Hydraulic cylinder welding part bottom processing device
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- 盐城市万余液压机械有限公司
- Filing Date
- 2026-06-05
- Publication Date
- 2026-07-24
Smart Images
Figure CN122442264A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the technical field of hydraulic cylinder processing, specifically to a device for processing the bottom of a hydraulic cylinder welded component. Background Technology
[0002] Hydraulic cylinders, as the core actuators in hydraulic systems, are widely used in engineering machinery, lifting and transportation, metallurgical equipment, machine tool manufacturing and other fields. The welding quality of the cylinder bottom, cylinder barrel, lugs and other accessories directly determines the overall strength, sealing performance and service life of the cylinder. The cylinder bottom is the key stress-bearing part of the cylinder.
[0003] Currently, traditional hydraulic cylinder bottom welding processing mostly adopts manual assisted clamping and simple tooling positioning methods, which have many technical defects in actual production. The workpiece positioning accuracy is poor, and the cylinder bottom matching lugs and other accessories lack standardized positioning structures. Manual placement is prone to eccentricity and offset, resulting in excessive coaxiality after welding, which affects the assembly and operation stability of the cylinder. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a hydraulic cylinder welding component bottom processing device. It has the advantages of automatically centering the cylinder bottom lug to the center position, avoiding eccentricity and offset, and ensuring that the coaxiality of the lug and the cylinder body meets the standards. It solves the problems of poor workpiece positioning accuracy, lack of standardized positioning structure for cylinder bottom accessories such as lugs, and the tendency for manual placement to cause eccentricity and offset, resulting in excessive coaxiality after welding and affecting the assembly and operation stability of the hydraulic cylinder.
[0005] To achieve the above-mentioned goal of automatically centering the cylinder bottom clevis to the center position, avoiding eccentricity and offset, and ensuring that the coaxiality of the clevis and the cylinder body welding meets the standard, the present invention provides the following technical solution: a hydraulic cylinder welding part cylinder bottom processing device, including a base plate and a connecting block, a welding robotic arm is installed on the base plate, two bases are fixedly installed on the base plate, a fixed plate is fixedly installed on the connecting block, a placement groove is opened on the upper side of the fixed plate, a through groove a is opened on the lower inner wall of the placement groove, a cross groove a is opened on the placement groove, the cross groove a communicates with the through groove a, a top plate is provided above the fixed plate, a through groove b is opened on the top plate, a cross groove b is opened on the top plate, the cross groove b communicates with the through groove b; A cylinder is installed on the base plate. A round tube is fixedly installed on the vertical groove shaft of the cylinder. A vertical rod is installed inside the round tube. Three triangular plates are fixedly installed on the vertical rod. Each triangular plate is located below the cross groove a. Two lifting drives are installed above the base plate, and each lifting drive has a support plate with two fixing straps.
[0006] Preferably, a rotary drive is fixedly installed on each of the two bases, a connecting ring is fixedly sleeved on the output shaft of each of the two rotary drives, a set of connecting bars is fixedly installed on the two connecting rings, and a movable plate is fixedly installed on the two sets of connecting bars.
[0007] Preferably, the movable plate is fixedly connected to two lifting drives, the connecting block is fixedly connected to the front end of the output shaft of the rear rotary drive of the two rotary drives, a fixed ring is fixedly installed on the output shaft of the rear rotary drive of the two rotary drives, a movable strip is fixedly installed on the fixed ring, a block is fixedly installed on the movable strip, and the block is fixedly connected to the cylinder.
[0008] Preferably, two arc-shaped plates are fixedly installed on the fixed plate, and a support plate is fixedly installed on each of the two arc-shaped plates. A connecting groove is opened on each of the two support plates, and a lifting rod is movably connected in each of the two connecting grooves.
[0009] Preferably, both lifting rods are fixedly connected to the top plate. A support bar is fixedly installed on the fixed plate, a fixed block is fixedly installed on the support bar, a threaded tube is fixedly installed on the fixed block, a screw is threadedly connected to the threaded tube, a rotating column is fixedly installed at the upper end of the screw, and the lower end of the screw is connected to the top plate through a bearing.
[0010] Preferably, a small ring is fixedly installed inside the circular tube, a limit rod is movably connected to the small ring, the limit rod is fixedly connected to the vertical rod, a pressure spring is fixedly installed at the lower end of the vertical rod, the lower end of the pressure spring is fixedly connected to the small ring, and a circular plate is fixedly installed at the lower end of the limit rod.
[0011] Preferably, two connecting pipes are fixedly installed on the lower side of the pallet, and connecting plates are fixedly installed on the two connecting pipes. Several threaded grooves are opened on the connecting plates. Mounting plates are fixedly installed on the output shafts of the two lifting drives. Several bolts are movably passed through the mounting plates, and each bolt is threadedly connected to each threaded groove.
[0012] Compared with the prior art, the present invention provides a cylinder bottom processing device for hydraulic cylinder welded parts, which has the following beneficial effects: This hydraulic cylinder welding component bottom processing device, through the fixed plate placement groove, cross groove and triangular plate clamping structure, can automatically center the cylinder bottom lug to the center position, avoid eccentricity and offset, ensure that the lug and cylinder body welding coaxiality meets the standard, and improve the assembly accuracy and service life of the cylinder.
[0013] This hydraulic cylinder welding part bottom processing device has an adjustable lifting stroke via a triangular plate, which can be adapted to lugs of different diameters; the top plate is lifted via a screw, which can be adapted to workpieces of different thicknesses. It can be compatible with various sizes of cylinder bottom welding parts without changing tooling, greatly reducing the time for changeover and debugging.
[0014] This hydraulic cylinder welding component bottom processing device can synchronously drive the cylinder body, cylinder bottom lug, and cylinder assembly to rotate through rotation. In conjunction with the welding robotic arm, it can achieve 360° full-circumference welding, resulting in uniform welds, no missed welds, and no off-center welds, thus improving welding consistency and yield.
[0015] The hydraulic cylinder welding part bottom processing device uses a pressure spring and limit rod structure inside the round tube to flexibly buffer the clamping force, which ensures firm clamping and avoids excessive rigid pressure that could damage the workpiece surface, thereby improving the workpiece integrity rate.
[0016] This hydraulic cylinder welding component bottom processing device achieves reliable cylinder body fixation through the cooperation of a support plate and a fixing belt. At the same time, the bolts, connecting plate and mounting plate form a quick-release structure, which can quickly replace the support plate according to the size of the cylinder body, improving the tooling versatility and loading and unloading efficiency.
[0017] This hydraulic cylinder welding component bottom processing device reduces manual clamping and alignment operations through automatic cylinder clamping, automatic posture adjustment via rotary drive, and collaborative operation with welding robotic arms. It is suitable for automated production lines, improving production efficiency and reducing labor intensity.
[0018] 7. The hydraulic cylinder welding component bottom processing device has multiple protective designs, such as lifting rod and connecting groove guidance, limit rod and small ring limit, and pressure spring buffer, which reduce component wear, ensure stable operation of the device, and reduce maintenance costs. Attached Figure Description
[0019] Figure 1 This is a frontal perspective view of the present invention; Figure 2 This is a three-dimensional structural diagram of the connecting block of the present invention; Figure 3 This is a three-dimensional structural diagram of the fixing disk of the present invention; Figure 4 This is a three-dimensional structural diagram of the top plate of the present invention; Figure 5 This is a three-dimensional structural diagram of the circular tube of the present invention; Figure 6 This is a three-dimensional structural diagram of the lifting drive of the present invention; Figure 7 This is a three-dimensional structural diagram of the connecting plate of the present invention.
[0020] In the diagram: 1. Base plate; 2. Cylinder; 3. Block; 4. Base; 5. Connecting bar; 6. Movable bar; 7. Rotary drive; 8. Connecting ring; 9. Fixed ring; 10. Welding robotic arm; 11. Fixing strap; 12. Support plate; 13. Lifting drive; 14. Round tube; 15. Mounting plate; 16. Movable plate; 17. Bolt; 18. Connecting plate; 19. Threaded groove; 20. Connecting pipe; 21. Fixed plate; 22. Connecting block; 23. Placement slot; 24. Cross groove a; 25. Through groove a; 26. Lifting rod; 27. Rotating column; 28. Threaded pipe; 29. Fixing block; 30. Support bar; 31. Support plate; 32. Arc plate; 33. Connecting groove; 34. Top plate; 35. Through groove b; 36. Cross groove b; 37. Screw; 38. Circular plate; 39. Small ring; 40. Limiting rod; 41. Triangular plate; 42. Vertical rod; 43. Pressure spring. Detailed Implementation
[0021] The present invention will be further described in detail below with reference to the accompanying drawings, wherein the same parts are indicated by the same reference numerals. It should be noted that the terms “front”, “rear”, “left”, “right”, “upper” and “lower”, “bottom surface” and “top surface” used in the following description refer to the directions in the drawings, and the terms “inner” and “outer” refer to the directions toward or away from the geometric center of a specific part, respectively.
[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0023] Please see Figures 1-7 The present invention provides a technical solution: a hydraulic cylinder welding part cylinder bottom processing device, embodiment one, including a base plate 1 and a connecting block 22, a welding robot arm 10 is installed on the base plate 1, two bases 4 are fixedly installed on the base plate 1, a fixed plate 21 is fixedly installed on the connecting block 22, a placement groove 23 is opened on the upper side of the fixed plate 21, a through groove a25 is opened on the lower inner wall of the placement groove 23, a cross groove a24 is opened on the placement groove 23, the cross groove a24 communicates with the through groove a25, a top plate 34 is provided above the fixed plate 21, a through groove b35 is opened on the top plate 34, a cross groove b36 is opened on the top plate 34, the cross groove b36 communicates with the through groove b35; A cylinder 2 is installed on the base plate 1. A round tube 14 is fixedly installed on the vertical groove shaft of the cylinder 2. A vertical rod 42 is installed inside the round tube 14. Three triangular plates 41 are fixedly installed on the vertical rod 42. Each triangular plate 41 is located below the cross groove a24. Two lifting drives 13 are provided above the base plate 1. The two lifting drives 13 are provided with a support plate 12. Two fixing straps 11 are installed on the support plate 12. The oil cylinder to be welded is installed on the support plate 12 using the fixing straps 11. Then the earring to be welded to the bottom of the oil cylinder is placed into the placement groove 23. Then the cylinder 2 drives the vertical rod 42 to move upward, which can drive each triangular plate 41 to move upward, thereby pressing the earring upward and fixing it in the center of the placement groove 23. At the same time, the distance of the triangular plate 41 moving upward can be controlled to adapt to earrings of different diameters. In this way, the welding robot arm 10 can perform welding processing. In Example 2, based on Example 1, a rotary drive 7 is fixedly installed on each of the two bases 4. A connecting ring 8 is fixedly sleeved on the output shaft of each of the two rotary drives 7. A set of connecting bars 5 is fixedly installed on each of the two connecting rings 8. A movable plate 16 is fixedly installed on each of the two sets of connecting bars 5. The movable plate 16 is fixedly connected to the two lifting drives 13. A connecting block 22 is fixedly connected to the front end of the output shaft of the rear rotary drive 7. A fixed ring 9 is fixedly installed on the output shaft of the rear rotary drive 7. A movable bar 6 is fixedly installed on the fixed ring 9. A block 3 is fixedly installed on the movable bar 6. The block 3 is fixedly connected to the cylinder 2. The rotary drive 7 can drive the connecting ring 8 to rotate, so the movable plate 16 can be driven to rotate back and forth through the connecting bar 5. At the same time, the cylinder 2 can be driven to rotate back and forth through the movable bar 6 and the block 3. Thus, during welding, the ear ring and the cylinder can be driven to rotate back and forth to adjust the angle, which is convenient for welding robotic arm 10 to perform welding processing. In Example 3, based on Example 2, two arc-shaped plates 32 are fixedly installed on the fixed plate 21. Support plates 31 are fixedly installed on each of the two arc-shaped plates 32. Connecting grooves 33 are opened on each of the two support plates 31. Lifting rods 26 are movably connected in each of the two connecting grooves 33. Both lifting rods 26 are fixedly connected to the top plate 34. Support bars 30 are fixedly installed on the fixed plate 21. Fixing blocks 29 are fixedly installed on the support bars 30. Threaded tubes 28 are fixedly installed on the fixing blocks 29. A screw 37 is threadedly connected inside the threaded tube 28. A rotating column 27 is fixedly installed at the upper end of the screw 37. The lower end of the screw 37 is connected to the top plate 34 through a bearing. By rotating the rotating column 27 back and forth, the screw 37 can be rotated back and forth, thereby moving the top plate 34 back and forth. This allows adjustment of the distance between the top plate 34 and the placement groove 23, making it convenient for the user to adjust according to the thickness of the earring. In Example 3, based on Example 1, a small ring 39 is fixedly installed inside the round tube 14. A limiting rod 40 is movably connected to the small ring 39. The limiting rod 40 is fixedly connected to the vertical rod 42. A pressure spring 43 is fixedly installed at the lower end of the vertical rod 42. The lower end of the pressure spring 43 is fixedly connected to the small ring 39. A round plate 38 is fixedly installed at the lower end of the limiting rod 40. Through the pressure spring 43, when the cylinder 2 drives the vertical rod 42 to move and squeeze the earring to fix it, the elasticity and toughness of the pressure spring 43 can continuously apply pressure to fix it. At the same time, the toughness of the pressure spring 43 can prevent excessive hard pressure from damaging the earring. In Example 4, based on Example 2, two connecting pipes 20 are fixedly installed on the lower side of the support plate 12, and a connecting plate 18 is fixedly installed on the two connecting pipes 20. The connecting plate 18 has several threaded grooves 19. An mounting plate 15 is fixedly installed on the output shaft of the two lifting drives 13. Several bolts 17 are movably passed through the mounting plate 15. Each bolt 17 is threadedly connected to each threaded groove 19. By removing the bolts 17, the support plate 18 can be removed, which makes it convenient for the user to replace different support plates 18 according to the size of the hydraulic cylinder.
[0024] Basic support and installation structure Base plate 1 The mounting base of the entire device is used to fix all components such as the base, cylinder, and welding robotic arm, ensuring that the equipment is installed stably and operates smoothly.
[0025] Base 4 Used for mounting and fixing rotary drives, providing support and mounting positioning for the rotary drives, and ensuring the stability of the rotary mechanism.
[0026] Connector block 22 The rear rotary drive output shaft is connected to the fixed plate to transmit rotational power, driving the fixed plate and the workpiece at the bottom of the cylinder to rotate synchronously.
[0027] Cylinder bottom / earring positioning and clamping core structure Fixed plate 21 The bearing bottom lugs provide a welding positioning reference surface and are the core carrier for workpiece centering and clamping.
[0028] Placement slot 23 Used to place the bottom lugs of the cylinder to be welded, providing initial positioning and preventing the workpiece from shifting arbitrarily.
[0029] Through slot A25 Provide an upward passage for the triangle plate, ensuring that the triangle plate can be inserted and pressed against the workpiece.
[0030] Cross groove a24 It connects with through slot a and works with a triangular plate to center the earring, ensuring that the workpiece is placed in the center.
[0031] Top plate 34 In conjunction with the fixed plate, it restricts the vertical displacement of the workpiece from top to bottom, preventing the workpiece from moving up and down during welding.
[0032] Through groove B35, cross groove B36 The grooves correspond vertically to the through groove a and the cross groove a to avoid interference with the movement of the triangular plate, while ensuring the workpiece is positioned and connected.
[0033] Automatic centering clamping power structure Cylinder 2 It provides vertical power to drive the round tube, vertical rod, and triangular plate to lift and lower as a whole, so as to automatically tighten and loosen the workpiece.
[0034] 14 round tubes It serves as a mounting housing for vertical rods, pressure springs, and limit rods, providing internal guidance and protection.
[0035] Vertical rod 42 The core connecting rod of the clamping mechanism transmits power from the cylinder to move the triangular plate up and down.
[0036] Triangle ruler 41 It extends from bottom to top into the cross groove a, presses against the bottom of the earring, automatically centers and clamps in the center, and is suitable for workpieces of different diameters.
[0037] Xiao Huan 39 Installed inside a round tube, it supports the pressure spring and the limit rod, providing a limit and guide fulcrum.
[0038] Limit rod 40 Limit the radial sway of the vertical rod to ensure vertical movement when tightened and prevent tilting.
[0039] Compression spring 43 It provides flexible clamping force to buffer rigid impacts, avoid damaging the workpiece, and maintain continuous clamping force.
[0040] Circular plate 38 Installed at the lower end of the limit rod, it is used for limiting and supporting the force to prevent the limit rod from coming off the small ring.
[0041] Height adjustment and adaptation structure Curved plate 32 The support plate provides lateral stability support for the lifting and lowering of the roof.
[0042] Support plate 31 A connecting groove is provided to offer vertical guidance for the lifting rod.
[0043] Connecting slot 33 The lifting rod is restricted to moving only up and down to ensure that the roof can be raised and lowered smoothly without tilting.
[0044] 26 lifting poles Connect the top plate and the support plate, and raise and lower synchronously with the top plate to keep the top plate level.
[0045] Support bar 30 The support block and threaded tube ensure the stability of the thread adjustment mechanism.
[0046] Fixed block 29 Install and fix the threaded tube to provide threaded support for the screw.
[0047] Threaded pipe 28 In conjunction with the screw, it enables the conversion between rotary and lifting motion.
[0048] Screw 37 The rotation causes the top plate to rise and fall, and the height of the top plate can be manually adjusted to accommodate workpieces of different thicknesses.
[0049] Rotating column 27 It allows the operator to rotate and apply force, making it convenient to adjust the screw's lifting and lowering.
[0050] Cylinder block clamping and support structure pallet 12 It supports the hydraulic cylinder body and provides a welding support surface.
[0051] Fixing strap 11 The cylinder body is secured by straps to prevent it from shaking or shifting during welding.
[0052] Lifting drive 13 Provide vertical power and adjust the height of the support plate to align and weld the cylinder block with the cylinder bottom lug.
[0053] Mounting plate 15 Connect the lifting drive output shaft to the connecting plate to transmit lifting power.
[0054] Connecting pipe 20 Connecting the tray and the connecting plate forms a stable support frame.
[0055] Connecting plate 18 For detachable connection between tray and mounting plate.
[0056] Threaded groove 19, bolt 17 It enables quick assembly and disassembly of the pallet, and allows for the replacement of different pallets according to the size of the hydraulic cylinder, thus improving versatility.
[0057] Rotary adjustment and linkage structure Rotary drive 7 It provides rotational power to drive the movable plate, fixed plate, and cylinder to rotate synchronously and adjust the welding angle.
[0058] Connecting ring 8 It is fitted onto the rotary drive output shaft to transmit torque and drive the connecting bar to rotate.
[0059] Connecting bar 5 Connect the connecting ring to the movable plate, causing the movable plate and the support plate assembly to rotate as a whole.
[0060] Activity board 16 Install a lifting drive, which rotates with the connecting bar, causing the cylinder to rotate synchronously.
[0061] Fixed ring 9 The rotating drive output shaft, fixed at the rear, drives the movable bar to rotate synchronously.
[0062] Activity bar 6 The connecting ring and the block drive the cylinder and clamping mechanism to rotate synchronously with the workpiece.
[0063] 3 squares Connect the movable bar to the cylinder to ensure that the cylinder moves in tandem with the rotating mechanism and does not interfere with the tightening action.
[0064] Welding execution structure 10 welding robotic arms It automatically performs welding operations to complete the welding process between the cylinder bottom and the cylinder body.
[0065] In use, the first step is to install the hydraulic cylinder to be welded on the support plate 12 using the fixing strap 11, and then place the earring to be welded to the bottom of the hydraulic cylinder into the placement groove 23. Then, the cylinder 2 drives the vertical rod 42 to move upward, which can drive each triangular plate 41 to move upward, thereby pressing the earring upward and fixing it in the center of the placement groove 23. At the same time, the distance of the triangular plate 41 moving upward can be controlled to adapt to earrings of different diameters, so that the welding robot arm 10 can perform welding processing.
[0066] Step 2: The rotating drive 7 can drive the connecting ring 8 to rotate, which in turn drives the movable plate 16 to rotate back and forth through the connecting bar 5. At the same time, the movable bar 6 and the block 3 can drive the cylinder 2 to rotate back and forth. In this way, the ear ring and the oil cylinder can be rotated back and forth to adjust the angle during welding, which facilitates the welding robot arm 10 to perform welding processing.
[0067] Step 3: By rotating the rotating column 27 back and forth, the screw 37 can be driven to rotate back and forth, which in turn can drive the top plate 34 to move back and forth. This allows the distance between the top plate 34 and the placement slot 23 to be adjusted, making it convenient for the user to adjust according to the thickness of the earring.
[0068] Step 4: The pressure spring 43 can continuously apply pressure to fix the earring when the cylinder 2 drives the vertical rod 42 to move and squeeze it. At the same time, the elasticity and toughness of the pressure spring 43 can prevent excessive hard pressure from damaging the earring.
[0069] Step 5: After removing bolt 17, the support plate 18 can be removed, which makes it convenient for users to replace different support plates 18 according to the size of the oil cylinder.
[0070] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A hydraulic cylinder welding component bottom processing device, comprising a base plate (1) and a connecting block (22), characterized in that: A welding robotic arm (10) is installed on the base plate (1). Two bases (4) are fixedly installed on the base plate (1). A fixed plate (21) is fixedly installed on the connecting block (22). A placement groove (23) is opened on the upper side of the fixed plate (21). A through groove a (25) is opened on the lower inner wall of the placement groove (23). A cross groove a (24) is opened on the placement groove (23). The cross groove a (24) is connected to the through groove a (25). A top plate (34) is set above the fixed plate (21). A through groove b (35) is opened on the top plate (34). A cross groove b (36) is opened on the top plate (34). The cross groove b (36) is connected to the through groove b (35). A cylinder (2) is provided on the base plate (1). A round tube (14) is fixedly installed on the vertical groove shaft of the cylinder (2). A vertical rod (42) is provided inside the round tube (14). Three triangular plates (41) are fixedly installed on the vertical rod (42). Each triangular plate (41) is located below the cross groove a (24). Two lifting drives (13) are provided above the base plate (1), and a support plate (12) is provided on the two lifting drives (13). Two fixing straps (11) are installed on the support plate (12).
2. The hydraulic cylinder welding component bottom processing device according to claim 1, characterized in that: Rotary drives (7) are fixedly installed on both bases (4), and connecting rings (8) are fixedly sleeved on the output shafts of the two rotary drives (7). A set of connecting strips (5) is fixedly installed on the two connecting rings (8), and movable plates (16) are fixedly installed on the two sets of connecting strips (5).
3. The hydraulic cylinder welding component bottom processing device according to claim 2, characterized in that: The movable plate (16) is fixedly connected to two lifting drives (13), and the connecting block (22) is fixedly connected to the front end of the output shaft of the rear rotary drive (7) of the two rotary drives (7). A fixed ring (9) is fixedly installed on the output shaft of the rear rotary drive (7) of the two rotary drives (7). A movable strip (6) is fixedly installed on the fixed ring (9). A block (3) is fixedly installed on the movable strip (6). The block (3) is fixedly connected to the cylinder (2).
4. The hydraulic cylinder welding component bottom processing device according to claim 1, characterized in that: Two arc-shaped plates (32) are fixedly installed on the fixed plate (21). Support plates (31) are fixedly installed on both arc-shaped plates (32). Connecting grooves (33) are opened on both support plates (31). Lifting rods (26) are movably connected in both connecting grooves (33).
5. The hydraulic cylinder welding component bottom processing device according to claim 4, characterized in that: Both of the lifting rods (26) are fixedly connected to the top plate (34). A support bar (30) is fixedly installed on the fixed plate (21). A fixed block (29) is fixedly installed on the support bar (30). A threaded tube (28) is fixedly installed on the fixed block (29). A screw (37) is connected to the threaded tube (28) by an internal thread. A rotating column (27) is fixedly installed at the upper end of the screw (37). The lower end of the screw (37) is connected to the top plate (34) through a bearing.
6. The hydraulic cylinder weldment bottom processing device according to claim 1, characterized in that: A small ring (39) is fixedly installed inside the circular tube (14). A limit rod (40) is movably connected to the small ring (39). The limit rod (40) is fixedly connected to the vertical rod (42). A pressure spring (43) is fixedly installed at the lower end of the vertical rod (42). The lower end of the pressure spring (43) is fixedly connected to the small ring (39). A circular plate (38) is fixedly installed at the lower end of the limit rod (40).
7. The hydraulic cylinder weldment bottom processing device according to claim 1, characterized in that: Two connecting pipes (20) are fixedly installed on the lower side of the pallet (12). A connecting plate (18) is fixedly installed on the two connecting pipes (20). Several threaded grooves (19) are opened on the connecting plate (18). An installation plate (15) is fixedly installed on the output shaft of the two lifting drives (13). Several bolts (17) are movably passed through the installation plate (15). Each bolt (17) is threadedly connected to each threaded groove (19).