A self-centering fixture for CNC grinding machines

Abstract

This utility model discloses a self-centering fixture for a CNC grinding machine, relating to the field of CNC grinding machine technology. The utility model includes a base plate, on which a supporting disc is fixedly connected. The top surface of the supporting disc has several grooves, and sliders are slidably connected to the inner walls of each groove. A fixture is fixedly connected to the top surface of each slider. An air pump is fixedly connected to the top surface of the base plate, and a threaded rod is fixedly connected to the top surface of the air pump. A hinge block is slidably connected to the outer wall of the threaded rod, and an internal thread block is threaded onto the outer wall of the threaded rod. The internal thread block is rotatably connected to the bottom surface of the hinge block. Several hinge rods are hinged to the outer wall of the hinge block, and one end of each hinge rod away from the hinge block is hinged to one of the sliders. This utility model, by providing a positioning mechanism, enables multiple fixtures to clamp and position a workpiece placed on the top surface of the supporting disc from multiple directions.

Description

Technical Field

[0001] This utility model belongs to the field of CNC grinding machine technology, and in particular relates to a self-centering fixture for CNC grinding machines. Background Technology

[0002] In the prior art, a search revealed a Chinese patent that discloses "A self-centering fixture for a CNC grinding machine," with application number "CN219805918U." This patent mainly uses a fixed motor to drive a fixed sleeve block to move along the direction of a fixed horizontal plate. Then, the fixed sleeve block drives a fixed support block and a moving stop block to move. Following this, the moving stop block drives a moving slider to move along the inside of a moving groove. At the same time, the moving slider drives a moving clamping plate to adjust and clamp the parts back and forth, making it convenient to adjust, clamp, and position parts of different specifications without having to change different equipment, thus improving the usage effect.

[0003] However, when the above-mentioned device clamps irregularly shaped workpieces, if it only clamps from two sides, the clamping force on the workpiece may be unevenly distributed, resulting in loosening. The loosening of the workpiece will cause the tool to jump and vibrate, which will affect the tool's service life and processing quality. It may also cause deformation and damage to the workpiece, thereby reducing the efficiency and reliability of the entire processing flow. Utility Model Content

[0004] The purpose of this utility model is to provide a self-centering fixture for CNC grinding machines. By setting up a positioning mechanism, multiple fixtures can clamp and position the workpiece placed on the top surface of the support disc from multiple directions, so that it can be positioned at the center of the support disc. This allows the workpiece to be precisely processed after clamping, improves the processing effect of the workpiece, and solves the problem that the workpiece may loosen during subsequent processing.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a self-centering fixture for a CNC grinding machine, including a base plate, on which a positioning mechanism and a fixing mechanism are provided. The positioning mechanism includes a positioning component and a limiting component.

[0007] The positioning assembly includes several connecting rods fixedly connected to the top surface of the base plate. A support disk is fixedly connected to the top of each connecting rod. Several grooves are formed on the top surface of the support disk. A slider is slidably connected to the inner wall of each groove. A clamp is fixedly connected to the top surface of each slider. The bottom surface of the clamp is slidably connected to the top surface of the base plate. An air pump is fixedly connected to the top surface of the base plate. A threaded rod is fixedly connected to the top surface of the air pump. A hinge block is slidably connected to the outer wall of the threaded rod. An internal thread block is threadedly fitted onto the outer wall of the threaded rod. The internal thread block is rotatably connected to the bottom surface of the hinge block. Several hinge rods are hinged to the outer wall of the hinge block. The ends of the hinge rods away from the hinge block are respectively hinged to several sliders.

[0008] Furthermore, the limiting component includes a slide rail fixedly connected to the bottom surface of the hinge block, and a slide groove is provided on the top surface of the internal thread block. The slide rail is adapted to the slide groove, and the slide rail is slidably connected to the inner wall of the slide groove.

[0009] Furthermore, the fixing mechanism includes a fixing component, a resetting component, a connecting component, and a sealing component. The fixing component includes several connecting grooves, each formed inside a plurality of clamps. A piston is slidably connected to the inner wall of each of the several connecting grooves. A positioning rod is fixedly connected to each of the several pistons. The positioning rods slidably extend to the outside of the clamps.

[0010] Furthermore, the reset assembly includes springs that are all fixedly connected to a plurality of pistons, and the ends of the plurality of springs are all fixedly connected to the inner walls of a plurality of connecting grooves.

[0011] Furthermore, the connecting component includes several connecting slots II, each formed inside several clamps, and the several connecting slots II communicate with the interior of several connecting slots I.

[0012] Furthermore, the sealing assembly includes connectors that are fixedly connected to the outer walls of several clamps, and several of the connecting grooves extend into the interior of the connectors.

[0013] Furthermore, the output end of the air pump is fixedly connected to several conduits, and the ends of the several conduits away from the air pump extend into the interior of the connector.

[0014] This utility model has the following beneficial effects:

[0015] 1. By setting up a positioning mechanism, when the internal thread block is rotated, the internal thread block will drive the hinge block to move up and down, so that the hinge rod will drive multiple clamps to move away from or towards each other, thereby enabling multiple clamps to clamp and position the workpiece placed on the top surface of the support disc in multiple directions, so that it can be positioned at the center of the support disc, so that the workpiece can be accurately processed after clamping, improving the processing effect of the workpiece.

[0016] 2. By setting a fixing mechanism, before positioning the workpiece at the center of the support disc, the air pump is turned off, allowing the conduit to communicate with the outside air. Multiple positioning rods on the fixture will fit against the outer surface of the workpiece. When clamping the irregular workpiece, multiple springs are compressed under the action of connecting groove one and piston, making the positioning rods fit tightly against the outer surface of the irregular workpiece. At this time, the gas in connecting groove one will be squeezed into the interior of the connector through multiple connecting groove two. Since the conduit is fixedly connected to the output end of the air pump, the air pump can be turned on at this time, making the multiple conduits and the interior of multiple connecting groove two sealed, preventing gas leakage and preventing the springs from returning to their original position. This allows the multiple positioning rods to stably clamp and fix the irregular workpiece, greatly improving the firmness and stability of the clamping.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the positioning mechanism of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the clamp of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the connector of this utility model;

[0023] Figure 5 This is a cross-sectional structural diagram of the hinge block of this utility model;

[0024] Figure 6 This utility model Figure 3 A magnified structural diagram of point A in the middle.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Base plate; 2. Positioning mechanism; 3. Fixing mechanism; 21. Connecting rod; 22. Supporting disc; 23. Groove; 24. Slider; 25. Clamp; 26. Air pump; 27. Threaded rod; 28. Hinge block; 281. Internal threaded block; 282. Slide rail; 283. Slide groove; 29. ​​Hinge rod; 31. Connecting groove one; 32. Piston; 33. Positioning rod; 34. Spring; 35. Connecting groove two; 36. Connector; 37. Conduit. Detailed Implementation

[0027] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-6 As shown, this utility model is a self-centering fixture for a CNC grinding machine, including a base plate 1, on which a positioning mechanism 2 and a fixing mechanism 3 are provided. The positioning mechanism 2 includes a positioning component and a limiting component.

[0029] The positioning assembly includes several connecting rods 21 fixedly connected to the top surface of the base plate 1. A support disc 22 is fixedly connected to the top of each connecting rod 21. Several grooves 23 are formed on the top surface of the support disc 22. Sliding sliders 24 are slidably connected to the inner walls of each groove 23. Clamps 25 are fixedly connected to the top surfaces of each slider 24. The bottom surface of the clamps 25 is slidably connected to the top surface of the base plate 1. An air pump 26 is fixedly connected to the top surface of the air pump 26. A threaded rod 27 is fixedly connected to the top surface of the air pump 26. A hinge block 28 is slidably connected to the outer wall of the threaded rod 27. An internal threaded block 281 is threaded onto the outer wall of the threaded rod 27. The internal threaded block 281 and the hinge block 281 are connected... The bottom surface of the hinge block 28 is rotatably connected. Several hinge rods 29 are hinged to the outer wall of the hinge block 28. The ends of the hinge rods 29 away from the hinge block 28 are respectively hinged to several sliders 24. The limiting component includes a slide rail 282 fixedly connected to the bottom surface of the hinge block 28. The top surface of the internal thread block 281 is provided with a slide groove 283. The slide rail 282 is adapted to the slide groove 283. The slide rail 282 is slidably connected to the inner wall of the slide groove 283, so that multiple clamps 25 can clamp and position the workpiece placed on the top surface of the support disc 22, so that it can be positioned at the center of the support disc 22, so that the workpiece can be precisely processed after clamping, thereby improving the processing effect of the workpiece.

[0030] The fixing mechanism 3 includes a fixing component, a resetting component, a connecting component, and a sealing component. The fixing component includes several connecting grooves 31, each inside a plurality of clamps 25. Pistons 32 are slidably connected to the inner walls of each connecting groove 31. Positioning rods 33 are fixedly connected to each piston 32 and slidably extend to the outside of the clamps 25. The resetting component includes springs 34 fixedly connected to each piston 32. The ends of each spring 34 are fixedly connected to the inner walls of each connecting groove 31. The connecting component includes components... The internal connecting grooves 35 are connected to the interior of the connecting grooves 31. The sealing assembly includes connectors 36 that are fixedly connected to the outer walls of the clamps 25. The connecting grooves 35 extend into the interior of the connectors 36. The output end of the air pump 26 is fixedly connected to the conduits 37. The ends of the conduits 37 that are away from the air pump 26 extend into the interior of the connectors 36. By setting the fixing mechanism 3, the multiple positioning rods 33 can stably clamp and fix the irregular workpiece, which greatly improves the firmness and stability during clamping.

[0031] A specific application of this embodiment is as follows: By setting a positioning mechanism 2, the slide rail 282 and the slide groove 283 cooperate with each other, so that the internal thread block 281 can only rotate on the bottom surface of the hinge block 28. The slider 24, the clamp 25, the hinge block 28 and the hinge rod 29 cooperate with each other, so that the slider 24 can only slide on the inner wall of several grooves 23, and the hinge block 28 can only slide up and down on the outer wall of the thread rod 27. When the internal thread block 281 is rotated, the internal thread block 281 will drive the hinge block 28 to move up and down, so that the hinge rod 29 will drive multiple clamps 25 to move away from each other or closer to each other, so that multiple clamps 25 can clamp and position the workpiece placed on the top surface of the support disk 22, so that it can be positioned at the center of the support disk 22, so that the workpiece can be precisely processed after clamping, and the processing effect of the workpiece can be improved.

[0032] With the fixing mechanism 3 in place, before the workpiece is positioned at the center of the support disc 22, the air pump 26 is turned off, allowing the conduit 37 to communicate with the outside air. The multiple positioning rods 33 on the clamp 25 will fit against the outer surface of the workpiece. When clamping the irregular workpiece, the multiple springs 34 are compressed under the action of the connecting groove 1 31 and the piston 32, so that the positioning rods 33 fit tightly against the outer surface of the irregular workpiece. At this time, the gas in the connecting groove 1 31 will be squeezed into the interior of the connector 36 through the multiple connecting grooves 2 35. Since the conduit 37 is fixedly connected to the output end of the air pump 26, the air pump 26 can be turned on at this time, so that the multiple conduits 37 and the interior of the multiple connecting grooves 2 35 are sealed, preventing gas leakage and preventing the springs 34 from returning to their original position. This allows the multiple positioning rods 33 to stably clamp and fix the irregular workpiece, greatly improving the firmness and stability of the clamping.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A CNC grinding machine self-centering fixture comprising a base plate (1), characterized in that: The base plate (1) is provided with a positioning mechanism (2) and a fixing mechanism (3), wherein the positioning mechanism (2) includes a positioning component and a limiting component; The positioning component includes several connecting rods (21) fixedly connected to the top surface of the base plate (1). A support disc (22) is fixedly connected to the top of each connecting rod (21). Several grooves (23) are formed on the top surface of the support disc (22). Sliding blocks (24) are slidably connected to the inner walls of each groove (23). Clamps (25) are fixedly connected to the top surfaces of each sliding block (24). The bottom surface of the clamps (25) is slidably connected to the top surface of the base plate (1). The top surface of the base plate (1) is fixedly connected to... An air pump (26) is connected to the air pump (26), and a threaded rod (27) is fixedly connected to the top surface of the air pump (26). A hinge block (28) is slidably connected to the outer wall of the threaded rod (27). An internal thread block (281) is threadedly fitted on the outer wall of the threaded rod (27). The internal thread block (281) is rotatably connected to the bottom surface of the hinge block (28). Several hinge rods (29) are hinged to the outer wall of the hinge block (28). One end of the several hinge rods (29) away from the hinge block (28) is respectively hinged to several sliders (24).

2. The self-centering fixture for a CNC grinding machine according to claim 1, characterized in that, The limiting component includes a slide rail (282) fixedly connected to the bottom surface of the hinge block (28), and a slide groove (283) is provided on the top surface of the internal thread block (281). The slide rail (282) is adapted to the slide groove (283), and the slide rail (282) is slidably connected to the inner wall of the slide groove (283).

3. A self-centering fixture for a CNC grinding machine according to claim 2, characterized in that, The fixing mechanism (3) includes a fixing component, a resetting component, a connecting component and a sealing component. The fixing component includes a plurality of connecting grooves (31) that are all opened inside a plurality of clamps (25). A piston (32) is slidably connected to the inner wall of each of the plurality of connecting grooves (31). A positioning rod (33) is fixedly connected to each of the plurality of pistons (32). The positioning rods (33) slidably extend to the outside of the clamps (25).

4. A self-centering fixture for a CNC grinding machine according to claim 3, characterized in that, The reset assembly includes springs (34) that are fixedly connected to a plurality of pistons (32), and the ends of the plurality of springs (34) are fixedly connected to the inner walls of a plurality of connecting grooves (31).

5. A self-centering fixture for a CNC grinding machine according to claim 4, characterized in that, The connecting component includes several connecting slots (35) that are all opened inside several clamps (25), and the several connecting slots (35) are respectively connected to the interior of several connecting slots (31).

6. A self-centering fixture for a CNC grinding machine according to claim 5, characterized in that, The sealing assembly includes connectors (36) that are fixedly connected to the outer walls of several clamps (25), and several of the connecting grooves (35) extend into the interior of the connectors (36).

7. A self-centering fixture for a CNC grinding machine according to claim 6, characterized in that, The output end of the air pump (26) is fixedly connected to several conduits (37), and the ends of the several conduits (37) away from the air pump (26) extend into the interior of the connector (36).

Images