A compacting die for neodymium-iron-boron magnets

Abstract

The present application relates to the field of neodymium iron boron magnet pressing die, concretely is a kind of neodymium iron boron magnet's pressing die, including mould support seat, the top of the mould support seat is fixedly connected with female die, the top of the female die is movably connected with male die cylinder, the top of the male die cylinder is fixedly connected with storage tube, further including: hydraulic telescopic cylinder, the hydraulic telescopic cylinder is movably connected in the inner top surface of storage tube.This kind of neodymium iron boron magnet's pressing die is composed of sealing switching mechanism and excess material removing mechanism;Through the cooperation of male die cylinder, hydraulic telescopic cylinder and sealing switching mechanism and other components, make hydraulic telescopic with pressure rod and male die cylinder down and cooperate with female die in the process of pressing production, under the cooperation of sealing switching mechanism, make male die cylinder rise in the process of internal automatic replenishment of magnetic powder, and magnetic powder can be guided into female die during the process of male die cylinder descending and pressing production, can effectively reduce process switching and waiting period of mechanical action, improve efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of neodymium-iron-boron magnet pressing die, in particular to a neodymium-iron-boron magnet pressing die. BACKGROUND

[0002] The neodymium-iron-boron permanent magnet material is a permanent magnet material based on intermetallic compound. In the production process, the magnetic powder is first pressed into a certain shape, size, density and strength by a pressing die, and then is fired into a shape.

[0003] The prior art has the following problems which have not been well solved: 1. In the use process of the existing part of the neodymium-iron-boron magnet pressing die, the magnetic powder needs to be first added into the cavity of the concave die, and then the magnetic powder in the cavity of the concave die is pressed into a shape by the convex die. The operation process is composed of two separate operation procedures of feeding and pressing, which affects the work efficiency. SUMMARY

[0004] The present application provides a neodymium-iron-boron magnet pressing die to solve the problems in the background art: 1. In the use process of the existing neodymium-iron-boron magnet pressing die, the feeding and pressing of the magnetic powder are completed by two separate operation procedures, which affects the work efficiency. To achieve the above-mentioned purpose, the present application provides the following technical scheme: a neodymium-iron-boron magnet pressing die, comprising:

[0005] A die support seat is provided, and a concave die is fixedly connected to the top of the die support seat. A convex die cylinder is movably connected to the top of the concave die. A storage cylinder is fixedly connected to the top of the convex die cylinder.

[0006] Further comprising: a hydraulic telescopic cylinder movably installed at the shaft center position of the storage cylinder. A sealing switching mechanism is movably connected between the movable end of the hydraulic telescopic cylinder and the inner wall of the storage cylinder. The state of the sealing switching mechanism is converted during the pressing operation of the convex die cylinder driven by the hydraulic telescopic cylinder.

[0007] A residual material removing mechanism is movably connected between the inner wall of the convex die cylinder and the lower part of the sealing switching mechanism.

[0008] Preferably, the sealing switching mechanism comprises a pressing rod fixedly connected to the movable end of the hydraulic telescopic cylinder. A sealing cone sleeve is movably sleeved on the surface of the hydraulic telescopic cylinder. The sealing cone sleeve is movably inserted between the convex die cylinder and the storage cylinder.

[0009] L-shaped guide grooves are symmetrically formed in the outer wall of the sealing cone sleeve. Guide rods are symmetrically fixedly connected to the inner wall of the storage cylinder. Two guide rods are respectively slidably connected in the two L-shaped guide grooves. Main wedge-shaped clamping blocks are symmetrically fixedly connected to the outer wall of the sealing cone sleeve. From wedge-shaped clamping blocks matched with the main wedge-shaped clamping blocks are fixedly connected to the upper part of the inner wall of the convex die cylinder.

[0010] A reset block is symmetrically fixedly connected to the upper part of the inner wall of the sealing cone sleeve, and a reset rod that cooperates with the reset block is fixedly connected to the surface of the pressure rod.

[0011] The inner wall of the sealing cone sleeve is symmetrically hinged with pad rods, the upper part of the pressure rod is fixedly connected with an arc-shaped pad plate that matches the pad rod, the surface of the pressure rod is fixedly connected with a washer ring, the top of the washer ring is fixedly connected with a compression spring, and the top of the compression spring overlaps the bottom of the sealing cone sleeve.

[0012] A sealing cone block is fixedly connected to the bottom of the pressure rod, and the inner wall of the punch cylinder is set as a conical cavity that cooperates with the sealing cone block.

[0013] Preferably, the upper part of the L-shaped guide groove is inclined, and the horizontal distance between the two ends of the L-shaped guide groove is set to one-quarter of the outer diameter of the sealing cone sleeve.

[0014] Preferably, the inner wall of the sealing cone sleeve is symmetrically provided with grooves, and a hinge rod is fixedly connected between the two sides of the inner wall of the groove. The two pad rods correspond one-to-one with the two grooves, and the pad rods are rotatably connected to the surface of the corresponding hinge rods.

[0015] Preferably, the residual material removal mechanism includes support blocks, and two support blocks are provided. The two support blocks are symmetrically fixedly connected to the upper part of the inner wall of the punch cylinder. An impact rod is vertically slidably connected to the middle of the support block, and a return spring that cooperates with the support block is movably sleeved on the upper part of the impact rod.

[0016] An airbag is fixedly connected to the bottom of the impact rod, a piston cylinder is fixedly connected to the side wall of the airbag, a U-shaped adjusting block is fixedly connected to one end of the piston cylinder, and limit blocks are symmetrically fixedly connected to the inner wall of the U-shaped adjusting block.

[0017] An adjusting ring is fixedly sleeved on the surface of the pressure rod. Grooves are symmetrically opened on both sides of the adjusting ring. A T-shaped limiting rod that cooperates with the limiting block is hinged inside the groove.

[0018] Preferably, the bottom of the impact rod is fixedly connected to an arc-shaped mounting plate, the airbag is fixedly connected inside the arc-shaped mounting plate, and the upper part of the conical chamber is provided as a conical surface that cooperates with the airbag;

[0019] The piston cylinder is fixedly connected to the side wall of the arc-shaped mounting plate, and the air inlet end of the piston cylinder is fixedly connected to the airbag exhaust port.

[0020] Preferably, the inner bottom surface of the groove is set as an inclined surface, and the length of the end of the T-shaped limiting rod away from the pressure rod is set to 0.8 times the distance between the inner walls of the U-shaped adjusting blocks.

[0021] Preferably, the lower part of the punch cylinder is movably sleeved with a material guiding ring, the top of the material guiding ring is fixedly connected with the surface of the punch cylinder through a connecting spring, and the bottom of the material guiding ring is overlapped on the top of the die;

[0022] The top of the die is fixedly connected with a sliding rod in a symmetrical mode, the middle part of the outer wall of the punch cylinder is fixedly connected with a sliding block in a symmetrical mode, the two sliding rods are slidably connected with the middle part of the two sliding blocks respectively, and the lower part of the sliding rod is movably sleeved with a reset spring.

[0023] The bottom of the die support base is fixedly connected with an electric push rod, the movable end of the electric push rod is fixedly connected with a baffle matched with the bottom of the die, the two sides of the top of the die support base are fixedly connected with a support, and the top of the hydraulic telescopic cylinder is fixedly connected with the upper part of the support.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] In the present application, through the cooperation of the punch cylinder, the hydraulic telescopic cylinder and the sealing switching mechanism and other components, the internal magnetic powder can be automatically supplemented during the upward movement of the punch cylinder under the cooperation of the sealing switching mechanism during the pressing production process with the cooperation of the hydraulic telescopic cylinder and the punch cylinder, and the magnetic powder can be guided into the die for pressing production during the downward movement of the punch cylinder, so that the process switching and the waiting period of mechanical action can be effectively reduced, and the production and processing efficiency can be improved.

[0026] In the present application, through the cooperation of the punch cylinder, the pressure rod and the excess material removing mechanism and other components, the magnetic powder remaining on the inner wall of the punch cylinder can be shaken off through the vibration of the punch cylinder caused by the impact of the excess material removing mechanism driven by the pressure rod on the inner wall of the punch cylinder during the magnetic powder supplementing process of the pressure rod with the punch cylinder, so that the magnetic powder remaining on the inner wall of the punch cylinder can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a sectional view of the position of the die and the punch cylinder of the present application;

[0028] Figure 2 It is a sectional view of the position of the die and the punch cylinder of the present application;

[0029] Figure 3 It is a sectional view of the position of the die and the punch cylinder of the present application;

[0030] Figure 4 It is an enlarged view of the structure at A in the present application Figure 3

[0031] Figure 5 It is a sectional view of the position of the die and the punch cylinder of the present application;

[0032] Figure 6 ​Partial view of local position of sealing cone sleeve and arc-shaped pad plate of the application;

[0033] Figure 7 Partial view of local position of punch cylinder and adjusting ring of the application;

[0034] Figure 8 Partial view of local position of punch cylinder and adjusting ring of the application; Figure 7 Enlarged view of structure at B in the application;

[0035] Figure 9 Partial view of local position of punch cylinder and adjusting ring of the application; Figure 7 Enlarged view of structure at C in the application;

[0036] Figure 10 Partial view of local position of punch cylinder and adjusting ring of the application;

[0037] Figure 11 Partial view of local position of punch cylinder and adjusting ring of the application;

[0038] Figure 12 Partial view of local position of punch cylinder and adjusting ring of the application;

[0039] Figure 13 Partial view of local position of punch cylinder and adjusting ring of the application;

[0040] Figure 14 Partial view of local position of punch cylinder and adjusting ring of the application;

[0041] Figure 15 Partial view of local position of punch cylinder and adjusting ring of the application;

[0042] In the figure: 1, mold support seat; 2, concave die; 3, punch cylinder; 4, storage cylinder; 5, hydraulic telescopic cylinder; 6, sealing switching mechanism; 601, pressing rod; 602, sealing cone sleeve; 603, L-shaped guide groove; 604, guide rod; 605, main wedge-shaped clamping block; 606, secondary wedge-shaped clamping block; 607, reset block; 608, reset rod; 609, pad rod; 610, arc-shaped pad plate; 611, pad ring; 612, compression spring; 613, sealing cone block; 614, conical chamber; 7, excess material removing mechanism; 701, support block; 702, impact rod; 703, return spring; 704, air bag; 705, piston cylinder; 706, U-shaped adjusting block; 707, limiting block; 708, adjusting ring; 709, groove; 710, T-shaped limiting rod. DETAILED DESCRIPTION

[0043] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present application.

[0044] Please refer to Figures 1 to 15 The present application provides a technical solution: a pressing mold for a neodymium iron boron magnet, comprising:

[0045] A mold support seat 1 is provided, and a female die 2 is fixedly connected to the top of the mold support seat 1. A male die cylinder 3 is movably connected to the top of the female die 2. A material storage cylinder 4 is fixedly connected to the top of the male die cylinder 3.

[0046] Further comprising: a hydraulic telescopic cylinder 5 movably installed at the axial position of the material storage cylinder 4. A sealing switching mechanism 6 is movably connected between the movable end of the hydraulic telescopic cylinder 5 and the inner wall of the material storage cylinder 4. The state of the sealing switching mechanism 6 is switched during the pressing operation of the male die cylinder 3 driven by the hydraulic telescopic cylinder 5.

[0047] A residual material removing mechanism 7 is movably connected between the inner wall of the male die cylinder 3 and the lower part of the sealing switching mechanism 6. It should be noted that the residual material removing mechanism 7 is used to clean the residual magnetic powder in the male die cylinder 3.

[0048] In the present embodiment, as shown in Figures 1 to 15 The sealing switching mechanism 6 comprises a pressing rod 601 fixedly connected to the movable end of the hydraulic telescopic cylinder 5. A sealing cone sleeve 602 is movably sleeved on the surface of the hydraulic telescopic cylinder 5 and movably inserted between the male die cylinder 3 and the material storage cylinder 4. It should be noted that the lower part of the hydraulic telescopic cylinder 5 is provided with a conical surface matched with the sealing cone sleeve 602. When the sealing cone sleeve 602 moves downward to the limit position inside the material storage cylinder 4, the inner bottom surface of the material storage cylinder 4 is sealed by the cooperation of the conical surface of the lower part of the hydraulic telescopic cylinder 5, the inner bottom surface of the material storage cylinder 4 and the sealing cone sleeve 602. The upper part of the sealing cone sleeve 602 is made of rubber material, which can improve the sealing effect and also produce a certain deformation effect. The movable end of the hydraulic telescopic cylinder 5 cannot rotate, which avoids the rotation of the pressing rod 601 affecting the use effect.

[0049] The outer wall of the sealing cone sleeve 602 is symmetrically provided with L-shaped guide grooves 603, the inner wall of the storage cylinder 4 is symmetrically fixedly connected with guide rods 604, the two guide rods 604 are respectively slidably connected in the interiors of the two L-shaped guide grooves 603, the outer wall of the sealing cone sleeve 602 is symmetrically fixedly connected with main wedge-shaped clamping blocks 605, and the upper portion of the inner wall of the convex die cylinder 3 is fixedly connected with slave wedge-shaped clamping blocks 606 matched with the main wedge-shaped clamping blocks 605. It should be noted that, during the downward movement of the sealing cone sleeve 602 in the storage cylinder 4, the guide rods 604 on the inner wall of the storage cylinder 4 slide in cooperation with the L-shaped guide grooves 603 on the outer wall of the sealing cone sleeve 602, so that the sealing cone sleeve 602 can rotate by 90 degrees during the downward movement, and during the downward rotation of the sealing cone sleeve 602, the main wedge-shaped clamping blocks 605 move downward and rotate to the bottom positions of the slave wedge-shaped clamping blocks 606 on the inner wall of the convex die cylinder 3, the main wedge-shaped clamping blocks 605 are limited in the current positions by the slave wedge-shaped clamping blocks 606, and the opposite ends of the main wedge-shaped clamping blocks 605 and the slave wedge-shaped clamping blocks 606 are all provided with inclined surfaces, so as to facilitate the clamping cooperation of the main wedge-shaped clamping blocks 605 and the slave wedge-shaped clamping blocks 606.

[0050] The upper portion of the inner wall of the sealing cone sleeve 602 is symmetrically fixedly connected with reset blocks 607, and the surface of the pressing rod 601 is fixedly connected with reset rods 608 matched with the reset blocks 607. It should be noted that the bottom of the reset block 607 is provided with an inclined surface, and during the upward reset movement of the pressing rod 601 with the reset rod 608, the reset rod 608 will be in contact with the inclined surface at the bottom of the reset block 607, so that the reset block 607 rotates with the sealing cone sleeve 602.

[0051] The inner wall of the sealing cone sleeve 602 is symmetrically hingedly connected with pad rods 609, the upper portion of the pressing rod 601 is fixedly connected with arc-shaped pad plates 610 matched with the pad rods 609, the surface of the pressing rod 601 is fixedly connected with pad rings 611, the top of the pad ring 611 is fixedly connected with compression springs 612, and the top of the compression spring 612 is lapped on the bottom of the sealing cone sleeve 602. It should be noted that, during the downward movement of the pressing rod 601, the arc-shaped pad plates 610 will be pressed against the surfaces of the pad rods 609 on the inner wall of the sealing cone sleeve 602, so that the pressing rod 601 moves downward with the sealing cone sleeve 602, after the sealing cone sleeve 602 moves downward and rotates by 90 degrees, the pad rods 609 are out of contact with the arc-shaped pad plates 610, so that the pressing rod 601 can continue to move downward, and the sealing cone sleeve 602 rotated by 90 degrees rotates the reset blocks 607 to above the reset rods 608 on the surface of the pressing rod 601, when the pressing rod 601 moves upward to the limit, the pressing rod 601 will be in contact with the bottom of the reset block 607 with the reset rod 608, so that the reset block 607 rotates with the sealing cone sleeve 602, at this time, the sealing cone sleeve 602 releases the limiting state of the slave wedge-shaped clamping blocks 606 with the main wedge-shaped clamping blocks 605, and is elastically restored upward with the sealing cone sleeve 602 by the compression spring 612, so that the magnetic powder in the storage cylinder 4 falls into the convex die cylinder 3, and the automatic feeding is completed.

[0052] The bottom of the pressing rod 601 is fixedly connected with a sealing cone block 613, and the inner wall of the convex die cylinder 3 is provided with a tapered cavity 614 matched with the sealing cone block 613. It should be noted that when the pressing rod 601 rises to the limit state, the sealing cone block 613 is matched with the inner wall of the middle part of the tapered cavity 614 to seal the middle part of the convex die cylinder 3, and when the pressing rod 601 moves downward to the limit state, the bottom of the sealing cone block 613 is flush with the inner bottom surface of the tapered cavity 614, so that the sealing cone block 613 with the convex die cylinder 3 moves downward synchronously to cooperate with the concave die 2 to perform pressing production.

[0053] In the embodiment, as shown in the figure, Figures 1 to 15 the upper part of the L-shaped guide groove 603 is arranged obliquely, and the horizontal distance between the two ends of the L-shaped guide groove 603 is one fourth of the outer diameter of the sealing cone sleeve 602. It should be noted that the inner bottom surface of the L-shaped guide groove 603 is provided with a discharge groove to avoid residual magnetic powder in the L-shaped guide groove. The vertical distance between the top of the main wedge-shaped clamping block 605 and the bottom of the slave wedge-shaped clamping block 606 is the same as the distance between the upper and lower ends of the L-shaped guide groove 603, so as to ensure that the main wedge-shaped clamping block 605 can move downward with the sealing cone sleeve 602 to the lower part of the slave wedge-shaped clamping block 606 when the guide rod 604 moves from one end of the L-shaped guide groove 603 to the other end, and at the same time, the horizontal distance of the L-shaped guide groove 603 enables the sealing cone sleeve 602 to rotate stably by 90 degrees during downward movement.

[0054] In the embodiment, as shown in the figure, Figures 1 to 15 the inner wall of the sealing cone sleeve 602 is symmetrically provided with a recess, and the two sides of the inner wall of the recess are fixedly connected with a hinge rod. The two spacer rods 609 correspond to the two recesses one by one, and the spacer rod 609 is rotatably connected to the surface of the corresponding hinge rod. It should be noted that under the action of the recess, the spacer rod 609 can be flipped upward in the recess but cannot be flipped downward. The top of the arc-shaped pad 610 is provided with an inclined surface. When the pressing rod 601 moves downward with the arc-shaped pad 610, the spacer rod 609 moves downward with the sealing cone sleeve 602. When the pressing rod 601 moves upward with the arc-shaped pad 610 to reset, the spacer rod 609 can be flipped upward in the recess, so that the pressing rod 601 cannot move upward with the spacer rod 609 and the sealing cone sleeve 602 through the arc-shaped pad 610. The length of the arc-shaped pad 610 is one fourth of the inner diameter of the sealing cone sleeve 602, and when the sealing cone sleeve 602 rotates by 90 degrees, the arc-shaped pad 610 is out of contact with the spacer rod 609. The inner wall of the recess is provided with a rubber pad for resetting the spacer rod 609 after deflection. After the spacer rod 609 is out of pressure, the rubber pad resets and flips the spacer rod 609. The rubber pad is a prior art, which will not be described in detail here.

[0055] In the embodiment, as shown in the figure, Figures 1 to 15As shown, the residual material removal mechanism 7 includes two support blocks 701, which are symmetrically fixedly connected to the upper part of the inner wall of the punch cylinder 3. An impact rod 702 is vertically slidably connected to the middle of each support block 701. A return spring 703, which cooperates with the support block 701, is movably sleeved on the upper part of the impact rod 702. It should be noted that the impact rod 702 has a directional groove on its surface, and a directional block that cooperates with the directional groove is fixedly connected to the inner ring of the support block 701. This ensures that the impact rod 702 can only slide vertically within the support block 701 and cannot rotate, preventing the impact rod 702 from rotating with the U-shaped adjusting block 706 and affecting its performance. Alternatively, the impact rod 702 can be made into a rectangular rod. These anti-rotation methods are existing technologies and will not be described in detail.

[0056] An airbag 704 is fixedly connected to the bottom of the impact rod 702. A piston cylinder 705 is fixedly connected to the side wall of the airbag 704. A U-shaped adjusting block 706 is fixedly connected to one end of the piston cylinder 705. Limiting blocks 707 are symmetrically fixedly connected to the inner wall of the U-shaped adjusting block 706.

[0057] An adjusting ring 708 is fixedly sleeved on the surface of the pressure rod 601. Grooves 709 are symmetrically opened on both sides of the adjusting ring 708. A T-shaped limiting rod 710 that cooperates with the limiting block 707 is hinged inside the groove 709. It should be noted that when the pressure rod 601 moves down with the adjusting ring 708, the T-shaped limiting rod 710 on the adjusting ring 708 will overlap between the limiting blocks 707 on both sides of the inner wall of the U-shaped adjusting block 706. The T-shaped limiting rod 710 moves down synchronously with the U-shaped adjusting block 706, the airbag 704 and the impact rod 702. When the airbag 704 presses against the conical surface of the inner wall of the conical chamber 614, the airbag 704 is pressurized and injects gas into the piston cylinder 705, causing the piston cylinder 705 to extend with the U-shaped adjusting block 706. At this time, the T-shaped limiting rod 710 slides relative to the two limiting blocks 707. After the T-shaped limiting rod 710 releases contact with the limiting blocks 707, the return spring 703 moves up with the impact rod 702 and impacts the inner wall of the punch cylinder 3. The resulting vibration can shake off the magnetic powder remaining on the inner wall of the punch cylinder 3, reducing the amount of magnetic powder remaining.

[0058] In this embodiment, as Figures 1 to 15 As shown, an arc-shaped mounting plate is fixedly connected to the bottom of the impact rod 702, and the airbag 704 is fixedly connected inside the arc-shaped mounting plate. The upper part of the conical chamber 614 is set as a conical surface that cooperates with the airbag 704.

[0059] The piston cylinder 705 is fixedly connected to the side wall of the arc-shaped mounting plate, and the gas inlet end of the piston cylinder 705 is fixedly connected to the gas outlet of the air bag 704. It should be noted that when the bottom of the air bag 704 is no longer in a pressure state, the piston cylinder 705 can automatically reset, so that the gas inside the piston cylinder 705 flows back into the air bag 704. Here, the piston cylinder 705 is a prior art and will not be described in detail.

[0060] In this embodiment, as shown in Figures 1 to 15 The inner bottom surface of the groove 709 is provided as an inclined surface, and the length of the T-shaped limiting rod 710 away from one end of the pressing rod 601 is 0.8 times the distance between the inner walls of the U-shaped adjusting block 706. It should be noted that the bottom inclined surface of the groove 709 is provided, and when the pressing rod 601 rises with the T-shaped limiting rod 710, the T-shaped limiting rod 710 can be flipped downward to an inclined state in the groove 709 to disengage from the position of the limiting block 707, thereby avoiding interference and avoiding residual magnetic powder in the groove 709. During the movement of the T-shaped limiting rod 710 on the surface of the limiting block 707, the T-shaped limiting rod 710 can push the magnetic powder on the surface of the limiting block 707 to fall, reducing the residual situation. A torsional spring is provided between the surface of the T-shaped limiting rod 710 and the inner wall of the groove 709, which facilitates the resetting of the flipped T-shaped limiting rod 710. Alternatively, a rubber pad for resetting the T-shaped limiting rod 710 can be provided in the groove 709. The above-mentioned torsional spring and rubber pad are prior arts and will not be described in detail.

[0061] In this embodiment, as shown in Figures 1 to 15 The lower part of the male die cylinder 3 movably sleeves a material guiding ring, a connecting spring is fixedly connected between the top of the material guiding ring and the surface of the male die cylinder 3, and the bottom of the material guiding ring overlaps the top of the female die 2. It should be noted that the material guiding ring is provided so that the magnetic powder discharged from the male die cylinder 3 can accurately fall into the cavity of the female die 2.

[0062] The top of the female die 2 is fixedly connected with a slide rod, the middle of the outer wall of the male die cylinder 3 is fixedly connected with a slide block, the two slide rods are respectively slidably connected to the middle of the two slide blocks, and the lower part of the slide rod movably sleeves a reset spring. It should be noted that the cooperation of the slide rod and the slide block guides the downward movement of the male die cylinder 3, ensuring that the male die cylinder 3 can be stably inserted into the female die 2 for pressing production.

[0063] The bottom of the mold support seat 1 is fixedly connected with an electric push rod, the movable end of the electric push rod is fixedly connected with a baffle matched with the bottom of the female die 2, the two sides of the top of the mold support seat 1 are fixedly connected with a support, and the top of the hydraulic telescopic cylinder 5 is fixedly connected with the upper part of the support. It should be noted that moving the baffle by the electric push rod can unload the Nd-Fe-B magnet pressed in the female die 2. This operation is a prior art and will not be described in detail here.

[0064] The method of use and advantages of this invention: The working process of this pressing mold for neodymium iron boron magnets is as follows:

[0065] like Figures 1 to 15 As shown, during use, the hydraulic telescopic cylinder 5 is activated, causing the pressure rod 601 to move downwards for pressing. At this time, the arc-shaped pad 610 on the upper part of the pressure rod 601 moves downwards and presses against the pad rod 609 on the inner wall of the sealing cone sleeve 602, causing the pad rod 609 to move downwards with the sealing cone sleeve 602 between the two guide rods 604. At this time, the guide rods 604 slide in cooperation with the L-shaped guide groove 603 on the surface of the sealing cone sleeve 602, causing the sealing cone sleeve 602 to move downwards and rotate ninety degrees. As the sealing cone sleeve 602 is about to move down to its limit position, the main wedge-shaped locking block 605 on the outer wall of the sealing cone sleeve 602 moves to the lower position of the secondary wedge-shaped locking block 606 on the inner wall of the punch cylinder 3. As the sealing cone sleeve 602 rotates, the main wedge-shaped locking block 605 engages with the bottom of the secondary wedge-shaped locking block 606. After rotating ninety degrees, the sealing cone sleeve 602, along with the pad rod 609, releases contact with the arc-shaped pad plate 610, allowing the pressure rod 601 to continue moving down.

[0066] At the same time, the downward-moving pressure rod 601, along with the sealing cone 613, releases contact with the middle position of the inner wall of the punch cylinder 3, causing the magnetic powder in the upper part of the conical cavity 614 of the punch cylinder 3 to fall from the outer position of the sealing cone 613 to the bottom of the punch cylinder 3. Under the guidance of the guide ring, the magnetic powder falls into the interior of the die 2. At this time, the adjusting ring 708 on the pressure rod 601, along with the T-shaped limiting rod 710, presses against the top of the limiting block 707 on the inner wall of the U-shaped adjusting block 706, causing the U-shaped adjusting block 706 to move synchronously through the piston cylinder 705, carrying the airbag 704 and the impact rod 702. As the airbag 704 moves downward, when it presses against the conical surface in the middle of the conical chamber 614, the airbag 704 is compressed, causing the piston cylinder 705 to extend and move along with the U-shaped adjusting block 706. At this time, the limiting block 707 on the U-shaped adjusting block 706 gradually releases its contact with the T-shaped limiting rod 710. Then, the return spring 703 moves the impact rod 702 back to its original position and impacts the upper part of the inner wall of the conical chamber 614, causing the inner wall of the punch cylinder 3 to vibrate and shake off the magnetic powder attached to the inner wall of the punch cylinder 3, effectively reducing the amount of magnetic powder remaining inside the conical chamber 614.

[0067] When the pressure rod 601 continues to move down, the bottom of the pressure rod 601 is clamped into the bottom surface of the conical chamber 614, and the male die cylinder 3 is synchronously moved down, so that the male die cylinder 3 enters the inside of the female die 2 to carry out the neodymium iron boron magnet pressing production. When the hydraulic telescopic cylinder 5 with the pressure rod 601 rises to reset, the compression spring 612 on the surface of the pressure rod 601 is pressed against the bottom of the sealing cone sleeve 602. At this time, under the cooperation of the main wedge-shaped clamping block 605 and the secondary wedge-shaped clamping block 606, the sealing cone sleeve 602 cannot rise with the compression spring 612. When the pressure rod 601 is about to rise to the limit position, the reset rod 608 is brought into cooperation with the reset block 607 on the inner wall of the sealing cone sleeve 602 to slide, so that the sealing cone sleeve 602 is reversely rotated. At this time, the main wedge-shaped clamping block 605 and the secondary wedge-shaped clamping block 606 are released from the limiting state, so that the compression spring 612 is pressed against the sealing cone sleeve 602 to rise and reset, so that the magnetic powder in the inside of the storage cylinder 4 is quantitatively dropped into the upper position of the conical chamber 614, and the automatic material supplementing work is completed.

[0068] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application, and are not used to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A pressing die of a neodymium-iron-boron magnet, comprising: a die support base (1), a female die (2) is fixedly connected to the top of the die support base (1), a male die cylinder (3) is movably connected to the top of the female die (2), and a storage cylinder (4) is fixedly connected to the top of the male die cylinder (3); characterized in that it further comprises: a hydraulic telescopic cylinder (5) movably installed at the axial position of the storage cylinder (4), a sealing switching mechanism (6) movably connected between the movable end of the hydraulic telescopic cylinder (5) and the inner wall of the storage cylinder (4), and the state of the sealing switching mechanism (6) is switched during the pressing operation of the male die cylinder (3) driven by the hydraulic telescopic cylinder (5); a surplus material removing mechanism (7) movably connected between the inner wall of the male die cylinder (3) and the lower part of the sealing switching mechanism (6); the sealing switching mechanism (6) comprises a pressing rod (601) fixedly connected to the movable end of the hydraulic telescopic cylinder (5), a sealing cone sleeve (602) movably sleeved on the surface of the hydraulic telescopic cylinder (5), and the sealing cone sleeve (602) movably inserted between the male die cylinder (3) and the storage cylinder (4); L-shaped guide grooves (603) are symmetrically formed in the outer wall of the sealing cone sleeve (602), guide rods (604) are symmetrically fixedly connected to the inner wall of the storage cylinder (4), two guide rods (604) are respectively slidably connected inside two L-shaped guide grooves (603), main wedge-shaped clamping blocks (605) are symmetrically fixedly connected to the outer wall of the sealing cone sleeve (602), and upper parts of the inner wall of the male die cylinder (3) are fixedly connected with slave wedge-shaped clamping blocks (606) matched with the main wedge-shaped clamping blocks (605); upper parts of the inner wall of the sealing cone sleeve (602) are symmetrically fixedly connected with reset blocks (607), and the surface of the pressing rod (601) is fixedly connected with reset rods (608) matched with the reset blocks (607); the inner wall of the sealing cone sleeve (602) is symmetrically hinged with spacer rods (609), the upper part of the pressing rod (601) is fixedly connected with an arc-shaped spacer plate (610) matched with the spacer rods (609), the surface of the pressing rod (601) is fixedly connected with a spacer ring (611), the top of the spacer ring (611) is fixedly connected with a compression spring (612), and the top of the compression spring (612) is lapped on the bottom of the sealing cone sleeve (602); the bottom of the pressing rod (601) is fixedly connected with a sealing cone block (613), and the inner wall of the male die cylinder (3) is provided with a conical cavity (614) matched with the sealing cone block (613).

2. A compacting die for neodymium-iron-boron magnets according to claim 1, characterized in that: The upper part of the L-shaped guide groove (603) is obliquely arranged, and the horizontal distance between the two ends of the L-shaped guide groove (603) is one fourth of the outer diameter of the sealing cone sleeve (602).

3. A compacting die for neodymium-iron-boron magnets according to claim 2, characterized in that: Symmetrical grooves are formed in the inner wall of the sealing cone sleeve (602), hinge rods are fixedly connected between the inner walls of the grooves, two spacer rods (609) correspond to two grooves, and the spacer rods (609) are rotatably connected to the surfaces of the corresponding hinge rods.

4. A compacting die for neodymium-iron-boron magnets according to claim 3, characterized in that: The excess material removing mechanism (7) comprises support blocks (701), two of which are symmetrically fixedly connected to the upper portion of the inner wall of the punch cylinder (3), the middle portion of the support block (701) is vertically slidably connected with an impact rod (702), the upper portion of the impact rod (702) movably sleeved with a return spring (703) matched with the support block (701); The bottom of the impact rod (702) is fixedly connected with an air bag (704), the sidewall of the air bag (704) is fixedly connected with a piston cylinder (705), one end of the piston cylinder (705) is fixedly connected with a U-shaped adjusting block (706), the inner wall of the U-shaped adjusting block (706) is symmetrically fixedly connected with a limiting block (707); The surface of the pressing rod (601) is fixedly sleeved with an adjusting ring (708), the two sides of the adjusting ring (708) are symmetrically provided with grooves (709), the inside of the groove (709) is hingedly connected with a T-shaped limiting rod (710) matched with the limiting block (707).

5. A compacting die for neodymium-iron-boron magnets according to claim 4, characterized in that: The bottom of the impact rod (702) is fixedly connected with an arc-shaped mounting plate, the air bag (704) is fixedly connected in the inside of the arc-shaped mounting plate, the upper portion of the conical chamber (614) is provided with a conical surface matched with the air bag (704); The piston cylinder (705) is fixedly connected to the sidewall of the arc-shaped mounting plate, and the air inlet end of the piston cylinder (705) is fixedly connected with the air exhaust port of the air bag (704).

6. A compacting die for neodymium-iron-boron magnets according to claim 5, characterized in that: The inner bottom surface of the groove (709) is provided as an inclined surface, and the length of the T-shaped limiting rod (710) away from the pressing rod (601) is 0.8 times the distance between the inner walls of the U-shaped adjusting block (706).

7. A compacting die for neodymium-iron-boron magnets according to claim 6, characterized in that: The lower portion of the punch cylinder (3) movably sleeved with a material guiding ring, the top of the material guiding ring and the surface of the punch cylinder (3) are fixedly connected with a connecting spring, and the bottom of the material guiding ring is overlapped on the top of the concave die (2); The top of the concave die (2) is symmetrically fixedly connected with a sliding rod, the middle portion of the outer wall of the punch cylinder (3) is symmetrically fixedly connected with a sliding block, the middle portion of the two sliding rods is slidably connected with the two sliding blocks respectively, and the lower portion of the sliding rod is movably sleeved with a return spring; The bottom of the mold support base (1) is fixedly connected with an electric push rod, the movable end of the electric push rod is fixedly connected with a baffle matched with the bottom of the concave die (2), the two sides of the top of the mold support base (1) are fixedly connected with a support, and the top of the hydraulic telescopic cylinder (5) is fixedly connected with the upper portion of the support.

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