CN211758451U - Forming die for magnetic material - Google Patents
Forming die for magnetic material Download PDFInfo
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- CN211758451U CN211758451U CN202020099878.6U CN202020099878U CN211758451U CN 211758451 U CN211758451 U CN 211758451U CN 202020099878 U CN202020099878 U CN 202020099878U CN 211758451 U CN211758451 U CN 211758451U
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Abstract
The utility model provides a forming die for magnetic material and suppression method thereof belongs to suppression magnetic material technical field. It has solved the problem that current unburned bricks ftracture easily or lack the limit and the effort that is used in each die cavity is different at the drawing of patterns in-process. The utility model relates to a forming die for magnetic material includes embossing mold, die cavity, template, suppression subassembly, benefit pressure subassembly, directional piece and fixed block. The utility model discloses in, when two suppression subassemblies are at the in-process of suppression magnetic material, pass the directional piece that corresponds or suppress the subassembly and pass the clamp plate that corresponds because of suppressing the subassembly activity, effort on the directional piece restraint suppression subassembly, promptly, make the template all be located the central axis of suppression subassembly to the effort of suppression subassembly and unburned bricks reaction force to the suppression subassembly, and then make the effort that is used in the template equally divide to each suppression subassembly on, thereby press forming's unburned bricks shape and size are all the same.
Description
Technical Field
The utility model belongs to the technical field of suppression magnetic material, a forming die for magnetic material is related to.
Background
In the orientation forming process of the rare earth permanent magnet material, one die can be used for extruding one green body or a plurality of green bodies, the green bodies are usually extruded by one die and are called as 'one-out-more', the one-out-more-than-two types, and a plurality of pressing die cavities (usually special-shaped die cavities) are formed and are suitable for small cylindrical products; the other is that a plurality of pressing dies are formed, and the method is suitable for products such as tile shapes, square blocks and the like, the forming and demolding process of the rare earth permanent magnet material is generally protective demolding, namely, the pressed and formed green bodies are slowly separated from a mold cavity under the protection of the pressure of an upper pressure head and a lower pressure head, and the demolding mode is favorable for slowing down the release of elastic after-effect and reducing the phenomena of cracking and corner falling of the green bodies in the demolding process.
The rare earth permanent magnetic powder is usually prepared by adopting an air flow milling or ball milling process, the uniformity of the powder prepared by the processes is poor, and the flowability of the powder during weighing and orientation molding is also poor due to the particularity of the powder, so that the weight difference of the powder in different pressing molds exists. When the rare earth permanent magnet powder is subjected to orientation forming, when a plurality of pressing dies are used for simultaneously generating a plurality of green bodies, in the pressing process, the pressure borne by the powder is obviously different due to the weight difference of the powder in different pressing dies, particularly, the pressure borne by the green bodies with less weight of the powder is smaller, so that the elastic back pressure generated by the pressed green bodies is different, the density of the green bodies is different, and the green bodies are very easy to damage in the subsequent demolding process. During the demolding of the magnetic material, the lower pressure head moves at a speed of 10-80mm/s, and the upper pressure head moves at a speed greater than the lower pressure head, typically 3-5 times the speed of the lower pressure head. If the moving speed of the two pressure heads is as fast, the elastic after-effect of the green body can not be released, and the green body can generate cracks after being separated from the die cavity; if the moving speed of the upper pressure head is too fast, the upper pressure head and the green body are separated from contact when the green body is not separated from the die cavity, the demolding mode is not required to be protected, and the green body is easy to crack or have corner falling phenomena.
Disclosure of Invention
The utility model aims at having above-mentioned problem to current technique, provided a unburned bricks in the drawing of patterns in-process difficult fracture or fall the corner and be used in the less forming die who is used for magnetic material of effort difference of each die cavity and suppression method thereof.
The purpose of the utility model can be realized by the following technical proposal: a molding die for a magnetic material, comprising:
the pressing die is internally provided with at least one die cavity; the two sides of each pressing die are movably provided with templates, each template is provided with a pressing assembly for pressing a magnetic material into a corresponding die cavity, at least one pressing assembly is elastically connected with the corresponding template through a pressure supplementing assembly, the pressure supplementing assembly is provided with an orientation block for directionally moving the corresponding pressing assembly, and at least one pressing assembly is connected with the corresponding template through a fixing block.
In the above-mentioned forming die for magnetic material, each pressing assembly includes a pressing head and a connecting rod, and the pressing head is detachably connected with one end of the corresponding connecting rod.
In the above-mentioned forming die for magnetic material, the one end that the pressure head was kept away from to the connecting rod is equipped with the fly leaf, the cross sectional area of fly leaf is greater than the cross sectional area of connecting rod, be equipped with the lug on the fly leaf.
In the above-mentioned forming die for a magnetic material, a guide hole for movably penetrating a corresponding connecting rod and a movable hole for movably penetrating a movable plate are formed in the orientation block.
In foretell a forming die for magnetic material, the pressure supplementing subassembly includes the protection piece, seted up the protection hole in the protection piece, be equipped with the spring in the protection hole, the one end of spring supports the bottom in protection hole, and the other end of spring supports the lug, the protection piece can be dismantled with directional piece and be connected.
In the above-mentioned forming die for a magnetic material, each of the connecting rods is fixedly connected with the fixing block or detachably connected with the fixing block.
In the above-mentioned forming die for a magnetic material, a press plate for fixing the connecting rods is detachably connected to the fixing block, and each connecting rod passes through the press plate.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the utility model discloses in, when two suppression subassemblies are at the in-process of suppression magnetic material, pass the directional piece that corresponds or suppress the subassembly and pass the clamp plate that corresponds because of suppressing the subassembly activity, effort on the directional piece restraint suppression subassembly, promptly, make the template all be located the central axis of suppression subassembly to the effort of suppression subassembly and unburned bricks reaction force to the suppression subassembly, and then make the external effort of acting on the template can equally divide equally to each suppression subassembly, thereby press forming's unburned bricks shape and size are all the same.
2. Through the setting of at least one pressure supplementing assembly, when last pressure head and pressure difference down produce between the pressure head, this pressure supplementing assembly enables to correspond the last pressure head in the die cavity or pressure generation of press head to the unburned bricks in this die cavity down, reduces the pressure difference of last pressure head in different die cavities or press head to the unburned bricks through pressure supplementing assembly simultaneously, so that the unburned bricks in the die cavity break away from smoothly from the die cavity that corresponds.
Drawings
FIG. 1 is a diagram of a process in which a magnetic material is pressed into a green compact according to one embodiment.
Fig. 2 is a combination view of the pressing member mounted on the die plate via the fixing block according to the second embodiment.
FIG. 3 is a diagram showing a process in which a magnetic material is pressed into a green compact according to the second embodiment.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
The utility model relates to a forming die for magnetic material includes embossing mold 100, die cavity 110, template 200, suppression subassembly 300, mends and presses subassembly 400, directional piece 500 and fixed block 600.
In the present invention, the die plate 200 located below the pressing die 100 is referred to as a lower die plate 220, the die plate 200 located above the pressing die 100 is referred to as an upper die plate 210, the pressing assembly 300 located on the lower die plate 220 is referred to as a lower pressing assembly 320, the pressing assembly 300 located on the upper die plate 210 is referred to as an upper pressing assembly 310, the pressing head 360 located on the lower die plate 220 is referred to as a lower pressing head 362, the pressing head 360 located on the upper die plate 210 is referred to as an upper pressing head 361, the connecting rod 350 between the lower die plate 220 and the lower pressing head 362 is referred to as a lower connecting rod 352, and the connecting rod 350 between the upper die plate 210 and the upper pressing head 361 is referred to as an upper connecting; secondly, the utility model discloses a shape and the size homogeneous phase of each die cavity are the same.
In the present invention, the magnetic material pressed and formed by the upper pressing assembly 310 and the lower pressing assembly 320 is referred to as a green body.
The first embodiment is as follows:
as shown in fig. 1, in the present embodiment, the upper pressing assembly 310 and the lower pressing assembly 320 are elastically connected to the corresponding mold plate 200 through the corresponding pressure compensating assembly 400.
The pressing die 100 is internally provided with at least one die cavity 110, the two sides of the pressing die 100 are respectively movably provided with a die plate 200, each die plate 200 is provided with a pressing assembly 300 for pressing a magnetic material into the corresponding die cavity 110, at least one pressing assembly 300 is elastically connected with the corresponding die plate 200 through a pressure supplementing assembly 400, the pressure supplementing assembly 400 is provided with an orientation block 500 for directionally moving the corresponding pressing assembly 300, in the process of pressing the magnetic material, people need to insert a lower pressing assembly 320 into the corresponding die cavity 110, then pour the magnetic material into the corresponding die cavity 110, and then move an upper pressing assembly 310, so that the upper pressing assembly 310 and the lower pressing assembly 320 press the magnetic material in the die cavity 110 to be formed, and then move the upper pressing assembly 310 and the lower pressing assembly 320 along the axial direction of the corresponding die cavity 110, because the upper pressing assembly 310 is elastically connected with the upper die plate 210 through the corresponding pressure supplementing assembly 400, the lower pressing assembly 320 is elastically connected with the lower template 220 through the corresponding pressure supplementing assembly 400, so that in the process that the upper pressing assembly 310 and the lower pressing assembly 320 drive the green bodies to move along the axial direction of the corresponding die cavities 110, the two pressure supplementing assemblies 400 always provide pressure difference for the upper pressing assembly 310 and the lower pressing assembly 320, namely, the pressure change of the green bodies in the moving process is compensated, and the green bodies are prevented from cracking or lacking edges in the demolding process; next, during the process of pressing the magnetic material, the upper pressing assembly 310 and the lower pressing assembly 320, as the upper press assembly 310 moves through the corresponding orientation block 500, the lower press assembly 320 moves through the corresponding orientation block 500, such that the orientation block 500 restrains the force on the upper press assembly 310 or the lower press assembly 320, i.e., such that the force exerted by the upper platen 210 on the upper press assembly 310 and the reaction force of the green body on the upper press assembly 310 are both on the central axis of the upper press assembly 310, and, similarly, so that the force of the lower platen 220 on the lower press assembly 320 and the reaction force of the green body on the lower press assembly 320 are both on the central axis of the lower press assembly 320, thereby enabling the force applied to the upper platen 210 to be equally distributed to each upper press assembly 310 and the force applied to the lower platen 220 to be equally distributed to each lower press assembly 320, so that the press-formed green bodies have the same shape and size.
Each pressing assembly 300 comprises a pressing head 360 and a connecting rod 350, wherein the pressing head 360 is detachably connected with one end of the corresponding connecting rod 350, so that when the pressing head 360 is damaged, people can directly detach the pressing head 360 from the corresponding connecting rod 350 and replace the pressing head 360 with the same specification, so that the pressing assembly 300 can be used again; specifically, the pressing head 360 may be in threaded connection with the corresponding connecting rod 350, the pressing head 360 may be in fastening connection with the corresponding connecting rod 350, when the pressing head 360 is fastened to the corresponding connecting rod 350, one end of the pressing head 360 is provided with the fastening head 340, and the fastening head 340 is inserted into the connecting rod 350, so as to realize fastening connection between the connecting rod 350 and the pressing head 360.
The cross sectional area of every pressure head 360 all is the same with the cross sectional area who corresponds die cavity 110, and pressure head 360 can dismantle with the connecting rod 350 that corresponds and be connected, consequently, people can select the embossing mold 100 that has the die cavity 110 of corresponding specification and the pressure head 360 that corresponds the specification according to actual demand for the unburned bricks that the embossing can accord with actual demand.
The end of the connecting rod 350 far from the pressing head 360 is provided with a movable plate 330, the sectional area of the movable plate 330 is larger than that of the connecting rod 350, the movable plate 330 is provided with a bump 331, the directional block 500 is internally provided with a guide hole 510 for movably penetrating the corresponding connecting rod 350 and a movable hole 520 for movably penetrating the movable plate 330, when in installation, the connecting rod 350 is required to pass through the corresponding directional block 500 through the guide hole 510, the pressing head 360 is arranged on the corresponding connecting rod 350, the movable plate 330 is inserted into the corresponding movable hole 520, then the directional block 500 is in threaded connection with the pressure compensating assembly 400, the bump 331 is elastically connected with the pressure compensating assembly 400, and then the pressure compensating assembly 400 is in threaded connection with the corresponding template 200, therefore, when the upper template 210 drives the upper connecting rod 351 and the upper pressing head 361 to press magnetic materials through the pressure compensating assembly 400 and the directional block 500, each movable plate 330 is all pressure compensating assembly 400, the orientation block 500 limits the upper connecting rods 351 from moving in a staggered manner, so that the acting force acting on the pressure compensating assembly 400 can be equally distributed to each upper connecting rod 351 and the corresponding upper pressure head 361, namely, the orientation block 500 restrains the acting direction of the acting force acting on the connecting rod 350, and therefore, the pressed green bodies are identical in shape and size.
The pressure compensating assembly 400 comprises a protection block 410, a protection hole 411 is formed in the protection block 410, a spring 420 is arranged in the protection hole 411, one end of the spring 420 abuts against the bottom end of the protection hole 411, the other end of the spring 420 abuts against a lug 331, the protection block 410 is detachably connected with the orientation block 500, when the protection block 410 is in threaded connection with the orientation block 500, the lug 331 is inserted into the corresponding protection hole 411, and the lug 331 is in extrusion connection with the spring 420, so that certain elastic force is achieved between the lug 331 and the protection block 410, namely, certain elastic force is achieved between the pressure head 360 and the protection block 410, namely, elastic connection between the pressing assembly 300 and the corresponding template 200 is achieved, because the magnetic material is subjected to pressure between the upper pressure head 361 and the lower pressure head 362 in the green body pressing process, and the pressure between the upper pressure head 361 and the lower pressure head 362 is likely to change in the green body demoulding process, and the utility model discloses a pressure head 360 and protection piece 410 between have elasticity, this elasticity can compensate the pressure differential that changes between pressure head 361 and the lower pressure head 362 to make the unburned bricks can adapt to its pressure that receives when the drawing of patterns, thereby ensure its integrality at the drawing of patterns in-process.
Example two
As shown in fig. 2 and fig. 3, the present embodiment is different from the first embodiment in that: one pressing assembly 300 is elastically connected with the corresponding template 200 through the pressure supplementing assembly 400, and the other pressing assembly 300 is connected with the corresponding template 200 through the fixing block 600.
Specifically, the utility model discloses at most a suppression subassembly 300 is connected through fixed block 600 with corresponding template 200, and is preferred, and this embodiment adopts a suppression subassembly 300 to be connected through fixed block 600 with corresponding template 200.
Each connecting rod 350 is fixedly connected with the fixed block 600 or each connecting rod 350 is detachably connected with the fixed block 600, when the connecting rod 350 is detachably connected with the fixed block 600, threads are arranged at one ends of the connecting rod 350 and the fixed block 600, during installation, the end, with the threads, of the connecting rod 350 is in threaded connection with the fixed block 600, and when the connecting rod 350 is fixedly connected with the fixed block 600, the connecting rod 350 and the fixed block 600 are integrally formed or the connecting rod 350 and the fixed block 600 are welded.
The fixed block 600 is detachably connected with a pressing plate 610 for fixing the connecting rods 350, each connecting rod 350 penetrates through the pressing plate 610, when the connecting rods 350 are installed on the fixed block 600, the pressing plate 610 is in threaded connection with the fixed block 600, and each connecting rod 350 penetrates through the pressing plate 610, the pressing plate 610 is equivalent to the above-mentioned orientation block 500, when the pressing assembly 300 is used for pressing magnetic materials, the pressing plate 610 limits the connecting rods 350 to perform dislocation movement, so that acting forces acting on the template 200 and the fixed block 600 can be evenly distributed to each connecting rod 350 and the corresponding pressing head 360, namely, the pressing plate 610 restrains the acting direction of the acting forces acting on the connecting rods 350, and therefore the shapes and the sizes of pressed green bodies are the same.
EXAMPLE III
As shown in fig. 1 to 3, the present embodiment is a pressing method for a forming die for a magnetic material, including the steps of:
s1, moving the lower template 220 so that the lower pressure head 362 on the lower template 220 is inserted into the corresponding mold cavity 110;
s2, filling the magnetic material into each mold cavity 110, and keeping the weight of the magnetic material filled into the mold cavity 110 within a certain range;
s3, moving the upper mold plate 210 so that the upper ram 361 and the corresponding upper connecting rod 351 are inserted into the corresponding mold cavity 110 until the upper ram 361 and the corresponding lower ram 362 in each mold cavity 110 press the magnetic material into a green body, wherein the upper ram 361 is pushed into the mold cavity 110 to a depth based on the mold cavity 110 with the smaller weight of the magnetic material during pressing, that is, one selects the mold cavity 110 with the least magnetic material according to the weight of the magnetic material in each mold cavity 110, and then presses the magnetic material in each mold cavity 110 based on the mold cavity 110 until the pressing density of the magnetic material in the mold cavity 110 with the smaller weight of the magnetic material reaches the standard density of the green body, the upper mold plate 210 stops moving, that is, the upper ram 361 and the lower ram 362 stop pressing;
s4, moving the two mold plates 200 along the axial direction of the mold cavity 110 at the same speed, that is, the upper ram 361 and the lower ram 362 along the axial direction of the mold cavity 110 at the same speed, and in the process, because the upper pressing assembly 310 is elastically mounted on the upper mold plate 210 by the pressure compensating assembly 400, the lower pressing assembly 320 is also elastically mounted on the lower mold plate 220 by the pressure compensating assembly 400, or the upper pressing assembly 310 is elastically mounted on the upper mold plate 210 by the pressure compensating assembly 400, and the lower pressing assembly 320 is mounted on the lower mold plate 220 by the fixing block 600, when a pressure difference is generated between the upper ram 361 and the lower ram 362, the elastic force generated between the pressure compensating assembly 400 and the corresponding pressing assembly 300 can compensate the pressure difference which is changed between the upper ram 361 and the lower ram 362, so that the green compacts in each mold cavity are subjected to the pressure of the upper ram or the lower ram during the demolding process, and the pressure difference generated by the upper pressure head and the lower pressure head to the green body is reduced to form protective demoulding, so that the green body can adapt to the pressure applied to the green body during demoulding, in other words, the green body pressed by more magnetic materials can be pressed by the extrusion force between the upper pressure head 361 and the lower pressure head 362, the elastic force of the pressure supplementing assembly 400 can balance the extrusion force between the upper pressure head 361 and the lower pressure head 362, so that the green body pressed by more magnetic materials cannot be damaged due to the overlarge extrusion force between the upper pressure head 361 and the lower pressure head 362, secondly, the green body pressed by less magnetic materials can be pressed by the undersize extrusion force between the upper pressure head 361 and the lower pressure head 362 or the extrusion force between the upper pressure head 361 and the lower pressure head 362 does not exist, and the elastic force of the pressure supplementing assembly 400 can compensate the extrusion force between the upper pressure head 361 and the lower pressure head 362, so that the green body pressed by less, thereby ensuring the integrity of the green body during the demolding process so that the green body in the mold cavity 110 can be smoothly released from the corresponding mold cavity 110.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A molding die for a magnetic material, comprising:
the pressing die is internally provided with at least one die cavity; the two sides of each pressing die are movably provided with templates, each template is provided with a pressing assembly for pressing a magnetic material into a corresponding die cavity, at least one pressing assembly is elastically connected with the corresponding template through a pressure supplementing assembly, the pressure supplementing assembly is provided with an orientation block for directionally moving the corresponding pressing assembly, and at least one pressing assembly is connected with the corresponding template through a fixing block.
2. The forming die for a magnetic material as claimed in claim 1, wherein each pressing assembly includes a pressing head and a connecting rod, and the pressing head is detachably connected to one end of the corresponding connecting rod.
3. The forming die for the magnetic material as claimed in claim 2, wherein a movable plate is provided at an end of the connecting rod away from the pressing head, the movable plate has a cross-sectional area larger than that of the connecting rod, and a protrusion is provided on the movable plate.
4. The molding die for magnetic materials as claimed in claim 3, wherein the orientation block is provided therein with a guide hole for movably penetrating the corresponding connecting rod and a movable hole for movably penetrating the movable plate.
5. The forming die for the magnetic material as claimed in claim 4, wherein the pressure compensating assembly comprises a protection block, a protection hole is formed in the protection block, a spring is arranged in the protection hole, one end of the spring abuts against the bottom end of the protection hole, the other end of the spring abuts against the protruding block, and the protection block is detachably connected with the orientation block.
6. The molding die for magnetic materials as claimed in claim 2, wherein each of the connecting rods is fixedly connected with the fixing block or each of the connecting rods is detachably connected with the fixing block.
7. The molding die for magnetic materials as claimed in claim 6, wherein the fixing block is detachably connected with a pressing plate for fixing the connecting rods, and each connecting rod passes through the pressing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020099878.6U CN211758451U (en) | 2020-01-16 | 2020-01-16 | Forming die for magnetic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020099878.6U CN211758451U (en) | 2020-01-16 | 2020-01-16 | Forming die for magnetic material |
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| Publication Number | Publication Date |
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| CN211758451U true CN211758451U (en) | 2020-10-27 |
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| CN202020099878.6U Active CN211758451U (en) | 2020-01-16 | 2020-01-16 | Forming die for magnetic material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116638071A (en) * | 2023-07-26 | 2023-08-25 | 包头天石稀土新材料有限责任公司 | Auxiliary demolding jig and neodymium-iron-boron magnet pressing device and method |
-
2020
- 2020-01-16 CN CN202020099878.6U patent/CN211758451U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116638071A (en) * | 2023-07-26 | 2023-08-25 | 包头天石稀土新材料有限责任公司 | Auxiliary demolding jig and neodymium-iron-boron magnet pressing device and method |
| CN116638071B (en) * | 2023-07-26 | 2023-10-31 | 包头天石稀土新材料有限责任公司 | Auxiliary demolding jig and neodymium-iron-boron magnet pressing device and method |
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