Valve sleeve outer wall processing clamp

Abstract

The application belongs to the field of valve sleeve processing equipment, and particularly relates to a valve sleeve outer wall processing clamp, which comprises a base, a fixed seat fixedly connected to the upper portion of the base, a connecting seat fixedly connected to the upper portion of the fixed seat, an inner support assembly fixedly connected to the upper portion of the connecting seat, a taper pin threadedly connected to the inner wall of the fixed seat, the taper pin penetrating through the inner support assembly and the connecting seat, and a positioning assembly arranged on the right side of the fixed seat and used for positioning the side edge of the valve sleeve. The inner arc surface of the upper portion of the inner support block of the inner support assembly is an inclined surface, which is in sliding fit with the conical outer side of the taper pin assembly. The conical structure of the taper pin generates radial thrust on the inclined surface, so that the inner support block is slightly expanded along the cross-shaped deformation groove, thereby tightly supporting the workpiece from the inside of the square valve sleeve. The side edge positioning element of the positioning assembly positions the side edge of the square valve sleeve, thereby improving the stability during outer wall processing.

Description

Technical Field

[0001] This application belongs to the field of valve sleeve processing equipment, specifically a valve sleeve outer wall processing fixture. Background Technology

[0002] In industrial fields such as hydraulics and pneumatics, valve sleeves are core components for controlling fluid flow and pressure regulation. The machining accuracy of their outer walls (such as dimensional tolerances, surface roughness, and coaxiality) directly determines the sealing performance and power transmission efficiency of the valve assembly.

[0003] Currently, in valve sleeve processing scenarios, the demand for outer wall processing (such as milling planes, drilling, and grinding) of square valve sleeves and arc-shaped outer wall valve sleeves accounts for a very high proportion.

[0004] Traditional valve sleeve outer wall machining often uses "external clamping" fixtures, such as three-jaw chucks and flat-jaw pliers, to fix the valve sleeve by external clamping force. The external clamping force acts directly on the machined surface of the valve sleeve outer wall, which is especially prone to causing indentations, scratches or local deformation, especially for valve sleeves with high surface finish requirements. This leads to a decrease in yield and requires an additional polishing process, increasing production costs. Utility Model Content

[0005] The purpose of this application is to address the shortcomings of existing technologies by adopting a combination design of internal support components for internal clamping and fixing of the valve sleeve and positioning components for auxiliary positioning from the side. This design provides a valve sleeve outer wall machining fixture, which solves the problem that traditional external clamping fixtures, due to the direct application of external clamping force to the valve sleeve outer wall machining surface, easily cause indentations, scratches, or local deformation in valve sleeves with high surface finish requirements.

[0006] To achieve the above objectives, the following technical solution is adopted: A valve sleeve outer wall machining fixture includes a base, a fixed seat fixedly connected to the upper part of the base, a connecting seat fixedly connected to the upper part of the fixed seat, an inner support assembly fixedly connected to the upper part of the connecting seat, a tapered pin threaded to the inner wall of the fixed seat, the tapered pin passing through the inner support assembly and the connecting seat, and a positioning assembly for positioning the side of the valve sleeve provided on the right side of the fixed seat. The tapered pin includes a threaded connecting rod, an assembly, and an operating groove. The assembly is fixedly connected to the upper part of the threaded connecting rod. The operating groove is opened at the top center of the assembly and is set in a regular hexagonal shape. The lower part of the assembly is set in a tapered shape. The threaded connecting rod passes through the inner support assembly and the connecting seat and is threadedly connected to the inner wall of the fixed seat. The inner support assembly includes an inner support block and a deformation groove. The inner support block is fixedly connected to the upper part of the connecting seat. The upper inner arc surface of the inner support block is set as an inclined surface. The inclined surface of the inner support block slides with the outer side of the assembly. The inner wall of the inner support block has a deformation groove in a cross shape.

[0007] Preferably, the positioning assembly includes a threaded rod and a side positioning member. The threaded rod is fixedly connected to the upper left side of the fixed seat, and the side positioning member slides on the outside of the threaded rod. A positioning ring is threadedly connected to the right side of the side positioning member near the outside of the threaded rod. The side positioning member is V-shaped, and an auxiliary member is provided on the outside of the side positioning member.

[0008] Preferably, the auxiliary component includes a workpiece positioning part and a connecting plate. The lower part of the workpiece positioning part contacts the outer side of the V-shaped side positioning part. The connecting plate is fixedly connected to the lower outer side of the workpiece positioning part. The connecting plate contacts the outer side of the side positioning part. The connecting plate is fixedly installed on the outer side of the side positioning part by a fixing member. The outer side of the side positioning part has a horizontally opened mounting hole. The fixing member passes through the mounting hole. An anti-slip sleeve is fixedly connected to the outer side of the workpiece positioning part.

[0009] Preferably, the outer side of the workpiece positioning part is configured as a circular arc surface, and the center of the workpiece positioning part is offset from the rotation axis of the side positioning component.

[0010] Preferably, the auxiliary component further includes a positioning pin and a positioning groove. The positioning pin is vertically fixedly connected to the lower side of the workpiece positioning part, and the positioning groove is vertically opened on the upper side of the side positioning component. The positioning pin and the positioning groove are interlocked.

[0011] Preferably, the fastener includes a bolt and a nut, the bolt passing through the connecting plate and the mounting hole, and the nut being threaded onto the left side of the bolt.

[0012] Preferably, the inner support assembly is located at the center of the connecting seat.

[0013] Compared with the prior art, the beneficial effects of this application are: 1. In this application, the upper inner arc surface of the inner support block of the inner support assembly is set as an inclined surface, which slides with the tapered outer side of the tapered pin assembly. The tapered structure of the tapered pin will generate radial thrust on the inclined surface, causing the inner support block to expand slightly along the cross-shaped deformation groove, thereby tightly supporting the workpiece from the inside of the square valve sleeve. This can avoid the indentation or scratches caused to the machined surface by the traditional external clamping method. At the same time, the side positioning component of the positioning assembly positions the side of the square valve sleeve, improving the stability during the outer wall machining.

[0014] 2. In this application, the auxiliary component is positioned by inserting a positioning pin into the positioning groove, and then fastened to the side positioning component by a fixing component. When processing arc-shaped outer wall valve sleeves of different diameters, the outer arc surface of the workpiece positioning part that deviates from the rotation axis of the side positioning component squeezes the valve sleeve, thereby improving the stability of the valve sleeve clamping. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this application; Figure 2 This is a schematic diagram showing the breakdown of this application; Figure 3 This is a schematic diagram showing the disassembly of the auxiliary components in this application.

[0016] The components are as follows: 1. Base; 2. Fixed seat; 3. Connecting seat; 4. Inner support assembly; 41. Inner support block; 42. Deformation groove; 5. Tapered pin; 51. Threaded connecting rod; 52. Assembly parts; 53. Operating groove; 6. Positioning assembly; 61. Threaded rod; 62. Side positioning part; 63. Positioning ring; 64. Auxiliary parts; 641. Workpiece positioning part; 642. Anti-slip sleeve; 643. Connecting plate; 644. Fixing part; 645. Positioning groove; 646. Positioning pin; 647. Mounting hole. Detailed Implementation

[0017] Reference Figure 1 - Figure 3 A valve sleeve outer wall machining fixture includes a base 1, which serves as the bottom load-bearing structure of the fixture. It is made of a rigid metal material such as 45 steel and is fixed to the worktable of the machining equipment by bolts, providing a stable installation reference for the entire fixture. A fixed seat 2 is fixedly connected to the upper part of the base 1, a connecting seat 3 is fixedly connected to the upper part of the fixed seat 2, and an inner support assembly 4 is fixedly connected to the upper part of the connecting seat 3. A tapered pin 5 is threadedly connected to the inner wall of the fixed seat 2, and the tapered pin 5 passes through the inner support assembly 4 and the connecting seat 3. A positioning assembly 6 for positioning the side of the valve sleeve is provided on the right side of the fixed seat 2. The tapered pin 5 includes a threaded connecting rod 51, an assembly 52, and an operating groove 53. The assembly 52 is fixedly connected to the upper part of the threaded connecting rod 51. When the assembly 52 moves downward, the outer tapered side generates a radial thrust on the inclined surface, pushing the inner support block 41 to expand outward. It is the direct transmission component of the inner support force. The operating groove 53 is located at the top center of the assembly 52. ​​The operating groove 53 is set in a regular hexagonal shape, which can be used with a standard hex wrench, making it convenient for operators to quickly tighten or loosen the tapered pin 5, reducing the difficulty of clamping operations and improving efficiency. The lower part of the assembly 52 is set in a tapered shape. The threaded connecting rod 51 passes through the inner support assembly 4 and the connecting seat 3 and is threaded to the inner wall of the fixed seat 2. When tightened, it can drive the assembly 52 to move downward, providing expansion power for the inner support block 41. The threaded structure can lock the position of the assembly 52 to prevent the inner support force from loosening due to processing vibration.

[0018] The inner support assembly 4 includes an inner support block 41 and a deformation groove 42. The inner support block 41 is fixedly connected to the upper part of the connecting seat 3. The upper inner arc surface of the inner support block 41 is set as an inclined surface. The inclined surface of the inner support block 41 slides with the outer side of the fitting 52. The inner wall of the inner support block 41 is provided with a cross-shaped deformation groove 42 to provide elastic deformation space for the inner support block 41. When subjected to the radial thrust of the fitting 52, it expands outward and tightly fits the inner wall of the valve sleeve, fixing the valve sleeve from the inside. The expansion range of the inner support block 41 is controlled by the downward movement distance of the fitting 52, which can adapt to valve sleeves with different inner diameters.

[0019] In this embodiment, when in use, the base 1 is first fixed to the workbench of the processing equipment with bolts, and the square valve sleeve to be processed is placed on the outside of the inner support block 41 of the inner support assembly 4, so that the lower end face of the valve sleeve is in contact with the upper surface of the connecting seat 3, thus completing the initial axial positioning; at the same time, the position of the valve sleeve is adjusted so that one side of the square valve sleeve faces the V-shaped side positioning member 62 of the positioning assembly 6, in preparation for subsequent side positioning.

[0020] Slide the V-shaped side positioning member 62 along the threaded rod 61 so that the inner wall of the V-shape of the side positioning member 62 is close to the side of the square valve sleeve; then tighten the positioning ring 63 on the outside of the threaded rod 61. The positioning ring 63 applies an axial thrust to the side positioning member 62, pushing the side positioning member 62 to continuously approach the valve sleeve until the inner wall of the V-shape is completely in contact with the side of the valve sleeve, thus achieving two-point positioning.

[0021] Next, insert an Allen wrench into the hexagonal operating groove 53 at the top of the tapered pin 5 and tighten the tapered pin 5 clockwise. The threaded connecting rod 51 moves downward along the inner thread of the fixed seat 2, causing the upper assembly 52 to move downward synchronously. Since the lower part of the assembly 52 has a tapered structure and slides in contact with the inclined surface of the inner support block 41, the outer side of the tapered shape will generate a radial thrust on the inclined surface during the downward movement. Under the action of the radial thrust, the inner support block 41 elastically expands along the cross-shaped deformation groove 42, and its outer side gradually fits tightly against the inner wall of the square valve sleeve. As the tapered pin 5 continues to tighten, the expansion force of the inner support block 41 gradually increases until it completely tightens the valve sleeve. This process fixes the workpiece from inside the valve sleeve, avoiding the indentations or scratches caused to the machined surface of the outer wall of the valve sleeve by the traditional external clamping method, while ensuring that the center of the valve sleeve is coaxial with the center of the clamp, laying the foundation for the machining accuracy of the outer wall.

[0022] When machining an arc-shaped valve sleeve, the circular arc surface of the workpiece positioning part 641, under the rotation of the side positioning member 62, tightly fits against the lower wall of the valve sleeve. The anti-slip sleeve 642 on the outer side of the workpiece positioning part 641 increases the friction with the valve sleeve, preventing the valve sleeve from sliding axially and avoiding scratches on the outer wall of the valve sleeve caused by direct metal-to-metal contact. In addition, the positioning pin 646 of the auxiliary member 64 engages with the positioning groove 645 of the side positioning member 62, ensuring the accurate installation position of the workpiece positioning part 641 in advance and preventing the auxiliary member 64 from shifting and affecting the positioning effect.

[0023] As a preferred embodiment, the positioning component 6 includes a threaded rod 61 and a side positioning element 62. The threaded rod 61 is fixedly connected to the upper left side of the fixed base 2, providing a sliding guide and mounting base for the side positioning element 62. Simultaneously, a positioning ring 63 is threadedly connected to it, enabling axial position adjustment of the side positioning element 62. The side positioning element 62 slides on the outside of the threaded rod 61. A positioning ring 63 is threadedly connected to the right side of the side positioning element 62 near the outside of the threaded rod 61. Tightening the ring pushes the side positioning element 62 towards the valve sleeve until the V-shaped inner wall conforms to the square valve sleeve, achieving radial positioning. The position of the positioning ring 63 can be adjusted according to the valve sleeve length to accommodate different valve sleeve specifications. The side positioning element 62 is V-shaped, achieving radial alignment of the valve sleeve through the compression of the two side walls, preventing radial runout during valve sleeve processing. Simultaneously, the outer side provides a mounting surface for an auxiliary element 64, expanding the positioning function. An auxiliary element 64 is provided on the outer side of the side positioning element 62.

[0024] As a preferred embodiment, the auxiliary component 64 includes a workpiece positioning part 641 and a connecting plate 643. The lower part of the workpiece positioning part 641 contacts the outer side of the V-shaped side positioning part 62. By rotating at different angles, the arc surface can be tightly pressed against the outer wall of the valve sleeve. Through the pressing contact, the constraint is enhanced, preventing the valve sleeve from sliding axially and reducing indentation damage to the outer side of the valve sleeve. The connecting plate 643 is fixedly connected to the lower outer side of the workpiece positioning part 641. The connecting plate 643 contacts the outer side of the side positioning part 62 and serves as the mounting carrier for the workpiece positioning part 641. The connecting plate 643 is fixedly installed on the outer side of the side positioning part 62 by a fixing member 644. A mounting hole 647 is horizontally opened on the outer side of the side positioning part 62, and the fixing member 644 passes through the mounting hole 647. An anti-slip sleeve 642 is fixedly connected to the outer side of the workpiece positioning part 641. The anti-slip sleeve 642 is made of rubber or polyurethane material, which increases the friction between the workpiece positioning part 641 and the outer wall of the valve sleeve and prevents the valve sleeve from shifting due to processing vibration. At the same time, the flexible material can avoid scratches on the outer wall of the valve sleeve caused by direct metal contact.

[0025] As a preferred embodiment, the outer side of the workpiece positioning part 641 is configured as a circular arc surface, and the center of the workpiece positioning part 641 is offset from the rotation axis of the side positioning member 62.

[0026] As a preferred embodiment, the auxiliary component 64 also includes a positioning pin 646 and a positioning groove 645. The positioning pin 646 is vertically fixed to the lower side of the workpiece positioning part 641, and the positioning groove 645 is vertically formed on the upper side of the side positioning component 62. The positioning pin 646 and the positioning groove 645 are interlocked to quickly position the installation position of the workpiece positioning part 641 and the side positioning component 62, preventing the workpiece positioning part 641 from shifting during installation. At the same time, the auxiliary fixing component 644 bears the radial force to prevent the bolt from loosening due to long-term stress.

[0027] As a preferred embodiment, the fastener 644 includes a bolt and a nut. The bolt passes through the connecting plate 643 and the mounting hole 647, and the nut is threaded onto the left side of the bolt, thereby fastening the workpiece positioning part 641 to the side positioning part 62.

[0028] As a preferred embodiment, the inner support assembly 4 is located at the center of the connecting seat 3.

Claims

1. A fixture for machining the outer wall of a valve sleeve, characterized in that: Includes a base (1), a fixed seat (2) is fixedly connected to the upper part of the base (1), a connecting seat (3) is fixedly connected to the upper part of the fixed seat (2), an inner support assembly (4) is fixedly connected to the upper part of the connecting seat (3), a tapered pin (5) is threadedly connected to the inner wall of the fixed seat (2), the tapered pin (5) passes through the inner support assembly (4) and the connecting seat (3), and a positioning assembly (6) for positioning the side of the valve sleeve is provided on the right side of the fixed seat (2). The tapered pin (5) includes a threaded connecting rod (51), an assembly (52), and an operating groove (53). The assembly (52) is fixedly connected to the upper part of the threaded connecting rod (51). The operating groove (53) is opened at the top center of the assembly (52). The operating groove (53) is set in a regular hexagonal shape. The lower part of the assembly (52) is set in a tapered shape. The threaded connecting rod (51) passes through the inner support assembly (4) and the connecting seat (3) and is threadedly connected to the inner wall of the fixed seat (2). The inner support assembly (4) includes an inner support block (41) and a deformation groove (42). The inner support block (41) is fixedly connected to the upper part of the connecting seat (3). The upper inner arc surface of the inner support block (41) is set as an inclined surface. The inclined surface of the inner support block (41) slides with the outer side of the assembly (52). The inner wall of the inner support block (41) is provided with a deformation groove (42) in a cross shape.

2. The valve sleeve outer wall machining fixture according to claim 1, characterized in that: The positioning component (6) includes a threaded rod (61) and a side positioning member (62). The threaded rod (61) is fixedly connected to the upper left side of the fixed base (2). The side positioning member (62) slides on the outside of the threaded rod (61). A positioning ring (63) is threadedly connected to the right side of the side positioning member (62) near the outside of the threaded rod (61). The side positioning member (62) is set in a V shape. An auxiliary member (64) is provided on the outside of the side positioning member (62).

3. A valve sleeve outer wall machining fixture according to claim 2, characterized in that: The auxiliary component (64) includes a workpiece positioning part (641) and a connecting plate (643). The lower part of the workpiece positioning part (641) contacts the outer side of the V-shape of the side positioning part (62). The connecting plate (643) is fixedly connected to the lower outer side of the workpiece positioning part (641). The connecting plate (643) contacts the outer side of the side positioning part (62). The connecting plate (643) is fixedly installed on the outer side of the side positioning part (62) by a fixing part (644). The outer side of the side positioning part (62) has a horizontally opened mounting hole (647). The fixing part (644) passes through the mounting hole (647). The outer side of the workpiece positioning part (641) is fixedly connected to an anti-slip sleeve (642).

4. A valve sleeve outer wall machining fixture according to claim 3, characterized in that: The outer side of the workpiece positioning part (641) is set as a circular arc surface, and the center of the workpiece positioning part (641) is offset from the rotation axis of the side positioning part (62).

5. A valve sleeve outer wall machining fixture according to claim 3, characterized in that: The auxiliary component (64) also includes a positioning pin (646) and a positioning groove (645). The positioning pin (646) is vertically fixedly connected to the lower side of the workpiece positioning part (641), and the positioning groove (645) is vertically opened on the upper side of the side positioning component (62). The positioning pin (646) and the positioning groove (645) are inserted into each other.

6. A valve sleeve outer wall machining fixture according to claim 3, characterized in that: The fastener (644) includes a bolt and a nut, the bolt passing through the connecting plate (643) and the mounting hole (647), and the nut being threaded onto the left side of the bolt.

7. A fixture for machining the outer wall of a valve sleeve according to claim 1, characterized in that: The inner support assembly (4) is located at the center of the connecting seat (3).

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