A forming apparatus for neodymium-iron-boron cylinders

Abstract

The application discloses a forming equipment for neodymium iron boron small cylinders, which comprises a directional forming assembly for magnetically orienting neodymium iron boron powder into neodymium iron boron small cylinders, a staged die assembly for uniformly spacing the neodymium iron boron small cylinders, and a mold turnover assembly for arranging and transporting the neodymium iron boron small cylinders, wherein the neodymium iron boron powder sequentially passes through the directional forming assembly, the staged die assembly and the mold turnover assembly to complete the forming and transportation of the neodymium iron boron small cylinders, and the neodymium iron boron small cylinders are convenient for subsequent isostatic pressing treatment. The application provides a forming equipment for neodymium iron boron small cylinders, which unifies the magnetic direction of neodymium iron boron powder, guarantees the magnetic field uniformity during the forming of the neodymium iron boron powder, and reduces the magnetic field strength difference of the neodymium iron boron small cylinders after magnetization.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of neodymium iron boron material processing, in particular to a kind of neodymium iron boron small cylinder forming equipment. BACKGROUND

[0002] Since neodymium iron boron permanent magnet has high saturation magnetization, coercive force and magnetic energy product, it has been widely used in energy, transportation, machinery, medical treatment, household appliances, IT and other industries since its advent, and its products involve many fields of national economy.A complete neodymium iron boron magnet needs to go through the steps of batching, smelting, hydrogen crushing, airflow grinding, forming, isostatic pressing, oil stripping, sintering and processing forming, among which the steps of hydrogen crushing and airflow grinding are used to powderize neodymium iron boron material for subsequent forming.

[0003] The traditional forming method is to simply fill neodymium iron boron powder into the corresponding mold, and then perform isostatic pressing, but this process ignores the small amount of magnetism of neodymium iron boron powder that has not been completely eliminated. During the forming of neodymium iron boron powder, the directions of the magnetism are opposite, so the magnetism cancels each other out, and the directions are the same, so the magnetism is superimposed. Therefore, after the neodymium iron boron powder is formed, although it is produced from the same batch of material, there is a slight difference in magnetic field strength between each neodymium iron boron magnet after magnetization is completed. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a neodymium iron boron small cylinder forming equipment that unifies the magnetic direction of neodymium iron boron powder, ensures the magnetic field uniformity of neodymium iron boron powder during forming, and reduces the magnetic field strength difference of neodymium iron boron small cylinder after magnetization.

[0005] The application solves the above problems by adopting the technical scheme of a neodymium iron boron small cylinder forming device, which comprises a directional forming assembly for directional forming of neodymium iron boron powder magnetic poles into neodymium iron boron small cylinders, a hierarchical mold loading assembly for uniformly and interval arraying the neodymium iron boron small cylinders, and a mold turnover assembly for arranging and transporting the neodymium iron boron small cylinders. The neodymium iron boron powder sequentially passes through the directional forming assembly, the hierarchical mold loading assembly and the mold turnover assembly to complete the forming and transportation of the neodymium iron boron small cylinders, facilitating subsequent isostatic pressing of the neodymium iron boron small cylinders. The directional forming assembly comprises an upper mold and a lower mold. The upper mold is movably connected above the lower mold along the longitudinal direction. When the upper mold and the lower mold are closed, a mold cavity for forming multiple neodymium iron boron small cylinders from the neodymium iron boron powder is formed between the upper mold and the lower mold. The two ends of the mold cavity are provided with abutting blocks for forming the ends of the neodymium iron boron small cylinders. Directional magnetic poles are further provided on both sides of the mold cavity. The directional magnetic pole at one end is an S pole, and the directional magnetic pole at the other end is an N pole. The hierarchical mold loading assembly uniformly and interval arrays the neodymium iron boron small cylinders with directional magnetic poles along the horizontal direction into the mounting mold. The mold turnover assembly turns over the mounting mold with the neodymium iron boron small cylinders mounted therein, so that the neodymium iron boron small cylinders are vertically placed, and the mounting mold is arranged and transported.

[0006] Compared with the prior art, the application has the advantages that: by using the directional forming assembly, before the upper mold and the lower mold are closed, the directional magnetic poles are turned on, so that the neodymium iron boron powder rotates or deviates according to its own magnetic properties, thereby ensuring the uniformity of the magnetic field direction of all the neodymium iron boron powder. Then, the neodymium iron boron powder is extruded by the closing of the upper mold and the lower mold and the abutting blocks at both ends of the mold cavity, so that the difference in magnetic field strength of the same batch of formed neodymium iron boron small cylinders after sintering and magnetization is smaller, and the magnetic field accuracy of the neodymium iron boron small cylinders is higher. Then, the neodymium iron boron small cylinders are installed by the hierarchical mold loading assembly, and arranged and transported by the mold turnover assembly, thereby realizing the automation of the neodymium iron boron small cylinders, improving the batch forming quality of the neodymium iron boron small cylinders, and improving the efficient production of the neodymium iron boron small cylinders.

[0007] As an improvement of the present application, the lower mold is fixedly connected to the moving seat, the moving seat is arranged on the conveying belt to move, the directional forming assembly further comprises a feeding hopper, the lower mold moves to the directional magnetic pole station after receiving the Nd-Fe-B powder in the feeding hopper station, the mold cavity comprises a lower mold cavity for forming the lower half of the Nd-Fe-B small cylinder, the lower end surface of the abutting block is lower than the lower end of the lower mold cavity, the upper end surface of the abutting block is higher than the upper end of the lower mold cavity, the side of the abutting block away from the lower mold is provided with an abutting spring, and the abutting spring is used to ensure the abutting state of the abutting block and the lower mold. Through the improvement, after the feeding in the lower mold, because the Nd-Fe-B powder is relatively dispersed before the mold is closed, the abutting spring is used to ensure that the abutting block and the lower mold always maintain the abutting state, and the lower end surface of the abutting block is lower than the lower end of the lower mold cavity, and the upper end surface of the abutting block is higher than the upper end of the lower mold cavity, so that the Nd-Fe-B powder cannot leak from the lower mold during the movement of the Nd-Fe-B powder from the feeding hopper station to the directional magnetic pole station.

[0008] As an improvement of the present application, the feeding hopper moves horizontally in the vertical direction of the moving direction of the conveying belt, the feeding hopper is fixedly connected to a moving plate, the moving plate is movably connected to a first abutting seat, the feeding hopper moves above the lower mold to feed when the first abutting seat abuts against the lower mold, the first abutting seat is arranged on one side of the lower mold, the other side of the lower mold is provided with a second abutting seat abutting against the lower mold, the upper surface of the second abutting seat is provided with a material collecting groove for collecting excess Nd-Fe-B powder, and the bottom surface of the material collecting groove is coplanar with the bottom surface of the moving plate. Through the improvement, the feeding hopper can be directly moved to the first abutting seat to close the lower end of the feeding hopper and complete the feeding blocking process in the non-feeding stage, and the leaked Nd-Fe-B powder can also be retained on the first abutting seat, without affecting the conveying process of the conveying belt, so that the feeding hopper deviates from the lower mold to avoid the situation that the Nd-Fe-B powder falls on the conveying belt in the non-feeding stage, thereby avoiding the fault of conveying interference of the conveying belt, and in the subsequent feeding process, the leaked Nd-Fe-B powder can be pushed to the lower mold through the moving plate to complete the utilization of the leaked Nd-Fe-B powder, and the design of the first abutting seat and the second abutting seat can form a containing groove for containing the Nd-Fe-B powder in the feeding hopper station of the lower mold, and in the feeding process, in order to ensure the sufficiency of feeding and avoid the unqualified Nd-Fe-B small cylinder in the subsequent forming, the feeding Nd-Fe-B powder often appears in excess, and the design of the material collecting groove can push the excess Nd-Fe-B powder into the material collecting groove, so as to realize the secondary utilization of the Nd-Fe-B powder in the material collecting groove and avoid the waste of the excess Nd-Fe-B powder.

[0009] As an improvement of the application, the step-by-step mold loading assembly is arranged at the end of the conveying belt, the step-by-step mold loading assembly comprises a support frame for supporting the Nd-Fe-B small cylinders and a push rod for pushing the Nd-Fe-B small cylinders from the lower mold to the support frame, the support frame comprises a first support frame and a second support frame, the first support frame comprises a plurality of first support grooves for supporting the Nd-Fe-B small cylinders, the plurality of first support grooves are arranged at intervals, the second support frame comprises a plurality of second support grooves for supporting the Nd-Fe-B small cylinders, the plurality of second support grooves are arranged at intervals, the bottom end of the first support frame is connected with a first driving air cylinder driven longitudinally, the bottom end of the second support frame is connected with a second driving air cylinder driven longitudinally, one second support groove is arranged between two adjacent first support grooves, in the initial position, the first support grooves and the second support grooves are arranged in the same horizontal plane for receiving the Nd-Fe-B small cylinders moved from the lower mold, under the driving of the first driving air cylinder and the second driving air cylinder, the first support grooves and the second support grooves are in different horizontal planes, and the distance between the first support groove and the adjacent second support groove, the distance between the first support groove and the adjacent first support groove, and the distance between the second support groove and the adjacent second support groove are equal, through the improvement, through the design of the push rod, the transfer of the Nd-Fe-B small cylinders from the directional forming assembly to the step-by-step mold loading assembly is realized, when the Nd-Fe-B small cylinders are moved to the support frame, the first support grooves and the second support grooves are arranged in the same horizontal plane, which facilitates the automatic feeding of the Nd-Fe-B small cylinders from the lower mold to the support frame, and then the first driving air cylinder and the second driving air cylinder are used to arrange the first support grooves and the second support grooves in two parallel planes in a staggered manner, and the distance between the first support groove and the adjacent second support groove, the distance between the first support groove and the adjacent first support groove, and the distance between the second support groove and the adjacent second support groove are equal, so that the Nd-Fe-B small cylinders placed in the first support grooves are separated from the Nd-Fe-B small cylinders placed in the second support grooves, when these Nd-Fe-B small cylinders are placed in the corresponding mounting holes, the distance between the adjacent Nd-Fe-B small cylinders is equal, during the isostatic pressing process, the extrusion forces between the Nd-Fe-B small cylinders are also equal, thereby ensuring the consistency of the forces on the Nd-Fe-B small cylinders during the isostatic pressing process and ensuring the high quality of the isostatic pressing process of the Nd-Fe-B small cylinders, this process can realize the rapid feeding process of the Nd-Fe-B small cylinders and realize the uniform and spaced array arrangement of the Nd-Fe-B small cylinders, thereby meeting the production requirements of automation more easily, reducing the preparation time of the isostatic pressing process, and improving the processing efficiency of the Nd-Fe-B small cylinders.

[0010] As an improvement of the application, the installation mold is arranged on the side of the support frame away from the conveying belt, the installation mold is provided with a set of installation holes, the set of installation holes includes a plurality of installation holes corresponding to the first support groove and the second support groove one by one, the other side of the support frame close to the side of the conveying belt is provided with a ejector rod, the ejector rod pushes the Nd-Fe-B small cylinders on the first support groove and the Nd-Fe-B small cylinders on the second support groove into the corresponding installation holes at the same time under the action of the third driving cylinder, the installation mold is provided with a plurality of sets of installation holes, the plurality of sets of installation holes are evenly arrayed along the longitudinal direction, the spacing between the two adjacent sets of installation holes is the same as the spacing between the two rows of installation holes in the same set of installation holes, the installation mold is placed on a moving table moving longitudinally, the moving table is movably connected to a screw transmission assembly driven by a motor, through the improvement, after the Nd-Fe-B small cylinders and the installation holes are completely aligned, the installation of the Nd-Fe-B small cylinders in a set of installation holes is completed by the ejector rod, the number of the Nd-Fe-B small cylinders that can be installed in the installation mold is increased, the manufacturing of the number of installation molds is reduced, and then the processing efficiency of the isostatic pressing can be accelerated, and the design of the movement of the moving table can meet the high-precision longitudinal movement of the installation mold, so that the installation of the Nd-Fe-B small cylinders in the plurality of sets of installation holes on the installation mold is realized.

[0011] As an improvement of the application, the moving table is provided with a guide plate, the guide plate is provided with a guide hole corresponding to the installation hole one by one, the diameter of the guide hole expands along the direction of the installation mold to the ejector rod, the minimum diameter of the guide hole is the same as the diameter of the installation hole, the guide plate is arranged between the installation mold and the ejector rod for guiding the Nd-Fe-B small cylinders to smoothly enter the installation hole, through the improvement, the design of the guide hole can correct the alignment deviation between the Nd-Fe-B small cylinders and the installation hole, and ensure the installation accuracy and smoothness of the Nd-Fe-B small cylinders.

[0012] As an improvement of the application, the side of the moving table close to the screw transmission assembly is provided with an abutment plate, the side of the installation mold abuts against the abutment plate, the moving table is further provided with a moving abutment block, the moving abutment block is movably connected to the side of the moving table away from the ejector rod by a fourth driving cylinder, when the installation mold installs the Nd-Fe-B small cylinders, the fourth driving cylinder drives the moving abutment block to clamp the installation mold between the guide plate and the moving abutment block, through the improvement, when the installation mold moves to the moving table, the abutment of the installation mold in two mutually perpendicular directions is guaranteed by the abutment of the abutment plate and the moving abutment block, so that the positioning of the installation mold on the moving table is guaranteed, and the guide hole and the installation hole are accurately aligned.

[0013] As an improvement of the application, the mold overturning assembly comprises a lifting plate arranged on the moving table and a overturning push rod for overturning the installation mold, the installation mold is arranged on the lifting plate, the lifting plate moves along the longitudinal direction to make the installation mold move up and down when the moving table remains stationary, the overturning push rod is arranged on the side of the installation mold away from the moving abutting block, the overturning push rod pushes the upper end of the installation mold under the action of the fifth driving cylinder, when the installation mold needs to be overturned, the lifting plate rises to form an overturning step with the moving abutting block, the overturning step is used to reduce the vibration amplitude of overturning, through the improvement, after the neodymium iron boron small cylinders are installed into the installation mold, one end face of the neodymium iron boron small cylinders lacks support, so the neodymium iron boron small cylinders need to be overturned from horizontal placement to vertical placement, so as to ensure that the unsintered neodymium iron boron small cylinders will not be loose in the subsequent transportation process, and in the overturning process, the vibration of overturning, the too fast speed of overturning or the too large overturning angle will also cause the neodymium iron boron small cylinders to be loose, so it is necessary to avoid the case that the installation mold overturns too fast and too large, it is necessary to reduce the overturning speed of the installation mold or reduce the amplitude of overturning, the overturning push rod is used to realize the overturning of the installation mold, and through the design of the overturning step, not only can the overturning angle of the installation mold be reduced and the overturning amplitude of the installation mold be reduced, but also the acceleration time of the installation mold in the free overturning process is reduced, so that the instantaneous speed of the installation mold when contacting the overturning step is low, thereby reducing the vibration amplitude of the installation mold in the overturning process and avoiding the case that the neodymium iron boron small cylinders are loose in the overturning process.

[0014] As an improvement of the application, the fifth driving cylinder is connected with the turnover push rod through a connecting plate, and a plurality of separation rods for separating the guide plate from the installation mold are arranged on the connecting plate, the guide plate is provided with separation holes for the separation rods to pass through the guide plate and abut against the installation mold, the plurality of separation rods are arranged along the circumference of the installation mold, one end of the separation rod is used to abut against the installation mold, the other end of the separation rod is movably connected to the connecting plate, the middle part of the separation rod is provided with a baffle, a spring is arranged between the baffle and the connecting plate, and the longitudinal movement track of the separation rod is arranged in a staggered manner with the guide hole. Through the improvement, the installation mold is clamped by the guide plate and the moving abutting block during the installation of the neodymium iron boron small cylinder into the installation mold. Since the neodymium iron boron small cylinder is installed from the direction of the guide plate, some adhesion phenomenon exists between the guide plate and the installation mold. Through the design of the separation rod, the adhesion between the installation mold and the guide plate can be removed before the installation mold is turned over, so that the installation mold is conveniently turned over by the subsequent turnover push rod. Meanwhile, the design of the separation rod can also cause a gap between the guide plate and the installation mold, provide a turnover space for the installation mold, avoid interference of the installation mold during the turnover process, and affect the smooth turnover of the installation mold. The connection design of the separation rod, because the adhesion force between the guide plate and the installation mold and the pushing force required to push the installation mold are not large, can only use the elastic force of the spring to meet the separation action between the guide plate and the installation mold. The design of the movable connection of the separation rod on the connecting plate can make the separation rod move away from the installation mold when abutting against the guide plate, without causing movement interference between the separation rod and the guide plate. That is, when the installation mold is pushed over by the turnover push rod, the separation rod can abut against the guide plate without complete staggered design, so as to reduce the distance between the separation rod and the turnover push rod, and reduce the movement distance of the moving table and the overall occupied space.

[0015] As an improvement of the present application, the upper end of the moving abutting block is provided with a receiving end face for receiving the installed mold after turning over, the side of the installed mold away from the turning over push rod is also provided with a turning over block, when turning over the installed mold, the turning over push rod pushes the top end of the installed mold, the turning over block abuts with the low end of the installed mold to make the installed mold turn over, the receiving end face is coplanar with the top end face of the turning over block, one side of the moving abutting block is provided with a sixth driving cylinder for pushing the installed mold on the receiving end face away from the receiving end face to the material rack, when the sixth driving cylinder pushes the installed mold away from the receiving end face, the receiving end face is lower than the lower end face of the turning over block, the side of the turning over block close to the receiving end is arc-shaped, under the pushing of the sixth driving cylinder, the installed mold moves along the outer arc surface of the turning over block to the material rack, through the improvement, the design of the receiving end face can make the moving abutting block more stably receive the installed mold after turning over, which is convenient for subsequent processing of the installed mold, and the design of the turning over block can solve the problem that the turning over falling points of the installed molds are not uniform after turning over of the installed mold is completed, and there is some deviation, and through the arc-shaped design of the turning over block, the installed mold can be moved along the arc-shaped surface, and then the purpose of uniform moving track of the installed mold after turning over is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is the overall structure schematic diagram of the present application.

[0017] Figure 2 is the directional forming assembly structure schematic diagram of the present application.

[0018] Figure 3 is the mold cavity cross section structure schematic diagram of the present application when the mold is closed.

[0019] Figure 4 is the mold cavity amplification structure schematic diagram of the present application. Figure 3

[0020] Figure 5 is the upper mold and lower mold side surface connection structure schematic diagram of the present application when the mold is closed.

[0021] Figure 6 is the abutting block connection structure schematic diagram of the present application.

[0022] Figure 7 is the first abutting seat and second abutting seat connection structure schematic diagram of the present application.

[0023] Figure 8 is the step-by-step mold loading assembly structure schematic diagram of the present application.

[0024] Figure 9 is the first support groove and second support groove horizontal plane setting structure schematic diagram of the present application.​

[0025] Figure 10 Is the first support groove of the application and the second support groove different level setting structure schematic diagram.

[0026] Figure 11 Is the installation mold structure schematic diagram of the application.

[0027] Figure 12 Is the needle structure schematic diagram of the application.

[0028] Figure 13 Is the lead screw transmission assembly connection structure schematic diagram of the application.

[0029] Figure 14 Is the guide plate and installation mold section view connection structure schematic diagram of the application.

[0030] Figure 15 Is the mold turnover assembly structure schematic diagram of the application.

[0031] Figure 16 Is the installation mold and guide plate separation structure schematic diagram of the application.

[0032] Figure 17 Is the turnover push rod to the installation mold when turning over structure schematic diagram of the application.

[0033] Figure 18 Is the mold turnover assembly another view structure schematic diagram of the application.

[0034] Figure 19 Is the turnover push rod and separation rod connection structure schematic diagram of the application.

[0035] Figure 20 Is the mold feeding assembly structure schematic diagram of the application.

[0036] As shown in the figure: 1, the upper die, 2, the lower die, 2.1, the clamping guide column, 3, the mold cavity, 3.1, the lower mold cavity, 4, the abutting block, 5, the directional magnetic pole, 6, the installation mold, 6.1, the installation hole group, 7, the moving seat, 8, the conveying belt, 9, the feeding funnel, 10, the abutting spring, 10.1, the guide connecting block, 10.2, the guide column, 10.3, the guide fitting hole, 10.4, the shaft sleeve, 11, the moving plate, 12, the first abutting seat, 13, the second abutting seat, 13.1, the material collecting groove, 14, the push rod, 15, the first support frame, 15.1, the first support groove, 15.2, the connecting strip, 16, the second support frame, 16.1, the second support groove, 16.2, the connecting frame, 17, the first drive air cylinder, 18, the second drive air cylinder, 19, the jacking rod, 19.1, the jacking rod connecting plate, 20, the third drive air cylinder, 21, the moving table, 21.1, the abutting plate, 21.2, the moving abutting block, 21.3, the fourth drive air cylinder, 21.4, the receiving end face, 21.5, the overturning step, 22, the screw transmission assembly, 22.1, the motor, 22.2, the screw connecting seat, 22.3, the moving block, 22.4, the detection sheet, 22.5, the detection probe, 23, the guide plate, 23.1, the guide hole, 23.2, the separation hole, 24, the lifting plate, 24.1, the seventh drive air cylinder, 25, the overturning push rod, 25.1, the fifth drive air cylinder, 26, the connecting plate, 27, the separation rod, 27.1, the baffle, 27.2, the spring, 28, the overturning block, 29, the sixth drive air cylinder, 30, the material rack, 31, the mold feeding assembly, 31.1, the feeding air cylinder. DETAILED DESCRIPTION

[0037] The embodiments of the present application will be further described below with reference to the drawings.

[0038] As Figures 1-2As shown in the figure, a neodymium iron boron small cylinder forming device is characterized in that: it comprises a directional forming assembly for directional forming of neodymium iron boron powder magnetic poles into neodymium iron boron small cylinders, a hierarchical mold assembly for uniformly spaced array of neodymium iron boron small cylinders, and a mold turnover assembly for arranging and transporting neodymium iron boron small cylinders, neodymium iron boron powder sequentially passes through the directional forming assembly, the hierarchical mold assembly and the mold turnover assembly to complete the forming and transportation of the neodymium iron boron small cylinder, facilitating subsequent isostatic pressing of the neodymium iron boron small cylinder; the directional forming assembly comprises an upper die 1 and a lower die 2, the upper die 1 is movably connected above the lower die 2 along the longitudinal direction, when the upper die 1 and the lower die 2 are closed, a mold cavity 3 for forming multiple neodymium iron boron small cylinders from the neodymium iron boron powder is formed between the upper die 1 and the lower die 2, both ends of the mold cavity 3 are provided with abutting blocks 4 for forming the end of the neodymium iron boron small cylinder, directional magnetic poles 5 are also provided on both sides of the mold cavity 3, one end of the directional magnetic pole 5 is S pole, and the other end of the directional magnetic pole 5 is N pole; the hierarchical mold assembly installs the neodymium iron boron small cylinder with directional magnetic poles into the mounting mold 6 in a uniformly spaced array along the horizontal direction; the mold turnover assembly turns over the mounting mold 6 with the neodymium iron boron small cylinder, so that the neodymium iron boron small cylinder is placed vertically, and the mounting mold 6 is arranged and transported.

[0039] As shown in the figure, Figures 2-4 The lower die 2 is fixedly connected to the moving seat 7, the moving seat 7 is arranged on the conveying belt 8 for movement, the directional forming assembly further comprises a feeding hopper 9, the lower die 2 moves to the directional magnetic pole 5 station after receiving the neodymium iron boron powder at the feeding hopper 9 station, the mold cavity 3 comprises a lower mold cavity 3.1 for forming the lower half of the neodymium iron boron small cylinder, the lower end surface of the abutting block 4 is lower than the lower end of the lower mold cavity 3.1, and the upper end surface of the abutting block 4 is higher than the upper end of the lower mold cavity 3.1.

[0040] As shown in the figure, Figure 5 Two mold closing guide columns 2.1 are arranged at both ends of the lower die 2 along the conveying direction of the conveying belt 8, and the upper die 1 is provided with mold closing guide holes matched with the mold closing guide columns 2.1, through the design of the mold closing guide columns 2.1 and the mold closing guide holes, the mold closing between the upper die 1 and the lower die 2 is more prepared, thereby ensuring the high quality of the neodymium iron boron small cylinder formed in the mold cavity 3.

[0041] As shown in the figure, Figure 6As shown, the abutting block 4 away from the lower die 2 side is provided with abutting spring 10, abutting spring 10 for ensuring the abutting block 4 and the lower die 2 abutting state, abutting spring 10 sleeve on an axial column, for ensuring the stability of the axial force of abutting spring 10, abutting block 4 away from the lower die 2 side is also provided with guide connecting block 10.1, one end of the guide connecting block 10.1 is fixedly provided, the other end of the guide connecting block 10.1 is provided with guide column 10.2, the abutting block 4 is provided with guide hole 10.3 movably connected with the guide column 10.2, for ensuring the abutting block 4 along the axial direction of the guide column 10.2 movement, because the abutting block 4 is long strip, in order to ensure the stability of abutting, one end of the abutting block 4 along the length direction is provided with abutting spring 10 and guide connecting block 10.1, wherein in order to ensure the stability of the movement between the guide connecting block 10.1 and the abutting block 4, and also avoid the abutting block 4 wear and tear, the guide hole 10.3 is fixedly connected with a shaft sleeve 10.4, the shaft sleeve 10.4 and the guide column 10.2 are guided and matched with each other.

[0042] As Figure 1 , Figure 2 , Figure 7 As shown, the upper hopper 9 is horizontally moved in the vertical direction of the conveying belt 8 moving direction, the upper hopper 9 is fixedly connected to a moving plate 11, the moving plate 11 is movably connected to a first abutting seat 12, when the first abutting seat 12 abuts the lower die 2, the upper hopper 9 moves to the upper side of the lower die 2 for feeding, the first abutting seat 12 is arranged on one side of the lower die 2, and the other side of the lower die 2 is provided with a second abutting seat 13 abutting therewith, the upper surface of the second abutting seat 13 is provided with a material collecting groove 13.1 for collecting excess Nd-Fe-B powder, and the bottom surface of the material collecting groove 13.1 is coplanar with the bottom surface of the moving plate 11. The first abutting seat 12, the second abutting seat 13 and the moving plate 11 are respectively connected with a pneumatic cylinder for driving the movement of the first abutting seat 12, the second abutting seat 13 and the moving plate 11.

[0043] As Figure 1 , Figures 8-10As shown, the staged mold loading assembly is arranged at the end of the conveying belt 8, and the staged mold loading assembly comprises a support frame for supporting the Nd-Fe-B small cylinders and a push rod 14 for pushing the Nd-Fe-B small cylinders from the lower mold 2 to the support frame, the support frame comprises a first support frame 15 and a second support frame 16, the first support frame 15 comprises a plurality of first support grooves 15.1 for supporting the Nd-Fe-B small cylinders, and the plurality of first support grooves 15.1 are arranged at intervals, the second support frame 16 comprises a plurality of second support grooves 16.1 for supporting the Nd-Fe-B small cylinders, and the plurality of second support grooves 16.1 are arranged at intervals, the bottom end of the first support frame 15 is connected with a first driving cylinder 17 driven longitudinally, the bottom end of the second support frame 16 is connected with a second driving cylinder 18 driven longitudinally, one second support groove 16.1 is arranged between two adjacent first support grooves 15.1, in the initial position, the first support grooves 15.1 and the second support grooves 16.1 are arranged in the same horizontal plane for receiving the Nd-Fe-B small cylinders moved from the lower mold 2, under the driving of the first driving cylinder 17 and the second driving cylinder 18, the first support grooves 15.1 and the second support grooves 16.1 are in different horizontal planes, and the distance between the first support grooves 15.1 and the adjacent second support grooves 16.1, the distance between the first support grooves 15.1 and the adjacent first support grooves 15.1, and the distance between the second support grooves 16.1 and the adjacent second support grooves 16.1 are equal. The first driving cylinder 17 is connected with a plurality of first support frames 15 through a connecting strip 15.2, the second driving cylinder 18 is connected with a plurality of second support frames 16 through a connecting frame 16.2, the two ends of the second support frame 16 are fixedly connected to the two side edges of the connecting frame 16.2, the connecting strip 15.2 is movably connected to the axis of the connecting frame 16.2, and the second support frame 16 is provided with an avoiding groove avoiding the moving track of the connecting strip 15.2. In order to ensure the stability of the movement of the connecting frame 16.2, one second driving cylinder 18 is connected to each of the other two side edges of the connecting frame 16.2.

[0044] As Figure 8 , Figures 10-12As shown, the mounting mold 6 is arranged on the side of the support frame away from the conveying belt 8, and the mounting mold 6 is provided with a mounting hole group 6.1, which includes a plurality of mounting holes corresponding to the first support groove 15.1 and the second support groove 16.1 one by one. The other side of the support frame is provided with a top rod 19 close to the side of the conveying belt 8. The top rod 19 pushes the neodymium-iron-boron small cylinders on the first support groove 15.1 and the neodymium-iron-boron small cylinders on the second support groove 16.1 into the corresponding mounting holes at the same time under the action of the third driving cylinder 20. The mounting mold 6 is provided with three groups of mounting hole groups 6.1, which are evenly arrayed along the longitudinal direction. The spacing between the two adjacent mounting hole groups 6.1 is the same as the spacing between the two rows of mounting holes in the same mounting hole group 6.1. In order to ensure the consistency of the driving top rod 19, all the top rods 19 are arranged on the same top rod connecting plate 19.1, and then the top rod connecting plate 19.1 is driven to move by the third driving cylinder 20 to drive the top rod 19 to push the neodymium-iron-boron small cylinders into the mounting holes. In order to ensure the stability of the driving top rod 19, the top rod connecting plate 19.1 is connected to the moving guide rail on the side away from the top rod 19.

[0045] As shown in Figure 13 , 14 , the mounting mold 6 is placed on a longitudinally moving moving table 21. The moving table 21 is movably connected to a lead screw transmission assembly 22 driven by a motor 22.1. The lead screw transmission assembly 22 includes a longitudinally arranged lead screw connecting seat 22.2 and a moving block 22.3 moving along the lead screw connecting seat 22.2. The moving table 21 is fixedly connected to the side of the moving block 22.3 away from the lead screw connecting seat 22.2. The moving table 21 is provided with a detection piece 22.4 close to the lead screw connecting seat 22.2. The upper and lower ends of the lead screw connecting seat 22.2 are each provided with a detection probe 22.5. When the detection piece 22.4 reaches the detection probe 22.5 at the upper end or the lower end, the moving table 21 stops moving.

[0046] As shown in Figure 8 , Figure 13 , Figure 14As shown, the mobile platform 21 is provided with a guide plate 23, and the guide plate 23 is provided with guide holes 23.1 corresponding to the mounting holes, and the guide plate 23 is arranged between the mounting die 6 and the ejector rod 19 to guide the Nd-Fe-B small cylinder to smoothly enter the mounting hole, the diameter of the guide hole 23.1 is enlarged along the direction from the mounting die 6 to the ejector rod 19, the minimum diameter of the guide hole 23.1 is the same as the diameter of the mounting hole, and the guide plate 23 is arranged between the mounting die 6 and the ejector rod 19 to guide the Nd-Fe-B small cylinder to smoothly enter the mounting hole. The side of the mobile platform 21 close to the lead screw transmission assembly 22 is provided with an abutting plate 21.1, and one side of the mounting die 6 abuts against the abutting plate 21.1, and the mobile platform 21 is further provided with a mobile abutting block 21.2, and the mobile abutting block 21.2 is movably connected to the side of the mobile platform 21 away from the ejector rod 19 through a fourth driving cylinder 21.3, and when the mounting die 6 installs the Nd-Fe-B small cylinder, the fourth driving cylinder 21.3 drives the mobile abutting block 21.2 to clamp the mounting die 6 between the guide plate 23 and the mobile abutting block 21.2.

[0047] During the process of pushing the Nd-Fe-B small cylinder into the mounting hole, the driving positions of the first driving cylinder 17, the second driving cylinder 18 and the third driving cylinder 20 are fixed, and only the receiving height of the mounting die 6 needs to be adjusted. After the installation of the Nd-Fe-B small cylinder in all the mounting hole groups 6.1 of one mounting die 6 is completed, the first driving cylinder 17, the second driving cylinder 18 and the third driving cylinder 20 need to be driven to reciprocate three times.

[0048] As shown in Figure 1 , Figures 15-17 , the die overturning assembly includes a lifting plate 24 arranged on the mobile platform 21 and a overturning push rod 25 for overturning the mounting die 6, the mounting die 6 is arranged on the lifting plate 24, the lifting plate 24 moves along the longitudinal direction, the lifting plate 24 is drivingly connected to a seventh driving cylinder 24.1, and is used to make the mounting die 6 move up and down when the mobile platform 21 remains stationary, the overturning push rod 25 is arranged on the side of the mounting die 6 away from the mobile abutting block 21.2, and the overturning push rod 25 pushes the upper end of the mounting die 6 under the action of a fifth driving cylinder 25.1, when the mounting die 6 needs to be overturned, the lifting plate 24 rises to form an overturning step 21.5 with the mobile abutting block 21.2, the overturning step 21.5 is used to reduce the vibration amplitude of overturning, and through overturning of the mounting die 6, the Nd-Fe-B small cylinder is overturned from horizontal placement to vertical placement, and the opening end of the mounting hole faces upward.

[0049] The fifth driving cylinder 25.1 is drivingly connected with the turnover push rod 25 through the connecting plate 26, and a plurality of separation rods 27 for separating the guide plate 23 from the installation mold 6 are further arranged on the connecting plate 26. The guide plate 23 is provided with a separation hole 23.2 for the separation rod 27 to pass through the guide plate 23 so that the separation rod 27 abuts against the installation mold 6. The plurality of separation rods 27 are arranged along the circumference of the installation mold 6. One end of the separation rod 27 is used to abut against the installation mold 6, and the other end of the separation rod 27 is movably connected to the connecting plate 26. The middle part of the separation rod 27 is provided with a baffle 27.1, and a spring 27.2 is arranged between the baffle 27.1 and the connecting plate 26. The longitudinal movement track of the separation rod 27 is arranged in a staggered manner with the guide hole 23.1.

[0050] As shown in Figure 19 , a limiting bolt limitingly connected with the connecting plate 26 is arranged at the other end of the separation rod 27, so as to prevent the separation rod 27 from being separated from the connecting plate 26 under the action of the spring 27.2. When the separation rod 27 abuts against the guide plate 23, the separation rod 27 can move in the axial direction away from the guide plate 23, so as to avoid interference between the separation rod 27 and the guide plate 23.

[0051] As shown in Figures 15-18 , the upper end of the moving abutting block 21.2 is provided with a receiving end face 21.4 for receiving the installation mold 6 after being turned over. The installation mold 6 is further provided with a turnover block 28 away from the turnover push rod 25. When the installation mold 6 is turned over, the turnover push rod 25 pushes the top end of the installation mold 6, and the turnover block 28 abuts against the low end of the installation mold 6, so that the installation mold 6 is turned over. The receiving end face 21.4 is coplanar with the top end face of the turnover block 28. The side of the moving abutting block 21.2 is provided with a sixth driving cylinder 29 for pushing the installation mold 6 on the receiving end face 21.4 away from the receiving end face 21.4 to the material rack 30. When the sixth driving cylinder 29 pushes the installation mold 6 away from the receiving end face 21.4, the receiving end face 21.4 is lower than the lower end face of the turnover block 28. The side of the turnover block 28 close to the receiving end is arc-shaped. Under the pushing of the sixth driving cylinder 29, the installation mold 6 moves along the arc-shaped surface of the turnover block 28 to the material rack 30.

[0052] Before the structure design of the turnover block 28, the turnover push rod 25 can cooperate with the turnover step 21.5 to complete the turnover of the installation mold 6. However, the position of the installation mold 6 after the turnover is changeable, and the uniformity is poor. Therefore, the arc-shaped design of the turnover block 28 is needed to unify the movement track of the installation mold 6 after the installation mold 6 moves along the turnover block 28, so as to facilitate the subsequent automatic production.

[0053] The flipping block 28 can also be set along the extension line of the flipping step 21.5, so that the flipping block 28 and the flipping step 21.5 have no overlapping area. After the installation mold 6 is flipped using the flipping step 21.5, the installation mold 6 can be moved from the flipping step 21.5 to the flipping block 28 by the sixth drive cylinder 29.

[0054] like Figure 1 , Figure 20 As shown, after the installation and flipping of a small NdFeB cylinder in an installation mold 6 is completed, the installation mold 6 is moved to the receiving position of the installation mold 6 by the screw drive assembly 22. A mold feeding assembly 31 is provided on the side of the moving platform 21 away from the abutment plate 21.1. The installation mold 6 is transported to the moving platform 21 by the feeding cylinder 31.1 on the mold feeding assembly 31, and the installation mold 6 abuts against the abutment plate 21.1.

[0055] The above description only illustrates the preferred embodiments of the present invention and should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All modifications made within the scope of the independent claims of this invention are also within the scope of protection of this invention.

Claims

1. A molding device for neodymium iron boron small cylinders, characterized in that: It includes an orientation forming component for orienting NdFeB powder into NdFeB small cylinders, a stepped molding component for uniformly spacing the NdFeB small cylinders, and a mold flipping component for sorting and transporting the NdFeB small cylinders. The NdFeB powder passes through the orientation forming component, the stepped molding component, and the mold flipping component in sequence to complete the forming and transport of NdFeB small cylinders, which facilitates the subsequent isostatic pressing process of the NdFeB small cylinders. The orientation forming assembly includes an upper mold (1) and a lower mold (2). The upper mold (1) is movably connected above the lower mold (2) along the longitudinal direction. When the upper mold (1) and the lower mold (2) are closed, a mold cavity (3) is formed between the upper mold (1) and the lower mold (2) for forming multiple NdFeB small cylinders from NdFeB powder. The mold cavity (3) is provided with abutment blocks (4) at both ends. The abutment blocks (4) are used to form the ends of the NdFeB small cylinders. Orientation magnetic poles (5) are also provided on both sides of the mold cavity (3). One orientation magnetic pole (5) is an S pole, and the other orientation magnetic pole (5) is an N pole. The stepped mounting assembly installs the magnetically oriented NdFeB small cylinders into the mounting mold (6) in a uniformly spaced array along the horizontal direction. The stepped mounting assembly is located at the end of the conveyor belt (8). The stepped mounting assembly includes a support frame for supporting the NdFeB small cylinders and a push rod (14) for pushing the NdFeB small cylinders from the lower mold (2) onto the support frame. The support frame includes a first support frame (15) and a second support frame (16). The first support frame (15) includes a plurality of first support grooves (15.1) for supporting the NdFeB small cylinders, which are spaced apart. The second support frame (16) includes a plurality of second support grooves (16.1) for supporting the NdFeB small cylinders, which are spaced apart. The bottom end of the first support frame (15) is connected to a longitudinally driven first drive cylinder. (17) The bottom end of the second support frame (16) is connected to a longitudinally driven second drive cylinder (18). A second support groove (16.1) is provided between two adjacent first support grooves (15.1). In the initial position, the first support groove (15.1) and the second support groove (16.1) are set at the same horizontal plane to receive the neodymium iron boron small cylinders moved from the lower mold (2). Under the drive of the first drive cylinder (17) and the second drive cylinder (18), the first support groove (15.1) and the second support groove (16.1) are on different horizontal planes, and the distance between the first support groove (15.1) and the adjacent second support groove (16.1), the distance between the first support groove (15.1) and the adjacent first support groove (15.1), and the distance between the second support groove (16.1) and the adjacent second support groove (16.1) are all equal. The mounting mold (6) is located on the side of the support frame away from the conveyor belt (8). The mounting mold (6) is provided with a mounting hole group (6.1). The mounting hole group (6.1) includes multiple mounting holes that correspond one-to-one with the first support groove (15.1) and the second support groove (16.1). On the other side of the support frame, near the conveyor belt (8), a push rod (19) is provided. Under the action of the third drive cylinder (20), the push rod (19) connects the neodymium iron boron small cylinder on the first support groove (15.1) with the second support groove (16.1). The neodymium iron boron cylinders on .1) are simultaneously pushed into the corresponding mounting holes. The mounting mold (6) is provided with multiple sets of mounting hole groups (6.1). The multiple sets of mounting hole groups (6.1) are evenly arrayed along the longitudinal direction. The spacing between two adjacent sets of mounting hole groups (6.1) is the same as the spacing between two rows of mounting holes in the same mounting hole group (6.1). The mounting mold (6) is placed on a longitudinally moving moving stage (21). The moving stage (21) is movably connected to a screw drive assembly (22) driven by a motor. The movable stage (21) is provided with a guide plate (23), and the guide plate (23) is provided with guide holes (23.1) corresponding to the mounting holes. The diameter of the guide holes (23.1) increases along the mounting mold (6) towards the push rod (19). The minimum diameter of the guide holes (23.1) is the same as the diameter of the mounting holes. The guide plate (23) is located between the mounting mold (6) and the push rod (19) to guide the NdFeB small cylinders to smoothly enter the mounting holes. The movable stage (21) is provided with a stop on the side near the lead screw drive assembly (22). The mounting mold (6) is abutted against the mounting plate (21.1) on one side. The moving platform (21) is also provided with a moving abutment block (21.2). The moving abutment block (21.2) is moved and connected to the side of the moving platform (21) away from the push rod (19) by the fourth driving cylinder (21.3). When the mounting mold (6) is installing the neodymium iron boron small cylinder, the fourth driving cylinder (21.3) drives the moving abutment block (21.2) to clamp the mounting mold (6) between the guide plate (23) and the moving abutment block (21.2). The mold flipping assembly flips the mounting mold (6) containing NdFeB small cylinders, making the NdFeB small cylinders stand vertically, and arranges and transports the mounting mold (6). The mold flipping assembly includes a lifting plate (24) on a moving platform (21) and a flipping push rod (25) for flipping the mounting mold (6). The mounting mold (6) is mounted on the lifting plate (24), which moves along the longitudinal direction to keep the moving platform (21) stationary. Under the condition that the installation mold (6) is moved up and down, the flipping push rod (25) is located on the side of the installation mold (6) away from the moving abutment block (21.2). The flipping push rod (25) pushes the upper end of the installation mold (6) under the action of the fifth drive cylinder (25.1). When the installation mold (6) needs to be flipped, the lifting plate (24) rises and forms a flipping step (21.5) with the moving abutment block (21.2). The flipping step (21.5) is used to reduce the vibration amplitude of the flipping.

2. The molding equipment for NdFeB small cylinders according to claim 1, characterized in that: The lower mold (2) is fixedly connected to the movable seat (7), which is located on the conveyor belt (8) for movement. The orientation forming assembly also includes a feeding funnel (9). After the lower mold (2) receives NdFeB powder at the feeding funnel (9) station, it moves to the orientation magnetic pole (5) station. The mold cavity (3) includes a lower mold cavity (3.1) for forming the lower half of the NdFeB small cylinder. The lower end face of the abutting block (4) is lower than the lower end of the lower mold cavity (2), and the upper end face of the abutting block (4) is higher than the upper end of the lower mold cavity (2). An abutting spring (10) is provided on the side of the abutting block (4) away from the lower mold (2). The abutting spring (10) is used to ensure that the abutting block (4) and the lower mold (2) are in abutting state.

3. The molding equipment for NdFeB small cylinders according to claim 2, characterized in that: At the feeding hopper (9) station, the feeding hopper (9) moves horizontally in the direction perpendicular to the moving direction of the conveyor belt (8). The feeding hopper (9) is fixedly connected to a moving plate (11). The moving plate (11) is movably connected to a first abutment seat (12). When the first abutment seat (12) abuts against the lower mold (2), the feeding hopper (9) moves to the top of the lower mold (2) to feed the material. The first abutment seat (12) is located on one side of the lower mold (2). The other side of the lower mold (2) is provided with a second abutment seat (13) that abuts against it. The upper surface of the second abutment seat (13) is provided with a collection trough (13.1) for collecting excess NdFeB powder. The bottom surface of the collection trough (13.1) is coplanar with the bottom surface of the moving plate (11).

4. The molding equipment for NdFeB small cylinders according to claim 1, characterized in that: The fifth drive cylinder (25.1) and the flip push rod (25) are driven to connect through a connecting plate (26). The connecting plate (26) is also provided with multiple separation rods (27) for separating the guide plate (23) from the installation mold (6). The guide plate (23) is provided with separation holes (23.2) for the separation rods (27) to pass through the guide plate (23) and abut against the installation mold (6). The multiple separation rods (27) are arranged along the circumference of the installation mold (6). One end of the separation rod (27) is used to abut against the installation mold (6), and the other end of the separation rod (27) is limited to move and connected to the connecting plate (26). A baffle (27.1) is provided in the middle of the separation rod (27). A spring (27.2) is provided between the baffle (27.1) and the connecting plate (26). The longitudinal movement trajectory of the separation rod (27) is offset from the guide hole (23.1).

5. The molding equipment for NdFeB small cylinders according to claim 4, characterized in that: The upper end of the movable abutment block (21.2) is provided with a receiving end face (21.4), which is used to receive the flipped installation mold (6). The side of the installation mold (6) away from the flipping push rod (25) is also provided with a flipping block (28). When the installation mold (6) is flipped, the flipping push rod (25) pushes the top of the installation mold (6), and the flipping block (28) abuts against the bottom of the installation mold (6), so that the installation mold (6) is flipped. The receiving end face (21.4) and the top end face of the flipping block (28) are coplanar. The movable abutment block (21.2) is provided with a receiving end face (21.4). 2) A sixth driving cylinder (29) is provided on one side. The sixth driving cylinder (29) is used to push the installation mold (6) on the receiving end face (21.4) away from the receiving end face (21.4) and onto the material rack (30). When the sixth driving cylinder (29) pushes the installation mold (6) away from the receiving end face (21.4), the receiving end face (21.4) is lower than the lower end face of the flipping block (28). The side of the flipping block (28) near the receiving end is outwardly arc-shaped. Under the push of the sixth driving cylinder (29), the installation mold (6) moves onto the material rack (30) along the outward arc of the flipping block (28).

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