A crimping tool for a strainer basket assembly in a hydraulic system of a railway locomotive

Abstract

The utility model discloses a kind of for railway locomotive hydraulic system in filter screen cylinder subassembly's crimping tool, including lathe and extrusion die head assembly, extrusion die head assembly is formed by being enclosed and spliced by several fan-shaped extrusion units distributed on same circumferential plane, the center of the same circumferential plane enclosed by several fan-shaped extrusion units forms round hole storage cavity, the inner concave side of fan-shaped extrusion unit towards round hole storage cavity is protruded and is provided with the arc crimping plate head consistent with its radian, and it is formed into split crimping ring plate for the outer periphery of filter screen cylinder free end inserted and installed in round hole storage cavity inside crimping on the annular groove inside hexagonal ring connector located inside, several fan-shaped extrusion units are fixedly installed on the several clamping claws on lathe correspondingly.The semi-automated assembly processing of filter screen cylinder subassembly is realized, overall operation is good in convenience, crimping efficiency is high, crimping quality stability is good;Significantly reduce equipment development cost, substantially shorten equipment development cycle.

Description

Technical Field

[0001] This utility model relates to the technical field of filter cylinder assembly processing equipment, specifically to a crimping tool for filter cylinder assemblies in railway locomotive hydraulic systems. Background Technology

[0002] The filter cartridge assembly is a key component in the filter of the hydraulic system of railway locomotives, playing a crucial filtration role. Its main function is to filter and purify the oil through physical interception, that is, to use a porous medium to filter and remove contaminants and impurities from the fluid (liquid or gas). When the fluid passes through the filter cartridge assembly inside the filter, impurities are effectively blocked and retained, while the pure filtrate is discharged through the filter outlet. When the filter needs cleaning, simply remove the removable filter element (i.e., the filter cartridge assembly) for cleaning or replacement, and then reinstall it; its use and maintenance are very convenient.

[0003] like Figures 1-3 A filter cylinder assembly is shown, comprising a filter cylinder A, a base plate B, and a hexagonal ring connector C. The base plate B is coaxially and sealed and welded to the left end of the filter cylinder A. The hexagonal ring connector C includes an integrally coaxially connected outer hexagonal ring C-1 and a straight pipe section C-2, wherein the outer diameter of the straight pipe section C-2 is less than the outer diameter of the circumscribed circle of the outer hexagonal ring C-1. The outer circumferential surface of the straight pipe section C-2 has an circumferential groove C-3 adjacent to the outer hexagonal ring C-1, and the groove depth and groove width of the circumferential groove C-3 are both 1 mm. The straight pipe section C-2 on the hexagonal ring connector C is inserted and installed at the right end of the filter cylinder A. The right end edge of the filter cylinder A is press-fitted with an circumferential flange A-1 that bends into the circumferential groove C-3, wherein the width of the circumferential flange A-1 along the axial direction of the filter cylinder A is approximately 1 mm, that is, the right end edge of the filter cylinder A is press-fitted and fixed inside the circumferential groove C-3 on the hexagonal ring connector C.

[0004] The following problems exist in the process of assembling and processing the above-mentioned filter cylinder assembly using machine tools: (1) Since the filter cylinder is a mesh structure, if the machine tool is not properly clamped during rotation, the product is likely to fly out. Special machine tool equipment is used to design front and rear fixtures according to the product design, and the filter cylinder and hexagonal ring connector are clamped and fixed from the front and rear. A rolling cutter is used to press one end of the filter cylinder into the circumferential groove. Since the pressing width (the width of the circumferential flange) is only 1mm, if the rolling cutter is not positioned accurately, it is impossible to press one end of the filter cylinder into the circumferential groove. The quality of the assembled filter cylinder assembly is difficult to guarantee; (2) Each pair of filter cylinders and hexagonal ring connectors need to be manually fixed and clamped from the front and rear. The machine tool is operated to perform tool setting and pressing. The steps are cumbersome and inefficient; (3) Using special equipment, fixtures and cutters for pressing requires a large initial investment and a long cycle. It is suitable for the production and processing of large batches of filter cylinder assemblies. It is not economical for the production and processing of small and medium batches of filter cylinder assembly products. This utility model proposes a crimping tool for filter cylinder assemblies in railway locomotive hydraulic systems, in order to solve the above-mentioned technical problems. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide a crimping fixture for filter cylinder assemblies in railway locomotive hydraulic systems. In use, a hexagonal ring connector is inserted into the open end of the filter cylinder via a straight pipe section. Then, the filter cylinder with the hexagonal ring connector installed is inserted into the circular cavity formed by several fan-shaped extrusion units in an expanded state. When the lathe is started, the chucks drive the fan-shaped extrusion units to move inward to a preset limit position. At this point, the fan-shaped extrusion units tighten and crimp the edge of the filter cylinder's open end to the hexagonal ring connector. The circumferential groove on the upper part enables semi-automatic assembly of the filter cylinder assembly. The overall operation is convenient, and the entire product assembly cycle is about 15 seconds. The pressing efficiency is high, and the product pressing quality is stable, which greatly improves the product qualification rate. Only a few fan-shaped extrusion units need to be made. Compared with the machine tool processing method of opening molds and making rolling cutters, the equipment development cost is significantly reduced and the equipment development cycle is greatly shortened. It is suitable for the assembly and processing of small and medium batches of filter cylinder assemblies. The overall structural design is ingenious and reasonable, and it is well compatible with the chuck and jaws of the lathe, making it highly feasible for application.

[0006] To achieve the above objectives, the technical solution of this utility model is to design a crimping fixture for a filter cylinder assembly in a railway locomotive hydraulic system, including a lathe and an extrusion die assembly. The lathe has a chuck and several jaws that are radially slidably mounted on the outer end of the chuck. The extrusion die assembly is formed by several fan-shaped extrusion units distributed circumferentially on the same circumferential plane. The center of the circumferential plane formed by the fan-shaped extrusion units forms a circular cavity for inserting and installing the filter cylinder on the filter cylinder assembly. The concave side of each fan-shaped extrusion unit facing the circular cavity has an arc-shaped crimping plate head with the same curvature. The arc-shaped crimping plates on the fan-shaped extrusion units form a split crimping ring plate for crimping the outer periphery of the free end of the filter cylinder inserted into the circular cavity to the circumferential groove on the hexagonal ring joint inside the ring, forming a circumferential flange. Each of the fan-shaped extrusion units is fixedly mounted on one of the jaws.

[0007] This utility model discloses a crimping fixture for a filter cylinder assembly in a railway locomotive hydraulic system. In use, a hexagonal ring connector is inserted into the open end of the filter cylinder via a straight pipe section. Then, the filter cylinder with the hexagonal ring connector installed is inserted into the circular cavity formed by several expanded fan-shaped extrusion units. When the lathe is started, the chuck moves the fan-shaped extrusion units inward to a preset limit position. At this point, the fan-shaped extrusion units tighten and press the edge of the filter cylinder's open end into the circumferential groove on the hexagonal ring connector. The current semi-automatic assembly and processing of filter cylinder components offers excellent overall ease of operation. The entire product assembly and processing cycle is approximately 15 seconds, with high pressing efficiency and stable product pressing quality, significantly improving the product qualification rate. It only requires the self-made production of a few fan-shaped extrusion units, which significantly reduces equipment development costs and shortens the equipment development cycle compared to machine tool processing methods that require mold making and the manufacture of rolling tools. It is suitable for the assembly and processing of small to medium batches of filter cylinder components. The overall structural design is ingenious and reasonable, with good compatibility with lathe chucks and jaws, making its application and implementation highly feasible.

[0008] A preferred technical solution is that the fan-shaped extrusion unit includes fan-shaped plate one, fan-shaped plate two, and fan-shaped plate three arranged in sequence and fitted together, and the three are fixedly connected as one unit by screws passing through the corresponding mounting holes. The concave sides of the fan-shaped plate one on several of the fan-shaped extrusion units form a circular hole segment one. The inner end edge of the fan-shaped plate two protrudes from the concave side of the corresponding fan-shaped plate one to form the arc-shaped pressing plate head located at one end of the circular hole segment one. The concave sides of the fan-shaped plate three on several of the fan-shaped extrusion units form a circular hole segment two. The circular hole section one, the split-type pressing ring plate formed by the enclosing of several arc-shaped pressing plate heads, and the circular hole section two form the circular hole placement cavity. When the several fan-shaped pressing units move to the inner limit position: the circular hole section one fits snugly with the filter cylinder on the filter cylinder assembly; the split-type pressing ring plate presses the outer periphery of the free end of the filter cylinder into the circumferential groove located on its inner hexagonal ring joint; the inner diameter of the circular hole section two is greater than the outer diameter of the outer hexagonal ring circumcircle on the filter cylinder assembly; and the outer hexagonal ring on the filter cylinder assembly is embedded in the circular hole section two. The fan-shaped extrusion unit has a reasonable structural design. Fan-shaped plate one, fan-shaped plate two, and fan-shaped plate three are all made by laser cutting process to complete the pressing block. Then, screws are used to attach and fix the three together. The processing and manufacturing is convenient, the cycle is short, and the cost is low. It is especially suitable for the assembly and processing of small and medium batch filter cylinder components. The circular hole cavity formed by circular hole section one, circular hole section two, and split pressing ring plate has good compatibility with the filter cylinder with hexagonal ring connector installed at the open end. This further ensures that the edge of the filter cylinder is pressed and stable on the hexagonal ring connector.

[0009] A further preferred technical solution includes a thickness range of 15-25mm for the first sector plate, a thickness range of 1mm for the second sector plate, and a thickness range of 8-15mm for the third sector plate. The radial height of the arc-shaped pressing head formed by the inner edge of the second sector plate protruding from the concave side of the corresponding first sector plate is 0.5-0.8mm. The reasonable thickness design of the first, second, and third sector plates further ensures good fit when the filter cylinder is inserted and installed inside the circular cavity. The 1mm thickness of the second sector plate allows its inner arc-shaped pressing head to press the edge of the filter cylinder opening well into the circumferential groove on the hexagonal ring connector, forming a uniformly wide circumferential flange.

[0010] A further preferred technical solution is that the edge of the concave arc end of the arc-shaped pressing plate head is designed with a rounded chamfer structure. When the split pressing ring plate formed by the arc-shaped pressing plate heads on several fan-shaped pressing units presses the edge of the filter cylinder opening end into the circumferential groove on the hexagonal ring connector, the rounded chamfer structure effectively avoids hard pressure damage to the edge of the filter cylinder opening end, ensuring the safety of the filter cylinder and the hexagonal ring connector when they are pressed and assembled into a filter cylinder assembly.

[0011] A further preferred technical solution is that the outer flange surfaces of sector-shaped plate one, sector-shaped plate two, and sector-shaped plate three located on the same sector-shaped extrusion unit are flush, and the outer flange surface of the sector-shaped extrusion unit is welded and fixed to the inner concave side surface of the corresponding chuck. The sector-shaped extrusion unit is welded and fixed to the chuck of the lathe, which is a simple installation method and ensures that the pressing fixture of this utility model can be successfully prepared and implemented.

[0012] A further preferred technical solution is that the lathe is equipped with a foot pedal controller connected to the control system. During use, the pressing process of the filter cylinder assembly can be controlled by stepping on the foot pedal controller, further improving the ease of operation.

[0013] The advantages and beneficial effects of this utility model are as follows:

[0014] 1. This utility model discloses a crimping fixture for a filter cylinder assembly in a railway locomotive hydraulic system. In use, a hexagonal ring connector is inserted into the open end of the filter cylinder via a straight pipe section. Then, the filter cylinder with the hexagonal ring connector installed is inserted into the circular cavity formed by several fan-shaped extrusion units in an expanded state. When the lathe is started, the chucks drive the fan-shaped extrusion units to move inward to a preset limit position. At this point, the fan-shaped extrusion units tighten and crimp the edge of the filter cylinder's open end into the circumferential groove on the hexagonal ring connector. This system enables semi-automatic assembly of filter cartridge components, offering convenient operation with a total assembly cycle of approximately 15 seconds. It boasts high pressing efficiency and stable product pressing quality, significantly improving product yield. Requiring only a few self-made fan-shaped extrusion units, it significantly reduces equipment development costs and shortens the development cycle compared to machine tool processing methods involving mold making and roller burnishing. It is suitable for assembling small to medium batches of filter cartridge components. The overall structural design is ingenious and reasonable, with good compatibility with lathe chucks and jaws, ensuring high feasibility for application.

[0015] 2. The fan-shaped extrusion unit has a reasonable structural design. Fan-shaped plate one, fan-shaped plate two, and fan-shaped plate three are all made by laser cutting process to complete the pressing block. Then, screws are used to attach and fix the three together. The processing is convenient, the cycle is short, and the cost is low. It is especially suitable for the assembly and processing of small and medium batch filter cylinder components. The circular hole cavity formed by the circular hole section one, circular hole section two, and split pressing ring plate has good compatibility with the filter cylinder with hexagonal ring connector installed at the open end. This further ensures that the edge of the filter cylinder is pressed and stable on the hexagonal ring connector.

[0016] 3. The thickness of the first sector-shaped plate is 15-25mm, the thickness of the second sector-shaped plate is 1mm, and the thickness of the third sector-shaped plate is 8-15mm. The radial height of the arc-shaped pressing head formed by the inner edge of the second sector-shaped plate protruding from the concave side of the corresponding first sector-shaped plate is 0.5-0.8mm. The thickness of the first, second, and third sector-shaped plates is reasonably designed to ensure good fit when the filter cylinder is inserted and installed inside the round hole cavity. The 1mm thickness of the second sector-shaped plate allows its inner arc-shaped pressing head to press the edge of the filter cylinder opening well into the circumferential groove on the hexagonal ring connector, forming a uniformly wide circumferential flange.

[0017] 4. The concave edge of the arc-shaped pressing plate head is designed with a rounded chamfer. When the split pressing ring plate formed by the arc-shaped pressing plate heads on several fan-shaped pressing units presses the edge of the filter cylinder opening end into the circumferential groove on the hexagonal ring connector, the rounded chamfer structure effectively avoids hard pressure damage to the edge of the filter cylinder opening end, ensuring the safety of the filter cylinder and the hexagonal ring connector when they are pressed together to form a filter cylinder assembly.

[0018] 5. The fan-shaped extrusion unit is welded and fixed to the chuck of the lathe. The installation method is simple, which ensures that the crimping tooling of this utility model can be successfully prepared and implemented.

[0019] 6. The lathe is equipped with a foot pedal controller connected to the control system. During use, the pressing process of the filter cylinder assembly can be controlled by stepping on the foot pedal controller, further improving the ease of operation. Attached Figure Description

[0020] Figure 1 This is a perspective view of a filter cylinder assembly in the background art;

[0021] Figure 2 This is a cross-sectional view of a filter cylinder assembly along the axial direction in the background art;

[0022] Figure 3 yes Figure 2 A magnified view of a section at point S1;

[0023] Figure 4 This is a perspective view of a crimping fixture for a filter cylinder assembly in a railway locomotive hydraulic system according to the present invention.

[0024] Figure 5 yes Figure 4 A magnified view of a section at point S2;

[0025] Figure 6 It is an assembly diagram showing the relationship between the extrusion die assembly and the jaws;

[0026] Figure 7 This is a split view of the extrusion die assembly;

[0027] Figure 8 This is a three-dimensional view of the right front side of the extrusion die assembly;

[0028] Figure 9 This is an assembly diagram of the filter cylinder assembly on the extrusion die assembly;

[0029] Figure 10 This is an initial diagram showing the usage status of the extrusion die assembly;

[0030] Figure 11 This is a longitudinal sectional view along the axis direction, showing the initial usage state of the extrusion die assembly.

[0031] Figure 12 yes Figure 11 A magnified view of a section at point S3;

[0032] Figure 13 This is a diagram showing the mold closing state of the extrusion die assembly in use;

[0033] Figure 14 It is a longitudinal sectional view along the axis of the die assembly in use and mold closing state.

[0034] Figure 15 yes Figure 14 A magnified view of a section at S4.

[0035] In the diagram: A, filter cylinder; B, base plate; C, hexagonal ring connector; A-1, circumferential flange; C-1, external hexagonal ring; C-2, straight pipe section; C-3, circumferential groove; 1, lathe; 2, sector-shaped extrusion unit; 3, round hole storage cavity; 1-1, chuck; 1-2, chuck jaw; 1-3, foot pedal controller; 2-1, sector-shaped plate one; 2-2, sector-shaped plate two; 2-2a, arc-shaped crimping plate head; 2-3, sector-shaped plate three; 2-4, screw; 3-1, round hole section one; 3-2, split-type crimping ring plate; 3-3, round hole section two. Detailed Implementation

[0036] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0037] Example

[0038] like Figures 4-8As shown, this utility model is a crimping tool for a filter cylinder assembly in a railway locomotive hydraulic system. It includes a lathe 1 and an extrusion die assembly. The lathe 1 has a chuck 1-1 and several jaws 1-2 radially slidably mounted on the outer surface of the chuck 1-1. The extrusion die assembly is formed by assembling several fan-shaped extrusion units 2 circumferentially distributed on the same circumferential plane. The center of the circumferential plane enclosed by the fan-shaped extrusion units 2 forms a circular cavity 3 for inserting and installing the filter cylinder A on the filter cylinder assembly. The fan-shaped extrusion unit 2 has an arc-shaped pressing plate head 2-2a protruding from the concave side of the circular hole storage cavity 3, which has the same curvature as the arc. The arc-shaped pressing plate heads 2-2a on several fan-shaped extrusion units 2 surround to form a split pressing ring plate 3-2 for pressing the outer periphery of the free end of the filter cylinder A inserted into the circular hole storage cavity 3 onto the circumferential groove C-3 located on the hexagonal ring connector C inside it, forming a circumferential flange A-1. Several fan-shaped extrusion units 2 are fixedly installed on several claws 1-2 in a corresponding manner.

[0039] Preferably, the fan-shaped extrusion unit 2 includes fan-shaped plates 2-1, 2-2, and 3-3 arranged in sequence and fitted together, and the three are fixedly connected as one unit by screws 2-4 passing through the corresponding mounting holes. The concave sides of the fan-shaped plates 2-1 on the fan-shaped extrusion unit 2 enclose a circular hole segment 3-1. The inner edge of the fan-shaped plate 2-2 protrudes from the concave side of the corresponding fan-shaped plate 2-1 to form an arc-shaped pressing head 2-2a located at one end of the circular hole segment 3-1. The concave sides of the fan-shaped plates 3-3 on the fan-shaped extrusion unit 2 enclose a circular hole segment 3-3. The circular hole cavity 3 is formed by the combination of the first hole segment 3-1, the several arc-shaped pressing plate heads 2-2a, and the second circular hole segment 3-3. When the several fan-shaped pressing units 2 move to the inner limit position: the first circular hole segment 3-1 fits snugly with the filter cylinder A on the filter cylinder assembly; the second circular hole segment 3-2 presses the outer periphery of the free end of the filter cylinder A into the circumferential groove C-3 located on the inner hexagonal ring joint C; the inner diameter of the second circular hole segment 3-3 is greater than the outer diameter of the outer hexagonal ring C-1 on the filter cylinder assembly; and the outer hexagonal ring C-1 on the filter cylinder assembly is embedded in the second circular hole segment 3-3.

[0040] More preferably, the thickness of the first sector plate 2-1 ranges from 15 to 25 mm, the thickness of the second sector plate 2-2 is 1 mm, the thickness of the third sector plate 2-3 ranges from 8 to 15 mm, and the radial height of the arc-shaped pressing head 2-2a formed by the inner end edge of the second sector plate 2-2 protruding from the concave side of the corresponding first sector plate 2-1 is h = 0.5 to 0.8 mm (see Appendix). Figure 15 ).

[0041] More preferably, the edge of the concave arc end of the arc-shaped pressing plate head 2-2a is set as a rounded chamfer structure.

[0042] More preferably, the outer flange surfaces of the three fan-shaped plates 2-1, 2-2, and 2-3 located on the same fan-shaped extrusion unit 2 are flush, and the outer flange surface of the fan-shaped extrusion unit 2 is welded and fixed to the inner concave side surface of the corresponding claw 1-2.

[0043] More preferably, the lathe 1 is equipped with a foot pedal controller 1-3 connected to the control system.

[0044] The working principle of the crimping tool for filter cylinder assemblies in the hydraulic system of railway locomotives according to this utility model is as follows:

[0045] When the crimping fixture of this utility model is in its initial state, the several fan-shaped extrusion units 2 are in a certain expanded state. At this time, the inner diameter of the circular hole segment 3-1 in the circular hole cavity 3 formed by the centers of the several fan-shaped extrusion units 2 is slightly larger than the outer diameter of the filter cylinder A (see Appendix). Figure 6 and attached Figure 8 The base plate B has been pre-welded to one end of the filter cylinder A. The operator inserts the straight pipe section C-2 of the hexagonal ring connector C into the other end of the filter cylinder A, and makes the outer hexagonal ring C-1 abut against the end edge of the corresponding end of the filter cylinder A, completing the pre-positioning assembly of the hexagonal ring connector C and the filter cylinder A. The filter cylinder A with the hexagonal ring connector C assembled is inserted into the round hole cavity 3 of the crimping fixture of this utility model, and the filter cylinder A is inserted into the round hole section 3-1, and the outer hexagonal ring C-1 is embedded in the round hole section 3-3 and abuts against the split crimping ring plate 3-2 (see Appendix). Figures 9-12 The operator starts the lathe 1 by stepping on the foot pedal controller 1-3. Several jaws 1-2 drive the corresponding fan-shaped extrusion units 2 to move inward to their limit positions. At this time, the adjacent two sides of the fan-shaped extrusion units 2 are pressed together, the inner circumferential side of the circular hole section 3-1 is pressed together with the outer circumferential side of the filter cylinder A, and the split-type pressing ring plate 3-2 presses the outer circumferential edge of the free end of the filter cylinder A into the circumferential groove C-3 located on the hexagonal ring joint C inside it, forming a circumferential flange A-1. Thus, the end edge of the filter cylinder A away from the bottom plate B is pressed and fixed on the hexagonal ring joint C (see Appendix). Figures 13-15 This completes one cycle of assembly and pressing of a filter cylinder assembly.

[0046] This utility model discloses a crimping fixture for a filter cylinder assembly in a railway locomotive hydraulic system. In use, a hexagonal ring connector is inserted into the open end of the filter cylinder via a straight pipe section. Then, the filter cylinder with the hexagonal ring connector installed is inserted into the circular cavity formed by several expanded fan-shaped extrusion units. When the lathe is started, the chuck moves the fan-shaped extrusion units inward to a preset limit position. At this point, the fan-shaped extrusion units tighten and press the edge of the filter cylinder's open end into the circumferential groove on the hexagonal ring connector. The current semi-automatic assembly and processing of filter cylinder components offers excellent overall ease of operation. The entire product assembly and processing cycle is approximately 15 seconds, with high pressing efficiency and stable product pressing quality, significantly improving the product qualification rate. It only requires the self-made production of a few fan-shaped extrusion units, which significantly reduces equipment development costs and shortens the equipment development cycle compared to machine tool processing methods that require mold making and the manufacture of rolling tools. It is suitable for the assembly and processing of small to medium batches of filter cylinder components. The overall structural design is ingenious and reasonable, with good compatibility with lathe chucks and jaws, making its application and implementation highly feasible.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A crimping tool for a filter screen cylinder assembly in a railway locomotive hydraulic system, characterized in that, The assembly includes a lathe (1) and an extrusion die assembly. The lathe (1) has a chuck (1-1) and several jaws (1-2) that are radially and circumferentially slidably mounted on the outer end of the chuck (1-1). The extrusion die assembly is formed by assembling several fan-shaped extrusion units (2) circumferentially distributed on the same circumferential plane. The center of the same circumferential plane enclosed by the several fan-shaped extrusion units (2) forms a circular cavity (3) for inserting and installing the filter cylinder (A) on the filter cylinder assembly. The fan-shaped extrusion units (2) face the circular cavity (3). 3) The concave side protrudes with an arc-shaped pressing plate head (2-2a) with the same curvature. The arc-shaped pressing plate heads (2-2a) on several of the fan-shaped pressing units (2) surround to form a split pressing ring plate (3-2) for pressing the outer periphery of the filter cylinder (A) inserted into the round hole storage cavity (3) to the circumferential groove (C-3) on the hexagonal ring connector (C) inside it and forming a circumferential flange (A-1). Several of the fan-shaped pressing units (2) are fixedly installed on several of the claws (1-2) one by one.

2. The crimping fixture for a filter cylinder assembly in a railway locomotive hydraulic system as described in claim 1, characterized in that, The fan-shaped extrusion unit (2) includes fan-shaped plates one (2-1), two (2-2), and three (2-3) arranged in sequence and fitted together. The three are fixedly connected as one unit by screws (2-4) passing through the corresponding mounting holes. The concave side surfaces of the fan-shaped plates one (2-1) on several fan-shaped extrusion units (2) enclose a circular hole segment one (3-1). The inner edge of the fan-shaped plate two (2-2) protrudes from the concave side surface of the corresponding fan-shaped plate one (2-1) to form the arc-shaped pressing plate head (2-2a) located at one end of the circular hole segment one (3-1). The concave side surfaces of the fan-shaped plates three (2-3) on several fan-shaped extrusion units (2) enclose a circular hole segment two (3-3). The circular hole segment one (3-1) A split-type pressing ring plate (3-2) formed by several arc-shaped pressing plate heads (2-2a) and a circular hole section two (3-3) formed a circular hole storage cavity (3). When several fan-shaped extrusion units (2) move to the inner limit position: the circular hole section one (3-1) fits properly with the filter cylinder (A) on the filter cylinder assembly. The split-type pressing ring plate (3-2) presses the outer periphery of the free end of the filter cylinder (A) into the circumferential groove (C-3) on the hexagonal ring joint (C) inside it. The inner diameter of the circular hole section two (3-3) is greater than the outer diameter of the outer hexagonal ring (C-1) on the filter cylinder assembly. The outer hexagonal ring (C-1) on the filter cylinder assembly is embedded in the circular hole section two (3-3).

3. The crimping fixture for a filter cylinder assembly in a railway locomotive hydraulic system as described in claim 2, characterized in that, The thickness of the first sector plate (2-1) is 15-25 mm, the thickness of the second sector plate (2-2) is 1 mm, the thickness of the third sector plate (2-3) is 8-15 mm, and the radial height of the arc-shaped pressing head (2-2a) formed by the inner edge of the second sector plate (2-2) protruding from the concave side of the corresponding first sector plate (2-1) is 0.5-0.8 mm.

4. The crimping fixture for a filter cylinder assembly in a railway locomotive hydraulic system as described in claim 3, characterized in that, The concave arc end of the arc-shaped pressing plate head (2-2a) is designed with a rounded chamfered structure.

5. The crimping fixture for a filter cylinder assembly in a railway locomotive hydraulic system as described in claim 4, characterized in that, The outer flanges of the three fan-shaped plates (2-1), (2-2), and (2-3) located on the same fan-shaped extrusion unit (2) are flush, and the outer flange of the fan-shaped extrusion unit (2) is welded and fixed to the inner concave side of the corresponding claw (1-2).

6. The crimping tool for a filter cylinder assembly in a railway locomotive hydraulic system as described in any one of claims 1 to 5, characterized in that, The lathe (1) is equipped with a foot pedal controller (1-3) connected to the control system.

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