Quick-change fixture for sharpening machines

Abstract

This utility model discloses a quick-change fixture for a knife grinding machine, comprising: an integrated tool holder with an assembly groove on it, wherein a knife is installed at the bottom of the cavity of the assembly groove; a downward positioning mechanism mounted on the knife; a mounting plate fixedly mounted on one side of the integrated tool holder; a rotary propulsion mechanism inserted into the top of the mounting plate; and a pressing mechanism connected to one end of the rotary propulsion mechanism. This utility model utilizes the combined arrangement of the downward positioning mechanism and the pressing mechanism, and by optimizing the fit between the pin and the center hole of the diamond blade, eliminates assembly gaps, ensuring consistent clamping positions each time, significantly improving the uniformity of blade dimensions after grinding. The linkage design of the elbow clamp and the connecting mechanism allows the downward positioning mechanism to clamp or release the knife simply by lifting and rotating the elbow clamp, greatly shortening the clamping time.

Description

Technical Field

[0001] This utility model relates to the field of fixtures, and in particular to a quick-change fixture for a knife grinding machine. Background Technology

[0002] In the grinding of indexable diamond cutting tools, screw locking is one of the most commonly used clamping methods in traditional fixtures. This method usually uses bolts or set screws to directly clamp the cutting tool. Although it is simple in structure and low in cost, it has many limitations in practical applications, which seriously affect machining efficiency and accuracy.

[0003] First, repeatability and accuracy in positioning are difficult to guarantee. Since screw tightening relies on manual operation, the tightening torque applied during each clamping may vary, resulting in inconsistent contact between the cutting tool and the fixture reference surface. Furthermore, there is usually a small gap between the cutting tool's center hole and the locating pin. After repeated disassembly and assembly, the wear of the screw threads further exacerbates the positioning deviation, ultimately affecting the dimensional uniformity of the sharpened cutting tool and making it difficult to meet the requirements of high-precision machining.

[0004] Secondly, the clamping efficiency is low. Tightening screws requires operators to use wrenches to tighten them multiple times, resulting in a long clamping time per operation. If batch processing is involved, the cumulative time cost is extremely high. At the same time, over-tightening may cause the cutting tool to deform, while under-tightening can easily lead to the risk of loosening during processing, requiring a high level of operator experience.

[0005] Therefore, developing a fixture that enables rapid clamping has become an urgent need to improve the diamond cutting tool grinding process. Utility Model Content

[0006] The purpose of this invention is to provide a quick-change fixture for a knife grinding machine to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a quick-change fixture for a knife grinding machine, comprising:

[0008] An integrated tool holder, wherein an assembly groove is provided on the integrated tool holder, and a tool is installed at the bottom of the inner cavity of the assembly groove;

[0009] A downward positioning mechanism is mounted on the cutting tool;

[0010] Mounting plate, which is fixedly mounted on one side of the integrated tool holder;

[0011] A rotary propulsion mechanism is inserted and installed on the top of the mounting plate;

[0012] A pressing mechanism is connected to one end of a rotary propulsion mechanism. The pressing mechanism is used to press the downward positioning mechanism to achieve the downward movement of the downward positioning mechanism to press and position the tool.

[0013] Preferably, the cutting tool includes:

[0014] A tool holder, which is fixedly installed at the bottom of the inner cavity of the assembly slot;

[0015] A diamond cutting tool, which is mounted on the top of one end of a tool holder.

[0016] Preferably, the top of the tool holder has a groove, and the pressure plate cooperates with the inner cavity of the groove.

[0017] Preferably, the downward positioning mechanism includes:

[0018] A pressure plate, the bottom of which engages with the inner cavity of the groove, and the top of which is provided with an inclined surface;

[0019] The second contact plate is fixedly installed on the inclined surface of the pressure plate, the top of the inner cavity of the assembly groove is fixedly installed with the first contact plate, and the extrusion mechanism is disposed between the first contact plate and the second contact plate.

[0020] A pin is fixedly installed at one end of the pressure plate and is used to press and clamp the diamond cutting tool.

[0021] A spring is connected between a pressure plate and a tool holder, and a guide post is provided inside the spring. One end of the guide post is fixedly connected to the pressure plate, and the other end of the guide post is slidably inserted into the tool holder.

[0022] Preferably, the rotary propulsion mechanism includes:

[0023] An insert rod is provided, and a limiting cylinder is fixedly installed on the top of the mounting plate. The insert rod is slidably inserted into the inner cavity of the limiting cylinder.

[0024] An elbow clamp, one end of which is rotatably connected to one end of a through rod, and the elbow clamp is arranged in an L-shape;

[0025] A connecting mechanism, one end of which is rotatably connected to a limiting cylinder, and the other end of which is rotatably connected to the corner of an elbow clamp;

[0026] A limiting plate is fixedly connected to the other end of the insert rod.

[0027] Preferably, the connecting mechanism includes:

[0028] A connecting frame, wherein the connecting frames are arranged in parallel to each other and the connecting frame is connected between the elbow clamp and the limiting cylinder;

[0029] A limiting frame, which is connected between connecting frames.

[0030] Preferably, the extrusion mechanism includes:

[0031] A connecting rod, one end of which is fixedly connected to a limiting plate;

[0032] An extrusion block, which is fixedly connected to the other end of the connecting rod.

[0033] The technical effects and advantages of this utility model are as follows:

[0034] This invention utilizes a combination of a downward positioning mechanism and a pressing mechanism. By optimizing the fit between the pin and the center hole of the diamond blade, assembly gaps are eliminated, ensuring consistent clamping positions each time. This significantly improves the dimensional uniformity of the blades after sharpening. The linkage design of the elbow clamp and connecting mechanism allows the downward positioning mechanism to clamp or release the tool simply by lifting and rotating the elbow clamp, greatly shortening clamping time and improving production efficiency. Furthermore, the clamping process requires no tools or complex adjustments, reducing the impact of human factors on processing quality and lowering the technical requirements for operators. Attached Figure Description

[0035] Figure 1 This is a front structural diagram of the present utility model.

[0036] Figure 2 This is a schematic diagram of the cutting tool part of this utility model.

[0037] Figure 3 This is a schematic diagram of the rotary propulsion mechanism of this utility model.

[0038] Figure 4 This is a schematic diagram of the three-dimensional structure of the integrated tool holder of this utility model.

[0039] Figure 5 This is a schematic diagram of the three-dimensional structure of the elbow clamp of this utility model.

[0040] Figure 6 This is a three-dimensional structural diagram of the connecting mechanism of this utility model.

[0041] In the diagram: 1. Integrated tool holder; 101. Assembly slot; 11. Tool; 111. Tool holder; 1111. Groove; 112. Diamond insert; 12. First contact plate; 2. Downward positioning mechanism; 21. Pressure plate; 22. Second contact plate; 23. Pin; 24. Spring; 3. Mounting plate; 4. Rotary propulsion mechanism; 41. Insertion rod; 42. Elbow clamp; 43. Connecting mechanism; 431. Connecting frame; 432. Limiting frame; 44. Limiting plate; 5. Extrusion mechanism; 51. Connecting rod; 52. Extrusion block. Detailed Implementation

[0042] 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.

[0043] This utility model provides, for example Figure 1-6 The quick-change fixture for the sharpening machine shown includes: an integrated tool holder 1 with an assembly slot 101 on it, and a tool 11 mounted at the bottom of the cavity of the assembly slot 101; a downward positioning mechanism 2 mounted on the tool 11; a mounting plate 3 fixedly mounted on one side of the integrated tool holder 1; a rotary propulsion mechanism 4 inserted into the top of the mounting plate 3; and a pressing mechanism 5 connected to one end of the rotary propulsion mechanism 4. The pressing mechanism 5 is used to press the downward positioning mechanism 2 to achieve downward pressing and positioning of the tool 11 by the downward movement of the downward positioning mechanism 2. This is achieved by optimizing the relationship between the pin 23 and the diamond insert 112. The matching structure of the core hole eliminates assembly gaps, ensuring consistent clamping positions each time and significantly improving the uniformity of the blade size after sharpening. The linkage design of the elbow clamp 42 and the connecting mechanism 43 allows the clamping or loosening of the tool 11 by the downward positioning mechanism 2 to be completed simply by lifting and rotating the elbow clamp 42, greatly shortening the clamping time and improving production efficiency. The dead point characteristic of the connecting mechanism 43 achieves mechanical self-locking, eliminating the need for continuous external force during processing, effectively preventing micro-displacement or loosening of the diamond blade 112, ensuring processing accuracy and safety. Furthermore, the clamping process requires no tools or complex adjustments, reducing the impact of human factors on processing quality and lowering the technical requirements for operators.

[0044] The cutting tool 11 includes: a tool shank 111, which is fixedly installed at the bottom of the inner cavity of the mounting groove 101; and a diamond cutting blade 112, which is mounted on the top of one end of the tool shank 111. A groove 1111 is provided on the top of the tool shank 111, and the pressure plate 21 cooperates with the inner cavity of the groove 1111. The tool shank 111 provides a mounting position for the diamond cutting blade 112, and the groove 1111 facilitates the vertical downward movement of the pressure plate 21.

[0045] The downward positioning mechanism 2 includes: a pressure plate 21, the bottom of which engages with the inner cavity of the groove 1111, and the top of which has an inclined surface; a second contact plate 22, which is fixedly installed on the inclined surface of the pressure plate 21, and a first contact plate 12 is fixedly installed on the top of the inner cavity of the assembly groove 101, and a pressing mechanism 5 is disposed between the first contact plate 12 and the second contact plate 22; a pin 23, which is fixedly installed on one end of the pressure plate 21 and is used to press and clamp the diamond cutting tool 112; and a spring 24, which is connected between the pressure plate 21 and the tool holder 111, and has a guide post inside the spring 24, one end of which is fixedly connected to the pressure plate 21, and the other end of which is slidably connected to the tool holder 111. The pressure plate 21 facilitates the installation of the pin 23, and the pin 23... To facilitate the clamping and positioning of the diamond cutting tool 112, the inclined surface of the pressure plate 21 allows the second contact plate 22 to be inclined. When the pressing block 52 is in contact with the second contact plate 22, the direction of the force can be changed by the component of the force, so that the horizontal movement of the pressing block 52 can push the vertical movement of the second contact plate 22. The sliding interlock between the guide post and the tool bar 111 facilitates the limiting of the movement of the pressure plate 21 relative to the tool bar 111, making the vertical movement of the pressure plate 21 more stable. The compression deformation of the spring 24 facilitates the elastic support of the pressure plate 21, so that when the pressing block 52 does not press the pressure plate 21, the pressure plate 21 can drive the pin 23 to move upward and reset through the elastic support of the spring 24, thereby releasing the clamping of the diamond cutting tool 112.

[0046] Specifically, the rotary propulsion mechanism 4 includes: an insert rod 41, with a limiting cylinder fixedly installed on the top of the mounting plate 3, and the insert rod 41 slidably inserting into the inner cavity of the limiting cylinder; an elbow clamp 42, one end of which is rotatably connected to one end of the insert rod 41, and the elbow clamp 42 is L-shaped; a connecting mechanism 43, one end of which is rotatably connected to the limiting cylinder, and the other end of which is rotatably connected to the corner of the elbow clamp 42; and a limiting plate 44, which is fixedly connected to the other end of the insert rod 41. The connecting mechanism 43 includes: a connecting frame 431, which is arranged parallel to each other and connected between the elbow clamp 42 and the limiting cylinder; and a limiting frame 432, which is connected between the connecting frames 431 to prevent excessive rotation of the connecting mechanism 43 relative to the insert rod 41. Figure 3As shown, before clamping, the long axis of the elbow clamp 42 is horizontal. At this time, the connecting frame 431 connecting the elbow clamp 42 and the limiting cylinder is inclined. When the diamond cutter 112 needs to be clamped, the elbow clamp 42 is rotated 90 degrees so that the long axis of the elbow clamp 42 is rotated to a vertical position. At this time, the connecting frame 431 is horizontally supported between the elbow clamp 42 and the limiting cylinder. The limiting frame 432 rests on the insert rod 41 to form a dead point and support the elbow clamp 42. By pulling the insert rod 41 at the end of the elbow clamp 42, the insert rod 41 slides linearly towards the elbow clamp 42 under the limitation of the limiting cylinder, so as to pull the extrusion mechanism 5 linearly. The limiting plate 44 can limit the sliding of the insert rod 41 to prevent the insert rod 41 from sliding excessively.

[0047] The extrusion mechanism 5 includes: a connecting rod 51, one end of which is fixedly connected to the limiting plate 44; and an extrusion block 52, which is fixedly connected to the other end of the connecting rod 51. The connecting rod 51 facilitates the pulling of the extrusion block 52, and the extrusion block 52 facilitates the extrusion of the second contact plate 22, so as to push the downward positioning mechanism 2 to move downward.

[0048] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are 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 quick-change fixture for a knife grinding machine, characterized in that, include: An integrated tool holder (1) is provided with an assembly groove (101) and a tool (11) is installed at the bottom of the inner cavity of the assembly groove (101). A downward positioning mechanism (2) is mounted on the cutting tool (11); Mounting plate (3), which is fixedly mounted on one side of the integrated tool holder (1); A rotary propulsion mechanism (4) is inserted and installed on the top of the mounting plate (3); The extrusion mechanism (5) is connected to one end of the rotary propulsion mechanism (4). The extrusion mechanism (5) is used to extrude the downward positioning mechanism (2) so as to realize the downward positioning mechanism (2) pressing and positioning the tool (11) by moving downward.

2. The quick-change fixture for a knife grinding machine according to claim 1, characterized in that, The cutting tool (11) includes: A tool holder (111) is fixedly installed at the bottom of the inner cavity of the assembly slot (101); A diamond cutting tool (112) is mounted on the top of one end of a tool holder (111).

3. The quick-change fixture for a knife grinding machine according to claim 2, characterized in that, The top of the tool holder (111) is provided with a groove (1111).

4. The quick-change fixture for a knife grinding machine according to claim 3, characterized in that, The downward positioning mechanism (2) includes: The bottom of the pressure plate (21) is engaged with the inner cavity of the groove (1111), and the top of the pressure plate (21) is provided with an inclined surface; The second contact plate (22) is fixedly installed on the inclined surface of the pressure plate (21), the top of the inner cavity of the assembly groove (101) is fixedly installed with the first contact plate (12), and the extrusion mechanism (5) is disposed between the first contact plate (12) and the second contact plate (22). Pin (23), which is fixedly installed at one end of pressure plate (21), is used to press and clamp the diamond blade (112); Spring (24) is connected between pressure plate (21) and knife bar (111), and a guide post is provided inside the spring (24). One end of the guide post is fixedly connected to pressure plate (21), and the other end of the guide post is slidably inserted into knife bar (111).

5. The quick-change fixture for a knife grinding machine according to claim 1, characterized in that, The rotary propulsion mechanism (4) includes: Insertion rod (41), the top of the mounting plate (3) is fixedly installed with a limiting cylinder, and the insertion rod (41) is slidably inserted into the inner cavity of the limiting cylinder; Elbow clamp (42), one end of which is rotatably connected to one end of the insert rod (41), and the elbow clamp (42) is arranged in an L-shape; A connecting mechanism (43) is provided, one end of which is rotatably connected to a limiting cylinder, and the other end of which is rotatably connected to the corner of an elbow clamp (42). A limiting plate (44) is fixedly connected to the other end of the insert rod (41).

6. The quick-change fixture for a knife grinding machine according to claim 5, characterized in that, The connecting mechanism (43) includes: A connecting frame (431) is arranged in parallel to each other and is connected between the elbow clamp (42) and the limiting cylinder; A limiting frame (432) is connected between connecting frames (431).

7. The quick-change fixture for a knife grinding machine according to claim 1, characterized in that, The extrusion mechanism (5) includes: A connecting rod (51), one end of which is fixedly connected to a limiting plate (44); The extrusion block (52) is fixedly connected to the other end of the connecting rod (51).

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