Neodymium-iron-boron magnetic ring forming device

Abstract

The utility model discloses a neodymium iron boron magnet ring forming device. The neodymium iron boron magnetic ring forming device comprises an upper punch assembly, a female die assembly, a lower outer punch assembly and a lower inner punch assembly. The neodymium-iron-boron magnetic ring forming device can be used for pressing neodymium-iron-boron magnetic rings on one device, operation is simple, and production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a neodymium iron boron magnetic ring forming device. BACKGROUND

[0002] At present, the preparation process of hot deformation neodymium iron boron radiation magnetic ring mainly includes three processes of cold pressing, hot pressing and hot deformation extrusion of rapidly quenched neodymium iron boron powder, and different processes in the prior art usually need separate equipment and supporting molds, thereby causing the complexity of the process and increasing the production cost.

[0003] CN103042211A discloses a mold for radiation orientation sintering of neodymium iron boron magnetic ring and a manufacturing process thereof. The mold for sintering of neodymium iron boron magnetic ring includes a magnetic guiding and magnetic gathering ring, a female die, an upper punch assembly and a lower punch assembly. The female die is arranged in the magnetic guiding and magnetic gathering ring, the upper punch assembly and the lower punch assembly are arranged in the female die, and the pressing surfaces of the upper punch assembly and the lower punch assembly are oppositely arranged. The area of the pressing surfaces of the upper punch assembly and the lower punch assembly is the same as the cross-sectional area of the female die cavity. First, the area of the pressing surfaces of the upper punch assembly and the lower punch assembly of the mold for sintering of neodymium iron boron magnetic ring is the same as the cross-sectional area of the female die cavity, so that only equal-diameter cold-pressed blanks can be obtained, and the cold-pressed blanks need to be taken out and placed in an isostatic pressing device for pressing and sintering, which cannot be completed in one set of device. SUMMARY

[0004] Therefore, the utility model aims at providing a neodymium iron boron magnetic ring forming device which can press the neodymium iron boron magnetic ring on one device, is simple to operate and reduces the production cost.

[0005] The above-mentioned purpose is realized by the following technical scheme.

[0006] The utility model provides a neodymium iron boron magnetic ring forming device, including upper punch assembly, female die assembly, lower outer punch assembly and lower inner punch assembly, wherein,

[0007] The upper punch assembly includes an upper punch, an upper punch fixing part and an upper punch driving element, the upper punch fixing part is connected with the upper punch and the upper punch driving element respectively, and the upper punch driving element is arranged to drive the upper punch to move in the vertical direction.

[0008] The female die assembly includes a female die, the female die has a die cavity, the die cavity has a die cavity upper port and a die cavity lower port, and the upper punch is arranged to be capable of extending into the die cavity from the die cavity upper port.

[0009] The lower outer punch assembly comprises a lower outer punch, a lower outer punch fixing part and a lower outer punch driving element; the lower outer punch has a cavity; the lower outer punch fixing part is arranged below the female die assembly, and the lower outer punch fixing part is connected with the lower outer punch and the lower outer punch driving element respectively; the lower outer punch driving element is arranged to drive the lower outer punch to move in the vertical direction; the lower outer punch is arranged to be capable of extending into the mold cavity from the lower end of the mold cavity.

[0010] The lower inner punch assembly comprises a lower inner punch, a lower inner punch fixing part and a lower inner punch driving element; the lower inner punch fixing part is connected with the lower inner punch and the lower inner punch driving element respectively; at least a part of the lower inner punch is located in the cavity of the lower outer punch; the lower inner punch driving element is arranged to drive the lower inner punch to move in the cavity of the lower outer punch.

[0011] According to the neodymium-iron-boron magnetic ring forming device, preferably, the upper punch comprises an upper punch body and an upper punch connecting part; the upper end of the upper punch body is connected with the upper punch connecting part; the diameter of the upper punch body is the same as the diameter of the female die cavity.

[0012] According to the neodymium-iron-boron magnetic ring forming device, preferably, the lower outer punch comprises a lower outer punch body and a lower outer punch connecting part; the lower outer punch body has a cavity, and the lower outer punch connecting part is sleeved at the bottom of the lower outer punch body; the outer diameter of the lower outer punch body is the same as the diameter of the female die cavity.

[0013] According to the neodymium-iron-boron magnetic ring forming device, preferably, the lower inner punch comprises a lower inner punch body and a lower inner punch connecting part; the lower end of the lower inner punch body is connected with the lower inner punch connecting part; the diameter of the lower inner punch body is the same as the diameter of the cavity of the lower outer punch body.

[0014] According to the neodymium-iron-boron magnetic ring forming device, preferably, the upper punch fixing part comprises an upper punch gland and an upper cross beam; the upper punch is connected with the lower end surface of the upper cross beam through the upper punch gland; the upper punch driving element is connected with the upper end surface of the upper cross beam.

[0015] According to the neodymium-iron-boron magnetic ring forming device, preferably, the female die assembly further comprises a female die gland and a fixed cross beam; the female die is connected with the upper end surface of the fixed cross beam through the female die gland; a first through hole is formed in the fixed cross beam, the first through hole is communicated with the female die cavity, and the diameter of the first through hole is the same as the diameter of the mold cavity; the lower outer punch body is arranged in the first through hole of the fixed cross beam and extends into the female die cavity from the lower end of the female die cavity.

[0016] The lower outer punch fixing portion comprises a support structure, a first lower cross beam and a lower outer punch gland.

[0017] The support structure comprises a support table and a connecting pad; the lower outer punch is connected with the upper end surface of the support table through the lower outer punch gland; the connecting pad is provided with at least one; the upper end surface of the connecting pad is connected with the lower end surface of the support table; the lower end surface of the connecting pad is connected with the upper end surface of the first lower cross beam; a second through hole is formed in the support table, and the diameter of the second through hole is the same as the outer diameter of the lower inner punch body; the lower inner punch body is arranged in the second through hole of the support table and moves up and down in the cavity of the lower outer punch body.

[0018] The connecting pad comprises a first connecting pad and a second connecting pad; the upper end surface of the first connecting pad is connected with the lower end surface of the support table, the upper end surface of the second connecting pad is connected with the lower end surface of the first connecting pad, and the lower end surface of the second connecting pad is connected with the upper end surface of the first lower cross beam.

[0019] The lower inner punch fixing portion comprises a lower inner punch gland, a second lower cross beam and a connecting body; the first lower cross beam is provided with a third through hole, and a part of the connecting body is arranged in the third through hole; the lower inner punch is connected with the upper end surface of the connecting body through the lower inner punch gland, and the lower end surface of the connecting body is connected with the upper end surface of the second lower cross beam; the lower end surface of the second lower cross beam is connected with the lower inner punch driving element.

[0020] The upper punch driving element, the lower outer punch driving element and the lower inner punch driving element are independently provided as cylinders or hydraulic cylinders.

[0021] The neodymium iron boron magnetic ring forming device can press the neodymium iron boron magnetic ring on one equipment, is simple to operate, and reduces production cost. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the neodymium iron boron magnetic ring forming device.

[0023] Detailed description of the reference signs is as follows:

[0024] 1-upper punch assembly, 11-upper punch, 12-upper punch driving element, 13-upper cross beam, 14-upper punch gland;

[0025] 2-mold assembly, 21-mold, 22-fixed cross beam, 23-mold gland;

[0026] 3 - lower outer punch assembly, 31 - lower outer punch, 321 - support platform, 322 - first connecting pad, 323 - second connecting pad, 33 - first lower cross beam; 34 - lower outer punch gland, 35 - lower outer punch driving element;

[0027] 4 - lower inner punch assembly, 41 - lower inner punch, 42 - lower inner punch gland, 43 - second lower cross beam, 44 - connecting body, 45 - lower inner punch driving element. DETAILED DESCRIPTION

[0028] The utility model will be further explained in connection with specific embodiments, but the protection scope of the utility model is not limited to this.

[0029] The neodymium iron boron magnetic ring forming device of the utility model includes upper punch assembly, female die assembly, lower outer punch assembly and lower inner punch assembly. The neodymium iron boron magnetic ring forming device of the utility model is suitable for manufacturing neodymium iron boron magnetic ring.

[0030] <Upper punch assembly>

[0031] The upper punch assembly can include upper punch, upper punch fixing part and upper punch driving element; one end of the upper punch fixing part is connected with the upper punch, and the other end is connected with the upper punch driving element.

[0032] The upper punch fixing part can include upper cross beam and upper punch gland. The upper punch includes upper punch body and upper punch connecting part, and the upper end of the upper punch body is connected with the upper punch connecting part, which can be an integral forming structure. The upper punch is connected with the lower end surface of the upper cross beam through the upper punch gland. The upper punch driving element is connected with the upper end surface of the upper cross beam. The upper punch driving element is used to drive the upper punch and the upper cross beam to move in the vertical direction.

[0033] <Female die assembly>

[0034] The female die assembly can include female die, fixed cross beam and female die gland; the female die is connected with the upper end surface of the fixed cross beam through the female die gland.

[0035] The female die has a die cavity, a die cavity upper port and a die cavity lower port. The diameter of the upper punch body matches the diameter of the die cavity of the female die. The center line of the upper punch body coincides with the center line of the die cavity of the female die. The height of the upper punch body is greater than the height of the female die. The upper punch body can be inserted into the die cavity from the die cavity upper port to press the neodymium iron boron blank.

[0036] The fixed cross beam is provided with a first through hole, which is communicated with the die cavity, and the diameter of the first through hole is the same as that of the die cavity.

[0037] <Lower outer punch assembly>

[0038] The lower outer punch assembly comprises a lower outer punch, a lower outer punch fixing part and a lower outer punch driving element.

[0039] The lower outer punch can comprise a lower outer punch body and a lower outer punch connecting part. The lower outer punch body is provided with a cavity, and the lower outer punch connecting part is sleeved at the bottom of the lower outer punch body, and the two can be an integrated structure. The outer diameter of the lower outer punch body is the same as the diameter of the cavity of the female mold. The center line of the lower outer punch body coincides with the center line of the cavity of the female mold. The height of the lower outer punch body is greater than the height of the female mold. The lower outer punch body can be arranged in the first through hole of the fixed cross beam and extend into the female mold cavity from the lower end of the female mold cavity to move up and down in the female mold cavity, thereby pressing the Nd-Fe-B blank.

[0040] The lower outer punch fixing part comprises a support structure, a first lower cross beam and a lower outer punch gland.

[0041] The support structure can comprise a support table and a connecting pad. The lower outer punch is connected to the upper end surface of the support table through the lower outer punch gland; the lower end surface of the connecting pad is connected to the upper end surface of the first lower cross beam.

[0042] The connecting pad is provided with at least one, preferably two. According to a specific embodiment of the present application, the connecting pad comprises a first connecting pad and a second connecting pad. The upper end surface of the first connecting pad is connected to the lower end surface of the support table, the upper end surface of the second connecting pad is connected to the lower end surface of the first connecting pad, and the lower end surface of the second connecting pad is connected to the upper end surface of the first lower cross beam.

[0043] The lower outer punch driving element can be provided with multiple, preferably two, and the two lower outer punch driving elements are symmetrically arranged on the lower end surface of the first lower cross beam with the center line of the first lower cross beam as the axis. The lower outer punch driving element is arranged to drive the lower outer punch, the support structure and the first lower cross beam to move in the vertical direction.

[0044] <lower inner punch assembly>

[0045] The lower inner punch assembly comprises a lower inner punch, a lower inner punch fixing part and a lower inner punch driving element.

[0046] The lower inner punch comprises a lower inner punch body and a lower inner punch connecting part. The lower end of the lower inner punch body is connected to the lower inner punch connecting part, and the two are an integrated structure. The center line of the lower inner punch body coincides with the center line of the lower outer punch body. The height of the lower inner punch body is greater than the height of the lower outer punch body. The diameter of the lower inner punch body is the same as the cavity diameter of the lower outer punch body. A second through hole can be formed in the support table, and the diameter of the second through hole is the same as the diameter of the lower inner punch body. The lower inner punch body is arranged in the second through hole of the support table and moves up and down in the cavity of the lower outer punch body.

[0047] The lower inner punch fixing portion includes a lower inner punch gland, a second lower crossbeam, and a connector. The first lower crossbeam is provided with a third through-hole, through which a portion of the connector is inserted. The lower inner punch is connected to the upper end surface of the connector via the lower inner punch gland, and the lower end surface of the connector is connected to the upper end surface of the second lower crossbeam. The lower inner punch driving element is connected to the lower end surface of the second lower crossbeam.

[0048] There can be multiple connectors, preferably two, and more preferably three. According to a specific embodiment of the present invention, there are three connectors, namely a first connector, a second connector, and a third connector, and the three connectors are connected in sequence from top to bottom. The lower inner punch is connected to the upper end face of the first connector through the lower punch pressure cover, and the lower end face of the third connector is connected to the upper end face of the second lower crossbeam. The lower inner punch driving element is connected to the lower end face of the second lower crossbeam. The lower inner punch driving element is used to drive the lower inner punch, the second lower crossbeam and the connector to move in the vertical direction.

[0049] Example 1

[0050] like Figure 1 As shown, the NdFeB magnetic ring forming device of this embodiment includes an upper punch assembly 1, a female die assembly 2, a lower outer punch assembly 3 and a lower inner punch assembly 4.

[0051] The upper punch assembly 1 includes an upper punch 11 , an upper punch driving element 12 , an upper crossbeam 13 and an upper punch pressing cover 14 .

[0052] The upper punch 11 includes an upper punch body and an upper punch connecting portion. The upper end of the upper punch body is connected to the upper punch connecting portion, and the two are integrally formed. The upper punch 11 is connected to the lower end surface of the upper crossbeam 13 through the upper punch cover 14. The upper punch driving element 12 is connected to the upper end surface of the upper crossbeam 13. The upper punch driving element 12 drives the upper punch 12 and the upper crossbeam 13 to move in the vertical direction.

[0053] The female mold assembly 2 includes a female mold 21, a fixed crossbeam 22 and a female mold cover 23. The female mold 21 is connected to the upper end face of the fixed crossbeam 22 through the female mold cover 23. The female mold 21 has a mold cavity, and the mold cavity is provided with an upper mold cavity port and a lower mold cavity port. The diameter of the upper punch body matches the diameter of the female mold cavity. The center line of the upper punch body coincides with the center line of the female mold cavity. The height of the upper punch body is greater than the height of the female mold 21. The upper punch body extends into the mold cavity from the upper mold cavity port to press the NdFeB billet. A first through hole is provided on the fixed crossbeam 22, the first through hole is connected to the female mold cavity, and the diameter of the first through hole is the same as the diameter of the mold cavity.

[0054] The lower outer punch assembly 3 includes a lower outer punch 31 , a supporting structure, a first lower crossbeam 33 , a lower outer punch cover 34 and two lower outer punch driving elements 35 .

[0055] The lower outer punch 31 comprises a lower outer punch body and a lower outer punch connecting part. The lower outer punch body is provided with a cavity, and the lower outer punch connecting part is sleeved at the bottom of the lower outer punch body, and the two are an integral molding structure. The outer diameter of the lower outer punch body is the same as the diameter of the cavity of the female mold. The center line of the lower outer punch body coincides with the center line of the cavity of the female mold. The height of the lower outer punch body is greater than the height of the female mold. The lower outer punch body is arranged in the first through hole of the fixed cross beam 22 and extends into the lower end of the cavity, and can move in the vertical direction in the cavity of the female mold.

[0056] In order to facilitate the description, the lower inner punch assembly 4 will be described first, and then the support structure, the first lower cross beam 33, the lower outer punch gland 34 and the lower outer punch driving element 35 will be described.

[0057] The lower inner punch assembly 4 comprises a lower inner punch 41, a lower inner punch gland 42, a second lower cross beam 43, a connecting body 44 and a lower inner punch driving element 45.

[0058] The lower inner punch 41 comprises a lower inner punch body and a lower inner punch connecting part. The lower end of the lower inner punch body is connected with the lower inner punch connecting part, and the two are an integral molding structure. The center line of the lower inner punch body coincides with the center line of the lower outer punch body. The height of the lower inner punch body is greater than the height of the lower outer punch body. The diameter of the lower inner punch body is the same as the cavity diameter of the lower outer punch body. At least a part of the lower inner punch body is arranged in the cavity of the lower outer punch body, and can move in the vertical direction.

[0059] The connecting body 44 comprises a first connecting body, a second connecting body and a third connecting body, which are connected in order from top to bottom. The lower inner punch 41 is connected with the upper end face of the first connecting body through the lower inner punch gland 42, and the lower end face of the third connecting body is connected with the upper end face of the second lower cross beam 43. The lower inner punch driving element 45 is connected with the lower end face of the second lower cross beam 43. The lower inner punch driving element 45 is used to drive the lower inner punch 41, the second lower cross beam 43 and the connecting body 44 to move in the vertical direction.

[0060] The support structure comprises a support table 321, a first connecting pad 322 and a second connecting pad 323. The lower outer punch 31 is connected to the upper end surface of the support table 321 through a lower outer punch gland 34. A second through hole is formed in the support table 321, and the diameter of the second through hole matches the outer diameter of the lower inner punch body. The lower outer punch connecting part is connected to the upper end surface of the support table 321 through the lower outer punch gland 34. The upper end surface of the first connecting pad 322 is connected to the lower end surface of the support table 321, and the first connecting pad 322 is arranged to support the support table 321. The upper end surface of the second connecting pad 323 is connected to the lower end surface of the first connecting pad 322, and the lower end surface of the second connecting pad 323 is connected to the upper end surface of the first lower cross beam 33. The first lower cross beam 33 is provided with a third through hole, and part of the connecting body 44 is arranged in the third through hole. Two lower outer punch driving elements 35 are symmetrically arranged on the lower end surface of the first lower cross beam 33 with the center line of the first lower cross beam 33 as the axis. The lower outer punch driving element 35 is arranged to drive the lower outer punch 31, the support structure and the first lower cross beam 33 to move in the vertical direction.

[0061] In the embodiment, the upper punch driving element 12, the lower outer punch driving element 35 and the lower inner punch driving element 45 are all arranged as air cylinders.

[0062] The use method of the Nd-Fe-B magnetic ring hot forming device will be described in detail below.

[0063] (1) The lower outer punch driving element 35 drives the lower outer punch 31, the support structure and the first lower cross beam 33 to move upward until part of the lower outer punch body is placed in the cavity of the female mold. The lower inner punch driving element 45 drives the lower inner punch 41, the second lower cross beam 43 and the connecting body 44 to move upward until part of the lower inner punch body is placed in the cavity of the lower outer punch body. At the same time, a distance is formed between the upper end surface of the lower outer punch body and the upper end surface of the lower inner punch body, and the Nd-Fe-B blank is placed in the space formed by the two. The upper punch driving element 12 drives the upper punch 12 and the upper cross beam 13 to move downward until the lower end surface of the upper punch body is flush with the upper end surface of the lower outer punch body, and the lower inner punch body is moved upward to press the Nd-Fe-B blank, thereby forming a cold-pressed blank in the cavity of the lower outer punch body.

[0064] (2) After heating the cold-pressed blank, the lower inner punch body continues to press the cold-pressed blank to form a hot-pressed blank.

[0065] (3) The lower outer punch driving element 35 drives the lower outer punch 31, the support structure and the first lower cross beam 33 to move downward until the upper end surface of the lower outer punch body is flush with the upper end surface of the lower inner punch body. Under the condition of heating, the lower outer punch body and the lower inner punch body are moved simultaneously to press the hot-pressed blank, thereby forming a pre-deformed embryo.

[0066] (4) keeping the lower outer punch body and the lower inner punch body still, moving the upper punch body to press the pre-deformed blank body downward to form the neodymium-iron-boron magnetic ring.

[0067] The utility model is not limited to the above-mentioned embodiment, any deformation, improvement, replacement that the person skilled in the art can think of without departing from the essential content of the utility model falls into the range of the utility model.

Claims

1. A neodymium-iron-boron magnetic ring forming device, characterized in that, The upper punch assembly, the female die assembly, the lower outer punch assembly and the lower inner punch assembly are included; wherein, The upper punch assembly includes an upper punch, an upper punch fixing part and an upper punch driving element; the upper punch fixing part is connected with the upper punch and the upper punch driving element respectively, and the upper punch driving element is arranged to drive the upper punch to move in the vertical direction; The female die assembly includes a female die; the female die has a die cavity, and the die cavity has an upper die cavity port and a lower die cavity port; the upper punch is arranged to be able to extend into the die cavity from the upper die cavity port; The lower outer punch assembly includes a lower outer punch, a lower outer punch fixing part and a lower outer punch driving element; the lower outer punch has a cavity; the lower outer punch fixing part is arranged below the female die assembly, and the lower outer punch fixing part is connected with the lower outer punch and the lower outer punch driving element respectively; the lower outer punch driving element is arranged to drive the lower outer punch to move in the vertical direction; the lower outer punch is arranged to be able to extend into the die cavity from the lower die cavity port; The lower inner punch assembly includes a lower inner punch, a lower inner punch fixing part and a lower inner punch driving element; the lower inner punch fixing part is connected with the lower inner punch and the lower inner punch driving element respectively; at least a part of the lower inner punch is located in the cavity of the lower outer punch; the lower inner punch driving element is arranged to drive the lower inner punch to move in the cavity of the lower outer punch.

2. The neodymium-iron-boron ring forming device according to claim 1, characterized in that The upper punch includes an upper punch body and an upper punch connecting part; the upper end of the upper punch body is connected with the upper punch connecting part; the diameter of the upper punch body is the same as the diameter of the die cavity of the female die.

3. The neodymium-iron-boron ring forming device of claim 2, wherein, The lower outer punch includes a lower outer punch body and a lower outer punch connecting part; the lower outer punch body has a cavity, and the lower outer punch connecting part is sleeved on the bottom of the lower outer punch body; the outer diameter of the lower outer punch body is the same as the diameter of the die cavity of the female die.

4. The neodymium iron boron magnetic ring forming device according to claim 3, characterized in that, The lower inner punch includes a lower inner punch body and a lower inner punch connecting part; the lower end of the lower inner punch body is connected with the lower inner punch connecting part; the diameter of the lower inner punch body is the same as the diameter of the cavity of the lower outer punch body.

5. The neodymium iron boron magnetic ring forming device according to claim 2, wherein, The upper punch fixing part includes an upper punch gland and an upper cross beam; the upper punch is connected with the lower end surface of the upper cross beam through the upper punch gland; the upper punch driving element is connected with the upper end surface of the upper cross beam.

6. The neodymium iron boron magnetic ring forming device according to claim 3, wherein, The female die assembly further includes a female die gland and a fixed cross beam; the female die is connected with the upper end surface of the fixed cross beam through the female die gland; the fixed cross beam is provided with a first through hole, the first through hole is communicated with the die cavity, and the diameter of the first through hole is the same as the diameter of the die cavity; the lower outer punch body is arranged in the first through hole of the fixed cross beam and extends into the die cavity from the lower die cavity port.

7. The neodymium-iron-boron ring forming device of claim 4, wherein, The lower outer punch fixing part includes a support structure, a first lower cross beam and a lower outer punch gland; The support structure comprises a support table and a connecting pad; the lower outer punch is connected with the upper end surface of the support table through the lower outer punch gland; the connecting pad is provided with at least one; the upper end surface of the connecting pad is connected with the lower end surface of the support table; the lower end surface of the connecting pad is connected with the upper end surface of the first lower cross beam; the support table is provided with a second through hole, and the diameter of the second through hole is the same as the outer diameter of the lower inner punch body; the lower inner punch body is arranged in the second through hole of the support table and moves up and down in the cavity of the lower outer punch body.

8. The neodymium iron boron magnetic ring forming device according to claim 7, characterized in that, The connecting pad comprises a first connecting pad and a second connecting pad; the upper end surface of the first connecting pad is connected with the lower end surface of the support table, the upper end surface of the second connecting pad is connected with the lower end surface of the first connecting pad, and the lower end surface of the second connecting pad is connected with the upper end surface of the first lower cross beam.

9. The neodymium iron boron ring forming device of claim 8, wherein, The lower inner punch fixing part comprises a lower inner punch gland, a second lower cross beam and a connecting body; the first lower cross beam is provided with a third through hole, and a part of the connecting body is arranged in the third through hole; the lower inner punch is connected with the upper end surface of the connecting body through the lower inner punch gland, and the lower end surface of the connecting body is connected with the upper end surface of the second lower cross beam; the lower inner punch driving element is connected with the lower end surface of the second lower cross beam.

10. The neodymium iron boron ring forming device of claim 1, wherein, The upper punch driving element, the lower outer punch driving element and the lower inner punch driving element are respectively independently provided as a pneumatic cylinder or a hydraulic cylinder.

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