CN217393755U - Press forming die - Google Patents

Abstract

The application relates to the technical field of amorphous alloy magnetic powder core production, in particular to a compression molding die. A press-forming die includes: the mold comprises a first mold, a second mold and a third mold. The first mold is provided with a first protruding part, and the first protruding part is provided with a blind hole. The second mold has a second projection and a third projection. The third die has a through hole; the through hole has a first open end and an opposite second open end; the first protruding part of the first mold is connected to the first opening end and extends into the through hole; the second bulge of the second mold is connected to the second opening end of the third mold, and the third bulge is connected in the blind hole. The end face of the second protruding part is not in contact with the end face of the first protruding part, so that the end face of the second protruding part, the end face of the first protruding part and the inner wall of the through hole are enclosed to form a forming space. The compression molding die can be applied to compression molding of the amorphous alloy magnetic powder core, greatly improves convenience and ensures product quality.

Description

Press forming die

Technical Field

The application relates to the technical field of amorphous alloy magnetic powder core production, in particular to a compression molding die.

Background

The amorphous alloy magnetic powder core is a novel composite soft magnetic material, has good frequency characteristic and energy-saving characteristic, and is a key element of an inductance device in modern power electronic equipment. The preparation method commonly used at present comprises the following steps: firstly, preparing and screening amorphous alloy powder with a target particle size by a strip crushing or gas atomization method, then respectively passivating and insulating and coating by adopting a passivating agent and a bonding agent, then pressing the powder into a magnetic core with a target shape by adopting a cold pressing method, finally carrying out plasma discharge sintering on a mould provided with the magnetic core together, and demoulding the magnetic core after sintering to obtain the amorphous alloy magnetic powder core with certain soft magnetic performance.

The compression molding of the magnetic ring is one of the key processes, and the state of the molded magnetic ring has great influence on the performance of the magnetic core after subsequent processing.

The existing forming equipment for the amorphous magnetic powder core is in one-way opposite-pressing forming during pressing, when the method is used for producing products, the pressure intensity distribution in a cavity is uneven, the difference between the edge density and the center density of an annular magnetic core product is easily caused, the material can expand after sintering to cause demoulding difficulty, the existing mould is difficult to realize convenient and lossless demoulding, the magnetic ring is easy to deform or crack, and the product quality is greatly influenced.

In addition, the metal magnetic ring forming mold disclosed at present has more structural components, and the complex structure can cause difficulty in the assembling process and is difficult to consider both the durability and the processing efficiency. The known metal magnetic ring forming die is composed of 8 complex components, the material is inevitably subjected to micro deformation in the sintering process, and the complex structure is more easily damaged in the long-term use process. Another known metal powder annular magnetic core product forming mold is composed of 4 components, but the female mold is in a suspended state, and this unstable matching structure causes the assembly and disassembly of the mold to be more difficult, and it is difficult to ensure the stability of the product quality.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of this application is to provide a compression moulding mould, can be used for the manufacturing of metallic glass magnetic powder core, and the mould is simple, and die-filling, drawing of patterns are convenient, and the magnetic ring that makes is difficult for appearing deformation or fracture phenomenon, has effectively improved the quality of product.

The application provides a press forming die, includes:

the first die is provided with a first protruding part, and the first protruding part is provided with a blind hole;

a second mold having a second projection and a third projection; and

a third mold having a through hole; the through hole has a first open end and an opposite second open end; the first protruding part of the first mold is connected to the first opening end and extends into the through hole; the second bulge of the second mold is connected to the second opening end of the third mold, and the third bulge is connected in the blind hole;

the end face of the second protruding part is not in contact with the end face of the first protruding part, so that the end face of the second protruding part, the end face of the first protruding part and the inner wall of the through hole are enclosed to form a forming space.

The compression molding die can be applied to compression molding of the amorphous alloy magnetic powder core. When in use, the amorphous alloy powder coated with the insulation is added into the molding space, and then compression molding is carried out. The pressure intensity in the die cavity is uniformly distributed, the difference between the edge density and the center density of an annular magnetic core product is not easily caused, the sintered material is not easy to expand, the problem of difficult demoulding is solved, and compared with the conventional one-way pressing die, the die greatly improves the convenience and ensures the product quality.

This press forming die only comprises three parts of first mould, second mould and third mould, and the part is small in quantity, and overall structure is simple, and the die filling and the die stripping of whole mould are all very swift convenient. For complicated, the difficult mould structure of assembling process among the prior art, the mould of this application has greatly improved machining efficiency, and the mould part is less moreover, and the probability that appears damaging reduces, and relative life increases, and the durability of mould improves.

In other optional embodiments of the present application, a length of the third protruding portion is smaller than a length of the blind hole, so that a gap is formed between an end surface of the third protruding portion and a bottom wall of the blind hole.

In other alternative embodiments of the present application, the first mold has a first connection surface, the first opening end and the first connection surface are both curved surfaces, and the two curved surfaces are matched with each other.

In other alternative embodiments of the present application, the second mold has a second connecting surface;

the second opening end is step-shaped, so that the second opening end is provided with an outer contact surface and an inner contact surface, and the outer contact surface is abutted against the second connecting surface;

the inner contact surface is abutted against the second convex part.

In other alternative embodiments of the present application, the inner diameter of the blind hole is equal to the outer diameter of the third protrusion.

In other alternative embodiments of the present application, the outer diameter of the first projection is equal to the inner diameter of the through hole.

In other alternative embodiments of the present application, the third die is cylindrical and the through-holes are arranged in the axial direction.

In other alternative embodiments of the present application, the first mold has a first supporting portion, the first supporting portion has a cylindrical shape, and the first protrusion is connected to a bottom surface of the first supporting portion; the diameter of the first supporting part is equal to that of the third die.

In other alternative embodiments of the present application, the second mold has a second supporting portion, the second supporting portion has a cylindrical shape, and the second protruding portion is connected to a bottom surface of the second supporting portion; the diameter of the second supporting part is equal to that of the third die;

the third protruding part and the second protruding part are both cylindrical, and the diameter of the second protruding part is smaller than that of the second supporting part; the diameter of the third projection is smaller than the diameter of the second projection.

In other alternative embodiments of the present application, the free end of the third projection has a pointed end.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a first view angle of a press forming die provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a second view angle of a press forming die provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a second mold of a press forming mold according to an embodiment of the present application.

Icon: 100-pressing a forming die; 110-a first mold; 111-a first projection; 112-blind holes; 1121-bottom wall; 113-a first support; 114-a first connection face; 120-a second mold; 121-a second projection; 122-a third projection; 1221-tip portion; 123-a second support; 124-a second connection face; 130-a third mold; 131-a through hole; 1311-a first open end; 1312-a second open end; 1313-external contact surface; 1314-inner contact surface; 140-forming space.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be understood that the terms "upper", "left", "right", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships customarily placed in use of products of the application, or orientations or positional relationships routinely understood by those skilled in the art, which are merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the application.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1 to 3, some embodiments of the present disclosure provide a press forming mold 100, including: a first mold 110, a second mold 120, and a third mold 130.

Further, the first mold 110 has a first protrusion 111, and the first protrusion 111 has a blind hole 112.

Further, the second mold 120 has a second protrusion 121 and a third protrusion 122.

Further, the third mold 130 has a through hole 131; the through-hole 131 has a first open end 1311 and an opposite second open end 1312; the first protrusion 111 of the first mold 110 is connected to the first open end 1311 and the first protrusion 111 extends into the through hole 131; the second protrusion 121 of the second mold 120 is connected to the second open end 1312 of the third mold 130, and the third protrusion 122 is connected in the blind hole 112.

Further, the end surface of the second protrusion 121 is not in contact with the end surface of the first protrusion 111, so that the end surface of the second protrusion 121, the end surface of the first protrusion 111 and the inner wall of the through hole enclose a molding space 140.

The press forming die 100 can be applied to press forming of amorphous alloy magnetic powder cores. When in use, the amorphous alloy powder coated with the insulation is added into the molding space 140, and then is subjected to compression molding.

The press forming die 100 is composed of only three parts, namely a first die 110, a second die 120 and a third die 130, the number of the parts is small, the overall structure is simple, and the die filling and the die removing of the whole die are both rapid and convenient. For complicated, the difficult mould structure of assembling process among the prior art, the mould of this application has greatly improved machining efficiency, and the mould part is less moreover, and the probability that appears damaging reduces, and relative life increases, and the durability of mould improves.

Further, this mould, the amorphous alloy powder after will insulating cladding holds behind the shaping space 140 that the inner wall of the through-hole 131 of third mould 130 and first bulge 111 and second bulge 121 enclose and close the formation, first mould 110 and the shutoff of second mould 120 are at two open ends of third mould 130, thereby can follow two directions to the pressure forming, the pressure distribution in this kind of mould die cavity is even, be difficult for leading to the edge density and the central density of annular magnetic core product to appear the difference, and the difficult inflation of material after the sintering, do not have the difficult problem of drawing of patterns, for present one-way pressing mould, greatly improved the convenience, guaranteed product quality.

Further, referring to fig. 1, in some embodiments of the present application, the first mold 110 has a first support part 113, the first support part 113 has a cylindrical shape, and the first protrusion 111 is connected to one bottom surface of the first support part 113; the diameter of the first support part 113 is equal to that of the third mold 130.

In the illustrated embodiment, the height of the first support 113 of the first mold 110 is much smaller than the height of the third mold 130. One bottom surface of the first cylindrical mold 110 is connected to the first protrusion 111 having a circular rod shape, and the other bottom surface is a flat surface. When the die is used, pressure is applied to the flat surface after the die is assembled.

It should be noted that the length of the first protrusion 111 can be set according to actual needs.

In the illustrated embodiment, the length of the first protrusion 111 is close to the length of the through hole 131 of the third mold 130. After the mold is assembled, the insulation coated amorphous alloy powder is added into the molding space 140, and the first mold 110 is pressed down to the insulation coated amorphous alloy powder at the end of the first protrusion 111 by applying pressure to the flat surface of the first supporting part 113, thereby achieving press molding.

Further, referring to fig. 2, the second mold 120 has a second supporting portion 123, the second supporting portion 123 is cylindrical, and the second protrusion 121 is connected to a bottom surface of the second supporting portion 123; the diameter of the second supporting portion 123 is equal to the diameter of the third mold 130.

Further, in the illustrated embodiment, the height of the second supporting portion 123 of the second mold 120 is much smaller than the height of the third mold 130. A cylindrical second protrusion 121 is connected to one bottom surface of the cylindrical second mold 120, a third protrusion 122 is connected to an upper surface of the second protrusion 121, and the other bottom surface of the cylindrical second mold 120 is a flat surface. When in use, after the die is assembled, the flat surface is placed on a platform of the tablet press.

In the illustrated embodiment, the height of the second protrusion 121 of the second mold 120 and the stepped coupling depth of the second open end 1312 of the third mold 130 are matched with each other.

Further, the third protrusion 122 and the second protrusion 121 are both cylindrical, and the diameter of the second protrusion 121 is smaller than that of the second support 123; the diameter of the third projection 122 is smaller than the diameter of the second projection 121.

Further, the length of the third protrusion 122 is smaller than that of the blind hole 112, so that a gap is formed between the end surface of the third protrusion 122 and the bottom wall 1121 of the blind hole 112.

By forming a gap between the end surface of the third protrusion 122 and the bottom wall 1121 of the blind hole 112, the mold can be quickly and conveniently removed. Illustratively, after the use, the first mold 110, the second mold 120 and the third mold 130 are assembled together, the formed amorphous alloy magnetic powder core pressing ring is located in the forming space 140 of the mold, and when the mold is released, the second mold 120 is taken out first, and at this time, the second mold 120 can be taken out quickly and conveniently due to the gap formed between the end surface of the third protrusion 122 and the bottom wall 1121 of the blind hole 112. And then the first mold 110 is ejected downwards to place the formed amorphous alloy magnetic powder core on the working platform. The device has simple assembling and disassembling processes, and at the moment, because the magnetic powder core has uniform pressure intensity of the peripheral sections in the taking-out process, the phenomenon of stress concentration does not exist, the phenomena of deformation and cracking of the product during demoulding are effectively overcome, and the qualification rate of the product is greatly improved.

Further, the free end of the third projection 122 has a tip 1221.

By providing the pointed end 1221 at the free end of the third projecting portion 122, the second mold 120 and the third mold 130 can be easily detached, so that the mold can be easily and quickly released.

Further, the first mold 110 has a first connection surface 114, and the first opening end 1311 and the first connection surface 114 are both curved surfaces, and the two curved surfaces are matched with each other.

Through setting up first open end 1311 and first connection face 114 and being the cambered surface, and two cambered surfaces match each other, can reduce the stress concentration of mesa juncture in cold pressing process, prevent the deformation that the mould leads to under the effect of big stress.

It should be noted that the arc of the arc surface is as large as possible, so that the stress concentration of the first mold 110 and the second mold 120 is easier to reduce.

Further, the second mold 120 has a second connecting surface 124.

Further, the second opening end 1312 is stepped such that the second opening end 1312 has an outer contact surface 1313 and an inner contact surface 1314, and the outer contact surface 1313 abuts against the second connection surface 124.

Further, inner contact surface 1314 abuts second protrusion 121.

By arranging the inner contact surface 1314 to abut against the second protrusion 121, not only the connection between the second mold 120 and the third mold 130 is stable, but also the whole mold has a small volume and a compact structure.

Further, the inner diameter of the blind hole 112 is equal to the outer diameter of the third projecting portion 122.

By providing the inner diameter of the blind hole 112 to be equal to the outer diameter of the third projecting portion 122, the first die 110 and the second die 120 can be securely connected together.

Further, the outer diameter of the first protrusion 111 is equal to the inner diameter of the through hole 131.

By setting the outer diameter of the first protrusion 111 to be equal to the inner diameter of the through hole 131, the first mold 110 and the third mold 130 can be coupled together, and the coupling fastening property is good.

Further, the third mold 130 is cylindrical, and the through-hole 131 is provided in the axial direction.

Illustratively, the first mold 110 and the second mold 120 are attached to both bottom surfaces of the third mold 130, respectively.

Further, in some embodiments of the present application, the above-mentioned compression molding die 100 may be applied to amorphous alloy magnetic powder core preparation.

Illustratively, in use, the second die 120 is first placed on the tablet press platform, and the third die 130 is assembled over the second die 120, with the third die 130 located at the second open end 1312 of the second die 120, to form the annular forming space 140 within the through hole 131 of the second die 120. Then, after the insulation-coated amorphous alloy powder is added to the cavity, the first mold 110 is installed above the third mold 130, and the entire mold assembly is completed. At this time, a tablet press is used to apply stress to the combined dies, and the compression molding process is completed after a period of time. The entire mold is then sintered. And after the sintering process is finished, the second mold 120 is taken out, and the first mold 110 is ejected downwards to place the formed amorphous alloy magnetic powder core on the working platform. The device has simple assembling and disassembling processes, and at the moment, because the magnetic powder core has uniform pressure intensity of the peripheral sections in the taking-out process, the phenomenon of stress concentration does not exist, the phenomena of deformation and cracking of the product during demoulding are effectively overcome, and the qualification rate of the product is greatly improved.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A press forming die, comprising:

the first die is provided with a first protruding part, and the first protruding part is provided with a blind hole;

a second mold having a second projection and a third projection; and

a third mold having a through hole; the through hole has a first open end and an opposite second open end; the first protruding part of the first mold is connected to the first opening end and extends into the through hole; the second protrusion of the second mold is connected to the second open end of the third mold, and the third protrusion is connected within the blind hole;

the end face of the second protruding portion is not in contact with the end face of the first protruding portion, so that the end face of the second protruding portion, the end face of the first protruding portion and the inner wall of the through hole are enclosed to form a forming space.

2. The press-forming die according to claim 1,

the length of the third bulge is smaller than that of the blind hole, so that a gap is formed between the end face of the third bulge and the bottom wall of the blind hole.

3. The press-forming die according to claim 1,

the first die is provided with a first connecting surface, the first opening end and the first connecting surface are both cambered surfaces, and the two cambered surfaces are matched with each other.

4. The press-forming die according to claim 1,

the second die is provided with a second connecting surface;

the second opening end is step-shaped, so that the second opening end is provided with an outer contact surface and an inner contact surface, and the outer contact surface is abutted against the second connecting surface;

the inner contact surface abuts against the second protruding part.

5. The press-forming die according to any one of claims 1 to 4,

the inner diameter of the blind hole is equal to the outer diameter of the third protruding part.

6. The press-forming die according to any one of claims 1 to 4,

the outer diameter of the first protruding portion is equal to the inner diameter of the through hole.

7. The press-forming die according to claim 1,

the third mould is cylindric, the through-hole sets up along the axis direction.

8. The press-forming die of claim 7,

the first mold is provided with a first supporting part which is cylindrical, and the first bulge part is connected to one bottom surface of the first supporting part; the diameter of the first supporting part is equal to that of the third die.

9. The press-forming die of claim 7,

the second mold is provided with a second supporting part which is cylindrical, and the second bulge part is connected to one bottom surface of the second supporting part; the diameter of the second supporting part is equal to that of the third die;

the third protruding part and the second protruding part are both cylindrical, and the diameter of the second protruding part is smaller than that of the second supporting part; the diameter of the third projection is smaller than the diameter of the second projection.

10. The press forming die of claim 7,

the free end of the third projection has a tip end.

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