Precision Machining Device for the Bottom of Hydraulic Cylinder

Abstract

The present invention relates to the technical field of welding equipment, specifically a precision machining device for the bottom of a hydraulic cylinder. It includes a main body, on which a bracket is fixedly arranged, and the welding head is slidably arranged on the bracket; a fixing unit one and a fixing unit two, which are respectively arranged outside the cylinder body and the earring and fix the two respectively; a sliding connecting piece, which is arranged between the fixing unit one and the fixing unit two, and both ends are respectively connected to the fixing unit one and the fixing unit two. A buckle capable of fixing the welding head and a cleaning block for cleaning the welding notch are arranged on the sliding connecting piece. In this precision machining device for the bottom of a hydraulic cylinder, a buckle and a cleaning block are arranged on the sliding connecting piece. The cleaning block can not only accurately position the position of the welding notch to facilitate the connection of the fixing unit one and the fixing unit two, but also clean the notch before and during welding, so that the entire welding process does not require multiple manual positionings, and the welding efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding equipment, and specifically to a precision machining device for the bottom of a hydraulic cylinder. Background Art

[0002] As a core conversion component, the hydraulic cylinder plays an important role in the hydraulic system by efficiently converting hydraulic energy into linear reciprocating mechanical energy. The bottom of the cylinder, as an indispensable structural part of the hydraulic cylinder, not only bears the pressure of the liquid but also undertakes the key task of firmly connecting with external mechanical equipment. Therefore, ensuring the machining accuracy and surface quality of the bottom end face of the cylinder is crucial for achieving precise welding and the stable performance of subsequent functions.

[0003] In the existing welding process for the bottom of a hydraulic cylinder, semi-automatic welding technology is widely used. In this process, welding grooves need to be ground on the corresponding end faces of the bottom of the cylinder and the earring. This treatment not only promotes the full penetration and fusion of the molten pool during welding but also improves the mechanical properties and sealing performance of the weld.

[0004] To improve welding efficiency and precision, traditional methods often first firmly install the cylinder body on the chuck, then precisely adjust the position of the earring to ensure its coaxial alignment with the bottom of the cylinder. Next, by precisely controlling the position of the welding head, its tip is accurately aligned with the welding groove to prepare for subsequent circular welding. However, there are many deficiencies in this process:

[0005] 1. Low welding efficiency: The multiple positioning and adjustment processes in the traditional welding process for the bottom of a hydraulic cylinder are time-consuming and laborious, resulting in low overall welding efficiency.

[0006] 2. Difficult to guarantee welding precision: Due to multiple manual adjustments, precision losses may be introduced due to human errors, affecting the quality of the welded joint.

[0007] The main reasons for the above problems are as follows:

[0008] 1. Great interference from human factors: During the multiple manual positioning and adjustment processes, factors such as the skill level, experience, and fatigue degree of the operator may all affect the welding precision, making it difficult to stably control the welding quality.

[0009] 2. Complex process flow: The existing welding process flow includes multiple links such as cylinder body installation, earring positioning, and welding head adjustment. The connection and coordination requirements between these links are relatively high, increasing the risk of errors and the difficulty of management.

[0010] In summary, the multiple positioning and adjustment involved in the welding process are not only time-consuming and laborious but may also introduce unnecessary precision losses due to human errors. For this reason, we propose a precision machining device for the bottom of a hydraulic cylinder. Summary of the Invention

[0011] To solve the above technical problems, an embodiment of the present application provides a precision machining device for the bottom of a hydraulic cylinder, including a main body, on which a chuck for fixing the cylinder body is provided, and further including:

[0012] Two support rollers, movably arranged on the main body, for supporting the outer side of the bottom end of the cylinder body;

[0013] A welding head, arranged on one side of the main body, a bracket is fixedly arranged on the main body, and the welding head is slidably arranged on the bracket;

[0014] A first fixing unit and a second fixing unit, respectively arranged on the outer sides of the cylinder body and the earring and respectively fixing the two;

[0015] A sliding connecting piece, arranged between the first fixing unit and the second fixing unit, and the two ends are respectively connected to the first fixing unit and the second fixing unit. A buckle capable of fixing the welding head and a cleaning block for cleaning the welding groove are arranged on the sliding connecting piece.

[0016] In some embodiments, the first fixing unit includes two mutually rotatable arc plates. A plurality of support rods are slidably arranged on both of the two arc plates. A support plate for pressing against the cylinder body is arranged at the end of the support rod. A limit plate is fixedly arranged at the other end of the support rod. A support spring is arranged on the limit plate, and the end of the support spring is fixedly connected to the arc plate;

[0017] Chute grooves are formed on both of the two arc plates. A positioning screw is slidably arranged in the chute groove. One end of the positioning screw located inside the arc plate is fixedly provided with a driving plate. The driving plate is slidably connected to the inner wall of the arc plate. A driving block is fixedly arranged on the driving plate. The end of the driving block is arc-shaped and its end face abuts against the support plate. When the driving block moves, it can drive the support plate and the support rod to move. A positioning nut is sleeved on the outer side of the positioning screw.

[0018] In some embodiments, one end of the two arc plates is rotatably connected through a rotating shaft. Fixing blocks are fixedly arranged at the other ends of the two arc plates. A locking block is rotatably arranged on any one of the fixing blocks, and an avoidance groove is formed on the other fixing block. When the two arc plates are combined, rotating the locking block so that its inner side presses against the end face of the fixing block can connect the two arc plates.

[0019] In some embodiments, the second fixing unit includes two arc-shaped rods. The two arc-shaped rods are respectively connected to two arc plates through sliding connectors. A fixing frame is fixedly arranged on the arc-shaped rod. A top plate for fixing the earring is slidably arranged on the fixing frame. A connecting rod is arranged on the top plate. A threaded sleeve is arranged at the end of the connecting rod. A moving screw rod is threadedly arranged in the threaded sleeve. The moving screw rod rotatably penetrates through the fixing frame. A connecting rod is arranged between the two moving screw rods. The connecting rod can connect the two moving screw rods to make them rotate synchronously. When they rotate synchronously, they can drive the two top plates on both sides to approach each other to clamp the earring.

[0020] In some embodiments, a through groove for the connecting rod to move is formed at the end of any one of the moving screw rods, and a connecting groove is formed at the end of the other moving screw rod. When the connecting rod is inserted into the connecting groove, the two moving screw rods can rotate synchronously.

[0021] In some embodiments, movable grooves are formed on both the arc plate and the arc-shaped rod. The sliding connector includes a sliding rod slidably arranged in the movable groove. A sliding plate is fixedly arranged on the sliding rod. A guide rod is arranged between the two sliding plates on the same side. One end of the guide rod is fixedly connected to one sliding plate, and the other end slidably penetrates through the other sliding plate. A transmission screw rod is rotatably arranged on the sliding plate located on the arc plate. A fixed seat is fixedly arranged on the other sliding plate. The transmission screw rod threadedly penetrates through the fixed seat.

[0022] In some embodiments, a mounting plate is fixedly arranged on the guide rod. The cleaning block is fixedly arranged at the end of the mounting plate.

[0023] In some embodiments, a frosted layer is arranged on the outer surface of the cleaning block.

[0024] In some embodiments, a mounting plate is also arranged on the guide rod on the other side. The buckle is fixedly arranged on the mounting plate.

[0025] In some embodiments, the cleaning block and the end of the mounting plate are detachably connected.

[0026] The present invention has at least the following beneficial effects:

[0027] 1. High-precision coaxial docking: Through the design of the first fixing unit and the second fixing unit, it can ensure high-precision coaxial docking of the cylinder block and the earring before welding. The synchronous movement mechanism of the support plate 43 and the top plate 53 ensures that the cylinder block and the earring are coaxial with the arc plate 41 and the arc-shaped rod 51 respectively during clamping. At the same time, the connection of the guide rod 64 between the arc plate 41 and the arc-shaped rod 51 further ensures the coaxiality between the two, thereby improving the accuracy and quality of welding;

[0028] 2. Stable welding process: During the welding process, the cylinder block is driven to rotate by the chuck, while the welding head 3 is fixed to the device by the buckle 7 and remains stationary, realizing the circular welding of the cylinder block and the earring. This design not only ensures the stability of the welding process but also improves the uniformity and consistency of welding;

[0029] 3. Weld slag cleaning function: The setting of the cleaning block 8 enables the real-time cleaning of the weld slag at the welding notch during the welding process, avoiding the influence of weld slag on the welding quality and further improving the welding effect. The matte layer on the outer surface of the cleaning block 8 enhances the cleaning effect and ensures the cleanliness of the welding notch. Brief Description of the Drawings

[0030] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0031] Figure 2 of the present invention Figure 1 is a schematic diagram of the structure from another perspective;

[0032] Figure 3 of the present invention Figure 1 is a schematic diagram of the partial structure;

[0033] Figure 4 of the present invention Figure 3 is a schematic diagram of the partial structure;

[0034] Figure 5 is a schematic diagram of the structure of the first fixing unit of the present invention;

[0035] Figure 6 of the present invention Figure 5 is an enlarged schematic diagram of the structure at A in the present invention;

[0036] Figure 7 is a schematic diagram of the structure of the second fixing unit of the present invention;

[0037] Figure 8 of the present invention Figure 7 is a schematic diagram of the structure at B in the present invention;

[0038] Figure 9 of the present invention Figure 4 is an explosion schematic diagram;

[0039] Figure 10 of the present invention Figure 4 is a schematic diagram of the partial structure.

[0040] In the figure: 1 - main body; 2 - support roller; 3 - welding head; 4 - fixing unit one; 41 - arc plate; 42 - support rod; 43 - support plate; 44 - limiting plate; 45 - support spring; 46 - chute; 47 - positioning screw; 48 - driving plate; 49 - driving block; 410 - positioning nut; 5 - fixing unit two; 51 - arc-shaped rod; 52 - fixing frame; 53 - top plate; 54 - threaded sleeve; 55 - moving screw; 56 - connecting rod; 57 - connecting groove; 6 - sliding connecting piece; 61 - moving groove; 62 - sliding rod; 63 - sliding plate; 64 - guiding rod; 65 - transmission lead screw; 66 - fixing seat; 7 - buckle; 8 - cleaning block; 9 - fixing block; 10 - locking block; 11 - avoiding groove; 12 - mounting plate. Specific embodiments

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] Embodiment 1

[0043] Please refer to Figures 1 - 10 , the present invention provides a technical solution: a precision machining device for the bottom of a hydraulic cylinder, including a main body 1, on which a chuck for fixing the cylinder body is provided, and further including two support rollers 2, both of which are movably arranged on the main body 1 to support the outer side of the bottom end of the cylinder body; a bracket is arranged on one side of the main body 1, and a welding head 3 is slidably arranged on the bracket. Fixing unit one 4 and fixing unit two 5 are respectively arranged on the outer sides of the cylinder body and the earring, and both can be fixed on the outer sides of the cylinder body and the earring respectively.

[0044] A sliding connecting piece 6 is arranged between the fixing unit one 4 and the fixing unit two 5, and both ends of the sliding connecting piece 6 are respectively connected to the fixing unit one 4 and the fixing unit two 5. A buckle 7 for fixing the welding head 3 and a cleaning block 8 for cleaning the welding groove are arranged on the sliding connecting piece 6.

[0045] The fixing unit one 4 includes two arc plates 41 that rotate relative to each other. A plurality of support rods 42 are slidably arranged on both arc plates 41. A support plate 43 for pressing against the cylinder body is arranged at the end of the support rod 42. A limiting plate 44 is fixedly arranged at the other end of the support rod 42. A support spring 45 is arranged on the limiting plate 44, and the end of the support spring 45 is fixedly connected to the arc plate 41. The support spring 45 can make the support plate 43 stably fit on the outer side of the cylinder body.

[0046] Chute grooves 46 are formed on both of the two arc plates 41. A positioning screw 47 is slidably arranged in the chute groove 46. One end of the positioning screw 47 located inside the arc plate 41 is fixedly provided with a driving plate 48. The driving plate 48 is slidably connected to the inner wall of the arc plate 41. A driving block 49 is fixedly provided on the driving plate 48. The end of the driving block 49 is arc-shaped and its end face abuts against the support plate 43. When the driving block 49 moves, it can drive the support plate 43 and the support rod 42 to move. A positioning nut 410 is arranged on the outer side of the positioning screw 47 with a thread sleeve 54.

[0047] When the positioning screw 47 is moved to drive the driving plate 48 to move, the driving plate 48 drives the driving block 49 to move inside the arc plate 41, so that the inner side of the driving block 49 abuts against the end face of the support plate 43, and the outer side of the driving block 49 is arc-shaped. Because the continuous movement of the driving block 49 can make the support plate 43 move towards the inner side of the arc plate 41, and then tightly clamp the cylinder body located inside the arc plate 41.

[0048] One ends of the two arc plates 41 are rotatably connected through a rotating shaft. Fixed blocks 9 are fixedly provided at the other ends of the two arc plates 41. A locking block 10 is rotatably arranged on any one of the fixed blocks 9, and an avoidance groove 11 is formed on the other fixed block 9. When the two arc plates 41 are combined, rotate the locking block 10 so that its inner side presses against the end face of the fixed block 9 to connect the two arc plates 41. The two arc plates 41 can be connected or separated, and then installed on the outer side of the cylinder body.

[0049] The fixing unit two 5 includes two arc-shaped rods 51. The two arc-shaped rods 51 are respectively connected to the two arc plates 41 through sliding connectors 6. A fixing frame 52 is fixedly provided on the arc-shaped rod 51. A top plate 53 for fixing the earring is slidably arranged on the fixing frame 52. A connecting rod is arranged on the top plate 53, and a thread sleeve 54 is arranged at the end of the connecting rod. A moving screw 55 is threadedly arranged in the thread sleeve 54. The moving screw 55 rotatably penetrates through the fixing frame 52. A connecting rod 56 is arranged between the two moving screws 55. The connecting rod 56 is hexagonal but not limited thereto. In this embodiment, the connecting rod 56 is hexagonal. The connecting rod 56 can connect the two moving screws 55 to make them rotate synchronously. When they rotate synchronously, they can drive the two top plates 53 on both sides to approach each other to clamp the earring.

[0050] A through groove for the movement of the connecting rod 56 is provided at the end of any one of the moving screws 55, and a connecting groove 57 is provided at the end of the other moving screw 55. When the connecting rod 56 is inserted into the connecting groove 57, the two moving screws 55 can rotate synchronously. When any one of the moving screws 55 is rotated, under the action of the connecting rod 56, the other moving screw 55 rotates synchronously, thereby driving the threaded sleeve 54 provided on the outer side of the moving screw 55 to move, and further driving the top plates 53 to approach each other to clamp the earring. And because the top plates 53 on both sides move synchronously, when the top plates 53 clamp the earring, the earring is located exactly in the middle of the two arc-shaped rods 51 at this time.

[0051] Moving grooves 61 are provided on both the arc plate 41 and the arc-shaped rod 51. The sliding connector 6 includes a slide bar 62 slidably disposed in the moving groove 61. The slide bar 62 is semi-circular, and a sliding plate 63 is fixedly provided on the slide bar 62. When the two arc plates 41 or the two arc-shaped rods 51 are spliced, the two ends of the slide bar 62 inside them abut against each other at this time, and any one of the two abutting slide bars 62 can drive the other to move. A guide rod 64 is provided between the two sliding plates 63 on the same side. One end of the guide rod 64 is fixedly connected to one sliding plate 63, and the other end slidably penetrates the other sliding plate 63. A transmission screw rod 65 is rotatably provided on the sliding plate 63 located on the arc plate 41, and a fixed seat 66 is fixedly provided on the other sliding plate 63. The transmission screw rod 65 threadedly penetrates the fixed seat 66. When the transmission screw rod 65 is rotated, it can drive the fixed seat 66 and the sliding plate 63 to move, thereby driving the arc-shaped rod 51 to move, and finally driving the earring to move towards the cylinder body so that the earring is butt-jointed with the end face of the cylinder body.

[0052] An installation plate 12 is fixedly provided on the guide rod 64, and the cleaning block 8 is fixedly provided at the end of the installation plate 12. The end of the installation plate 12 extends into the welding groove opening. The staff can move the sliding plate 63 to drive the guide rod 64 to move along the arc plate 41, and then drive the cleaning block 8 to rotate through the guide rod 64 to clean the welding groove opening.

[0053] A frosted layer is provided on the outer surface of the cleaning block 8 to achieve a better cleaning effect.

[0054] An installation plate 12 is also provided on the guide rod 64 on the other side, and the buckle 7 is fixedly provided on the installation plate 12. During welding, the welding head 3 is placed on the buckle 7 so that the end of the welding head 3 extends into the welding groove opening.

[0055] In summary, during welding, first install the arc plate 41 and the arc-shaped rod 51 on the outer sides of the cylinder block and the earring respectively. Since the support plate 43 and the top plate 53 move synchronously in multiple numbers when clamping the cylinder block and the earring, the coaxiality between the arc plate 41 and the cylinder block and the coaxiality between the arc-shaped rod 51 and the earring can always be ensured during clamping. Further, since the arc plate 41 and the arc-shaped rod 51 are connected by the guide rod 64, the arc plate 41 and the arc-shaped rod 51 are always coaxial. Therefore, as long as the arc plate 41 and the arc-shaped rod 51 are installed on the outer sides of the cylinder block and the earring, the coaxial setting of the cylinder block and the earring can be ensured. Then, rotate the transmission lead screw 65 to drive the arc-shaped rod 51 to move towards the position of the arc plate 41, driving the earring to gradually dock with the cylinder block, and finally realizing the coaxial docking of the earring and the cylinder block. After fixing the cylinder block and the arc plate 41, clamp the welding head 3 on the buckle 7. Since the welding head 3 is slidably arranged on the bracket, the position of the welding head 3 is locked. At this time, the chuck drives the cylinder block to rotate, and the cylinder block drives the earring to rotate synchronously with it, while the buckle 7 does not move. Therefore, circular welding of the cylinder block and the earring can be realized. And when the cylinder block and the earring rotate, the arc plate 41 and the arc-shaped rod 51 rotate accordingly. At this time, the positions of the guide rod 64 and the sliding plate 63 remain unchanged. Further, during welding, the cleaning block 8 can also play the role of cleaning welding slag.

[0056] Embodiment 2

[0057] Embodiment 2 has the same structure as the main body 1 of Embodiment 1. The difference lies in that the cleaning block 8 and the end of the mounting plate 12 are detachably connected, and can be connected by clamping or threading, so that the cleaning block 8 can be replaced, which can adapt to welding slots of different sizes, and further better clean the welding slots.

[0058] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0059] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder bottom precision machining device, comprising a main body (1), on which a chuck for fixing the cylinder body is arranged, characterized in that: Also included are: Two supporting rollers (2) are movably arranged on the main body (1) to support the outer side of the bottom end of the cylinder body; A welding head (3) is arranged on one side of the main body (1); a bracket is fixedly arranged on the main body (1), and the welding head (3) is slidably arranged on the bracket; The fixing unit 1 (4) and the fixing unit 2 (5) are respectively arranged on the outside of the cylinder body and the earring and fix the two respectively; A sliding connection member (6) is arranged between the fixing unit 1 (4) and the fixing unit 2 (5), and the two ends are respectively connected to the fixing unit 1 (4) and the fixing unit 2 (5), and the sliding connection member (6) is provided with a buckle (7) capable of fixing the welding head (3) and a cleaning block (8) for cleaning the welding notch; The fixing unit 1 (4) comprises two arc plates (41) which rotate relative to each other, a plurality of support rods (42) are slidably arranged on the two arc plates (41), a support plate (43) for pressing the cylinder body is arranged at the end of the support rod (42), a limit plate (44) is fixedly arranged at the other end of the support rod (42), a support spring (45) is arranged on the limit plate (44), and the end of the support spring (45) is fixedly connected to the arc plate (41); The two arc plates (41) are both provided with a slide groove (46), a positioning screw (47) is slidably arranged in the slide groove (46), a driving plate (48) is fixedly arranged at one end of the positioning screw (47) located in the arc plate (41), the driving plate (48) is slidably connected to the inner wall of the arc plate (41), a driving block (49) is fixedly arranged on the driving plate (48), the end of the driving block (49) is arc-shaped and its end face abuts against the support plate (43), when the driving block (49) moves, it can drive the support plate (43) and the support rod (42) to move, and a positioning nut (410) is provided on the outer threaded sleeve (54) of the positioning screw (47); The second fixing unit (5) comprises two arc-shaped rods (51), the two arc-shaped rods (51) are respectively connected to the two arc-shaped plates (41) through sliding connectors (6), a fixing frame (52) is fixedly arranged on the arc-shaped rod (51), a top plate (53) for fixing the earring is slidably arranged on the fixing frame (52), a connecting rod is arranged on the top plate (53), a threaded sleeve (54) is arranged at the end of the connecting rod, a moving screw (55) is arranged in the inner thread of the threaded sleeve (54), the moving screw (55) rotates and passes through the fixing frame (52), a connecting rod (56) is arranged between the two moving screws (55), the connecting rod (56) can connect the two moving screws (55) so that the two move synchronously rotate, and when the two move synchronously rotate, the two top plates (53) on both sides can be driven to approach each other to clamp the earring; The arc plate (41) and the arc rod (51) are both provided with a movable groove (61), the sliding connection member (6) comprises a sliding rod (62) slidably arranged in the movable groove (61), a sliding plate (63) is fixedly arranged on the sliding rod (62), a guide rod (64) is arranged between the two sliding plates (63) located on the same side, one end of the guide rod (64) is fixedly connected to one sliding plate (63), and the other end slides through the other sliding plate (63), a transmission screw (65) is rotatably arranged on the sliding plate (63) located on the arc plate (41), and a fixed seat (66) is fixedly arranged on the other sliding plate (63), and the transmission screw (65) is threadedly penetrated through the fixed seat (66).

2. The hydraulic cylinder bottom precision machining device according to claim 1, characterized in that: One end of the two arc plates (41) is rotatably connected via a rotating shaft, and the other ends of the two arc plates (41) are fixedly provided with a fixing block (9), and a locking block (10) is rotatably provided on any one of the fixing blocks (9), and an avoidance groove (11) is provided on the other fixing block (9). When the two arc plates (41) are combined, the locking block (10) is rotated so that its inner side is pressed against the end surface of the fixing block (9), so that the two arc plates (41) can be connected.

3. The hydraulic cylinder bottom precision machining device according to claim 1 is characterized in that: A through slot for the connecting rod (56) to move is formed at the end of any one of the movable screw rods (55), and a connecting slot (57) is formed at the end of the other movable screw rod (55). When the connecting rod (56) is inserted into the connecting slot (57), the two movable screw rods (55) can rotate synchronously.

4. The hydraulic cylinder bottom precision machining device according to claim 1, characterized in that: A mounting plate (12) is fixedly arranged on the guide rod (64), and the cleaning block (8) is fixedly arranged on the end of the mounting plate (12).

5. The hydraulic cylinder bottom precision machining device according to claim 1, characterized in that: The outer surface of the cleaning block (8) is provided with a frosted layer.

6. The hydraulic cylinder bottom precision machining device according to claim 4, characterized in that: A mounting plate (12) is also provided on the guide rod (64) on the other side, and the buckle (7) is fixedly provided on the mounting plate (12).

7. The hydraulic cylinder bottom precision machining device according to claim 6, characterized in that: The cleaning block (8) is detachably connected to the end of the mounting plate (12).

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