Magnetic steel forming die

Abstract

The magnetic steel forming die comprises a first die part and a second die part, the second die part comprises an upper side plate, a lower side plate, a left side plate, a right side plate, an extrusion plate and a limiting column, the upper side plate and the lower side plate are each provided with a first rack, a second rack and a gear meshed with the first rack and the second rack at the same time, the left side plate is fixedly connected with the first rack, and the right side plate is fixedly connected with the right side plate. The right side plate is fixedly connected with the second rack, a first forming face is arranged on the inner side wall of the left side plate, a second forming face is arranged on the inner side wall of the right side plate, and the first forming face and the second forming face comprise a pair of first inclined faces located at the two ends and an arc face connected with the first inclined faces respectively. Second slopes parallel to the first slopes are arranged on the outer side walls of the extrusion plates. According to the invention, the defects of high cost and serious waste in the existing cavity are overcome.

Description

Technical Field

[0001] The invention relates to the field of magnetic steel forming dies, and in particular to a magnetic steel forming die. Background Art

[0002] At present, NdFeB magnets are tetragonal crystals formed by neodymium, iron and boron. The magnetic energy product of this magnet is greater than that of samarium cobalt magnets, and it was the material with the largest magnetic energy product in the world when it was discovered. Most of the existing NdFeB magnets are formed by die stamping. The main steps are: first fill the mold cavity with raw materials, then magnetize the magnetic powder by passing magnets, then compact the magnetic powder by driving the pressure head through the press, and then demagnetize the magnetic powder by magnetizing in the opposite direction, and finally take it out and carry out the subsequent sintering process.

[0003] However, most of the existing cavities are distributed in a square shape, that is, the horizontal and vertical lines just bisect their two diagonals. This results in that after magnetization, since the magnetic circuit is from right to left and from bottom to top, several corners must be cut off in order to make the product's diagonals adapt to the direction of the magnetic circuit, resulting in high costs, waste and serious pollution. Summary of the invention

[0004] In view of the above problems, the present invention proposes a magnetic steel forming mold, which solves the problem that most of the existing cavities are distributed in a square shape, that is, the horizontal line and the vertical line just bisect their two diagonals. As a result, after magnetization, since the magnetic circuit is from right to left and from bottom to top, several corners must be cut off in order to make the product diagonally adapt to the magnetic circuit direction, resulting in high cost and serious waste.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A magnetic steel forming mold, comprising: a first mold part and a second mold part, the second mold part comprising an upper side plate, a lower side plate, a left side plate, a right side plate, an extrusion plate and a limiting column, the upper side plate and the lower side plate are both provided with a first rack, a second rack and a gear that simultaneously meshes with the first rack and the second gear, the left side plate is fixedly connected to the first rack, the right side plate is fixedly connected to the second rack, a first molding surface is provided on the inner side wall of the left side plate, a second molding surface is provided on the inner side wall of the right side plate, the first molding surface and the second molding surface form a magnetic steel forming cavity, a first connecting block connected to the first rack is provided on the left side plate, and a second connecting block connected to the second rack is provided on the right side plate, the first molding surface and the second molding surface include a pair of first inclined surfaces respectively located at both ends and an arc surface connecting the pair of first inclined surfaces, a molding groove is provided on the inner side wall of the extrusion plate, and a second inclined surface parallel to the first inclined surface is provided on the outer side wall of the extrusion plate, and the gear is used to externally connect an external driving source.

[0007] The present invention comprises a pair of first inclined surfaces respectively located at two ends and an arc surface connecting the pair of first inclined surfaces through the first molding surface and the second molding surface. The inner wall of the extrusion plate is provided with a molding groove, and the outer wall of the extrusion plate is provided with a second inclined surface parallel to the first inclined surface. The present invention solves the problem that most of the existing cavities are distributed in a square shape, that is, the horizontal line and the vertical line just bisect their two diagonals. This results in that after magnetization, since the magnetic circuit is from right to left and from bottom to top, several corners must be cut off in order to diagonally adapt the product to the magnetic circuit direction, resulting in high cost, waste and serious pollution.

[0008] Optionally, the first module includes an outer cover body and a bottom plate, and the bottom plate is connected to the outer cover body via a connecting piece.

[0009] Optionally, one end of the inner wall of the left plate and the right plate is provided with a locking piece, the other end of the inner wall of the left plate and the right plate is provided with a locking groove matched with the locking piece, and a limiting groove is provided on the inner side of the locking groove.

[0010] Optionally, a curved surface is provided at the end of the locking member, a sliding groove is provided on the curved surface, a trigger column is installed in the sliding groove, and the trigger column is connected to the bottom of the sliding groove through an elastic member.

[0011] Optionally, an outer groove is provided on the side wall of the trigger column, a rotating shaft is installed on the outer groove, a hollow air storage chamber is provided in the rotating shaft, a compression chamber is formed between the trigger column and the slide groove, the compression chamber is filled with compressed air, and the compression chamber is connected to the air storage chamber through an air pipe.

[0012] Optionally, a sealing plate is provided at the bottom of the trigger column.

[0013] Optionally, a rotating cylinder is mounted on the rotating shaft, the rotating cylinder is connected to a flip arm, a first cavity is defined in the flip arm, the first cavity is connected to an air storage cavity through the rotating cylinder, the first cavity is connected to a second cavity, the second cavity is connected to a vertically arranged air duct; a telescopic tube is provided at the lower portion of the air duct, an iron ball is provided at the end of the telescopic tube, an elastic sealing tube is provided at the outer side of the telescopic tube, an elastic bag is provided at the end of the flip arm, and the elastic bag is connected to the air duct.

[0014] Optionally, the elastic bag has an outer arc elastic sheet and a limiting sheet connected to the outer arc elastic sheet, an elastic membrane is provided on the inner side of the limiting sheet, and the elastic membrane is connected to the flip arm.

[0015] Optionally, the elastic member is connected to a conductive slide via a connecting column, a first conductive contact and a second conductive contact are provided in the slide groove, one end of the first conductive contact is electrically connected to a magnetic generator located on the inner side of the outer groove, a magnetic plate is provided on the flip arm close to the magnetic generator, the second conductive contact is electrically connected to one pole of an external power supply, and the magnetic generator is electrically connected to the other pole of the external power supply, the magnetic generator generates magnetic force, and the magnetic poles it generates are the same as the magnetic poles of the magnetic plate, so that the two generate a repulsive force.

[0016] Optionally, the limiting column includes a ring body and a column located at the center of the ring body.

[0017] Beneficial Effects

[0018] 1. The left plate and the right plate in the present invention move toward each other, and the first molding surface and the second molding surface cooperate with the extrusion plate to form a magnetic steel molding cavity, which solves the problem that most of the existing cavities are distributed in a square shape, that is, the horizontal line and the vertical line just bisect their two diagonals. This results in that after magnetization, since the magnetic circuit is from right to left and from bottom to top, several corners must be cut off in order to diagonally adapt the product to the direction of the magnetic circuit, resulting in high cost, serious waste and serious pollution.

[0019] 2. In the present invention, as the left plate and the right plate move toward each other, the trigger column is inserted into the locking groove, and as the trigger column contacts the end wall of the locking groove, the trigger column drives the elastic member to contract, and the contraction of the elastic member drives the conductive sliding piece to move and contact the first conductive contact piece and the second conductive contact piece at the same time. At this time, the magnetic generator is energized with electromagnetic force, and the magnetic poles generated by the magnetic generator are the same as the magnetic poles of the magnetic plate, so that the two generate a repulsive force, and at this time the flip arm is detached due to the repulsive force. During this period, a trigger column compresses the high-pressure gas in the compression chamber, and the high-pressure gas enters the elastic bag and the telescopic tube through the gas storage chamber and the air guide tube, so that the elastic bag and the telescopic tube expand. As the telescopic tube expands, the flip arm flips and extends into the limiting groove on the side wall of the locking groove. The expansion of the elastic bag causes the limiting plate to flip outward and snap into the limiting groove. When the gas in the elastic bag does not expand, its elastic sheet causes the limiting plate to fold; the trigger column is inserted into the limiting groove and locked by the elastic bag. At this time, the driving source stops working, and the trigger column is snapped into the locking groove to avoid the separation of the left plate and the right plate; the driving source can remain in a state of stopping working for a long time, making the molding process more energy-saving and environmentally friendly.

[0020] 3. The present invention uses a conductive sliding sheet, a first conductive contact sheet and a second conductive contact sheet. The entire structure is flatter and convenient to be buried in a locking member (1-4 cm thick). If a common WeChat trigger is used, the overall size is significantly larger. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a three-dimensional structural diagram of a forming die of a magnetic steel according to Example 1 of the present invention;

[0022] Figure 2 is an expanded view of a forming die for a magnetic steel according to Example 1 of the present invention;

[0023] Figure 3 It is an exploded view of the second mold part of the magnetic steel forming mold of Example 1 of the present invention;

[0024] Figure 4 is a three-dimensional view of the left side plate of the forming die of the magnetic steel of Example 2 of the present invention;

[0025] Figure 5 is a three-dimensional diagram of a locking member of a magnetic steel forming die according to Embodiment 2 of the present invention;

[0026] Figure 6 is a cross-sectional view of a locking member of a magnetic steel forming die according to Example 2 of the present invention;

[0027] Figure 7 The forming die of the magnetic steel of the second embodiment of the present invention is Figure 6 A partial enlarged view of part A.

[0028] The reference numerals in the figures are:

[0029] 1. First module, 2. Second module, 3. Upper side plate, 4. Lower side plate, 5. Left side plate, 6. Right side plate, 7. Extrusion plate, 8. Limiting column, 9. First rack, 10. Second rack, 11. Gear, 12. First molding surface, 13. Second molding surface, 14. First connecting block, 15. Second connecting block, 16. First inclined surface, 17. Arc surface, 18. Molding groove, 19. Second inclined surface, 20. Ring body, 21. Column, 22. Outer cover, 23. Bottom plate, 24. Connector, 25. Locking member, 26. Locking groove, 27. Magnetic plate, 28. Curved surface Surface, 29, slide groove, 30, trigger column, 31, elastic part, 32, outer groove, 33, rotating shaft, 34, air storage chamber, 35, compression chamber, 36, air pipe, 37, sealing plate, 38, rotating cylinder, 39, flip arm, 40, first cavity, 41, second cavity, 42, air guide tube, 43, telescopic tube, 44, iron ball, 45, elastic sealing cylinder, 46, elastic capsule, 47, outer arc elastic sheet, 48, limit sheet, 49, elastic membrane, 50, connecting column, 51, conductive sliding sheet, 52, first conductive contact sheet, 53, second conductive contact sheet, 54, magnetic generator. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] In the description of the present invention, unless otherwise specified, "multiple" means two or more than two; the orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Example 1

[0033] The technical solution adopted by the present invention is as follows:

[0034] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention discloses a forming mold for magnetic steel, comprising: a first mold 1 and a second mold 2, the second mold comprising an upper side plate 3, a lower side plate 4, a left side plate 5, a right side plate 6, an extrusion plate 7 and a limiting column 8, the upper side plate and the lower side plate are both provided with a first rack 9, a second rack 10 and a gear 11 that meshes with the first rack and the second gear at the same time, the left side plate is fixedly connected to the first rack, the right side plate is fixedly connected to the second rack, the inner side wall of the left side plate is provided with a first molding surface 12, and the inner side wall of the right side plate is provided with a second molding surface 13. Two molding surfaces 13, the first molding surface and the second molding surface form a magnetic steel molding cavity, the left side plate is provided with a first connecting block 14 connected to the first rack, the right side plate is provided with a second connecting block 15 connected to the second rack, the first molding surface and the second molding surface include a pair of first inclined surfaces 16 respectively located at both ends and an arc surface 17 connecting the pair of first inclined surfaces, the inner side wall of the extrusion plate is provided with a molding groove 18, the outer side wall of the extrusion plate is provided with a second inclined surface 19 parallel to the first inclined surface, and the gear is used to connect to an external driving source. The limit column includes a ring body 20 and a column 21 located at the center of the ring body. The first module includes an outer cover body 22 and a bottom plate 23, and the bottom plate is connected to the outer cover body through a connector 24.

[0035] When this embodiment is implemented, the driving source drives the gear to rotate, and the rotation of the gear drives the first rack and the second rack to rotate, thereby driving the left plate and the right plate to move toward or in the opposite direction. When the left plate and the right plate move toward each other, the first molding surface and the second molding surface cooperate with the extrusion plate to form a magnetic steel molded cavity.

[0036] Example 2

[0037] The difference between this embodiment 2 and embodiment 1 is that Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a locking piece 25 is provided at one end of the inner side wall of the left and right plates, and a locking groove 26 adapted to the locking piece is provided at the other end of the inner side wall of the left and right plates, and a limiting groove is provided on the inner side of the locking groove. A curved surface 28 is provided at the end of the locking piece, and a sliding groove 29 is provided on the curved surface. A trigger column 30 is installed in the sliding groove, and the trigger column is connected to the bottom of the sliding groove through an elastic member 31.

[0038] An outer groove 32 is provided on the side wall of the trigger column, a rotating shaft 33 is installed on the outer groove, a hollow air storage chamber 34 is provided in the rotating shaft, a compression chamber 35 is formed between the trigger column and the slide groove, the compression chamber is filled with compressed air, and the compression chamber is connected to the air storage chamber through an air pipe 36. A sealing plate 37 is provided at the bottom of the trigger column. The driving source of this embodiment is a driving motor, which has two working modes: positive direction rotation and negative direction rotation.

[0039] The rotating shaft is provided with a rotating cylinder 38, and the rotating cylinder is connected with a flip arm 39. The flip arm has a first cavity 40 in it, and the first cavity is connected to the air storage cavity through the rotating cylinder, and the first cavity is connected to the second cavity 41, and the second cavity is connected to a vertically arranged air duct 42; the lower part of the air duct is provided with an elastic telescopic tube 43, and the end of the telescopic tube is provided with an iron ball 44, and the outer side of the telescopic tube is provided with an elastic sealing cylinder 45, and the end of the flip arm is provided with an elastic bag 46, and the elastic bag is connected to the air duct. The elastic bag has an outer arc elastic sheet 47 and a limit sheet 48 connected to the outer arc elastic sheet, and an elastic membrane 49 is provided on the inner side of the limit sheet, and the elastic membrane is connected to the flip arm. It should be noted that the iron ball of the telescopic tube also plays the role of sealing the telescopic tube.

[0040] The elastic member is connected to a conductive slide 51 via a connecting column 50, a first conductive contact 52 and a second conductive contact 53 are provided in the slide groove, one end of the first conductive contact is electrically connected to a magnetic generator 54 located on the inner side of the outer groove, a magnetic plate 27 is provided on the flip arm close to the magnetic generator, the second conductive contact is electrically connected to one pole of an external power source, and the magnetic generator is electrically connected to the other pole of the external power source, the magnetic generator generates magnetic force when energized, and the magnetic poles generated by the magnetic generator are the same as the magnetic poles of the magnetic plate, so that the two generate a repulsive force.

[0041] When this embodiment is implemented, as the left plate and the right plate move toward each other, the trigger column is inserted into the locking groove, and as the trigger column contacts the end wall of the locking groove, the trigger column drives the elastic member to contract, and the elastic member contracts to drive the conductive sliding piece to move and contact the first conductive contact piece and the second conductive contact piece at the same time. At this time, the magnetic force generator passes electromagnetic force to absorb the iron ball at the end of the telescopic tube on the one hand, and on the other hand, the magnetic poles generated by it are the same as the magnetic poles of the magnetic plate, so that the two generate repulsion. At this time, the flip arm is separated due to the repulsion. During this period, the trigger column compresses the high-pressure gas in the compression chamber, and the high-pressure gas enters the elastic bag and the telescopic tube through the gas storage chamber and the air guide tube, so that the elastic bag and the telescopic tube expand. As the telescopic tube expands, the flip arm flips and extends to the limit groove on the side wall of the locking groove. The expansion of the elastic bag causes the limit piece to turn outward and snap into the limit groove. When the gas in the elastic bag does not expand, its elastic piece causes the limit piece to fold. Only when the driving source is working, it generates a strong power that can directly push the elastic bag to fold and the flip arm to flip, and finally the locking member is separated from the locking groove, and the trigger column automatically rebounds.

[0042] The above description is only a preferred embodiment of the present invention, and does not limit the patent protection scope of the present invention. Any equivalent structural transformation made by using the contents of the present invention and the drawings, directly or indirectly used in other related technical fields, is also included in the protection scope of the present invention.

Claims

1. A forming die for magnetic steel, characterized in that: include: The first module and the second module, the second module comprising an upper side plate, a lower side plate, a left side plate, a right side plate, an extrusion plate and a limiting column, the upper side plate and the lower side plate are both provided with a first rack, a second rack and a gear that simultaneously meshes with the first rack and the second gear, the left side plate is fixedly connected to the first rack, the right side plate is fixedly connected to the second rack, the inner side wall of the left side plate is provided with a first molding surface, the inner side wall of the right side plate is provided with a second molding surface, the first molding surface and the second molding surface form a magnetic steel molded cavity, the left side plate is provided with a first connecting block connected to the first rack, the right side plate is provided with a second connecting block connected to the second rack, the first molding surface and the second molding surface include a pair of first inclined surfaces respectively located at both ends and an arc surface connecting the pair of first inclined surfaces, the inner side wall of the extrusion plate is provided with a molding groove, the outer side wall of the extrusion plate is provided with a second inclined surface parallel to the first inclined surface, and the gear is used to externally connect an external driving source.

2. A magnetic steel forming die as claimed in claim 1, characterized in that: The first module includes an outer cover and a bottom plate, and the bottom plate is connected to the outer cover via a connecting member.

3. A magnetic steel forming die as claimed in claim 1, characterized in that: One end of the inner side wall of the left plate and the right plate is provided with a locking piece, and the other end of the inner side wall of the left plate and the right plate is provided with a locking groove matched with the locking piece, and a limiting groove is provided on the inner side of the locking groove.

4. A magnetic steel forming die as claimed in claim 1, 2 or 3, characterized in that: The end of the locking piece is provided with a curved surface, a slide groove is provided on the curved surface, a trigger column is installed in the slide groove, and the trigger column is connected to the bottom of the slide groove through an elastic piece.

5. A magnetic steel forming die as claimed in claim 4, characterized in that: An outer groove is provided on the side wall of the trigger column, a rotating shaft is installed on the outer groove, a hollow air storage chamber is provided in the rotating shaft, a compression chamber is formed between the trigger column and the slide groove, the compression chamber is filled with compressed air, and the compression chamber is connected to the air storage chamber through an air pipe.

6. A magnetic steel forming die as claimed in claim 4, characterized in that: A sealing plate is provided at the bottom of the trigger column.

7. A magnetic steel forming die as claimed in claim 5, characterized in that: A rotating cylinder is mounted on the rotating shaft, the rotating cylinder is connected to a flip arm, a first cavity is arranged in the flip arm, the first cavity is connected to an air storage cavity through the rotating cylinder, the first cavity is connected to a second cavity, the second cavity is connected to a vertically arranged air duct; a telescopic tube is arranged at the lower part of the air duct, an iron ball is arranged at the end of the telescopic tube, an elastic sealing tube is arranged on the outside of the telescopic tube, an elastic bag is arranged at the end of the flip arm, and the elastic bag is connected to the air duct.

8. A magnetic steel forming die as claimed in claim 7, characterized in that: The elastic bag comprises an outer arc elastic piece and a limiting piece connected to the outer arc elastic piece, an elastic film is arranged on the inner side of the limiting piece, and the elastic film is connected to the flip arm.

9. A magnetic steel forming die as claimed in claim 8, characterized in that: The elastic member is connected to a conductive sliding piece via a connecting column, a first conductive contact piece and a second conductive contact piece are provided in the sliding groove, one end of the first conductive contact piece is electrically connected to a magnetic generator located on the inner side of the outer groove, a magnetic plate is provided on the flip arm close to the magnetic generator, the second conductive contact piece is electrically connected to one pole of an external power supply, and the magnetic generator is electrically connected to the other pole of the external power supply, the magnetic generator generates magnetic force, and the magnetic pole generated by the magnetic generator is the same as the magnetic pole of the magnetic plate, so that the two generate a repulsive force.

10. A magnetic steel forming die as claimed in claim 1, 2 or 3, characterized in that: The limiting column comprises a ring body and a column body located at the center of the ring body.

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