A straight seam welding machine

Abstract

The application provides a novel straight seam welding machine, which comprises a workbench, wherein the workbench is respectively provided with: a feeding seam searching mechanism, which is used for searching a welding seam of a workpiece to be welded; a welding mechanism, which is used for welding the welding seam; a pushing mechanism, which is used for pushing the workpiece to be welded from the feeding seam searching mechanism to the welding mechanism; a guiding mechanism, which is arranged in the pushing frame and is used for guiding the movement of the workpiece to be welded; a diameter gauge mechanism, which is correspondingly arranged below the welding mechanism, wherein the diameter gauge mechanism is provided with a first diameter gauge roller and a second diameter gauge roller and is used for producing products with different diameters; and a type changing mechanism, which comprises a connecting rod device and a type changing oil cylinder, wherein the connecting rod device is connected with the first diameter gauge roller and the second diameter gauge roller respectively, and the type changing oil cylinder drives the connecting rod device to operate, so that the first diameter gauge roller and the second diameter gauge roller are replaced. The diameter gauge roller can be replaced without disassembly, the diameter gauge precision is improved, the labor cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of straight seam welding, and in particular relates to a novel straight seam welding machine. Background Art

[0002] Currently, the water heater industry uses straight seam welding equipment for the inner tank. Sizing gauges are the core component of straight seam welding equipment. Existing straight seam welding equipment uses one set of sizing gauges for each product diameter. To produce products with different diameters, the sizing gauges must be switched. Each changeover requires the use of lifting tools or the combined efforts of several people to remove and replace the sizing gauges. Each set of sizing gauges in existing equipment weighs over 100 kilograms, posing a safety hazard during replacement. Furthermore, each changeover requires adjusting the relative position and dimensions. This technical difficulty and time-consuming process make it difficult to implement in large-scale industrial production. Summary of the Invention

[0003] The present invention proposes a novel straight seam welding machine, which can directly realize the replacement of two different sizing rollers through a changing mechanism, without the need to disassemble the sizing rollers to replace them, thereby improving the sizing accuracy, reducing labor costs and improving production efficiency.

[0004] The technical solution of the present invention is achieved as follows: A new straight seam welding machine includes a workbench, on which are respectively provided:

[0005] The sizing gauge mechanism is provided with a plurality of sizing roller connecting frames, each of which is provided with a plurality of sizing rollers of different models for producing products of different diameters;

[0006] The type-changing mechanism comprises a driving device for driving a plurality of the sizing roller connecting frames to rotate simultaneously, so as to switch sizing rollers of the same type to a working position.

[0007] Since the sizing rollers of different specifications are arranged in the sizing gauge mechanism of the present invention, it can be suitable for products with different diameter requirements. When replacement is needed, the two different sizing rollers can be switched directly through the changing mechanism, and there is no need to replace the sizing rollers by disassembling. This improves the sizing accuracy, reduces labor costs, and improves production efficiency.

[0008] As a preferred embodiment, the sizing gauge mechanism further includes:

[0009] A sizing gauge fixing plate, the center of which is provided with a through hole for the workpiece to be welded to pass through;

[0010] The sizing gauge fixing frames include a plurality of sizing gauge fixing frames, which are evenly distributed around the through-port along the circumference. The sizing gauge fixing frames are arranged in a triangular shape. The longitudinal cross-sectional area of ​​the sizing gauge fixing frame at one end close to the sizing gauge fixing plate is larger than the longitudinal cross-sectional area of ​​the sizing gauge fixing frame at one end away from the sizing gauge fixing plate. A plurality of spacers are arranged inside the sizing gauge fixing frame along the length direction.

[0011] The roller assembly includes several groups, which are evenly distributed along the length direction and arranged on the inner side of the sizing gauge fixing frame. The roller assembly includes the first sizing roller, the second sizing roller and the rotating shaft. The first sizing roller, the second sizing roller and the rotating shaft are connected by the sizing roller connecting frame. The first sizing roller, the second sizing roller and the rotating shaft are arranged in a triangle, wherein the rotating shaft and the sizing gauge fixing frame are rotatably connected.

[0012] The present invention performs sizing processing on the workpiece to be welded by using a sizing gauge fixing frame. Multiple sizing gauge fixing frames are used to simultaneously size the workpiece from multiple angles, thereby improving accuracy. At the same time, the first sizing roller and the second sizing roller are replaced by the rotation of the rotating shaft, thereby achieving the effect of producing products with different diameters.

[0013] As a preferred embodiment, the mold changing mechanism includes:

[0014] A first changing plate is fixedly arranged on one side of the sizing gauge fixing frame;

[0015] The second changing plate is arranged on one side of the first changing plate. A changing cylinder is fixedly arranged on one side of the second changing plate. The end of the changing cylinder passes through the second changing plate and is fixedly connected to the first changing plate.

[0016] A connecting rod device, comprising a connecting rod, the connecting rod being connected to a plurality of the first sizing rollers;

[0017] The driving device includes a gear and a rack. The gear is sleeved on the outside of one of the rotating shafts. The rack is fixed to one side of the sizing gauge fixing frame through a driving block. The rack and the gear are meshed. One end of the rack passes through the driving block, and the other end of the rack passes through the first changing disk and is fixedly connected between the second changing disk.

[0018] When the first sizing roller and the second sizing roller need to be replaced according to product requirements, the second sizing disc is moved closer to or away from the first sizing disc through the operation of the changing cylinder, thereby moving the rack. Under the meshing action of the rack and the gear, the gear rotates, thereby driving the rotating shaft to rotate. Under the action of the connecting rod, several rotating shafts rotate at the same time, thereby realizing the replacement of the first sizing roller and the second sizing roller.

[0019] As a preferred embodiment, a welding mechanism is further provided on the workbench, and the welding mechanism is correspondingly provided above the sizing gauge mechanism, and the welding mechanism includes:

[0020] A welding frame, one side of which is connected to a welding slide;

[0021] The welding plate is arranged on one side of the welding frame and is slidably connected to the welding slideway;

[0022] The welding cylinder is fixedly arranged on the top of the welding frame, and the end of the welding cylinder is connected to the welding plate;

[0023] The welding machine is connected to one side of the welding plate and is used for welding the welding seam.

[0024] The present invention drives the welding plate to move up and down by the welding oil cylinder, thereby realizing the up and down movement of the welding machine and welding the welding seam.

[0025] As a preferred embodiment, the workbench is further provided with a lifting mechanism, which includes:

[0026] A jacking fixing frame is arranged below the sizing gauge fixing plate, and a jacking cylinder is arranged on the top of the jacking fixing frame;

[0027] The jacking slide is arranged above the jacking fixed frame, the sizing gauge fixing plate is slidably arranged on one side of the jacking slide, and the end of the jacking cylinder and the sizing gauge fixing plate are connected.

[0028] The present invention enables the sizing gauge fixing plate to be raised and lowered by the operation of the lifting oil cylinder, and realizes the sizing of the workpiece to be welded in cooperation with the through-hole, thereby improving the accuracy of the sizing of the workpiece to be welded.

[0029] As a preferred embodiment, the workbench is further provided with a feeding and seam-finding mechanism, which includes:

[0030] A feed fixing frame, fixedly arranged on the top of the workbench;

[0031] A seam-finding fixture is fixedly arranged on the top of the feed fixture and determines the welding seam of the workpiece to be welded through a sensor;

[0032] The rotating device includes two identical groups, which are arranged side by side. Each group of rotating devices includes two rotating frames. The two rotating frames are both arranged on the top of the feed fixed frame. A rotating drum is rotatably arranged between the two rotating frames. The top surface of the rotating drum is in contact with the bottom surface of the workpiece to be welded. A rotating motor is arranged on one side of the rotating frame. The rotating motor is connected to one of the rotating drums through a transmission connection. The two rotating drums are connected through a transmission belt. The workpiece to be welded is set on the top of the rotating device and rotated by the operation of the rotating device.

[0033] Since the top surface of the rotating drum contacts the bottom surface of the workpiece to be welded, the present invention drives the rotating drum to rotate by the rotating motor, thereby achieving the effect of finding the welding seam in cooperation with the seam finding fixing frame, so that the welding seam is located at the top and corresponds to the welding point of the welding structure.

[0034] As a preferred embodiment, the workbench is further provided with a pushing mechanism, which includes:

[0035] A pusher rack is fixedly arranged on the top of the workbench, the sizing gauge mechanism is connected to one side of the pusher rack, and the feeding and seam-finding mechanism is connected to the other side of the pusher rack;

[0036] A first pushing device, comprising a first pushing plate, for pushing the workpiece to be welded from the feeding and seam-finding mechanism to the pushing rack;

[0037] A second pushing device, comprising a second pushing plate, for pushing the workpiece to be welded to a third pushing device;

[0038] The third pushing device includes a third pushing plate, which is used to push the workpiece to be welded to the welding structure.

[0039] As a preferred embodiment, the first pushing device includes a first pushing slide, the first pushing plate is slidably arranged on the top of the first pushing slide, the first pushing plate is arranged in a Y shape, a first propulsion cylinder is provided on one side of the first pushing slide, and the end of the first propulsion cylinder is fixedly connected to the first pushing plate;

[0040] The second pushing device includes a pushing chain, and chain wheels are respectively provided at both ends of the pushing chain. The second pushing plate is fixedly provided on the pushing chain, and the pushing chain is fixed to the top of the pushing frame through a chain fixing frame. A second pushing motor is provided on the top of the chain fixing frame, and a transmission connection is provided between the second pushing motor and one of the chain wheels;

[0041] The third pushing device is arranged on one side of the second pushing device, and the third pushing device includes a third pushing motor, and the end transmission connection of the third pushing motor is provided with a screw rod, and the outer side of the screw rod is provided with a third pushing block, and the third pushing block and the screw rod are threadedly connected. A third pushing slide is provided above the screw rod, and the third pushing block and the third pushing slide are slidingly connected. The inner end of the third pushing plate and the third pushing block are hinged, and the outer end of the third pushing plate and the third pushing block are connected by a spring, and the third pushing plate is arranged in a triangular shape.

[0042] The present invention operates the first pushing cylinder after the sensor is used to find the seam of the workpiece to be welded, and the first pushing plate pushes the workpiece to be welded from the rear end to move into the pushing rack. The second pushing motor drives the chain wheel to rotate, and the pushing chain is transmitted. The second pushing plate moves along with the pushing chain, and pushes the workpiece to be welded from the rear end to move to the third pushing device. The third pushing motor drives the screw rod to rotate, so that the third pushing block moves. The third pushing block first moves to the rear end of the workpiece to be welded. During the movement, the third pushing plate and the workpiece to be welded abut against each other, causing the third pushing plate to stretch. After reaching the rear end position, the spring returns to the initial position, and the third pushing plate pushes the workpiece to be welded to move to the welding mechanism.

[0043] As a preferred embodiment, a guide mechanism is further provided on the pusher frame, and the guide mechanism includes two groups, both of which are provided on the inner side of the pusher frame, and the guide mechanism includes:

[0044] A guide slide is fixedly arranged on the inner side of the pusher frame, and a guide slide plate is slidably arranged on the guide slide;

[0045] The guide oil cylinder is arranged below the guide slideway, the guide oil cylinder is fixedly connected to the pusher rack, and the end of the guide oil cylinder is connected to the guide slide plate;

[0046] The movable plate is connected to one side of the guide slide plate, the movable plate is arranged in an arc shape, and a plurality of guide blocks are arranged on the movable plate;

[0047] The guide columns include several guide columns and guide blocks which are arranged in a one-to-one correspondence. The guide columns and guide blocks are connected by clamping blocks. The inner side surfaces of the guide columns are in contact with the outer side surfaces of the workpieces to be welded, thereby guiding the movement of the workpieces to be welded.

[0048] As a preferred embodiment, the guide mechanism further includes a limit plate, which is arranged on the inner side of the movable plate, is fixedly connected to the pusher frame, is arranged in an arc shape, and is provided with a plurality of limit openings;

[0049] The movable plate is provided with a plurality of movable slideways, the guide block is slidably connected to the movable slideways, and the end of the guide block is inserted into the limiting opening and slidably connected to the limiting opening;

[0050] A sliding column is provided on the inner side of the movable plate, a pulley is provided on the end of the sliding column, and the pulley is connected to the side wall of the limiting plate in a rolling manner.

[0051] The present invention controls the lifting and lowering of the guide slide plate through the guide oil cylinder, thereby controlling the movement of the movable plate. During the movement of the movable plate, the guide block moves along the movable slideway and slides in the limit opening at the same time, thereby driving the guide column to move. Not only can it guide the workpiece to be welded during its movement to prevent the welded workpiece from falling off, but it can also adapt to workpieces to be welded of different specifications, avoiding the inconvenience of replacing the guide mechanism due to workpieces of different specifications, and improving work efficiency.

[0052] After adopting the above technical solution, the beneficial effects of the present invention are:

[0053] The present invention places the workpiece to be welded on a feeding and seam-finding mechanism, which automatically searches for the welding seam of the workpiece to be welded. After the search is completed, the workpiece to be welded is moved by a pushing mechanism. At the same time, during the movement, the guide mechanism is cooperated to send the workpiece to be welded to the welding mechanism for welding the welding seam, and the workpiece is sized so that the workpiece finally forms a product with a predetermined diameter.

[0054] Since the sizing gauge mechanism of the present invention is provided with two sizing rollers of different specifications, it can be suitable for products with different diameter requirements. When replacement is needed, the two different sizing rollers can be replaced directly through the changing mechanism, and there is no need to replace the sizing rollers by disassembly. While improving the sizing accuracy, it reduces labor costs and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0056] Figure 1 It is a structural schematic diagram of the present invention;

[0057] Figure 2 It is a front view of the present invention;

[0058] Figure 3 is a side view of the present invention;

[0059] Figure 4 A top view of the present invention;

[0060] Figure 5 It is a structural diagram of the feeding and seam-finding mechanism;

[0061] Figure 6 Schematic diagram of the structure of the guide mechanism;

[0062] Figure 7 It is a structural diagram of the welding mechanism;

[0063] Figure 8 It is a structural diagram of the sizing gauge mechanism;

[0064] Figure 9 It is a side view of the sizing gauge mechanism;

[0065] Figure 10 It is a structural diagram of the sizing gauge fixing frame;

[0066] Figure 11 This is the main view of the sizing gauge holder;

[0067] Figure 12 It is another structural schematic diagram of the present invention;

[0068] Figure 13 Schematic diagram of the structure of the first pushing device;

[0069] Figure 14 Schematic diagram of the structure of the second pushing device;

[0070] Figure 15 Schematic diagram of the structure of the third pushing device;

[0071] Figure 16 It is a structural schematic diagram of the third pushing block.

[0072] In the figure, 1-feeding and seam-finding mechanism; 2-pushing mechanism; 3-guiding mechanism; 4-welding structure; 5-sizing gauge mechanism; 6-mold-changing mechanism; 7-lifting mechanism; 8-workpiece to be welded; 9-workbench; 10-feeding fixed frame; 11-seam-finding fixed frame; 12-rotating frame; 14-rotating drum; 20-pushing frame; 21-first pushing device; 22-second pushing device; 23-third pushing device; 30-guide cylinder; 31-guide slide; 32-guide slide; 33-moving plate; 34-limiting plate; 35-guide column; 330-moving slide; 331-guide block; 332-clamping block; 333-sliding column; 334-pulley; 335-limiting opening; 40-welding frame; 41-welding slide; 42-welding plate; 43-welding machine; 44- Welding cylinder; 50-sizing gauge fixing plate; 51-sizing gauge fixing frame; 52-spacer plate; 53-sizing roller connecting frame; 54-first sizing roller; 55-second sizing roller; 56-rotating shaft; 60-first changing plate; 61-second changing plate; 62-connecting rod; 63-gear; 64-rack; 65-driving block; 70-jacking fixing frame; 71-jacking slide; 72-jacking cylinder; 210-first pushing slide; 211-first pushing plate; 212-first pushing cylinder; 220-pushing chain; 221-chain fixing frame; 222-chain pulley; 223-second pushing plate; 230-third pushing slide; 231-third pushing block; 232-third pushing plate; 233-spring; 234-third pushing motor; 235-screw rod. DETAILED DESCRIPTION

[0073] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0074] according to Figures 1 to 16 As shown, a novel straight seam welding machine includes a workbench 9, on which is mounted a feed and seam-finding mechanism 1. The seam-finding mechanism includes a feed fixture 10, which is fixedly mounted on the top of the workbench 9. A seam-finding fixture 11 is mounted on top of the feed fixture 10. The seam-finding fixture 11 scans and determines the weld seam of the workpiece 8 to be welded. A rotating device is also mounted on top of the feed fixture 10. The rotating device comprises two parts. The workpiece 8 to be welded is mounted on top of the rotating device and rotated by the operation of the rotating device.

[0075] The rotating device includes two rotating frames 12, with a rotating drum 14 rotatably positioned between the two rotating frames 12. The top surface of the rotating drum 14 contacts the bottom surface of the workpiece 8 to be welded. A rotating motor is disposed on one side of the rotating frame 12. The rotating motor and the rotating drum 14 are connected by a transmission belt. The two rotating drums are connected by a transmission belt. Because the top surface of the rotating drum 14 contacts the bottom surface of the workpiece 8 to be welded, the present invention uses the rotating motor to drive the rotating drum 14 to rotate, thereby achieving the effect of cooperating with the sensor on the seam-finding fixed frame 11 to find the weld seam, so that the weld seam is located at the top, corresponding to the weld point of the weld structure.

[0076] The present invention places the workpiece 8 to be welded on the top of the rotating device, and rotates the workpiece 8 to be welded by the rotating device until the seam-finding fixing frame 11 finds the welding seam, thereby realizing the function of automatic positioning, so that when the workpiece 8 to be welded is pushed to the welding machine 43, the welding seam can be welded just in time, thereby improving work efficiency.

[0077] A pushing mechanism 2 is also provided on the workbench 9, and the pushing mechanism 2 includes a pushing rack 20, which is fixedly arranged on the top of the workbench 9, and the feed fixing frame 10 is arranged on one side of the pushing rack 20. The pushing mechanism 2 also includes a first pushing device, and the first pushing device includes a first pushing slide 210, and the first pushing plate 211 is slidably arranged on the top of the first pushing slide, and the first pushing plate 211 is arranged in a Y shape. A first thrust cylinder 212 is provided on one side of the first pushing slide 210, and the end of the first thrust cylinder and the first pushing plate 211 are fixedly connected.

[0078] The second pushing device of the pushing mechanism 2 includes a pushing chain 220, and chain wheels 222 are respectively provided at both ends of the pushing chain 220. The second pushing plate 223 is fixedly provided on the pushing chain 220. The pushing chain is fixed to the top of the pushing frame through a chain fixing frame 221. A second pushing motor is provided on the top of the chain fixing frame 221. A transmission connection is provided between the second pushing motor and one of the chain wheels;

[0079] The third pushing device is arranged on one side of the second pushing device, and the third pushing device includes a third pushing motor 234, and the end transmission connection of the third pushing motor is provided with a screw rod 235, and the outer side of the screw rod 235 is provided with a third pushing block 231, and the third pushing block 231 and the screw rod 235 are threadedly connected. A third pushing slide is provided above the screw rod 235, and the third pushing block 231 and the third pushing slide 230 are slidingly connected. The inner end of the third pushing plate 232 is hinged to the third pushing block 231, and the outer end of the third pushing plate 232 is connected to the third pushing block by a spring, and the third pushing plate 232 is arranged in a triangular shape.

[0080] The present invention operates the first pushing cylinder after the sensor is used to find the seam of the workpiece to be welded, and the first pushing plate pushes the workpiece to be welded from the rear end to move into the pushing rack. The second pushing motor drives the chain wheel to rotate, and the pushing chain is transmitted. The second pushing plate moves along with the pushing chain, and pushes the workpiece to be welded from the rear end to move to the third pushing device. The third pushing motor drives the screw rod to rotate, so that the third pushing block moves. The third pushing block first moves to the rear end of the workpiece to be welded. During the movement, the third pushing plate and the workpiece to be welded abut against each other, causing the third pushing plate to stretch. After reaching the rear end position, the spring returns to the initial position, and the third pushing plate pushes the workpiece to be welded to move to the welding mechanism.

[0081] The pusher 20 is provided with a guide mechanism 3, which includes two groups. Both guide mechanisms 3 are provided on the inner side of the pusher 20 and on both sides of the workpiece 8 to be welded. The guide mechanism 3 includes a guide slide 31, which is fixedly provided on the inner side of the pusher 20. A guide slide 32 is slidably provided on the guide slide 31. A guide cylinder 30 is provided below the guide slide 31. The guide cylinder 30 is fixedly connected to the pusher 20, and the end of the guide cylinder 30 is connected to the guide slide 32. The guide slides 32 are connected to each other, and a movable plate 33 is connected to one side of the guide slide 32. The movable plate 33 is arranged in an arc shape, and a plurality of movable slides 330 are arranged on the movable slide 330. A guide block 331 is slidably arranged on the movable slide 330. A clamping block 332 is connected to one side of the guide block 331, and a guide column 35 is connected to the end of the clamping block 332. The inner side surface of the guide column 35 is in contact with the outer side surface of the workpiece 8 to be welded, thereby guiding the movement of the workpiece 8 to be welded.

[0082] The guide mechanism 3 also includes a limit plate 34, which is disposed inside the movable plate 33 and is fixedly connected to the pusher frame 20. The limit plate 34 is arranged in an arc shape and has a plurality of limit openings 340. The ends of the guide blocks 331 are inserted into the limit openings 340 and are slidably connected thereto. A slide post 333 is also disposed inside the movable plate 33, and a pulley 334 is disposed at the end of the slide post 333. The pulley 334 is configured to be rollingly connected to the side wall of the limit plate 34.

[0083] The present invention controls the lifting and lowering of the guide slide 32 through the guide cylinder 30, thereby controlling the movement of the movable plate 33. During the movement of the movable plate 33, the guide block 331 moves along the movable slide 330 and slides in the limiting opening 340, thereby driving the guide column 35 to move. It can not only guide the workpiece 8 to be welded during its movement to prevent it from falling off, but also can adapt to workpieces 8 to be welded of different specifications, avoiding the inconvenience of replacing the guide mechanism 3 due to workpieces of different specifications, and improving work efficiency.

[0084] The pusher 20 is further provided with a welding structure on one side away from the feeding and seam-finding mechanism 1. The welding machine 43 structure 4 includes a welding frame 40, which is fixedly arranged on the top of the pusher 20. A welding slide 41 is provided on one side of the welding frame 40. A welding plate 42 is slidably provided on the welding slide 41. A welding oil cylinder 44 is fixedly provided on the top of the welding frame 40. The end of the welding oil cylinder 44 is connected to the welding plate 42. A welding machine 43 is provided on one side of the welding plate 42 for welding the welding seam. In this embodiment, the welding machine 43 and the seam-finding fixed frame 11 are both prior art and are purchased on the market. Therefore, no further details will be given here. The present invention drives the welding plate 42 to move up and down by the welding oil cylinder 44, thereby realizing the up and down movement of the welding machine 43 to weld the welding seam.

[0085] A sizing gauge mechanism 5 is provided below the welding machine 43. The sizing gauge mechanism 5 includes a sizing gauge fixing plate 50, which is connected to one side of the pusher frame 20 via a lifting mechanism 7. A passage is provided in the middle of the sizing gauge fixing plate 50 for the workpiece 8 to be welded to pass through. Several sizing gauge fixing brackets 51 are evenly distributed around the passage along the circumference. The sizing gauge fixing brackets 51 are arranged in a triangular shape. The longitudinal cross-sectional area of ​​the sizing gauge fixing bracket 51 near the sizing gauge fixing plate 50 is larger than the longitudinal cross-sectional area of ​​the sizing gauge fixing bracket 51 away from the sizing gauge fixing plate 50. Several spacers 52 are provided along the length direction of the sizing gauge fixing bracket 51.

[0086] Several groups of roller assemblies are evenly distributed along the length direction on the inner side of the sizing gauge fixing frame 51. The roller assembly includes a first sizing roller 54, a second sizing roller 55 and a rotating shaft 56. The first sizing roller 54 and the second sizing roller 55 are of different models and are used for sizing products with different requirements. The first sizing roller 54, the second sizing roller 55 and the rotating shaft 56 are connected by a sizing roller connecting frame 53. The first sizing roller 54, the second sizing roller 55 and the rotating shaft 56 are arranged in a triangle, wherein the rotating shaft 56 and the sizing gauge fixing frame 51 are rotatably connected.

[0087] The present invention performs sizing processing on the workpiece 8 to be welded by using a sizing gauge fixing frame 51. Multiple sizing gauge fixing frames 51 are used to simultaneously size the workpiece from multiple angles, thereby improving accuracy. At the same time, through the rotation of the rotating shaft 56, the first sizing roller 54 and the second sizing roller 55 are replaced, thereby achieving the effect of producing products with different diameters.

[0088] The jacking mechanism 7 includes a jacking fixed frame 70, which is fixedly arranged on one side of the pusher frame 20, and the jacking fixed frame 70 is arranged below the sizing gauge fixing plate 50. A jacking cylinder 72 is provided on the top of the jacking fixed frame 70, and a jacking slide 71 is fixedly arranged on one side of the pusher frame 20. The jacking slide 71 is arranged above the jacking fixed frame 70. The sizing gauge fixing plate 50 is arranged on one side of the jacking slide 71 and is slidably connected to the jacking slide 71. The end of the jacking cylinder 72 is connected to the sizing gauge fixing plate 50. The present invention operates the jacking cylinder 72 to lift the sizing gauge fixing plate 50, and cooperates with the through port to achieve sizing of the workpiece 8 to be welded, thereby improving the accuracy of sizing of the workpiece 8 to be welded.

[0089] One end of the sizing gauge fixing frame 51 is connected to the sizing gauge fixing plate 50, and the other end of the sizing gauge fixing frame 51 is connected to the changing mechanism 6. The changing mechanism 6 includes a first changing disk 60, and the first changing disk 60 and the sizing gauge fixing frame 51 are fixedly connected. The second changing disk 61 is set on one side of the first changing disk 60, and the changing cylinder is fixedly set on one side of the second changing disk 61. After the end of the changing cylinder passes through the second changing disk 61, it is fixedly connected to the first changing disk 60.

[0090] The connecting rod device includes a connecting rod 62, which is connected to several first sizing rollers 54. The driving device includes a gear 63 and a rack 64. The gear 63 is sleeved on the outside of one of the rotating shafts 56. The rack 64 is fixed to one side of the sizing gauge fixing frame 51 through a driving block 65. The rack 64 and the gear 63 are meshed with each other. One end of the rack 64 passes through the driving block 65, and the other end of the rack 64 passes through the first changing disk 60 and is fixedly connected to the second changing disk 61.

[0091] When the first sizing roller 54 and the second sizing roller 55 need to be replaced according to product requirements, the second sizing disc 61 is moved closer to or away from the first sizing disc 60 through the operation of the changing cylinder, thereby moving the rack 64. Under the meshing action of the rack 64 and the gear 63, the gear 63 rotates, thereby driving the rotating shaft 56 to rotate. Under the action of the connecting rod 62, several rotating shafts 56 rotate at the same time, thereby realizing the replacement of the first sizing roller 54 and the second sizing roller 55.

[0092] The present invention places the workpiece 8 to be welded on the feeding and seam-finding mechanism 1, and the feeding and seam-finding mechanism 1 automatically searches for the welding seam of the workpiece 8 to be welded. After the search is completed, the workpiece 8 to be welded is moved by the pushing mechanism 2. At the same time, during the movement, the guide mechanism 3 is cooperated to send the workpiece 8 to the welding machine 43 to the welding seam 4 for welding, and the workpiece is sized so that the workpiece finally forms a product with a predetermined diameter.

[0093] Since the present invention provides two sizing rollers of different specifications in the sizing gauge mechanism 5, it can be suitable for products with different diameter requirements. When replacement is needed, the two different sizing rollers can be replaced directly through the changing mechanism 6, without the need to disassemble the sizing rollers for replacement. This improves the sizing accuracy while reducing labor costs and improving production efficiency.

[0094] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention. In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be a direct connection, or it can be an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0095] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A straight seam welding machine, characterized in that: It includes a workbench, on which are respectively provided: The sizing gauge mechanism is provided with a plurality of sizing roller connecting frames, each of which is provided with a plurality of sizing rollers of different models for producing products of different diameters; The type-changing mechanism includes a driving device for driving a plurality of the sizing roller connecting frames to rotate simultaneously to switch sizing rollers of the same type to a working position; The sizing gauge mechanism further comprises: A sizing gauge fixing plate, the center of which is provided with a through hole for the workpiece to be welded to pass through; The sizing gauge fixing frames include a plurality of sizing gauge fixing frames, which are evenly distributed around the through-port along the circumference. The sizing gauge fixing frames are arranged in a triangular shape. The longitudinal cross-sectional area of ​​the sizing gauge fixing frame at one end close to the sizing gauge fixing plate is larger than the longitudinal cross-sectional area of ​​the sizing gauge fixing frame at one end away from the sizing gauge fixing plate. A plurality of spacers are arranged inside the sizing gauge fixing frame along the length direction. The roller assembly includes several groups, which are evenly distributed along the length direction and arranged on the inner side of the sizing gauge fixing frame. The roller assembly includes a first sizing roller, a second sizing roller and a rotating shaft. The first sizing roller, the second sizing roller and the rotating shaft are connected by the sizing roller connecting frame. The first sizing roller, the second sizing roller and the rotating shaft are arranged in a triangle, wherein the rotating shaft and the sizing gauge fixing frame are rotatably connected.

2. A straight seam welding machine according to claim 1, characterized in that: The type-changing mechanism comprises: A first changing plate is fixedly arranged on one side of the sizing gauge fixing frame; The second changing plate is arranged on one side of the first changing plate. A changing cylinder is fixedly arranged on one side of the second changing plate. The end of the changing cylinder passes through the second changing plate and is fixedly connected to the first changing plate. A connecting rod device, comprising a connecting rod, the connecting rod being connected to a plurality of the first sizing rollers; The driving device includes a gear and a rack. The gear is sleeved on the outside of one of the rotating shafts. The rack is fixed to one side of the sizing gauge fixing frame through a driving block. The rack and the gear are meshed. One end of the rack passes through the driving block, and the other end of the rack passes through the first changing disk and is fixedly connected between the second changing disk.

3. The straight seam welding machine according to claim 1, characterized in that: The workbench is also provided with a welding mechanism, which is correspondingly arranged above the sizing gauge mechanism, and the welding mechanism includes: A welding frame, one side of which is connected to a welding slide; The welding plate is arranged on one side of the welding frame and is slidably connected to the welding slideway; The welding cylinder is fixed on the top of the welding frame, and the end of the welding cylinder is connected to the welding plate; The welding machine is connected to one side of the welding plate and is used for welding the welding seam.

4. The straight seam welding machine according to claim 1, characterized in that: The workbench is also provided with a lifting mechanism, which includes: A jacking fixing frame is arranged below the sizing gauge fixing plate, and a jacking cylinder is arranged on the top of the jacking fixing frame; The jacking slide is arranged above the jacking fixed frame, the sizing gauge fixing plate is slidably arranged on one side of the jacking slide, and the end of the jacking cylinder and the sizing gauge fixing plate are connected.

5. The straight seam welding machine according to claim 1, characterized in that: The workbench is also provided with a feeding and seam-finding mechanism, which includes: A feed fixing frame, fixedly arranged on the top of the workbench; A seam-finding fixture is fixedly arranged on the top of the feed fixture and determines the welding seam of the workpiece to be welded through a sensor; The rotating device includes two identical groups, which are arranged side by side. Each group of rotating devices includes two rotating frames. The two rotating frames are both arranged on the top of the feed fixed frame. A rotating drum is rotatably arranged between the two rotating frames. The top surface of the rotating drum is in contact with the bottom surface of the workpiece to be welded. A rotating motor is arranged on one side of the rotating frame. The rotating motor is connected to one of the rotating drums through a transmission connection. The two rotating drums are connected through a transmission belt. The workpiece to be welded is set on the top of the rotating device and rotated by the operation of the rotating device.

6. The straight seam welding machine according to claim 5, characterized in that: The workbench is also provided with a pushing mechanism, which includes: A pusher rack is fixedly arranged on the top of the workbench, the sizing gauge mechanism is connected to one side of the pusher rack, and the feeding and seam-finding mechanism is connected to the other side of the pusher rack; A first pushing device, comprising a first pushing plate, for pushing the workpiece to be welded from the feeding and seam-finding mechanism to the pushing rack; A second pushing device, comprising a second pushing plate, for pushing the workpiece to be welded to a third pushing device; The third pushing device includes a third pushing plate, which is used to push the workpiece to be welded to the welding structure.

7. The straight seam welding machine according to claim 6, characterized in that: The first pushing device includes a first pushing slide, the first pushing plate is slidably arranged on the top of the first pushing slide, the first pushing plate is arranged in a Y shape, a first propulsion cylinder is arranged on one side of the first pushing slide, and the end of the first propulsion cylinder is fixedly connected to the first pushing plate; The second pushing device includes a pushing chain, and chain wheels are respectively provided at both ends of the pushing chain. The second pushing plate is fixedly provided on the pushing chain, and the pushing chain is fixed to the top of the pushing frame through a chain fixing frame. A second pushing motor is provided on the top of the chain fixing frame, and a transmission connection is provided between the second pushing motor and one of the chain wheels; The third pushing device is arranged on one side of the second pushing device, and the third pushing device includes a third pushing motor, and the end transmission connection of the third pushing motor is provided with a screw rod, and the outer side of the screw rod is provided with a third pushing block, and the third pushing block and the screw rod are threadedly connected. A third pushing slide is provided above the screw rod, and the third pushing block and the third pushing slide are slidingly connected. The inner end of the third pushing plate and the third pushing block are hinged, and the outer end of the third pushing plate and the third pushing block are connected by a spring, and the third pushing plate is arranged in a triangular shape.

8. The straight seam welding machine according to claim 6, characterized in that: The pusher is also provided with a guide mechanism, which includes two groups. Both groups of guide mechanisms are provided on the inner side of the pusher frame. The guide mechanism includes: A guide slide is fixedly arranged on the inner side of the pusher frame, and a guide slide plate is slidably arranged on the guide slide; The guide oil cylinder is arranged below the guide slideway, the guide oil cylinder is fixedly connected to the pusher rack, and the end of the guide oil cylinder is connected to the guide slide plate; The movable plate is connected to one side of the guide slide plate, the movable plate is arranged in an arc shape, and a plurality of guide blocks are arranged on the movable plate; The guide columns include several guide columns and guide blocks which are arranged in a one-to-one correspondence. The guide columns and guide blocks are connected by clamping blocks. The inner side surfaces of the guide columns are in contact with the outer side surfaces of the workpieces to be welded, thereby guiding the movement of the workpieces to be welded.

9. The straight seam welding machine according to claim 8, characterized in that: The guide mechanism also includes a limit plate, which is arranged on the inner side of the movable plate, and is fixedly connected to the pusher frame. The limit plate is arranged in an arc shape, and a plurality of limit openings are provided on the limit plate. The movable plate is provided with a plurality of movable slideways, the guide block is slidably connected to the movable slideways, and the end of the guide block is inserted into the limiting opening and slidably connected to the limiting opening; A sliding column is provided on the inner side of the movable plate, a pulley is provided on the end of the sliding column, and the pulley is connected to the side wall of the limiting plate in a rolling manner.

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