Pressing die for neodymium-iron-boron magnet

Abstract

The invention relates to the field of neodymium-iron-boron magnet pressing dies, in particular to a neodymium-iron-boron magnet pressing die which comprises a die supporting seat, a female die fixedly connected to the top of the die supporting seat, a male die barrel movably connected to the top of the female die, a storage barrel fixedly connected to the top of the male die barrel, and a hydraulic telescopic cylinder. And the hydraulic telescopic cylinder is movably connected to the inner top surface of the storage barrel. The pressing die of the neodymium-iron-boron magnet is composed of a sealing switching mechanism and an excess material removing mechanism. Through cooperative use of a male die barrel, a hydraulic telescopic cylinder, a sealing switching mechanism and other components, in the process that hydraulic telescopic drives a pressing rod and the male die barrel to move downwards to be matched with a female die to conduct pressing production, under cooperation of the sealing switching mechanism, magnetic powder can be automatically supplemented in the male die barrel in the ascending process, and therefore the pressing efficiency is improved. And in the downward moving process of the male die barrel, the magnetic powder can be guided into the female die for pressing production, the procedure switching and the waiting period of mechanical actions can be effectively shortened, and the efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of NdFeB magnet pressing dies, in particular to a NdFeB magnet pressing die. Background Art

[0002] NdFeB permanent magnet material is a permanent magnet material based on intermetallic compounds. During the production process, the magnetic powder is first pressed into a certain shape, size, density and strength through a pressing mold, and then sintered into shape.

[0003] The following problems exist in the existing technology and have not been well solved: 1. During the use of some existing NdFeB magnet pressing molds, it is necessary to first add magnetic powder into the inside of the die cavity, and then use the punch to press the magnetic powder inside the die into shape. During this operation, loading and pressing are composed of two separate operation processes, which affects work efficiency. Summary of the Invention

[0004] The present invention aims to provide a pressing die for NdFeB magnets to solve the problems raised in the above-mentioned background technology: 1. During use, the existing pressing die for NdFeB magnets requires the loading and pressing of magnetic powder to be completed in two separate operations, which affects work efficiency. To achieve the above-mentioned object, the present invention provides the following technical solution: A pressing die for NdFeB magnets, comprising: A mold support seat, wherein the top of the mold support seat is fixedly connected to a female mold, the top of the female mold is movably connected to a male mold cylinder, and the top of the male mold cylinder is fixedly connected to a material storage cylinder; The invention also includes: a hydraulic telescopic cylinder, which is movably mounted at the axis of the storage barrel, and a seal switching mechanism is movably connected between the movable end of the hydraulic telescopic cylinder and the inner wall of the storage barrel, and the state of the seal switching mechanism is switched during the pressing operation of the punch barrel driven by the hydraulic telescopic cylinder; A residual material removing mechanism is movably connected between the inner wall of the male mold cylinder and the lower part of the sealing switching mechanism.

[0005] Preferably, the sealing switching mechanism includes a pressure rod, which is 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, and the sealing cone sleeve is movably inserted between the punch cylinder and the storage cylinder. The outer wall of the sealing cone sleeve is symmetrically provided with L-shaped guide grooves, the inner wall of the storage barrel is symmetrically fixedly connected with guide rods, and the two guide rods are respectively slidably connected to the inside of the two L-shaped guide grooves, the outer wall of the sealing cone sleeve is symmetrically fixedly connected with a main wedge-shaped block, and the upper part of the inner wall of the punch barrel is fixedly connected with a slave wedge-shaped block that cooperates with the main wedge-shaped block; The upper part of the inner wall of the sealing conical sleeve is symmetrically and fixedly connected with a reset block, and the surface of the pressure rod is fixedly connected with a reset rod that cooperates with the reset block; The inner wall of the sealing conical sleeve is symmetrically hinged with cushion rods, the upper part of the pressure rod is fixedly connected with an arc-shaped cushion plate that cooperates with the cushion rods, the surface of the pressure rod is fixedly connected with a cushion ring, the top of the cushion ring is fixedly connected with a compression spring, and the top of the compression spring is lapped on the bottom of the sealing conical sleeve; The bottom of the pressure rod is fixedly connected with a sealing conical block, and the inner wall of the punch cylinder is provided with a conical chamber that cooperates with the sealing conical block.

[0006] 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 be one-fourth of the outer diameter of the sealing conical sleeve.

[0007] Preferably, the inner wall of the sealing conical sleeve is symmetrically provided with sunk grooves, a hinge rod is fixedly connected between the two sides of the inner wall of the sunk groove, the two cushion rods correspond to the two sunk grooves one by one, and the cushion rods are rotatably connected to the surface of the corresponding hinge rod.

[0008] Preferably, the waste material removing mechanism includes support blocks. There are two support blocks, and the two support blocks are symmetrically and fixedly connected to the upper part of the inner wall of the punch cylinder. The middle part of the support block is vertically slidably connected with an impact rod, and a return spring that cooperates with the support block is movably sleeved on the upper part of the impact rod; The bottom of the impact rod is fixedly connected with an air bag, the side wall of the air bag is fixedly connected with a piston cylinder, one end of the piston cylinder is fixedly connected with a U-shaped adjusting block, and limiting blocks are symmetrically and fixedly connected to the inner wall of the U-shaped adjusting block; The surface of the pressure rod is fixedly sleeved with an adjusting ring, grooves are symmetrically opened on both sides of the adjusting ring, and a T-shaped limiting rod that cooperates with the limiting block is hinged inside the groove.

[0009] Preferably, the bottom of the impact rod is fixedly connected with an arc-shaped mounting plate, the air bag is fixedly connected inside the arc-shaped mounting plate, and the upper part of the conical chamber is provided with a conical surface that cooperates with the air bag; 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 air outlet of the air bag.

[0010] Preferably, the inner bottom surface of the groove is a slope, and the length of the end of the T-shaped limiting rod away from the pressure rod is set to be 0.8 times the distance between the inner walls of the U-shaped adjusting block.

[0011] Preferably, a guide ring is movably sleeved on the lower part of the punch cylinder, a connecting spring is fixedly connected between the top of the guide ring and the surface of the punch cylinder, and the bottom of the guide ring is lapped on the top of the die; The top of the female mold is symmetrically and fixedly connected with sliding rods, the middle part of the outer wall of the male mold cylinder is symmetrically and fixedly connected with sliders, the two sliding rods are respectively slidably connected in the middle parts of the two sliders, and a return spring is movably sleeved on the lower part of the sliding rod; The bottom of the mold support base is fixedly connected with an electric push rod, the movable end of the electric push rod is fixedly connected with a baffle plate that matches the bottom of the female mold, a bracket is fixedly connected between the two sides at the top of the mold support base, and the top of the hydraulic telescopic cylinder is fixedly connected with the upper part of the bracket.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In the present invention, through the combined use of components such as the male mold cylinder, the hydraulic telescopic cylinder, and the sealing switching mechanism, during the process of the hydraulic telescopic cylinder driving the pressure rod and the male mold cylinder to move downward to cooperate with the female mold for the pressing production process, with the cooperation of the sealing switching mechanism, the male mold cylinder can automatically replenish magnetic powder inside during the ascending process, and the magnetic powder can be introduced into the female mold during the descending process of the male mold cylinder for pressing production, which can effectively reduce the waiting period for process switching and mechanical actions and improve the production and processing efficiency.

[0013] In the present invention, through the combined use of components such as the male mold cylinder, the pressure rod, and the waste material removing mechanism, during the process of the pressure rod driving the male mold cylinder to move downward to replenish magnetic powder inside the female mold, the waste material removing mechanism is driven by the pressure rod to impact on the inner wall position of the male mold cylinder, causing the male mold cylinder to vibrate and shake off the residual magnetic powder on the inner wall, reducing the occurrence of residual magnetic powder on the inner wall of the male mold cylinder. Description of the Drawings

[0014] Figure 1 It is a three-dimensional view of the position of the female mold and the male mold cylinder of the present invention; Figure 2 It is a cross-sectional view of the position of the female mold and the male mold cylinder of the present invention; Figure 3 It is a cross-sectional view of the partial position of the male mold cylinder and the material storage cylinder of the present invention; Figure 4 It is for the present invention Figure 3 The enlarged view of the structure at A in the figure; Figure 5 It is a three-dimensional view of the partial position of the sealing cone sleeve and the L-shaped guide groove of the present invention; Figure 6 It is a cross-sectional view of the partial position of the sealing cone sleeve and the arc-shaped backing plate of the present invention; Figure 7 It is a cross-sectional view of the partial position of the male mold cylinder and the adjusting ring of the present invention; Figure 8 It is for the present invention Figure 7 The enlarged view of the structure at B in the figure; Figure 9 It is for the present invention Figure 7 The enlarged view of the structure at C in the figure; Figure 10 This is a three-dimensional view of the partial position of the pressure bar and the T-shaped limit bar of the present invention; Figure 11 This is a cross-sectional view of the partial position of the cushion bar and the arc-shaped cushion plate of the present invention; Figure 12 This is a cross-sectional view of the partial position of the reset block and the reset rod of the present invention; Figure 13 This is a three-dimensional view of the partial position of the main wedge-shaped block and the secondary wedge-shaped block of the present invention; Figure 14 This is a cross-sectional view of the partial position of the sealing cone sleeve and the cushion bar of the present invention; Figure 15 This is a three-dimensional view of the hydraulic telescopic cylinder of the present invention.

[0015] In the figure: 1, die support base; 2, female die; 3, male die cylinder; 4, material storage cylinder; 5, hydraulic telescopic cylinder; 6, sealing switching mechanism; 601, pressure bar; 602, sealing cone sleeve; 603, L-shaped guide groove; 604, guide rod; 605, main wedge-shaped block; 606, secondary wedge-shaped block; 607, reset block; 608, reset rod; 609, cushion bar; 610, arc-shaped cushion plate; 611, cushion ring; 612, compression spring; 613, sealing cone block; 614, conical chamber; 7, residue removal mechanism; 701, support block; 702, impact rod; 703, return spring; 704, airbag; 705, piston cylinder; 706, U-shaped adjustment block; 707, limit block; 708, adjustment ring; 709, groove; 710, T-shaped limit bar. Detailed implementation manners

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0017] Please refer to Figures 1 to 15 , the present invention provides a technical solution: a pressing die for neodymium iron boron magnets, including: A die support base 1, the top of the die support base 1 is fixedly connected with a female die 2, the top of the female die 2 is movably connected with a male die cylinder 3, and the top of the male die cylinder 3 is fixedly connected with a material storage cylinder 4.

[0018] It further includes: a hydraulic telescopic cylinder 5, the hydraulic telescopic cylinder 5 is movably installed at the axial center position of the material storage cylinder 4, and 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, and the state of the sealing switching mechanism 6 is converted during the pressing operation of driving the male die cylinder 3 by the hydraulic telescopic cylinder 5.

[0019] There is a waste material cleaning mechanism 7 movably connected between the inner wall of the punch cylinder 3 and the lower part of the sealing switching mechanism 6. It should be noted that: the waste material cleaning mechanism 7 is used to clean the residual magnetic powder inside the punch cylinder 3.

[0020] In this embodiment, as Figures 1 to 15 shown, the sealing switching mechanism 6 includes a pressure rod 601. The pressure rod 601 is fixedly connected to the movable end of the hydraulic telescopic cylinder 5. The surface of the hydraulic telescopic cylinder 5 is movably sleeved with a sealing cone sleeve 602. The sealing cone sleeve 602 is movably inserted between the punch 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 that cooperates with the sealing cone sleeve 602. When the sealing cone sleeve 602 moves down to the limit position inside the material storage cylinder 4, the inner bottom surface position of the material storage cylinder 4 is sealed through the cooperation of the conical surface at 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. And the upper part of the sealing cone sleeve 602 is made of rubber material, which can generate a certain deformation effect while improving the sealing effect; the movable end of the hydraulic telescopic cylinder 5 cannot rotate, preventing the pressure rod 601 from rotating and affecting the use effect.

[0021] The outer wall of the sealing cone sleeve 602 is symmetrically provided with L-shaped guide grooves 603. The inner wall of the material storage cylinder 4 is symmetrically and fixedly connected with guide rods 604. The two guide rods 604 are respectively slidably connected inside the two L-shaped guide grooves 603. The outer wall of the sealing cone sleeve 602 is symmetrically and fixedly connected with main wedge-shaped clamping blocks 605. The upper part of the inner wall of the punch cylinder 3 is fixedly connected with secondary wedge-shaped clamping blocks 606 that cooperate with the main wedge-shaped clamping blocks 605. It should be noted that: when the sealing cone sleeve 602 moves down inside the material storage cylinder 4, the guide rods 604 on the inner wall of the material storage cylinder 4 cooperate with the L-shaped guide grooves 603 on the outer wall of the sealing cone sleeve 602 to slide, enabling the sealing cone sleeve 602 to rotate 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 down and rotate to the bottom position of the secondary wedge-shaped clamping blocks 606 on the inner wall of the punch cylinder 3. The secondary wedge-shaped clamping blocks 606 limit the main wedge-shaped clamping blocks 605 and the sealing cone sleeve 602 in the current position. And the opposite ends of the main wedge-shaped clamping blocks 605 and the secondary wedge-shaped clamping blocks 606 are both provided with inclined surfaces, facilitating the clamping cooperation between the main wedge-shaped clamping blocks 605 and the secondary wedge-shaped clamping blocks 606.

[0022] The upper part of the inner wall of the sealing cone sleeve 602 is symmetrically and fixedly connected with reset blocks 607. The surface of the pressure rod 601 is fixedly connected with reset rods 608 that cooperate with the reset blocks 607. It should be noted that: the bottom of the reset block 607 is provided with an inclined surface. When the pressure rod 601 drives the reset rod 608 to move up and reset, the reset rod 608 will contact the inclined surface at the bottom of the reset block 607, causing the reset block 607 to drive the sealing cone sleeve 602 to rotate.

[0023] The inner wall of the sealing cone sleeve 602 is symmetrically hinged with a pad rod 609, the upper part of the pressure rod 601 is fixedly connected to an arc-shaped pad plate 610 that matches the pad rod 609, the surface of the pressure rod 601 is fixedly connected to a gasket ring 611, the top of the gasket ring 611 is fixedly connected to a compression spring 612, and the top of the compression spring 612 overlaps the bottom of the sealing cone sleeve 602. It should be noted that when the pressure rod 601 moves downward, it will be pressed against the surface of the pad rod 609 on the inner wall of the sealing cone sleeve 602 through the arc-shaped pad plate 610, and the sealing cone sleeve 602 is moved downward by the pressure rod 601. After the sealing cone sleeve 602 moves downward and rotates ninety degrees, the pad rod 609 will release the contact with the arc-shaped pad plate 610, so that the pressure rod 601 can continue to move downward, and the sealing cone sleeve 602, after rotating ninety degrees, will rotate to the reset block 607 on the surface of the pressure rod 601. Above the positioning rod 608, when the pressure rod 601 moves up and resets to the limit, the pressure rod 601 will bring the reset rod 608 into contact with the bottom of the reset block 607, causing the reset block 607 to rotate with the sealing cone sleeve 602. At this time, the sealing cone sleeve 602 brings the main wedge-shaped block 605 to release the limiting state with the slave wedge-shaped block 606, and is elastically restored by the compression spring 612 to bring the sealing cone sleeve 602 up, so that the magnetic powder inside the storage barrel 4 falls into the inside of the punch barrel 3, completing automatic loading.

[0024] The bottom of the pressure rod 601 is fixedly connected to a sealing cone block 613, and the inner wall of the punch barrel 3 is configured as a conical chamber 614 that cooperates with the sealing cone block 613. It should be noted that when the pressure rod 601 rises to its limit state, the sealing cone block 613 cooperates with the inner wall of the middle part of the conical chamber 614 to seal the middle position of the punch barrel 3. When the pressure rod 601 moves down to its limit state, the bottom of the sealing cone block 613 will be flush with the inner bottom surface of the conical chamber 614, so that the sealing cone block 613 that continues to move downward will move the punch barrel 3 downward synchronously and cooperate with the die 2 to perform pressing production.

[0025] In this embodiment, Figures 1 to 15 As shown, the upper portion of the L-shaped guide groove 603 is tilted, and the horizontal distance between the two ends of the L-shaped guide groove 603 is set to one-quarter of the outer diameter of the sealing cone sleeve 602. It should be noted that a discharge groove is provided on the inner bottom surface of the L-shaped guide groove 603 to prevent residual magnetic powder inside the L-shaped guide groove; the vertical distance between the top of the main wedge-shaped clamping block 605 and the bottom of the secondary wedge-shaped clamping block 606 is the same as the distance between the upper and lower ends of the L-shaped guide groove 603. This ensures that during the downward movement of the sealing cone sleeve 602, when the guide rod 604 moves from one end of the L-shaped guide groove 603 to the other, the main wedge-shaped clamping block 605 can move downward with the sealing cone sleeve 602 to the lower position of the secondary wedge-shaped clamping block 606; at the same time, the horizontal distance of the L-shaped guide groove 603 is set so that the sealing cone sleeve 602 can stably rotate 90 degrees during the downward movement.

[0026] In this embodiment, Figures 1 to 15As shown, the inner wall of the sealing cone sleeve 602 is symmetrically provided with recessed grooves, and a hinged rod is fixedly connected between the two sides of the inner wall of the recessed groove. Two pad rods 609 correspond to the two recessed grooves one by one, and the pad rods 609 are rotatably connected to the surface of the corresponding hinged rod. When the pressure rod 601 moves downward with the arc pad 610, it will press the pad 609 and the sealing cone sleeve 602 downward. When the pressure rod 601 moves up with the arc pad 610 and resets, the pad 609 can flip upward inside the trough. At this time, the pressure rod 601 cannot move up with the pad 609 and the sealing cone sleeve 602 through the arc pad 610; the length of the arc pad 610 is set to one-fourth of the inner diameter of the sealing cone sleeve 602. When the sealing cone sleeve 602 rotates ninety degrees, the arc pad 610 releases the contact with the pad 609; the inner wall of the trough is provided with a rubber pad for resetting the pad 609 after deflection. After the pad 609 is released from pressure, the rubber pad brings the pad 609 to reset and flip. The rubber pad is a prior art and will not be described in detail here.

[0027] In this embodiment, Figures 1 to 15 As shown, the residual material removal mechanism 7 includes a support block 701, which is provided with two support blocks 701. The two support blocks 701 are symmetrically fixedly connected to the upper part of the inner wall of the punch cylinder 3. The middle part of the support block 701 is vertically slidably connected to the impact rod 702, and the upper part of the impact rod 702 is movably sleeved with a return spring 703 that cooperates with the support block 701. It should be noted that: a directional groove is provided on the surface of the impact rod 702, and a directional block that cooperates with the directional groove is fixedly connected to the inner ring of the support block 701, so that the impact rod 702 can only slide vertically inside the support block 701 and cannot rotate, thereby preventing the impact rod 702 from rotating with the U-shaped adjustment block 706 and affecting the use effect, or the impact rod 702 is set as a rectangular rod. The above-mentioned anti-rotation settings are all existing technologies and will not be described in detail.

[0028] The bottom of the impact rod 702 is fixedly connected to an airbag 704, the side wall of the airbag 704 is fixedly connected to a piston cylinder 705, one end of the piston cylinder 705 is fixedly connected to a U-shaped adjustment block 706, and the inner wall of the U-shaped adjustment block 706 is symmetrically fixedly connected to a limit block 707; A regulating ring 708 is fixedly sleeved on the surface of the compression bar 601. Grooves 709 are symmetrically formed on both sides of the regulating ring 708. Inside the grooves 709, T-shaped limiting rods 710 that cooperate with the limiting blocks 707 are hinged. It should be noted that when the compression bar 601 drives the regulating ring 708 to move downward, the T-shaped limiting rods 710 on the regulating ring 708 will be lapped between the limiting blocks 707 on both inner walls of the U-shaped regulating block 706. The T-shaped limiting rods 710 drive the U-shaped regulating block 706, the airbag 704, and the impact rod 702 to move downward synchronously. When the airbag 704 presses against the conical surface at the inner wall of the conical chamber 614, the airbag 704 is compressed to inject gas into the inside of the piston cylinder 705, causing the piston cylinder 705 to drive the U-shaped regulating block 706 to extend. At this time, the T-shaped limiting rods 710 slide relative to each other between the two limiting blocks 707. After the T-shaped limiting rods 710 are disengaged from contact with the limiting blocks 707, the return spring 703 drives the impact rod 702 to rise and impact on the inner wall position of the punch cylinder 3. The generated vibration effect can shake off the magnetic powder remaining on the inner wall of the punch cylinder 3, reducing the situation of magnetic powder residue.

[0029] In this embodiment, as Figures 1 to 15 shown, an arc-shaped mounting plate is fixedly connected to the bottom of the impact rod 702. The airbag 704 is fixedly connected inside the arc-shaped mounting plate. The upper part of the conical chamber 614 is provided with a conical surface that cooperates with the airbag 704.

[0030] The piston cylinder 705 is fixedly connected to the side wall of the arc-shaped mounting plate. The air inlet end of the piston cylinder 705 is fixedly connected to the exhaust port of the airbag 704. It should be noted that when the bottom of the airbag 704 is released from the compressed state, the piston cylinder 705 can automatically reset, causing the gas inside the piston cylinder 705 to flow back into the airbag 704. Here, the piston cylinder 705 is a prior art and will not be described in detail.

[0031] In this embodiment, as Figures 1 to 15 shown, the inner bottom surface of the groove 709 is provided as an inclined surface. The length of the end of the T-shaped limiting rod 710 away from the compression bar 601 is set to 0.8 times the distance between the inner walls of the U-shaped regulating block 706. It should be noted that due to the inclined surface at the bottom of the groove 709, when the compression bar 601 drives the T-shaped limiting rod 710 to rise and the top of the T-shaped limiting rod 710 contacts the limiting block 707, the T-shaped limiting rod 710 can be flipped downward in the groove 709 to be in an inclined state and disengage from the position of the limiting block 707, avoiding interference and preventing magnetic powder from remaining inside the groove 709. And when the T-shaped limiting rod 710 moves on the surface of the limiting block 707, it can push off the magnetic powder on the surface of the limiting block 707, reducing the remaining situation. A torsion spring is provided between the surface of the T-shaped limiting rod 710 and the inner wall of the groove 709 to facilitate the reset of the flipped T-shaped limiting rod 710. A rubber pad for resetting the T-shaped limiting rod 710 can also be provided inside the groove 709. The above torsion spring and rubber pad are both prior arts and will not be described in detail.

[0032] In this embodiment, as Figures 1 to 15 shown, a material guiding ring is movably sleeved on the lower part of the punch cylinder 3. A connecting spring is fixedly connected between the top of the material guiding ring and the surface of the punch cylinder 3. The bottom of the material guiding ring is lapped on the top of the die 2. It should be noted that: through the arrangement of the material guiding ring, the magnetic powder discharged from the inside of the punch cylinder 3 can accurately fall into the cavity of the die 2.

[0033] Sliding rods are symmetrically and fixedly connected to the top of the die 2. The middle parts of the outer walls of the punch cylinder 3 are symmetrically and fixedly connected with sliders. The two sliding rods are respectively slidably connected to the middle parts of the two sliders. A return spring is movably sleeved on the lower part of the sliding rod. It should be noted that: the cooperation of the sliding rod and the slider guides the downward movement of the punch cylinder 3 to ensure that the punch cylinder 3 can be stably inserted into the die 2 for pressing production.

[0034] An electric push rod is fixedly connected to the bottom of the mold support base 1. The movable end of the electric push rod is fixedly connected with a baffle plate that cooperates with the bottom of the die 2. A bracket is fixedly connected between the two sides of the top of the mold support base 1. The top of the hydraulic telescopic cylinder 5 is fixedly connected with the upper part of the bracket. It should be noted that: pulling the baffle plate to move by the electric push rod can unload the pressed neodymium iron boron magnet in the die 2. This operation is a prior art and will not be described in detail here.

[0035] The usage method and advantages of the present invention: For the pressing mold of the neodymium iron boron magnet, the working process is as follows: As Figures 1 to 15 shown, when in use, start the hydraulic telescopic cylinder 5 to drive the pressure rod 601 to move downward for pressing operation. At this time, the arc-shaped backing plate 610 on the upper part of the pressure rod 601 moves downward and presses against the position of the cushion rod 609 on the inner wall of the sealing cone sleeve 602, so that the cushion rod 609 drives the sealing cone sleeve 602 to move downward between the two guide rods 604. At this time, the guide rod 604 cooperates with the L-shaped guide groove 603 on the surface of the sealing cone sleeve 602 to slide, so that the sealing cone sleeve 602 moves downward and rotates by 90 degrees. When the sealing cone sleeve 602 is about to move downward to the limit position, the main wedge-shaped clamping block 605 on the outer wall of the sealing cone sleeve 602 moves to the lower position of the secondary wedge-shaped clamping block 606 on the inner wall of the punch cylinder 3, and as the sealing cone sleeve 602 rotates, the main wedge-shaped clamping block 605 is clamped at the bottom of the secondary wedge-shaped clamping block 606, and the rotated sealing cone sleeve 602 drives the cushion rod 609 to release the contact with the arc-shaped backing plate 610, so that the pressure rod 601 can continue to move downward; Meanwhile, the downward-moving pressure rod 601 drives the sealing cone block 613 to release the 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 chamber 614 of the punch cylinder 3 to fall from the outer side of the sealing cone block 613 to the bottom of the punch cylinder 3. The magnetic powder falls into the inside of the die 2 under the guiding action of the material guiding ring. At this time, the adjusting ring 708 on the pressure rod 601 drives the T-shaped limiting rod 710 to press 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 drive the airbag 704 and the impact rod 702 to move downward synchronously through the piston cylinder 705. When the airbag 704 presses against the middle conical surface position of the conical chamber 614, the airbag 704 is compressed, causing the piston cylinder 705 to extend and drive the U-shaped adjusting block 706 to move. At this time, the limiting block 707 on the U-shaped adjusting block 706 gradually releases the contact with the T-shaped limiting rod 710. Then, the return spring 703 drives the impact rod 702 to reset and rise and impact against the upper position 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 adhering to the inner wall of the punch cylinder 3, effectively reducing the residual magnetic powder in the conical chamber 614; As the pressure rod 601 continues to move downward, the bottom of the pressure rod 601 is caught in the inner bottom surface position of the conical chamber 614 and then drives the punch cylinder 3 to move downward synchronously, causing the punch cylinder 3 to enter the inside of the die 2 for neodymium iron boron magnet pressing production. When the hydraulic telescopic cylinder 5 drives the pressure rod 601 to rise and reset, the compression spring 612 on the surface gasket 611 of the pressure rod 601 presses against the bottom of the sealing cone sleeve 602. At this time, under the cooperation and limitation of the main wedge-shaped block 605 and the secondary wedge-shaped block 606, the sealing cone sleeve 602 cannot rise. When the pressure rod 601 is about to rise to the limit position, it drives the reset rod 608 to slide in cooperation with the reset block 607 on the inner wall of the sealing cone sleeve 602, causing the sealing cone sleeve 602 to rotate in the reverse direction. At this time, the main wedge-shaped block 605 and the secondary wedge-shaped block 606 are released from the limiting state, causing the compression spring 612 to press the sealing cone sleeve 602 to rise and reverse and reset, so that the magnetic powder in the storage cylinder 4 falls into the upper part of the conical chamber 614 quantitatively, completing the automatic feeding operation.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A pressing die for neodymium iron boron magnets, comprising: A die support base (1), the top of the die support base (1) is fixedly connected with a female die (2), the top of the female die (2) is movably connected with a punch cylinder (3), and the top of the punch cylinder (3) is fixedly connected with a material storage cylinder (4); It is characterized in that it further comprises: A hydraulic telescopic cylinder (5), the hydraulic telescopic cylinder (5) is movably installed at the axial center position of the material storage cylinder (4), and 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), and the state of the sealing switching mechanism (6) is switched during the pressing operation of driving the punch cylinder (3) by the hydraulic telescopic cylinder (5); A surplus material removing mechanism (7) is movably connected between the inner wall of the punch cylinder (3) and the lower part of the sealing switching mechanism (6).

2. The pressing die for a neodymium iron boron magnet according to claim 1, wherein: The sealing switching mechanism (6) includes a pressure rod (601), the pressure rod (601) is fixedly connected to the movable end of the hydraulic telescopic cylinder (5), and a sealing cone sleeve (602) is movably sleeved on the surface of the hydraulic telescopic cylinder (5), and the sealing cone sleeve (602) is movably inserted between the punch cylinder (3) and the material storage cylinder (4); L-shaped guide grooves (603) are symmetrically arranged on the outer wall of the sealing cone sleeve (602), guide rods (604) are symmetrically fixedly connected to the inner wall of the material storage cylinder (4), and the two guide rods (604) are respectively slidably connected inside the two L-shaped guide grooves (603), and main wedge-shaped clamping blocks (605) are symmetrically fixedly connected to the outer wall of the sealing cone sleeve (602), and secondary wedge-shaped clamping blocks (606) matching the main wedge-shaped clamping blocks (605) are fixedly connected to the upper part of the inner wall of the punch cylinder (3); Reset blocks (607) are symmetrically fixedly connected to the upper part of the inner wall of the sealing cone sleeve (602), and reset rods (608) matching the reset blocks (607) are fixedly connected to the surface of the pressure rod (601); Pad rods (609) are symmetrically hinged to the inner wall of the sealing cone sleeve (602), arc-shaped backing plates (610) matching the pad rods (609) are fixedly connected to the upper part of the pressure rod (601), a pad ring (611) is fixedly connected to the surface of the pressure rod (601), and a compression spring (612) is fixedly connected to the top of the pad ring (611), and the top of the compression spring (612) abuts against the bottom of the sealing cone sleeve (602); A sealing cone block (613) is fixedly connected to the bottom of the pressure rod (601), and the inner wall of the punch cylinder (3) is provided with a conical cavity (614) matching the sealing cone block (613).

3. The pressing die for a neodymium iron boron magnet according to claim 2, wherein: The upper part of the L-shaped guide groove (603) is inclined, and the horizontal distance between the two ends of the L-shaped guide groove (603) is set to be one-fourth of the outer diameter of the sealing cone sleeve (602).

4. The pressing die for a neodymium iron boron magnet according to claim 3, wherein: Sink grooves are symmetrically arranged on the inner wall of the sealing cone sleeve (602), hinge rods are fixedly connected between the two sides of the inner wall of the sink grooves, and the two pad rods (609) correspond to the two sink grooves one by one, and the pad rods (609) are rotatably connected to the surface of the corresponding hinge rods.

5. The pressing die for a neodymium iron boron magnet according to claim 4, wherein: The remaining material removal mechanism (7) includes support blocks (701). There are two support blocks (701), and the two support blocks (701) are symmetrically and fixedly connected to the upper part of the inner wall of the punch cylinder (3). A striking rod (702) is vertically slidably connected to the middle of the support block (701). A return spring (703) that cooperates with the support block (701) is movably sleeved on the upper part of the striking rod (702); A gas bag (704) is fixedly connected to the bottom of the striking rod (702). A piston cylinder (705) is fixedly connected to the side wall of the gas bag (704). A U-shaped adjustment block (706) is fixedly connected to one end of the piston cylinder (705). Limiting blocks (707) are symmetrically and fixedly connected to the inner wall of the U-shaped adjustment block (706); An adjustment ring (708) is fixedly sleeved on the surface of the pressure rod (601). Grooves (709) are symmetrically formed on both sides of the adjustment ring (708). A T-shaped limiting rod (710) that cooperates with the limiting block (707) is hinged inside the groove (709).

6. The pressing die for a neodymium iron boron magnet according to claim 5, characterized in that: An arc-shaped mounting plate is fixedly connected to the bottom of the striking rod (702). The gas bag (704) is fixedly connected inside the arc-shaped mounting plate. The upper part of the conical chamber (614) is provided with a conical surface that cooperates with the gas bag (704); The piston cylinder (705) is fixedly connected to the side wall of the arc-shaped mounting plate. The air inlet end of the piston cylinder (705) is fixedly connected to the exhaust port of the gas bag (704).

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

8. A pressing die for a neodymium iron boron magnet according to claim 7, characterized in that: A material guiding ring is movably sleeved on the lower part of the punch cylinder (3). A connecting spring is fixedly connected between the top of the material guiding ring and the surface of the punch cylinder (3). The bottom of the material guiding ring is lapped on the top of the female die (2); Sliding rods are symmetrically and fixedly connected to the top of the female die (2). Sliders are symmetrically and fixedly connected to the middle of the outer wall of the punch cylinder (3). The two sliding rods are respectively slidably connected to the middle of the two sliders. A return spring is movably sleeved on the lower part of the sliding rod; An electric push rod is fixedly connected to the bottom of the mold support base (1). A baffle that cooperates with the bottom of the female die (2) is fixedly connected to the movable end of the electric push rod. A support is fixedly connected between the two sides at the top of the mold support base (1). The top of the hydraulic telescopic cylinder (5) is fixedly connected to the upper part of the support.

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