Method for forming a neodymium-iron-boron cylinder

Abstract

The application discloses a forming method of a neodymium iron boron small cylinder, which comprises the following steps: a conveyor belt drives a lower mold to move to a feeding hopper station, the feeding hopper moves to the upper side of the lower mold, and neodymium iron boron powder is conveyed to the lower mold; the lower mold moves to the lower side of an upper mold, the upper mold and the lower mold are closed after a directional magnetic pole is opened, and a neodymium iron boron small cylinder is shaped; the lower mold moves to a push rod station, the push rod pushes the neodymium iron boron small cylinder to move to a support frame; first support grooves and second support grooves are divided into stages; the neodymium iron boron small cylinder on the support frame is installed into an installation mold; the installation mold is turned over; and the installation mold after turning over is pushed to a material rack. The application provides a forming method of a neodymium iron boron small cylinder, which unifies the magnetic direction of neodymium iron boron powder, guarantees the magnetic field uniformity of the neodymium iron boron powder during forming, and reduces the magnetic field strength difference of the neodymium iron boron small cylinder after magnetization.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of Nd-Fe-B material processing, in particular to a forming method of Nd-Fe-B small cylinder. BACKGROUND

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

[0003] The traditional forming method is to simply fill the Nd-Fe-B powder into the corresponding mold, and then perform isostatic pressing, but this process ignores the small amount of magnetism of the Nd-Fe-B powder which has not been completely eliminated. During the forming of the Nd-Fe-B powder, the magnetism of the same direction is superimposed, and the magnetism of the opposite direction is cancelled out. Therefore, after the Nd-Fe-B powder is formed, although it is produced from the same batch of material, there is a slight difference in the magnetic field strength between each Nd-Fe-B magnet after magnetization. SUMMARY

[0004] The technical problem to be solved by the present application is to provide a forming method of Nd-Fe-B small cylinder which unifies the magnetic direction of Nd-Fe-B powder, ensures the magnetic field uniformity during the forming of Nd-Fe-B powder, and reduces the difference in magnetic field strength of the Nd-Fe-B small cylinder after magnetization.

[0005] The technical solution adopted by the present application to solve the above problems is a forming method of Nd-Fe-B small cylinder, comprising the following steps:

[0006] S1: The lower mold is moved to the upper hopper station by the conveyor belt, the first abutment seat and the second abutment seat abut the installed mold for clamping, the upper hopper is moved above the lower mold, and the Nd-Fe-B powder is conveyed to the lower mold;

[0007] S2: The lower mold is moved to the lower side of the upper mold by the conveyor belt, the directional magnetic pole is turned on, the upper mold and the lower mold are closed, the two ends of the mold cavity are respectively abutted with the abutment blocks, and the Nd-Fe-B small cylinder is shaped;

[0008] S3: The upper mold and the lower mold are separated, the lower mold is moved to the push rod station by the conveyor belt, and the push rod pushes the Nd-Fe-B small cylinder on the lower mold to move to the support frame;

[0009] S4: The lower mold is moved away from the push rod station by the conveyor belt;

[0010] S5: the first support groove and the second support groove on the support frame for placing the Nd-Fe-B small cylinders are divided into stages, 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;

[0011] S6: the installation mold moves to the height for receiving the Nd-Fe-B small cylinders, and the Nd-Fe-B small cylinders on the support frame are installed into the installation mold under the action of the ejector rod;

[0012] S7: the installation mold moves upward to the overturning height, and the installation mold is overturned under the action of the overturning push rod, so that the Nd-Fe-B small cylinders are changed from horizontal placement to vertical placement, and the opening of the installation hole on the installation mold for installing the Nd-Fe-B small cylinders faces upward;

[0013] S8: the installation mold after overturning is pushed to the material rack, and the installation mold is arranged, so as to facilitate subsequent isostatic pressing.

[0014] Compared with the prior art, the application has the advantages that: in the step S2, the directional magnetic pole is used, the directional magnetic pole is turned on before the upper mold and the lower mold are closed, the Nd-Fe-B powder is rotated or deviated according to the magnetic property carried by itself, so that the uniformity of the magnetic field direction of all the Nd-Fe-B powders is ensured, and then the upper mold and the lower mold are closed, and the abutting blocks at both ends of the mold cavity are used to extrude the Nd-Fe-B powder, so that the difference in the magnetic field strength of the same batch of molded Nd-Fe-B small cylinders after sintering and magnetization is smaller, the magnetic field precision of the Nd-Fe-B small cylinders is higher, and the automatic molding and installation of the Nd-Fe-B powder into the Nd-Fe-B small cylinders are easily realized.

[0015] As an improvement of the application, in the step S1, a step S1.1 of leveling the Nd-Fe-B powder in the feeding hopper is further provided. Through the improvement, in order to ensure the sufficiency of feeding and avoid unqualified Nd-Fe-B small cylinders in subsequent molding, the Nd-Fe-B powder for feeding is often excessive, and the excessive Nd-Fe-B powder will cause insufficient closing of the mold, so it is necessary to separate the excessive Nd-Fe-B powder, and therefore the Nd-Fe-B powder on the lower mold is leveled after excessive feeding.

[0016] As an improvement of the application, in the step S2, when the lower mold moves away from between the first abutting seat and the second abutting seat, the two ends of the lower mold immediately abut against the two abutting blocks, and the lower mold moves against the abutting blocks. Through the improvement, the Nd-Fe-B powder just received from the feeding hopper is still in a relatively loose state, and if the two ends of the lower mold are not limited during the movement, the Nd-Fe-B powder is prone to leakage, so the lower mold needs to be kept moving against the abutting blocks.

[0017] As an improvement of the present application, the installation mold is provided with a mounting hole group, the mounting hole group includes a plurality of mounting holes corresponding to the first support groove and the second support groove one by one, and the installation of the neodymium iron boron small cylinder in one mounting hole group is completed through the step-by-step operation of the first support groove and the second support groove. The installation mold is provided with a plurality of mounting hole groups, and the receiving height of the installation mold is adjusted according to the number of mounting hole groups. The operation steps of S3-S6 are repeated for multiple times to complete the installation of the neodymium iron boron small cylinder in the mounting hole groups on the installation mold. Through the improvement, the number of neodymium iron boron small cylinders that can be installed in the installation mold is increased, the manufacturing of the installation mold is reduced, and the processing efficiency of the isostatic pressing is further improved.

[0018] As an improvement of the present application, the installation mold is provided with a mounting hole group, the mounting hole group includes a plurality of mounting holes corresponding to the first support groove and the second support groove one by one, and the installation of the neodymium iron boron small cylinder in one mounting hole group is completed through the step-by-step operation of the first support groove and the second support groove. The installation mold is provided with a plurality of mounting hole groups, and the receiving height of the installation mold is adjusted according to the number of mounting hole groups. The operation steps of S3-S6 are repeated for multiple times to complete the installation of the neodymium iron boron small cylinder in the mounting hole groups on the installation mold. Through the improvement, the number of neodymium iron boron small cylinders that can be installed in the installation mold is increased, the manufacturing of the installation mold is reduced, and the processing efficiency of the isostatic pressing is further improved.

[0019] As an improvement of the present application, the installation mold is provided with a moving abutting block away from one side of the guide plate, which is used to keep the installation mold in abutting state with the guide plate when installing the Nd-Fe-B small cylinder, the installation mold is arranged on a moving table, and the installation mold moves vertically through the moving table, the moving table is provided with a lifting table which can move along the vertical direction, and before step S7, step S7.02 is further provided, the lifting table is lifted, and a turnover step is formed between the lifting table and the moving abutting block, the turnover step and the turnover push rod act on a group of opposite angles of the installation mold respectively, through the improvement, after the Nd-Fe-B small cylinder is installed into the installation mold, one end face of the Nd-Fe-B small cylinder lacks support, so that the Nd-Fe-B small cylinder needs to be turned over from horizontal placement to vertical placement, so as to ensure that the unsintered Nd-Fe-B small cylinder will not be loose in the subsequent transportation process, and in the turnover process, the vibration of turnover, the too fast turnover speed or the too large turnover angle will also cause the Nd-Fe-B small cylinder to be loose, so it is necessary to avoid the case that the installation mold turns over too fast and too large, the turnover speed of the installation mold needs to be reduced or the turnover amplitude needs to be reduced, the turnover of the installation mold is realized by the turnover push rod, through the design of the turnover step, not only the turnover angle of the installation mold is reduced, the turnover amplitude of the installation mold is reduced, the acceleration time of the installation mold in the free turnover process is reduced, so that the instantaneous speed of the installation mold when contacting the turnover step is low, thereby reducing the vibration amplitude of the installation mold in the turnover process, and avoiding the case that the Nd-Fe-B small cylinder is loose in the turnover process, and the design that the turnover step and the turnover push rod act on a group of opposite angles of the installation mold respectively can make the installation mold more easily achieve the purpose of turnover.

[0020] As an improvement of the present application, after the installation mold turns over and leaves the moving table, step S9 is further provided, the moving table is lowered, and the installation mold is supported on the mold feeding assembly, through the improvement, the feeding of the installation mold is realized, and the rapid operation of automatic production is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic diagram of the present application.

[0022] Figure 2 It is a structure schematic diagram of the directional forming assembly of the present application.

[0023] Figure 3 It is a structure schematic diagram of the mold cavity section of the present application when the mold is closed.

[0024] Figure 4 It is a structure schematic diagram of the present application Figure 3 It is a structure schematic diagram of the present application

[0025] Figure 5Is the upper die and lower die side connection structure schematic diagram of the present application when closing mold.

[0026] Figure 6 Is the abutment block connection structure schematic diagram of the present application.

[0027] Figure 7 Is the first abutment seat and second abutment seat connection structure schematic diagram of the present application.

[0028] Figure 8 Is the sub-stage mold assembly structure schematic diagram of the present application.

[0029] Figure 9 Is the first support groove and second support groove with horizontal plane setting structure schematic diagram of the present application.

[0030] Figure 10 Is the first support groove and second support groove with horizontal plane setting structure schematic diagram of the present application.

[0031] Figure 11 Is the installation mold structure schematic diagram of the present application.

[0032] Figure 12 Is the thimble structure schematic diagram of the present application.

[0033] Figure 13 Is the lead screw transmission assembly connection structure schematic diagram of the present application.

[0034] Figure 14 Is the guide plate and installation mold section connection structure schematic diagram of the present application.

[0035] Figure 15 Is the mold turnover assembly structure schematic diagram of the present application.

[0036] Figure 16 Is the installation mold and guide plate separation structure schematic diagram of the present application.

[0037] Figure 17 Is the turnover push rod to turn over the installation mold structure schematic diagram of the present application.

[0038] Figure 18 Is the mold turnover assembly another view structure schematic diagram of the present application.

[0039] Figure 19 Is the turnover push rod and separation rod connection structure schematic diagram of the present application.

[0040] Figure 20 Is the mold feeding assembly structure schematic diagram of the present application.

[0041] 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

[0042] The embodiments of the present application will be further described below with reference to the drawings.

[0043] As Figures 1-2As shown, a neodymium iron boron small cylinder forming device, comprising a directional forming assembly for directional forming of neodymium iron boron powder magnetic poles into neodymium iron boron small cylinders, a staged mold loading assembly for uniformly spacing array of neodymium iron boron small cylinders, and a mold turnover assembly for arranging and transporting neodymium iron boron small cylinders, the neodymium iron boron powder sequentially passes through the directional forming assembly, the staged mold loading assembly and the mold turnover assembly to complete the forming and transportation of the neodymium iron boron small cylinder, facilitating subsequent isostatic pressing treatment 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 further provided on both sides of the mold cavity 3, the directional magnetic pole 5 at one end is an S pole, and the directional magnetic pole 5 at the other end is an N pole; the staged mold loading assembly uniformly and spacedly installs the neodymium iron boron small cylinder with directional magnetic poles into a mounting mold 6 along the horizontal direction; the mold turnover assembly turns over the mounting mold 6 with the neodymium iron boron small cylinder mounted therein, so that the neodymium iron boron small cylinder is placed vertically, and the mounting mold 6 is arranged and transported.

[0044] As shown in Figures 2-4 the lower die 2 is fixedly connected to a moving seat 7, the moving seat 7 is arranged on a conveyor 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.

[0045] As shown in 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 conveyor belt 8, and a mold closing guide hole is arranged on the upper die 1 and matched with the mold closing guide column 2.1, through the design of the mold closing guide column 2.1 and the mold closing guide hole, 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.

[0046] As shown in Figure 6As shown, the abutting block 4 away from the lower die 2 side is provided with abutting spring 10, the abutting spring 10 is used to ensure 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, the 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 arranged, 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 matching 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 wear of the abutting block 4, the guide matching hole 10.3 is fixedly connected with a shaft sleeve 10.4, and the shaft sleeve 10.4 and the guide column 10.2 are movably connected.

[0047] As Figure 1 , Figure 2 , Figure 7 As shown, the feeding hopper 9 station, the feeding hopper 9 moves in the vertical direction of the conveying belt 8 moving direction, the feeding hopper 9 is fixedly connected to a moving plate 11, the moving plate 11 is movably connected to a first abutting seat 12, the first abutting seat 12 abuts the lower die 2, the feeding 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, 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, the bottom surface of the material collecting groove 13.1 is coplanar with the bottom surface of the moving plate 11, through the design of the material collecting groove 13.1, the excess Nd-Fe-B powder can be pushed into the material collecting groove 13.1, so as to facilitate the secondary use of the Nd-Fe-B powder in the material collecting groove 13.1, and avoid waste of excess Nd-Fe-B powder. 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.

[0048] 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 air cylinder 17 driven longitudinally, the bottom end of the second support frame 16 is connected with a second driving air 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 air cylinder 17 and the second driving air 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 air cylinder 17 is connected with a plurality of first support frames 15 through a connecting strip 15.2, the second driving air 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 air cylinder 18 is connected to each of the other two side edges of the connecting frame 16.2. When the Nd-Fe-B small cylinders are placed into the corresponding mounting holes, the distance between the adjacent Nd-Fe-B small cylinders is equal, and the extrusion force between the Nd-Fe-B small cylinders is also equal during the isostatic pressing process, so as to ensure the consistency of the force of the Nd-Fe-B small cylinders during the isostatic pressing process and ensure the high quality of the isostatic pressing process of the Nd-Fe-B small cylinders. The process can realize the rapid feeding process of the Nd-Fe-B small cylinders and realize the uniform and interval arrangement of the Nd-Fe-B small cylinders, so as to ensure the high quality of the isostatic pressing process and meet the automatic production demand more easily, reduce the preparation time of the isostatic pressing process, and improve the processing efficiency of the Nd-Fe-B small cylinders.

[0049] 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 is driven by the third driving cylinder 20 to simultaneously push 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. 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 by the third driving cylinder 20 to move 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.

[0050] 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 side of the moving table 21 close to the lead screw connecting seat 22.2 is provided with a detection piece 22.4. 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.

[0051] As shown in Figure 8 , Figure 13 , Figure 14 , the moving table 21 is provided with a guide plate 23, and the guide plate 23 is provided with a guide hole 23.1 corresponding to the mounting hole one by one. The guide plate 23 is arranged between the mounting mold 6 and the top rod 19 to guide the neodymium-iron-boron small cylinders to smoothly enter the mounting hole. The diameter of the guide hole 23.1 expands along the direction of the mounting mold 6 to the top rod 19. The minimum diameter of the guide hole 23.1 is the same as the diameter of the mounting hole. The guide plate 23 is arranged between the mounting mold 6 and the top rod 19 to guide the neodymium-iron-boron small cylinders to smoothly enter the mounting hole.

[0052] The mobile platform 21 is provided with an abutting plate 21.1 on the side close to the screw rod transmission assembly 22, and the installation mold 6 is abutted with the abutting plate 21.1. The mobile platform 21 is further provided with a mobile abutting block 21.2, which is movably connected to the side of the mobile platform 21 away from the ejector pin 19 by a fourth driving cylinder 21.3. When the installation mold 6 is used to install the Nd-Fe-B small cylinder, the fourth driving cylinder 21.3 drives the mobile abutting block 21.2 to clamp the installation mold 6 between the guide plate 23 and the mobile abutting block 21.2. When the installation mold 6 is moved to the mobile platform 21, the abutting plate 21.1 and the mobile abutting block 21.2 abut the installation mold 6 in two mutually perpendicular directions, thereby ensuring the positioning of the installation mold 6 on the mobile platform 21 and the accurate alignment of the guide hole 23.1 and the installation hole.

[0053] During the pushing of the Nd-Fe-B small cylinder into the installation 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 height of the installation mold 6 needs to be adjusted. The installation of the Nd-Fe-B small cylinder in all the installation hole groups 6.1 of the installation mold 6 needs to be completed three times by driving the first driving cylinder 17, the second driving cylinder 18 and the third driving cylinder 20 to reciprocate.

[0054] As shown in Figure 1 , Figures 15-17 , the mold overturning assembly includes a lifting plate 24 provided on the mobile platform 21 and a overturning push rod 25 for overturning the installation mold 6. The installation mold 6 is provided on the lifting plate 24, and the lifting plate 24 moves along the longitudinal direction and is drivingly connected to a seventh driving cylinder 24.1 for moving the installation mold 6 up and down while the mobile platform 21 remains stationary. The overturning push rod 25 is provided on the side of the installation mold 6 away from the mobile abutting block 21.2, and the overturning push rod 25 pushes the upper end of the installation mold 6 under the action of a fifth driving cylinder 25.1. When the installation mold 6 needs to be overturned, the lifting plate 24 is lifted to form an overturning step 21.5 with the mobile abutting block 21.2, which is used to reduce the vibration amplitude of the overturning. By overturning the installation mold 6, the Nd-Fe-B small cylinder is overturned from a horizontal position to a vertical position, and the opening end of the installation hole faces upward.

[0055] The fifth drive 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, 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, 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, and the separation rod 27 is connected in design. Because the adhesion force between the guide plate 23 and the installation mold 6 and the pushing force required to push the installation mold 6 are not large, the elastic force of the spring 27.2 can meet the separation action between the guide plate 23 and the installation mold 6, and the design that the separation rod 27 is movably connected to the connecting plate 26 can make the separation rod 27 move away from the installation mold when abutting against the guide plate 23, without causing movement interference between the separation rod 27 and the guide plate 23, that is, the separation rod 27 can abut against the guide plate 23 when the turnover push rod 25 pushes the installation mold 6, without the need for complete staggered design, so as to reduce the distance between the separation rod 27 and the turnover push rod 25, and reduce the movement distance of the moving table 21 and the overall occupied space.

[0056] As shown in Figure 19 the other end of the separation rod 27 is provided with a limiting bolt limitingly connected with the connecting plate 26, so as to prevent the separation rod 27 from being separated from the connecting plate 26 under the action of the spring 27.2, and when the separation rod 27 abuts against the guide plate 23, the separation rod 27 can move away from the guide plate 23 along the axial direction, avoiding interference between the separation rod 27 and the guide plate 23.

[0057] As shown in Figures 15-18As shown, 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 turning over, the side of the installation mold 6 away from the turning over push rod 25 is also provided with a turning over block 28, when turning over the installation mold 6, the turning over push rod 25 pushes the top end of the installation mold 6, and the turning over block 28 abuts against the low end of the installation mold 6 to make the installation mold 6 turn over, the receiving end face 21.4 is coplanar with the top end face of the turning over block 28, one 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 turning over block 28, the side of the turning over 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 turning over block 28 to the material rack 30, the design of the receiving end face 21.4 can make the moving abutting block 21.2 more stably receive the installation mold 6 after turning over, which is convenient for subsequent processing of the installation mold 6, and the design of the turning over block 28 can solve the problem that the turning over landing positions of the installation molds 6 are not uniform after turning over of the installation mold 6 is completed, and there is some deviation, and through the arc-shaped design of the turning over block 28, the installation mold 6 can be moved along the arc-shaped surface, and then the purpose of uniform moving track of the installation mold 6 after turning over is achieved.

[0058] Before the structure design of the turning over block 28, the turning over push rod 25 can cooperate with the turning over step 21.5 to complete the turning over work of the installation mold 6, but the position of the installation mold 6 after the turning over process is completed is changeable, and the uniformity is poor, so the arc-shaped design of the turning over block 28 is needed to uniform the moving track of the installation mold 6 after the installation mold 6 moves along the turning over block 28, which is convenient for subsequent automatic production.

[0059] The turning over block 28 can also be arranged along the extension direction of the turning over step 21.5, so that the turning over block 28 has no turning over overlapping area with the turning over step 21.5, and after the installation mold 6 is turned over by the turning over step 21.5, the installation mold 6 can be moved from the turning over step 21.5 to the turning over block 28 by the sixth driving cylinder 29.

[0060] As Figure 1 , Figure 20As shown, after the installation and turning of the Nd-Fe-B small cylinder in the installation mold 6 are completed, the installation mold 6 is moved to the receiving station of the installation mold 6 by the screw rod transmission assembly 22. The mold loading assembly 31 is arranged on the side of the moving table 21 away from the abutting plate 21.1. The installation mold 6 is conveyed to the moving table 21 by the loading cylinder 31.1 of the mold loading assembly 31, and the installation mold 6 is abutted with the abutting plate 21.1.

[0061] As shown, Figure 1 A forming method of a Nd-Fe-B small cylinder, for a forming equipment of a Nd-Fe-B small cylinder, the steps are as follows:

[0062] S1: The conveyor belt 8 drives the lower mold 2 to move to the loading funnel 9 station, the first abutting seat 12 and the second abutting seat 13 clamp the installation mold 6, the loading funnel 9 moves above the lower mold 2, the Nd-Fe-B powder is conveyed to the lower mold 2, and the loading funnel 9 flattens the Nd-Fe-B powder;

[0063] S2: The conveyor belt 8 drives the lower mold 2 to move directly below the upper mold 1, the directional magnetic pole 5 is opened, the upper mold 1 and the lower mold 2 are closed, the two ends of the mold cavity 3 are respectively abutted with the abutting blocks 4, and the Nd-Fe-B small cylinder is shaped;

[0064] S3: The upper mold 1 and the lower mold 2 are opened, the conveyor belt 8 drives the lower mold 2 to move to the push rod 14 station, and the push rod 14 pushes the Nd-Fe-B small cylinder on the lower mold 2 to move to the support frame;

[0065] S4: The conveyor belt 8 drives the lower mold 2 to move away from the push rod 14 station;

[0066] S5: The first support groove 15.1 and the second support groove 16.1 for placing the Nd-Fe-B small cylinder on the support frame are divided into stages, 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 equal;

[0067] S6: The installation mold 6 moves to the height of receiving the Nd-Fe-B small cylinder, and the Nd-Fe-B small cylinder on the support frame is installed into the installation mold 6 under the action of the top rod 19;

[0068] The operation steps of S3-S6 are repeated three times;

[0069] S7.01: The installation mold 6 is pushed to separate the installation mold 6 from the guide plate 23;

[0070] S7.02: The lifting plate 24 rises, the lifting plate 24 and the moving abutting block 4 form a turning step 21.5, and the turning step 21.5 and the turning push rod 25 respectively act on a group of diagonal corners of the installation mold 6.

[0071] S7: The installation mold 6 moves upward to the overturning height, and under the action of the overturning push rod 25, the installation mold 6 is overturned, so that the neodymium iron boron small cylinder is changed from horizontal placement to vertical placement, and the opening of the installation hole on the installation mold 6 for installing the neodymium iron boron small cylinder faces upward;

[0072] S8: The installation mold 6 that has completed the overturning is pushed to the material rack 30, and the installation mold 6 is arranged, so as to facilitate subsequent isostatic pressing treatment.

[0073] S9: The moving table 21 descends and supports the installation mold 6 from the mold feeding assembly 31.

[0074] When the lower mold 2 moves away from between the first abutting seat 12 and the second abutting seat 13, the two ends of the lower mold 2 immediately abut against the two abutting blocks 4, and the lower mold 2 moves while abutting against the abutting blocks 4.

[0075] The above only describes the best embodiment of the present application, but cannot be understood as a limitation on the claims. The present application is not limited to the above embodiment, and the specific structure allows changes. Any changes made within the protection scope of the independent claim of the present application are within the protection scope of the present application.

Claims

1. A method for forming small neodymium iron boron cylinders, characterized in that, Includes the following steps: S1: The conveyor belt (8) drives the lower mold (2) to the feeding funnel (9) station. The first abutment (12) and the second abutment (13) clamp the installation mold (6). The feeding funnel (9) moves above the lower mold (2) and conveys the neodymium iron boron powder to the lower mold (2). S2: The conveyor belt (8) drives the lower mold (2) to move directly below the upper mold (1). After the directional magnetic pole (5) is turned on, the upper mold (1) and the lower mold (2) are closed. The two ends of the mold cavity (3) are respectively abutted by abutting blocks (4) to shape the neodymium iron boron small cylinder. S3: The upper mold (1) and the lower mold (2) are separated. The conveyor belt (8) drives the lower mold (2) to move to the push rod (14) station. The push rod (14) pushes the neodymium iron boron small cylinder on the lower mold (2) to move towards the support frame. S4: The conveyor belt (8) drives the lower mold (2) to move away from the push rod (14) station; S5: The first support groove (15.1) and the second support groove (16.1) on the support frame for placing small NdFeB cylinders are stepped so that 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 equal. S6: The installation mold (6) is moved to the height of the NdFeB small cylinder. Under the action of the push rod (19), the NdFeB small cylinder on the support frame is installed into the installation mold (6); The mounting mold (6) is provided with a guide plate (23) on the side near the top rod (19). The guide plate (23) is provided with a guide hole (23.1) for facilitating the installation of NdFeB small cylinders into the mounting hole. When the NdFeB small cylinders are installed into the mounting hole, the mounting mold (6) and the guide plate (23) are in abutting state, including step S7.01: push the mounting mold (6) to separate the mounting mold (6) from the guide plate (23); The mounting mold (6) is provided with a movable abutment block (21.2) on the side away from the guide plate (23). The movable abutment block (21.2) is used to keep the mounting mold (6) and the guide plate (23) in abutment state when installing NdFeB small cylinders. The mounting mold (6) is set on a movable platform (21). The mounting mold (6) moves vertically through the movable platform (21). The movable platform (21) is provided with a lifting plate (24) that can move vertically. The process includes step S7.02: the lifting plate (24) rises, and a flipping step (21.5) is formed between the lifting plate (24) and the movable abutment block (21.2). The flipping step (21.5) and the flipping push rod (25) act on a set of diagonals of the mounting mold (6). S7: The mounting mold (6) moves upward to the flipping height. Under the action of the flipping push rod (25), the mounting mold (6) flips, so that the NdFeB small cylinder changes from horizontal to vertical placement, and the opening of the mounting hole on the mounting mold (6) for mounting the NdFeB small cylinder faces upward. S8: Push the completed installation mold (6) to the material rack (30) and tidy up the installation mold (6) to facilitate subsequent isostatic pressing.

2. The method for forming a neodymium iron boron small cylinder according to claim 1, characterized in that: In step S1, there is also a step, S1.1: Use the feeding funnel (9) to smooth the neodymium iron boron powder.

3. The method for forming a neodymium iron boron small cylinder according to claim 1, characterized in that: In step S2, when the lower mold (2) moves away from the first abutment seat (12) and the second abutment seat (13), the two ends of the lower mold (2) immediately abut against the two abutment blocks (4), and the lower mold (2) moves against the abutment blocks (4).

4. The method for forming a neodymium iron boron small cylinder according to claim 1, characterized in that: The mounting mold (6) is provided with 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). The first support groove (15.1) and the second support groove (16.1) are operated in stages to complete the installation of NdFeB small cylinders in a mounting hole group (6.1). The mounting mold (6) is provided with multiple sets of mounting hole groups (6.1). The bearing height of the mounting mold (6) is adjusted according to the number of mounting hole groups (6.1). The operation steps S3-S6 are repeated multiple times to complete the installation of NdFeB small cylinders in multiple mounting hole groups (6.1) on the mounting mold (6).

5. The method for forming a neodymium iron boron small cylinder according to claim 1, characterized in that: After the installation mold (6) is flipped away from the moving table (21), there are further steps. S9: The moving platform (21) descends and receives the mold (6) from the mold loading assembly (31).

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