Hydraulic expansion sleeve processing method and hydraulic expansion sleeve

Abstract

This invention discloses a method for processing a hydraulic expansion sleeve and a hydraulic expansion sleeve, belonging to the technical field of hydraulic expansion sleeves. The hydraulic expansion sleeve includes an inner sleeve and an outer sleeve. The first end of the inner sleeve extends radially outward and has a first edge. The first end of the outer sleeve has a protruding ring, and the inner side of the first end of the outer sleeve has a first stepped groove adapted to the first edge. An annular oil cavity is formed between the outer side wall of the inner sleeve and the inner side wall of the outer sleeve. The protruding ring has an oil injection channel and an adjustment channel respectively communicating with the annular oil cavity. The processing method includes: welding the outer peripheral side wall of the first edge to the side wall of the first stepped groove; and welding the second end of the outer sleeve and the second end of the inner sleeve. By setting the first edge and the first stepped groove, the welding position at one end is radially offset outward to a position away from the annular oil cavity, making it less prone to cracking at the welding position and improving the quality of the hydraulic expansion sleeve.

Description

Technical Field

[0001] This invention relates to the field of hydraulic expansion sleeve technology, and particularly to a hydraulic expansion sleeve processing method and a hydraulic expansion sleeve. Background Technology

[0002] A hydraulic expansion sleeve is a type of coupling that uses hydraulic coupling. A coupling is a connecting structure that connects the driving end of a power source to the transmission end of machinery or equipment. The hydraulic expansion sleeve has an annular oil chamber inside; deformation is achieved by controlling the oil pressure within the annular chamber, thereby connecting the shaft components.

[0003] When manufacturing hydraulic expansion sleeves, it is generally necessary to make an outer sleeve and an inner sleeve separately. The two ends of the outer sleeve and the inner sleeve are welded together to form an annular oil cavity structure. However, during the welding process, because the welding position is at the end of the annular oil cavity, cracks are prone to occur at the welding position, which affects the product quality. Summary of the Invention

[0004] The purpose of this invention is to provide a hydraulic expansion sleeve processing method and a hydraulic expansion sleeve, so as to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0005] A technical solution adopted to solve the above-mentioned technical problems is a method for processing a hydraulic expansion sleeve. The hydraulic expansion sleeve includes an inner sleeve and an outer sleeve. The first end of the inner sleeve extends radially outward and is provided with a first edge. The first end of the outer sleeve is provided with a convex ring. The inner side of the first end of the outer sleeve is provided with a first stepped groove adapted to the first edge. An annular oil cavity is formed between the outer side wall of the inner sleeve and the inner side wall of the outer sleeve. The convex ring is provided with an oil injection channel and an adjustment channel respectively communicating with the annular oil cavity. The processing method includes: welding the outer peripheral side wall of the first edge to the side wall of the first stepped groove; and welding the second end of the outer sleeve and the second end of the inner sleeve together.

[0006] The technical solution has at least the following beneficial effects: by setting the first edge and the first stepped groove, the welding position at one end is radially shifted outward to a position away from the annular oil cavity, making it less likely for cracks to form at the welding position and improving the quality of the hydraulic expansion sleeve.

[0007] As a further improvement to the above technical solution, the outer side of the second end of the inner sleeve is provided with an offset groove along the radial direction; the second end of the outer sleeve is provided with an offset protrusion that is adapted to fit the offset groove, the radial thickness of the offset protrusion is greater than the radial thickness of the annular oil cavity, and the radial depth of the offset groove is equal to the radial thickness of the offset protrusion minus the radial thickness of the annular oil cavity. The welding connection between the second end of the outer sleeve and the second end of the inner sleeve includes: The inner peripheral sidewall of the offset protrusion is welded to the sidewall of the offset groove.

[0008] As a further improvement to the above technical solution, the second end of the outer sleeve is provided with an offset protrusion extending radially toward the inner sleeve. The radial thickness of the offset protrusion is the same as the radial thickness of the annular oil cavity. The mating welding surface of the offset protrusion in contact with the inner sleeve is set as an inclined surface, so that the weld between the second end of the outer sleeve and the second end of the inner sleeve is offset toward the center line of the inner sleeve. The welding connection between the second end of the outer sleeve and the second end of the inner sleeve includes: The inner peripheral sidewall of the offset convex edge is welded to the outer sidewall of the inner sleeve.

[0009] As a further improvement to the above technical solution, the second end of the inner sleeve is provided with an offset protrusion extending radially toward the outer sleeve. The radial thickness of the offset protrusion is the same as the radial thickness of the annular oil cavity. The mating welding surface of the offset protrusion in contact with the outer sleeve is set as an inclined surface, so that the weld seam of the second end of the outer sleeve and the second end of the inner sleeve is offset toward the center line of the inner sleeve, and the offset amount is greater than the radial thickness of the annular oil cavity. The welding connection of the second end of the outer sleeve and the second end of the inner sleeve includes: The outer peripheral sidewall of the offset convex edge is welded to the inner sidewall of the outer jacket.

[0010] As a further improvement to the above technical solution, multiple annular pressure grooves distributed along the axis are formed on the outer side wall of the inner sleeve at the position corresponding to the annular oil cavity.

[0011] As a further improvement to the above technical solution, an annular pressing edge is provided on the inner side wall of the outer jacket at the position corresponding to the annular pressing groove.

[0012] As a further improvement to the above technical solution, the length of the annular pressing edge on the axis is less than the length of the annular pressing groove on the axis.

[0013] As a further improvement to the above technical solution, the processing method includes: Assemble and secure the relative positions of the inner sleeve and the outer sleeve; Preheat the inner sleeve and the outer sleeve; In a vacuum environment, a vacuum electron beam is used to weld the outer peripheral sidewall of the first edge to the sidewall of the first stepped groove, and to weld the second end of the outer sleeve to the second end of the inner sleeve.

[0014] As a further improvement to the above technical solution, the processing method includes: After the outer sleeve and the inner sleeve are welded together, they are connected to form the first semi-finished product. The first semi-finished product is subjected to vacuum heating treatment, and after the vacuum heating treatment is completed, it is subjected to high-temperature tempering and then vacuum oil quenching cooling.

[0015] A second technical solution is also provided: a hydraulic expansion sleeve, which is manufactured using any of the hydraulic expansion sleeve processing methods described above. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the overall structure of the hydraulic expansion sleeve in Embodiment 1 of the present invention; Figure 2 This is an exploded structural diagram of the hydraulic expansion sleeve in Embodiment 1 of the present invention; Figure 3 This is a schematic diagram of the radial cross-sectional structure of the hydraulic expansion sleeve in Embodiment 1 of the present invention; Figure 4 This is a schematic diagram of the axial cross-sectional structure of the hydraulic expansion sleeve in Embodiment 1 of the present invention; Figure 5 for Figure 4 A schematic diagram of the mating welding surfaces of the inner and outer sleeves at the second end, shown at point A in the diagram; Figure 6 This is a schematic diagram of the mating welding surfaces of the inner sleeve and outer sleeve at the second end in Embodiment 2 of the present invention; Figure 7 This is a schematic diagram of the mating welding surface of the inner sleeve and outer sleeve at the second end in Embodiment 3 of the present invention; Figure 8 This is a schematic diagram of the mating welding surface of the inner sleeve and outer sleeve at the second end in Embodiment 4 of the present invention.

[0017] 100 Inner sleeve; 110 First edge; 200 Outer sleeve; 210 First stepped groove; 220 Convex ring; 221 Sealing plug; 222 Steel ball; 223 Piston; 224 Pressure adjusting screw; 300 Annular oil cavity; 410 Offset groove; 420 Offset convex edge; 430 Mating welding surface; 510 Annular pressure groove; 520 Annular pressure edge. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0022] Example 1: Reference Figure 1-5 As shown, the hydraulic expansion sleeve includes an inner sleeve 100 and an outer sleeve 200. The inner sleeve 100 and the outer sleeve 200 are coaxially arranged and interlocked, and the two ends of the inner sleeve 100 and the outer sleeve 200 along the axis are respectively referred to as the first end and the second end.

[0023] A protruding ring 220 extends outward from the outer periphery of the first end of the outer sleeve 200, and the protruding ring 220 is integrally formed with the outer sleeve 200. A first stepped groove 210 is formed on the inner periphery of the first end of the outer sleeve 200. A first edge 110 extends outward from the outer periphery of the first end of the inner sleeve 100. The radial thickness of the first edge 110 is the same as the radial depth of the first stepped groove 210, and the axial length of the first edge 110 is the same as the axial length of the first stepped groove 210. An offset protruding edge 420 extends radially inward from the inner side of the second end of the outer sleeve 200. When the inner sleeve 100 and the outer sleeve 200 are nested together, the first edge 110 fits into the first stepped groove 210, and a closed annular oil cavity 300 is formed between the inner wall of the outer sleeve 200 and the outer wall of the inner sleeve 100. It can be understood that at this time, the radial thickness of the offset protruding edge 420 is equal to the radial thickness of the annular oil cavity 300.

[0024] The convex ring 220 is provided with an oil injection channel and an adjustment channel. The oil injection channel is connected to the annular oil chamber 300 and is used to inject pressurized oil into the annular oil chamber 300. After injection, a steel ball 222 and a sealing plug 221 are installed in the oil injection channel for sealing. A plunger 223 is slidably installed in the adjustment channel and a pressure adjusting screw 224 is threaded on. By rotating the pressure adjusting screw 224, the plunger 223 is pushed to slide, thereby adjusting the oil pressure in the annular oil chamber 300 and achieving tightening after deformation.

[0025] A method for machining a hydraulic expansion sleeve is provided, comprising the following steps: First step: Purchase materials (material qualification certificate).

[0026] The second step: develop the process (feasibility analysis).

[0027] Third step: CNC integrated machine (rough turning).

[0028] Step 4: CNC machining center (rough milling, drilling, tapping).

[0029] Fifth step: Assembly.

[0030] Step 6: Welding (laser or vacuum electron beam).

[0031] Step 7: Ultrasonic inspection of the weld.

[0032] Step 8: Vacuum heat treatment.

[0033] Step 9: Finishing.

[0034] Step 10: Assemble the parts.

[0035] Step 10: After passing the test, the packaged goods are put into storage.

[0036] Specifically, in the sixth step of this embodiment, the process flow using a vacuum electron beam includes: First step: Clean the parts (at least the inner sleeve 100 and the outer sleeve 200) with alcohol until the oil stains are gone; The second step: Blow clean the parts; The third step: demagnetization treatment of the inner and outer covers; Fourth step: Assemble the inner and outer covers; Fifth step: Preparation of the vacuum electron beam equipment; Step 6: Use tooling fixtures to determine the relative positions of the inner and outer sleeves; Step 7: Preheat the inner and outer covers (to a certain temperature); Step 8: Vacuum treatment of the welding environment; Ninth step: Use a vacuum electron beam device to weld the two ends of the inner and outer sleeves together; Step 10: Release the vacuum in the welding environment and remove the part (first semi-finished product) after it has cooled naturally.

[0037] Specifically, the ninth sub-step includes using a vacuum electron beam in a vacuum environment to weld the outer peripheral sidewall of the first edge 110 to the sidewall of the first stepped groove, and to weld the second end of the outer sleeve 200 and the second end of the inner sleeve 100 together.

[0038] Vacuum electron beam welding (EBW) is a fusion welding method that uses a high-energy electron beam as a heat source. It belongs to the field of materials science and technology, specifically welding and joining techniques. This technology generates electrons through thermoemission or field emission cathodes, which are accelerated by a 30–150 kV high-voltage electric field to form a high-speed electron beam (0.3–0.8 times the speed of light). This beam is then focused by an electromagnetic lens and bombards the workpiece surface, converting kinetic energy into heat energy to achieve metal fusion. The welding process must be carried out in a vacuum environment, and is classified into three types based on the degree of vacuum: high vacuum, medium vacuum, and non-vacuum.

[0039] It is understandable that by setting the first edge 110 and the first stepped groove 210, the welding position at this end is radially offset outward to a position away from the annular oil cavity 300, making it less prone to cracking at the welding position and effectively improving the quality of the hydraulic expansion sleeve. It should be noted that in this embodiment, the gap between the second end of the outer sleeve 200 and the second end of the inner sleeve 100 is the outer peripheral edge of the second end of the inner sleeve 100. When the second end of the outer sleeve 200 and the second end of the inner sleeve 100 are welded, the inner peripheral sidewall of the offset protrusion 420 is welded to the outer peripheral sidewall of the inner sleeve 100.

[0040] Furthermore, the eighth step includes: after the outer sleeve 200 and the inner sleeve 100 are welded together to form the first semi-finished product, after the weld is inspected for qualification by ultrasonic testing, the first semi-finished product is subjected to vacuum heating treatment, and after the vacuum heating treatment is completed, it is subjected to high-temperature tempering and then vacuum oil quenching cooling.

[0041] The hydraulic expansion sleeve obtained through the above process has a more stable and reliable quality.

[0042] For example, vacuum heat treatment process parameters include: pre-evacuating the heating furnace before heating, with a vacuum degree of -3 to -4 Pa; heating temperature of 850 to 880°C; holding time calculated based on the effective thickness of the workpiece, typically 1–2 hours / 25 mm; for small parts (such as φ20 mm × 200 mm), 30–40 minutes; high-temperature tempering temperature of 500 to 600°C; cooling using vacuum oil quenching; and hardness HRC of 35 to 40.

[0043] This embodiment also provides a hydraulic expansion sleeve manufactured using the above-described hydraulic expansion sleeve processing method.

[0044] Example 2: Reference Figure 6 The difference between this embodiment and embodiment one is that the welding structure of the inner sleeve 100 and the outer sleeve 200 at the second end is different. In this embodiment, the outer edge of the second end of the inner sleeve 100 is provided with an offset groove 410 along the radial direction. The radial thickness of the offset protrusion 420 is greater than the radial thickness of the annular oil cavity 300, and the radial thickness of the offset groove 410 is equal to the radial thickness of the offset protrusion 420 minus the radial thickness of the annular oil cavity 300, so that when the inner sleeve 100 and the outer sleeve 200 are adapted and nested, the offset protrusion 420 can be adapted and fitted into the offset groove 410.

[0045] Specifically, in the ninth step, the second end of the outer sleeve 200 and the second end of the inner sleeve 100 are welded together, that is, the inner peripheral sidewall of the offset protrusion 420 is welded to the sidewall of the offset groove 410. This causes the weld to deviate from the design direction towards the centerline of the inner sleeve 100, further reducing the occurrence of cracks and improving the overall quality of the hydraulic expansion sleeve.

[0046] Furthermore, in the fourth step, multiple annular pressure grooves 510 are formed on the outer wall of the inner sleeve 100 at positions corresponding to the annular oil cavity 300. These annular pressure grooves 510 are arranged side-by-side along the axial direction of the inner sleeve 100. When the oil pressure within the annular oil cavity 300 reaches a certain level, the inner sleeve 100 deforms differently at the positions of the annular pressure grooves 510, resulting in force concentration. This causes a large local gripping force to be formed at the positions of the annular pressure grooves 510 on the inner wall of the inner sleeve 100, making it suitable for connecting relatively smooth shafts, reducing slippage, and increasing the maximum theoretical torque that can be withstood.

[0047] Furthermore, in the fourth step, an annular pressing edge 520 is provided on the inner side wall of the outer sleeve 200 at the position corresponding to the annular pressing groove 510. The axial length of the annular pressing edge 520 on the axis of the outer sleeve 200 is less than the axial length of the annular pressing groove 510 on the axis of the inner sleeve 100, so as to prevent the pressure oil from getting stuck and also reduce the amount of pressure oil.

[0048] Example 3: Reference Figure 7The difference between this embodiment and Embodiment 1 lies in the welding structure of the inner sleeve 100 and the outer sleeve 200 at the second end. In this embodiment, the radial thickness of the offset protrusion 420 at the contact position with the annular oil cavity 300 is the same as the radial thickness of the annular oil cavity 300. The mating welding surface 430 where the offset protrusion 420 contacts the outer periphery of the second end of the inner sleeve 100 is set as an inclined surface, and the welding direction is parallel to the mating welding surface 430 during welding. At this time, the end face welds of the second end of the outer sleeve 200 and the second end of the inner sleeve 100 are offset towards the centerline direction of the inner sleeve 100.

[0049] Specifically, in the ninth step, the second end of the outer sleeve 200 and the second end of the inner sleeve 100 are welded together, that is, the inner circumferential sidewall of the offset protrusion 420 is welded to the outer sidewall of the inner sleeve 100. This causes the weld seam on the end face to deviate from the design and tilt towards the centerline of the inner sleeve 100, further reducing the occurrence of cracks and improving the overall quality of the hydraulic expansion sleeve.

[0050] Furthermore, in the fourth step, multiple annular pressure grooves 510 are formed on the outer wall of the inner sleeve 100 at positions corresponding to the annular oil cavity 300. These annular pressure grooves 510 are arranged side-by-side along the axial direction of the inner sleeve 100. When the oil pressure within the annular oil cavity 300 reaches a certain level, the inner sleeve 100 deforms differently at the positions of the annular pressure grooves 510, resulting in force concentration. This causes a large local gripping force to be formed at the positions of the annular pressure grooves 510 on the inner wall of the inner sleeve 100, making it suitable for connecting relatively smooth shafts, reducing slippage, and increasing the maximum theoretical torque that can be withstood.

[0051] Furthermore, in the fourth step, an annular pressing edge 520 is provided on the inner side wall of the outer sleeve 200 at the position corresponding to the annular pressing groove 510. The axial length of the annular pressing edge 520 on the axis of the outer sleeve 200 is less than the axial length of the annular pressing groove 510 on the axis of the inner sleeve 100, which prevents the pressure oil from stagnating and storing bubbles, and also reduces the amount of pressure oil.

[0052] Example 4: Reference Figure 8 The difference between this embodiment and Embodiment 1 lies in the welding structure of the inner sleeve 100 and the outer sleeve 200 at their second ends. In this embodiment, the second end of the outer sleeve 200 does not have an offset protrusion 420, while the outer periphery of the second end of the inner sleeve 100 has an offset protrusion 420. The radial thickness of the offset protrusion 420 at the contact point with the annular oil cavity 300 is the same as the radial thickness of the annular oil cavity 300. The mating welding surface 430 where the offset protrusion 420 contacts the inner periphery of the second end of the outer sleeve 200 is set as an inclined surface, and the welding direction is parallel to the mating welding surface 430 during welding. At this time, the end face welds of the second ends of the outer sleeve 200 and the second ends of the inner sleeve 100 are offset towards the centerline of the inner sleeve 100, and the amount of radial offset is greater than the radial thickness of the annular oil cavity 300.

[0053] Specifically, in the ninth step, the second end of the outer sleeve 200 and the second end of the inner sleeve 100 are welded together, that is, the outer peripheral sidewall of the offset protrusion 420 is welded to the inner sidewall of the outer sleeve 200. This causes the weld seam on the end face to deviate from the design and tilt towards the centerline of the inner sleeve 100, further reducing the occurrence of cracks and improving the overall quality of the hydraulic expansion sleeve.

[0054] Furthermore, in the fourth step, multiple annular pressure grooves 510 are formed on the outer wall of the inner sleeve 100 corresponding to the annular oil cavity 300. These annular pressure grooves 510 are arranged side-by-side along the axial direction of the inner sleeve 100. When the oil pressure in the annular oil cavity 300 reaches a certain level, the inner sleeve 100 deforms differently at the positions of the annular pressure grooves 510, resulting in concentrated force. This causes a large local gripping force to be formed at the positions of the annular pressure grooves 510 on the inner wall of the inner sleeve 100, making it suitable for connecting relatively smooth shafts, reducing slippage, and increasing the maximum theoretical torque that can be withstood. It should be noted that in this embodiment, an annular pressure edge 520 is not provided.

[0055] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A method of hydraulic expansion sleeve machining, characterized by, The hydraulic expansion sleeve includes an inner sleeve and an outer sleeve. The inner sleeve has a first edge extending radially outward from its first end. The outer sleeve has a convex ring at its first end, and a first stepped groove adapted to the first edge is provided on the inner side of the first end of the outer sleeve. An annular oil cavity is formed between the outer wall of the inner sleeve and the inner wall of the outer sleeve. The convex ring has an oil injection channel and an adjustment channel respectively communicating with the annular oil cavity. The processing method includes: The outer peripheral sidewall of the first edge is welded to the sidewall of the first stepped groove. The second end of the outer sleeve and the second end of the inner sleeve are welded together.

2. The method of claim 1, wherein: The inner sleeve has a radially offset groove on its outer side at the second end; the outer sleeve has an offset protrusion at the second end that fits into the offset groove, the radial thickness of the offset protrusion being greater than the radial thickness of the annular oil cavity, and the radial depth of the offset groove being equal to the radial thickness of the offset protrusion minus the radial thickness of the annular oil cavity. The welding connection between the second end of the outer sleeve and the second end of the inner sleeve includes: The inner peripheral sidewall of the offset protrusion is welded to the sidewall of the offset groove.

3. The method of claim 1, wherein: The second end of the outer sleeve is provided with an offset protrusion extending radially toward the inner sleeve. The radial thickness of the offset protrusion is the same as the radial thickness of the annular oil cavity. The mating welding surface of the offset protrusion in contact with the inner sleeve is set as an inclined surface, so that the weld between the second end of the outer sleeve and the second end of the inner sleeve is offset toward the center line of the inner sleeve. The welding connection between the second end of the outer sleeve and the second end of the inner sleeve includes: The inner peripheral sidewall of the offset convex edge is welded to the outer sidewall of the inner sleeve.

4. The method of claim 1, wherein: The second end of the inner sleeve is provided with an offset protrusion extending radially toward the outer sleeve. The radial thickness of the offset protrusion is the same as the radial thickness of the annular oil cavity. The mating welding surface of the offset protrusion in contact with the outer sleeve is set as an inclined surface, so that the weld between the second end of the outer sleeve and the second end of the inner sleeve is offset toward the center line of the inner sleeve, and the offset amount is greater than the radial thickness of the annular oil cavity. The welding connection between the second end of the outer sleeve and the second end of the inner sleeve includes: The outer peripheral sidewall of the offset convex edge is welded to the inner sidewall of the outer jacket.

5. The method of claim 1, wherein: Multiple annular pressure grooves distributed along the axis are formed on the outer wall of the inner sleeve at the position corresponding to the annular oil cavity.

6. The method of claim 5, wherein: An annular pressing edge is provided on the inner side wall of the outer jacket at the position corresponding to the annular pressing groove.

7. The method of claim 6, wherein: The length of the annular pressing edge on the axis is less than the length of the annular pressing groove on the axis.

8. The method for machining a hydraulic expansion sleeve according to claim 1, characterized in that: The processing method includes: Assemble and secure the relative positions of the inner sleeve and the outer sleeve; Preheat the inner sleeve and the outer sleeve; In a vacuum environment, a vacuum electron beam is used to weld the outer peripheral sidewall of the first edge to the sidewall of the first stepped groove, and to weld the second end of the outer sleeve to the second end of the inner sleeve.

9. The method for processing a hydraulic expansion sleeve according to claim 8, characterized in that: The processing method includes: After the outer sleeve and the inner sleeve are welded together, they are connected to form the first semi-finished product. The first semi-finished product is subjected to vacuum heating treatment, and after the vacuum heating treatment is completed, it is subjected to high-temperature tempering and then vacuum oil quenching cooling.

10. A hydraulic expansion sleeve, characterized in that: It is manufactured using the hydraulic expansion sleeve processing method described in any one of claims 1-9.

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