A tooling fixture for CNC die sinking

Abstract

The utility model discloses a kind of CNC mould core processing's tool fixture, including bottom plate, positioning plate, first clamping device and second clamping device. Bottom plate is used to be fixed in grinder;Positioning plate upper surface is equipped with rectangular positioning recess, its two side walls are respectively first positioning stop and second positioning stop, 90 ° positioning card angle is formed by two;First clamping device is arranged in the opposite side of first positioning stop, is equipped with the first push plate parallel with first positioning stop;Second clamping device is arranged in the opposite side of second positioning stop, is equipped with the second push plate parallel with second positioning stop;First push plate and second push plate are respectively matched with first positioning stop, second positioning stop by linear motion, realize the clamping fixation of mould core.The utility model uses mechanical clamping structure to replace traditional magnetic attraction mode, positioning is accurate, clamping is stable, and it is labor-saving and convenient to operate, suitable for the efficient processing of CNC mould core.

Description

Technical Field

[0001] This utility model relates to the field of mold processing equipment technology, and in particular to a tooling fixture for CNC mold core processing. Background Technology

[0002] CNC machining is often used for machining mold cores. After cutting a suitable rectangular blank, the blank is tooled into the fixture device of the CNC lathe and fixed in a preset position on the grinding machine to be processed according to the preset milling path.

[0003] Currently, the fixture device used for CNC machining of mold cores generally includes two strong magnets. The surface of the strong magnets has right-angled positioning notches. The strong magnets are locked onto the grinding machine by pressure plates. The positioning notches of the two strong magnets form the tooling positioning part of the blank. The blank is placed in the tooling positioning part and fixed by the magnetic attraction between it and the strong magnets.

[0004] However, the current magnetic clamping device is affected by the strong magnet and the weight of the billet itself during the picking and placing process, requiring a large external force to pick and place, which is inconvenient to operate. Therefore, it is necessary to improve it. Utility Model Content

[0005] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a tooling fixture for CNC mold core machining. It uses a clamping fixture structure to replace the magnetic fixture structure, avoiding the influence of strong magnetic forces and making the changeover process more labor-saving and convenient.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a tooling fixture for CNC mold core machining, comprising a base plate, a positioning plate, a first clamping device, and a second clamping device; the base plate is used to fix the fixture on a grinding machine; the positioning plate is formed on the upper surface of the base plate, and the upper surface of the positioning plate is provided with a recessed positioning groove, the positioning groove being rectangular in shape, one side wall of the positioning groove being a first positioning stop, and the adjacent other side wall being a second positioning stop, with a 90° positioning angle formed between the first positioning stop and the second positioning stop; the first clamping device is provided with... The positioning plate is located on the opposite side of the first positioning stop. The first clamping device is provided with a first push plate, which moves in a straight line toward the first positioning stop. The first push plate is parallel to the first positioning stop, and the two clamp each other by moving closer or further apart. The second clamping device is located on the opposite side of the positioning plate of the second positioning stop. The second clamping device is provided with a second push plate, which moves in a straight line toward the second positioning stop. The second push plate is parallel to the second positioning stop, and the two clamp each other by moving closer or further apart.

[0007] In a further technical solution, the first clamping device and the second clamping device include a push-top structure with the same structure. The push-top structure includes a push plate unit, a base, and a push-top driving device. The base is formed on the upper surface of the positioning plate, and guide holes that pass through the front and rear are respectively opened on both sides of the base. Guide rods are respectively provided on both sides of the rear side of the push plate unit, and the guide rods on both sides are slidably inserted into the corresponding guide holes. The push-top driving device is drivenly connected to the push plate unit to realize the clamping engagement between the push plate unit and the first positioning stop or the second positioning stop.

[0008] In a further technical solution, the push-up drive device includes a drive screw and a drive threaded pair. A through hole for the screw is provided in the middle of the base, and the through hole is parallel to the guide hole. One end of the drive screw is fixed to the rear side of the push plate unit and movably inserted into the through hole. The outer wall of the drive screw is formed with an external thread structure. An extension seat is provided at the top of the base, which extends towards the rear side of the base. A rotating connector is provided at the extension end. The drive threaded pair is rotatably installed on the rotating connector. The drive threaded pair has an internal threaded hole and is threaded to the drive screw. By manually twisting the drive threaded pair, the push plate unit can be driven to move forward or backward.

[0009] In a further technical solution, a rotary connector is formed on the bottom surface of the extended end of the extension seat, and the rotary connector has a through rotary connection hole; the drive threaded pair includes a limiting ring, a tube body, and a sleeve arranged in sequence, the limiting ring is threadedly installed on the front side of the tube body, the outer diameter of the limiting ring is larger than the outer diameter of the tube body, and the limiting ring is in a limiting fit with the front side of the rotary connector; the tube body is rotatably inserted into the rotary connection hole; the sleeve is formed and connected to the rear side of the tube body, the outer diameter of the sleeve is larger than the outer diameter of the tube body, and the sleeve is in a limiting fit with the rear side of the rotary connector; the internal threaded hole is formed in the inner cavity of the integral piece formed by the tube body and the sleeve.

[0010] In a further technical solution, the outer wall of the sleeve is formed with a concave-convex surface structure to increase friction.

[0011] In a further technical solution, at least one drainage channel is provided on the surface of the positioning plate, the drainage channel extending through the side wall of the positioning plate and connecting to the positioning groove.

[0012] In a further technical solution, the base plate has multiple fastening notches around its perimeter, and each fastening notch is equipped with a trapezoidal screw. The base plate is then locked and installed on the grinding machine by the trapezoidal screws.

[0013] The advantages of this invention compared to the prior art after adopting the above structure are:

[0014] 1. This utility model, by setting the first positioning stop and the second positioning stop to form a 90° positioning angle, can accurately position the mold blank at right angles, ensuring uniform processing reference and precise positioning; at the same time, the blank is mechanically clamped from the other two sides by the first push plate of the first clamping device and the second push plate of the second clamping device, respectively, which effectively avoids displacement or loosening of the blank during processing, and improves processing accuracy and product consistency.

[0015] 2. Compared with the existing technology that relies on strong magnetic adsorption and requires overcoming a large magnetic force to pick up and put down the mold core, this utility model adopts a mechanical push plate clamping structure. The push plate can be controlled by manually rotating the drive thread pair, without overcoming the influence of magnetic force. This makes the clamping and disassembly of the mold core more labor-saving, the operation more convenient, and greatly improves the efficiency of changing the mold core.

[0016] 3. Both the first clamping device and the second clamping device adopt the same push-out structure, including a push plate unit, a base and a push-out drive device. The push-out drive device adopts a combination of a drive screw and a drive thread pair, and realizes the smooth advancement and retraction of the push plate through helical transmission. It is not only compact in structure, but also the clamping force can be adjusted as needed to adapt to the clamping requirements of mold cores of different materials and sizes, thus enhancing the versatility and adaptability of the tooling. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0020] Figure 3 yes Figure 2 Enlarged view of point A in the image. Detailed Implementation

[0021] The following are merely preferred embodiments of the present invention and do not limit the scope of protection of the present invention.

[0022] like Figures 1 to 3As shown, a CNC mold core machining fixture includes a base plate 1, a positioning plate 2, a first clamping device 3, and a second clamping device 4. The base plate 1 is used to fix the fixture to a grinding machine 9. The positioning plate 2 is formed on the upper surface of the base plate 1. The upper surface of the positioning plate 2 has a recessed positioning groove 20. The positioning groove 20 is rectangular. One side wall of the positioning groove 20 is a first positioning stop 201, and the adjacent other side wall is a second positioning stop 202. A 90° positioning angle is formed between the first positioning stop 201 and the second positioning stop 202. The first clamping device 3 is located on the positioning plate 2 at the first positioning stop 202. On the opposite side of 01, the first clamping device 3 is provided with a first push plate 31. The first push plate 31 moves in a straight line toward the first positioning stop 201. The first push plate 31 and the first positioning stop 201 are parallel and clamp each other closer or further apart. The second clamping device 4 is provided on the opposite side of the positioning plate 2 located on the second positioning stop 202. The second clamping device 4 is provided with a second push plate 41. The second push plate 41 moves in a straight line toward the second positioning stop 202. The second push plate 41 and the second positioning stop 202 are parallel and clamp each other closer or further apart.

[0023] This invention, by setting the first positioning stop 201 and the second positioning stop 202 to form a 90° positioning angle, can accurately position the mold blank at right angles, ensuring uniform processing reference and precise positioning. At the same time, the blank is mechanically clamped from the other two sides by the first push plate 31 of the first clamping device 3 and the second push plate 41 of the second clamping device 4, respectively, which effectively avoids displacement or loosening of the blank during processing and improves processing accuracy and product consistency.

[0024] Compared with existing technologies that rely on strong magnetic adsorption and require overcoming significant magnetic force to pick up and put down mold cores, this utility model adopts a mechanical push plate clamping structure. The push plate can be controlled to move forward and backward by manually rotating the drive threaded pair 36, without having to overcome the influence of magnetic force. This makes the clamping and disassembly of mold cores more labor-saving, more convenient to operate, and greatly improves the efficiency of mold changing.

[0025] In this embodiment, when using the tooling fixture, a fixture device equipped with a positioning groove 20 of appropriate size and specifications should be selected; the fixture device should be locked and installed in the trapezoidal groove of the grinding machine 9 by trapezoidal screws 11; then, the mold blank plate should be aligned with the positioning corner limit with the machining surface facing upward; the drive thread pair 36 of the first clamping device 3 and the second clamping device 4 should be twisted in sequence so that the corresponding first push plate 31 and the second push plate 41 abut against the corresponding side of the mold blank plate to complete the tooling.

[0026] Specifically, the first clamping device 3 and the second clamping device 4 include a push-top structure with the same structure. The push-top structure includes a push plate unit, a base 30 and a push-top driving device. The base 30 is formed on the upper surface of the positioning plate 2, and guide holes that pass through the front and rear are respectively opened on both sides of the base 30. Guide rods 32 are respectively provided on both sides of the rear side of the push plate unit, and the guide rods 32 on both sides are slidably inserted into the corresponding guide holes. The push-top driving device is connected to the push plate unit to realize the clamping cooperation between the push plate unit and the first positioning stop 201 or the second positioning stop 202.

[0027] Specifically, the push-pull drive device includes a drive screw 33 and a drive threaded pair 36. A through screw hole 350 extending from front to back is also provided in the middle of the base 30. The through screw hole 350 is parallel to the guide hole. One end of the drive screw 33 is fixed to the rear side of the push plate unit and movably inserted into the through screw hole 350. The outer wall of the drive screw 33 is formed with an external thread structure. An extension seat 34 is provided at the top of the base 30. The extension seat 34 extends toward the rear side of the base 30. A rotating connector 35 is provided at its extended end. The drive threaded pair 36 is rotatably installed on the rotating connector 35. The drive threaded pair 36 is provided with an internal threaded hole and is threadedly connected to the drive screw 33. By manually twisting the drive threaded pair 36, the push plate unit can be driven to move forward or backward.

[0028] Specifically, the rotary connector 35 is formed on the bottom surface of the extended end of the extension seat 34, and the rotary connector 35 has a rotary connection hole that runs through the front and rear. The drive threaded pair 36 includes a limiting ring 361, a tube body 360, and a sleeve 362 arranged sequentially. The limiting ring 361 is threadedly installed on the front side of the tube body 360. The outer diameter of the limiting ring 361 is larger than the outer diameter of the tube body 360. The limiting ring 361 is in a limiting fit with the front side of the rotary connector 35. The tube body 360 is rotatably inserted into the rotary connection hole. The sleeve 362 is formed and connected to the rear side of the tube body 360. The outer diameter of the sleeve 362 is larger than the outer diameter of the tube body 360. The sleeve 362 is in a limiting fit with the rear side of the rotary connector 35. The internal threaded hole is formed in the inner cavity of the integral piece formed by the tube body 360 and the sleeve 362.

[0029] Specifically, the outer wall of the sleeve 362 is formed with a concave-convex surface structure to increase friction.

[0030] Both the first clamping device 3 and the second clamping device 4 adopt the same push-out structure, including a push plate unit, a base 30 and a push-out drive device. The push-out drive device adopts a combination of a drive screw 33 and a drive threaded pair 36, which realizes the smooth advancement and retraction of the push plate through helical transmission. It is not only compact in structure, but also the clamping force can be adjusted as needed to adapt to the clamping requirements of mold cores of different materials and sizes, thus enhancing the versatility and adaptability of the tooling.

[0031] Specifically, at least one drainage channel 203 is provided on the surface of the positioning plate 2. The drainage channel 203 extends through the side wall of the positioning plate 2 and connects to the positioning groove 20.

[0032] Specifically, the base plate 1 has multiple fastening notches around its perimeter, and each fastening notch is provided with a trapezoidal screw 11. The base plate 1 is locked and installed on the grinding machine 9 by the trapezoidal screw 11.

[0033] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. A tooling fixture for CNC mold core machining, characterized in that: Includes a base plate, a positioning plate, a first clamping device, and a second clamping device. The base plate is used to fix the fixture on the grinding machine; A positioning plate is formed on the upper surface of the base plate. The upper surface of the positioning plate is provided with a recessed positioning groove. The positioning groove is rectangular. One side wall of the positioning groove is a first positioning stop, and the adjacent other side wall is a second positioning stop. A 90° positioning angle is formed between the first positioning stop and the second positioning stop. The first clamping device is located on the side opposite to the first positioning stop of the positioning plate. The first clamping device is provided with a first push plate. The first push plate moves in a straight line towards the first positioning stop. The first push plate is parallel to the first positioning stop, and the two clamp each other by moving closer or further apart. The second clamping device is located on the side opposite to the second positioning stop of the positioning plate. The second clamping device is provided with a second push plate. The second push plate moves in a straight line towards the second positioning stop. The second push plate is parallel to the second positioning stop, and the two clamp each other by moving closer or further apart.

2. The tooling fixture for CNC mold core machining according to claim 1, characterized in that: The first clamping device and the second clamping device both include a pusher structure with identical structure. The pusher structure includes a pusher plate unit, a base, and a pusher drive device. The base is formed on the upper surface of the positioning plate, and guide holes that pass through the front and back are respectively opened on both sides of the base; Guide rods are provided on both sides of the rear side of the push plate unit, and the guide rods on both sides are slidably inserted into the corresponding guide holes. The push-up drive device is connected to the push plate unit to enable the push plate unit to clamp with the first positioning stop or the second positioning stop.

3. The tooling fixture for CNC mold core machining according to claim 2, characterized in that: The push-drive device includes a drive screw and a drive threaded pair. The base is also provided with a through screw hole in the middle, which is parallel to the guide hole. One end of the drive screw is fixed to the rear side of the push plate unit and is movably inserted into the through screw hole. The outer wall of the drive screw is formed with an external thread structure. The top of the base is provided with an extension seat, which extends toward the rear of the base. The extension end is provided with a rotating connector. The drive threaded pair is rotatably installed on the rotating connector. The drive threaded pair is provided with an internal threaded hole and is threadedly connected to the drive screw. By manually twisting the drive threaded pair, the push plate unit can be driven to move forward or backward.

4. The tooling fixture for CNC mold core machining according to claim 3, characterized in that: The rotary connector is formed on the bottom surface of the extended end of the extension seat, and the rotary connector has a through-hole; the drive threaded pair includes a limiting ring, a tube body, and a sleeve arranged sequentially. A limiting ring is threadedly installed on the front side of the pipe body. The outer diameter of the limiting ring is larger than the outer diameter of the pipe body. The limiting ring engages with the front side of the rotary connector for limiting. The pipe body is rotatably inserted into the rotary connector hole. A sleeve is formed and connected to the rear side of the pipe body. The outer diameter of the sleeve is larger than the outer diameter of the pipe body. The sleeve engages with the rear side of the rotary connector for limiting. The internal threaded hole is formed in the inner cavity of the integral piece formed by the tube body and the sleeve.

5. The tooling fixture for CNC mold core machining according to claim 4, characterized in that: The outer wall of the sleeve is formed with a concave-convex surface structure to increase friction.

6. The tooling fixture for CNC mold core machining according to claim 1, characterized in that: The surface of the positioning plate is also provided with at least one drainage channel, which extends through to the side wall of the positioning plate and connects to the positioning groove.

7. The tooling fixture for CNC mold core machining according to claim 1, characterized in that: The base plate has multiple fastening notches around its perimeter, and each fastening notch is equipped with a trapezoidal screw. The base plate is locked and installed on the grinding machine by the trapezoidal screws.

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