Double-end adjustable fixing tool for hydraulic cylinder barrel end machining

Abstract

The application discloses a double-end adjustable fixing tool for processing of a cylinder end of a hydraulic cylinder, two radially fixed mechanisms symmetrically arranged can respectively clamp and fix two ends of the hydraulic cylinder, so that the two ends of the hydraulic cylinder can be processed, the hydraulic cylinder does not need to be disassembled and reinstalled, the two radially fixed mechanisms are respectively connected with two separate driving mechanisms, the two radially fixed mechanisms can independently move and adjust to adapt to hydraulic cylinders of different lengths, the radially fixed mechanisms are circumferentially and uniformly provided with telescopic hydraulic cylinders, the hydraulic cylinders can be clamped and fixed, and the radially fixed mechanisms can adapt to hydraulic cylinders of different diameters; a rotating fixing assembly and an axial fixing mechanism are arranged in the middle of the hydraulic cylinder, the axial fixing mechanism can limit the axial movement of the rotating fixing assembly, and then the axial movement of the hydraulic cylinder during processing can be limited, so that the processing of the two ends of the hydraulic cylinder can be stably performed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of hydraulic cylinder barrel processing equipment, in particular to a double-end adjustable fixing tool for hydraulic cylinder barrel end processing. BACKGROUND

[0002] A hydraulic cylinder is a device used to convert hydraulic energy into mechanical energy, commonly used to push or pull heavy machinery, equipment or engineering machinery, etc. One of the main components of a hydraulic cylinder is the cylinder barrel, which is the outer shell of the hydraulic cylinder and serves to contain and guide the movement of the piston. The hydraulic cylinder barrel is usually made of high-strength alloy steel or stainless steel to withstand the pressure of high-pressure liquid and resist corrosion. The inside of the hydraulic cylinder barrel usually needs to be precisely drilled to accommodate the piston. This process requires high-precision machining equipment to ensure the smoothness and diameter accuracy of the inside of the cylinder barrel. In order to ensure smooth movement of the piston in the cylinder barrel, the inner surface of the cylinder barrel needs to be honed to reduce friction and wear. The outer surface of the cylinder barrel usually needs to be precisely machined such as turning and grinding to ensure the accuracy of the external dimensions and the smoothness of the surface. The two ends of the cylinder barrel usually need to be face machined to ensure the connection with the hydraulic cylinder and the installation of the sealing components. The two end faces usually need to be machined into flat surfaces perpendicular to the cylinder barrel axis. However, during the processing of the two ends of the hydraulic cylinder barrel, the cylinder barrel is usually clamped and fixed at one end first, and then the other end is processed. When the processing of one end of the cylinder barrel is completed, the cylinder barrel needs to be removed and clamped and fixed at the processed end, and then the unprocessed end is processed. The processing of the two ends of the hydraulic cylinder barrel usually includes honing, drilling, threading, assembly, welding, etc. However, the current processing of the two ends of the hydraulic cylinder barrel requires separate tool clamping and fixing, which is cumbersome and affects the work efficiency of the processing of the two ends of the hydraulic cylinder barrel. SUMMARY

[0003] In view of the deficiencies of the prior art, the present application aims to provide a double-end adjustable fixing tool for hydraulic cylinder barrel end processing to solve the problems raised in the background art.

[0004] According to an aspect of the present application, a double-head adjustable fixing tool for hydraulic cylinder barrel end processing includes a base, radial fixing mechanisms, a driving mechanism, a support frame, axial fixing mechanisms, and a rotating fixing assembly. Two groups of radial fixing mechanisms are symmetrically slidably arranged on the base along the length direction thereof, and are arranged at the two ends of the base respectively. The two groups of radial fixing mechanisms are used for fixing the two ends of the hydraulic cylinder barrel respectively, and each group of radial fixing mechanisms is connected with a separate driving mechanism. The driving mechanism is mounted on the base. A support frame is fixedly mounted at the middle part of the base. Two groups of axial fixing mechanisms are symmetrically slidably arranged at the top of the support frame. A rotating fixing assembly is fixedly arranged on the outer side wall of the middle part of the hydraulic cylinder barrel. The two groups of axial fixing mechanisms are arranged on the two sides of the rotating fixing assembly, and the axial fixing mechanisms are all arranged towards the rotating fixing assembly.

[0005] Preferably, guide rails are fixedly arranged on the two sides of the base along the length direction thereof. The two groups of radial fixing mechanisms are slidably arranged on the guide rails. The radial fixing mechanism includes a sliding plate, a fixed rod, a fixed frame, a telescopic hydraulic cylinder, a mounting seat, and an axial support roller. First sliding blocks are fixedly arranged on the two sides of the bottom of the sliding plate. The first sliding blocks are slidably arranged on the guide rails. A moving block is fixedly arranged at the middle part of the bottom of the sliding plate. The moving block is connected with the driving mechanism. Fixed rods are vertically fixedly arranged on the two sides of the top of the sliding plate. The top of the fixed rod is fixedly connected with a fixed frame. The fixed frame is a circumferentially closed structure. A plurality of telescopic hydraulic cylinders are uniformly and equidistantly mounted on the fixed frame along the circumferential direction thereof. The extending ends of the plurality of telescopic hydraulic cylinders are telescopically arranged towards the center of the fixed frame. A radial support roller is rotatably mounted on the extending end of each telescopic hydraulic cylinder. At least one telescopic hydraulic cylinder is mounted on the bottom of the fixed frame. Mounting seats are fixedly mounted on the two sides of the inner bottom of the fixed frame. An axial support roller is rotatably mounted on each mounting seat. Each axial support roller is obliquely arranged towards the center of the fixed frame.

[0006] Preferably, the rotating axis of the radial support roller is parallel to the axis of the hydraulic cylinder barrel. When the axial support roller contacts with the outer side wall of the hydraulic cylinder barrel, the tangent direction is parallel to the axial direction of the hydraulic cylinder barrel. The first sliding block is a locking sliding block.

[0007] Preferably, the driving mechanism includes a driving motor and a lead screw. The driving motor is fixedly mounted on the base. The output shaft of the driving motor is fixedly connected with the lead screw. The length direction of the lead screw is parallel to the length direction of the guide rail. The two ends of the lead screw are mounted on the base through bearing seats. The lead screw is threadedly connected with the moving block.

[0008] Preferably, a slide rail is fixedly arranged on the top of the support frame, the length direction of the slide rail is perpendicular to the length direction of the hydraulic cylinder, and two groups of the axial fixing mechanisms are symmetrically and slidably arranged at the two ends of the slide rail.

[0009] Preferably, the rotation axis of the supporting roller is perpendicular to the rotation axis of the rotation fixing assembly, and the second sliding block is a locking sliding block.

[0010] Preferably, the rotation fixing assembly comprises a semicircular fixing sleeve, a semicircular limiting outer tooth disc and a connecting lug, the semicircular limiting outer tooth disc is fixedly arranged on the outer side of the semicircular fixing sleeve, the outer periphery of the semicircular limiting outer tooth disc is provided with meshing teeth, the connecting lug is fixedly arranged at each of the four corners of the semicircular fixing sleeve, two semicircular fixing sleeves are sleeved on the two sides of the outer wall of the middle part of the hydraulic cylinder, the two semicircular fixing sleeves and the two semicircular limiting outer tooth discs are assembled to form a whole circular structure, the connecting lugs on the two semicircular fixing sleeves are aligned and fixedly connected by connecting bolts, the two semicircular limiting outer tooth discs after assembly are meshingly connected with the rotation gear, and the oppositely arranged two supporting rollers on one side are in contact with the two side surfaces of the semicircular limiting outer tooth disc.

[0011] Preferably, the rotation axes of the two semicircular fixing sleeves and the two semicircular limiting outer tooth discs after assembly coincide with the axis of the hydraulic cylinder.

[0012] Preferably, an anti-skid layer is fixedly arranged on the inner side wall of the semicircular fixing sleeve, and the anti-skid layer is uniformly provided with protrusions.

[0013] Preferably, the anti-skid layer and the protrusions are made of rubber.

[0014] The double-head adjustable fixing tool for hydraulic cylinder barrel end machining provided by the application can clamp and fix the two ends of the hydraulic cylinder barrel through the two symmetrical radial fixing mechanisms, so that the two ends of the hydraulic cylinder barrel can be processed without the need of disassembling and reassembling the hydraulic cylinder barrel, and the two radial fixing mechanisms are connected with two separate driving mechanisms, so that the two radial fixing mechanisms can be independently moved and adjusted to adapt to hydraulic cylinder barrels of different lengths, and the radial fixing mechanisms are circumferentially and uniformly provided with telescopic hydraulic cylinders to clamp and fix the hydraulic cylinder barrels, which can adapt to hydraulic cylinder barrels of different diameters; the rotation fixing assembly and the axial fixing mechanism arranged on the two sides of the rotation fixing assembly are fixedly installed on the outer wall of the middle part of the hydraulic cylinder barrel, so that the axial fixing mechanism can limit the axial movement of the rotation fixing assembly, and then limit the axial movement of the hydraulic cylinder barrel during processing, so as to ensure the stable processing of the two ends of the hydraulic cylinder barrel. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 FIG. 1 is a perspective view of a double-head adjustable fixing tool for hydraulic cylinder barrel end machining according to an embodiment of the application.

[0016] Figure 2 FIG. 2 is a side view of a double-head adjustable fixing tool for hydraulic cylinder barrel end machining according to an embodiment of the application.

[0017] Figure 3 FIG. 3 is a side view of a radial fixing mechanism of a double-head adjustable fixing tool for hydraulic cylinder barrel end machining according to an embodiment of the application.

[0018] Figure 4 FIG. 4 is a perspective view of a rotation fixing assembly and an axial fixing mechanism of a double-head adjustable fixing tool for hydraulic cylinder barrel end machining according to an embodiment of the application.

[0019] Figure 5 FIG. 5 is a side view of a rotation fixing assembly and an axial fixing mechanism of a double-head adjustable fixing tool for hydraulic cylinder barrel end machining according to an embodiment of the application.

[0020] Figure 6 FIG. 6 is a perspective view of a rotation fixing assembly and an axial fixing mechanism of a double-head adjustable fixing tool for hydraulic cylinder barrel end machining according to an embodiment of the application from another angle.

[0021] Figure 7 FIG. 7 is a top view of a rotation fixing assembly and an axial fixing mechanism of a double-head adjustable fixing tool for hydraulic cylinder barrel end machining according to an embodiment of the application.

[0022] Figure 8It is a split view of a rotating fixing assembly of a double-head adjustable fixing tool for hydraulic cylinder barrel end processing according to an embodiment of the application.

[0023] Figure 9 It is a structure schematic view of a hydraulic cylinder barrel placed on an axial support roller of a double-head adjustable fixing tool for hydraulic cylinder barrel end processing according to an embodiment of the application.

[0024] Reference signs: 1, base; 2, radial fixing mechanism; 21, sliding plate; 22, fixing rod; 23, fixing frame; 24, telescopic hydraulic cylinder; 25, mounting seat; 26, axial support roller; 27, first sliding block; 28, moving block; 29, radial support roller; 3, driving mechanism; 31, driving motor; 32, lead screw; 4, support frame; 5, axial fixing mechanism; 51, second sliding block; 52, support column; 53, open support; 54, supporting roller; 55, rotating motor; 56, rotating gear; 6, rotating fixing assembly; 61, semicircular fixing sleeve; 62, semicircular limiting outer tooth disc; 63, connecting lug; 64, connecting bolt; 65, anti-skid layer; 7, hydraulic cylinder barrel; 8, guide rail; 9, sliding rail. DETAILED DESCRIPTION

[0025] In order to make the content of the application more easily understood, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the drawings in the embodiments of the application. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" refer to the directions towards or away from the geometric center of a specific component. In addition, the terms "first", "second", etc. are only used for description purposes and should not be understood as indicating or implying relative importance.

[0026] As Figure 1 and Figure 2As shown, a double adjustable fixing tool for hydraulic cylinder barrel end processing, including base 1, radial fixing mechanism 2, drive mechanism 3, support frame 4, axial fixing mechanism 5 and rotary fixing assembly 6, the guide rail 8 is fixed on both sides of the base 1 along the length direction, the radial fixing mechanism 2 is symmetrically slid on the guide rail 8 of the base 1 along the length direction, the radial fixing mechanism 2 is arranged at both ends of the base 1, and the radial fixing mechanism 2 is used for fixing the two ends of the hydraulic cylinder barrel 7, and each radial fixing mechanism 2 is connected with a separate drive mechanism 3, the drive mechanism 3 is installed on the base 1, the support frame 4 is fixedly installed on the middle part of the base 1, the slide rail 9 is fixedly installed on the top of the support frame 4, the length direction of the slide rail 9 is perpendicular to the length direction of the hydraulic cylinder barrel 7, the axial fixing mechanism 5 is symmetrically slid on both ends of the slide rail 9, the rotary fixing assembly 6 is fixedly installed on the outer side wall of the middle part of the hydraulic cylinder barrel 7, the axial fixing mechanism 5 is distributed on both sides of the rotary fixing assembly 6, and the axial fixing mechanism 5 is arranged towards the rotary fixing assembly 6, in the design, the two radial fixing mechanisms 2 can clamp and fix the two ends of the hydraulic cylinder barrel 7 respectively, so that the two ends of the hydraulic cylinder barrel 7 can be processed, the hydraulic cylinder barrel 7 does not need to be disassembled and reinstalled, the two radial fixing mechanisms 2 are connected with two separate drive mechanisms 3 respectively, so that the two radial fixing mechanisms 2 can move and adjust independently to adapt to hydraulic cylinder barrels 7 of different lengths, and the radial fixing mechanism 2 can adapt to hydraulic cylinder barrels 7 of different diameters; the rotary fixing assembly 6 is fixedly installed on the outer side wall of the middle part of the hydraulic cylinder barrel 7, and the axial fixing mechanism 5 is arranged on both sides of the rotary fixing assembly 6, so that the axial fixing mechanism 5 can limit the axial movement of the rotary fixing assembly 6, and then the axial movement of the hydraulic cylinder barrel 7 during processing can be limited, so as to ensure the stable processing of the two ends of the hydraulic cylinder barrel 7.

[0027] In one embodiment, in conjunction with Figure 1 and Figure 3The radial fixing mechanism 2 comprises a sliding plate 21, a fixing rod 22, a fixing frame 23, a telescopic hydraulic cylinder 24, a mounting seat 25 and an axial support roller 26. First sliding blocks 27 are fixedly arranged on the bottom of the sliding plate 21. The first sliding blocks 27 are slidingly arranged on the guide rail 8. The first sliding blocks 27 are locking sliding blocks. When the sliding plate 21 is moved and adjusted, the first sliding blocks 27 can be locked to fix the position of the sliding plate 21, so that the machining process is stable. A moving block 28 is fixedly arranged at the middle of the bottom of the sliding plate 21. The moving block 28 is connected with the driving mechanism 3. The fixing rods 22 are vertically and fixedly arranged on the top of the sliding plate 21. The top of the fixing rod 22 is fixedly connected with the fixing frame 23. The fixing frame 23 has a circumferentially closed structure. At least three telescopic hydraulic cylinders 24 are uniformly and equidistantly arranged on the fixing frame 23 in the circumferential direction. The extending end of each telescopic hydraulic cylinder 24 is telescopically arranged towards the center of the fixing frame 23. A radial support roller 29 is rotatably arranged at the extending end of each telescopic hydraulic cylinder 24. Specifically, the rotation axis of the radial support roller 29 is parallel to the axis of the hydraulic cylinder barrel 7, so that the radial support roller 29 can rotate when the hydraulic cylinder barrel 7 rotates. At least one telescopic hydraulic cylinder 24 is arranged at the bottom of the fixing frame 23. Mounting seats 25 are fixedly arranged at the bottom of the inner side of the fixing frame 23. An axial support roller 26 is rotatably arranged on each mounting seat 25. Each axial support roller 26 is obliquely arranged towards the center of the fixing frame 23. The axial support roller 26 provides a support point for the end of the hydraulic cylinder barrel 7 when the end of the hydraulic cylinder barrel 7 is placed on the fixing frame 23, so that the other end of the hydraulic cylinder barrel 7 can be placed and the telescopic hydraulic cylinder 24 can clamp and fix the end of the hydraulic cylinder barrel 7 (as shown in Figure 9 Specifically, when the axial support roller 26 contacts the outer side wall of the hydraulic cylinder barrel 7, the tangent direction is parallel to the axis direction of the hydraulic cylinder barrel 7. This structure facilitates the movement of the axial support roller 26 along the axis of the hydraulic cylinder barrel 7 during the adjustment of the placement position of the end of the hydraulic cylinder barrel 7. In the specific implementation, the radial fixing mechanisms 2 arranged at the two ends of the base 1 are respectively driven by the driving mechanisms 3 to move the moving blocks 28, which drives the sliding plate 21 to slide on the guide rail 8 through the first sliding blocks 27. Then, the fixing frame 23 is moved to a position suitable for the length of the two ends of the hydraulic cylinder barrel 7. Then, one end of the hydraulic cylinder barrel 7 is inserted through the center of the fixing frame 23 of the radial fixing mechanism 2 arranged at one end of the base 1 and is placed on the axial support roller 26 (as shown in Figure 9 Then, the other end of the hydraulic cylinder barrel 7 is inserted through the center of the fixing frame 23 of the radial fixing mechanism 2 arranged at the other end of the base 1 and is placed on the axial support roller 26. Then, the radial fixing mechanisms 2 are further moved and adjusted to a more suitable position by the driving mechanisms 3, and the first sliding blocks 27 are locked. Then, the telescopic hydraulic cylinders 24 are controlled to extend by the same length and clamp and fix the two ends of the hydraulic cylinder barrel 7. The telescopic hydraulic cylinders 24 can adapt to hydraulic cylinder barrels 7 of different diameters.

[0028] In one embodiment, referring to Figure 1 The driving mechanism 3 comprises a driving motor 31 and a lead screw 32. The driving motor 31 is fixedly installed on the base 1. The output shaft of the driving motor 31 is fixedly connected with the lead screw 32. The length direction of the lead screw 32 is parallel to the length direction of the guide rail 8. Both ends of the lead screw 32 are installed on the base 1 through supporting seats. The lead screw 32 is threadedly connected with the moving block 28. In a specific implementation, the driving motor 31 drives the lead screw 32 to rotate, thereby driving the moving block 28 to move along the lead screw 32, thereby driving the sliding plate 21 to slide on the guide rail 8 through the first sliding block 27, and thereby driving the fixing frame 23 to move.

[0029] In one embodiment, referring to Figures 4 to 8The axial fixing mechanism 5 comprises a second sliding block 51, a support column 52, an open support 53, a supporting roller 54 and a rotating motor 55. The second sliding block 51 is slidingly arranged on the sliding rail 9. The top of the second sliding block 51 is vertically fixedly provided with the support column 52. The top of the support column 52 is fixedly provided with the open support 53. The two sides of the open support 53 are oppositely rotatably provided with two supporting rollers 54. The support column 52 is fixedly provided with the rotating motor 55. The output end of the rotating motor 55 is fixedly provided with a rotating gear 56. The rotating gear 56 is in transmission connection with the rotating fixing assembly 6. Specifically, the rotating fixing assembly 6 comprises a semicircular fixing sleeve 61, a semicircular limiting outer tooth disc 62 and a connecting lug 63. The semicircular fixing sleeve 61 is fixedly provided with the semicircular limiting outer tooth disc 62 on the outside. The semicircular limiting outer tooth disc 62 is provided with meshing teeth on the outer circumferential side. The four corner positions of the semicircular fixing sleeve 61 are fixedly provided with the connecting lug 63. The two semicircular fixing sleeves 61 are sleeved on the two sides of the outer wall of the middle part of the hydraulic cylinder barrel 7. The two semicircular fixing sleeves 61 and the two semicircular limiting outer tooth discs 62 are assembled to form a whole circular structure. The rotation axes of the two semicircular fixing sleeves 61 and the two semicircular limiting outer tooth discs 62 after assembly coincide with the axis of the hydraulic cylinder barrel 7. The rotation axes of the supporting rollers 54 are perpendicular to the rotation axes of the semicircular limiting outer tooth discs 62. This arrangement facilitates the rotation of the supporting rollers 54 when the semicircular limiting outer tooth discs 62 rotate. The connecting lugs 63 on the two semicircular fixing sleeves 61 are aligned and fixedly connected through connecting bolts 64. The two semicircular limiting outer tooth discs 62 after assembly are in meshing connection with the rotating gear 56. The oppositely arranged two supporting rollers 54 on one side of the hydraulic cylinder barrel 7 are respectively in abutment with the two side faces of the semicircular limiting outer tooth disc 62.

[0030] Specifically, the diameter size of the semicircular fixing sleeve 61 is made according to the diameter size of the hydraulic cylinder barrel 7 to be processed.

[0031] Specifically, the second slider 51 is selected as a locking slider, so that when the second slider 51 drives the supporting roller 54 to move to the two side surfaces of the semicircular limiting outer gear plate 62, the second slider 51 can be locked to fix the position of the supporting roller 54, thereby enabling the supporting roller 54 to more stably limit the axial movement of the rotation fixing assembly 6 and the hydraulic cylinder barrel 7.

[0032] In one embodiment, with reference to Figure 8 , the inner side wall of the semicircular fixing sleeve 61 is fixedly provided with an anti-skid layer 65, and the anti-skid layer 65 is uniformly provided with protrusions, and the anti-skid layer 65 and the protrusions are both made of rubber material. This arrangement can more closely connect the semicircular fixing sleeve 61 and the hydraulic cylinder barrel 7, and prevent relative sliding between the semicircular fixing sleeve 61 and the hydraulic cylinder barrel 7.

[0033] Working principle: in use, first, the radial fixing mechanism 2 arranged at both ends of the base 1 is driven by the driving motor 31 to rotate the lead screw 32, thereby driving the moving block 28 to move along the lead screw 32, thereby driving the sliding plate 21 to slide on the guide rail 8 through the first slider 27, thereby moving the fixed frame 23 to a position suitable for the length of the two ends of the hydraulic cylinder barrel 7. Then, one end of the hydraulic cylinder barrel 7 is inserted through the center of the fixed frame 23 of the radial fixing mechanism 2 arranged at one end of the base 1 and placed on the axial support roller 26 (as shown in Figure 9 ), and then the other end of the hydraulic cylinder barrel 7 is inserted through the center of the fixed frame 23 of the radial fixing mechanism 2 arranged at the other end of the base 1 and placed on the axial support roller 26, and then the radial fixing mechanism 2 is further moved and adjusted to a more suitable position by the driving mechanism 3 and the first slider 27 is locked. Then, the telescopic hydraulic cylinder 24 is controlled to extend the same length and clamp and fix the two ends of the hydraulic cylinder barrel 7. After the radial fixing mechanism 2 clamps and fixes the two ends of the hydraulic cylinder barrel 7, the two semicircular fixing sleeves 61 are assembled and placed on the outer side wall of the middle part of the hydraulic cylinder barrel 7 and are fixedly connected by the connecting bolts 64 to tightly connect the semicircular fixing sleeves 61 and the hydraulic cylinder barrel 7. When the semicircular fixing sleeves 61 are installed, the plane where the semicircular limiting outer gear plate 62 is located is located between the two oppositely arranged supporting rollers 54. After the semicircular fixing sleeves 61 are installed, the second slider 51 is slid to drive the supporting roller 54 to move to the two side surfaces of the semicircular limiting outer gear plate 62, so that they abut against each other, and the second slider 51 is locked, and at the same time, the rotating gear 56 on the rotating motor 55 is engaged with the two assembled semicircular limiting outer gear plates 62, thereby enabling the rotating motor 55 to drive the rotating gear 56 to rotate, and through the engagement transmission between the rotating gear 56 and the semicircular limiting outer gear plate 62, the semicircular limiting outer gear plate 62 and the semicircular fixing sleeve 61 drive the hydraulic cylinder barrel 7 to rotate, so as to process the two ends of the hydraulic cylinder barrel 7.

[0034] The above examples are only used to illustrate the technical solutions of the embodiments of the present application, but not to limit them. Although the embodiments of the present application are explained in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that, without departing from the spirit and scope defined by the claims of the present application, they can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for some of the technical features.

Claims

1. A double-headed adjustable fixing fixture for machining the end of a hydraulic cylinder barrel, comprising a base (1), a radial fixing mechanism (2), a drive mechanism (3), a support frame (4), an axial fixing mechanism (5), and a rotating fixing assembly (6), characterized in that, Two sets of radial fixing mechanisms (2) are slidably provided on the base (1) along its length direction. The two sets of radial fixing mechanisms (2) are symmetrically arranged at both ends of the base (1), and the two sets of radial fixing mechanisms (2) are respectively used to fix the two ends of the hydraulic cylinder (7). Each set of radial fixing mechanisms (2) is connected to a separate drive mechanism (3). The drive mechanism (3) is installed on the base (1). A support frame (4) is fixedly installed in the middle of the base (1). Two sets of axial fixing mechanisms (5) are symmetrically slidably provided on both sides of the top of the support frame (4). A rotating fixing component (6) is fixedly provided on the outer wall of the middle part of the hydraulic cylinder (7). The two sets of axial fixing mechanisms (5) are distributed on both sides of the rotating fixing component (6), and the axial fixing mechanisms (5) are all facing the rotating fixing component (6). The top of the support frame (4) is fixedly provided with a slide rail (9). The length direction of the slide rail (9) is perpendicular to the length direction of the hydraulic cylinder (7). Two sets of axial fixing mechanisms (5) are symmetrically slidably disposed at both ends of the slide rail (9). The axial fixing mechanism (5) includes a second slider (51), a support column (52), an open support (53), a support roller (54), and a rotary motor (55). The second slider (51) is slidably disposed on the slide rail (9). The top of the second slider (51) is vertically fixed with the support column (52). A support column (52) is provided with an open support (53) fixedly on the top of the support column (52). Two abutting rollers (54) are provided on both sides of the open support (53) in opposite directions. The two abutting rollers (54) abut against the axial sides of the rotating fixing assembly (6) respectively. A rotary motor (55) is fixedly installed on the support column (52). The output end of the rotary motor (55) is fixedly installed on the rotary gear (56). The rotary gear (56) is connected to the rotary fixing assembly (6) in a transmission manner. The rotating fixing assembly (6) includes a semi-circular fixing sleeve (61), a semi-circular limiting external gear disc (62), and connecting ears (63). The semi-circular fixing sleeve (61) is fixedly provided with a semi-circular limiting external gear disc (62) on its outer side. The outer circumference of the semi-circular limiting external gear disc (62) is provided with meshing teeth. Connecting ears (63) are fixedly provided at the four corners of the semi-circular fixing sleeve (61). Two semi-circular fixing sleeves (61) are fitted on both sides of the outer wall of the middle part of the hydraulic cylinder (7), and the two semi-circular... The fixed sleeve (61) and the two semi-circular limiting external gear discs (62) are assembled to form a complete circular structure. The connecting ears (63) on the two semi-circular fixed sleeves (61) are aligned and fixedly connected by connecting bolts (64). The two semi-circular limiting external gear discs (62) after assembly are meshed with the rotating gear (56). The two opposing abutting rollers (54) located on one side of the hydraulic cylinder (7) abut against the two sides of the semi-circular limiting external gear discs (62).

2. The double-headed adjustable fixing fixture for machining the end of a hydraulic cylinder barrel according to claim 1, characterized in that, The base (1) has guide rails (8) fixed on both sides along its length. Two sets of radial fixing mechanisms (2) are symmetrically arranged and slidably mounted on the guide rails (8). The radial fixing mechanism (2) includes a sliding plate (21), a fixing rod (22), a fixing frame (23), a telescopic hydraulic cylinder (24), a mounting base (25), and an axial support roller (26). The bottom sides of the sliding plate (21) are fixed with first sliders (27), which are slidably mounted on the guide rails (8). The bottom center of the sliding plate (21) is fixed with a moving block (28), which is connected to the driving mechanism (3). The top sides of the sliding plate (21) are vertically fixed with fixing rods (22), which are connected to the top of the sliding plate (21). The fixed frame (23) is fixedly connected. The fixed frame (23) is a circumferential closed structure. Multiple telescopic hydraulic cylinders (24) are evenly and equidistantly installed on the fixed frame (23) along its circumference. The extended ends of the multiple telescopic hydraulic cylinders (24) are all telescopically set toward the center of the fixed frame (23). Radial support rollers (29) are rotatably installed on the extended ends of each telescopic hydraulic cylinder (24). At least one telescopic hydraulic cylinder (24) is installed at the bottom of the fixed frame (23). Mounting seats (25) are fixedly installed on both sides of the bottom inner side of the fixed frame (23). Axial support rollers (26) are rotatably installed on each mounting seat (25). Each axial support roller (26) is obliquely set toward the center of the fixed frame (23).

3. The double-headed adjustable fixing fixture for machining the end of a hydraulic cylinder barrel according to claim 2, characterized in that, The rotation axis of the radial support roller (29) is parallel to the axis of the hydraulic cylinder (7), the tangent direction of the axial support roller (26) when it contacts the outer wall of the hydraulic cylinder (7) is parallel to the axial direction of the hydraulic cylinder (7), and the first slider (27) is a locking slider.

4. The double-headed adjustable fixing fixture for machining the end of a hydraulic cylinder barrel according to claim 2, characterized in that, The drive mechanism (3) includes a drive motor (31) and a lead screw (32). The drive motor (31) is fixedly installed on the base (1). The output shaft of the drive motor (31) is fixedly connected to the lead screw (32). The length direction of the lead screw (32) is parallel to the length direction of the guide rail (8). Both ends of the lead screw (32) are installed on the base (1) through support seats. The lead screw (32) is threadedly connected to the moving block (28).

5. The double-headed adjustable fixing fixture for machining the end of a hydraulic cylinder barrel according to claim 1, characterized in that, The rotation axis of the supporting roller (54) is perpendicular to the rotation axis of the rotating fixing assembly (6), and the second slider (51) is a locking slider.

6. The double-headed adjustable fixing fixture for machining the end of a hydraulic cylinder barrel according to claim 1, characterized in that, The rotation axes of the two assembled semi-circular fixing sleeves (61) and the two semi-circular limiting external gear discs (62) coincide with the axis of the hydraulic cylinder (7).

7. The double-headed adjustable fixing fixture for machining the end of a hydraulic cylinder barrel according to claim 1, characterized in that, An anti-slip layer (65) is fixedly provided on the inner wall of the semi-circular fixing sleeve (61), and protrusions are evenly provided on the anti-slip layer (65).

8. The double-headed adjustable fixing fixture for machining the end of a hydraulic cylinder barrel according to claim 7, characterized in that, Both the anti-slip layer (65) and the protrusions are made of rubber.

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