Blanking mechanism for PCBN (Polycrystalline Cubic Boron Nitride) composite sheet forming device

Abstract

The utility model relates to the technical field of material processing, in particular to a blanking mechanism for a PCBN (Polycrystalline Cubic Boron Nitride) composite sheet forming device, which comprises a fixed frame, a mounting groove and a mounting cavity are arranged on two sides of the fixed frame, a pull rod is movably connected to the side wall, far away from the mounting groove, of the mounting cavity, and a reset spring is sleeved on the outer surface of the pull rod. A screen plate is arranged on the inner surface of the fixing frame, a screen mesh is arranged on the inner surface of the screen plate, mounting blocks are fixedly mounted on the two sides of the screen plate, and the mounting blocks make contact with the bottom surfaces of the mounting grooves; the screening device has the beneficial effects that a screen plate and a screen mesh can be conveniently taken out of the screening device and replaced, the screen plate and the screen mesh are more convenient to clean, during long-time use, screen holes can be blocked due to powder accumulation, the screening efficiency and the sintering quality of PCBN composite sheets are affected, blocking objects can be cleared away in time through a detachable structure, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of material processing, specifically to a feeding mechanism for a PCBN composite sheet forming device. Background Technology

[0002] PCBN (polycrystalline cubic boron nitride) is a composite material formed by polymerizing cubic boron nitride particles through a high-temperature and high-pressure process. It has extremely high hardness and good thermal conductivity. The feeding mechanism of the PCBN composite sheet forming device is usually used in the production line for manufacturing cutting materials with high hardness and high wear resistance.

[0003] Existing PCBN composite sheet molding equipment typically uses a vibrator installed at the bottom of the hopper to vibrate and make the powder in the hopper fall evenly. A rotary metering disc or screw conveyor precisely controls the amount of powder fed each time. The raw material powder is screened by a screening mechanism to remove impurities and particles that do not meet the particle size requirements. If the particle size in the raw material is different, it may cause defects in the composite sheet during the synthesis process and affect its hardness. Finally, the metered powder is introduced into the mold.

[0004] However, the screens of traditional screening mechanisms are prone to wear and breakage due to long-term operation, and the existing screens are usually fixed inside the screen plate and cannot be replaced. Furthermore, different PCBN composite material particles require different screen plate apertures for screening, which limits their applicability. Utility Model Content

[0005] The purpose of this utility model is to provide a feeding mechanism for a PCBN composite sheet forming device, so as to solve the problems mentioned in the background art that the screen of the traditional screening mechanism is prone to wear and breakage due to long-term operation, and the existing screen is usually fixed inside the screen plate and cannot be replaced, and PCBN composite material particles of different sizes require different screen plate apertures for screening.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a feeding mechanism for a PCBN composite sheet forming device, comprising:

[0007] The screening box has a detachable installation mechanism on its inner side. The detachable installation mechanism includes a fixed frame, with installation grooves and installation cavities on both sides of the fixed frame. A pull rod is movably connected to the side wall of the installation cavity away from the installation groove, and a return spring is sleeved on the outer surface of the pull rod.

[0008] A limiting block is fixedly installed on the side surface of the pull rod near the mounting groove, and a pulling block is fixedly installed on the side wall of the pull rod away from the limiting block. A sieve plate is provided on the inner surface of the fixed frame, and a sieve mesh is provided on the inner surface of the sieve plate. Mounting blocks are fixedly installed on both sides of the sieve plate, and the mounting blocks are in contact with the bottom surface of the mounting groove.

[0009] Preferably, a vibration mechanism is fixedly installed on the lower surface of the screening box. The vibration mechanism includes a vibration motor and spring seats are fixedly installed at the four corner edges of the screening box.

[0010] Preferably, a bearing seat is fixedly installed on the lower surface of the spring seat, and a buffer and shock absorption mechanism is fixedly installed on the lower surface of the bearing seat.

[0011] Preferably, the buffer and shock absorption mechanism includes: a base, a first buffer spring fixedly installed on the upper surface of the base, a first cavity column fixedly installed on the upper surface of the base, a second buffer spring provided on the inner surface of the first cavity column, a buffer support connected to the upper surface of the second buffer spring, an air pipe provided on the side surface of the first cavity column, and a piston structure provided at the end of the air pipe away from the first cavity column.

[0012] Preferably, the piston structure includes: a second chamber column, a piston plate disposed on the inner surface of the second chamber column, a piston rod fixedly installed on the side of the piston plate away from the air pipe, and a third buffer spring sleeved on the outer surface of the piston rod.

[0013] Preferably, a movable seat is fixedly installed at the end of the piston rod away from the second chamber column, and a support rod is movably connected to the inner surface of the movable seat.

[0014] Preferably, a connecting seat is fixedly installed on the lower surface of the bearing seat, the connecting seat is movably connected to the support rod, and a sliding groove is provided on the upper surface of the base, the sliding groove being in contact with the movable seat.

[0015] Preferably, a cover plate is movably connected to the upper surface of the screening box, and a hopper is fixedly installed on the side surface of the screening box.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model proposes a feeding mechanism for a PCBN composite sheet forming device;

[0018] 1. By setting a detachable installation mechanism, pulling the pull block outward causes the pull rod to drive the limit block to slide within the installation cavity via the return spring until the limit block is completely moved into the installation cavity, thereby releasing the limit block's restriction on the installation block, further releasing the connection between the sieve plate and the sieve screen, allowing the sieve screen to be removed from the sieve plate and then taken out of the screening device for replacement. This makes cleaning the sieve plate and sieve screen more convenient. During long-term use, the sieve holes will become clogged due to the accumulation of powder, affecting screening efficiency and the sintering quality of PCBN composite sheets. The detachable structure allows for timely cleaning of blockages, improving production efficiency.

[0019] 2. The detachable structure design allows for quick replacement of sieve plates and screens of different sizes or types, which can adapt to different production needs and improve versatility and flexibility. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the detachable installation mechanism of this utility model;

[0022] Figure 3 For the present utility model Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram of the installation structure of the sieve plate and sieve mesh of this utility model;

[0024] Figure 5 This is a schematic diagram of the buffer and shock absorption mechanism of this utility model;

[0025] Figure 6 This is a side sectional view of the buffer and shock absorption mechanism of this utility model.

[0026] In the diagram: 1. Base; 2. First buffer spring; 3. First cavity column; 4. Buffer support column; 5. Second buffer spring; 6. Bearing seat; 7. Air pipe; 8. Second cavity column; 9. Piston plate; 10. Piston rod; 11. Third buffer spring; 12. Moving seat; 13. Slide groove; 14. Support rod; 15. Connecting seat; 16. Screening box; 17. Vibrating motor; 18. Spring seat; 19. Fixed frame; 20. Mounting groove; 21. Mounting cavity; 22. Pull rod; 23. Return spring; 24. Limiting block; 25. Pulling block; 26. Screen plate; 27. Screen mesh; 28. Mounting block; 29. ​​Hopper; 30. Cover plate. 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 6 This utility model provides a technical solution: a feeding mechanism for a PCBN composite sheet forming device;

[0029] Example 1:

[0030] To quickly adjust the aperture of the screen plate 26 or clean the clogged screen 27 according to actual production needs, mounting grooves 20 and mounting cavities 21 are provided on both sides of the fixed frame 19. A pull rod 22 is movably connected to the side wall of the mounting cavity 21 away from the mounting groove 20. A return spring 23 is sleeved on the outer surface of the pull rod 22. A limit block 24 is fixedly installed on the side surface of the pull rod 22 near the mounting groove 20. A pulling block 25 is fixedly installed on the side wall of the pull rod 22 away from the limit block 24. The screen plate 26 is provided on the inner surface of the fixed frame 19. A screen 27 is provided on the surface of the screen plate 26. Mounting blocks 28 are fixedly installed on both sides of the screen plate 26. The mounting blocks 28 are in contact with the bottom surface of the mounting groove 20. By pulling the pulling block 25 outward, the pull rod 22 drives the limiting block 24 to slide in the mounting cavity 21 through the return spring 23 until the limiting block 24 is completely moved into the mounting cavity 21, thereby releasing the limiting block 24 from the mounting block 28, further releasing the connection between the screen plate 26 and the screen 27, and removing the screen 27 from the screen plate 26, and then taking it out of the screening device for replacement.

[0031] Example 2:

[0032] Based on Example 1, vibratory sieving is used to remove impurities and particles that do not meet the particle size requirements from the powder. A vibration mechanism is fixedly installed on the lower surface of the screening box 16. The vibration mechanism includes a vibration motor 17. Spring seats 18 are fixedly installed at the four corner edges of the screening box 16. A cover plate 30 is movably connected to the upper surface of the screening box 16. A hopper 29 is fixedly installed on the side surface of the screening box 16. The screening mechanism is vibrated and sieved by the drive of the vibration motor 17, so that the powder in the hopper 29 falls evenly. The amount of powder fed each time is precisely controlled by a rotary metering disc or a screw conveyor. Finally, the metered powder is introduced into the mold.

[0033] Example 3:

[0034] Based on Embodiment 2, in order to dampen and buffer the shaking generated by the vibration motor 17, a first buffer spring 2 is fixedly installed on the upper surface of the base 1, a first cavity column 3 is fixedly installed on the upper surface of the base 1, a second buffer spring 5 is provided on the inner surface of the first cavity column 3, a buffer support column 4 is connected to the upper surface of the second buffer spring 5, an air pipe 7 is provided on the side surface of the first cavity column 3, a piston structure is provided at the end of the air pipe 7 away from the first cavity column 3, a piston plate 9 is provided on the inner surface of the second cavity column 8, a piston rod 10 is fixedly installed on the side of the piston plate 9 away from the air pipe 7, a third buffer spring 11 is sleeved on the outer surface of the piston rod 10, a movable seat 12 is fixedly installed at the end of the piston rod 10 away from the second cavity column 8, a support rod 14 is movably connected to the inner surface of the movable seat 12, and a connecting seat 1 is fixedly installed on the lower surface of the bearing seat 6. 5. The connecting seat 15 is movably connected to the support rod 14. The upper surface of the base 1 is provided with a sliding groove 13, which contacts the movable seat 12. The first cavity column 3 can be used to support and buffer the four corners of the bearing seat 6. At the same time, it can be used in conjunction with the second cavity column 8 and the support rod 14 to buffer and reduce shock, thereby increasing the stability of the base 1. When the bearing seat 6 is subjected to vibration pressure and moves downward, the buffer column 4 is subjected to vibration pressure and moves downward through the second buffer spring 5. This causes the gas inside the first cavity column 3 to enter the second cavity column 8 through the air pipe 7. Under the action of air pressure, the piston plate 9 inside the second cavity column 8 pushes the piston rod 10 and the movable seat 12 to move. When the movable seat 12 moves, the support angle of the support rod 14 changes, thereby pushing the bearing seat 6 to move upward and reset. This process is repeated to buffer and reduce shock.

[0035] Working principle: Driven by the vibrating motor 17, the screening mechanism vibrates and screens the powder, causing the powder in the hopper 29 to fall evenly. A rotary metering disc or screw conveyor precisely controls the amount of powder fed each time. Finally, the metered powder is introduced into the mold. Pulling the pulling block 25 outward causes the pull rod 22 to drive the limiting block 24 to slide within the mounting cavity 21 via the return spring 23 until the limiting block 24 is completely inside the mounting cavity 21. This releases the limiting block 24 from the mounting block 28, further releasing the connection between the screen plate 26 and the screen mesh 27. The screen mesh 27 can then be removed from the screen plate 26 and taken out of the screening device for replacement. The first... The cavity column 3 provides support, buffering, and shock absorption for the four corners of the bearing seat 6. It can also be used in conjunction with the second cavity column 8 and the support rod 14 to buffer and absorb shock, increasing the stability of the base 1. When the bearing seat 6 is subjected to vibration pressure and moves downward, the buffer support column 4 is subjected to vibration pressure and moves downward through the second buffer spring 5. This causes the gas inside the first cavity column 3 to enter the second cavity column 8 through the air pipe 7. Under the action of air pressure, the piston plate 9 inside the second cavity column 8 pushes the piston rod 10 and the moving seat 12 to move. As the moving seat 12 moves, the support angle of the support rod 14 changes, which can push the bearing seat 6 to move upward and reset. This process is repeated to buffer and absorb shock.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A feeding mechanism for a PCBN composite sheet forming apparatus, characterized in that: include: The screening box (16) has a detachable installation mechanism on its inner side. The detachable installation mechanism includes a fixed frame (19). The fixed frame (19) has an installation groove (20) and an installation cavity (21) on both sides. A pull rod (22) is movably connected to the side wall of the installation cavity (21) away from the installation groove (20). A return spring (23) is sleeved on the outer surface of the pull rod (22). A limiting block (24) is fixedly installed on the side surface of the pull rod (22) near the mounting groove (20), and a pulling block (25) is fixedly installed on the side wall of the pull rod (22) away from the limiting block (24). A sieve plate (26) is provided on the inner surface of the fixed frame (19), and a sieve mesh (27) is provided on the inner surface of the sieve plate (26). Mounting blocks (28) are fixedly installed on both sides of the sieve plate (26), and the mounting blocks (28) are in contact with the bottom surface of the mounting groove (20).

2. The feeding mechanism for a PCBN composite sheet forming device according to claim 1, characterized in that: A vibration mechanism is fixedly installed on the lower surface of the screening box (16). The vibration mechanism includes a vibration motor (17) and spring seats (18) are fixedly installed at the four corner edges of the screening box (16).

3. The feeding mechanism for a PCBN composite sheet forming device according to claim 2, characterized in that: A bearing seat (6) is fixedly installed on the lower surface of the spring seat (18), and a buffer and shock absorption mechanism is fixedly installed on the lower surface of the bearing seat (6).

4. The feeding mechanism for a PCBN composite sheet forming device according to claim 3, characterized in that: The buffer and shock absorption mechanism includes: a base (1), a first buffer spring (2) fixedly installed on the upper surface of the base (1), a first cavity column (3) fixedly installed on the upper surface of the base (1), a second buffer spring (5) provided on the inner surface of the first cavity column (3), a buffer support column (4) connected to the upper surface of the second buffer spring (5), an air pipe (7) provided on the side surface of the first cavity column (3), and a piston structure provided at the end of the air pipe (7) away from the first cavity column (3).

5. The feeding mechanism for a PCBN composite sheet forming apparatus according to claim 4, characterized in that: The piston structure includes: a second chamber column (8), a piston plate (9) is provided on the inner surface of the second chamber column (8), a piston rod (10) is fixedly installed on the side of the piston plate (9) away from the air pipe (7), and a third buffer spring (11) is sleeved on the outer surface of the piston rod (10).

6. The feeding mechanism for a PCBN composite sheet forming apparatus according to claim 5, characterized in that: The piston rod (10) is fixedly mounted with a movable seat (12) at one end away from the second chamber column (8), and a support rod (14) is movably connected to the inner surface of the movable seat (12).

7. The feeding mechanism for a PCBN composite sheet forming apparatus according to claim 3, characterized in that: A connecting seat (15) is fixedly installed on the lower surface of the bearing seat (6). The connecting seat (15) is movably connected to the support rod (14). A sliding groove (13) is opened on the upper surface of the base (1). The sliding groove (13) is in contact with the movable seat (12).

8. The feeding mechanism for a PCBN composite sheet forming apparatus according to claim 1, characterized in that: The upper surface of the screening box (16) is movably connected to a cover plate (30), and the side surface of the screening box (16) is fixedly installed with a hopper (29).

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