clamping arms 34 are mounted on the tilting base 35 (a straight rod is welded to the back of each clamping arm 34, sliding through the tilting base 35; a hydraulic cylinder is bolted to the back of each clamping arm 34 and the tilting base 35, allowing the clamping arms 34 to extend and retract). Each clamping arm 34 includes a mounting base 37, an upper clamping plate 39, a lower clamping plate 40, and a clamping rod 41. The straight rod is welded to the back of the mounting base 37, the upper clamping plate 39 is hinged to the front of the mounting base 37, and the lower clamping plate 40 is welded to the mounting base 37. The lower clamping plate 40 supports... The bottom of the tower crane platform is secured by an upper clamping plate 39, which clamps the top of the platform. A limit block 47 is welded to the front of the mounting base 37 (the limit block 47 abuts against the top of the upper clamping plate 39, which limits the outward swing angle of the upper clamping plate 39). The limit block 47 restricts the maximum swing angle of the upper clamping plate 39. A sliding clamping rod 41 is mounted on the mounting base 37 between the two upper and lower clamping plates 40. The clamping rod 41 slides through the mounting base 37. A sliding sleeve 42 is fitted onto the clamping rod 41. A connecting rod is hinged between the sliding sleeve 42 and the upper clamping plate 39. A clamping plate 43 is welded to the end of the clamping rod 41 facing the tower crane platform. The end of the clamping plate 43 facing the tower crane platform is covered with a friction rubber layer. A second clamping plate 43 is fitted onto the clamping rod 41. A first spring 44 is located between the sliding sleeve 42 and the clamping plate 43. When the tower crane platform is not clamped, the first spring moves the clamping plate 43 inward. One end of the clamping rod 41 passes through the mounting base 37 and slides along the mounting base 37. A second spring 45 is sleeved on the clamping rod 41, located between the sliding sleeve 42 and the mounting base 37. The second spring 45 pushes the sliding sleeve 42 inward, thus opening the upper clamping plate 39. When the mounting base 37 moves inward, the clamping plate 43 clamps the tower crane platform, compressing the first spring 44 and the second spring 45. When the first spring 44 and the second spring 45 are fully compressed, the upper clamping plate 39 clamps the top of the tower crane platform, and the lifting seat 46 rises simultaneously.The tilting seat 35 rotates 180°, the lifting seat 46 descends, the mounting seat 37 moves outward, the upper clamping plate 39 loosens, and the tower crane platform descends into the clamping fixture 6, thus completing the tilting of the tower crane platform.

[0032] In this application, multiple stepper motors and multiple hydraulic cylinders are independent. The stepper motors are connected to the PLC through stepper motor drivers, and the hydraulic cylinders are connected to the PLC through servo valves. The working sequence and working time of multiple stepper motors and multiple hydraulic cylinders are controlled by the PLC controller to achieve the grinding of weld points.

Claims

1. A welding point grinding device for tower crane platforms after welding, comprising a clamping and conveying mechanism, a front grinding mechanism, a rear grinding mechanism, and an adjustment assembly, wherein multiple sets of tower crane platforms arranged side by side are placed on the clamping and conveying mechanism, characterized in that... A front grinding mechanism and a rear grinding mechanism are provided above the clamping and conveying mechanism. A flipping component is installed on the clamping and conveying mechanism between the front grinding mechanism and the rear grinding mechanism. Multiple grinding wheels driven by stepper motors are installed at the bottom of the front grinding mechanism and the rear grinding mechanism. An adjustment component and an adjustment assembly are provided between the grinding wheels and the front grinding mechanism and the rear grinding mechanism. The position of the grinding wheels on the front grinding mechanism and the rear grinding mechanism is adjusted by the adjustment component and the adjustment assembly. The front grinding mechanism includes a first lifting plate, a first swing arm, and a movable seat. Multiple sets of first swing arms are installed below the first lifting plate, with two arms in each set. Multiple movable seats that slide with the lifting plate are installed below the first lifting plate. Each set of first swing arms is hinged to the movable seat. Multiple sliding grooves are opened at the bottom of the first lifting plate. Two sets of mounting blocks are inserted into each sliding groove and move within the sliding groove. A grinding wheel that can be raised and lowered is installed at the bottom of each mounting block. An adjustment component is provided between the multiple movable seats and the first lifting plate. The rear grinding mechanism includes a second lifting plate and a second swing arm. The grinding wheels on the rear grinding mechanism are divided into horizontal grinding wheels and vertical grinding wheels. There are two sets of horizontal grinding wheels, which are installed at the bottom of the second lifting plate and move up and down with the second lifting plate. A guide groove parallel to the horizontal grinding wheels is provided below the second lifting plate. A slide is inserted in the guide groove, and a vertical grinding wheel is installed below the slide. An adjustment component is provided between the slide and the second lifting plate. The vertical grinding wheels can be closed and opened by adjusting the adjustment component to adjust the distance between the two vertical grinding wheels.

2. The weld grinding device for a tower crane platform after welding is completed, as described in claim 1, is characterized in that... The adjustment component is an adjustment disc driven by a stepper motor. The disc is installed below the first lifting plate. Multiple arc-shaped grooves extending from the center to the outer periphery are opened on the adjustment disc. A sliding column is installed below the moving seat and extends into the arc-shaped groove of the adjustment disc. The position of the moving seat is adjusted by adjusting the adjustment disc.

3. The weld grinding device for a tower crane platform after welding is completed, as described in claim 2, is characterized in that... The two ends of the horizontal grinding wheel are installed at the bottom of the second lifting plate via lifting arms. The lifting arms pass through the second lifting plate, and a hydraulic cylinder is installed between the lifting arms and the second lifting plate. The horizontal grinding wheel is raised and lowered by the lifting arms. The adjustment component is an electric telescopic rod. A guide rail is installed on the second lifting plate, and a guide seat that moves on the guide rail is clamped on the guide rail. An electric telescopic rod is installed between the second lifting plate and the guide seat. The electric telescopic rod realizes the reciprocating movement of the guide seat. The guide seat is hinged to the two slides via connecting rods. When the guide seat reciprocates, the slides move closer or further away.

4. The weld grinding device for a tower crane platform after welding is completed, as described in claim 3, is characterized in that... The clamping and conveying mechanism includes clamping rods, clamping fixtures, and conveying chains. Two sets of sprockets are installed on the ground, and two conveying chains mesh on the sprockets. Multiple clamping rods are installed on the conveying chains at equal intervals. Support rods are installed on the ground outside the conveying chains, supporting the two ends of the clamping rods. Two clamping fixtures are installed at both ends of each clamping rod, and the clamping fixtures on the two clamping rods clamp the four corners of the tower crane platform.

5. The weld grinding device for a tower crane platform after welding is completed, as described in claim 4, is characterized in that... The clamping fixture consists of angle irons and extrusion plates. Two sets of angle irons are installed at the top of each clamping rod. Each angle iron has a flared opening at its top, and an extrusion plate is installed inside each angle iron. A guide rod is installed on the back of the extrusion plate, and the guide rod slides through the angle iron. A spring is fitted on the guide rod to move it outward. A pulley is installed at the end of the guide rod away from the extrusion plate. Limiting rods are installed on both sides of the clamping rod. Limiting rods are also installed in the front and rear grinding mechanisms. The front end of the limiting rod is inclined, and the pulley contacts the inner wall of the limiting rod. The limiting rod presses the guide rod inward, thus pressing the extrusion plate against the tower crane platform.

6. The weld grinding device for a tower crane platform after welding is completed, as described in claim 5, is characterized in that... The flipping assembly includes clamping arms, a flipping base, and a lifting base. Lifting bases are installed on the ground on both sides of the clamping and conveying mechanism. Each lifting base has a flipping base mounted on it. A stepper motor is installed between the flipping base and the lifting base, driving the flipping base to rotate. Multiple telescopic clamping arms are installed on the flipping base. Each clamping arm includes a mounting base, an upper clamping plate, a lower clamping plate, and a clamping rod. A telescopic assembly is provided between the flipping base and the mounting base. The upper clamping plate is hinged to the mounting base, and the lower clamping plate is fixed to the mounting base. A limit block is installed on the mounting base to limit movement. The maximum swing angle of the upper clamping plate is limited by a block. A sliding clamping rod is installed on the mounting base between the two upper and lower clamping plates. A sliding sleeve is fitted on the clamping rod. A connecting rod is hinged between the sliding sleeve and the upper clamping plate. A clamping plate is installed at the end of the clamping rod facing the tower crane platform. A first spring is fitted on the clamping rod and is located between the sliding sleeve and the clamping plate. One end of the clamping rod passes through the mounting base and slides along the mounting base. A second spring is fitted on the clamping rod and is located between the sliding sleeve and the mounting base. The second spring pushes the sliding sleeve inward.

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