Clamp capable of adaptively fixing grinding tool

Abstract

The utility model discloses a fixture capable of adaptively fixing a grinding tool. The fixture comprises a fixture main body and an expansion part, the clamp body comprises a disc base and a cutter handle, a through hole is formed in the disc base along the central axis, and the cutter handle is arranged on the disc base through the hole. The expansion part comprises an inner supporting sleeve and a conical screw; the bottom edge of the inner supporting sleeve is fixedly connected with the disc base, the inner supporting sleeve comprises a plurality of inner supporting assemblies, the inner supporting assemblies are fixed to the periphery of the conical screw, the radial width of one end of the conical screw is gradually increased in the direction away from the disc base, and when the conical screw is pressed downwards, the conical screw is fixed to the disc base. The inner supporting assemblies elastically expand outwards. Due to the arrangement of the conical screw and the inner supporting sleeve, the radial gap between the clamp and the grinding tool is reduced, and looseness of the clamp and the grinding tool in the machining process is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of clamping technology and relates to a clamping device that can adaptively fix grinding molds. Background Technology

[0002] In the grinding process, the grinding wheel needs to be fixed to the machine tool spindle using a fixture to ensure machining accuracy. In existing technologies, fixtures typically employ a fixed radial dimension design, with a constant outer diameter, relying on a connection and fit with the grinding wheel for installation. However, when the outer diameter of the fixture and the outer diameter of the grinding wheel cannot be precisely matched, a radial clearance easily forms between them. This clearance can cause the grinding wheel to loosen after installation on the fixture, especially during high-speed rotation or under grinding forces. The grinding wheel may then experience eccentric movement, resulting in excessive concentricity between the outer ring and inner hole of the machined grinding wheel, severely affecting its geometric accuracy and performance. Currently, multiple sets of dedicated fixtures are typically required for grinding wheels of different sizes, or clearance is compensated for through manual adjustment and the addition of shims. This not only increases fixture costs and management difficulty but also makes it difficult to guarantee the accuracy of manual adjustments, leading to low machining efficiency and inconsistent quality. Summary of the Invention

[0003] The purpose of this invention is to provide a fixture that can adaptively fix the grinding wheel, in order to solve the problem in the prior art where there is a gap between the fixture and the grinding wheel during processing, which causes the grinding wheel to move eccentrically.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a clamp for adaptively fixing a grinding tool, comprising a clamp body and an expansion portion; the clamp body includes a disc base and a tool holder, the disc base having a through hole along its central axis, the tool holder being mounted on the disc base through the hole; the expansion portion includes an inner support sleeve and a tapered screw; the bottom edge of the inner support sleeve is fixedly connected to the disc base, the inner support sleeve including multiple inner support components, the inner support components being fixed around the tapered screw, the radial width of one end of the tapered screw gradually increasing away from the disc base, and when the tapered screw is pressed down, all the inner support components elastically expand outward.

[0005] Furthermore, the tapered screw includes a threaded portion, a connecting portion, and a tapered portion connected in sequence. The threaded portion is threadedly connected to the tool holder, and the radial width of the tapered portion gradually increases in the direction away from the disc base and is frustum-shaped.

[0006] Furthermore, the central angle of the cone portion ranges from 25° to 35°.

[0007] Furthermore, the cone portion is provided with a groove.

[0008] Furthermore, the inner support sleeve is made of spring steel.

[0009] Furthermore, there are four inner support components, and each adjacent inner support component is provided with a through gap.

[0010] Furthermore, the connection between the inner support sleeve and the disc base is provided with metal adhesive.

[0011] Furthermore, the clamp is also provided with a plurality of reinforcing pins for connecting the inner support sleeve and the disc base.

[0012] The beneficial effects of this utility model are as follows: By providing tapered screws and inner support sleeves, this utility model reduces the radial clearance between the fixture and the grinding wheel, thereby reducing the loosening of the fixture and the grinding wheel during processing. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the clamp provided by this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the clamping body provided by this utility model;

[0015] Figure 3 A schematic diagram of the structure of the inner support sleeve provided by this utility model;

[0016] Figure 4 A structural schematic diagram of the inner support sleeve provided by this utility model from another angle;

[0017] Figure 5 A schematic diagram of the structure of the tapered screw provided by this utility model;

[0018] The reference numerals in the attached drawings are explained as follows: 10-clamping body; 110-disc base; 120-tool holder; 20-expansion part; 210-inner support sleeve; 211-inner support assembly; 220-tapered screw; 221-threaded part; 222-connecting part; 223-tapered part; α-central angle of the tapered part; h-radial width; 2231-groove. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. It should be understood that this application is not limited to the exemplary embodiments disclosed herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0020] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] This utility model provides an appendix. Figures 1-5 In this embodiment of the present invention, a fixture for adaptively fixing a grinding tool includes a fixture body 10 and an expansion portion 20. The fixture body 10 includes a disc base 110 and a tool holder 120. The disc base 110 has a through hole along its central axis, and the tool holder 120 is mounted on the disc base 110 through the hole. The expansion portion 20 includes an inner support sleeve 210 and a tapered screw 220. The bottom edge of the inner support sleeve 210 is fixedly connected to the disc base 110. The inner support sleeve 210 includes a plurality of inner support components 211. The inner support components 211 are fixed around the tapered screw 220. The radial width h of one end of the tapered screw 220 gradually increases in the direction away from the disc base 110. When the tapered screw 220 is pressed down, the inner support components 211 all elastically expand outward.

[0024] Specifically, this utility model provides a self-adaptive fixture for fixing grinding tools, including a fixture body 10 and an expansion part 20. The fixture body 10 includes a disc base 110 and a tool holder 120. The disc base 110 is disc-shaped and has a through hole along its central axis. The through hole passes through the disc base 110, and the columnar tool holder 120 is connected to the disc base 110 through the through hole. The expansion part 20 includes an inner support sleeve 210 and a tapered screw 220. The inner support sleeve 210 is generally disc-shaped and its size is adapted to the disc base 110. The bottom edge of the inner support sleeve 210 is fixedly connected to the edge of the disc base 110. The inner support sleeve 210 includes two or more inner support components 211. Multiple inner support components 211 are combined into a disc shape and fixed around the tapered screw 220, forming a through hole along the central axis. The tapered screw 220 is provided at the through hole. The radial width h of one end of the tapered screw 220 is smaller near the disk base 110 and gradually increases in the axial direction away from the disk base 110. After the fixture and the mold are installed, the central axis of the fixture body 10 and the expansion part 20, as well as the central axis of the fixture and the mold, are in the same position. When the tapered screw 220 is pressed down, the larger end of the tapered screw 220 will also be squeezed into the through hole formed by the inner support component 211, causing the support component 211 to expand elastically outward.

[0025] This utility model provides a self-adaptive fixture for fixing grinding tools, which includes an expandable inner support sleeve 210 and a tapered screw 220 with one end extending larger. When the grinding tool is fixed to the edge of the fixture, i.e., the circumferential edge of the inner support sleeve 210, if the connection between the inner support sleeve 210 and the grinding tool is not tight enough and there is a large radial gap, a wrench or other tool is needed to apply a downward force to the larger end of the tapered screw 220 and squeeze the inner support sleeve 210, so that the inner support sleeve 210 expands outward by a certain space. In this way, the radial gap between the grinding tool and the inner support sleeve 210 is reduced and the connection is stabilized, which can ensure grinding accuracy and quality during processing and improve processing efficiency.

[0026] In one embodiment, the tapered screw 220 includes a threaded portion 221, a connecting portion 222, and a tapered portion 223 connected in sequence. The threaded portion 221 is threadedly connected to the tool holder 120. The radial width of the tapered portion 223 gradually increases towards the direction of the disc base 110 and is frustoconical in shape.

[0027] Specifically, the tapered screw 220 comprises three integrally formed parts: a threaded portion 221, a connecting portion 222, and a tapered portion 223. The threaded portion 221 has threads and is threadedly connected to one end of the tool holder 120. The connecting portion 222 is cylindrical and is used to connect the threaded portion 221 and the tapered portion 223. One end of the tapered portion 223 is connected to the connecting portion 222, and the other end gradually increases in size away from the disc base 110. Alternatively, the other end of the tapered portion 223 can be interpreted as gradually increasing in size along the axial direction away from the threaded portion 221 and the connecting portion 222, forming a frustum-shaped structure. The threaded portion 221 is used to position and install the tapered screw 220, ensuring a secure connection between the tapered screw 220 and the fixture body 10, thereby facilitating subsequent work. The extended and enlarged structure of the tapered portion 223 reduces radial clearance, preventing micro-movement of the grinding wheel during machining, ensuring the positioning accuracy of the grinding path, and reducing contour errors caused by loose grinding wheel installation.

[0028] In the appendix Figure 5 In the embodiment shown, the central angle α of the cone 223 is 30°.

[0029] In one embodiment, the central angle α of the cone 223 is 25°.

[0030] In one embodiment, the central angle α of the cone 223 is 35°.

[0031] Specifically, the cone 223 is shaped like a frustum, and the angle range of the central angle α of the cone 223 is limited, which can precisely control the size range of the inner support sleeve 210 opening and prevent damage to the fixture or mold.

[0032] In one embodiment, the cone 223 is provided with a groove 2231.

[0033] Specifically, one end of the cone 223 is provided with a groove 2231. The groove 2231 is hexagonal and serves as an interface for an internal hex wrench. A hex wrench or an electric screwdriver can be installed in the groove 2231. The conical screw 220 is tightened by the wrench or the electric screwdriver, thereby causing the inner support sleeve 210 to expand outward.

[0034] In one embodiment, the inner support sleeve 210 is made of spring steel.

[0035] Specifically, the inner support sleeve 210 is made of spring steel, which has the characteristics of high elasticity, fatigue resistance and strong recovery, significantly improving the reliability and adaptability of the inner support sleeve 210.

[0036] In the appendix Figure 4 In the illustrated embodiment, there are four inner support components 211, and a gap is provided between each adjacent inner support component 211.

[0037] Specifically, four inner support components 211 are distributed along the circumference to form a symmetrical support structure. When the operator tightens the tapered screws 220, the larger end of the tapered portion 223 of the tapered screw 220 gradually extends into the through hole formed between the four inner support components 211. After being compressed, the inner support components 211 expand outward. The gap provides expansion space for each inner support component 211, allowing the inner support components 211 to self-adaptively fine-tune, thereby making the mold more tightly fixed and reducing radial gaps.

[0038] In one embodiment, the connection between the inner support sleeve 210 and the disc base 110 is provided with metal adhesive.

[0039] The inner support sleeve 210 and the disc base 110 are connected by metal adhesive, which eliminates the need for drilling, tapping, and tightening, reducing installation time. The high-strength metal adhesive bonding also fills irregular contact surfaces, reducing force concentration.

[0040] In one embodiment, the clamp is further provided with a plurality of reinforcing pins for connecting the inner support sleeve 210 and the disc base 110.

[0041] The reinforcing pins are used to connect the inner support sleeve 210 and the disc base 110. The reinforcing pins work together with the metal adhesive to form a double connection of fitting and bonding, increasing the overall fixing strength.

[0042] In summary, this utility model provides a fixture for adaptively fixing grinding tools. During the assembly of the grinding tool, if there is a radial gap between the inner support sleeve 2231 and the grinding tool, the gap can be reduced by axial tightening of the tapered screw 220 and outward expansion of the inner wall of the inner support sleeve 2231, forming a tight and firm fit, which significantly improves processing efficiency and processing quality.

[0043] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0044] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fixture for adaptively fixing a grinding wheel, characterized in that, The fixture includes a main body and an expansion section. The main body includes a disc base and a tool holder. The disc base has a through hole along its central axis, and the tool holder is mounted on the disc base through the through hole. The expansion section includes an inner support sleeve and a tapered screw. The bottom edge of the inner support sleeve is fixedly connected to the disc base. The inner support sleeve includes multiple inner support components, which are fixed around the tapered screw. The radial width of one end of the tapered screw gradually increases in the direction away from the disc base. When the tapered screw is pressed down, the inner support components all elastically expand outward.

2. The fixture for adaptively fixing a grinding wheel according to claim 1, characterized in that, The tapered screw includes a threaded portion, a connecting portion, and a tapered portion connected in sequence. The threaded portion is threadedly connected to the tool holder. The radial width of the tapered portion gradually increases in the direction away from the disc base and is truncated cone-shaped.

3. The fixture for adaptively fixing abrasive molds according to claim 2, characterized in that, The central angle of the cone is in the range of 25°-35°.

4. The fixture for adaptively fixing abrasive molds according to claim 3, characterized in that, The cone portion is provided with a groove.

5. A fixture for adaptively fixing a grinding wheel according to claim 1, characterized in that, The inner support sleeve is made of spring steel.

6. A fixture for adaptively fixing a grinding wheel according to claim 5, characterized in that, There are four internal support components, and each adjacent internal support component has a through gap.

7. A fixture for adaptively fixing a grinding wheel according to claim 1, characterized in that, The connection between the inner support sleeve and the disc base is provided with metal adhesive.

8. A fixture for adaptively fixing a grinding wheel according to claim 1, characterized in that, The clamp is also provided with a plurality of reinforcing pins for connecting the inner support sleeve and the disc base.

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