Clamp for finishing the outer circle of a compressor cylinder liner

Abstract

The utility model relates to mechanical processing fixture technical field discloses a kind of fixture for compressor cylinder liner outer circle finish machining, including base, the mobile assembly for driving workpiece movement, the positioning assembly and the clamping assembly of clamping workpiece for positioning workpiece are equipped on the base, the surface of the base is equipped with scale ruler in front and back end, the clamping assembly includes fixed shaft, clamping support plate, threaded rod, rotating motor, threaded slide block, hinged rod and positioning sleeve, the rotating disc is fixedly installed in one end of fixed shaft, the clamping support plate is used to support workpiece, rotating motor drives threaded rod rotation, drives threaded slide block to move, cooperation hinged rod accurately adjusts clamping support plate props up and clamps cylinder liner inner wall, positioning sleeve is adapted with the positioning semicircular groove of positioning frame, realizes workpiece end accurate positioning support, so that clamping force is evenly applied to outer circle, avoid thin-walled cylinder liner deformation, guarantee the coaxiality of outer circle and datum surface after processing, improve processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a fixture for precision machining of the outer diameter of a compressor cylinder liner. Background Technology

[0002] In the precision machining of the outer diameter of compressor cylinder liners, the fixture plays a crucial role. With its carefully designed structure and excellent performance, it provides a solid guarantee for the machining process. From the perspective of ensuring machining accuracy, a high-quality fixture can achieve precise positioning and stable clamping of the cylinder liner. Its positioning datum is strictly consistent with the machining datum, effectively avoiding machining errors caused by positioning deviations. At the same time, the rigid design of the fixture ensures that even when subjected to cutting forces during machining, the workpiece will not shift or vibrate, thereby guaranteeing key indicators such as the dimensional accuracy, roundness, and cylindricity of the outer diameter, laying a solid foundation for the subsequent assembly accuracy of the cylinder liner.

[0003] Currently, there are many problems with the fixtures used for precision machining of the outer diameter of compressor cylinder liners. For example, the positioning mechanism is poorly designed, resulting in inaccurate positioning of the cylinder liner. The coaxiality error between the machined outer diameter and the reference surface is large, affecting product quality. The clamping force applied by the clamping mechanism is uneven, which can easily cause deformation of the cylinder liner, especially for thin-walled cylinder liners, where the deformation problem is more prominent. At the same time, the existing fixtures take a long time to clamp and unclamp the workpiece, reducing the machining efficiency. Therefore, we propose a fixture for precision machining of the outer diameter of compressor cylinder liners. Utility Model Content

[0004] The purpose of this utility model is to provide a fixture for precision machining of the outer diameter of compressor cylinder liners, in order to solve the problems of unreasonable positioning mechanism design of current fixtures for precision machining of cylinder liners, which leads to inaccurate positioning of cylinder liners, large coaxiality error between the machined outer diameter and the reference surface, affecting product quality, uneven clamping force applied by the clamping mechanism, which easily causes deformation of the cylinder liner, especially for thin-walled cylinder liners, where the deformation problem is more prominent. At the same time, the existing fixtures take a long time to clamp and disassemble the workpiece, reducing the processing efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fixture for precision machining of the outer diameter of a compressor cylinder liner, comprising a base, wherein the base is provided with a moving component for moving the workpiece, a positioning component for positioning the workpiece, and a clamping component for clamping the workpiece; the front and rear ends of the surface of the base are provided with scales; the clamping component includes a turntable, a fixed shaft, a clamping support plate, a threaded rod, a rotating motor, a threaded slider, a fixed sleeve, a hinge rod, and a positioning sleeve; the turntable is fixedly installed at one end of the fixed shaft; the clamping support plate is used to support the workpiece; the threaded rod is rotatably connected to the inside of the fixed shaft; the rotating motor is fixedly installed at one end of the threaded rod and drives the threaded rod to rotate; the threaded slider is threadedly engaged with the threaded rod; and two sets of fixed sleeves are provided and are respectively fixedly installed at both ends of the circumferential surface of the fixed shaft.

[0006] As a preferred embodiment, the moving component includes a drive motor, a lead screw, a fixed rod, a limiting slider, and a limiting groove. The drive motor is fixed to one side surface of the base, and the output shaft of the drive motor is fixedly connected to one end of the lead screw. The fixed rod is arranged parallel to the lead screw in the limiting groove of the base. Two sets of limiting sliders are provided, which are respectively threaded into the lead screw and slidably sleeved on the fixed rod. Two sets of limiting grooves are provided and opened on the base for limiting and guiding the limiting sliders.

[0007] As a preferred embodiment, the positioning component includes a positioning frame, a positioning semicircular groove, an arc-shaped support block, and a long plate. The positioning frame is fixed on the limiting slider, the positioning semicircular groove is opened on the top of the positioning frame, and two sets of arc-shaped support blocks are provided and fixedly installed on the positioning frame.

[0008] As a preferred embodiment, the long plate is fixedly installed on the positioning frame and located between two sets of arc-shaped support blocks. The two ends of the long plate extend above the scale. The inner arc surface of the arc-shaped support block is adapted to the outer circle of the compressor cylinder liner. The arc-shaped support block is made of rubber and has anti-slip texture on its surface.

[0009] As a preferred embodiment, the outer surfaces of the fixed shaft and the threaded rod are both fitted with positioning sleeves. The positioning sleeves are set inside the positioning semicircular groove on the positioning frame and are used to position the end of the workpiece. One set of the hinge rods is hinged at both ends to the threaded slider and the clamping support plate, respectively. The other set of hinge rods is hinged at both ends to the fixed sleeve and the clamping support plate, respectively. By driving the threaded slider to move closer or further away, the cylinder liner is clamped.

[0010] As a preferred embodiment, the rotating motor is a reversible motor that controls the forward and reverse rotation of the threaded rod. The rotating motor drives the threaded slider to move back and forth, thereby adjusting the opening and closing angles of the hinge rod and adjusting the clamping force.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. By setting up a clamping assembly, the fixed shaft, clamping support plate, threaded rod, rotating motor, threaded slider, fixed sleeve, and hinge rod work together to solve the problem of cylinder liner deformation caused by uneven clamping force in traditional fixtures. The rotating motor drives the threaded rod to rotate, which in turn moves the threaded slider. The hinge rod precisely adjusts the clamping support plate to support and clamp the inner wall of the cylinder liner. The positioning sleeve and the positioning bracket's positioning semi-circular groove are matched to achieve precise positioning support at the end of the workpiece, so that the clamping force is evenly applied to the outer circle, avoiding deformation of thin-walled cylinder liners, ensuring the coaxiality of the outer circle and the datum surface after machining, improving product quality, and making clamping and disassembly convenient, reducing time consumption and improving processing efficiency.

[0013] 2. By cooperating with the moving and positioning components, the problem of inaccurate positioning in traditional fixtures is effectively solved. The drive motor drives the lead screw to rotate, causing the limit slider to move stably along the fixed rod and the limit groove, achieving precise adjustment of the workpiece machining position. The positioning semi-circular groove and arc-shaped support block on the positioning frame are adapted to the outer circle of the cylinder liner. The long plate, together with the scale, can accurately position the cylinder liner. The arc-shaped support block, made of rubber with anti-slip texture, can not only stably support the cylinder liner, but also reduce wear during positioning, ensuring positioning accuracy. This improves the dimensional and shape accuracy of the outer circle finishing, reduces the coaxiality error between the outer circle and the datum surface after machining, and helps the high-quality production of compressor cylinder liners. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a partial structural schematic diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the moving component and the positioning component of this utility model;

[0017] Figure 4 This is a schematic diagram of the clamping assembly structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the unfolded structure of the clamping assembly of this utility model.

[0019] In the diagram: 1. Base; 2. Moving component; 3. Positioning component; 4. Clamping component; 5. Scale; 201. Drive motor; 202. Lead screw; 203. Fixing rod; 204. Limiting slider; 205. Limiting groove; 301. Positioning frame; 302. Positioning semi-circular groove; 303. Arc-shaped support block; 304. Long plate; 401. Turntable; 402. Fixed shaft; 403. Clamping support plate; 404. Threaded rod; 405. Rotating motor; 406. Threaded slider; 407. Fixing sleeve; 408. Hinge rod; 409. Positioning sleeve. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see the appendix Figure 1 - Appendix Figure 2 and appendix Figure 4 - Appendix Figure 5 A fixture for precision machining of the outer diameter of a compressor cylinder liner includes a base 1. The base 1 has a moving assembly 2 for moving the workpiece, a positioning assembly 3 for positioning the workpiece, and a clamping assembly 4 for clamping the workpiece. The base 1 has scales 5 on both its front and rear ends. The clamping assembly 4 includes a turntable 401, a fixed shaft 402, a clamping support plate 403, a threaded rod 404, a rotating motor 405, a threaded slider 406, a fixed sleeve 407, a hinge rod 408, and a positioning sleeve 409. The turntable 401 is fixedly mounted on one end of the fixed shaft 402. The clamping support plate 403 supports the workpiece. The threaded rod 404 is rotatably connected to the inside of the fixed shaft 402. The rotating motor 405 is fixedly mounted on the threaded rod 404. One end drives the threaded rod 404 to rotate. The threaded slider 406 is threadedly engaged with the threaded rod 404. The fixed sleeve 407 is provided in two sets and is fixedly installed at both ends of the circumferential surface of the fixed shaft 402. The turntable 401 can drive the fixed shaft 402 to rotate. When the cylinder liner is supported and clamped by the clamping support plate 403, rotating the turntable 401 can realize the rotation of the cylinder liner by the entire device, realizing the precision machining at different positions on the circumferential surface of the cylinder liner. However, during the machining process, the anti-slip texture on the surface of the arc support block 303 can prevent it from rotating easily and will not affect the machining. The fixed sleeve 407 provides a stable support point for the hinge rod 408, making the clamping action more reliable and improving the flexibility and stability of the clamping assembly 4 as a whole.

[0022] Positioning sleeves 409 are fitted on the outer surfaces of both the fixed shaft 402 and the threaded rod 404. The positioning sleeves 409 are located inside the positioning semicircular groove 302 on the positioning frame 301 and are used to position the end of the workpiece. One set of hinge rods 408 are hinged at both ends to the threaded slider 406 and the clamping support plate 403, respectively. The other set of hinge rods 408 are hinged at both ends to the fixed sleeve 407 and the clamping support plate 403, respectively. By driving the threaded slider 406 to move closer or further away, the cylinder liner is clamped. The cooperation between the positioning sleeve 409 and the positioning semicircular groove 302 can accurately limit the position of the end of the workpiece, but does not affect the rotation of the positioning sleeve 409 in the positioning semicircular groove 302. The symmetrical transmission design of the two sets of hinge rods 408 ensures that the clamping force of the clamping support plate 403 on the cylinder liner is evenly distributed, avoiding workpiece skewing or deformation.

[0023] The rotating motor 405 is a reversible motor that controls the forward and reverse rotation of the threaded rod 404. The rotating motor 405 drives the threaded slider 406 to move back and forth, thereby adjusting the opening and closing angle of the hinge rod 408 and realizing the adjustment of the clamping force. The forward and reverse rotation function of the rotating motor 405, through the cooperation of the threaded rod 404 and the threaded slider 406, realizes the stepless adjustment of the angle of the hinge rod 408, which can not only meet the clamping requirements of the cylinder liner, but also accurately control the clamping force and protect the thin-walled workpiece.

[0024] Specifically, by setting up clamping assembly 4, the coordinated action of fixed shaft 402, clamping support plate 403, threaded rod 404, rotating motor 405, threaded slider 406, fixed sleeve 407, and hinge rod 408 effectively solves the problem of cylinder liner deformation caused by uneven clamping force in traditional fixtures. Rotating motor 405 drives threaded rod 404 to rotate, which in turn moves threaded slider 406. With the help of hinge rod 408, clamping support plate 403 can be precisely adjusted to support the cylinder liner, thereby clamping the inner wall of the cylinder liner. Positioning sleeve 409 is adapted to positioning semi-circular groove 302 on positioning frame 301, which can accurately position and support the end of the workpiece, so that the clamping force is evenly applied to the outer circle of the cylinder liner, avoiding deformation of thin-walled cylinder liners due to uneven force, ensuring the coaxiality of the outer circle and the reference surface after processing, improving product quality, and the clamping and disassembly process is relatively convenient, reducing time consumption and improving processing efficiency.

[0025] Please see the appendix Figure 1 - Appendix Figure 3The moving component 2 includes a drive motor 201, a lead screw 202, a fixed rod 203, a limiting slider 204, and a limiting groove 205. The drive motor 201 is fixed on one side surface of the base 1. The output shaft of the drive motor 201 is fixedly connected to one end of the lead screw 202. The fixed rod 203 is arranged parallel to the lead screw 202 in the limiting groove 205 of the base 1. Two sets of limiting sliders 204 are provided, which are threadedly engaged with the lead screw 202 and slidably sleeved on the fixed rod 203, respectively. Two sets of limiting grooves 205 are provided and opened on the base 1 for limiting and guiding the limiting sliders 204. The power provided by the drive motor 201 is converted into the smooth movement of the limiting sliders 204 through the lead screw 202. The fixed rod 203 and the two sets of limiting grooves 205 together constrain the movement trajectory of the sliders, ensuring that the positioning frame 301 drives the workpiece to move accurately along a straight line, thereby improving the processing position control accuracy.

[0026] The positioning component 3 includes a positioning frame 301, a positioning semicircular groove 302, an arc-shaped support block 303, and a long plate 304. The positioning frame 301 is fixed on the limiting slider 204. The positioning semicircular groove 302 is opened on the top of the positioning frame 301. Two sets of arc-shaped support blocks 303 are provided and fixedly installed on the positioning frame 301. The positioning frame 301 is linked with the moving component 2 through the limiting slider 204. The positioning semicircular groove 302 and the arc-shaped support block 303 form a three-dimensional positioning structure, which double-limits the radial sway of the cylinder liner and provides a stable foundation for processing.

[0027] The long plate 304 is fixedly installed on the positioning frame 301 and located between two sets of arc-shaped support blocks 303. Both ends of the long plate 304 extend above the scale 5. The inner arc surface of the arc-shaped support block 303 is adapted to the outer circle of the compressor cylinder liner. The arc-shaped support block 303 is made of rubber and has anti-slip texture on the surface. The cooperation between the long plate 304 and the scale 5 allows for intuitive reading of workpiece displacement data, which is convenient for precise control of the processing position. The rubber material and anti-slip texture of the arc-shaped support block 303 can enhance friction to prevent the workpiece from sliding and avoid damage to the outer circle of the cylinder liner caused by hard contact.

[0028] Specifically, by setting the moving component 2 and the positioning component 3, the problem of inaccurate positioning of traditional fixtures is solved. The drive motor 201 drives the lead screw 202 to rotate, so that the limit slider 204 moves stably along the fixed rod 203 and the limit groove 205, which can accurately adjust the workpiece processing position. The positioning semi-circular groove 302 and the arc-shaped support block 303 on the positioning frame 301 are adapted to the outer circle of the cylinder liner. The long plate 304, together with the scale 5, positions the cylinder liner. The arc-shaped support block 303, made of rubber and with anti-slip texture, can not only stably support the cylinder liner, but also reduce wear during positioning, ensuring positioning accuracy, thereby improving the dimensional accuracy and shape accuracy of the outer circle finishing, making the coaxiality error between the outer circle and the reference surface smaller after machining, and helping to produce high-quality compressor cylinder liners.

[0029] Working principle of this utility model: This utility model is a fixture for precision machining of the outer diameter of a compressor cylinder liner. During machining, the compressor cylinder liner is first placed on the positioning frame 301 of the positioning assembly 3, so that the end of the cylinder liner is in contact with the outer surface of the fixed shaft 402 and the threaded rod 404, and the positioning sleeve 409 is placed in the positioning semi-circular groove 302 of the positioning frame 301. At the same time, the outer diameter of the cylinder liner contacts the inner arc surface of the two sets of arc-shaped support blocks 303. The rubber material and anti-slip texture of the arc-shaped support blocks 303 initially stabilize the workpiece. The positions of the two ends of the long plate 304 above the scale 5 can help confirm the initial positioning of the workpiece. Then, the rotation motor 405 of the clamping assembly 4 is started. The rotation motor 405 drives the threaded rod 404 to rotate forward, driving the threaded slide... The block 406 moves, and through the transmission of two sets of hinge rods 408, the clamping support plate 403 moves closer to and clamps the inner wall of the cylinder liner, achieving a stable clamping of the workpiece. If the processing position needs to be adjusted, the drive motor 201 of the moving component 2 is started. The drive motor 201 drives the lead screw 202 to rotate, so that the limit slider 204 moves smoothly along the fixed rod 203 and the limit groove 205, thereby driving the positioning frame 301 and the workpiece above it to move synchronously. Combined with the corresponding position of the long plate 304 and the scale 5, the movement distance is precisely controlled to ensure accurate processing position. After processing is completed, the rotating motor 405 reverses, driving the threaded slider 406 to move in the opposite direction, so that the clamping support plate 403 is released, and the workpiece can be removed. At this point, the entire process is completed.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixture for precision machining of the outer diameter of a compressor cylinder liner, comprising a base (1), characterized in that: The base (1) is provided with a moving component (2) for moving the workpiece, a positioning component (3) for positioning the workpiece, and a clamping component (4) for clamping the workpiece. The front and rear ends of the surface of the base (1) are provided with scales (5). The clamping component (4) includes a turntable (401), a fixed shaft (402), a clamping support plate (403), a threaded rod (404), a rotating motor (405), a threaded slider (406), a fixed sleeve (407), a hinge rod (408), and a positioning sleeve (409). The turntable (401) is fixedly installed at one end of the fixed shaft (402), the clamping support plate (403) is used to support the workpiece, the threaded rod (404) is rotatably connected to the inside of the fixed shaft (402), the rotating motor (405) is fixedly installed at one end of the threaded rod (404) and drives the threaded rod (404) to rotate, the threaded slider (406) is threadedly engaged with the threaded rod (404), and two sets of fixed sleeves (407) are provided and respectively fixedly installed at both ends of the circumferential surface of the fixed shaft (402).

2. The fixture for precision machining of the outer diameter of a compressor cylinder liner according to claim 1, characterized in that: The moving component (2) includes a drive motor (201), a lead screw (202), a fixed rod (203), a limiting slider (204), and a limiting groove (205). The drive motor (201) is fixed on one side surface of the base (1). The output shaft of the drive motor (201) is fixedly connected to one end of the lead screw (202). The fixed rod (203) is arranged parallel to the lead screw (202) in the limiting groove (205) of the base (1). Two sets of limiting sliders (204) are provided and are respectively threaded to the lead screw (202) and slidably sleeved on the fixed rod (203). Two sets of limiting grooves (205) are provided and are opened on the base (1) for limiting and guiding the limiting sliders (204).

3. The fixture for precision machining of the outer diameter of a compressor cylinder liner according to claim 1, characterized in that: The positioning component (3) includes a positioning frame (301), a positioning semicircular groove (302), an arc-shaped support block (303), and a long plate (304). The positioning frame (301) is fixed on the limiting slider (204). The positioning semicircular groove (302) is opened on the top of the positioning frame (301). Two sets of arc-shaped support blocks (303) are provided and fixedly installed on the positioning frame (301).

4. A fixture for precision machining of the outer diameter of a compressor cylinder liner according to claim 3, characterized in that: The long plate (304) is fixedly installed on the positioning frame (301) and located between two sets of arc-shaped support blocks (303). The two ends of the long plate (304) extend above the scale (5). The inner arc surface of the arc-shaped support block (303) is adapted to the outer circle of the compressor cylinder liner. The arc-shaped support block (303) is made of rubber and has anti-slip texture on its surface.

5. A fixture for precision machining of the outer diameter of a compressor cylinder liner according to claim 1, characterized in that: The outer surfaces of the fixed shaft (402) and the threaded rod (404) are both fitted with positioning sleeves (409). The positioning sleeves (409) are set inside the positioning semicircular groove (302) on the positioning frame (301) and are used to position the end of the workpiece. One set of hinge rods (408) is hinged at both ends to the threaded slider (406) and the clamping support plate (403) respectively. The other set of hinge rods (408) is hinged at both ends to the fixed sleeve (407) and the clamping support plate (403) respectively. By driving the threaded slider (406) to move closer or further away, the cylinder liner is clamped.

6. A fixture for precision machining of the outer diameter of a compressor cylinder liner according to claim 5, characterized in that: The rotating motor (405) is a reversible motor that controls the forward and reverse rotation of the threaded rod (404). The rotating motor (405) drives the threaded slider (406) to move back and forth, thereby adjusting the opening and closing angle of the hinge rod (408) and realizing the adjustment of the clamping force.

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