Magnetic ring outer diameter shaping apparatus

Abstract

The application relates to a magnetic ring outer diameter shaping device, characterized by comprising a workbench, a plurality of upper jacks which are arranged at intervals and can move up and down are arranged on the workbench, a shaping seat is arranged below the upper jack, the shaping seat is provided with a shaping hole which is coaxially arranged with the upper jack and penetrates up and down, and a through cavity for storing cooling liquid is arranged on the periphery of the shaping hole in the shaping seat. The application has the characteristics that after the outer wall of the magnetic ring workpiece is shaped as a whole, the outer wall of the magnetic ring workpiece can be cooled and shaped as a whole synchronously, the instantaneity of the magnetic ring workpiece outer diameter shaping is realized, the shaping efficiency is improved, and the shaping quality of the magnetic ring workpiece can be improved.

Description

Technical Field

[0001] This invention relates to a magnetic ring outer diameter shaping device, belonging to the technical field of magnetic ring processing. Background Technology

[0002] The general process for bonding NdFeB magnets involves uniformly mixing fine magnetic powder with a binder to form a rheological material, filling the mold cavity with the shape of the part into a blank using a pressing machine, and then curing it in a curing oven to form a magnet with a certain strength. Covering the surface with an anti-corrosion coating can achieve the function of use in different environments.

[0003] One of the key technologies in this process is shaping the product after the anti-corrosion coating is applied. During manufacturing, due to factors such as uniformity of pressing density, powder shrinkage, and thermal expansion and contraction, dimensional deviations are unavoidable. For example, the inner diameter of cylindrical magnetic rings may shrink, while the outer diameter may increase. Some magnetic rings are injection molded into components, requiring consideration of dynamic balance, thus necessitating high machining precision. Furthermore, some magnetic rings are assembled into motors after magnetization, making assembly dimensions and the roundness of the product extremely critical. For batches of products with large outer diameters after manufacturing, shaping the outer diameter is necessary to ensure that all supplied products meet the technical requirements of customer drawings and facilitate customer assembly.

[0004] Chinese patent application CN109175005A discloses a mechanism for shaping the inner and outer diameters of round parts, including a mechanism base, a worktable, and a mechanism fixing plate. The worktable is provided with a linear guide, a shaping mechanism, and front and rear cylinders. The shaping mechanism includes a linear guide connecting plate, a sliding plate limiting plate, a sliding plate, a sliding cover plate, a pair of outer diameter correction blocks, and an outer diameter clamping cylinder. The sliding plate limiting plate is provided with a shaping positioning sleeve. The sliding plate is provided with a first, second, and third U-shaped groove in sequence along the left and right direction. The shaping positioning sleeve is placed in the second U-shaped groove. Arc-shaped correction parts are formed on the inner surfaces of the pair of outer diameter correction blocks, and a cam roller is provided on each pair of outer diameter correction blocks. The two cam rollers are respectively placed in the first and third U-shaped grooves. The mechanism fixing plate is fixed with upper and lower cylinders, and the piston rods of the upper and lower cylinders are fixed with pressure heads.

[0005] Before shaping, magnetic ring products need to be softened in an oven and cooled and shaped immediately after shaping. However, the above-mentioned round inner and outer diameter shaping mechanism cannot cool and shape immediately after shaping. At the same time, the shaping structure of the round inner and outer diameter shaping mechanism is not suitable for shaping softened magnets, which will cause the softened magnets to deform and be damaged, making the magnets unusable. Summary of the Invention

[0006] The purpose of this invention is to provide a magnetic ring outer diameter shaping device that solves the problems of existing technologies, such as the inability to cool and solidify the shape after shaping and the easy damage to the magnets. Furthermore, to improve shaping efficiency and save costs, the shaping device is designed with comprehensive considerations regarding applicability, adjustability, multi-cavity shaping capabilities, and reduced labor intensity.

[0007] The above-mentioned technical objective of this invention is mainly achieved through the following technical solution: a magnetic ring outer diameter shaping device, characterized in that: it includes a worktable, on which a plurality of spaced and vertically movable upper push rods are provided, and a shaping seat is provided below the upper push rods. The shaping seat has a shaping hole coaxially arranged with the upper push rods and penetrating vertically, and a cavity for storing coolant is provided inside the shaping seat corresponding to the periphery of the shaping hole; the above-mentioned shaping seat and shaping hole can accommodate the magnetic ring workpiece, and the magnetic ring can be shaped through the shaping hole. The outer diameter shaping of the magnetic ring workpiece involves an upper push rod that pushes the magnetic ring workpiece into the shaping hole of the shaping seat for shaping. The through cavity allows the magnetic ring workpiece entering the shaping hole to be cooled and shaped by the coolant in the through cavity around the shaping hole. This allows the outer wall of the magnetic ring workpiece to be shaped and cooled simultaneously after entering the shaping hole, achieving real-time outer diameter shaping, improving shaping efficiency, and ensuring the shaping quality of the magnetic ring workpiece.

[0008] Preferably, the cavities of two adjacent shaping seats are connected by a bellows, and the cavities of the shaping seats at the beginning and end are provided with external pipes. The bellows are provided to facilitate the connection of each cavity, and together with the external pipes of the cavities of the shaping seats at the beginning and end, each cavity can be connected to an external coolant delivery device to facilitate the circulation of coolant, so as to ensure the heat transfer of coolant and maintain the cooling state of coolant.

[0009] Preferably, the workbench is provided with a vertical plate, and the side wall of the vertical plate is provided with a lower bracket to support the bottom of the shaping seat and an upper bracket located at the top of the shaping seat to fix the shaping seat; the upper bracket and the lower bracket are both suspended and fixed on the vertical plate, so that the shaping seat can be suspended and fixed on the lower bracket through the support of the lower bracket, and the upper bracket and the lower bracket cooperate to realize the limiting and fixing of the shaping seat, so that the shaping seat is kept in a horizontal state and suspended and fixed on the vertical plate, which facilitates the shaping work.

[0010] Preferably, the lower end of the upper push rod is provided with a first boss that mates with the inner ring of the magnetic ring workpiece, and the inner edge of the top of the shaping hole of the shaping seat is provided with a first rounded corner; the first rounded corner is used to guide the bottom end of the magnetic ring workpiece and assist the magnetic ring workpiece in entering the shaping hole, while the first boss can mate with the inner diameter of the shaping workpiece, so that the upper push rod can push the top of the magnetic ring workpiece, so that the magnetic ring workpiece enters the shaping hole.

[0011] Preferably, the outer diameter of the upper push rod is larger than the inner diameter of the magnetic ring workpiece, and the minimum distance between the lower end face of the first boss and the top surface of the shaping seat is not less than the axial length of the magnetic ring workpiece. The above-mentioned structure setting that the outer diameter of the upper push rod is larger than the inner diameter of the magnetic ring workpiece allows the upper push rod to abut against the upper end face of the magnetic ring workpiece, and the structure setting that the minimum distance between the lower end face of the first boss and the top surface of the shaping seat is not less than the axial length of the magnetic ring workpiece allows the magnetic ring workpiece to be placed from the side between the upper push rod and the shaping seat and positioned, increasing the clearance space.

[0012] Preferably, the shaping seat has a lower push rod coaxially arranged with the upper push rod below it. The upper end of the lower push rod has a second boss that mates with the inner ring of the magnetic ring workpiece. The inner edge of the bottom end of the shaping hole of the shaping seat has a second rounded corner. The outer diameter of the lower push rod is larger than the inner diameter of the magnetic ring workpiece. The lower push rod is provided so that after the magnetic ring workpiece is shaped and cooled, the magnetic ring in the shaping hole can be pushed upward by the lower push rod to achieve unloading. The second boss can mate with the inner diameter of the shaped workpiece, so that the lower push rod can push the bottom end of the magnetic ring workpiece, so that the magnetic ring workpiece is disengaged from the shaping hole from bottom to top.

[0013] Preferably, the workbench is provided with a base plate, and a first connecting plate located at the bottom of the lower push rod is provided on the top surface of the base plate. The first connecting plate is provided with a first fixing plate and a second fixing plate separated to the left and right. A first annular groove is provided on the bottom side wall of the lower push rod. A first arc-shaped locking block that mates with one side of the first annular groove is provided on one side of the first fixing plate, and a second arc-shaped locking block that mates with the other side of the first annular groove is provided on one side of the second fixing plate. The structure of the first fixing plate and the second fixing plate is designed to facilitate the fixing of the bottom end of the lower push rod by mates with the first annular groove and the second arc-shaped locking block, thereby ensuring the structural stability of the lower push rod. It also allows for the detachable connection of the lower push rod, facilitating easy replacement and maintenance of the lower push rod.

[0014] Preferably, the bottom of the worktable is provided with a first driving cylinder for driving the base plate to move up and down. The output shaft of the first driving cylinder is connected to the base plate. The top surface of the worktable is provided with a first guide rod that penetrates the base plate vertically. The top end of the first guide rod is provided with a first limiting protrusion. The first driving cylinder is provided to control the lower push rod to move up and down through the base plate, so that the lower push rod can push the magnetic ring workpiece out of the shaping hole. The first guide rod can guide the movement of the base plate to ensure stable vertical movement of the base plate and prevent the base plate from deviating during movement. The first limiting protrusion can limit the movement of the base plate and prevent the base plate from dislodging from the first guide rod.

[0015] Preferably, the upper end of the vertical plate is provided with a top plate, the bottom surface of the top plate is provided with a movable plate, the upper push rod is provided at the bottom of the movable plate, the bottom of the movable plate is provided with a second connecting plate corresponding to a single upper push rod, the second connecting plate is provided with a third fixing plate and a fourth fixing plate separated to the left and right, the bottom side wall of the upper push rod is provided with a third annular groove, one side of the third fixing plate is provided with a third arc-shaped locking block that cooperates with one side of the third annular groove, and one side of the fourth fixing plate is provided with a fourth arc-shaped locking block that cooperates with the other side of the third annular groove; the structure of the above-mentioned third fixing plate and fourth fixing plate is designed so that the top end of the upper push rod can be fixed by the third arc-shaped locking block and the fourth arc-shaped locking block cooperating with the third annular groove and the fourth annular groove of the upper push rod, ensuring the structural stability of the upper push rod, and also enabling the upper push rod to be detachably connected, facilitating the replacement and maintenance of the upper push rod at any time.

[0016] Preferably, the top surface of the top plate is provided with a second driving cylinder for driving the movable plate to move up and down. The output shaft of the second driving cylinder passes downward through the top plate and connects to the movable plate. The bottom surface of the top plate is provided with a second guide rod that passes through the movable plate vertically. The top end of the second guide rod is provided with a second limiting protrusion. The above-mentioned second driving cylinder is provided to facilitate the control of the upper push rod to move up and down through the movable plate, so that the upper push rod can press the magnetic ring workpiece into the shaping hole for outer diameter shaping. The second guide rod can guide the movement of the movable plate to ensure stable vertical movement of the movable plate and prevent the movable plate from deviating during movement. The second limiting protrusion can limit the movement of the bottom plate to prevent the movable plate from dislodging from the second guide rod.

[0017] Therefore, this invention features simultaneous cooling and shaping of the outer wall of the magnetic ring workpiece after overall shaping, achieving real-time shaping of the outer diameter, improving shaping efficiency, and enhancing the shaping quality of the magnetic ring workpiece. As described in the tooling description, a one-out-three shaping arrangement is adopted. To save manpower and reduce labor intensity, upper and lower cylinders are used to coordinate the actions, realizing a cyclical action of product heating, pressing, shaping, ejection, and removal. This significantly reduces labor intensity and increases labor efficiency per unit time. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of the present invention; Figure 2 is a cross-sectional view of the structure in Figure 1; Figure 3 is an enlarged view of the structure at point A in Figure 2; Figure 4 is an enlarged view of the structure at point B in Figure 2; Figure 5 is an enlarged view of the structure at point C in Figure 2. Detailed Implementation

[0019] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0020] As shown in Figures 1-2, a magnetic ring outer diameter shaping device includes a worktable 1. The worktable 1 has multiple spaced and vertically movable upper push rods 5. A shaping seat 4 is provided below the upper push rods 5. The shaping seat 4 has a shaping hole 41 that is coaxial with the upper push rods 5 and extends vertically. The shaping seat 4 has a cavity 42 for storing coolant on the periphery corresponding to the shaping hole 41. The cavities 42 of two adjacent shaping seats 4 are connected by a bellows 44. The cavities 42 of the shaping seats 4 at the beginning and end are provided with external pipes 421. The worktable 1 has a vertical plate 13. The side wall of the vertical plate 13 has a lower support 131 that supports the bottom of the shaping seat 4 and an upper support 132 that is located at the top of the shaping seat 4 and fixes it.

[0021] The aforementioned upper push rod is located above the shaping seat, which is suspended and fixed to the vertical plate by an upper bracket and a lower bracket. Each upper push rod corresponds to a single shaping seat. The external pipe is connected to an external coolant delivery device. Before shaping the magnetic ring workpiece, the magnetic ring workpiece is placed in the upper half of the shaping hole of the shaping seat. Then, the upper push rod moves down, pushing the magnetic ring workpiece so that it moves downward into the shaping hole. The magnetic ring workpiece moves axially within the shaping hole until the outer wall of the magnetic ring workpiece is completely in contact with the inner wall of the shaping hole. When the magnetic ring workpiece is in the shaping hole, the coolant in the cavity on the shaping seat cools and shapes the magnetic ring workpiece. The cooled coolant is discharged through the bellows and one of the external pipes. The cooled coolant is sent to the cavity through another external pipe to achieve the circulation of the coolant.

[0022] As shown in Figure 2-3, the lower end of the upper push rod 5 is provided with a first boss 51 that mates with the inner ring of the magnetic ring workpiece. The inner edge of the top of the shaping hole 41 of the shaping seat 4 is provided with a first fillet 411. The outer diameter of the upper push rod 5 is larger than the inner diameter of the magnetic ring workpiece. The minimum distance between the lower end face of the first boss 51 and the top surface of the shaping seat 4 is not less than the axial length of the magnetic ring workpiece. The upper end of the vertical plate 13 is provided with a top plate 17. The bottom surface of the top plate 17 is provided with a movable plate 18. The upper push rod 5 is located at the bottom of the movable plate 18. The bottom of the movable plate 18 is provided with a second connecting plate 19 corresponding to a single upper push rod 5. The second connecting plate 19 is provided with a third fixing plate 191 and a fourth fixing plate 192 separated to the left and right. The bottom side wall of the upper push rod 5 is provided with a third annular groove 52. One side of the third fixing plate 191 is provided with a third arc-shaped locking block 193 that mates with one side of the third annular groove 52. The fourth fixing plate 192 is provided with a third arc-shaped locking block 193. One side is provided with a fourth arc-shaped locking block 194 that cooperates with the other side of the third annular slot 52. The top surface of the top plate 17 is provided with a second driving cylinder 171 for driving the movable plate 18 to move up and down. The output shaft of the second driving cylinder 171 passes down through the top plate 17 and connects to the movable plate 18. The bottom surface of the top plate 17 is provided with a second guide rod 172 that passes through the movable plate 18 from top to bottom. The top end of the second guide rod 172 is provided with a second limiting protrusion 173.

[0023] The first boss matches the inner diameter of the magnetic ring workpiece, fitting snugly against the inner wall of the magnetic ring workpiece. When fixing the magnetic ring workpiece, the bottom end of the magnetic ring workpiece is caught on the inner side of the first rounded corner. After fixing the magnetic ring workpiece in the shaping hole, the second drive cylinder is activated. The output rod of the second drive cylinder moves downward to push the movable plate. The movable plate moves along the axis along the second guide rod, causing the upper push rod to move downward, so that the upper push rod pushes the magnetic ring workpiece into the shaping hole. The upper push rod is fixed to the second connecting plate by the third and fourth fixing plates. The third and fourth arc-shaped locking blocks cooperate with each other to form a circular locking block, which is locked in the second annular slot to fix the upper push rod.

[0024] As shown in Figures 2, 4, and 5, a lower push rod 3 is provided below the shaping seat 4, coaxially arranged with the upper push rod 5. The upper end of the lower push rod 3 has a second boss 31 that mates with the inner ring of the magnetic ring workpiece. A second fillet 412 is provided at the inner edge of the bottom end of the shaping hole 41 of the shaping seat 4. The outer diameter of the lower push rod 3 is larger than the inner diameter of the magnetic ring workpiece. A base plate 11 is provided on the worktable 1. A first connecting plate 12 located at the bottom of the lower push rod 3 is provided on the top surface of the base plate 11. A first fixing plate 20 and a second fixing plate 14, separated to the left and right, are provided on the first connecting plate 12. A first annular groove 32 is provided on the bottom side wall of the lower push rod 3. A first arc-shaped locking block 201 mates with one side of the first annular groove 32 on one side of the first fixing plate 20. A second arc-shaped locking block 141 mates with the other side of the first annular groove 32 on one side of the second fixing plate 14. A drive base plate 11 is provided at the bottom of the worktable 1. The first drive cylinder 15 moves up and down. The output shaft of the first drive cylinder 15 is connected to the base plate 11. The top surface of the worktable 1 is provided with a first guide rod 16 that runs through the base plate 11 from top to bottom. The top end of the first guide rod 16 is provided with a first limiting protrusion 161.

[0025] The second boss matches the inner diameter of the magnetic ring workpiece, and can be locked onto the inner wall of the magnetic ring workpiece, abutting against the inner wall of the magnetic ring workpiece. After the upper push rod pushes the magnetic ring workpiece into the shaping hole for shaping and cooling, the magnetic ring workpiece is located in the shaping hole. The first drive cylinder is started, and the output rod of the first drive cylinder moves upward to push the base plate. The base plate moves along the axis along the first guide rod, driving the lower push rod to move upward, so that the lower push rod pushes the magnetic ring workpiece upward out of the shaping hole. The lower push rod is fixed to the first connecting plate through the first fixing plate and the second fixing plate. The first arc-shaped locking block and the second arc-shaped locking block cooperate with each other to form a circular locking block, which is locked in the first annular locking groove to fix the lower push rod.

Claims

1. A magnetic ring outer diameter shaping apparatus, characterized by: The system includes a worktable (1), on which are provided multiple spaced and movable upper push rods (5). Below each upper push rod (5) is a shaping seat (4). The shaping seat (4) has a shaping hole (41) coaxial with the upper push rods (5) and extending vertically. Inside the shaping seat (4), a cavity (42) for storing coolant is provided on the periphery corresponding to the shaping hole (41). Below the shaping seat (4) is a lower push rod (3) coaxial with the upper push rods (5). The upper end of the lower push rod (3) has a second boss (31) that mates with the inner ring of the magnetic ring workpiece. The inner edge of the bottom of the shaping hole (41) of the shaping seat (4) has a second fillet (412). The outer diameter of the lower push rod (3) is larger than the inner diameter of the magnetic ring workpiece. The worktable (1) is provided with a base plate (11). The top surface of the base plate (11) has a bottom part located at the bottom of the lower push rod (3). The first connecting plate (12) is provided with a first fixing plate (20) and a second fixing plate (14) that are separated to the left and right. The bottom side wall of the lower push rod (3) is provided with a first annular groove (32). One side of the first fixing plate (20) is provided with a first arc-shaped locking block (201) that cooperates with one side of the first annular groove (32). One side of the second fixing plate (14) is provided with a second arc-shaped locking block (141) that cooperates with the other side of the first annular groove (32). The bottom of the worktable (1) is provided with a first driving cylinder (15) for driving the base plate (11) to move up and down. The output shaft of the first driving cylinder (15) is connected to the base plate (11). The top surface of the worktable (1) is provided with a first guide rod (16) that penetrates the base plate (11) from top to bottom. The top end of the first guide rod (16) is provided with a first limiting protrusion (161).

2. The magnetic ring outer diameter sizing apparatus of claim 1, wherein: The cavities (42) of two adjacent shaping seats (4) are connected by a bellows (44), and the cavities (42) of the shaping seats (4) located at the beginning and end are provided with external pipes (421).

3. The magnetic ring outer diameter sizing apparatus of claim 1, wherein: The workbench (1) is provided with a vertical plate (13), and the side wall of the vertical plate (13) is provided with a lower bracket (131) supporting the bottom of the shaping seat (4) and an upper bracket (132) located at the top of the shaping seat (4) and fixing the shaping seat (4).

4. The magnetic ring outer diameter sizing apparatus of claim 1, wherein: The lower end of the upper push rod (5) is provided with a first boss (51) that mates with the inner ring of the magnetic ring workpiece, and the inner edge of the top of the shaping hole (41) of the shaping seat (4) is provided with a first rounded corner (411).

5. The magnetic ring outer diameter sizing apparatus of claim 4, wherein: The minimum distance between the lower end face of the first boss (51) and the top face of the shaping seat (4) is not less than the axial length of the magnetic ring workpiece.

6. The magnetic ring outer diameter sizing apparatus of claim 3, wherein: The upper end of the vertical plate (13) is provided with a top plate (17), and the bottom surface of the top plate (17) is provided with a movable plate (18). The upper push rod (5) is located at the bottom of the movable plate (18). The bottom of the movable plate (18) is provided with a second connecting plate (19) corresponding to a single upper push rod (5). The second connecting plate (19) is provided with a third fixing plate (191) and a fourth fixing plate (192) separated to the left and right. The bottom side wall of the upper push rod (5) is provided with a third annular groove (52). One side of the third fixing plate (191) is provided with a third arc-shaped locking block (193) that cooperates with one side of the third annular groove (52). One side of the fourth fixing plate (192) is provided with a fourth arc-shaped locking block (194) that cooperates with the other side of the third annular groove (52).

7. The magnetic ring outer diameter sizing apparatus of claim 6, wherein: The top surface of the top plate (17) is provided with a second driving cylinder (171) for driving the movable plate (18) to move up and down. The output shaft of the second driving cylinder (171) passes down through the top plate (17) and connects to the movable plate (18). The bottom surface of the top plate (17) is provided with a second guide rod (172) that passes through the movable plate (18) from top to bottom. The top end of the second guide rod (172) is provided with a second limiting protrusion (173).

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