Self-adaptive clamp for machining sleeve parts

Abstract

The invention discloses a self-adaptive clamp for sleeve part machining, and relates to the technical field of machine tool machining clamp design, the self-adaptive clamp comprises a base and a supporting assembly, and the base is provided with an annular groove; the supporting assembly comprises a pre-tightening mechanism and a plurality of supporting pieces, the supporting pieces are all located in the annular groove, each supporting piece comprises a sleeve, an elastic piece and an abutting sliding block, the elastic pieces are located in the sleeves and elastically abut against the abutting sliding blocks, the abutting sliding blocks are arranged in the sleeves in a sliding mode, and the ends, away from the elastic pieces, of the abutting sliding blocks are provided with protruding parts; the protruding parts can stretch out of the sleeves under the action of the elastic pieces, and the pre-tightening mechanism is connected with the base and abuts against the sleeves of the supporting pieces so that the sleeves of the supporting pieces can abut against one another. The abutting sliding block of each supporting piece can independently stretch out and draw back under the action of the elastic piece, so that each protruding part can adapt to the unevenness of the end face of the workpiece, multi-point uniform contact supporting is achieved, and the machining error of the workpiece is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of machine tool machining fixture design technology, and specifically to an adaptive fixture for machining sleeve-type parts. Background Technology

[0002] In the field of mechanical manufacturing, sleeve-type parts are a typical type of hollow rotating parts, and their machining quality directly affects the accuracy and performance of the entire assembly. For shaft-type parts with center holes at both ends of the sleeve part, a "one-clamp, one-support" clamping method is usually used to fix the sleeve part, that is, one end of the sleeve part is clamped by a three-jaw self-centering chuck, and the other end of the sleeve part is supported by a support fixture to improve machining rigidity.

[0003] However, the end faces of many sleeve parts blanks (especially castings, forgings, or drawn tubes) are unmachined and uneven. When conventional flat support fixtures are used to position the end faces of sleeve parts blanks, the end faces of sleeve parts blanks can only contact the support surfaces of the support fixtures at a few higher points because the support surfaces of the support fixtures are rigid. The contact between the two is insufficient, forming an unstable contact state, which cannot provide a uniform and reliable axial positioning reference, resulting in large machining errors. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose an adaptive fixture for machining sleeve-type parts. This invention solves the technical problem in the prior art where the end face of the sleeve part blank is uneven, the bearing surface of the support fixture is a rigid surface, and the end face of the sleeve part blank can only contact the bearing surface of the support fixture at a few higher points, resulting in insufficient contact and an unstable contact state, which leads to large machining errors.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This invention provides an adaptive fixture for machining sleeve-type parts, comprising: The base has an annular groove; and A support assembly includes a pre-tightening mechanism and multiple support members, all of which are located in the annular groove. Each support member includes a sleeve, an elastic element, and a retaining slider. The elastic element is located inside the sleeve and elastically abuts against the retaining slider. The retaining slider is slidably disposed inside the sleeve, and one end of the retaining slider away from the elastic element has a protrusion. The protrusion can extend outside the sleeve under the action of the elastic element. The pre-tightening mechanism is connected to the base and abuts against the sleeve of the support member, so that the multiple sleeves of the multiple support members abut against each other.

[0006] In some embodiments, the support member further includes a snap-fit ​​member connected to the end of the sleeve away from the abutting slider, the snap-fit ​​member slidably snapping into the bottom of the annular groove.

[0007] In some embodiments, the bottom of the annular groove is provided with a sliding ring groove, and the sidewall of the snap-fit ​​member is provided with a snap-fit ​​groove along its peripheral side, the snap-fit ​​groove being slidably snapped into the sliding ring groove.

[0008] In some embodiments, the snap-fit ​​member has a positioning post on the side facing the elastic member, and the positioning post is inserted into the elastic member.

[0009] In some embodiments, the adaptive clamp further includes a limiting member disposed on the base and used to abut against the ends of a plurality of connected support members, the limiting member cooperating with the pre-tightening mechanism to abut against the plurality of support members.

[0010] In some embodiments, the pre-tightening mechanism includes a mounting member and an adjusting member. The mounting member is disposed on the base, and the adjusting member is threaded through the mounting member. The portion of the adjusting member that passes through the mounting member is capable of abutting against or disengaging from the ends of the plurality of supports away from the limiting member.

[0011] In some embodiments, the mounting member is arc-shaped and has a groove, and the adjusting member is threaded through one end extending into the groove and abuts against the ends of the plurality of supports away from the limiting member.

[0012] In some embodiments, the pre-tightening mechanism further includes a positioning nut, which is threaded onto the adjusting member and located on the side of the mounting member opposite to the groove.

[0013] In some embodiments, both ends of the mounting member are detachably connected to the base by screws.

[0014] In some embodiments, the adaptive clamp further includes a connecting handle, the base has a central hole, the connecting handle is inserted into the central hole and coaxially arranged with the central hole, and the outer wall of the connecting handle is frustoconical.

[0015] Compared with the prior art, the adaptive fixture for machining sleeve-type parts provided by the present invention has multiple support members distributed circumferentially along the annular groove of the base. The abutting slider of each support member can extend and retract independently under the action of the elastic element, so that each protrusion can adapt to the unevenness of the workpiece end face, realize multi-point uniform contact support, thereby providing a stable and reliable axial positioning reference for the workpiece and effectively reducing the machining error of the workpiece. At the same time, the multiple sleeves are abutted and fixed together by the pre-tightening mechanism to prevent displacement during the machining process and ensure support stability. In addition, the annular layout of multiple support members can cover sleeve-type parts within a certain diameter range, and can be adapted to parts of different specifications without changing the main structure of the fixture, thus having good versatility. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the end face structure of the adaptive fixture provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the adaptive clamp provided in this embodiment of the invention when the support component is not installed; Figure 3 yes Figure 2 Cross-sectional view along the AA direction; Figure 4 This is a schematic diagram of the structure of the base provided in an embodiment of the present invention; Figure 5 This is an exploded view of the support member provided in an embodiment of the present invention; Figure 6 This is a structural schematic diagram of the support member provided in an embodiment of the present invention; Figure 7 This is a cross-sectional schematic diagram of the support member provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure when the adaptive clamp provided in the embodiment of the present invention abuts against the end face of the sleeve part. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0018] To address the technical problem in existing technologies where the end face of sleeve part blanks is uneven, the supporting surface of the fixture is rigid, and the end face of the sleeve part blank can only contact the supporting surface of the fixture at a few higher points, resulting in insufficient and unstable contact and large machining errors, this invention provides an adaptive fixture for machining sleeve-type parts. This fixture can elastically abut against the end face of the workpiece with multiple protrusions, adapting to the unevenness of the workpiece end face and providing multi-point uniform contact support, thereby providing a stable and reliable axial positioning reference for the workpiece and effectively reducing machining errors.

[0019] It should be noted that the adaptive fixture for machining sleeve-type parts described in this invention is applicable to, but not limited to, sleeve-type parts. For ease of explanation, this invention will only use the application of the adaptive fixture for machining sleeve-type parts to sleeve-type parts as an example. The principle of the adaptive fixture for machining sleeve-type parts applied to other types of equipment is essentially the same as that applied to sleeve-type parts, and will not be elaborated here.

[0020] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of an adaptive fixture for machining sleeve-type parts according to an embodiment of the present invention. The adaptive fixture includes a base 1 and a support assembly 2. The base 1 has an annular groove 11. The support assembly 2 includes a pre-tightening mechanism 21 and multiple support members 22. The multiple support members 22 are all located in the annular groove 11. Each support member 22 includes a sleeve 221, an elastic member 222, and a retaining slider 223. The elastic member 222 is located inside the sleeve 221 and elastically abuts against the retaining slider 223. The retaining slider 223 is slidably disposed inside the sleeve 221, and the end of the retaining slider 223 away from the elastic member 222 has a protrusion 224. The protrusion 224 can extend out of the sleeve 221 under the action of the elastic member. The pre-tightening mechanism 21 is connected to the base 1 and abuts against the sleeve 221 of the support member 22, so that the multiple sleeves 221 of the multiple support members 22 abut against each other.

[0021] In this embodiment, the base 1 can be made of high-strength cast iron or alloy steel. The top of the base 1 has an opening and an annular groove 11 inside. The annular groove 11 can communicate with the outside of the base 1 through the opening. The number of multiple support members 22 is not limited, for example... Figure 1 The annular groove 11 of the embodiment shown is equipped with nine support members 22. The specific number of support members 22 can be determined according to the size of the end face of the sleeve to be processed.

[0022] Multiple support members 22 can be inserted into the annular groove 11 through the opening and arranged along the circumference of the annular groove 11. The outer wall of the sleeve 221 of each support member 22 slides in fit with the side wall of the annular groove 11. It can be understood that the outer diameter of the sleeve 221 is equal to the groove width of the annular groove 11. After the sleeve 221 is inserted into the annular groove 11, it can prevent the sleeve 221 from moving radially along the annular groove 11, thereby improving the working stability of the support member 22. The sleeve 221 can be made of high-quality carbon structural steel or bearing steel. The inner hole of the sleeve 221 is honed to ensure smooth sliding of the sliding block 223. The elastic member 222 can be a cylindrical helical compression spring. The two ends of the elastic member 222 abut against the inner bottom surface of the sleeve 221 and the bottom surface of the sliding block 223, respectively. The bottom of the sleeve 221 has a through hole 228, the diameter of which is slightly larger than or equal to the diameter of the protrusion 224. When the sliding block 223 slides, it can drive its protrusion 224 to pass through the through hole 228 and extend to the outside of the sleeve 221. The protruding part of the protrusion 224 is used to abut against the end face of the workpiece. During assembly, a certain amount of pre-compression is applied so that the protrusion 224 of the sliding block 223 protrudes 4-7mm from the end face of the sleeve 221 in a free state, so that the protrusion 224 can fully contact the end face of the sleeve part during operation. The sliding block 223 and the protrusion 224 are an integral structure, and the top of the protrusion 224 is a spherical or arc-shaped surface. The pre-tightening mechanism 21 can be fixed to the base 1 with bolts for easy disassembly and assembly. During adjustment, the pre-tightening mechanism 21 can move closer to or further away from the support member 22. When the pre-tightening mechanism 21 moves closer to the support member 22 to abut against the support member 22, as the pre-tightening mechanism 21 continues to move, the pre-tightening mechanism 21 can push the outermost support member 22 to move. The outermost support member 22 drives all other support members 22 to move. As the pre-tightening mechanism 21 continues to move, the sleeves 221 of the multiple support members 22 slide along the annular groove 11 until the sleeves 221 abut against each other, thereby fastening the multiple support members 22 into one piece and preventing the multiple support members 22 from being displaced due to the cutting force during processing.

[0023] In one embodiment, please refer to Figure 2The adaptive fixture also includes a limiting member 3, which is located on the base 1 and abuts against the ends of multiple connected support members 22. The limiting member 3 cooperates with the pre-tightening mechanism 21 to clamp the multiple support members 22. In this embodiment, the limiting member 3 and the pre-tightening mechanism 21 are located at the two ends of the arc of the support members 22, forming a clamping and fixing of the multiple support members 22. The limiting member 3 is mainly used to cooperate with the pre-tightening mechanism 21 to clamp the multiple support members 22 to prevent the support members 22 from shifting during operation and affecting the processing of the sleeve parts. The limiting member 3 is a screw structure. A screw hole 12 is opened at the bottom of the annular groove 11 of the base 1. The screw hole 12 is threadedly connected to the limiting member 3 to facilitate the installation and removal of the limiting member 3. In addition, multiple screw holes 12 can be formed at the bottom of the annular groove 11. These screw holes 12 can be set along the sliding path of multiple support members 22. The limiting member 3 can be threadedly connected to any one of the screw holes 12. The specific installation position of the limiting member 3 can be determined according to the number of support members 22 accommodated by the annular groove 11, so that when different numbers of support members 22 are placed in the annular groove 11, the limiting member 3 can cooperate with the pre-tightening mechanism 21 to clamp and fix the multiple support members 22. The above structural arrangement can be understood as the limiting member 3 providing coarse adjustment and the pre-tightening mechanism 21 providing fine adjustment. A wear-resistant pad can be provided on the side of the limiting member 3 facing the support member 22. The wear-resistant pad is made of hardened steel or cemented carbide to prevent wear of the limiting member 3 caused by long-term contact.

[0024] In one embodiment, please refer to Figure 5 The support member 22 also includes a snap-fit ​​member 225, which connects to the end of the sleeve 221 away from the abutting slider 223. The snap-fit ​​member 225 slidably snaps into the bottom of the annular groove 11. In this embodiment, the snap-fit ​​member 225 and the sleeve 221 can be an integrally formed structure or fixed by interference fit, threaded connection or other methods. The snap-fit ​​member 225 forms a sliding fit with the bottom of the annular groove 11, so that the snap-fit ​​member 225 can drive the entire support member 22 to slide when sliding along the bottom of the annular groove 11.

[0025] Further, please refer to Figure 3 and Figure 4The bottom of the annular groove 11 is provided with a sliding ring groove 111, which is arc-shaped and has the same curvature as the annular groove 11. The sidewall of the snap-fit ​​component 225 has a snap-fit ​​groove 226 along its circumference, which slidably snaps into the sliding ring groove 111. In this embodiment, the starting position of the sliding ring groove 111 begins at the pre-tightening mechanism 21 and ends at the limiting member 3. When there are multiple screw holes 12 installed on the limiting member 3, the ending position of the sliding ring groove 111 ends at the outermost screw hole 12. The slip ring groove 111 is concentrically arranged with the annular groove 11 and located at the center of the bottom of the annular groove 11. The width and depth of the slip ring groove 111 are determined according to the magnitude of the supporting force. The bottom of the base 1 also has a bottom cavity 14. The bottom cavity 14 is annular and is connected to the annular groove 11 through the slip ring groove 111. The width of the bottom cavity 14 is greater than the width of the slip ring groove 111 and less than the width of the annular groove 11, so that the snap-fit ​​member 225 can be snapped into the slip ring groove 111 through the snap-fit ​​groove 226. Specifically, since the slot 226 is located on the side wall of the snap-fit ​​member 225, the bottom diameter of the slot 226 must be smaller than the outer diameter of the snap-fit ​​member 225. When the snap-fit ​​member 225 is snapped into the slip ring groove 111 through the slot 226, the bottom of the snap-fit ​​member 225 is located in the bottom cavity 14, and the top of the snap-fit ​​member 225 is located in the annular groove 11. This structural arrangement allows the snap-fit ​​member 225 to be stably connected to the base 1 after snapping into the slip ring groove 111, and the support member 22 will not detach from the base 1.

[0026] The slot 226 is formed around the entire circumference of the side wall of the snap-fit ​​member 225. Its cross-sectional shape matches the slip ring groove 111. The width of the slip ring groove 111 is slightly larger than the width of the slot 226 by 0.1-0.2 mm to form a sliding gap, allowing the support member 22 to slide more smoothly along the slip ring groove 111 without jamming. A copper alloy wear-resistant bushing or a polytetrafluoroethylene anti-friction ring can be embedded in the slot 226 to reduce friction and wear between the support member 22 and the side wall of the slip ring groove 111. The bottom of the annular groove 11 also has an installation inlet 112, which connects to the slip ring groove 111. The width of the installation inlet 112 is greater than the width of the slip ring groove 111, and its shape matches the shape of the snap-fit ​​member 225, so that the support member 22 can slide into the slip ring groove 111 through the snap-fit ​​member 225 and the installation inlet 112 during installation. During assembly, the snap-fit ​​225 is tilted at a certain angle so that the snap-fit ​​groove 226 is aligned with the installation inlet 112 and snapped in. Then the support 22 is straightened so that the snap-fit ​​225 is engaged with the sliding ring groove 111 through the snap-fit ​​groove 226, thereby achieving reliable axial positioning of the support 22 and the base 1, preventing the support 22 from coming off upward under axial force, and ensuring that the support 22 can slide freely along the circumference of the annular groove 11 to adjust its position.

[0027] In one embodiment, please refer to Figure 2The snap-fit ​​component 225 has a positioning post 227 on the side facing the elastic component 222, and the positioning post 227 is inserted into the elastic component 222. In this embodiment, the elastic component 222 is a spring, and the inside of the spring is hollow, which is used to snap the positioning post 227 to position the end of the spring and prevent the spring from shaking violently during use.

[0028] In one embodiment, please refer to Figure 1 The pre-tightening mechanism 21 includes a mounting component 211 and an adjusting component 212. The mounting component 211 is located on the base 1, and the adjusting component 212 is threaded through the mounting component 211. The portion of the adjusting component 212 that passes through the mounting component 211 can abut against or disengage from the ends of the multiple support components 22 away from the limiting component 3. In this embodiment, the mounting component 211 is a cast steel part or a welded structure. The mounting component 211 is fixed to the base 1 by a hexagonal head screw 215. The mounting component 211 has a threaded through hole that mates with the adjusting component 212. The thread specification is determined according to the required pre-tightening force, and generally a fine-pitch ordinary thread or a trapezoidal thread of M12-M20 is selected. The thread length is not less than 1.5 times the diameter of the adjusting component 212 to ensure connection strength. The adjusting component 212 can be a double-headed or single-headed adjusting screw. The middle part of the adjusting component 212 is threadedly engaged with the mounting component 211. One end of the adjusting component 212 facing the support component 22 is a smooth cylindrical head or ball head with a surface hardness of HRC45-50. The other end of the adjusting component 212 is provided with an internal hexagonal hole or a square head to facilitate wrench rotation. The axial travel of the adjusting component 212 should be greater than the total assembly clearance of the support component 22 in the annular groove 11. When the adjusting component 212 is screwed in, its end abuts against the end face of the sleeve 221 of the outermost support component 22, pushing each support component 22 to slide along the annular groove 11 until they are tightly abutting against each other. When screwed out, the constraint on the support component 22 is released, making it easy to adjust or replace the support component 22. In this embodiment, the adjusting member 212 is threadedly connected to the mounting member 211, which enables the adjusting member 212 to finely adjust the gap of the support member 22. At the same time, the threaded connection of the adjusting member 212 can automatically limit the adjusting member 212 and prevent the adjusting member 212 from having axial displacement after adjustment.

[0029] In one embodiment, please refer to Figure 1 The mounting member 211 is arc-shaped and has a groove 213. The adjusting member 212 is threaded through and extends into the groove 213, abutting against the ends of multiple support members 22 away from the limiting member 3. In this embodiment, the mounting member 211 is approximately U-shaped, which gives it better tensile and bending stiffness, enabling efficient transmission of locking force to the adjusting member 212 and improving reliability. The adjusting member 212 is arranged radially along the mounting member 211, with its thread passing through the outer arc surface of the mounting member 211 and extending into the groove 213. When screwed in, the end of the adjusting member 212 directly abuts against the end face of the outermost sleeve 221, achieving a tight abutment between the multiple sleeves 221.

[0030] In one embodiment, please refer to Figure 2 The pre-tightening mechanism 21 also includes a positioning nut 214, which is threaded onto the adjusting member 212. The positioning nut 214 is located on the side of the mounting member 211 facing away from the groove 213. In this embodiment, the positioning nut 214 uses a fine thread to engage with the adjusting member 212, and the thread pitch is 0.5-1mm smaller than the thread pitch on the mounting member 211 to form a self-locking effect of the threaded pair. The positioning nut 214 is a hexagonal thick nut or a slotted round nut, with a thickness not less than 0.8 times the thread diameter. The end face of the positioning nut 214 is ground flat, and the surface roughness Ra≤3.2μm. When adjusting the preload, first rotate the adjusting member 212 so that its end abuts against the end face of the sleeve 221 of the support member 22. Continue to rotate until each sleeve 221 abuts against each other and the required preload is reached. Then tighten the positioning nut 214 and lock it against the end face of the mounting member 211 facing away from the groove 213. The friction between the threads prevents the adjusting member 212 from rotating and loosening under the vibration of the machine tool. If necessary, a butterfly spring washer or wave spring washer can be added between the positioning nut 214 and the mounting member 211 to enhance the anti-loosening effect. Alternatively, a pin hole can be drilled radially on the positioning nut 214, and a cotter pin can be inserted to cooperate with the corresponding pin hole on the adjusting member 212 to achieve mechanical locking.

[0031] In one embodiment, please refer to Figure 2 The mounting component 211 is detachably connected to the base 1 at both ends by screws, which can be hexagonal head screws 215. The mounting component 211 and the base 1 are detachably connected, and the connection method is not limited. In this embodiment, the bottom of the mounting inlet 112 of the base 1 has a threaded hole 113. Both ends of the mounting component 211 are threadedly connected to the threaded hole 113 by screws, thus completing the installation and fixation of the mounting component 211. The mounting component 211 is detachably connected to the base 1 by screws, resulting in a simple structure and convenient assembly and disassembly. During assembly, multiple support components 22 can be slid into the slip ring groove 111 from the mounting inlet 112 in sequence. After sliding in, the mounting component 211 is then installed in the mounting inlet 112 using screws.

[0032] In one embodiment, please refer to Figure 3The adaptive fixture also includes a connecting handle 4. A central hole 13 is provided at the center of the base 1. The connecting handle 4 is inserted into and coaxially arranged with the central hole 13. The outer wall of the connecting handle 4 is frustoconical. In this embodiment, the connecting handle 4 can be made of 40Cr or 42CrMo alloy structural steel, and after tempering, its hardness reaches HB220-280. The taper of the frustoconical outer wall of the connecting handle 4 adopts a Morse taper or a metric taper, commonly Morse taper No. 4, 5, or 6, to facilitate mating with the taper hole of the lathe tailstock sleeve. One end of the connecting handle 4 has a post 41, the central axis of which coincides with the central axis of the connecting handle 4. The central hole 13 is located at the center of the base 1, and its diameter matches that of the post 41 of the connecting handle 4 to ensure the coaxiality of the connecting handle 4 and the base 1. After the insert 41 of the connecting shank 4 is inserted into the center hole 13, the insert 41 and the center hole 13 form an interference fit. It can also be circumferentially fixed by an end face key or a set screw to prevent relative rotation under the cutting force of the machine tool. The connecting shank 4 has a through hole or threaded hole along the axial direction at its center for installing a tie rod to tighten and fix the base 1 on the machine tool tailstock. During assembly, the insert 41 of the connecting shank 4 is first pressed into the center hole 13, the coaxiality is corrected and then fixed. Then the base 1 is installed on the machine tool tailstock through the connecting shank 4 to achieve quick clamping and positioning of the self-adaptive fixture and the machine tool.

[0033] To better understand this invention, the following is combined with... Figures 1 to 8 The technical solution of the present invention will be described in detail below: In use, firstly, determine the number of support members 22 according to the diameter of the sleeve part to be processed, and arrange them circumferentially along the annular groove 11. The snap-fit ​​parts 225 of each support member 22 are then snapped into the annular groove 11, and the snap-fit ​​parts 225 cooperate with the slip ring groove 111 through their snap-fit ​​grooves 226, allowing the support member 22 to slide along the slip ring groove 111. This process is repeated to install multiple support members 22. Then, install the limiting part 3 and the pre-tightening mechanism 21, and rotate the adjusting part 212 to ensure that each sleeve 221 is tightly abutted against each other, eliminating any gaps. Tighten the positioning nut 214 to lock it; clamp one end of the sleeve part 5 onto the lathe chuck, move the tailstock so that each protrusion 224 of this adaptive fixture is aligned with the other end face of the sleeve part 5, continue to move the tailstock so that the multiple protrusions 224 compress the elastic element 222 and fit against the end face of the workpiece. Since each supporting slider 223 can extend and retract independently, the protrusions 224 can adapt to the unevenness of the end face of the workpiece, realize multi-point uniform contact support, thereby providing a stable and reliable axial positioning reference for the workpiece and effectively reducing machining errors.

[0034] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. An adaptive fixture for machining sleeve-type parts, characterized in that, include: The base has an annular groove. and A support assembly includes a pre-tightening mechanism and multiple support members, all of which are located in the annular groove. Each support member includes a sleeve, an elastic element, and a retaining slider. The elastic element is located inside the sleeve and elastically abuts against the retaining slider. The retaining slider is slidably disposed inside the sleeve, and one end of the retaining slider away from the elastic element has a protrusion. The protrusion can extend outside the sleeve under the action of the elastic element. The pre-tightening mechanism is connected to the base and abuts against the sleeve of the support member, so that the multiple sleeves of the multiple support members abut against each other.

2. The adaptive fixture for machining sleeve-type parts according to claim 1, characterized in that, The support member further includes a snap-fit ​​element, which connects to the end of the sleeve away from the abutting slider, and the snap-fit ​​element slidably snaps into the bottom of the annular groove.

3. The adaptive fixture for machining sleeve-type parts according to claim 2, characterized in that, The bottom of the annular groove is provided with a sliding ring groove, and the side wall of the snap-fit ​​component is provided with a snap-fit ​​groove along its circumference, and the snap-fit ​​groove is slidably snapped into the sliding ring groove.

4. The adaptive fixture for machining sleeve-type parts according to claim 2, characterized in that, The snap-fit ​​component has a positioning post on the side facing the elastic element, and the positioning post is inserted into the elastic element.

5. The adaptive fixture for machining sleeve-type parts according to claim 1, characterized in that, The adaptive clamp also includes a limiting member, which is disposed on the base and used to abut against the ends of a plurality of connected support members. The limiting member cooperates with the pre-tightening mechanism to abut against the plurality of support members.

6. The adaptive fixture for machining sleeve-type parts according to claim 5, characterized in that, The pre-tightening mechanism includes a mounting component and an adjusting component. The mounting component is disposed on the base, and the adjusting component is threaded through the mounting component. The portion of the adjusting component that passes through the mounting component can abut against or disengage from the ends of the plurality of support components away from the limiting component.

7. The adaptive fixture for machining sleeve-type parts according to claim 6, characterized in that, The mounting component is arc-shaped and has a groove, and the end of the adjusting component threaded through and extending into the groove abuts against the ends of the plurality of supporting components away from the limiting component.

8. The adaptive fixture for machining sleeve-type parts according to claim 7, characterized in that, The pre-tightening mechanism further includes a positioning nut, which is threaded onto the adjusting member and is located on the side of the mounting member facing away from the groove.

9. The adaptive fixture for machining sleeve-type parts according to claim 7, characterized in that, The two ends of the mounting component are detachably connected to the base by screws.

10. The adaptive fixture for machining sleeve-type parts according to claim 1, characterized in that, The adaptive clamp also includes a connecting handle. The base has a central hole at its center. The connecting handle is inserted into the central hole and is coaxial with the central hole. The outer wall of the connecting handle is frustoconical.

Images