Ceramic inner hole processing jig

Abstract

The utility model discloses a kind of ceramic inner hole processing fixtures, it is related to ceramic processing field, including pedestal, positioning assembly and flexible clamping assembly;The inner wall of pedestal is equipped with at least two guide slides;Positioning assembly includes positioning end cap and floating positioning ring, the port at the one end of pedestal is fixedly equipped with positioning end cap, the center of positioning end cap is equipped with the positioning hole coaxial with pedestal;Floating positioning ring is equipped in the inside of pedestal, and floating positioning ring is slidably fitted on guide slide, and a plurality of first elastic members are connected between floating positioning ring and positioning end cap;Flexible clamping assembly is arranged between positioning end cap and floating positioning ring;Compared with prior art, the utility model can be applicable to different lengths of ceramic product clamping, high stability when high-speed operation, and then improve the precision of inner hole processing, in addition clamping action also can not scratch the surface of ceramic product.

Description

Technical Field

[0001] This utility model relates to the field of ceramic processing, and in particular to a ceramic internal hole processing fixture. Background Technology

[0002] Ceramic materials, due to their excellent properties such as high strength, high hardness, high temperature resistance, and corrosion resistance, are widely used in electronics, machinery, aerospace, and other fields. In the processing of ceramic products, internal hole machining is one of the common procedures, especially for long, cylindrical ceramic products (such as ceramic shafts and ceramic sleeves), where the coaxiality, dimensional accuracy, and surface quality of the internal holes directly affect the product's performance.

[0003] In existing technologies, the machining of ceramic internal holes typically involves using a lathe fixture to clamp the product onto a spindle, driving the product to rotate via the spindle, and then using a cutting tool to turn or mill the internal hole. Because ceramic materials are brittle, have high surface hardness but poor impact resistance, directly using traditional metal fixtures for clamping can easily lead to scratches and cracks on the ceramic surface due to excessive clamping force or hard contact between the fixture and the product surface. To avoid scratches, soft rubber is often used as a pad on the product surface; however, the elastic deformation of the soft rubber can reduce the positioning accuracy after clamping, especially for long, narrow ceramic products, which are prone to problems such as axial misalignment and wobbling during rotation. This can cause the coaxiality deviation of the internal hole machining to exceed the allowable range, making it difficult to meet the required machining accuracy.

[0004] Further searching of existing patents reveals that the utility model patent with application number CN201720107818.X discloses "a scratch-resistant fixture for ceramic products," which achieves scratch resistance by setting a Teflon layer on the inner wall of the fixture cavity. However, this fixture is only suitable for clamping short-sized ceramic products and does not have a positioning structure designed for the rotational stability of long and narrow products, thus failing to solve the problem of axial offset during the processing of long and narrow ceramics. The invention patent with application number CN202411878164.4 discloses "a batch clamping fixture and processing method for cylindrical ceramic green blanks," which solves the problem of clamping and cracking through a flexible locking component. However, this fixture is mainly for batch positioning of green blanks and does not have a coaxial calibration structure specifically for inner hole processing. During processing, the product is prone to radial movement, affecting the accuracy of the inner hole.

[0005] Therefore, in view of the shortcomings of the existing technology, there is an urgent need to design a special fixture that can achieve scratch-free clamping of ceramic products and ensure the rotational stability and internal hole machining accuracy of long strip ceramic products. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model provides a technical solution that can solve the above problems.

[0007] A ceramic internal hole machining fixture includes a base, a positioning component, and a flexible clamping component; The base is a hollow cylindrical structure with openings at both ends. The inner wall of the base is provided with at least two axially extending guide rails, and each guide rail is evenly distributed along the circumference of the base. The positioning component includes a positioning end cap and a floating positioning ring. The positioning end cap is fixedly disposed at one end of the base, and a positioning hole coaxial with the base is opened in the center of the positioning end cap. The floating positioning ring is located inside the base and is slidably mounted on the guide rail. Several first elastic elements are connected between the floating positioning ring and the positioning end cover. The first elastic elements are evenly distributed along the circumference of the base. The flexible clamping assembly includes at least three sets of clamping units, each clamping unit being evenly distributed along the circumference of the base, and the clamping units being disposed between the positioning end cap and the floating positioning ring.

[0008] Furthermore: the clamping unit includes an adjusting screw, a flexible pressure block, and a second elastic element. The side wall of the base has a threaded hole adapted to the adjusting screw. The adjusting screw passes through the threaded hole and is threadedly connected to the base. The flexible pressure block is installed at one end of the adjusting screw that extends into the base. The second elastic element is sleeved on the outside of the adjusting screw, and both ends of the second elastic element abut against the flexible pressure block and the inner wall of the base, respectively.

[0009] Furthermore, the flexible pressure block has an arc-shaped contact surface on the side away from the adjusting screw, and the surface of the arc-shaped contact surface is provided with a wear-resistant flexible layer.

[0010] Furthermore: the second elastic element is a spring.

[0011] Furthermore: one end of the adjusting screw that extends into the base is formed with a hinged ball, and a spherical groove is formed in the middle of the outer side of the flexible pressure block, and the hinged ball is rotatably fitted into the spherical groove.

[0012] Furthermore: the outer side of the floating positioning ring is formed with at least two cross grooves, the guide rail adopts a T-shaped rail, and the floating positioning ring is slidably installed on the guide rail through the cross grooves.

[0013] Furthermore: a clamping bevel is formed on the guide rail, and the clamping bevel is fitted with a clearance fit in the cross groove. A pre-tightening hole is formed in the cross groove, and a silicone clamping component is fitted with a clearance fit in the pre-tightening hole. The inner side of the silicone clamping component passes through the pre-tightening hole and tightens inward, while the outer side of the silicone clamping component presses against the clamping bevel.

[0014] Furthermore, both the positioning end cap and the floating positioning ring have detachable coaxial sleeves installed on their inner sides, and the inner ring diameters of the two coaxial sleeves are set to be the same.

[0015] Furthermore, the coaxial sleeve of the floating positioning ring is formed with three clearance grooves, and three cross slide grooves, guide slide rails, pre-tightening holes and silicone clamping parts are provided. The inner sides of the three silicone clamping parts are inserted into the clearance grooves in a corresponding gap fit.

[0016] Furthermore: the first elastic element is a spring.

[0017] Furthermore: the inner side of the positioning end cover is formed with several spring grooves, and the floating positioning ring is formed with several positioning rods on the side near the positioning end cover. One end of the first elastic element is installed in the spring groove with a clearance fit, and the other end of the first elastic element is inserted into the positioning rod.

[0018] Compared with the prior art, the beneficial effects of this utility model are: 1. Install the long cylindrical ceramic product into the positioning end cap and floating positioning ring, and then lock the clamping unit to ensure that the ceramic product is in the center position inside the base. When the base rotates at high speed, it can drive the ceramic product to rotate together, thereby achieving a stable clamping effect. 2. The clamping unit is located between the positioning end cover and the floating positioning ring, and the inner diameters of the positioning end cover and the floating positioning ring are the same. Therefore, it can provide the ceramic product with a coaxial calibration effect, ensure the stability of the ceramic product when rotating at high speed, and avoid the occurrence of offset and shaking. 3. The ceramic product to be processed is pushed towards the positioning end cap by elastic force to achieve axial pre-positioning of the product, while adapting to long strip ceramic products of different lengths.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is an exploded structural diagram of the present invention; Figure 4 yes Figure 3A magnified structural diagram at point A; Figure 5 This is an exploded view of the floating positioning ring; Figure 6 This is an exploded structural diagram of the flexible clamping assembly; Figure 7 This is an exploded structural diagram of the present invention from another perspective; Figure 8 yes Figure 7 A magnified structural diagram at point B.

[0022] The figure shows: 1. Base; 2. Positioning assembly; 21. Positioning end cap; 22. Floating positioning ring; 3. Flexible clamping assembly; 31. Clamping unit; 311. Adjusting screw; 312. Flexible pressure block; 313. Second elastic element; 4. Guide slide rail; 5. Positioning hole; 6. First elastic element; 7. Threaded hole; 8. Arc-shaped contact surface; 9. Wear-resistant flexible layer; 10. Cross slide groove; 11. Clamping bevel; 12. Pre-tightening hole; 13. Silicone clamping element; 14. Coaxial sleeve; 15. Clearance groove; 16. Spring groove; 17. Positioning rod; 18. Hinge ball; 19. Spherical groove. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0024] The components of the present invention embodiments described and shown in the accompanying drawings can typically be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention.

[0025] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] like Figure 1-8 As shown, a ceramic internal hole machining fixture of the present invention includes a base 1, a positioning component 2 and a flexible clamping component 3; The base 1 is a hollow cylindrical structure with openings at both ends. The inner wall of the base 1 is provided with at least two axially extending guide rails 4, and each guide rail 4 is evenly distributed along the circumference of the base 1. The positioning component 2 includes a positioning end cap 21 and a floating positioning ring 22. The positioning end cap 21 is fixedly disposed at one end of the port of the base 1, and a positioning hole 5 coaxial with the base 1 is opened in the center of the positioning end cap 21. The floating positioning ring 22 is located inside the base 1. The floating positioning ring 22 is slidably mounted on the guide rail 4. Several first elastic elements 6 are connected between the floating positioning ring 22 and the positioning end cover 21. The first elastic elements 6 are evenly distributed along the circumference of the base 1. The flexible clamping assembly 3 includes at least three sets of clamping units 31, each clamping unit 31 being evenly distributed along the circumferential direction of the base 1, and the clamping unit 31 being disposed between the positioning end cap 21 and the floating positioning ring 22. The principle is as follows: A long cylindrical ceramic product is installed into the positioning end cover 21 and the floating positioning ring 22, and then the clamping unit 31 is locked to ensure that the ceramic product is in the center position within the base 1. When the base 1 rotates at high speed, it can drive the ceramic product to rotate together, thereby achieving a stable clamping effect. Since the clamping unit 31 is located between the positioning end cover 21 and the floating positioning ring 22, and the inner diameters of the positioning end cover 21 and the floating positioning ring 22 are the same, it can provide a coaxial calibration effect for the ceramic product, ensuring the stability of the ceramic product when rotating at high speed and avoiding offset and shaking. The ceramic product to be processed can be pushed towards the positioning end cover 21 through elastic force to achieve axial pre-positioning of the product, while adapting to long strip ceramic products of different lengths.

[0029] Furthermore, the clamping unit 31 includes an adjusting screw 311, a flexible pressure block 312, and a second elastic element 313. The side wall of the base 1 has a threaded hole 7 adapted to the adjusting screw 311. The adjusting screw 311 passes through the threaded hole 7 and is threadedly connected to the base 1. The flexible pressure block 312 is installed at one end of the adjusting screw 311 that extends into the base 1. The second elastic element 313 is sleeved on the outside of the adjusting screw 311, and both ends of the second elastic element 313 abut against the flexible pressure block 312 and the inner wall of the base 1, respectively. The ceramic product can be locked between the flexible pressure blocks 312 of several clamping units 31 by locking each adjusting screw 311. Since the flexible pressure block 312 is made of flexible material, it will not scratch the surface of the ceramic product during clamping.

[0030] Furthermore: the flexible pressure block 312 has an arc-shaped contact surface 8 on the side away from the adjusting screw 311, and the surface of the arc-shaped contact surface 8 is provided with a wear-resistant flexible layer 9; the setting of the arc-shaped contact surface 8 and the wear-resistant flexible layer 9 can increase the contact area between the outer surface of the ceramic product and the flexible pressure block 312, and ensure the stable clamping of the ceramic product.

[0031] Furthermore, the second elastic element 313 is a spring; the setting of the second elastic element 313 can further enhance the stability of the ceramic product clamping, and at the same time, the adjusting bolt will not loosen on its own when the base 1 rotates at high speed.

[0032] Furthermore: the end of the adjusting screw 311 that extends into the base 1 is formed with a hinge ball 18, and the middle part of the outer side of the flexible pressure block 312 is formed with a spherical groove 19. The hinge ball 18 is rotatably fitted in the spherical groove 19; so that the flexible pressure block 312 can always be kept at the same angle, thereby ensuring stable clamping of ceramic products.

[0033] Furthermore: the outer side of the floating positioning ring 22 is formed with at least two cross grooves 10, the guide rail 4 adopts a T-shaped rail, and the floating positioning ring 22 is slidably installed on the guide rail 4 through the cross grooves 10; this can ensure the stable sliding connection of the floating positioning ring 22 on the guide rail 4.

[0034] Furthermore: a clamping bevel 11 is formed on the guide slide rail 4, and the clamping bevel 11 is fitted in the cross slide groove 10 with clearance fit. A pre-tightening hole 12 is formed in the cross slide groove 10, and a silicone clamping member 13 is fitted in the pre-tightening hole 12 with clearance fit. The inner side of the silicone clamping member 13 passes through the pre-tightening hole 12 and tightens inward, while the outer side of the silicone clamping member 13 presses on the clamping bevel 11. When installing ceramic products, manually insert the ceramic product into the floating positioning ring 22, and continue to push the ceramic product so that several silicone clamping parts 13 push the floating positioning ring 22. Due to the setting of the clamping bevel 11, the silicone clamping parts 13 will gradually retract into the pre-tightening hole 12 when the ceramic product is pushed in, so that the ceramic product is completely inserted into the floating positioning ring 22 until the end of the ceramic product protrudes from the positioning hole 5 in the positioning end cover 21. During pre-tightening and locking, the first elastic element 6 is elastically reset, which drives the floating positioning ring 22 away from the positioning end cover 21. At this time, the setting of the pressing inclined edge 11 allows the silicone pressing element 13 to move in the opposite direction in the pre-tightening hole 12, thereby achieving the effect of inward tightening and achieving pre-tightening positioning. Finally, the clamping unit 31 completes the locking action of the ceramic product.

[0035] Furthermore, both the positioning end cap 21 and the floating positioning ring 22 are detachably equipped with coaxial sleeves 14, and the inner diameters of the two coaxial sleeves 14 are the same. The appropriate size of the coaxial sleeve 14 can be replaced according to the diameter of the ceramic product, thus making it suitable for clamping ceramic products of different diameters. The arrangement of the two coaxial sleeves 14 can ensure the stable installation of the ceramic product in the base 1. When the base 1 is running at high speed, the ceramic product clamped inside will not shake, thereby ensuring the accuracy of the inner hole machining.

[0036] Furthermore, the coaxial sleeve 14 of the floating positioning ring 22 is formed with three clearance grooves 15, and three cross slide grooves 10, guide slide rails 4, pre-tightening holes 12 and silicone clamping parts 13 are provided. The inner sides of the three silicone clamping parts 13 are inserted into the clearance grooves 15 with corresponding gaps. The three silicone clamping parts 13 can press the ceramic product by moving inward, thereby ensuring the concentricity of the ceramic product in the base 1 and improving the clamping stability of the ceramic product when the base 1 rotates at high speed.

[0037] Furthermore, the first elastic element 6 is a spring; it can provide effective elastic stress to the floating positioning ring 22, so that the floating positioning ring 22 can be elastically reset after being pressed down, ensuring the stability of the pre-clamping and positioning of the ceramic product.

[0038] Furthermore: the inner side of the positioning end cover 21 is formed with several spring grooves 16, and the side of the floating positioning ring 22 near the positioning end cover 21 is formed with several positioning rods 17. One end of the first elastic member 6 is installed in the spring groove 16 with a clearance fit, and the other end of the first elastic member 6 is inserted into the positioning rod 17 with a clearance fit. This can ensure the stable assembly of the first elastic member 6 between the positioning end cover 21 and the floating positioning ring 22.

[0039] This embodiment does not impose any limitation on the shape, material, structure, etc. of this utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model shall fall within the protection scope of this utility model.

Claims

1. A ceramic internal hole machining fixture, comprising a base, a positioning component, and a flexible clamping component; characterized in that The base is a hollow cylindrical structure with openings at both ends. The inner wall of the base is provided with at least two axially extending guide rails, and each guide rail is evenly distributed along the circumference of the base. The positioning component includes a positioning end cap and a floating positioning ring. The positioning end cap is fixedly disposed at one end of the base, and a positioning hole coaxial with the base is opened in the center of the positioning end cap. The floating positioning ring is located inside the base and is slidably mounted on the guide rail. Several first elastic elements are connected between the floating positioning ring and the positioning end cover. The first elastic elements are evenly distributed along the circumference of the base. The flexible clamping assembly includes at least three sets of clamping units, each clamping unit being evenly distributed along the circumference of the base, and the clamping units being disposed between the positioning end cap and the floating positioning ring.

2. The ceramic inner hole processing jig according to claim 1, characterized in that: The clamping unit includes an adjusting screw, a flexible pressure block, and a second elastic element. The side wall of the base has a threaded hole adapted to the adjusting screw. The adjusting screw passes through the threaded hole and is threadedly connected to the base. The flexible pressure block is installed at one end of the adjusting screw that extends into the base. The second elastic element is sleeved on the outside of the adjusting screw, and both ends of the second elastic element abut against the flexible pressure block and the inner wall of the base, respectively.

3. The ceramic inner hole processing jig according to claim 2, characterized in that: The flexible pressure block has an arc-shaped contact surface on the side away from the adjusting screw, and the surface of the arc-shaped contact surface is provided with a wear-resistant flexible layer.

4. The ceramic inner hole processing jig according to claim 2, characterized in that: The second elastic element is a spring.

5. The ceramic inner hole processing jig according to claim 2, characterized in that: The adjusting screw has a hinged ball formed at one end that extends into the base, and a spherical groove is formed in the middle of the outer side of the flexible pressure block. The hinged ball is rotatably fitted into the spherical groove.

6. The ceramic inner hole processing jig according to claim 1, wherein: The outer side of the floating positioning ring is formed with at least two cross grooves, and the guide rail adopts a T-shaped rail. The floating positioning ring is slidably installed on the guide rail through the cross grooves.

7. The ceramic bore tooling fixture of claim 6, wherein: The guide rail has a clamping bevel formed on it. The clamping bevel is fitted into the cross groove with clearance fit. The cross groove has a pre-tightening hole formed on it. A silicone clamping component is fitted into the pre-tightening hole with clearance fit. The inner side of the silicone clamping component passes through the pre-tightening hole and tightens inward. The outer side of the silicone clamping component presses against the clamping bevel.

8. The ceramic bore tool of claim 7, wherein: Both the positioning end cap and the floating positioning ring have coaxial sleeves that can be detachably installed on their inner sides, and the inner ring diameters of the two coaxial sleeves are the same.

9. A ceramic internal hole machining fixture according to claim 8, characterized in that: The floating positioning ring has three clearance grooves formed on its coaxial sleeve. There are three cross slide grooves, guide slide rails, pre-tightening holes and silicone clamping parts. The inner sides of the three silicone clamping parts are inserted into the clearance grooves in a corresponding gap fit.

10. The ceramic bore tool of claim 1, wherein: The inner side of the positioning end cap is formed with several spring grooves, and the floating positioning ring is formed with several positioning rods on the side near the positioning end cap. One end of the first elastic element is installed in the spring groove with a clearance fit, and the other end of the first elastic element is inserted into the positioning rod.

Images