A guide sleeve machining tool

Abstract

The utility model discloses a guide bush processing frock, including the mounting ring, the mounting ring is fixedly connected with the fixed plate, the fixed plate is embedded with the fixed tube, the fixed tube slidingly connected with the sliding rod, the sliding rod is fixedly connected with the fixed part, the fixed part with fixed tube between fixedly connected with the rubber cylinder, the central axis of rubber cylinder with the midline axis of sliding rod axial each other coincides, the fixed plate is fixedly connected with pneumatic push rod, and the telescopic end of pneumatic push rod with sliding rod fixedly connected. Through pneumatic push rod drive sliding rod drive fixed part axial movement, extrude inside rubber cylinder even outward expansion, and combine articulated link and the linkage structure of connecting block, ensure that rubber cylinder along the circumference and axial synchronous expansion, form the support of comprehensive, even and rigid to the thin wall guide bush inner wall. This effectively offsets the cutting force, and the elastic deformation and plastic deformation risk that greatly reduced because of the insufficient rigidity, thereby guaranteed the key dimension precision and shape accuracy of guide bush.

Description

Technical Field

[0001] This utility model relates to the field of guide sleeve processing technology, and more specifically, it relates to a guide sleeve processing tooling. Background Technology

[0002] The cylinder bottom and guide sleeve of the hydraulic cylinder, including the column and jack, are key installation components of the hydraulic support core system, and their machining accuracy directly affects subsequent installation and performance. With the upgrading and iteration of cylinder ring-type parts structures, the application of new processes has also brought challenges. Among them, widely used large-diameter thin-walled sleeve parts are prone to deformation during machining due to their poor rigidity and weak strength. Severe deformation exceeding tolerances can directly lead to product quality problems. Even more seriously, if the deformation of the thin-walled guide sleeve exceeds the tolerance, it cannot meet the usage requirements and must be scrapped, thus significantly increasing the overall costs of product procurement, forging, and machining.

[0003] Existing guide sleeve tooling uses multi-jaw chucks for fixing, but multi-jaw chucks have the following problems when used:

[0004] 1. When existing guide sleeve tooling applies clamping force to thin-walled guide sleeves, due to their thin wall thickness and insufficient rigidity, slight elastic deformation inevitably occurs under the clamping force. This deformation directly destroys the original geometric state of the guide sleeve, resulting in a significant impact on its critical dimensional and shape accuracy, making it difficult to meet the high-precision requirements of subsequent assembly and use.

[0005] 2. Currently, guide sleeve tooling generally relies on chucks for fixation, which presents a significant operational contradiction: if the clamping force is insufficient, the guide sleeve will wobble during processing, seriously affecting processing stability and surface quality; while if the clamping force is too large, the chucks only act on a local area of ​​the outer wall, resulting in extremely uneven force distribution, which can easily cause plastic deformation or even overall ellipticization of the clamped part of the guide sleeve, similarly seriously damaging accuracy.

[0006] 3. When clamping the guide sleeve, the existing tooling only applies external force to fix it, completely neglecting to provide necessary support for its thin-walled inner cavity. During the machining process, the guide sleeve bears external cutting force and clamping force for a long time, but lacks internal rigid support to resist deformation. Ultimately, due to insufficient overall rigidity, significant deformation occurs, resulting in the accuracy of the machined part being far lower than the design requirements.

[0007] Therefore, there is an urgent need for a tooling for machining guide sleeves. Utility Model Content

[0008] (a) Technical problems to be solved

[0009] In view of the problems existing in the prior art, this utility model provides a guide sleeve processing fixture to solve the technical problems mentioned in the background art.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, this utility model provides the following technical solution: a guide sleeve processing fixture, including an installation ring, a fixing plate fixedly connected to the installation ring, a fixing tube embedded in the fixing plate, a sliding rod slidably connected to the fixing tube, a fixing member fixedly connected to the sliding rod, a rubber cylinder fixedly connected between the fixing member and the fixing tube, the central axis of the rubber cylinder coinciding with the axial centerline of the sliding rod, a pneumatic push rod fixedly connected to the fixing plate, the telescopic end of the pneumatic push rod fixedly connected to the sliding rod, a support structure provided inside the rubber cylinder, and an external extrusion structure provided on the fixing plate.

[0012] The present invention is further configured such that the central axis of the fixed tube coincides with the central axis of the fixed plate.

[0013] The present invention is further configured such that the support structure includes a plurality of fixed seats, the plurality of fixed seats are fixed to the opposite sides of the fixed tube and the fixed member, the inner wall of the rubber tube is fixed with axially equally spaced connecting blocks, and the connecting blocks are hinged to adjacent fixed seats with hinge rods.

[0014] The present invention is further configured such that the fixing tube and the fixing seat on the fixing member are both distributed at equal intervals in the circumferential direction.

[0015] The present invention is further configured such that the external extrusion structure includes a support ring, the support ring is fixedly connected to the fixed plate, the central axis of the support ring coincides with the central axis of the fixed plate, and the support ring is splined with circumferentially equally spaced spline rods.

[0016] The present invention is further configured such that a spherical block is fixedly connected to one end of the spline rod, a compression block is fixedly connected to the other end of the spline rod, and an elastic element is fixedly connected between the compression block and the support ring.

[0017] The present invention is further configured such that a connecting frame is slidably connected to the fixed plate, the connecting frame is fixedly connected to the sliding rod, and a compression ring is fixedly connected to the connecting frame.

[0018] The present invention is further configured such that the inner ring surface of the extrusion ring is provided with an inclined surface, and the extrusion ring abuts against the spherical block.

[0019] (III) Beneficial Effects

[0020] Compared with the prior art, this utility model provides a guide sleeve machining fixture, which has the following beneficial effects:

[0021] 1. This utility model uses a pneumatic push rod to drive a sliding rod, causing the fixed component to move axially. This compresses the internal rubber cylinder, causing it to expand evenly outward. Combined with the linkage structure of the hinge rod and connecting block, this ensures that the rubber cylinder expands synchronously in both the circumferential and axial directions, forming comprehensive, uniform, and rigid support for the inner wall of the thin-walled guide sleeve. This effectively counteracts the cutting force and greatly reduces the risk of elastic and plastic deformation caused by insufficient rigidity, thereby ensuring the critical dimensional and shape accuracy of the guide sleeve.

[0022] 2. This invention utilizes the movement of a sliding rod to drive the axial movement of the extrusion ring via a connecting frame. The inclined surface of the extrusion ring drives the circumferentially distributed splined rods to slide radially inward, causing the extrusion block to apply a uniform radial clamping force to the outer wall of the guide sleeve under the action of the elastic element. This synchronous, flexible, and controllable clamping method significantly enhances the overall rigidity of the workpiece, effectively suppresses processing vibration and sway, ensures high coaxiality between the guide sleeve and the fixed plate, and improves the stability of the processing and the final form and position tolerances.

[0023] 3. The entire clamping and unclamping process of this utility model is driven by a single pneumatic push rod. After processing, the push rod retracts, allowing the sliding rod and fixing parts to reset. The rubber sleeve, under its own elasticity and structural action, returns to its original shape and releases the inner support; simultaneously, the extrusion ring resets, and the spline rod, under the tension of the elastic element, drives the extrusion block to quickly and radially loosen. This integrated, automated linkage design enables rapid and non-destructive clamping and disassembly of the guide sleeve, significantly improving production efficiency. It is especially suitable for batch processing scenarios and avoids damage to parts caused by improper manual operation. Attached Figure Description

[0024] Figure 1 This is a front structural diagram of a guide sleeve processing fixture according to the present invention;

[0025] Figure 2 This is a rear view structural schematic diagram of a guide sleeve processing fixture according to the present invention;

[0026] Figure 3 This is a cross-sectional view of the fixing plate and the rubber sleeve in this utility model;

[0027] Figure 4 This is a structural schematic diagram of the fixing tube and fixing component in this utility model;

[0028] Figure 5 This is a schematic diagram of the connecting block and hinge rod in this utility model;

[0029] Figure 6 This is a cross-sectional view of the support ring and the extrusion ring in this utility model;

[0030] Figure 7 This is a schematic diagram of the spline rod and extrusion block in this utility model.

[0031] In the diagram: 1. Mounting ring; 2. Fixing plate; 3. Fixing tube; 4. Sliding rod; 5. Fixing component; 6. Rubber sleeve; 7. Pneumatic push rod; 8. Fixing seat; 9. Connecting block; 10. Hinge rod; 11. Support ring; 12. Spline rod; 13. Spherical block; 14. Extrusion block; 15. Elastic component; 16. Connecting frame; 17. Extrusion ring. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0034] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0035] Please see Figures 1-7 A guide sleeve processing fixture includes an installation ring 1, a fixing plate 2 fixedly connected to the installation ring 1, a fixing tube 3 embedded in the fixing plate 2, a sliding rod 4 slidably connected to the fixing tube 3, a fixing member 5 fixedly connected to the sliding rod 4, a rubber sleeve 6 fixedly connected between the fixing member 5 and the fixing tube 3, the central axis of the rubber sleeve 6 coinciding with the central axis of the sliding rod 4, a pneumatic push rod 7 fixedly connected to the fixing plate 2, the telescopic end of the pneumatic push rod 7 fixedly connected to the sliding rod 4, a support structure provided inside the rubber sleeve 6, and an external extrusion structure provided in the fixing plate 2; the central axis of the fixing tube 3 coincides with the central axis of the fixing plate 2.

[0036] Please see Figures 3-5 The support structure includes multiple fixed seats 8, which are fixed to the opposite sides of the fixed pipe 3 and the fixing member 5. The inner wall of the rubber tube 6 is fixed with axially equidistant connecting blocks 9, and the connecting blocks 9 are hinged to the adjacent fixed seats 8 with hinge rods 10. The fixed seats 8 on the fixed pipe 3 and the fixing member 5 are all circumferentially equidistantly distributed.

[0037] Please see Figure 3 , Figure 6 and Figure 7The external extrusion structure includes a support ring 11, which is fixed to a fixed plate 2. The central axis of the support ring 11 coincides with the central axis of the fixed plate 2. The support ring 11 is splined with circumferentially spaced spline rods 12. One end of the spline rod 12 is fixed to a spherical block 13, and the other end of the spline rod 12 is fixed to an extrusion block 14. An elastic element 15 is fixed between the extrusion block 14 and the support ring 11. The fixed plate 2 is slidably connected to a connecting frame 16, which is fixed to a sliding rod 4. An extrusion ring 17 is fixed to the connecting frame 16. The inner ring surface of the extrusion ring 17 is provided with an inclined surface, and the extrusion ring 17 abuts against the spherical block 13.

[0038] The working principle of this utility model is as follows: The guide sleeve is placed on the outside of the rubber cylinder 6, and then the pneumatic push rod 7 is activated. The telescopic end of the pneumatic push rod 7 drives the sliding rod 4 to slide to the left. While the sliding rod 4 slides to the left along the fixed tube 3, it drives the fixing member 5 to move to the left. The fixing member 5 squeezes the rubber cylinder 6 to the left, and the rubber cylinder 6 expands outward, thereby supporting the inner wall of the guide sleeve. When the fixing member 5 moves closer to the fixed tube 3, the two adjacent hinge rods 10 push the connecting block 9 outward. The connecting block 9 moves outward with the rubber cylinder 6. Through the cooperation of the hinge rods 10 and the connecting block 9, the rubber cylinder 6 expands outward evenly, thereby improving the coaxiality of the guide sleeve and the fixed plate 2.

[0039] As the sliding rod 4 slides to the left, the sliding rod 4 drives the extrusion ring 17 to move to the left through the connecting frame 16. The inclined surface of the extrusion ring 17 extrudes the spherical block 13, thereby causing multiple spline rods 12 to slide along the support ring 11 towards the center. The extrusion blocks 14 move closer to each other, and the elastic element 15 is stretched to extrude the outer wall of the guide sleeve, thereby improving the stability of the guide sleeve during processing. By simultaneously fixing the inner and outer sides of the guide sleeve through the extrusion blocks 14 and the rubber sleeve 6, the probability of deformation of the sliding sleeve is reduced, and the processing accuracy of the sliding sleeve is improved.

[0040] After the guide sleeve is processed, the telescopic end of the control pneumatic push rod 7 moves to the right to reset, and the sliding rod 4 moves to the right to reset through the fixing part 5, thereby restoring the rubber sleeve 6 to its initial state and releasing the pressure on the inner wall of the sliding sleeve. At the same time, the compression ring 17 moves to the right to reset, and the compression ring 17 no longer compresses the spherical block 13. At this time, under the action of the elastic part 15, the compression block 14 is reset and no longer contacts the outer wall of the guide sleeve. Then the processed guide sleeve can be removed from the rubber sleeve 6.

[0041] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A guide sleeve machining fixture, comprising an mounting ring (1), characterized in that: The mounting ring (1) is fixedly connected to a fixing plate (2), the fixing plate (2) is embedded with a fixing tube (3), the fixing tube (3) is slidably connected to a sliding rod (4), the sliding rod (4) is fixedly connected to a fixing member (5), a rubber cylinder (6) is fixedly connected between the fixing member (5) and the fixing tube (3), the central axis of the rubber cylinder (6) coincides with the central axis of the sliding rod (4), the fixing plate (2) is fixedly connected to a pneumatic push rod (7), the telescopic end of the pneumatic push rod (7) is fixedly connected to the sliding rod (4), a support structure is provided inside the rubber cylinder (6), and an external extrusion structure is provided on the fixing plate (2).

2. The guide sleeve machining fixture according to claim 1, characterized in that: The central axis of the fixed tube (3) coincides with the central axis of the fixed plate (2).

3. The guide sleeve machining fixture according to claim 1, characterized in that: The support structure includes multiple fixed seats (8), which are fixed to the opposite sides of the fixed tube (3) and the fixing member (5). The inner wall of the rubber tube (6) is fixed with axially spaced connecting blocks (9), and the connecting blocks (9) are hinged to the adjacent fixed seats (8) with hinge rods (10).

4. The guide sleeve machining fixture according to claim 3, characterized in that: The fixing seats (8) on the fixing tube (3) and the fixing member (5) are all circumferentially evenly distributed.

5. The guide sleeve machining fixture according to claim 1, characterized in that: The external extrusion structure includes a support ring (11), which is fixed to the fixed plate (2). The central axis of the support ring (11) coincides with the central axis of the fixed plate (2). The support ring (11) is splined with circumferentially spaced spline rods (12).

6. The guide sleeve machining fixture according to claim 5, characterized in that: One end of the spline rod (12) is fixedly connected to a spherical block (13), and the other end of the spline rod (12) is fixedly connected to a pressing block (14). An elastic element (15) is fixedly connected between the pressing block (14) and the support ring (11).

7. The guide sleeve machining fixture according to claim 6, characterized in that: The fixed plate (2) is slidably connected to the connecting frame (16), the connecting frame (16) is fixedly connected to the sliding rod (4), and the connecting frame (16) is fixedly connected to the compression ring (17).

8. The guide sleeve machining fixture according to claim 7, characterized in that: The inner ring surface of the extrusion ring (17) is provided with an inclined surface, and the extrusion ring (17) abuts against the spherical block (13).

Images