A welding device for cylinder barrel machining

Abstract

This invention relates to the field of cylinder welding technology, specifically disclosing a welding device for cylinder processing, comprising: a base, a three-jaw chuck rotating on the base, a support plate on the base, and multiple roller sets arranged on the support plate along the left-right direction; a clamping module on the support plate, the clamping module including a clamping unit and a pulling unit; the clamping unit including a sliding seat elastically slidably connected to the support plate along the left-right direction, and two support frames symmetrically arranged front-back on the sliding seat, the support frames being elastically slidably connected to the sliding seat along the front-back direction. The beneficial effects of this invention are: by simply pulling the pull rod, the two clamping rods can be quickly moved to the right, increasing the distance between the two clamping rods and making room for the cylinder head placement; after releasing the pull rod, the clamping rods quickly return to their original position to clamp and fix the cylinder head, eliminating the need for manual intervention for auxiliary positioning during welding, effectively saving manpower.

Description

Technical Field

[0001] This invention relates to the field of cylinder welding technology, and more specifically to a welding apparatus for cylinder machining. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy to perform linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device and has no transmission backlash, resulting in smooth movement. Therefore, it is used in the hydraulic systems of various machines. A hydraulic cylinder basically consists of a cylinder barrel, cylinder head, piston, piston rod, sealing device, cushioning device, and venting device.

[0003] Chinese Patent CN117862731B discloses a welding equipment for assembling and processing cylinder barrels and cylinder bottoms, including a welding table and a support assembly. A conveyor belt is provided on one side of the welding table, and support assemblies are provided on both the conveyor belt and the welding table. The support assembly on the conveyor belt is used for transporting and loading cylinder barrels, while the support assembly on the welding table is used for loading and unloading cylinder barrels. The support assembly not only effectively completes the transport and loading of cylinder barrels, but also, compared with the manual transport and loading methods in the prior art, this patent only requires workers to place the cylinder barrels between the corresponding support rollers, and the subsequent transport and loading can be completed by the conveyor belt and the support assembly, thus effectively saving manpower. Furthermore, the support assembly can also perform corresponding reciprocating motion under the movement of the conveyor belt, thereby improving the assembly and welding efficiency of cylinder barrels to a certain extent.

[0004] When welding existing cylinders, the cylinder must first be fixed on a three-jaw chuck, and then the cylinder head is placed at the end of the cylinder. This requires manual assistance. The upper part of the cylinder head and cylinder is first spot welded together. After the cylinder head and cylinder are welded together, the cylinder is rotated to complete the welding of the outer circumference gap between the cylinder head and cylinder. This method cannot quickly and effectively assist in positioning the cylinder head. This method not only increases the labor of workers, but also reduces work efficiency. Summary of the Invention

[0005] This invention provides a welding device for cylinder barrel processing, aiming to solve the technical problem that existing cylinder barrel welding methods require first fixing the cylinder barrel on a three-jaw chuck, and then placing the cylinder head at the end of the cylinder barrel. This requires manual assistance, first spot welding the upper part of the cylinder head and cylinder barrel, and then rotating the cylinder barrel after the cylinder head and cylinder barrel are welded together to complete the welding of the outer peripheral gap between the cylinder head and cylinder barrel. This method cannot quickly and effectively assist in positioning the cylinder head, which not only increases the labor of workers but also reduces work efficiency.

[0006] A welding apparatus for cylinder barrel processing according to the present invention includes: a base, a three-jaw chuck rotating on the base, a bearing plate on the base, and a plurality of roller sets arranged on the bearing plate along the left-right direction; a clamping module on the bearing plate, the clamping module including a clamping unit and a pulling unit; the clamping unit includes a sliding seat elastically slidably connected to the bearing plate along the left-right direction, two support frames symmetrically arranged front and rear on the sliding seat, the support frames elastically slidably connected to the sliding seat along the front-rear direction, and each support frame is provided with a clamping rod; the pulling unit includes a clamping unit elastically slidably connected to the bearing plate along the left-right direction. A pull rod is slidably connected to the sliding seat. Two first connecting rods are symmetrically arranged front and back on the pull rod along the vertical axis. A push block is provided at the end of the first connecting rod away from the pull rod. Guide frames are provided on the front and rear sides of the sliding seat corresponding to the support frame. Guide slots with a length arranged in the front and rear direction are opened on the guide frames. The two push blocks are inserted into the corresponding guide slots respectively. The push blocks are in a stop fit with the slot wall of the guide slot. When the pull rod slides, it can drive the push blocks to slide along the guide slots. The push blocks push the support frame to slide, so that the two clamping rods move away from each other.

[0007] Beneficial effects: Pulling the pull ring to the right causes the pull rod and guide rod to slide horizontally to the right simultaneously. The pull rod drives the two first connecting rods to rotate, gradually increasing the angle between them. The push blocks on the two first connecting rods slide forward and backward along the guide grooves, respectively. The two support frames drive the two clamping rods to move, increasing the distance between them. Continuing to pull the pull ring prevents further rightward movement because both first connecting rods are now at their limits. As the pull ring is pulled further, the sliding seat begins to slide to the right; that is, the guide post slides to the right along the through hole on the adjusting plate. The first spring is gradually compressed until the sliding seat reaches its limit position to the right. At this point, the two clamping rods not only move to the right, making room for the right end of the cylinder for cylinder head placement, but the distance between them also increases, preventing interference during cylinder head placement. Releasing the pull rod releases the elastic force of each component, causing the clamping rods to return to their original position and clamp the cylinder head to the cylinder end. Simply pulling the lever quickly moves the clamping rod to the right, increasing the distance between the two clamping rods and making room for the cylinder head. After releasing the lever, the clamping rod quickly returns to its original position to clamp and fix the cylinder head. No manual intervention is required for positioning during welding, effectively saving manpower and improving work efficiency and the practicality of the device.

[0008] Preferably, the clamping rod has a T-shaped structure, with a horizontal rod portion and a vertical rod portion. The horizontal rod portion is fixedly connected to the support frame, and the vertical rod portion is located at the end of the horizontal rod portion away from the support frame. The vertical rod portion intersects the horizontal rod portion perpendicularly, and the horizontal rod portions of the two clamping rods are arranged in a figure-eight shape.

[0009] Its effect is that the T-shaped clamping rod can be adapted to the structure of the cylinder head, and can better clamp the cylinder head.

[0010] Preferably, a second connecting rod is rotatably mounted on each of the two opposing surfaces of the support frame, and the second connecting rods are rotatably engaged with the support frame along an axis extending in the left-right direction. The ends of the two second connecting rods away from the support frame are rotatably engaged. A transmission cavity is provided inside the sliding seat. A drive gear is rotatably mounted on the right side wall of the transmission cavity. A drive component fixedly connected to the drive gear is rotatably mounted on the outside of the sliding seat. A transmission gear is rotatably mounted on the top wall of the transmission cavity. The transmission gear meshes with the drive gear. A lead screw fixedly connected to the transmission gear is rotatably mounted above the sliding seat. A push seat that slides vertically with the sliding seat is threadedly connected to the outside of the lead screw. When the lead screw rotates, it can raise and lower the push seat. The hinge point between the push seat and the two second connecting rods corresponds.

[0011] Its effect is that when welding other parts to the cylinder wall, the state of the cylinder head can be limited, thus improving practicality.

[0012] Preferably, a pull ring is fixedly provided at one end of the pull rod, and a guide rod is fixedly installed below the pull rod and arranged parallel to it. The guide rod is slidably engaged with the sliding seat, and a third spring is sleeved on the outside of the guide rod. One end of the third spring is fixed on the guide rod, and the other end is connected to the sliding seat.

[0013] Preferably, a guide post is fixedly installed on the sliding seat. The axis of the guide post is arranged horizontally in the left-right direction. A through hole is opened on the adjustment plate at the position corresponding to the guide post. The guide post passes through the through hole and slides with the adjustment plate. A first spring is provided on the guide post. One end of the first spring is connected to the guide post and the other end is connected to the adjustment plate.

[0014] Preferably, slide rods are fixedly installed on both the front and rear sides of the sliding seat, the two slide rods are coaxially arranged, and the axes of the two slide rods extend in the front-rear direction, and the support frame is slidably fitted on the slide rods.

[0015] Preferably, the roller assembly includes two rotating seats arranged at intervals, the rotating seats are fixedly mounted on the bearing plate, and rollers are rotatably mounted on the rotating seats along an axis extending in the left-right direction.

[0016] Preferably, an adjustment plate is slidably mounted on the side of the bearing plate, and a set of rollers is also provided on the adjustment plate.

[0017] Its effect is that the sliding of the adjusting plate can be adapted to cylinders of different lengths, and the roller assembly on the adjusting plate can facilitate the positioning of the cylinder head.

[0018] Preferably, the base is provided with a fixing plate, and the fixing plate is provided with multiple support columns. The support columns are telescopic structures, and the upper ends of the support columns are fixedly connected to the bearing plate.

[0019] Its effect is that the telescopic structure of the support column allows the roller assembly to be adapted to cylinders of different diameters.

[0020] Preferably, the vertical part of the clamping rod is provided with a buffer pad.

[0021] The beneficial effects of the present invention using the above technical solution are as follows: Pulling the pull ring to the right causes the pull rod and guide rod to slide horizontally to the right simultaneously. The pull rod drives the two first connecting rods to rotate, thereby gradually increasing the angle between the two first connecting rods. The push blocks on the two first connecting rods slide forward and backward along the guide grooves, respectively. The two support frames drive the two clamping rods to move, increasing the distance between the two clamping rods. Continuing to pull the pull ring, since both the front and rear first connecting rods have rotated to their limit, the pull rod cannot be pulled further to the right. As the pull ring continues to be pulled, the sliding seat begins to slide to the right; that is, the guide post slides to the right along the through hole on the adjusting plate. The first spring is gradually compressed until the sliding seat moves to its limit position to the right. At this point, the two clamping rods not only move to the right, making room for the right end of the cylinder barrel for cylinder head placement, but the distance between the two clamping rods also increases, preventing interference when placing the cylinder head. When the pull rod is released, the elastic force of each elastic element is quickly released, causing the clamping rod to return to its original position and clamp the cylinder head to the end of the cylinder. Simply pulling the pull rod on the right side quickly moves the clamping rod to the right, increasing the distance between the two clamping rods and creating space for the cylinder head. After releasing the pull rod, the clamping rod quickly returns to its original position, clamping and fixing the cylinder head in place. No manual intervention is required for positioning during welding, effectively saving manpower and improving work efficiency and the practicality of the device. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a cross-sectional view of the present invention.

[0024] Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle.

[0025] Figure 4 This is a top view of the present invention.

[0026] Figure 5 This is an exploded view of the adjusting plate and sliding seat of the present invention.

[0027] Figure 6 This is a schematic diagram of the structure of the second link of the present invention.

[0028] Figure 7 This is a top view of the sliding seat of the present invention.

[0029] Figure label:

[0030] 10. Base; 11. Base plate; 12. Three-jaw chuck; 13. Drive motor; 14. Cylinder; 15. Cylinder head; 20. Fixing plate; 21. Support column; 22. Bearing plate; 23. Rotary seat; 24. Roller; 25. Adjusting plate; 26. Slide plate; 30. Sliding seat; 31. Guide column; 32. First spring; 33. Slide rod; 34. Connecting frame; 40. Support frame; 41. Second spring; 42. Clamping rod; 50. Boss; 51. Pull rod; 52. Pull ring; 53. Guide rod; 54. Third spring; 55. First connecting rod; 56. Push block; 57. Guide frame; 58. Guide groove; 60. Second connecting rod; 61. Transmission cavity; 62. Drive gear; 63. Handle; 64. Transmission gear; 65. Lead screw; 66. Push seat. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] like Figures 1 to 7 As shown, a specific embodiment of a welding device for cylinder processing according to the present invention is presented. For ease of understanding, cylinder 14 and cylinder head 15 are taken as the application scenario of the present invention. The welding device for cylinder processing includes a drive module, a bearing module and a clamping module.

[0033] The bearing module is used to support the cylinder 14. During operation, the cylinder 14 is placed on the bearing module, the drive module is used to drive the cylinder 14 to rotate, and the clamping module is used to clamp the cylinder head 15 at the end of the cylinder 14.

[0034] like Figure 1 and Figure 2 As shown, the drive module includes a base 10, a base plate 11, a three-jaw chuck 12, and a drive motor 13.

[0035] The base 10 has a rectangular structure, extending vertically along its length. A base plate 11 is located near the bottom of the right side of the base 10, horizontally arranged along its length in the left-right direction. The base plate 11 is used to mount the load-bearing module. A three-jaw chuck 12 is rotatably mounted near the top of the right side of the base 10. The axis of the three-jaw chuck 12 extends horizontally. The three-jaw chuck 12 is used to clamp the cylinder 14 and simultaneously drive the cylinder 14 to rotate. It is particularly important to note that when the three-jaw chuck 12 is clamping the cylinder 14, the three-jaw chuck 12 and the cylinder 14 are coaxially arranged.

[0036] A drive motor 13 is fixedly installed on the left side of the base 10. The output end of the drive motor 13 is connected to the three-jaw chuck 12, so that the drive motor 13 can drive the three-jaw chuck 12 to rotate, thereby causing the cylinder 14 to rotate, which facilitates welding of the outer peripheral gap of the cylinder 14.

[0037] like Figure 1 , Figure 2 , Figure 4 as well as Figure 5 As shown, the load-bearing module includes a fixed plate 20, a support column 21, a load-bearing plate 22, a swivel base 23, rollers 24, an adjusting plate 25, and a sliding plate 26.

[0038] A fixing plate 20 is fixedly installed on a base plate 11. Multiple support columns 21 are fixedly installed on the upper surface of the fixing plate 20. The support columns 21 are arranged vertically. In this embodiment, four support columns 21 are provided on the upper surface of the fixing plate 20, and the four support columns 21 are located at the four corners of the fixing plate 20. A bearing plate 22 is fixedly installed on the upper end of the four support columns 21. The bearing plate 22 is arranged horizontally, and multiple roller groups are spaced apart along the left-right direction on the upper surface of the bearing plate 22. Each roller group includes a rotating seat 23 fixedly installed at intervals on the upper surface of the bearing plate 22. Rollers 24 are rotatably installed on the rotating seat 23, and the rollers 24 are rotatably installed on the rotating seat 23 along their axes extending in the left-right direction. When processing the cylinder 14, the cylinder 14 can be first placed horizontally on the rollers 24. The rollers 24 can support the cylinder 14 and also assist in positioning the cylinder 14 (e.g., ...). Figure 1 (As shown).

[0039] An adjusting plate 25 is horizontally slidable on the right side of the support plate 22 in the left-right direction. A sliding plate 26 is fixedly installed on the left side of the adjusting plate 25. In this embodiment, two sliding plates 26 are spaced apart. A slide rail is provided on the support plate 22 at a position corresponding to the sliding plate 26, and the sliding plate 26 is slidably engaged in the slide rail of the support plate 22. The support plate 22 is provided with a driving component (not shown in the figure) for driving the adjusting plate 25 to slide. The driving component can be a cylinder or a lead screw structure.

[0040] A roller assembly is provided on the upper surface of the adjusting plate 25, and this roller assembly is located at the right end of the cylinder barrel 14. The rollers 24 in this roller assembly are used to position the cylinder head 15. Since the cylinder head 15 consists of an end cap and a mounting part, and its end cap is circular, placing it directly on the front and rear rollers 24 helps to position the cylinder head 15, making the cylinder head 15 coaxial with the cylinder barrel 14, which facilitates the clamping module to directly clamp the cylinder head 15 onto the cylinder barrel 14. It is particularly important to note that the rollers 24 in this embodiment all have a certain width. The adjusting plate 25 can move in the left and right direction to accommodate cylinder barrels 14 of different lengths.

[0041] The bottom of the adjusting plate 25 is also provided with a support column 21. A support plate is fixedly installed at the lower end of the support column 21. The support plate slides and fits on the base plate 11 in the left and right direction, thereby supporting the adjusting plate 25 and ensuring the stability of the adjusting plate 25.

[0042] In other embodiments, the support column 21 can also be a telescopic structure, such as a cylinder, so that the height of the support plate 22 and the adjusting plate 25 can be adjusted as needed. Since the three-jaw chuck 12 cannot be adjusted, the height of the roller 24 can be adjusted to make the device suitable for cylinders 14 of different diameters.

[0043] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6 as well as Figure 7 As shown, the clamping module includes a clamping unit, a pulling unit, and a positioning unit.

[0044] The clamping unit includes a sliding seat 30, a guide post 31, a first spring 32, a slide rod 33, a connecting frame 34, a support frame 40, a second spring 41, and a clamping rod 42.

[0045] A sliding seat 30 is slidably mounted on the right side of the adjusting plate 25, and the sliding seat 30 slides horizontally in the left-right direction. A guide post 31 is fixedly mounted on the left side of the sliding seat 30, and the axis of the guide post 31 is arranged horizontally in the left-right direction. A through hole is opened on the adjusting plate 25 at a position corresponding to the guide post 31. The guide post 31 passes through the through hole and slides with the adjusting plate 25. A first spring 32 is sleeved on the outside of the guide post 31. One end of the first spring 32 is fixed on the guide post 31, and the other end is fixed on the adjusting plate 25 to provide the elastic force for the sliding seat 30 to return to its original position.

[0046] Slide rods 33 are fixedly installed on both the front and rear sides of the sliding seat 30. The two slide rods 33 are coaxially arranged, and their axes extend in the front-rear direction. A connecting frame 34 is fixed to the end of the slide rod 33 away from the sliding seat 30. The length direction of the connecting frame 34 extends in the left-right direction, and the front and rear sides of the adjusting plate 25 are provided with sliding grooves at positions corresponding to the connecting frame 34. The length direction of the sliding grooves extends in the left-right direction (e.g., ...). Figure 5 As shown, the connecting frame 34 slides with the adjusting plate 25 through a sliding groove to ensure the stable movement of the sliding seat 30. Guide frames 57 are fixedly installed on both the front and rear sides of the sliding seat 30. The guide frames 57 are located below the sliding rod 33, and the end of the guide frame 57 away from the sliding seat 30 is fixedly connected to the connecting frame 34. Each guide frame 57 has a vertically penetrating guide groove 58, and the length of the guide groove 58 extends in the front-rear direction.

[0047] Support frames 40 are slidably mounted on both the front and rear slide rods 33. A second spring 41 is also sleeved on the outside of the slide rod 33. One end of the second spring 41 is fixed to the slide rod 33, and the other end is fixed to the support frame 40 to provide the elastic force for the support frame 40 to return to its original position. In this embodiment, since the slide rod 33 has a cylindrical structure, the lower end of the support frame 40 slides horizontally with the guide frame 57 to ensure stable movement of the support frame 40.

[0048] Clamping rods 42 are fixedly installed on both the front and rear support frames 40. The clamping rods 42 have a T-shaped structure, meaning they have a horizontal rod portion and a vertical rod portion. The horizontal rod portion is fixedly connected to the support frame 40, and the end of the horizontal rod portion away from the support frame 40 has a vertical rod portion that intersects the horizontal rod portion perpendicularly. The vertical rod portion of the clamping rod 42 is equipped with a buffer pad to reduce wear on the cylinder head 15.

[0049] It should be noted that in this embodiment, the horizontal rods of the front and rear clamping rods 42 are arranged in a figure-eight shape. That is, the horizontal rod of the front clamping rod 42 gradually tilts to the left from front to back, and the horizontal rod of the rear clamping rod 42 gradually tilts to the right from front to back, forming a symmetrical structure, thereby enhancing clamping stability and making it easier to clamp the cylinder head 15 to the end of the cylinder barrel 14.

[0050] The pulling unit is used to drive the front and rear support frames 40 to move and open in opposite directions, thereby increasing the distance between the two clamping rods 42. At the same time, it can pull the sliding seat 30 to slide to the right, and then place the cylinder head 15 at the end of the cylinder barrel 14. Then, through the combined action of the first spring 32 and the second spring 41, the support frame 40 returns to its original position, and the sliding seat 30 returns to its original position to the left. The clamping rods 42 tightly clamp the cylinder head 15 at the end of the cylinder barrel 14.

[0051] like Figure 3 , Figure 5 , Figure 6 as well as Figure 7 As shown, the pulling unit includes a boss 50, a pull rod 51, a pull ring 52, a guide rod 53, a third spring 54, a first connecting rod 55, and a push block 56.

[0052] The sliding seat 30 has a boss 50 at its bottom. A pull rod 51 is horizontally slidably mounted on the boss 50, passing through the boss 50, and a pull ring 52 is fixedly mounted on the right end of the pull rod 51. A guide rod 53 is fixedly mounted below the pull rod 51, and the guide rod 53 is parallel to the pull rod 51, that is, the axis of the guide rod 53 extends in the left and right direction. One end of the guide rod 53 is fixedly connected to the left end of the pull rod 51, and the other end of the guide rod 53 passes through the boss 50 and slides with the boss 50. A third spring 54 is sleeved on the outside of the guide rod 53. One end of the third spring 54 is fixed to the guide rod 53, and the other end is fixed to the boss 50, providing the elastic force for the pull rod 51 to return to its original position.

[0053] The left end of the pull rod 51 is rotatably connected to a first connecting rod 55 at both the front and rear ends, and the two first connecting rods 55 are arranged in a V-shape. One end of the first connecting rod 55 is rotatably connected to the pull rod 51, and the first connecting rod 55 is rotatably connected to the pull rod 51 through a vertically extending axis. A push block 56 is fixedly installed at the end of the first connecting rod 55 away from the pull rod 51. The push blocks 56 on the two first connecting rods 55 respectively pass into the guide grooves 58 on the front and rear guide frames 57, and the push blocks 56 can slide horizontally back and forth in the guide grooves 58. In the initial state, both the front and rear push blocks 56 are located at the end of the guide groove 58 near the sliding seat 30. In this embodiment, the push block 56 has a cylindrical structure, so that the push block 56 can slide in the guide groove 58 and rotate around its own axis at the same time.

[0054] It is particularly important to note that in this embodiment, the elastic force of the first spring 32 is greater than that of the second spring 41 and the third spring 54; in other embodiments, the pull rod 51 can also be driven to slide by a drive structure.

[0055] When the cylinder head 15 needs to be clamped, first manually pull the pull ring 52 to the right. The pull rod 51 and the guide rod 53 slide horizontally to the right at the same time. The third spring 54 will be compressed. The pull rod 51 drives the two first connecting rods 55 to rotate, so that the angle between the two first connecting rods 55 gradually increases. The push blocks 56 on the two first connecting rods 55 slide forward and backward along the guide groove 58 respectively. That is, the push block 56 on the front pushes the support frame 40 on the front pushes it to move forward, and the push block 56 on the rear pushes the support frame 40 on the rear pushes it to move backward. The second spring 41 is gradually compressed. The two support frames 40 drive the two clamping rods 42 to move, so that the distance between the two clamping rods 42 increases.

[0056] After the two clamping rods 42 are opened to their maximum state, the pull ring 52 is pulled to the right. Since the two first connecting rods 55 are rotated to their limit state at this time, the pull rod 51 cannot be pulled to the right. As the pull ring 52 is pulled, the sliding seat 30 begins to slide to the right. That is, the guide post 31 slides to the right along the through hole on the adjusting plate 25. The first spring 32 is gradually compressed until the sliding seat 30 moves to the right to its limit position.

[0057] At this time, the two clamping rods 42 not only move to the right side, making room for the right end of the cylinder 14 to facilitate the placement of the cylinder head 15, but also increase the distance between the two clamping rods 42 to avoid interference when placing the cylinder head 15.

[0058] Then, the cylinder head 15 is placed on the roller assembly on the adjusting plate 25. The front and rear rollers 24 in the roller assembly can position the cylinder head 15, making the cylinder head 15 coaxial with the cylinder barrel 14. Then, the pull ring 52 is released, and the first spring 32 drives the sliding seat 30 to return to the left. Then, the second spring 41 and the third spring 54 drive the front and rear clamping rods 42 to clamp in the middle, finally clamping the cylinder head 15 to the end of the cylinder barrel 14. In the clamped state, the horizontal part of the clamping rod 42 is located at the angle between the end cap and the mounting part of the cylinder head 15, ensuring the stability of clamping the cylinder head 15. Then, begin welding the cylinder barrel 14 and cylinder head 15. First, weld the gap between the cylinder head 15 and the cylinder barrel 14 to fix them together. Then, the three-jaw chuck 12 drives the cylinder barrel 14 to rotate and weld all the gaps in the circumferential direction. During the rotation of the cylinder barrel 14 and cylinder head 15, the cylinder head 15 will push the clamping rod 42 to the front and rear sides respectively, and the second spring 41 will be compressed to ensure the rotation of the cylinder head 15.

[0059] After welding is completed, other components need to be welded to specific locations on the cylinder wall of cylinder 14, and the mounting portion of cylinder head 15 needs to be kept in place. Figure 1 The state shown is that the mounting part of the cylinder head 15 needs to be in a vertical state. However, the mounting part on the cylinder head 15 may be in an inclined state after being rotated. Therefore, a positioning unit is needed to limit the state of the cylinder head 15.

[0060] like Figure 3 and Figure 6 As shown, the positioning unit includes a second connecting rod 60, a drive gear 62, a handle 63, a transmission gear 64, a lead screw 65, and a pusher seat 66.

[0061] A second connecting rod 60 is rotatably mounted on the opposing surfaces of the two front and rear support frames 40, and the second connecting rod 60 is rotatably engaged with the support frame 40 along an axis extending in the left and right direction. The ends of the two second connecting rods 60 away from the support frame 40 are rotatably engaged, and the two second connecting rods 60 are also rotatably connected through an axis extending in the left and right direction.

[0062] The sliding seat 30 has a transmission cavity 61 inside. A drive gear 62 is rotatably mounted on the right side wall of the transmission cavity 61. A handle 63, which is fixedly connected to the drive gear 62, is rotatably mounted on the outside of the sliding seat 30. The drive gear 62 can be rotated by rotating the handle 63.

[0063] A transmission gear 64 is rotatably mounted on the top wall of the transmission cavity 61. The transmission gear 64 meshes with the drive gear 62. In this embodiment, both the transmission gear 64 and the drive gear 62 are bevel gears. A lead screw 65, which is fixedly connected to the transmission gear 64, is rotatably mounted above the sliding seat 30. A push seat 66 is threadedly connected to the outer side of the lead screw 65, and the push seat 66 is vertically slidingly engaged with the sliding seat 30. Thus, by rotating the handle 63, the lead screw 65 can be rotated, driving the push seat 66 to rise and fall.

[0064] It is particularly important to note that the hinge points between the pusher seat 66 and the two second connecting rods 60 correspond. When the pusher seat 66 pushes the hinge points of the two second connecting rods 60 upward, the included angle between the two second connecting rods 60 gradually decreases, thereby causing the front and rear support frames 40 to gradually approach each other. The second spring 41 is stretched, that is, the front and rear clamping rods 42 gradually approach each other. The vertical rods of the front and rear clamping rods 42 are simultaneously clamped on the front and rear sides of the mounting part of the cylinder head 15, so that the inclined mounting part is transformed into a vertical state, thus completing the fixation of the cylinder barrel 14 and the cylinder head 15, which facilitates the subsequent welding of parts onto the cylinder barrel 14.

[0065] The working principle of this invention is as follows: First, the cylinder 14 is placed horizontally on the roller 24. The roller 24 can support the cylinder 14 and also assist in positioning the cylinder 14. Then, the three-jaw chuck 12 clamps and fixes one end of the cylinder 14. When the cylinder head 15 needs to be clamped, the pull ring 52 is manually pulled to the right. The pull rod 51 and the guide rod 53 slide horizontally to the right at the same time. The third spring 54 is compressed. The pull rod 51 drives the two first connecting rods 55 to rotate, thereby gradually increasing the angle between the two first connecting rods 55. The push blocks 56 on the two first connecting rods 55 slide forward and backward along the guide groove 58, respectively. That is, the push block 56 on the front push side pushes the front support frame 40 to move forward, and the push block 56 on the rear push side pushes the rear support frame 40 to move backward. The second spring 41 is gradually compressed. The two support frames 40 drive the two clamping rods 42 to move, thereby increasing the distance between the two clamping rods 42.

[0066] After the two clamping rods 42 are opened to their maximum state, the pull ring 52 is pulled to the right. Since the two first connecting rods 55 are rotated to their limit state at this time, the pull rod 51 cannot be pulled to the right. As the pull ring 52 is pulled, the sliding seat 30 begins to slide to the right. That is, the guide post 31 slides to the right along the through hole on the adjusting plate 25. The first spring 32 is gradually compressed until the sliding seat 30 moves to the right to its limit position.

[0067] At this time, the two clamping rods 42 not only move to the right side, making room for the right end of the cylinder 14 to facilitate the placement of the cylinder head 15, but also increase the distance between the two clamping rods 42 to avoid interference when placing the cylinder head 15.

[0068] Then, the cylinder head 15 is placed on the roller assembly on the adjusting plate 25. The front and rear rollers 24 in the roller assembly can position the cylinder head 15, making the cylinder head 15 coaxial with the cylinder barrel 14. Then, the pull ring 52 is released, and the first spring 32 drives the sliding seat 30 to return to the left. Then, the second spring 41 and the third spring 54 drive the front and rear clamping rods 42 to clamp in the middle, finally clamping the cylinder head 15 to the end of the cylinder barrel 14. In the clamped state, the horizontal part of the clamping rod 42 is located at the angle between the end cap and the mounting part of the cylinder head 15, ensuring the stability of clamping the cylinder head 15. Then, begin welding the cylinder barrel 14 and cylinder head 15. First, weld the gap between the cylinder head 15 and the cylinder barrel 14 to fix them together. Then, the three-jaw chuck 12 drives the cylinder barrel 14 to rotate and weld all the gaps in the circumferential direction. During the rotation of the cylinder barrel 14 and cylinder head 15, the cylinder head 15 will push the clamping rod 42 to the front and rear sides respectively, and the second spring 41 will be compressed to ensure the rotation of the cylinder head 15.

[0069] When welding other components onto the cylinder wall of cylinder 14, and the state of cylinder head 15 needs to be defined, turn handle 63 to rotate lead screw 65, driving pusher seat 66 to rise and fall. Pusher seat 66 corresponds to the hinge point between the two second connecting rods 60. When pusher seat 66 pushes upward to the hinge point of the two second connecting rods 60, the included angle between the two second connecting rods 60 gradually decreases, causing the front and rear support frames 40 to gradually approach each other. The second spring 41 is stretched, that is, the front and rear clamping rods 42 gradually approach each other, and the vertical rods of the front and rear clamping rods 42 simultaneously clamp the front and rear sides of the mounting part of cylinder head 15. This changes the inclined mounting part to a vertical state, completing the fixation of the cylinder 14 and cylinder head 15, facilitating the subsequent welding of components onto cylinder 14.

[0070] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A welding apparatus for cylinder barrel machining, comprising: The machine base and a three-jaw chuck rotating on the machine base are characterized by a bearing plate on the machine base, and multiple roller groups arranged on the bearing plate along the left and right directions. The bearing plate is characterized by a clamping module, which includes a clamping unit and a pulling unit. The clamping unit includes a sliding seat that is elastically slidably connected to the bearing plate in the left-right direction. Two support frames are symmetrically arranged on the sliding seat in the front and back directions. The support frames are elastically slidably connected to the sliding seat in the front-back direction. Each support frame is provided with a clamping rod. The pulling unit includes a pull rod that is elastically slidably connected to the sliding seat in the left-right direction. Two first connecting rods are rotatably mounted on the pull rod along the vertical axis and arranged symmetrically in front and behind. A push block is provided at the end of the first connecting rod away from the pull rod. Guide frames are provided on the front and rear sides of the sliding seat and at corresponding positions of the support frame. Guide slots with a length arranged in the front-back direction are opened on the guide frames. The two push blocks are respectively inserted into the corresponding guide slots. The push blocks are in a stop-fitting cooperation with the slot wall of the guide slot. When the pull rod slides, it can drive the push blocks to slide along the guide slots. The push blocks push the support frame to slide, so that the two clamping rods move away from each other. Two second connecting rods are rotatably mounted on opposite surfaces of the two support frames. The second connecting rods are rotatably engaged with the support frames along axes extending in the left and right directions. The ends of the two second connecting rods away from the support frames are rotatably engaged. A transmission cavity is provided inside the sliding seat. A drive gear is rotatably mounted on the right side wall of the transmission cavity. A drive component fixedly connected to the drive gear is rotatably mounted on the outside of the sliding seat. A transmission gear is rotatably mounted on the top wall of the transmission cavity. The transmission gear meshes with the drive gear. A lead screw fixedly connected to the transmission gear is rotatably mounted above the sliding seat. A push seat that slides vertically with the sliding seat is threadedly connected to the outside of the lead screw. When the lead screw rotates, it can raise and lower the push seat. The hinge point between the push seat and the two second connecting rods corresponds to the hinge point. A pull ring is fixedly installed at one end of the pull rod, and a guide rod is fixedly installed below the pull rod and arranged parallel to it. The guide rod is slidably engaged with the sliding seat. A third spring is sleeved on the outside of the guide rod. One end of the third spring is fixed on the guide rod, and the other end is connected to the sliding seat. A guide post is fixedly installed on the sliding seat, with its axis arranged horizontally in the left-right direction. A through hole is opened on the adjusting plate at the corresponding position of the guide post. The guide post passes through the through hole and slides with the adjusting plate. A first spring is provided on the guide post, with one end of the first spring connected to the guide post and the other end connected to the adjusting plate.

2. The welding apparatus for cylinder barrel machining according to claim 1, characterized in that, The clamping rod has a T-shaped structure, with a horizontal rod and a vertical rod. The horizontal rod is fixedly connected to the support frame, and the vertical rod is located at the end of the horizontal rod away from the support frame. The vertical rod and the horizontal rod intersect perpendicularly, and the horizontal rods of the two clamping rods are arranged in a figure-eight shape.

3. A welding apparatus for cylinder barrel machining according to any one of claims 1-2, characterized in that, The sliding seat has slide rods fixedly installed on both the front and rear sides. The two slide rods are coaxially arranged, and the axes of the two slide rods extend in the front-rear direction. The support frame slides on the slide rods.

4. The welding apparatus for cylinder barrel machining according to claim 3, characterized in that, The roller assembly includes two rotating seats arranged at intervals, which are fixedly mounted on a support plate. Rollers are rotatably mounted on the rotating seats along an axis extending in the left-right direction.

5. The welding apparatus for cylinder barrel machining according to claim 4, characterized in that, An adjustment plate is slidably mounted on the side of the bearing plate, and a set of rollers is also provided on the adjustment plate.

6. The welding apparatus for cylinder barrel machining according to claim 5, characterized in that, The base is provided with a fixing plate, and the fixing plate is provided with multiple support columns. The support columns are telescopic structures, and the upper ends of the support columns are fixedly connected to the bearing plate.

7. The welding apparatus for cylinder barrel machining according to claim 2, characterized in that, The vertical part of the clamping rod is provided with a buffer pad.

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