CN202963452U - Composite die - Google Patents
Composite die Download PDFInfo
- Publication number
- CN202963452U CN202963452U CN 201220671820 CN201220671820U CN202963452U CN 202963452 U CN202963452 U CN 202963452U CN 201220671820 CN201220671820 CN 201220671820 CN 201220671820 U CN201220671820 U CN 201220671820U CN 202963452 U CN202963452 U CN 202963452U
- Authority
- CN
- China
- Prior art keywords
- die
- die body
- pressure head
- material layer
- graphite material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
The utility model discloses a composite die which comprises a die body, an upper pressure head and a lower pressure head. The composite die is characterized in that the die body is in an integrated structure. The inner side and the outer side of the die body, the inner side and the outer side of the upper pressure head and the inner side and the outer side of the lower pressure head are made of different materials, especially, the outer side of the die body, the outer side of the upper pressure head and the outer side of the lower pressure head are made of permeability magnetic materials, and inner side of the die body, the inner side of the upper pressure head and the inner side of the lower pressure head are made of graphite materials. Due to the fact that high strength graphite is adopted, not only can the service life of the die be prolonged significantly, but also the molding percent of pass of permanent magnet material blank products is improved, the requirements for surface accuracy and smooth finish of the blank products are met, and pressing cost is lowered.
Description
Technical field
The utility model relates to a kind of composite die, particularly a kind of composite die that uses for the compressing operation of permanent-magnet material.
Background technology
In the production process that adopts powder metallurgical technique production permanent-magnet material, generally comprise powder process-die mould-operations such as sintering, for obtaining the permanent magnetism of product, micro mist need to be placed in mould by the compressing pressed compact product that obtains of magnetic field orientating, mould is for the magnetic property important of Forming Quality and the final magnet of pressed compact product in this process.
Generally adopt at present the perpendicular magnetic field orientation moulding press, be that the magnetic field orientating direction is vertical with pressing direction, electromagnet is fixed on the press operation platform, and two groups of coil left-right symmetry distribute, pressure head is in upper-lower position, mould be installed on mould bases and with left and right electromagnet cartridge close contact.One mold is usually by upper and lower pressure head, and magnetic conductive board and side plate etc. form.
In compressing operation process, Magnaglo along the direction of easy axis orientation, therefore requires mould to adopt permeability magnetic material on differently-oriented directivity under the effect of high-intensity magnetic field, and can adopt non-magnetic material on other direction.When using traditional nonmagnetic steel (as 1Cr18Ni9Ti, 70Mn, 9Mn9 etc.) to make the mould of Magnaglo, its poor-performing, hardness HRC only has 34～47, service life is short, and the serious plucking of die wall after use a period of time, the sticking powder of die cavity distortion has had a strong impact on dimensional accuracy and the surface quality of blank, thereby has strengthened the stock removal of follow-up blank product, improved cost greatly.
The patent application of CN20102051339.6 has provided and has improved the method that the cylinder mould evenly is orientated the field, improve the wearability of hardness and die cavity by the magnetic conduction bar (the HRC value is 55) after embedding heat treatment, the improvement of part hardness and the wearability in mold work zone, yet this patent does not obviously shorten from solving in essence die cavity distortion, service life, the pressed compact precision is significantly descended a series of fundamental issues that relate to mould of degradation.The CN201010207390.1 patent application has provided a kind of shaped device of NdFeB material, the rubber pattern that the NdFeB powder is housed is placed in is orientated again compacting in metal die, this method has proposed very high requirement to the packing density of alignment magnetic field (being electromagnet apparatus) and powder, and production efficiency is lower; And the service life of rubber mold is shorter, and this method also is unfavorable for controlling dimensional accuracy and the surface quality of blank simultaneously.
The utility model content
The purpose of this utility model has been to provide a kind of composite die, it adopts high strength graphite, not only makes the life-span of mould significantly improve, and can also improve the moulding qualification rate of permanent-magnet material blank product, improve surface accuracy and the fineness requirement of blank product, reduced pressing cost.
A kind of composite die, it comprises die body and upper push-down head, it is characterized in that: described die body is integral structure, the medial and lateral of die body and upper push-down head are made of different materials.
Preferably, the outside of described die body and upper push-down head is permeability magnetic material, and the inboard is graphite material.
Preferably, the thickness range of the inboard graphite material layer of described die body and upper push-down head is 5～30mm.
Preferably, the range of friction coefficients of described graphite material layer and powder contact-making surface is 0.04～0.1.
Preferably, the fineness scope of described graphite material layer and powder contact-making surface is＞0.4.
Preferably, the thermal coefficient of expansion scope of described graphite material layer is (0.5～3) x10
-6K
-1
Preferably, the Moh's scale number scope of described graphite material layer is 1～3.
Preferably, the range of friction coefficients of described die body mould intracavity wall is 0.04～0.1.
Preferably, the fineness value scope of described die body mould intracavity wall is＞0.4.
Preferably, the thermal coefficient of expansion scope of described die body mould intracavity wall is (0.5～3) x10
-6K
-1, the Moh's scale number scope is 1～3.
Design of Dies of the present utility model combines the high strength graphite material with permeability magnetic material, because the thermal coefficient of expansion of graphite is little, and the intensity of graphite is strengthened along with the rising of temperature, so mould is out of shape very littlely in pressing process, and the life-span of mould is able to remarkable increase; The dimensional accuracy of pressed compact product is effectively guaranteed simultaneously, has saved the powder materials of suppressing same pressed compact.Because graphite has good self lubricity, make that the frictional force between powder and mould intracavity wall, pressure head reduces in pressing process, effectively guaranteed the fineness requirement of pressed compact product, improved the surface quality of blank, after the pressed compact product sintering of suppressing, the amount of double-side grinding has reduced by 30% left and right.Adopt the graphite composite die can also adjust the magnetic circuit state of powder in die cavity, improved the uniformity in magnetic field in the mould, improved the magnetic declination of magnet, and then made the magnetic property uniformity of blank product improve 10% left and right.What simultaneously this high strength graphite composite die of the present utility model adopted is the integral type die body, has guaranteed the assembly precision of mould and the precision in pressing process, can improve significantly the ratio of briquetting of pressed compact product, the appearance of the phenomenons such as the layering that prevents from ftractureing.
Description of drawings
Figure 1A is the die body structural representation of the utility model mould;
Figure 1B is the pressure head structure schematic diagram of the utility model mould;
But Fig. 2 A is the die body schematic top plan view of the utility model pressing block shape product mold;
Fig. 2 B is the die body D-D cross-sectional view that the utility model can be suppressed the shape product mold;
But Fig. 2 C is the pressure head structure schematic diagram of the utility model pressing block shape product mold;
Fig. 3 A is the die body schematic top plan view that the utility model can be suppressed the cylindrical product mould;
Fig. 3 B is the die body D-D cross-sectional view that the utility model can be suppressed the cylindrical product mould;
Fig. 3 C is the pressure head structure schematic diagram that the utility model can be suppressed the cylindrical product mould;
Fig. 4 A is the die body schematic top plan view that the utility model can be suppressed trapezoidal product mold;
Fig. 4 B is the die body D-D cross-sectional view that the utility model can be suppressed trapezoidal product mold;
Fig. 4 C is the pressure head structure schematic diagram that the utility model can be suppressed trapezoidal product mold.
The specific embodiment
Composite die of the present utility model is comprised of die body and upper and lower die head, and wherein die body is different from the structure of detachable in the past, is integral type, can not dismantle assembly unit, this structure makes the assembling of mould easier, and more easily guarantees the compacting precision of blank, as shown in Figure 1A.That side that the inboard of die body refers to form die cavity and contacts with the compacting powder, that corresponding side is the outside.The integral type die body is made of permeability magnetic material and the inboard graphite material in the outside, and die body is penetration type simultaneously, and upper and lower pressure head all need enter die cavity in the blank pressing process.The structure of upper and lower pressure head as shown in Figure 1B, it is the inboard with that side of contact of compacting powder, that corresponding side is the outside.Upper and lower pressure head is made of permeability magnetic material and graphite material equally, and its inboard is graphite material.
The thickness range of the graphite material layer that the utility model adopts is 5～30mm, and range of friction coefficients is 0.04～0.1, and the thermal coefficient of expansion scope is (0.5～3) * 10
-6K
-1, the Moh's scale number scope is 1～3, fineness value scope is＞0.4.Therefore the graphite material layer surface of the formed mould intracavity wall of graphite material layer and pressure head all has above-mentioned identical performance parameter.
Composite die of the present utility model need of production is as required adjusted, and the product of the various shape and size of compacting is as piece shape product, cylindrical product, trapezoidal product and other shape products etc.
Describe below in conjunction with the concrete structure of specific embodiment to composite die of the present utility model.
In following examples and Comparative Examples, magnetic powder materials composition used, powder size size, pressing process etc. are in full accord, and just mould used is different in forming process.
Embodiment 1:
Fig. 2 A, 2B, 2C are the structural representations of the mould of pressing block shape product, and 1 is die cavity as shown in the figure, and 2 is the graphite material layer, and 3 is magnetic conductive material layer.Die body is made of the magnetic conductive material layer in the outside and the thick graphite material layer of inboard 5mm, and upper and lower pressure head also is made of permeability magnetic material and graphite material, and its graphite material layer thickness that contact with the compacting powder is also 5mm.The range of friction coefficients of graphite material layer is 0.04～0.1, and the thermal coefficient of expansion scope is (0.5～3) * 10
-6K
-1, the Moh's scale number scope is 1～3, fineness value scope is＞0.4.The NdFeB micro mist is poured in the die cavity of mould, then carried out the matched moulds orientation, upper and lower shape product pressure head enters and carries out two-way compacting in die cavity subsequently, then demagnetization, and the seaming chuck backhaul, push-down head ejects the pressed compact demoulding.Pressed compact is carried out obtaining after the sintering timeliness sintering blank (this blank after mill processing six meet personally light size setting value be 56x40x30mm).Measure size and the magnetic property of sintering blank, data see Table 1.Wherein the Br uniformity refers to: randomly draw 30 blank sample in measurements its Br value, the maximum of measured Br and the scope of minimum of a value.
Comparative Examples 1:
The NdFeB micro mist is poured in the die cavity of the geomery traditional moulds identical with embodiment 1, then carried out the matched moulds orientation, upper and lower shape product pressure head enters and carries out two-way compacting in die cavity subsequently, then demagnetization, and the seaming chuck backhaul, push-down head ejects the pressed compact demoulding.Pressed compact is carried out obtaining after the sintering timeliness sintering blank (this blank after mill processing six meet personally light size setting value be 56x40x30mm).Measure size and the magnetic property of sintering blank, data see Table 1.
Table 1
Embodiment 2:
Fig. 3 A, 3B, 3C are the structural representations of the mould of compacting cylindrical product, and 1 is die cavity as shown in the figure, and 2 is the graphite material layer, and 3 is magnetic conductive material layer.Die body is made of the magnetic conductive material layer in the outside and the thick graphite material layer of inboard 10mm, and upper and lower pressure head also is made of permeability magnetic material and graphite material, and its graphite material layer thickness that contact with the compacting powder is also 10mm.The range of friction coefficients of graphite material layer is 0.04～0.1, and the thermal coefficient of expansion scope is (0.5～3) * 10
-6K
-1, the Moh's scale number scope is 1～3, fineness value scope is＞0.4.The NdFeB micro mist is poured in the die cavity of mould, then carried out the matched moulds orientation, upper and lower shape product pressure head enters and carries out two-way compacting in die cavity subsequently, then demagnetization, and the seaming chuck backhaul, push-down head ejects the pressed compact demoulding.Pressed compact is carried out obtaining sintering blank (this blank sees that after mill processing light size setting value is D18x32mm) after the sintering timeliness.Measure size and the magnetic property of sintering blank, data see Table 2.
Comparative Examples 2:
The NdFeB micro mist is poured in the die cavity of the geomery mould identical with embodiment 2, then carried out the matched moulds orientation, upper and lower shape product pressure head enters and carries out two-way compacting in die cavity subsequently, then demagnetization, and the seaming chuck backhaul, push-down head ejects the pressed compact demoulding.Pressed compact is carried out obtaining sintering blank (this blank sees that after mill processing light size setting value is D18x32mm) after the sintering timeliness.Measure size and the magnetic property of sintering blank, data see Table 2.
Table 2
Embodiment 3:
Fig. 4 A, 4B, 4C are the structural representations of the mould of the trapezoidal product of compacting, and 1 is die cavity as shown in the figure, and 2 is the graphite material layer, and 3 is magnetic conductive material layer.Die body is made of the magnetic conductive material layer in the outside and the thick graphite material layer of inboard 30mm, and upper and lower pressure head also is made of permeability magnetic material and graphite material, and its graphite material layer thickness that contact with the compacting powder is also 30mm.The range of friction coefficients of graphite material layer is 0.04～0.1, and the thermal coefficient of expansion scope is (0.5～3) * 10
-6K
-1, the Moh's scale number scope is 1～3, fineness value scope is＞0.4.The NdFeB micro mist is poured in the die cavity of mould, then carried out the matched moulds orientation, upper and lower shape product pressure head enters and carries out two-way compacting in die cavity subsequently, then demagnetization, and the seaming chuck backhaul, push-down head ejects the pressed compact demoulding.Pressed compact is carried out obtaining after the sintering timeliness sintering blank, and (this blank sees that after mill processing light size setting value is 70x44x32x18mm, 44mm is that the upper base of trapezoidal product is long, 70mm is the length of going to the bottom of trapezoidal product, and 32mm is the chord length of trapezoidal product, and 18mm is the thickness of trapezoidal product).Measure size and the magnetic property of sintering blank, data see Table 3.
Comparative Examples 3:
The NdFeB micro mist is poured in the die cavity of the geomery mould identical with embodiment 2, then carried out the matched moulds orientation, upper and lower shape product pressure head enters and carries out two-way compacting in die cavity subsequently, then demagnetization, and the seaming chuck backhaul, push-down head ejects the pressed compact demoulding.Pressed compact is carried out obtaining sintering blank (this blank sees that after mill processing light size setting value is 70x44x32x18mm) after the sintering timeliness.Measure size and the magnetic property of sintering blank, data see Table 3.
Table 3
The above is only several limited specific embodiment of the present utility model, and composite die of the present utility model is also applicable to the product of other various shapes.
Claims (10)
1. composite die, it comprises die body and upper push-down head, it is characterized in that: described die body is integral structure, the medial and lateral of die body and upper push-down head are made of different materials.
2. composite die as claimed in claim 1, it is characterized in that: the outside of described die body and upper push-down head is permeability magnetic material, the inboard is graphite material.
3. composite die as claimed in claim 2 is characterized in that: the thickness range of the inboard graphite material layer of described die body and upper push-down head is 5～30mm.
4. composite die as claimed in claim 2, it is characterized in that: the range of friction coefficients of described graphite material layer and powder contact-making surface is 0.04～0.1.
5. composite die as claimed in claim 2, it is characterized in that: the fineness scope of described graphite material layer and powder contact-making surface is＞0.4.
6. composite die as claimed in claim 2 is characterized in that: the thermal coefficient of expansion scope of described graphite material layer is (0.5～3) x10
-6K
-1
7. composite die as claimed in claim 2, it is characterized in that: the Moh's scale number scope of described graphite material layer is 1～3.
8. composite die as claimed in claim 1, it is characterized in that: the range of friction coefficients of described die body mould intracavity wall is 0.04～0.1.
9. composite die as claimed in claim 1, it is characterized in that: the fineness value scope of described die body mould intracavity wall is＞0.4.
10. composite die as claimed in claim 1 is characterized in that: the thermal coefficient of expansion scope of described die body mould intracavity wall is (0.5～3) x10
-6K
-1, the Moh's scale number scope is 1～3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220671820 CN202963452U (en) | 2012-12-07 | 2012-12-07 | Composite die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220671820 CN202963452U (en) | 2012-12-07 | 2012-12-07 | Composite die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202963452U true CN202963452U (en) | 2013-06-05 |
Family
ID=48504582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220671820 Expired - Fee Related CN202963452U (en) | 2012-12-07 | 2012-12-07 | Composite die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202963452U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846435A (en) * | 2012-12-07 | 2014-06-11 | 三环瓦克华（北京）磁性器件有限公司 | Combined mold |
| CN105081317A (en) * | 2015-09-18 | 2015-11-25 | 北京京磁电工科技有限公司 | Multiple-cavity mould |
-
2012
- 2012-12-07 CN CN 201220671820 patent/CN202963452U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103846435A (en) * | 2012-12-07 | 2014-06-11 | 三环瓦克华（北京）磁性器件有限公司 | Combined mold |
| CN103846435B (en) * | 2012-12-07 | 2018-09-18 | 三环瓦克华（北京）磁性器件有限公司 | A kind of composite die |
| CN105081317A (en) * | 2015-09-18 | 2015-11-25 | 北京京磁电工科技有限公司 | Multiple-cavity mould |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101961787B (en) | Neodymium iron boron (NdFeB) die for forming uniform oriented magnetic field | |
| CN106493360B (en) | The compacting tool set of neodymium iron boron magnetic body | |
| CN101850421B (en) | Molding device for NdFeB materials | |
| CN103846435B (en) | A kind of composite die | |
| CN201659277U (en) | Novel motor case casting mold | |
| CN104966605A (en) | Forming process of sintered NdFeB tegular magnet and modular mold thereof | |
| CN202861399U (en) | Combined type neodymium iron boron mold device | |
| CN202963452U (en) | Composite die | |
| CN201760594U (en) | NdFeB molding die with uniform orientation magnetic field | |
| CN203109227U (en) | Novel full-automatic forming mold for neodymium iron boron materials | |
| CN203649402U (en) | Die of magnetic-field formed square billets for sintering neodymium iron boron | |
| CN102962449A (en) | Magnetic material powder forming device and method | |
| CN218362085U (en) | Pressing forming device for processing sintered neodymium-iron-boron permanent magnet | |
| CN203018744U (en) | Prismatic center pillar ri-shaped magnetic core forming mould | |
| CN112053843B (en) | Forming and mould pressing method for large-size sintered neodymium iron boron blank | |
| CN101582611A (en) | One-step forming process for sintered NdFeB permanent magnet of motor and mould thereof | |
| CN210121680U (en) | Neodymium iron boron magnetism body forming process device | |
| CN203900354U (en) | Auxiliary device for producing U-shaped forging through titanium alloy | |
| CN203578762U (en) | Neodymium-iron-boron die with novel upper-lower stamping fixing structure | |
| CN207695622U (en) | A kind of shaper preparing magnet | |
| CN205904304U (en) | Bottom plate assembly fixing device | |
| CN201720426U (en) | Molding device of neodymium iron boron material | |
| CN213410314U (en) | Magnetic steel forming die | |
| CN203875334U (en) | Bonded NdFeB magnetic shoe double-cavity mold | |
| CN201950211U (en) | Hot pressing die |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130605 Termination date: 20201207 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |