Hydraulic cylinder welding apparatus and method

Abstract

The application provides a hydraulic cylinder welding device and a welding method, and belongs to the technical field of hydraulic cylinder welding. The hydraulic cylinder welding device comprises a fixing unit, a welding robot is arranged on one side of the fixing unit, the fixing unit is used for mounting a to-be-welded piece and can drive the to-be-welded piece to rotate, a lifting unit for supporting the to-be-welded piece is arranged on the fixing unit, and the lifting unit further comprises a mounting frame mounted on the lifting unit and a machining disc mounted on the mounting frame. The to-be-welded piece is slowly rotated, and the machining disc is arranged, a blade is arranged on the machining disc, and the machining disc is close to the to-be-welded piece when the machining disc rotates, so that the blade processes a groove on the to-be-welded piece. Since the processing angle of the blade is fixed, the precision and efficiency of the device for processing the groove are higher, and a large amount of manpower is saved.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic cylinder welding technology, specifically relating to a hydraulic cylinder welding equipment and welding method. Background Technology

[0002] The aviation equipment industry cluster needs to implement the national large aircraft strategy, strengthen the research and development and industrialization of complete engines, complete UAVs and key materials and components, improve the supporting capabilities of airframes, avionics systems and equipment, hydraulic systems, testing and inspection, promote the development of general aviation aircraft such as business jets and light sport aircraft and special UAVs, and accelerate the cultivation of the domestic large aircraft industry chain. As the core actuator of the aircraft hydraulic system, the aviation hydraulic cylinder (usually called the actuator cylinder) involves multiple disciplines such as materials science, fluid mechanics, precision manufacturing and extreme environment adaptability. In the production of hydraulic cylinders, welding equipment is usually required to weld the cylinder barrel and cylinder base of the hydraulic cylinder, and electric arc welding is one of the most common welding methods.

[0003] Chinese Patent CN112264761B discloses a welding device for hydraulic cylinders, including a mounting base. A first mounting groove is formed on one side of the mounting base, and a clamping assembly for gripping and rotating the outer casing is provided at one end of the first mounting groove. A hollow welding head is disposed within the first mounting groove, with both ends of the welding head communicating with the outside. The welding nozzle of the welding head is vertically downward. An adjusting component for adjusting the height of the welding head is provided within the first mounting groove. A rectifier is fixed to the side wall of the mounting base, and the welding nozzle of the welding head is electrically connected to the rectifier via wires. A second mounting groove is formed on the side of the mounting base opposite to the first mounting groove, and a feeding assembly for feeding welding wire to the welding nozzle is provided within the second mounting groove. This application has the effect of improving the welding quality of hydraulic cylinders.

[0004] In the welding process of hydraulic cylinders, to avoid incomplete penetration defects caused by insufficient penetration depth in the weld joint, a welding bevel that meets the process requirements must be prefabricated at the joint before welding. However, in the current technology, most small and medium batch production or maintenance scenarios still rely on manual handheld angle grinders for beveling. This method has significant technical shortcomings: First, the processing accuracy is difficult to control. Influenced by the operator's experience, the bevel angle deviation can reach ±3°, the blunt edge size fluctuation can exceed ±0.5mm, and the root gap unevenness can exceed 2mm, which cannot meet the precise requirements of the molten pool filling space for thick-walled joints (thickness ≥20mm) of hydraulic cylinders. Second, the processing consistency is poor. The bevel shape of different workpieces in the same batch varies significantly, making it difficult to uniformly control subsequent welding parameters (such as current, voltage, and speed). First, the welding defect rate (incomplete penetration, slag inclusion, porosity) remains high. Second, the processing efficiency is low. For the annular bevel of cylinders with a diameter of φ500mm or more, manual grinding requires multiple operations, with each bevel taking more than 2 hours. Moreover, the surface roughness of the bevel after grinding reaches Ra25-50μm, requiring an additional 1-2 polishing processes. Third, the labor costs and quality risks are compounded. Not only are skilled operators required, but improper force control during grinding can easily lead to scratches on the bevel sidewalls (a stress concentration source will form when the depth exceeds 0.2mm), ultimately affecting the overall service life of the hydraulic cylinder. Summary of the Invention

[0005] The purpose of this invention is to provide a hydraulic cylinder welding equipment and welding method, which aims to solve the problem that the welding devices used for hydraulic cylinders in the prior art cannot process the bevel, and that manual processing of the bevel cannot guarantee the processing accuracy of the bevel, thereby affecting the overall life of the hydraulic cylinder.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic cylinder welding device, comprising: a fixing unit, a welding robot disposed on one side of the fixing unit, the fixing unit being used to mount the workpiece to be welded and capable of driving the workpiece to be welded to rotate, a lifting unit disposed on the fixing unit for supporting the workpiece to be welded, and further comprising a mounting frame mounted on the lifting unit and a processing disc mounted on the mounting frame, wherein:

[0007] The mounting frame includes an upright plate set on the lifting unit. The upright plate has a groove for avoiding the workpiece to be welded. The upright plate has a rotating shaft that passes through the upright plate. A swing frame is set on one side of the rotating shaft. The processing plate is installed at the top end of the swing frame. An eccentric component is set at the end of the rotating shaft away from the swing frame. A lever is set at the eccentric part of the eccentric component. A pusher is installed on the sliding component. When the pusher abuts against the lever and pushes the lever to move, the eccentric component can be rotated. At the same time, the rotating shaft drives the swing frame to bring the processing plate closer to the cylinder.

[0008] The machining disc can rotate on its own axis, and the cutting blades are mounted on the machining disc. The rotation of the machining disc can drive the cutting blades to rotate.

[0009] A further technical solution of the present invention is that the processing disc includes a disc body located at one end of the swing frame near the top, and mounting grooves are provided on both sides of the disc body. A sliding plate that slides radially along the disc body is provided on the side wall of the mounting groove, and the blade is fixedly mounted on the sliding plate.

[0010] A further technical solution of the present invention is that a shaft is rotatably arranged at the center of the disc body, and an arc-shaped plate is arranged on the shaft body inside the mounting groove. The arc-shaped plate and the shaft body are not coaxially arranged. The end of the arc-shaped plate near the shaft body is fixedly connected to the shaft body. The end of the slide plate near the shaft body is provided with a sliding groove. The arc-shaped plate slides inside the sliding groove. The disc body is also provided with a clearance groove for accommodating the arc-shaped plate.

[0011] A further technical solution of the present invention is that a third driving source is provided at the lower end of the swing frame. The third driving source drives the shaft to rotate through a transmission structure. The rotating shaft is located between the third driving source and the disc body, and is close to the third driving source.

[0012] A further technical solution of the present invention is that an arc-shaped groove is provided on the upright plate, a sliding member is slidably arranged inside the arc-shaped groove, a fan-shaped rack is provided at the bottom of the sliding member, a worm gear that meshes with the rack is provided on the upright plate, and a second driving source for driving the worm gear to rotate is also provided on one side of the upright plate.

[0013] A further technical solution of the present invention is that the end of the arc-shaped plate away from the axis is provided with a flat surface, which can support the bottom of the slide plate.

[0014] A further technical solution of the present invention is that blades are provided on both sides of the disc body and distributed inside the mounting groove. The top of the blades on both sides is provided with an inclined surface. When the rotation trajectory of the top of the blades on both sides coincides, the inclined surfaces of the blades on both sides form a V-shape. There can be multiple blades on both sides, and the blades on both sides are arranged alternately.

[0015] A further technical solution of the present invention is that a counterweight is provided at the lower semicircle of the disc body, and a wire brush is provided on the counterweight.

[0016] A further technical solution of the present invention is that multiple notches are provided at the edge of the disc body, so that the disc body forms multiple impact teeth.

[0017] A method for welding a hydraulic cylinder includes the following steps:

[0018] S1. Install the workpiece to be welded on the fixed unit and support it through the lifting unit;

[0019] S2. Drive the workpiece to be welded to rotate slowly through a fixed unit;

[0020] S3. Activate the pusher to move the lever, thereby bringing the processing disc closer to the workpiece to be welded:

[0021] S4. The blade on the processing disc contacts the workpiece to be welded and rotates at a constant speed in coordination with the workpiece, thereby creating a bevel on the workpiece.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. The workpiece to be welded rotates slowly while a processing disc is set up with blades. When the processing disc rotates and approaches the workpiece, the blades process a bevel on the workpiece. Since the processing angle of the blades is fixed, this device has higher precision and efficiency in beveling compared to manual grinding, and also saves a lot of manpower.

[0024] 2. After welding one layer, the plate will repeatedly tap the weld to clean the weld slag and avoid affecting the quality of the next layer of welding. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0026] Figure 1 This is a schematic diagram of a specific embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the lifting unit in a specific embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the mounting bracket in a specific embodiment of the present invention;

[0029] Figure 4 This is a schematic diagram of the swing structure in a specific embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the processing disk structure in a specific embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the shaft mounting structure in a specific embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the installation structure of the counterweight block in a specific embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the shaft structure in a specific embodiment of the present invention;

[0034] Figure 9This is an isometric sectional view of the fixed unit in a specific embodiment of the present invention.

[0035] In the diagram: 1. Welding robot; 2. Fixed unit; 21. Chassis; 22. Mounting base; 23. Lead screw; 24. First drive source; 25. Chuck; 3. Lifting unit; 31. Lifting frame; 32. Adjusting wheel; 33. Support hole; 34. Support frame; 4. Mounting frame; 41. Vertical plate; 42. Groove; 43. Arc groove; 44. Sliding component; 445. Rack; 45. Worm gear; 46. Swinging structure; 461. Rotating shaft; 462. Swinging frame; 463. Eccentric component; 464. Lever; 465. Pushing component; 5. Processing disc; 51. Disc body; 511. Mounting groove; 512. Clearance groove; 52. Blade; 53. Shaft; 531. Arc plate; 532. Plane; 54. Slide plate; 6. Third drive source; 7. Counterweight; 8. Wire brush. Detailed Implementation

[0036] 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.

[0037] Please see Figures 1-9 The present invention provides the following technical solution: a hydraulic cylinder welding equipment, comprising a welding robot 1, a fixing unit 2, a lifting unit 3, a mounting frame 4, and a processing plate 5;

[0038] Both the welding robot 1 and the fixing unit 2 are placed on the ground. The fixing unit 2 is used to fix the cylinder barrel and the cylinder base, and the two are coaxially arranged. At the same time, the fixing unit 2 can also drive the cylinder barrel and the cylinder base to rotate synchronously. The lifting unit 3 is located at the bottom of the cylinder barrel and is used to support the cylinder barrel. The mounting bracket 4 is installed on the lifting unit 3 and is used to install the processing plate 5. The processing plate 5 corresponds to the joint between the cylinder barrel and the cylinder base. When the processing plate 5 rotates, in conjunction with the synchronous rotation of the cylinder barrel and the cylinder base, a bevel can be processed at the cylinder barrel and the cylinder base to facilitate the welding of the cylinder. The welding robot 1 is located on one side of the fixing unit 2 and can weld the cylinder and the cylinder base when the cylinder barrel rotates.

[0039] The welding robot 1 is a very mature technology in this field, and its specific structure and working principle will not be described in detail here.

[0040] Please see Figure 1 and Figure 9The fixing unit 2 includes a chassis 21, on which two mounting seats 22 are provided. One of the two mounting seats 22 is fixed to the chassis 21, and the other slides on the chassis 21 along the length of the chassis 21 via a slide rail, so that the two mounting seats 22 can move closer to or further away from each other. The mounting seats 22 can be driven by a hydraulic cylinder or a screw drive. In this embodiment, a screw drive is used. Specifically, a screw 23 is threaded to the bottom of the mounting seat 22. A first drive source 24 is provided on one side of the chassis 21 to drive the screw 23 to rotate. The first drive source 24 can drive the screw 23 to rotate, so that the mounting seat 22 can slide on the chassis 21.

[0041] Each of the two mounting bases 22 has a chuck 25 on one side opposite to the other, which is used to clamp and fix the cylinder barrel and the cylinder base respectively. The two chucks 25 are coaxially arranged to ensure the coaxiality between the cylinder barrel and the cylinder base. When the two chucks 25 rotate at the same time, the cylinder barrel and the cylinder base can rotate synchronously. In addition, after the chucks 25 fix the cylinder barrel and the cylinder base respectively, they slide on the chassis 21 through the mounting base 22, so that the cylinder barrel and the cylinder base can move closer and further away from each other.

[0042] When using the fixed unit 2, the cylinder barrel and the cylinder base are first clamped and fixed by two chucks 25 respectively. Then, one of the mounting seats 22 is moved to bring the cylinder barrel and the cylinder base closer to each other. After that, the chuck 25 rotates, which can drive the cylinder barrel and the cylinder base to rotate synchronously. Then, the cylinder barrel and the cylinder base are further processed.

[0043] Please see Figure 1 and Figure 2 The lifting unit 3 includes a lifting frame 31 mounted on a chassis 21. Multiple adjustment holes 32 are provided on the chassis 21. The lifting frame 31 is fixed to the chassis 21 by bolts engaging with the adjustment holes 32. The position of the lifting frame 31 can be adjusted by switching the position of the adjustment holes 32. Two sets of support wheels 33 are provided on the lifting frame 31, located on either side of the hydraulic cylinder and abutting against the outer surface of the hydraulic cylinder for support. Each set of support wheels 33 has at least two wheels to provide a more stable support effect. The axis of the support wheels 33 is parallel to the axis of the hydraulic cylinder. When the hydraulic cylinder rotates, friction drives the support wheels 33 to rotate. A support frame 34 is provided on the lifting frame 31, and the support wheels 33 are mounted on the support frame 34 for fixing the support wheels 33.

[0044] In use, the position of the lifting frame 31 can be adjusted through the adjustment hole 32, thereby adjusting the support position of the cylinder barrel. Then, the lifting frame 31 can drive the support frame 34 and support wheel 33 to rise and fall, so that the support wheel 33 abuts against the outer surface of the cylinder barrel, thereby supporting the cylinder barrel and keeping the axis of the cylinder barrel horizontal, preventing shaking when the cylinder barrel rotates.

[0045] Please see Figures 2-4 The mounting frame 4 includes a vertical plate 41 fixed to the lifting frame 31 by screws. The top of the vertical plate 41 has an arc-shaped groove 42, the axis of which is coaxial with the rotation axis of the chuck 25. The cylinder is located inside the groove 42, with its axis also coaxial with the axis of the groove 42. An arc-shaped groove 43 is formed on the vertical plate 41, extending through both sides of the vertical plate 41 and concentrically positioned with the groove 42. A sliding member 44 slides inside the arc-shaped groove 43, and a limit structure (not shown in the figure) is provided on the sliding member 44. The over-limit structure can prevent the sliding member 44 from disengaging from the inside of the arc groove 43. A fan-shaped rack 445 is provided at the bottom of the sliding member 44, and a worm 45 that meshes with the rack 445 is provided on the upright plate 41. At the same time, a second drive source that drives the worm 45 to rotate is also provided on one side of the upright plate 41. When the second drive source drives the worm 45 to rotate, it can drive the rack 445 to move, thereby allowing the sliding member 44 to slide freely inside the arc groove 43. A swing structure 46 is provided on the sliding member 44, and the processing disk 5 is mounted on the swing structure 46. The swing structure 46 allows the processing disk 5 to move closer to or away from the cylinder.

[0046] Please see Figures 2-4The swing structure 46 includes a horizontally penetrating shaft 461 that runs through the sliding member 44. The shaft 461 can rotate freely on the sliding member 44. A swing frame 462 is provided on the side of the shaft 461 away from the support wheel 33. The processing disk 5 is installed at the top end of the swing frame 462. An eccentric member 463 is provided at the end of the shaft 461 away from the swing frame 462. A lever 464 is provided at the eccentric part of the eccentric member 463. A pusher 465 is installed on the sliding member 44. The pusher 465 is a hydraulic cylinder, and a stop plate is provided at the telescopic end of the pusher 465 to increase the contact with the lever 464. To ensure that when the pusher 465 pushes the lever 464 to rotate, the swing frame 462 can drive the processing disc 5 to contact the cylinder barrel, the lever 464 is located within the lower semicircle of the eccentric member 463. Preferably, the lever 464 is located in the fourth quadrant of the rotation plane of the eccentric member 463. The pusher 465 can extend and retract to abut against the lever 464, thereby pushing the lever 464 to move and causing the eccentric member 463 to rotate. When the eccentric member 463 rotates, it can drive the rotating shaft 461 to rotate and drive the swing frame 462 to rotate, so that the processing disc 5 is close to the cylinder barrel for processing.

[0047] Please see Figures 4-8 The processing disc 5 includes a disc body 51, which is disc-shaped and is located at one end of the swing frame 462 near the top. It can rotate on the swing frame 462. Both sides of the disc body 51 are provided with blades 52, and the top of both blades 52 is provided with a bevel. When the rotation trajectories of the tops of the two blades 52 coincide, the bevels of the two blades 52 form a V-shape. Therefore, the processing disc 5 is brought into contact with the cylinder barrel and the cylinder base by the swing structure 46. At the same time, the processing disc 5 rotates and coordinates with the synchronous rotation of the cylinder barrel and the cylinder base, so that a bevel can be processed between the cylinder barrel and the cylinder base. There can be multiple blades 52 on both sides, and the blades 52 on both sides are staggered to improve the processing efficiency of the bevel.

[0048] During the beveling process, firstly, the position of the lifting frame 31 and the clamping length of the chuck 25 on the cylinder barrel and cylinder base are adjusted so that the tips of the blades 52 on both sides are just located at the joint of the cylinder barrel and cylinder base. Then, the machining plate 5 is driven to rotate, and the swing frame 462 is driven to rotate through the swing structure 46. The swing frame 462 drives the machining plate 5 to approach the cylinder barrel and cylinder base, so that the blades 52 on the machining plate 5 can process a certain depth on the cylinder barrel and cylinder base. Then, the chuck 25 is slowly driven to rotate the cylinder barrel and cylinder base, so that an annular bevel can be processed at the joint of the cylinder barrel and cylinder base.

[0049] Both sides of the disc body 51 are provided with mounting grooves 511, the number and position of which correspond to the blade 52. A sliding plate 54 is provided on the side wall of the mounting groove 511, which slides radially along the disc body 51. The blade 52 is fixedly mounted on the sliding plate 54, so that the sliding plate 54 can drive the blade 52 to slide radially along the disc body 51. When the sliding plate 54 moves outward, it can drive the turning surface of the blade 52 to move to the outside of the disc body 51, so that the blade 52 can perform beveling operations on the cylinder barrel and cylinder base. After the beveling is completed, the sliding plate 54 can drive the blade 52 to retract into the interior of the disc body 51.

[0050] Please see Figures 5-8 To achieve the sliding effect of the skateboard 54, a shaft 53 is rotatably mounted at the center of the disc 51 via a bearing (not shown in the figure). The shaft 53 extends through both sides of the disc 51. An arc-shaped plate 531 is mounted on the shaft 53, located inside the mounting groove 511. The arc-shaped plate 531 and the shaft 53 are not coaxially aligned; that is, the distance between one end of the arc-shaped plate 531 and the shaft 53 gradually decreases from the distance between the other end to the distance between the two ends. The end of the arc-shaped plate 531 closest to the shaft 53 is fixedly connected to the shaft 53. To avoid interference between the arc-shaped plate 531 and the bearing... Two bearings can be provided, and the arc plate 531 is placed between the two bearings to reduce the friction between the shaft 53 and the disc 51. A groove is provided at the end of the slide plate 54 near the shaft 53, and the arc plate 531 slides inside the groove. A clearance groove 512 is also provided in the disc 51 to accommodate the arc plate 531. When the disc 51 and the shaft 53 rotate relative to each other, the arc plate 531 can move into the clearance groove 512. A flat surface 532 is provided at the end of the arc plate 531 away from the shaft 53. The flat surface 532 can support the bottom of the slide plate 54.

[0051] When a bevel needs to be machined, the shaft 53 rotates instantly. Due to the inertia of the disc 51, a relative rotation occurs between the disc 51 and the shaft 53, causing the slide plate 54 to slide on the arc plate 531. The slide plate 54 slides from the end of the arc plate 531 closest to the shaft 53 away from the end of the shaft 53 until the arc plate 531 abuts against one side of the mounting groove 511. At this time, the slide plate 54 is located on the plane 532, and the blade 52 on the slide plate 54 is in an extended state. At this time, the disc 51 drives the blade 52 to rotate, which can machine the bevel of the cylinder barrel and the cylinder base. Since the plane 532 can support the slide plate 54, it can prevent the blade 52 from being subjected to radial force and sliding back along the arc plate 531. After the bevel is machined, the shaft 53 instantly flips, causing the slide plate 54 to slide along the arc plate 531 to the side closer to the shaft 53, so that the blade 52 can retract into the interior of the disc 51.

[0052] Please see Figure 4A third drive source 6 is provided at the lower end of the swing frame 462. The third drive source 6 is a motor, and its output end passes through the swing frame 462 and is connected to the first sprocket. A second sprocket is provided on the shaft 53. The first sprocket and the second sprocket are connected to each other by a chain, so that the third drive source 6 can drive the shaft 53 to rotate through the sprocket structure. In addition, the rotating shaft 461 is located between the third drive source 6 and the disc 51, and is close to the third drive source 6. Multiple notches are provided on the edge of the disc 51, so that the disc 51 forms multiple impact teeth.

[0053] After the beveling is completed, the cylinder barrel and cylinder base need to be welded. Due to the large wall thickness of the cylinder barrel, multiple layers of welding are required within the beveling. If the weld slag produced after welding is not removed, it can easily affect the quality of the next layer of welding. Therefore, when the blade 52 retracts into the disc 51, the telescopic end of the pusher 465 moves away from the lever 464, causing the disc 51 to approach the beveling under the gravity of the third drive source 6. Because the disc 51 is constantly rotating, when the disc 51 just contacts the weld slag at the beveling point... This causes the disc 51 to bounce slightly. Due to the constant gravity of the third drive source 6, the disc 51 moves back towards the bevel after bouncing, causing the disc 51 to repeatedly tap the weld slag after welding, promoting the slag to fall off and avoiding the need for manual cleaning of the slag. At the same time, the repeated tapping of the disc 51 on the butt joint will cause the cylinder barrel and cylinder base to vibrate slightly. The slight vibration can break the surface tension of the bubbles in the molten pool, helping the small bubbles to float to the surface of the molten pool and escape, thereby reducing weld porosity and improving welding quality.

[0054] In addition, welding slag needs to be formed after the weld cools down. Therefore, by moving the sliding member 44, the position of the disc 51, the cylinder barrel and the cylinder base are adjusted, thereby adjusting the distance between the disc 51 and the welding gun of the welding robot 1, so that the weld has enough cooling time to form welding slag, which makes it easier to clean the welding slag.

[0055] A counterweight 7 is provided at the lower semicircle of the disc 51, and a wire brush 8 is provided on the counterweight 7. The wire brush 8 can be rotated by rotating the disc 51. The wire brush 8 can clean the bevel before welding to prevent iron filings from affecting the welding quality. On the other hand, when the disc 51 is removing welding slag, the wire brush 8 can sweep away the small pieces of welding slag that have not been cleaned, and can further clean the welding slag.

[0056] In addition, in order to generate relative rotation between the disc 51 and the shaft 53, the shaft 53 rotates instantaneously, causing the arc plate 531 to impact the mounting groove 511. Over time, this can easily cause the arc plate 531 to break and fall off. Therefore, a counterweight 7 is installed in the mounting groove 511 of the lower semicircle of the disc 51. During use, the shaft 53 rotates slowly. At this time, the rotation of the shaft 53 is controlled by the counterweight 7, so that the disc 51 does not rotate with the shaft 53. Thus, the relative rotation effect between the shaft 53 and the disc 51 can be achieved.

[0057] A method for welding a hydraulic cylinder includes the following steps:

[0058] S1. Install the workpiece to be welded on the fixed unit 2 and support it through the lifting unit 3;

[0059] S2. Drive the workpiece to be welded to rotate slowly through the fixed unit 2;

[0060] S3. Activate the pusher 465, causing it to push the lever 464 to move, thereby bringing the processing disc 5 closer to the workpiece to be welded:

[0061] S4. The blade 52 on the processing disc 5 comes into contact with the workpiece to be welded and rotates at a constant speed in coordination with the workpiece to be welded, thereby creating a bevel on the workpiece to be welded.

Claims

1. A hydraulic cylinder welding device, comprising: A fixing unit (2) is provided with a welding robot (1) on one side of the fixing unit (2). The fixing unit (2) is used to install the workpiece to be welded and can drive the workpiece to be welded to rotate. The fixing unit (2) is provided with a lifting unit (3) for supporting the workpiece to be welded. The fixing unit (2) is characterized by further including a mounting frame (4) installed on the lifting unit (3) and a processing plate (5) installed on the mounting frame (4), wherein: The mounting bracket (4) includes a vertical plate (41) mounted on the lifting unit (3). The vertical plate (41) has a groove (42) for avoiding the workpiece to be welded. An arc-shaped groove (43) is opened on the vertical plate (41). A sliding member (44) is slidably mounted inside the arc-shaped groove (43). A rotating shaft (461) is provided on the sliding member (44) and a swing frame (462) is provided on one side of the rotating shaft (461). The processing tray (5) is mounted on the swing frame (462) located at... At one end of the top, an eccentric part (463) is provided at the end of the rotating shaft (461) away from the swing frame (462). A lever (464) is provided at the eccentric part (463). A pusher (465) is installed on the sliding part (44). When the pusher (465) abuts against the lever (464) and pushes the lever (464) to move, the eccentric part (463) can rotate. At the same time, the rotating shaft (461) drives the swing frame (462) to bring the processing plate (5) closer to the cylinder. The processing disk (5) can rotate on its own axis. A blade (52) is provided on the processing disk (5). The rotation of the processing disk (5) can drive the blade (52) to rotate. The processing disc (5) includes a disc body (51) located at one end of the swing frame (462) near the top. Both sides of the disc body (51) are provided with mounting grooves (511). A sliding plate (54) that slides radially along the disc body (51) is provided on the side wall of the mounting groove (511). The blade (52) is fixedly installed on the sliding plate (54). A shaft (53) is rotatably mounted at the center of the disc (51). An arc-shaped plate (531) is mounted on the shaft (53) and located inside the mounting groove (511). The arc-shaped plate (531) is not coaxial with the shaft (53). The end of the arc-shaped plate (531) near the shaft (53) is fixedly connected to the shaft (53). A sliding groove is provided at the end of the slide plate (54) near the shaft (53). The arc-shaped plate (531) slides inside the sliding groove. An clearance groove (512) for accommodating the arc-shaped plate (531) is also provided inside the disc (51). The swing frame (462) is provided with a third drive source (6) at the lower end. The third drive source (6) drives the shaft (53) to rotate through the transmission structure. The rotating shaft (461) is located between the third drive source (6) and the disc (51) and is close to the third drive source (6). The edge of the disc (51) is provided with multiple notches, so that the disc (51) forms multiple impact teeth; When the blade (52) retracts into the interior of the disc (51), the telescopic end of the pusher (465) moves away from the lever (464), causing the disc (51) to approach the bevel under the gravity of the third drive source (6). As the disc (51) rotates continuously, it bounces slightly when it just touches the weld slag at the bevel. Since the gravity of the third drive source (6) is always present, the disc (51) moves towards the bevel again after bouncing, causing the disc (51) to repeatedly strike the weld slag after welding, promoting the slag to fall off.

2. The hydraulic cylinder welding equipment according to claim 1, characterized in that: The bottom of the sliding member (44) is provided with a fan-shaped rack (445), and the upright plate (41) is provided with a worm (45) that meshes with the rack (445). A second driving source for driving the worm (45) to rotate is also provided on one side of the upright plate (41).

3. The hydraulic cylinder welding equipment according to claim 1, characterized in that: The arc plate (531) has a flat surface (532) at one end away from the shaft (53), and the flat surface (532) can be supported on the bottom of the slide plate (54).

4. The hydraulic cylinder welding equipment according to claim 1, characterized in that: Blades (52) are provided on both sides of the disc body (51) and distributed inside the mounting groove (511). The top of the blades (52) on both sides is provided with a slope. When the rotation trajectory of the top of the blades (52) on both sides coincides, the slope of the blades (52) on both sides forms a V-shape. There can be multiple blades (52) on both sides, and the blades (52) on both sides are staggered.

5. The hydraulic cylinder welding equipment according to claim 1, characterized in that: A counterweight (7) is provided in the lower semicircular area of ​​the disc (51), and a wire brush (8) is provided on the counterweight (7).

6. A method for welding a hydraulic cylinder, characterized in that: The hydraulic cylinder welding equipment as described in claim 1 includes the following steps: S1. Install the workpiece to be welded on the fixed unit (2) and support it through the lifting unit (3); S2. Drive the workpiece to be welded to rotate slowly through the fixed unit (2); S3. Start the pusher (465), causing the pusher (465) to push the lever (464) to move, thereby moving the processing disc (5) closer to the workpiece to be welded: S4. The blade (52) on the processing disc (5) contacts the workpiece to be welded and rotates at a constant speed with the workpiece to be welded, so that a bevel can be processed on the workpiece to be welded.

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