Outer circle grinding machine for girth welding machining and using method of outer circle grinding machine

Abstract

The invention discloses an outer circle grinding machine for girth welding machining and a using method of the outer circle grinding machine, and relates to the technical field of grinding machines. A base is arranged in the protective cover, and a lifting assembly for driving the grinding assembly to move up and down is arranged on the base; the lifting assembly comprises a stand column which is horizontally and vertically arranged and a cross beam which moves up and down along the stand column and is horizontally and transversely arranged; the grinding assembly comprises a transverse moving seat arranged on the cross beam in a sliding mode, through the linkage design of a V-shaped connecting rod and a second air cylinder and in combination with elastic compensation of a supporting spring, dynamic self-adaptive attachment of a grinding wheel to the outer circle of a workpiece is achieved, the grinding wheel can automatically adapt to the 0.1-0.5 mm deformation error of the surface of the workpiece, grinding uniformity is ensured, and the grinding efficiency is improved. Therefore, the precision and the smoothness of the arc surface are ensured, the product quality is improved, the reworking operation is reduced, and the production efficiency of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of grinders, and in particular to an external cylindrical grinder for girth welding processing and a use method thereof. Background Art

[0002] Cylindrical grinding machine is a kind of mechanical equipment used for grinding, polishing or finishing the outer surface of cylindrical workpieces. It is widely used in metal processing, machinery manufacturing, automobile parts production and other fields. Its core function is to remove surface material or improve the finish through the relative movement of tools such as grinding wheels, abrasive belts or polishing wheels and the workpiece.

[0003] When most of the current cylindrical grinders are grinding some large tanks, due to the large grinding stroke and circular grinding track, the grinding wheel often fails to accurately fit the surface of the tank during the grinding process. The traditional solution is to inspect the tube body after grinding is completed, and rework the area of ​​the tube body that has not been processed to the standard. This operation is time-consuming and labor-intensive, greatly reducing the production efficiency of the device, and also increasing the operating burden of the staff. Summary of the invention

[0004] The object of the present invention is to provide an external cylindrical grinder for circumferential seam welding processing and a method of using the same, so as to solve the technical problems mentioned in the above background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An external cylindrical grinding machine for girth welding processing includes a protective cover;

[0007] A base is provided in the protective cover, and a lifting assembly is provided on the base for driving the grinding assembly to move up and down;

[0008] The lifting assembly includes a horizontally and vertically arranged column and a horizontally and laterally arranged beam that moves up and down along the column;

[0009] The grinding assembly includes a transverse seat slidably arranged on the crossbeam, and the transverse seat is symmetrically distributed at both ends of the crossbeam, a fixed frame is arranged on one side of the transverse seat, a deflection plate is movably arranged on the upper end surface of the fixed frame, a V-shaped connecting rod is arranged on the lower end surface of the deflection plate, a snap-on wheel and a grinding wheel are rotatably arranged on the top and bottom ends of the V-shaped connecting rod, a supporting spring for supporting one end of the deflection plate is arranged on one end of the fixed frame close to the V-shaped connecting rod, a No. 2 cylinder is arranged on one end of the fixed frame away from the supporting spring, and a fine-tuning connecting rod for driving the other end of the deflection plate to rise and fall is movably arranged on the telescopic end of the No. 2 cylinder.

[0010] As a further solution of the present invention: the upper end surface of the base is symmetrically provided with horizontally and vertically distributed loading guide rails, the loading guide rails are slidably sleeved with loading racks, and the loading racks are symmetrically distributed at both ends of the loading guide rails, a screw rod is sleeved at the bottom center of the loading rack, one end of the screw rod is provided with a No. 1 bevel tooth, the base is provided with a No. 1 power source for driving the screw rod to rotate, and the output end of the No. 1 power source is provided with a No. 2 bevel tooth meshing with the No. 1 bevel tooth.

[0011] As a further solution of the present invention: the rotating frame on the carrier is provided with a limiting roller for carrying the tank workpiece, the upper end surface of the base is symmetrically provided with horizontal and vertically distributed end bars, and the end bars are located between the carriers, and the end bars are provided with a positioning piece for limiting one end of the tank workpiece.

[0012] As a further solution of the present invention: a No. 2 power source is arranged on the upper end surface of the base, a No. 1 sprocket is arranged on the output end of the No. 2 power source and one end of a set of limiting rollers, and a No. 1 chain is meshed on the outer side of the No. 1 sprocket.

[0013] As a further solution of the present invention: lifting guide rails are symmetrically arranged on both sides of the column, a counterweight guide rail is symmetrically arranged on the rear end surface of the column, a reserved groove is opened on the top of the column, a lifting seat connected to the cross beam is slidably arranged on the front end surface of the column, and a limiting wheel for engaging with the lifting guide rail is rotatably arranged on the lifting seat.

[0014] As a further solution of the present invention: a counterweight box is provided on the sliding sleeve of the counterweight guide rail, the counterweight box is connected to the lifting seat by a No. 2 chain, and the No. 2 chain runs through the reserved groove, and a No. 2 sprocket engaged with the No. 2 chain is rotatably arranged inside the reserved groove, a No. 3 power source for driving the No. 2 sprocket is provided on one side of the top end of the column, and guide sprockets for guiding the No. 2 chain are symmetrically arranged on the front and rear end surfaces of the column, and the guide sprocket and the No. 2 chain are engaged with each other.

[0015] As a further solution of the present invention: auxiliary guide rails are symmetrically arranged on both sides of the column, a travel seat is slidably arranged on the auxiliary guide rail, and the travel seat is connected to the lifting seat, a clamping wheel for engaging the auxiliary guide rail is rotatably arranged on the travel seat, a No. 1 travel chain connected to the bottom end of the column is arranged on the travel seat, a No. 2 travel chain is arranged at the bottom end of the No. 1 travel chain, and one end of the No. 2 travel chain is connected to the middle part of the No. 1 travel chain.

[0016] As a further solution of the present invention: transverse guide rails are symmetrically arranged on the upper and lower end surfaces of the cross beam, a rack is arranged on the front end surface of the cross beam, a transverse wheel for engaging with the transverse guide rail is rotatably arranged on the rear end surface of the transverse seat, a chain frame is arranged on the upper end surface of the cross beam, a No. 3 travel chain is movably arranged on the chain frame, one end of the No. 3 travel chain is connected to the transverse seat, a No. 4 power source is arranged on the transverse seat, a gear plate connected to the output end of the No. 4 power source is rotatably arranged on the rear end surface of the transverse seat, and the gear plate and the rack are meshed with each other.

[0017] As a further solution of the present invention: a mounting seat for supporting the middle part of the deflection plate is arranged on the upper end surface of the fixed frame, a No. 1 cylinder for controlling the movement of the card wheel is arranged on the top of the V-shaped connecting rod, a No. 5 power source is arranged on the deflection plate, and a synchronous wheel is arranged on the output end of the No. 5 power source and one end of the grinding wheel, a transmission belt is sleeved on the outer side of the synchronous wheel, and a tensioning roller for supporting the transmission belt is arranged on one side of the V-shaped connecting rod.

[0018] A method for using an external cylindrical grinder for girth welding processing comprises the following steps:

[0019] Step 1: First, clean and inspect the tank workpiece to be polished;

[0020] Step 2: Open the protective cover, start the No. 1 power source according to the size of the tank workpiece, and use the No. 1 power source to drive the screw to rotate so as to adjust the distance between the two sets of limit rollers, and use the two sets of limit rollers to support the tank workpiece;

[0021] Step 3: Adjust the position of the positioning piece, and use the positioning piece to limit one end of the tank workpiece;

[0022] Step 4: Start the No. 4 power source to drive the two sets of grinding components to move to the annular seam of the tank workpiece that needs to be polished, and then start the No. 3 power source to control the grinding components set on the crossbeam to descend to the corresponding working point;

[0023] Step 5: Start the No. 2 cylinder to adjust one end of the deflection plate, thereby controlling the angle of the other end so that the snap-on wheel and the grinding wheel can form a certain angle to fit the tank workpiece.

[0024] Step 6, start power source No. 2 and power source No. 5. Power source No. 2 drives a corresponding set of limit rollers to rotate, thereby driving the tank workpiece to rotate. Power source No. 5 drives the grinding wheel to rotate to grind the annular seam on the tank workpiece.

[0025] Beneficial effects of the present invention:

[0026] 1. In the present invention, through the linkage design of the V-shaped connecting rod and the No. 2 cylinder, combined with the elastic compensation of the supporting spring, the dynamic adaptive fitting of the grinding wheel to the outer circle of the workpiece is realized, which can automatically adapt to the deformation error of 0.1-0.5mm on the surface of the workpiece, ensure the uniformity of grinding, thereby ensuring the accuracy and smoothness of the arc surface, improving the quality of the product, reducing rework operations, and improving the production efficiency of the device.

[0027] 2. In the present invention, the bidirectional symmetrical adjustment of the transverse seat and the rack meshing structure make the grinding wheel feed accuracy reach ±0.02mm, and it can move accurately according to a predetermined trajectory, reducing the wear and damage of the grinding tool, thereby extending the service life of the tool and avoiding the workpiece deflection caused by unilateral force.

[0028] 3. In the present invention, multiple groups of power sources are independently controlled to realize the coordinated operation of tank workpiece rotation, grinding wheel lifting, lateral feeding and grinding action, and the overall efficiency is improved by more than 40%. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1 It is a three-dimensional schematic diagram of the whole device of the present invention;

[0031] Figure 2 It is a three-dimensional schematic diagram of the second bevel gear in the present invention;

[0032] Figure 3 It is a three-dimensional schematic diagram of the second chain in the present invention;

[0033] Figure 4 It is a three-dimensional schematic diagram of the No. 1 stroke chain in the present invention;

[0034] Figure 5 It is a three-dimensional schematic diagram of the grinding component in the present invention.

[0035] In the figure: 1, base; 2, loading rail; 3, loading rack; 4, lead screw; 5, No. 1 bevel gear; 6, No. 1 power source; 7, No. 2 bevel gear; 8, tank workpiece; 9, limit roller; 10, end bar; 11, positioning piece; 12, No. 2 power source; 13, No. 1 sprocket; 14, No. 1 chain; 15, column; 16, lifting rail; 17, counterweight rail; 18, reserved groove; 19, lifting seat; 20, limit wheel; 21, counterweight box; 22, No. 2 chain; 23, No. 2 sprocket; 24, No. 3 power source; 25, guide sprocket; 26, auxiliary rail; 27 , travel seat; 28, clamping wheel; 29, travel chain No. 1; 30, travel chain No. 2; 31, crossbeam; 32, transverse guide rail; 33, rack; 34, transverse seat; 35, transverse wheel; 36, chain frame; 37, travel chain No. 3; 38, power source No. 4; 39, fixed frame; 40, mounting seat; 41, deflection plate; 42, V-shaped connecting rod; 43, cylinder No. 1; 44, snap wheel; 45, grinding wheel; 46, power source No. 5; 47, synchronous wheel; 48, transmission belt; 49, tensioning roller; 50, support spring; 51, cylinder No. 2; 52, fine-tuning connecting rod. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-5 As shown, the present invention is an external cylindrical grinding machine for girth welding processing, comprising a protective cover;

[0038] A base 1 is provided in the protective cover, and a horizontally and vertically distributed loading guide rail 2 is symmetrically provided on the upper end surface of the base 1, and a loading rack 3 is slidably sleeved on the loading guide rail 2, and the loading rack 3 is symmetrically distributed at both ends of the loading guide rail 2, and a screw rod 4 is sleeved at the bottom center of the loading rack 3, and a first bevel gear 5 is provided at one end of the screw rod 4, and a first power source 6 for driving the screw rod 4 to rotate is provided on the base 1, and a second gear meshing with the first bevel gear 5 is provided at the output end of the first power source 6 The carrier 3 is provided with a limit roller 9 for carrying the tank workpiece 8, and the upper end surface of the base 1 is symmetrically provided with horizontal and vertically distributed end bars 10, and the end bars 10 are located between the carriers 3. The end bars 10 are provided with a positioning piece 11 for limiting one end of the tank workpiece 8. The upper end surface of the base 1 is provided with a second power source 12, and the output end of the second power source 12 and one end of a group of limit rollers 9 are both provided with a first sprocket 13, and the first A No. 1 chain 14 is meshed on the outer side of the sprocket 13. When the device is in use, the No. 1 power source 6 is started according to the size of the tank workpiece 8, and the No. 2 bevel gear 7 is driven to rotate by the No. 1 power source 6. The meshing transmission structure formed by the No. 2 bevel gear 7 and the No. 1 bevel gear 5 can drive the screw rod 4 to rotate to realize the synchronous two-way movement of the material carrier 3, and realize the adjustment of the spacing between the two sets of limit rollers 9. The two sets of limit rollers 9 are used to support the tank workpiece 8. The end bar 10 is provided with a threaded hole for installing a positioning member 11. The staff can adjust the position of the positioning member 11, and limit one end of the tank workpiece 8 by the positioning member 11. The No. 2 power source 12 drives the limit roller 9 to rotate through the No. 1 sprocket 13 and the No. 1 chain 14, driving the workpiece to rotate at a uniform speed. The screw rod 4 of the material carrier 3 is designed to mesh with the bevel gear 5 / 7, supports two-way synchronous movement, and can complete the rapid adaptation of workpieces with a diameter of 800-2000mm within 30 seconds.

[0039] The base 1 is provided with a lifting assembly for driving the grinding assembly to move up and down. The lifting assembly includes a horizontally and vertically arranged column 15 and a horizontally arranged crossbeam 31 that moves up and down along the column 15. Lifting guide rails 16 are symmetrically arranged on both sides of the column 15. A counterweight guide rail 17 is symmetrically arranged on the rear end surface of the column 15. A reserved groove 18 is provided on the top of the column 15. A lifting seat 19 connected to the crossbeam 31 is slidably provided on the front end surface of the column 15. A limiting wheel 20 for engaging with the lifting guide rail 16 is rotatably provided on the lifting seat 19. A counterweight box 21 is slidably sleeved on the counterweight guide rail 17. The counterweight box 21 and the lifting seat 19 are connected by a The second chain 22 is connected, and the second chain 22 passes through the reserved groove 18. The reserved groove 18 is internally rotatably provided with a second sprocket 23 meshing with the second chain 22. A third power source 24 for driving the second sprocket 23 is provided on one side of the top of the column 15. The front and rear end surfaces of the column 15 are symmetrically provided with guide sprockets 25 for guiding the second chain 22, and the guide sprocket 25 and the second chain 22 are meshed with each other. Auxiliary guide rails 26 are symmetrically provided on both sides of the column 15. A travel seat 27 is slidably provided on the auxiliary guide rail 26, and the travel seat 27 is connected to the lifting seat 19. A third power source 24 for driving the second sprocket 23 is provided on the top side of the column 15. A guide sprocket 25 for guiding the second chain 22 is symmetrically provided on the front and rear end surfaces of the column 15, and the guide sprocket 25 is meshed with the second chain 22. Auxiliary guide rails 26 are symmetrically provided on both sides of the column 15. A travel seat 27 is slidably provided on the auxiliary guide rail 26, and the travel seat 27 is connected to the lifting seat 19. A travel seat 27 is rotatably provided with a travel seat 27 for engaging the auxiliary guide rail 2 6, a No. 1 travel chain 29 connected to the bottom end of the column 15 is arranged on the travel seat 27, a No. 2 travel chain 30 is arranged at the bottom end of the No. 1 travel chain 29, and one end of the No. 2 travel chain 30 is connected to the middle part of the No. 1 travel chain 29. When the height of the grinding assembly needs to be adjusted, the No. 3 power source 24 drives the No. 2 sprocket 23 to rotate, and the No. 2 sprocket 23 moves up and down on the cross beam 31 through the No. 2 chain 22. Lifting guide rails 16 and counterweight guide rails 17 are arranged on both sides of the column 15. The lifting seat 19 slides along the lifting guide rails through the limiting wheel 20 and is connected to the cross beam 31. The counterweight box 21 is connected to the lifting seat through the No. 2 chain 22 19 linkage, the No. 3 power source 24 drives the No. 2 sprocket 23, combined with the guide sprocket 25 to achieve dynamic balance of the lifting movement, while further reducing the torque required when the No. 3 power source 24 is used, it can also offset the inertial impact of the crossbeam 31, so that the vibration amplitude of the lifting process is reduced by 70%, avoiding surface scratches caused by grinding vibration, the travel seat 27 on the auxiliary guide rail 26 is connected to the lifting seat 19, and the travel seat 27 is connected to the column 15 through the No. 1 travel chain 29 and the No. 2 travel chain 30, and the maximum height and minimum height of the lifting seat 19 are limited by the No. 1 travel chain 29 and the No. 2 travel chain 30 to avoid slippage or collision caused by excessive movement;

[0040] The grinding assembly includes a transverse seat 34 slidably arranged on the crossbeam 31, and the transverse seat 34 is symmetrically distributed at both ends of the crossbeam 31, a fixed frame 39 is arranged on one side of the transverse seat 34, a deflection plate 41 is movably arranged on the upper end surface of the fixed frame 39, a V-shaped connecting rod 42 is arranged on the lower end surface of the deflection plate 41, a card-sticking wheel 44 and a grinding wheel 45 are rotatably arranged on the top and bottom ends of the V-shaped connecting rod 42, respectively, a support spring 50 for supporting one end of the deflection plate 41 is arranged on one end of the fixed frame 39 close to the V-shaped connecting rod 42, a No. 2 cylinder 51 is arranged on one end of the fixed frame 39 away from the support spring 50, a fine-tuning connecting rod 52 for driving the other end of the deflection plate 41 to rise and fall is movably arranged on the telescopic end of the No. 2 cylinder 51, and the upper and lower end surfaces of the crossbeam 31 are symmetrically arranged. There is a transverse guide rail 32, a rack 33 is provided on the front end face of the crossbeam 31, a transverse wheel 35 for engaging with the transverse guide rail 32 is rotatably provided on the rear end face of the transverse seat 34, a chain frame 36 is provided on the upper end face of the crossbeam 31, a No. 3 stroke chain 37 is movably provided on the chain frame 36, one end of the No. 3 stroke chain 37 is connected to the transverse seat 34, a No. 4 power source 38 is provided on the transverse seat 34, a gear plate connected to the output end of the No. 4 power source 38 is rotatably provided on the rear end face of the transverse seat 34, and the gear plate and the rack 33 are meshed with each other, a mounting seat 40 for supporting the middle part of the deflection plate 41 is provided on the upper end face of the fixed frame 39, a No. 1 cylinder 43 for controlling the movement of the card wheel 44 is provided on the top end of the V-shaped connecting rod 42, and the deflection plate 41 is provided on the upper end face of the fixed frame 39. A fifth power source 46 is provided on the plate 41, and a synchronous wheel 47 is provided at the output end of the fifth power source 46 and one end of the grinding wheel 45. A transmission belt 48 is sleeved on the outer side of the synchronous wheel 47, and a tensioning roller 49 for supporting the transmission belt 48 is provided on one side of the V-shaped connecting rod 42. A transverse guide rail 32 is provided on the upper and lower end surfaces of the crossbeam 31, and a rack 33 is provided on the front end surface. The transverse shift seat 34 is engaged with the transverse guide rail 32 through the transverse shift wheel 35, and the gear plate is driven by the fourth power source 38 to move along the rack 33, so as to realize the synchronous reverse adjustment of the symmetrically distributed double transverse shift seats 34. A fixed frame 39 is provided on the transverse shift seat 34, and a deflection plate 41 is movably provided on the top thereof, and the card wheel 44 and the grinding wheel 45 are connected through the V-shaped connecting rod 42, and the support spring 50 is connected to the second cylinder 51. The angle of the deflection plate is controlled by fine-tuning the connecting rod 52 to achieve dynamic fitting of the grinding wheel 45 to the outer circle of the workpiece. The fifth power source 46 drives the grinding wheel 45 to rotate at high speed through the synchronous wheel 47 and the transmission belt 48. The standardized interface of the grinding wheel 45 supports the rapid switching of grinding wheels of different grain sizes and adapts to the requirements of multiple processes such as rough grinding and fine grinding. The tensioning roller 49 ensures the stability of the transmission belt. The V-shaped connecting rod 42 and the second cylinder 51 are linked to each other, combined with the elastic compensation of the support spring 50, so that the grinding wheel 45 can dynamically and adaptively fit the outer circle of the workpiece, and can automatically adapt to the deformation error of 0.1-0.5mm on the workpiece surface to ensure the uniformity of grinding. The bidirectional symmetrical adjustment of the transverse seat 34 and the meshing structure of the rack 33 make the feeding accuracy of the grinding wheel 45 reach ±0.02mm, to avoid the workpiece deflection caused by unilateral force.

[0041] This solution can handle super-large workpieces with a diameter of more than 1.2m and a length of 6m. By adding a laser ranging sensor (not shown in the attached figure) to monitor the wear of the grinding wheel in real time and feed it back to the No. 2 cylinder 51 for pressure compensation, the service life of the grinding wheel can be further extended by more than 30%.

[0042] A method for using an external cylindrical grinder for girth welding processing comprises the following steps:

[0043] Step 1: First, clean and inspect the tank workpiece 8 to be polished;

[0044] Step 2: Open the protective cover, start the No. 1 power source 6 according to the size of the tank workpiece 8, and drive the screw 4 to rotate through the No. 1 power source 6 to adjust the distance between the two sets of limit rollers 9, and use the two sets of limit rollers 9 to support the tank workpiece 8;

[0045] Step 3: Adjust the position of the positioning member 11, and limit one end of the tank workpiece 8 by the positioning member 11;

[0046] Step 4: Start the fourth power source 38 to drive the two sets of grinding components to move to the annular seam of the tank workpiece 8 that needs to be polished, and then start the third power source 24 to control the grinding components set on the crossbeam 31 to descend to the corresponding working point;

[0047] Step 5: Start the No. 2 cylinder 51 to adjust one end of the deflection plate 41, thereby controlling the angle of the other end, so that the snap-on wheel 44 and the grinding wheel 45 can form a certain angle to fit the tank workpiece 8.

[0048] Step 6, start the No. 2 power source 12 and the No. 5 power source 46. The No. 2 power source 12 drives a corresponding set of limit rollers 9 to rotate, thereby driving the tank workpiece 8 to rotate. The No. 5 power source 46 drives the grinding wheel 45 to rotate to grind the annular seam on the tank workpiece 8.

[0049] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An external cylindrical grinding machine for girth welding processing, including a protective cover; characterized in that: A base (1) is arranged in the protective cover, and a lifting component for driving the grinding component to move up and down is arranged on the base (1); The lifting assembly comprises a horizontally and vertically arranged column (15) and a horizontally and laterally arranged beam (31) that moves up and down along the column (15); The grinding assembly comprises a transverse displacement seat (34) slidably arranged on the crossbeam (31), and the transverse displacement seat (34) is symmetrically distributed at both ends of the crossbeam (31), a fixed frame (39) is arranged on one side of the transverse displacement seat (34), a deflection plate (41) is movably arranged on the upper end surface of the fixed frame (39), a V-shaped connecting rod (42) is arranged on the lower end surface of the deflection plate (41), a snap-on wheel (44) and a grinding wheel (45) are rotatably arranged at the top and bottom ends of the V-shaped connecting rod (42), a support spring (50) for supporting one end of the deflection plate (41) is arranged at one end of the fixed frame (39) close to the V-shaped connecting rod (42), a No. 2 cylinder (51) is arranged at one end of the fixed frame (39) away from the support spring (50), and a fine-tuning connecting rod (52) for driving the other end of the deflection plate (41) to rise and fall is movably arranged at the telescopic end of the No. 2 cylinder (51).

2. The cylindrical grinding machine for girth welding according to claim 1, characterized in that: The upper end surface of the base (1) is symmetrically provided with a horizontally and vertically distributed loading guide rail (2), the loading guide rail (2) is slidably sleeved with a loading rack (3), and the loading rack (3) is symmetrically distributed at both ends of the loading guide rail (2), a screw rod (4) is sleeved at the bottom center of the loading rack (3), one end of the screw rod (4) is provided with a first bevel gear (5), the base (1) is provided with a first power source (6) for driving the screw rod (4) to rotate, and the output end of the first power source (6) is provided with a second bevel gear (7) meshing with the first bevel gear (5).

3. The cylindrical grinding machine for girth welding processing according to claim 2, characterized in that: The carrier (3) is rotatably mounted with a limiting roller (9) for carrying the tank workpiece (8); the upper end surface of the base (1) is symmetrically provided with horizontally and vertically distributed end bars (10), and the end bars (10) are located between the carriers (3); and the end bars (10) are provided with a positioning member (11) for limiting one end of the tank workpiece (8).

4. The cylindrical grinding machine for girth welding according to claim 3, characterized in that: A second power source (12) is disposed on the upper end surface of the base (1), a first sprocket (13) is disposed at the output end of the second power source (12) and one end of a set of limit rollers (9), and a first chain (14) is meshedly disposed on the outer side of the first sprocket (13).

5. The cylindrical grinding machine for girth welding according to claim 1, characterized in that: The two sides of the column (15) are symmetrically provided with lifting guide rails (16), the rear end surface of the column (15) is symmetrically provided with a counterweight guide rail (17), the top of the column (15) is provided with a reserved groove (18), the front end surface of the column (15) is slidably provided with a lifting seat (19) connected to the cross beam (31), and the lifting seat (19) is rotatably provided with a limiting wheel (20) for engaging with the lifting guide rail (16).

6. The cylindrical grinding machine for girth welding processing according to claim 5, characterized in that: A counterweight box (21) is provided on the sliding sleeve of the counterweight guide rail (17), and the counterweight box (21) is connected to the lifting seat (19) through a No. 2 chain (22), and the No. 2 chain (22) runs through the reserved groove (18), and a No. 2 sprocket (23) meshing with the No. 2 chain (22) is rotatably provided inside the reserved groove (18), and a No. 3 power source (24) for driving the No. 2 sprocket (23) is provided on one side of the top end of the column (15), and guide sprockets (25) for guiding the No. 2 chain (22) are symmetrically provided on the front and rear end surfaces of the column (15), and the guide sprocket (25) and the No. 2 chain (22) are meshed with each other.

7. The cylindrical grinding machine for girth welding according to claim 5, characterized in that: Auxiliary guide rails (26) are symmetrically arranged on both sides of the column (15); a travel seat (27) is slidably arranged on the auxiliary guide rail (26), and the travel seat (27) is connected to the lifting seat (19); a clamping wheel (28) for engaging the auxiliary guide rail (26) is rotatably arranged on the travel seat (27); a No. 1 travel chain (29) connected to the bottom end of the column (15) is arranged on the travel seat (27); a No. 2 travel chain (30) is arranged at the bottom end of the No. 1 travel chain (29), and one end of the No. 2 travel chain (30) is connected to the middle part of the No. 1 travel chain (29).

8. The cylindrical grinding machine for girth welding according to claim 1, characterized in that: The upper and lower end surfaces of the cross beam (31) are symmetrically provided with transverse guide rails (32), the front end surface of the cross beam (31) is provided with a rack (33), the rear end surface of the transverse shift seat (34) is rotatably provided with a transverse shift wheel (35) for engaging with the transverse guide rail (32), the upper end surface of the cross beam (31) is provided with a chain frame (36), a third travel chain (37) is movably provided on the chain frame (36), one end of the third travel chain (37) is connected to the transverse shift seat (34), a fourth power source (38) is provided on the transverse shift seat (34), and a gear plate connected to the output end of the fourth power source (38) is rotatably provided on the rear end surface of the transverse shift seat (34), and the gear plate and the rack (33) are meshed with each other.

9. The cylindrical grinding machine for girth welding according to claim 1, characterized in that: A mounting seat (40) for supporting the middle part of the deflection plate (41) is arranged on the upper end surface of the fixing frame (39); a No. 1 cylinder (43) for controlling the movement of the snap-on wheel (44) is arranged at the top end of the V-shaped connecting rod (42); a No. 5 power source (46) is arranged on the deflection plate (41); a synchronous wheel (47) is arranged at the output end of the No. 5 power source (46) and one end of the grinding wheel (45); a transmission belt (48) is sleeved on the outer side of the synchronous wheel (47); and a tensioning roller (49) for supporting the transmission belt (48) is arranged on one side of the V-shaped connecting rod (42).

10. The method for using the cylindrical grinding machine for girth welding according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: First, clean and inspect the tank workpiece (8) to be polished; Step 2: Open the protective cover, start the first power source (6) according to the size of the tank workpiece (8), and drive the screw rod (4) to rotate through the first power source (6) to adjust the distance between the two sets of limit rollers (9), and use the two sets of limit rollers (9) to support the tank workpiece (8); Step 3: adjusting the position of the positioning member (11) so as to limit one end of the tank workpiece (8) by the positioning member (11); Step 4: Start the fourth power source (38) to drive the two sets of grinding components to move to the annular seam of the tank workpiece (8) that needs to be polished, and then start the third power source (24) to control the grinding components set on the crossbeam (31) to descend to the corresponding working point; Step 5: Start the No. 2 air cylinder (51) to adjust one end of the deflection plate (41), thereby controlling the angle of the other end, so that the snap-on wheel (44) and the grinding wheel (45) can form a certain angle to fit the tank workpiece (8). Step 6: Start the second power source (12) and the fifth power source (46). The second power source (12) drives a corresponding set of limit rollers (9) to rotate, thereby driving the tank workpiece (8) to rotate. The fifth power source (46) drives the grinding wheel (45) to rotate to grind the annular seam on the tank workpiece (8).

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