Hydraulic oil cylinder machining and welding equipment

Abstract

The invention relates to the technical field of hydraulic oil cylinder welding, and discloses hydraulic oil cylinder machining and welding equipment which comprises a workbench, a bottom plate is fixedly installed at the top of the workbench, two clamping devices are installed at the top of the bottom plate, and the two clamping devices can coaxially fix two hydraulic oil cylinders correspondingly. And the two sets of clamping devices can make the hydraulic oil cylinder rotate in the axial direction, and a welding bin is fixedly installed at the top of the workbench. The rotating speed of the hydraulic oil cylinder is gradually increased through the speed changing assembly, so that welding seams and surrounding materials can be uniformly heated, and deformation and cracks in the initial welding stage are reduced; and the welding seam of the two hydraulic oil cylinders is observed through the visual sensor, the temperature and the welding seam quality of the hydraulic oil cylinders are monitored in real time, the welding speed is dynamically adjusted according to the data, heat generated in the welding process is controlled, thermal expansion and contraction of materials are reduced, the risk of welding deformation is reduced, and the dimensional precision of a welded part is improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic cylinder welding, in particular to hydraulic cylinder processing and welding equipment. Background Art

[0002] A hydraulic press is a machine that uses liquid static pressure to transfer energy to achieve various processes. It is widely used in the processing of metals, plastics and other materials. One of its core components is the hydraulic cylinder, which is a device that generates linear motion through liquid pressure. It is widely used in engineering machinery, manufacturing equipment and industrial automation systems. In order to meet the needs of specific applications, it is often necessary to combine and connect multiple hydraulic cylinders.

[0003] For example, Chinese patent publication number CN118905547A, this invention relates to the technical field of hydraulic machine manufacturing, specifically to a rotary welding device and welding method for hydraulic machine manufacturing, including a base and a fixed seat fixedly connected to both sides of the middle of the upper end surface of the base, the two fixed seats are provided with hydraulic cylinders inside, the fixed seats are provided with a clamping assembly for fixing the hydraulic cylinder inside, the clamping assembly includes a fixed ring rotatably connected inside the fixed seat, a handle is fixedly connected between the two fixed rings, and the middle of both sides of the upper end surface of the base are provided with a support assembly for supporting the tail end of the hydraulic cylinder, the support assembly includes a support arc plate, and the middle lower end surface of the support arc plate is fixedly connected to a top column. Compared with the prior art, this application solves a series of problems in the prior art, such as the welding surface of the hydraulic cylinder will deflect when the welding device is in use, making it difficult to ensure the welding quality, thereby reducing the manufacturing quality of the hydraulic press.

[0004] The welding device realizes the welding process by rotating the fixed ring to drive the hydraulic cylinder to rotate. However, in the actual welding process, the welding speed is not constant. In the initial stage, the hydraulic cylinder is cold and a slower welding speed is required to prevent cold welding and false welding. As the welding continues, a large amount of heat will be generated, which will increase the temperature of the hydraulic cylinder. If the initial welding speed is still maintained, excessive heat input may result, resulting in defects such as welding deformation, overheating and overburning of materials, pores and slag inclusions. Therefore, it is particularly important to find and maintain the most reasonable welding speed. Summary of the invention

[0005] The object of the present invention is to provide a hydraulic cylinder processing welding device to solve at least one technical problem existing in the above-mentioned prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a hydraulic cylinder processing welding equipment, comprising a workbench, a bottom plate is fixedly installed on the top of the workbench, two groups of clamping devices are installed on the top of the bottom plate, the two groups of clamping devices can respectively fix two hydraulic cylinders coaxially, and the two groups of clamping devices can make the hydraulic cylinders rotate axially, a welding warehouse is fixedly installed on the top of the workbench, a welding device capable of welding the butt joints of the two hydraulic cylinders is installed on the top of the welding warehouse, a visual sensor is fixedly installed on the inner wall of the welding warehouse, and the visual sensor can monitor the weld between the two hydraulic cylinders;

[0007] The device also comprises a speed changing assembly, which can change the rotation speed when the clamping device drives the hydraulic cylinder to rotate, so as to adjust the welding speed.

[0008] Preferably, the clamping device comprises a mounting seat fixedly mounted on the top of the base plate, a rotatable rotating sleeve is installed through the outer wall of the mounting seat, a plurality of penetrating circular holes are opened on the outer wall of the rotating sleeve, a clamping rod is slidably mounted on the inner wall of each circular hole, and a clamping block is rotatably mounted on one end of each clamping rod close to the hydraulic cylinder;

[0009] The clamping device also includes a locking assembly for locking the position of the clamping rod.

[0010] Preferably, the locking assembly comprises a fixing ring fixedly mounted on the outer wall of the clamping rod, a locking rod is fixedly mounted on the outer wall of the fixing ring, an annular groove is formed on the outer wall of the mounting seat for the locking rod to be inserted, and the locking rod can slide in the annular groove;

[0011] The locking assembly also includes a tension spring rotatably mounted on the outer wall of the fixing ring, and one end of the tension spring is fixedly connected to the outer wall of the rotating sleeve.

[0012] Preferably, a locking groove is formed on the inner wall of the circular hole, the projection of the locking groove on the plane is L-shaped, and a protrusion that can slide in the locking groove is fixedly connected to the outer wall of the clamping rod.

[0013] Preferably, a driven gear is fixedly connected to the outer wall of the rotating sleeve, a bracket is fixedly installed on the top of the base plate, a rotatable transmission gear is installed on the outer wall of the bracket, and the transmission gear is meshed with the driven gear.

[0014] Preferably, the speed shift assembly includes a fixed seat fixedly mounted on the top of the base plate, a rotating disk that can be rotatably adjusted is installed in the fixed seat, a friction roller is rotatably installed on the top of the rotating disk, and the speed shift assembly also includes a friction wheel coaxially mounted with the transmission gear, and the friction wheel and the friction roller are frictionally transmitted.

[0015] Preferably, a laser transmitter and a laser receiver are respectively installed on both sides of the inner wall of the welding chamber.

[0016] Preferably, a sliding plate is slidably installed on the top of the base plate, a cleaning tool that can contact or separate from the hydraulic cylinder is installed on the top of the sliding plate, a collecting shell is fixedly installed on the outer wall of one side of the sliding plate, and the bottom of the collecting shell is slidably connected to the top of the base plate.

[0017] Preferably, two shielding plates are fixedly installed on the top of the base plate, the two shielding plates are respectively located at the two end openings of the welding bin, and the outer walls of the two shielding plates are provided with circular grooves for the hydraulic cylinder to pass through.

[0018] Preferably, an observation window is provided on the outer wall of the welding chamber.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention gradually increases the rotation speed of the hydraulic cylinder through a speed change component, so that the weld and surrounding materials can be heated evenly, reducing deformation and cracks caused by local overheating in the early stage of welding; in this process, the welds of the two hydraulic cylinders are observed by visual sensors, and the temperature and weld quality of the hydraulic cylinders during the welding process are monitored in real time. The welding speed is dynamically adjusted according to these data to ensure the welding quality and consistency, control the heat generated during the welding process, reduce the thermal expansion and contraction of the material, reduce the risk of welding deformation, and improve the dimensional accuracy of the welded parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the present invention;

[0022] Figure 2 A perspective view of the present invention;

[0023] Figure 3 For the present invention Figure 2 A in the enlarged view;

[0024] Figure 4 It is a partial front cross-sectional view of the present invention;

[0025] Figure 5 It is a three-dimensional exploded view of the rotating sleeve and the clamping rod in the present invention;

[0026] Figure 6 It is a right side cross-sectional view of the present invention;

[0027] Figure 7 It is a three-dimensional schematic diagram of the friction roller and the friction wheel in the present invention;

[0028] Figure 8 This is a schematic diagram of a second installation method of the clamping block in the present invention.

[0029] In the figure: 1. workbench; 2. base plate; 3. welding device; 4. hydraulic cylinder; 5. mounting seat; 6. driven gear; 7. welding chamber; 8. shielding plate; 9. rotating sleeve; 10. clamping rod; 11. locking rod; 12. clamping block; 13. fixing ring; 14. friction wheel; 15. fixing seat; 16. rotating disk; 17. round hole; 18. locking groove; 19. visual sensor; 20. laser transmitter; 21. laser receiver; 22. sliding plate; 23. cleaning tool; 24. collecting shell; 25. friction roller; 26. tension spring; 27. annular groove; 28. transmission gear; 29. ​​bracket; 30. observation window. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figures 1 to 8 The present invention provides a technical solution: a hydraulic cylinder processing welding device, comprising a workbench 1, a bottom plate 2 is fixedly installed on the top of the workbench 1, two sets of clamping devices are installed on the top of the bottom plate 2, the two sets of clamping devices can respectively fix two hydraulic cylinders 4 coaxially, and the two sets of clamping devices can make the hydraulic cylinder 4 rotate axially, a welding bin 7 is fixedly installed on the top of the workbench 1, a welding device 3 that can weld the butt joint of the two hydraulic cylinders 4 is installed on the top of the welding bin 7, a visual sensor 19 is fixedly installed on the inner wall of the welding bin 7, and the visual sensor 19 can monitor the weld between the two hydraulic cylinders 4;

[0032] It also includes a speed change component, which can change the rotation speed when the clamping device drives the hydraulic cylinder 4 to rotate, so as to adjust the welding speed.

[0033] In the process of welding the hydraulic cylinder 4, the selection of welding speed is crucial. Welding speed that is too fast will lead to cold welding or virtual welding, the weld metal is not completely fused, and the edge is uneven, affecting the welding quality. Over time, too fast a welding speed will also cause more pores and cracks to form inside the weld, further reducing the welding strength. On the other hand, too slow a welding speed will lead to excessive heat input, too high a temperature in the welding area, material expansion, deformation, more burrs and irregular edges on the weld surface, and uneven welds may cause the hydraulic cylinder 4 to not be tightly connected during installation, which not only affects the sealing performance, but may also cause safety hazards to the staff in subsequent work.

[0034] See also Figure 1When the two hydraulic cylinders 4 are about to be welded, the two hydraulic cylinders 4 are first clamped separately by the clamping device, and their welds are closely fitted. The hydraulic cylinder 4 is first driven to rotate by the clamping assembly, and its rotation speed is changed by the speed change assembly. During this process, the visual sensor 19 is used to observe whether the change in rotation speed (mainly observing the situation when the speed changes from slow to fast, and whether there is shaking during the uniform rotation process) will cause the two hydraulic cylinders 4 to vibrate, so as to prevent the welds from detaching during the subsequent welding process; when it is confirmed that the two hydraulic cylinders 4 are clamped separately, the welding device 3 is started, so that the two hydraulic cylinders 4 weld the welds during the rotation process, and the speed change assembly is used to gradually increase the rotation speed of the hydraulic cylinder 4 during this process. In the initial welding stage, the rotation speed of the hydraulic cylinder 4 is set to an initial slower rotation speed, because in the initial stage, the hydraulic cylinder 4 has not been heated, the surface is cold, and a slower welding speed is required. The degree is used to ensure the welding quality and prevent the phenomenon of cold welding or false welding due to slow welding speed. During the welding process, the hydraulic cylinder 4 will be gradually heated to make the hydraulic cylinder 4 have more heat. If the initial welding speed is maintained, the heat input will be too high, thereby causing the weld between the hydraulic cylinders 4 to expand, deform and have burrs, etc. Therefore, during the welding process, the rotation speed of the hydraulic cylinder 4 is gradually increased through the speed change component so that the weld and the surrounding materials can be heated evenly, reducing the deformation and cracks caused by local overheating in the early stage of welding; in this process, the welds of the two hydraulic cylinders 4 are observed by the visual sensor 19, and the temperature and weld quality of the hydraulic cylinder 4 during the welding process are monitored in real time, and the welding speed is dynamically adjusted according to these data to ensure the welding quality and consistency, control the heat generated during the welding process, reduce the thermal expansion and contraction of the material, reduce the risk of welding deformation, and improve the dimensional accuracy of the welded parts.

[0035] Furthermore, the clamping device includes a mounting seat 5 fixedly mounted on the top of the base plate 2, a rotatable rotating sleeve 9 is installed through the outer wall of the mounting seat 5, a plurality of penetrating circular holes 17 are opened on the outer wall of the rotating sleeve 9, a clamping rod 10 is slidably mounted on the inner wall of each circular hole 17, and a clamping block 12 is rotatably mounted on one end of each clamping rod 10 close to the hydraulic cylinder 4;

[0036] The clamping device further comprises a locking assembly for locking the position of the clamping rod 10 .

[0037] See also Figure 2 , Figure 3 as well as Figure 4When the hydraulic cylinder 4 is to be clamped, the hydraulic cylinder 4 is first horizontally passed through the driven gear 6, and the staff moves each clamping rod 10 in the direction close to the hydraulic cylinder 4, thereby driving the clamping block 12 to clamp the hydraulic cylinder 4. When the clamping block 12 is tightly fitted with the hydraulic cylinder 4, the clamping rod 10 is locked by the locking assembly to prevent the hydraulic cylinder 4 from being offset during the subsequent welding process.

[0038] After the hydraulic cylinder 4 is clamped, the rotating sleeve 9 is rotated by an external driving device, thereby driving the clamping rod 10 and the clamping block 12 to rotate, so as to achieve the purpose of rotating the hydraulic cylinder 4 to facilitate subsequent welding.

[0039] Among them, it is worth mentioning that Figure 8 As shown, the clamping block 12 can also be installed in reverse, and the clamping block 12 and the hydraulic cylinder 4 are in point contact, which can be applicable to hydraulic cylinders 4 with different radii.

[0040] Furthermore, the locking assembly includes a fixing ring 13 fixedly mounted on the outer wall of the clamping rod 10, a locking rod 11 is fixedly mounted on the outer wall of the fixing ring 13, an annular groove 27 is formed on the outer wall of the mounting seat 5 so that the locking rod 11 can be inserted, and the locking rod 11 can slide in the annular groove 27;

[0041] The locking assembly further includes a tension spring 26 rotatably mounted on the outer wall of the fixing ring 13 , and one end of the tension spring 26 is fixedly connected to the outer wall of the rotating sleeve 9 .

[0042] See also Figure 4 When the hydraulic cylinder 4 is about to be clamped, the staff presses the clamping rod 10 down until the clamping block 12 is tightly fitted with the hydraulic cylinder 4. At this time, the locking rod 11 is driven to rotate by rotating the fixing ring 13, and then the locking rod 11 is inserted into the annular groove 27 to complete the locking of the hydraulic cylinder 4 in the vertical direction to prevent the hydraulic cylinder 4 from shifting during the subsequent welding process. Lubricating oil needs to be added to the annular groove 27. The addition of lubricating oil helps to reduce friction and prevent the locking rod 11 from being separated from the annular groove 27 when the rotating sleeve 9 drives the hydraulic cylinder 4 to rotate, thereby causing the hydraulic cylinder 4 to lose control. In addition, the lubricating oil can also reduce wear, noise and heat, thereby extending the service life of mechanical parts and improving the working efficiency of equipment.

[0043] It is worth noting that after the welding of the hydraulic cylinder 4 is completed, the fixing ring 13 is rotated again to disengage the locking rod 11 from the annular groove 27. Under the action of the tension spring 26, the clamping rod 10 will move away from the hydraulic cylinder 4, thereby unlocking the hydraulic cylinder 4 so that it can be removed to complete the subsequent process.

[0044] Furthermore, a locking groove 18 is formed on the inner wall of the circular hole 17 , and the projection of the locking groove 18 on the plane is L-shaped. A protrusion that can slide in the locking groove 18 is fixedly connected to the outer wall of the clamping rod 10 .

[0045] Although not adding lubricating oil into the annular groove 27 can prevent the two from disengaging when sliding relative to each other to a certain extent, there is still a possibility of disengagement between the two. In order to further increase the stability and rationality of the device, a further locking effect is added to the above technology:

[0046] See also Figure 5 When the locking block 12 is in close contact with the hydraulic cylinder 4, the locking rod 11 is rotated, and the locking rod 11 is driven to rotate ...

[0047] Furthermore, a driven gear 6 is fixedly connected to the outer wall of the rotating sleeve 9 , a bracket 29 is fixedly installed on the top of the base plate 2 , a rotatable transmission gear 28 is installed on the outer wall of the bracket 29 , and the transmission gear 28 is meshed with the driven gear 6 .

[0048] See also Figure 2 as well as Figure 3 After the hydraulic cylinder 4 is fixed, the transmission gear 28 is rotated through the external driving structure, thereby driving the driven gear 6 to rotate. Since the driven gear 6 is fixed to the rotating sleeve 9, the rotating sleeve 9 will drive the clamping rod 10 and the clamping block 12 to rotate with it, thereby driving the hydraulic cylinder 4 to rotate.

[0049] In the initial stage before welding, the welding device 3 is not started first. The transmission gear 28 is driven to rotate through the external driving structure, so that the hydraulic cylinder 4 is idle. During the rotation of the hydraulic cylinder 4, the visual sensor 19 is used to observe whether the hydraulic cylinder 4 will vibrate and deviate. Subsequently, the speed can be gradually accelerated, and the bracket 29 is used again to observe whether the welds between the hydraulic cylinders 4 will be detached, so that the hydraulic cylinder 4 is always in a stable state during the subsequent welding process, so that its welds can always remain in close contact.

[0050] Furthermore, the speed change assembly includes a fixed seat 15 fixedly mounted on the top of the base plate 2, a rotating disk 16 that can be rotatably adjusted is installed in the fixed seat 15, a friction roller 25 is rotatably installed on the top of the rotating disk 16, and the speed change assembly also includes a friction wheel 14 coaxially mounted with the transmission gear 28, and the friction wheel 14 and the friction roller 25 are frictionally transmitted.

[0051] See also Figure 7 When the hydraulic cylinder 4 needs to be rotated after clamping, the electrode fixed on the top of the rotating disk 16 is started to drive the friction roller 25. When the friction roller 25 rotates, it will drive the friction wheel 14 to rotate, and then drive the transmission gear 28 to rotate. From the above description, it can be seen that the rotation of the transmission gear 28 will drive the driven gear 6 to rotate, so as to drive the hydraulic cylinder 4 to rotate. When the rotation speed of the hydraulic cylinder 4 is to be changed, the rotating disk 16 is driven to rotate through the external driving structure, thereby driving the friction roller 25 to rotate (in the initial state, the angle between the axis of the friction roller 25 and the projection of the axis of the friction wheel 14 is the largest). Therefore, at this time, the linear speed of the friction roller 25 relative to the friction wheel 14 is The minimum rotation speed is the slowest, that is, the rotation speed of the friction wheel 14 is the slowest. As the friction roller 25 gradually rotates, the axis of the friction roller 25 gradually becomes parallel to the axis of the friction wheel 14. At this time, the linear speed of the friction roller 25 relative to the friction wheel 14 is the largest, that is, at this time, the power brought to the friction wheel 14 by the friction roller 25 is the largest, so as to match the purpose of gradually increasing the rotation speed of the hydraulic cylinder 4 during the welding process. Through multiple tests and summaries, the welding speed is dynamically adjusted according to these data to find the speed variation law that is most suitable for welding the hydraulic cylinder 4. The most suitable speed variation law can ensure uniform welding heat input, avoid cold welding, false welding and overheating in the weld, and thus improve the welding quality. High-quality welds can improve the sealing performance and strength of the hydraulic cylinder 4, extend its service life, and by dynamically adjusting the welding speed, it can reduce welding spatter and other safety hazards caused by high temperature, protect the safety of operators, and in addition, uniform heat input can also reduce harmful smoke generated during welding.

[0052] Furthermore, a laser transmitter 20 and a laser receiver 21 are respectively installed on both sides of the inner wall of the welding chamber 7.

[0053] See also Figure 6 Since the welds between the hydraulic cylinders 4 are detected by the visual sensor 19, they must be observed manually afterwards. If there are tiny cracks in the welds between the hydraulic cylinders 4, they cannot be observed by human eyes. Therefore, a laser transmitter 20 and a laser receiver 21 are provided to detect tiny changes. The cooperation of the laser transmitter 20 and the laser receiver 21 can detect the position changes of the welds in real time and quickly identify any tiny offsets or deformations. This real-time monitoring helps to immediately discover problems and make adjustments to ensure the accuracy of the welds.

[0054] Moreover, the laser emitted by the laser transmitter 20 is tangent to the outer wall of the hydraulic cylinder 4. Thus, before welding, the hydraulic cylinder 4 can be rotated first, and the feedback received by the laser receiver 21 can reflect whether the two hydraulic cylinders 4 are in a coaxial state. The accuracy of the above-mentioned clamping device can also be further tested, thereby ensuring that the two hydraulic cylinders 4 remain in a coaxial state during the welding process, further improving the welding effect.

[0055] Furthermore, a sliding plate 22 is slidably installed on the top of the base plate 2, and a cleaning tool 23 that can contact or separate from the hydraulic cylinder 4 is installed on the top of the sliding plate 22. A collecting shell 24 is fixedly installed on the outer wall of one side of the sliding plate 22, and the bottom of the collecting shell 24 is slidably connected to the top of the base plate 2.

[0056] See also Figure 6 A sliding plate 22 is also slidably installed on the top of the bottom plate 2. It can be seen from the above embodiment that in the initial state, the welding device 3 will be closed first, and the hydraulic cylinder 4 will be idle through the cooperation of the friction wheel 14 and the friction roller 25 to observe whether it vibrates. In this process, the staff pushes the sliding plate 22 into the welding bin 7 to make the cleaning tool 23 on the top of the sliding plate 22 fit with the weld between the hydraulic cylinder 4. During the rotation of the hydraulic cylinder 4, the cleaning tool 23 will clean the weld. The cleaning tool 23 can be made of materials such as wire brushes or sanding belts. Both wire brushes and sanding belts can effectively remove oxide scale, welding slag and impurities on the surface of the weld to keep the weld clean and smooth. Grinding can remove welding slag, oxide scale and impurities on the surface of the weld to make the weld smoother, thereby improving the welding quality and strength.

[0057] When the hydraulic cylinder 4 is polished, the staff pulls the sliding plate 22 away from the hydraulic cylinder 4, so that the cleaning tool 23 is separated from the hydraulic cylinder 4. At this time, the collecting shell 24 will slide to the bottom of the hydraulic cylinder 4, and the welding slag and other waste materials generated during the welding process can be collected for subsequent cleaning.

[0058] Moreover, after the welding process is completed, the hydraulic cylinder 4 can be cleaned for a second time to prevent the burrs generated during the welding process from blocking the pores and cracks, so as to timely detect defects in the weld, such as pores, cracks and unfused areas, reduce the occurrence of welding defects, and improve the reliability of the weld.

[0059] Furthermore, two shielding plates 8 are fixedly installed on the top of the bottom plate 2. The two shielding plates 8 are respectively located at the openings at both ends of the welding chamber 7, and the outer walls of the two shielding plates 8 are provided with circular grooves for the hydraulic cylinder 4 to pass through.

[0060] During the welding process, welding spatter may occur, and the spattered welding slag may damage nearby equipment and tools. The shielding plate 8 can prevent these spatters from causing damage to the equipment and tools, thereby extending the service life of the equipment.

[0061] Furthermore, an observation window 30 is provided on the outer wall of the welding chamber 7 .

[0062] An observation window 30 is provided, through which the staff can observe the welding position to prevent accidents and handle them in time. The surface of the observation window 30 is coated with a special protective coating that can filter ultraviolet rays and infrared rays to reduce the damage of harmful radiation to the eyes.

[0063] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0064] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder processing and welding device, comprising a workbench (1), characterized in that: A base plate (2) is fixedly mounted on the top of the workbench (1), and two groups of clamping devices are mounted on the top of the base plate (2). The two groups of clamping devices can respectively fix the two hydraulic cylinders (4) coaxially, and the two groups of clamping devices can both make the hydraulic cylinders (4) rotate axially. A welding bin (7) is fixedly mounted on the top of the workbench (1), and a welding device (3) is mounted on the top of the welding bin (7) for welding the butt joints of the two hydraulic cylinders (4). A visual sensor (19) is fixedly mounted on the inner wall of the welding bin (7), and the visual sensor (19) can monitor the weld between the two hydraulic cylinders (4); It also comprises a speed changing assembly, which can change the rotation speed when the clamping device drives the hydraulic cylinder (4) to rotate, so as to adjust the welding speed.

2. The hydraulic cylinder processing and welding equipment according to claim 1 is characterized in that: The clamping device comprises a mounting seat (5) fixedly mounted on the top of the base plate (2); a rotatable rotating sleeve (9) is installed through the outer wall of the mounting seat (5); a plurality of penetrating circular holes (17) are opened on the outer wall of the rotating sleeve (9); a clamping rod (10) is slidably mounted on the inner wall of each circular hole (17); and a clamping block (12) is rotatably mounted on one end of each clamping rod (10) close to the hydraulic cylinder (4); The clamping device also includes a locking component for locking the position of the clamping rod (10).

3. The hydraulic cylinder processing and welding equipment according to claim 2 is characterized in that: The locking assembly comprises a fixing ring (13) fixedly mounted on the outer wall of the clamping rod (10), a locking rod (11) being fixedly mounted on the outer wall of the fixing ring (13), an annular groove (27) capable of inserting the locking rod (11) being formed on the outer wall of the mounting seat (5), and the locking rod (11) being capable of sliding in the annular groove (27); The locking assembly further comprises a tension spring (26) rotatably mounted on the outer wall of the fixing ring (13), one end of the tension spring (26) being fixedly connected to the outer wall of the rotating sleeve (9).

4. The hydraulic cylinder processing and welding equipment according to claim 3 is characterized in that: The inner wall of the circular hole (17) is provided with a locking groove (18), the projection of the locking groove (18) on a plane is L-shaped, and the outer wall of the clamping rod (10) is fixedly connected with a protrusion that can slide in the locking groove (18).

5. The hydraulic cylinder processing and welding equipment according to claim 4 is characterized in that: The outer wall of the rotating sleeve (9) is fixedly connected to a driven gear (6), the top of the base plate (2) is fixedly mounted with a bracket (29), the outer wall of the bracket (29) is mounted with a rotatable transmission gear (28), and the transmission gear (28) is meshed with the driven gear (6).

6. The hydraulic cylinder processing and welding equipment according to claim 5, characterized in that: The speed change assembly comprises a fixed seat (15) fixedly mounted on the top of the base plate (2), a rotating disk (16) capable of rotational adjustment being mounted in the fixed seat (15), a friction roller (25) being rotatably mounted on the top of the rotating disk (16), and the speed change assembly further comprises a friction wheel (14) coaxially mounted with the transmission gear (28), and the friction wheel (14) and the friction roller (25) are frictionally driven.

7. The hydraulic cylinder processing and welding equipment according to any one of claims 1 to 6, characterized in that: A laser transmitter (20) and a laser receiver (21) are respectively installed on both sides of the inner wall of the welding chamber (7).

8. The hydraulic cylinder processing and welding equipment according to any one of claims 1 to 6, characterized in that: A sliding plate (22) is slidably mounted on the top of the bottom plate (2), a cleaning tool (23) capable of contacting or separating with the hydraulic cylinder (4) is mounted on the top of the sliding plate (22), a collecting shell (24) is fixedly mounted on the outer wall of one side of the sliding plate (22), and the bottom of the collecting shell (24) is slidably connected to the top of the bottom plate (2).

9. The hydraulic cylinder processing and welding equipment according to any one of claims 1 to 6, characterized in that: Two shielding plates (8) are fixedly mounted on the top of the bottom plate (2), the two shielding plates (8) are respectively located at the two end openings of the welding bin (7), and the outer walls of the two shielding plates (8) are provided with circular grooves through which the hydraulic cylinder (4) can pass.

10. The hydraulic cylinder processing and welding equipment according to any one of claims 1 to 6, characterized in that: An observation window (30) is provided on the outer wall of the welding chamber (7).

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