A jig for grinding a punch nose
By designing a universal fixture, and using a combination of fixed and moving clamping mechanisms with lead screw drive and rotating block, the problem of adapting the fixture to the cutting edges of punches of different specifications was solved, thus improving grinding efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DALIAN DALMO ELECTRIC MOTOR
- Filing Date
- 2025-08-22
- Publication Date
- 2026-07-31
AI Technical Summary
In existing technologies, fixtures cannot adapt to punch cutting edges of different specifications, resulting in low grinding efficiency.
A universal clamp was designed, which employs a fixed clamping mechanism and a movable clamping mechanism. The movable clamping mechanism is driven to move closer to or away from the fixed clamping mechanism by a lead screw assembly, thereby clamping punches of different models. The angle of the clamping mechanism can be adapted to different specifications of punches by a rotating block.
It enables easy clamping of different types of punches, improves grinding efficiency, is versatile, and saves labor and time.
Smart Images
Figure CN224575402U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a clamp, specifically a clamp for grinding the cutting edge of a punch, belonging to the field of mechanical clamping equipment. Background Technology
[0002] When the cutting edge of the punch in a motor lamination die wears down, it needs to be sharpened. Die punches come in a wide variety of specifications, with similar shapes but different angles. Sharpening the cutting edge requires using a fixture, which needs to be made according to the specific specifications. This is labor-intensive and time-consuming, and it fails to meet the universality requirements for sharpening the cutting edges of different punches, thus reducing the processing efficiency of punch edge sharpening. Utility Model Content
[0003] In view of the problem that the fixtures used in the above-mentioned punch edge grinding process cannot be used for different punch specifications, the purpose of this utility model is to design a fixture for punch edge grinding, which is a universal fixture that can be adapted to the clamping of different types of punches.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a fixture for grinding the cutting edge of a punch, comprising: a fixture body, wherein a fixed clamping mechanism and a movable clamping mechanism are provided on the fixture body, the fixed clamping mechanism is movably disposed at one end of the fixture body, and the movable clamping mechanism is movably disposed at the other end of the fixture body, wherein a driving device and a lead screw assembly are provided at one end of the fixture body where the movable clamping mechanism is disposed, and the movable clamping mechanism is disposed on the lead screw assembly; the fixed clamping mechanism and the movable clamping mechanism clamp the punch, and the movable clamping mechanism reciprocates relative to the fixture body under the action of the driving device through the lead screw assembly, so that the movable clamping mechanism moves closer to or further away from the fixed clamping mechanism; Furthermore, the fixing clamping mechanism is fixedly connected to the clamping body; the fixing clamping mechanism includes: a fixing clamping body, a first rotating block, and two cylindrical clamping blocks; the fixing clamping body is located on the clamping body, the first rotating block is disposed in the fixing clamping body, and the first rotating block is located at the edge of the fixing clamping body near the punch direction; two cylindrical clamping blocks are arranged side by side at the edge of the first rotating block near the punch direction, and the outer periphery of the cylindrical clamping blocks is in contact with the punch surface; Furthermore, the fixing clamp is a cuboid structure that covers the width of the clamp body, and the horizontal line where the center point of the fixing clamp in the width direction is located coincides with the horizontal line of the center point of the clamp body. Furthermore, the first rotating block is a fan-shaped structure with an arc, including a straight plane and an arc surface; the straight plane position of the first rotating block corresponds to the edge position of the fixed clamping body near the punch direction, and the first rotating block is located at the center position in the width direction of the fixed clamping body; Furthermore, the two cylindrical clamping blocks are respectively positioned at both ends of the straight plane of the first rotating block, and the cylindrical clamping blocks form a protruding area relative to the position of the straight plane of the first rotating block. Furthermore, the movable clamping mechanism is located on the clamping body at a position parallel to the fixed clamping mechanism and is connected to the lead screw assembly. The movable clamping mechanism moves relative to the clamping body to move closer to the fixed clamping mechanism and clamp the punch. Furthermore, the structure of the movable clamping mechanism is the same as that of the fixed clamping mechanism and is arranged symmetrically in the left and right mirrors of the fixed clamping mechanism; the movable clamping mechanism includes: a movable clamping body, a second rotating block and two cylindrical clamping blocks; the lower part of the movable clamping body is connected to the lead screw assembly; wherein, the cooperation method between the movable clamping body and the second rotating block, and the cooperation method between the cylindrical clamping blocks and the second rotating block are exactly the same as the corresponding cooperation method of the fixed clamping mechanism; Furthermore, the clamping body is provided with a strip-shaped cavity for accommodating the lead screw assembly; Furthermore, the lead screw assembly includes: a screw and a nut; one end of the screw extends into the strip-shaped cavity inside the clamping body, and the nut is screwed onto the screw; the nut engages with the external thread of the screw through an internal thread and is connected to the movable clamping body through a protruding insertion part formed on the outside of the nut, so that the rotation of the screw drives the nut to move, thereby driving the movable clamping body to move along with it; Furthermore, a flange is installed on the screw near the outer end face of the clamp body via a bearing. The inner end face of the flange is close to the outer end face of the clamp body, thereby keeping the screw rotating in place. Furthermore, the drive device employs a handwheel, which is fixedly connected to the head of the screw.
[0005] When the above-mentioned clamping structure is in operation, rotating the handwheel clockwise causes the screw of the lead screw assembly to rotate, which drives the moving clamping mechanism to move closer to the fixed clamping mechanism. The fixed clamping mechanism remains stationary, and the four cylindrical clamping blocks in the clamping mechanisms on both sides contact the punch, thereby clamping the punch. Conversely, rotating the handwheel counterclockwise causes the screw of the lead screw assembly to rotate in the opposite direction, which drives the moving clamping mechanism to move away from the fixed clamping mechanism and disengage from clamping the punch.
[0006] The beneficial effects of this utility model are as follows: The punch is clamped by moving the clamping mechanism closer to or further away from the fixed clamping mechanism; the clamping operation is simple and punch replacement is convenient; the rotating block in the double-sided clamping mechanism can rotate according to the punch face angle of different specifications and models when clamping the punch, so as to be suitable for clamping different models of punches and thus achieve the purpose of punch edge grinding; the fixture has a certain degree of versatility, realizes universal clamping, saves labor and time, and improves punch grinding efficiency. Attached Figure Description
[0007] Figure 1 This is a diagram showing the working state of the clamp holding the punch in one embodiment of the present invention.
[0008] Figure 2 This is a perspective view of the present invention (with the handwheel hidden).
[0009] Figure 3 for Figure 2 A partial cross-sectional view.
[0010] Figure 4 for Figure 2 Another cross-sectional view.
[0011] In the figure, 1. clamp body, 2. punch, 3. fixed clamping body, 4. first rotating block, 5. cylindrical clamping block, 6. corner piece, 7. fastening bolt, 1.1 extension table, 1.2 horizontal line of the center point of the clamp body, 4.1 straight plane, 4.2 arc surface, 4.3 plug connector, 3.1 plug hole, 8. movable holding body, 9. second rotating block, 1.3 strip cavity, 10. screw, 11. nut, 11.1 protruding plug part, 8.1 groove, 12. flange, 13. handwheel. Detailed Implementation
[0012] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.
[0013] Example 1 like Figure 1-4 An embodiment of a jig for grinding the cutting edge of a punch is shown, comprising: a jig body 1, on which a fixed clamping mechanism and a movable clamping mechanism are provided. The fixed clamping mechanism is located near one end of the jig body 1, and the movable clamping mechanism is movably arranged near the other end of the jig body 1. A driving device and a lead screw assembly are provided at one end of the jig body 1 where the movable clamping mechanism is located, and the movable clamping mechanism is arranged on the lead screw assembly. The fixed clamping mechanism and the movable clamping mechanism clamp the punch 2. The movable clamping mechanism reciprocates relative to the jig body 1 under the action of the driving device through the lead screw assembly, so that the movable clamping mechanism moves closer to or away from the fixed clamping mechanism. Furthermore, the fixed clamping mechanism is fixedly connected to the clamping body 1; the fixed clamping mechanism includes: a fixed clamping body 3, a first rotating block 4, and two cylindrical clamping blocks 5; the fixed clamping body 3 is located on the clamping body 1, the first rotating block 4 is provided on the upper surface of the fixed clamping body 3, and the first rotating block 4 is located on the edge of the fixed clamping body 3 near the punch 2; two cylindrical clamping blocks 5 are arranged side by side on the edge of the first rotating block 4 near the punch 2, and the outer periphery of the cylindrical clamping blocks 5 is in contact with the punch surface; Specifically, the fixed clamping body 3 and the clamping body 1 are fixed together by corner pieces 6 and fastening bolts 7; the two sides of the clamping body 1 have an extension platform 1.1 structure, the corner pieces 6 are fitted onto the extension platform 1.1 of the clamping body 1 and the fixed clamping body 3 is fixed by fastening bolts 7; Furthermore, the fixing clamp 3 is a cuboid structure that covers the width of the clamp body, and the horizontal line where the center point of the fixing clamp 3 is located in the width direction coincides with the horizontal line 1.2 of the center point of the clamp body; Furthermore, the first rotating block 4 is a fan-shaped structure with an arc, including a straight plane 4.1 and an arc surface 4.2; the position of the straight plane 4.1 of the first rotating block 4 corresponds to the edge position of the fixed clamping body 3 near the punch 2, and the first rotating block 4 is located in the center position in the width direction of the fixed clamping body 3. Specifically, the first rotating block 4 and the fixed clamping body 3 are embedded in each other. The fixed clamping body 3 has an arc-shaped groove that matches the fan-shaped structure of the first rotating block 4. The arc-shaped surface 4.2 of the first rotating block 4 matches the arc-shaped groove of the fixed clamping body 3. Furthermore, the lower surface of the first rotating block 4 is provided with a downwardly extending plug 4.3. The fixed clamping body 3 is provided with a plug hole 3.1 that matches the plug 4.3. The first rotating block 4 is inserted into the fixed clamping body 3 and slides with the fixed clamping body 3. The first rotating block 4 can rotate freely relative to the fixed clamping body 3. Furthermore, the two cylindrical clamping blocks 5 are respectively positioned at both ends of the straight plane 4.1 of the first rotating block 4, and the cylindrical clamping blocks 5 form a protruding area relative to the position of the straight plane 4.1 of the first rotating block 4; when clamping the punch 2, the protruding area of the cylindrical clamping blocks 5 abuts against the punch surface. Furthermore, the cylindrical clamping block 5 and the first rotating block 4 are embedded in each other; the first rotating block 4 has a mounting hole that matches the outer diameter of the cylindrical clamping block 5 and passes through the upper and lower end faces of the first rotating block 4. The cylindrical clamping block 5 is embedded in the mounting hole and slides in cooperation with the first rotating block 4. The cylindrical clamping block 5 and the first rotating block 4 can rotate freely. Furthermore, the two cylindrical clamping blocks 5 are symmetrically arranged on the first rotating block 4 with respect to the horizontal center line of the first rotating block 4.
[0014] Furthermore, the movable clamping mechanism is located on the clamping body 1, which is parallel to the fixed clamping mechanism, and is connected to the lead screw assembly. The movable clamping mechanism moves relative to the clamping body to move closer to the fixed clamping mechanism and clamp the punch 2. Furthermore, the structure of the movable clamping mechanism is the same as that of the fixed clamping mechanism and is arranged symmetrically in the left and right mirrors of the fixed clamping mechanism; the movable clamping mechanism includes: a movable clamping body 8, a second rotating block 9 and two cylindrical clamping blocks 5; the lower part of the movable clamping body 8 is connected to the lead screw assembly; wherein, the cooperation method between the movable clamping body 8 and the second rotating block 9, and the cooperation method between the cylindrical clamping blocks 5 and the second rotating block 9 are exactly the same as the corresponding cooperation method of the fixed clamping mechanism; Furthermore, the clamping body 1 is provided with a strip-shaped cavity 1.3 for accommodating the lead screw assembly; Furthermore, the lead screw assembly includes a screw 10 and a nut 11; one end of the screw 10 extends into the strip-shaped cavity 1.3 inside the clamping body 1, and the nut 11 is screwed onto the screw 10; the nut 11 engages with the external thread of the screw 10 through its internal thread and is connected to the movable clamping body 3 through a protruding insertion portion 11.1 formed on the outside of the nut 11, so that the rotation of the screw 10 drives the nut 11 to move, thereby driving the movable clamping body 3 to move along with it; Specifically, the movable clamping body 3 and the nut 11 are engaged by a plug-in connection. The lower surface of the movable clamping body 3 is provided with a groove 8.1 that mates with the protruding plug-in portion 11.1 of the nut 11. Furthermore, a flange 12 is provided on the screw 10 near the outer end face of the clamp body 1 via a bearing. The inner end face of the flange 12 is close to the outer end face of the clamp body 1, thereby keeping the screw 10 rotating in place. Furthermore, the drive device employs a handwheel 13, which is fixedly connected to the head of the screw 10.
[0015] When the above-mentioned clamping structure is working, the screw of the lead screw assembly is rotated clockwise by rotating the handwheel 13, which drives the moving clamping mechanism to move closer to the fixed clamping mechanism. The fixed clamping mechanism remains stationary, and the four cylindrical clamping blocks 5 in the clamping mechanisms on both sides are in contact with the punch 2, thereby achieving the clamping of the punch 2. Conversely, the screw of the lead screw assembly is rotated counterclockwise by rotating the handwheel 13, which drives the moving clamping mechanism to move away from the fixed clamping mechanism and disengage from the clamping of the punch 2.
[0016] When the aforementioned movable clamping mechanism and fixed clamping mechanism clamp the punch 2, the two cylindrical clamping bodies 5 on the first rotating block 4 and the two cylindrical clamping bodies 5 on the second rotating block 9 respectively abut against the upper and lower ends of both sides of the punch 2. During the clamping process, the first rotating block 4 and the second rotating block 9 rotate freely with the angle of the punch surface, so that each cylindrical clamping block 5 on the first rotating block 4 and the second rotating block 9 fits tightly with the punch surface to achieve tight clamping.
[0017] As another embodiment of the present invention, the structure of the clamp is basically the same as that of embodiment 1, except that it can clamp a punch of another specification; The ingenious design of this solution lies in the fact that when the fixed clamping mechanism and the movable clamping mechanism clamp the punch 2, the rotating block can rotate to follow the angle and shape of the punch face of different specifications and models of punches, thus making it suitable for clamping different models of punches.
[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", 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 are not intended to 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.
[0019] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.
[0020] In 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0021] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0022] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.
Claims
1. A fixture for grinding the cutting edge of a punch, characterized in that, include: The clamping body is provided with a fixed clamping mechanism and a movable clamping mechanism. The fixed clamping mechanism is located near one end of the clamping body, and the movable clamping mechanism is movably located near the other end of the clamping body. A driving device and a lead screw assembly are provided at one end of the clamping body where the movable clamping mechanism is located, and the movable clamping mechanism is mounted on the lead screw assembly. The fixed clamping mechanism and the movable clamping mechanism clamp a punch together. The movable clamping mechanism reciprocates relative to the clamping body under the action of the driving device through the lead screw assembly, so that the movable clamping mechanism moves closer to or away from the fixed clamping mechanism. The fixed clamping mechanism is fixedly connected to the clamping body; the fixed clamping mechanism includes: a fixed clamping body, a first rotating block and two cylindrical clamping blocks; The fixed clamping body is located on the clamping body. A first rotating block is provided in the fixed clamping body, and the first rotating block is located on the edge of the fixed clamping body near the punch direction. Two cylindrical clamping blocks are arranged side by side on the edge of the first rotating block near the punch direction, and the outer periphery of the cylindrical clamping blocks is in contact with the punch surface.
2. The clamp for grinding the blade edge of a punch according to claim 1, wherein: The fixing clamp is a cuboid structure that covers the width of the clamp body, and the horizontal line where the center point of the fixing clamp in the width direction is located coincides with the horizontal line of the center point of the clamp body.
3. The clamp for grinding the blade edge of a punch according to claim 1, wherein: The first rotating block is a fan-shaped structure with an arc, including a straight plane and an arc surface; the straight plane of the first rotating block corresponds to the edge of the fixed clamping body near the punch, and the first rotating block is located in the center of the width direction of the fixed clamping body.
4. The clamp for grinding the blade edge of a punch according to claim 3, wherein: Two cylindrical clamping blocks are respectively positioned at both ends of the straight plane of the first rotating block, and the cylindrical clamping blocks form a protruding area relative to the position of the straight plane of the first rotating block.
5. The clamp for grinding the blade edge of a punch according to claim 1, wherein: The movable clamping mechanism is located on the clamping body, which is parallel to the fixed clamping mechanism, and is connected to the lead screw assembly.
6. The clamp for grinding the blade edge of a punch according to claim 1, wherein: The structure of the movable clamping mechanism is the same as that of the fixed clamping mechanism, and the movable clamping mechanism and the fixed clamping mechanism are arranged in a mirror image symmetrically. The movable clamping mechanism includes: a movable clamping body, a second rotating block and two cylindrical clamping blocks. The lower part of the movable clamping body is connected to the lead screw assembly.
7. The clamp for grinding the blade edge of a punch according to claim 6, wherein: The clamping body has a strip-shaped cavity inside for accommodating the lead screw assembly.
8. The clamp for grinding the blade edge of a punch according to claim 7, wherein: The lead screw assembly includes a screw and a nut; one end of the screw extends into the strip-shaped cavity inside the clamping body, and the nut is screwed onto the screw; the nut engages with the external thread of the screw through an internal thread and is connected to the movable clamping body through a protruding insertion part formed on the outside of the nut, so that the rotation of the screw drives the nut to move, thereby driving the movable clamping body to move along with it.
9. The clamp for grinding the blade edge of a punch according to claim 1, wherein: The drive device uses a handwheel, which is fixedly connected to the head of the screw.