CN204657472U - The pre-pressing die of the hot-forming goods of metal dust - Google Patents
The pre-pressing die of the hot-forming goods of metal dust Download PDFInfo
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- CN204657472U CN204657472U CN201520346974.5U CN201520346974U CN204657472U CN 204657472 U CN204657472 U CN 204657472U CN 201520346974 U CN201520346974 U CN 201520346974U CN 204657472 U CN204657472 U CN 204657472U
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- 238000003825 pressing Methods 0.000 title claims abstract description 61
- 239000002184 metal Substances 0.000 title claims abstract description 23
- 239000000428 dust Substances 0.000 title claims abstract description 17
- 238000012856 packing Methods 0.000 claims abstract description 17
- 239000000758 substrate Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 238000003475 lamination Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 15
- 239000000843 powder Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000004663 powder metallurgy Methods 0.000 description 6
- 238000004512 die casting Methods 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 238000005245 sintering Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 239000012255 powdered metal Substances 0.000 description 3
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- IXSZQYVWNJNRAL-UHFFFAOYSA-N etoxazole Chemical compound CCOC1=CC(C(C)(C)C)=CC=C1C1N=C(C=2C(=CC=CC=2F)F)OC1 IXSZQYVWNJNRAL-UHFFFAOYSA-N 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 238000009747 press moulding Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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- Press Drives And Press Lines (AREA)
Abstract
Utility model discloses the pre-pressing die of the hot-forming goods of a kind of metal dust, comprise mould frame, be provided with template in mould frame, on described mould frame, perforation is provided with adjustment clamping element, regulating clamping element through mould frame end effect template, compressing template by regulating clamping element.By pre-pressing die of the present utility model, form assembly forms packing cavity, in packing cavity, cold moudling is carried out to metal dust, side is by regulating clamping elements press template, top is exerted a force by press device, extrude the various bubble-shaped adults of article shaped inside in packing cavity, obtain uniform quality, pressed compact without lamination.
Description
Technical field
The utility model belongs to powder metallurgy forming technical field, particularly a kind of metal dust hot-forming before, metal dust is carried out to the pre-pressing die of pre-molding.
Background technology
Powder metallurgy adopts the mixture of metal dust or metal dust and non-metal powder as raw material, through powder compacting → sintering → shaping, and a kind of novel metal forming technique of manufacture metallic article.The process chipless of PM technique, stock utilization is high, clean and effective, and production cost is low, can manufacture various baroque fabricated product.Usually, adopt general casting method energy ezpenditure to reach 80%, and produce the loss of metallic article with powder metallurgy process and only have 1% ~ 5%, and can the goods of high-purity.In batch production process, also can strict production control line accurately, make the size of powdered metal parts obtain very high precision and uniformity.
Wherein, powder compacting is one of master operation of powder metallurgy, and powder moulding mold design is the important step of powder compacting, and it is related to the problems such as the quality of sintered metal product and production cost, security, productivity ratio and automation.Along with powder compacting technology is in the fast development in the fields such as automobile, household electrical appliances, Aero-Space, light industry, the rigidity of the mould that powder metallurgy precision is shaping, precision and complexity it is also proposed higher requirement.
In the pressing process of powder compacting, due to reasons such as raw material, Element Design, Design of Dies, former frock, mould assembling, pressing process, cause powder metallurgy pressing part (pressed compact) defect, finally cause powdered metal parts batch to be scrapped.Common pressed compact defect has: green density is uneven, layering, crackle, fall limit arrisdefect, burr is excessive, surface tear, axiality are poor.The generation of defect is hard to guard against, even if the product produced for many years also likely can occur defect, thus causes goods batch to be scrapped.These problem long-standing problem sintered metal product enterprise.
Existing most of press-moulding die, is all exerted pressure to its up and down or left and right by die casting machine, makes pre-pressing die powder inside shaping.Direction of exerting pressure is determined by die casting machine, relatively single, and pre-pressing die can not realize the precompressed in other directions except die casting machine direction of exerting pressure.Due to the unidirectional precompressed of die casting machine, cause to compress slab side, be unfavorable for the discharge of bubble, occur the even lamination of the density unevenness of slab simultaneously.
Utility model content
In view of the shortcoming of above-mentioned prior art, the purpose of this utility model is the pre-pressing die providing the hot-forming goods of a kind of metal dust, realize the self-locking precompressed of mould, make the pressed compact of pre-pressing die at the direction pressurized except die casting machine direction of exerting pressure and adjustable, obtain the high-quality pressed compact of bubble-free, uniform quality.
For achieving the above object and other relevant objects, the utility model provides the pre-pressing die of the hot-forming goods of a kind of metal dust, comprise mould frame, backup plate and at least one group of pressing plate is provided with in mould frame, described backup plate is positioned at the outside of pressing plate, often organize pressing plate and comprise top board and lower platen, form packing cavity between described top board and lower platen, between described backup plate and mould frame, be provided with adjustment clamping element.Fill metal dust in packing cavity, top is compressed by impressed pressure equipment force by top board, and side regulates the distance clamped between element end and backup plate by adjustment, compresses backup plate, makes the side of packing cavity compacted.By pre-pressing die of the present utility model, form assembly forms packing cavity, in packing cavity, cold moudling is carried out to metal dust, side is by regulating clamping elements press template, top is exerted a force by press device, extrude the various bubble-shaped adults of article shaped inside in packing cavity, obtain uniform quality, pressed compact without lamination.
As preferably, mould frame is the rectangle frame surrounded by four blocks of side plates.The pressure equalization of side falls apart on mould frame, the rigid structure that mould frame is integrated, and by the pressing plate of inside, backup plate and following dividing plate banding, can not produce distortion, ensure shape and the surface quality of pressed compact due to the extruding of fastening bolt and press device.
As preferably, described adjustment clamping element is arranged in two pieces of adjacent side plates of mould frame.Adjacent two faces of mould frame are evenly provided with adjustment clamping element, regulate two backup plates that clamping element effect is corresponding, remain two backup plates and directly located by the inwall of mould frame.Be arranged on adjacent position, ensure that packing cavity both direction is extruded and adjusts.
As preferably, described adjustment clamping element is made up of the fastening bolt be threaded on mould frame.Described adjustment clamping element is coordinated with mould frame by screw thread.Advanced by screw thread and regulate clamping element, structure is simple, and mechanical operation is convenient, is also convenient to control to advance precision.Also the propelling of other control and regulation clamping elements can be adopted.
As preferably, described pressing plate is provided with at least 2 groups, is isolated between adjacent pressing plates by dividing plate.Owing to regulating the controllability of clamping element, can be provided with in mould frame and organize pressing plate more, according to processing needs, multiple pressed compact can be suppressed simultaneously, improve working (machining) efficiency.
As preferably, the side of described packing cavity is surrounded by the adjacent backup plate of top board, lower platen and (or) dividing plate.
As preferably, the upper surface of described top board is higher than the upper surface of described mould frame, backup plate upper surface and dividing plate upper surface.Ensure that the upper surface of top board is positioned at mould highest order after filler, when avoiding press device to exert pressure to top board, interfered by miscellaneous part, cannot process, mold damage.
As preferably, also comprise substrate, described mould frame is arranged on substrate.Substrate is provided with in advance the locating hole of corresponding backup plate, dividing plate, lower lock block, position, hole size is slightly larger than pressing plate, is convenient to adjust position.
As preferably, described dividing plate adopts high-quality carbon element structural steel to make.
As preferably, described backup plate adopts cold work die steel to make.
As mentioned above, adopt the pre-pressing die of the hot-forming goods of metal dust of the present utility model, there is following beneficial effect:
1. by pre-pressing die of the present utility model, cold moudling is carried out to metal dust, extrude the various bubble-shaped adults of article shaped inside in packing cavity.
2. use metal die, be convenient to repeated multiple times use, multiple pressed compact can be suppressed simultaneously, improve working (machining) efficiency.
3. adopt cold-press process, save the consumption of hot pressing die, suppress the oxidation of pressed compact.
Accompanying drawing explanation
Fig. 1 is the structural representation of the pre-pressing die of the utility model embodiment.
Fig. 2 is the cross-sectional schematic of the pre-pressing die of the utility model embodiment.
Fig. 3 is the operating diagram of the pre-pressing die of the utility model embodiment.
Piece mark explanation
1-mould frame,
11-first side plate,
12-second side plate,
13-the 3rd side plate,
14-the 4th side plate,
2-fastening bolt,
3-compresses backup plate,
31-first backup plate,
32-second backup plate,
33-the 3rd backup plate,
34-the 4th backup plate,
4-pressing plate,
41-top board,
42-lower platen,
5-packing cavity,
6-dividing plate,
7-substrate.
Detailed description of the invention
By particular specific embodiment, embodiment of the present utility model is described below, person skilled in the art scholar the content disclosed by this description can understand other advantages of the present utility model and effect easily.
In order to can the utility model be described in detail, first, next the pre-pressing die of the hot-forming goods of metal dust of the present utility model is illustrated:
See accompanying drawing 1, pre-pressing die of the present utility model comprises mould frame 1, and mould frame 1 comprises four side plates, is the first side plate 11, second side plate 12 respectively, the 3rd side plate 13 and the 4th side plate 14, four side plates surround a rectangle frame.4 side plates wherein two adjacent side plates are provided with installing hole, installing hole coordinates and regulates clamping element, the adjustment clamping element of the present embodiment adopts fastening bolt 2, and fastening bolt 2 is coordinated with mould frame 1 by screw thread, and other also can be adopted on mould frame can to realize the adjustment clamping element advanced.The end effect backup plate 3 of fastening bolt 2, by rotational fastener bolt 2, makes the end of fastening bolt 2 exert a force to backup plate 3, and compresses backup plate.First side plate 11 of the mould frame 1 of the present embodiment is provided with 4 fastening bolts, is arranged in the middle of the first side plate in the mode of 2x2, and the 4th side plate 14 is provided with 6 fastening bolts, is arranged in the middle of the 4th side plate in the mode of 2x3.
Be provided with template in mould frame 1, template comprises backup plate and pressing plate.Wherein, being respectively equipped with 4 backup plates 3 near four side plates, is the first backup plate 31, second backup plate 32, the 3rd backup plate 33 (see Fig. 2) and the 4th backup plate 34 respectively.4 backup plates be arranged in parallel with 4 side plates respectively, end direct effect first backup plate 31 surface of the fastening bolt 2 wherein on the first side plate 11.End direct effect the 4th backup plate 34 surface of the fastening bolt 2 on the 4th side plate 14.
See Fig. 2, be provided with at least one group of pressing plate 4 between four backup plates, often organize pressing plate 4 and comprise top board 41 and lower platen 42, above lower platen 42, correspondence is provided with top board 41, forms packing cavity 5 between top board 41 and lower platen 42.When pressing plate 4 arrange 2 groups and above time, often organize between pressing plate 4 and be provided with dividing plate 6.The present embodiment pressing plate arranges 3 groups, is isolated between adjacent pressing plates 4 by dividing plate 6.Packing cavity 5 by top board 41, lower platen 42, and the adjacent backup plate 33 of top board, lower platen and dividing plate composition.Metal powder filler is stressed shaping in this chamber.
Because pre-pressing die under high pressure works, mold working surface will stand serious powder friction, thus requires strict to mold materials.The choice relation of mold materials to blank quality (Density Distribution, precision, surface smoothness etc.), the life-span of mould, production safety, product or this, the problems such as productivity ratio.Therefore, major die part material should meet high strength, high rigidity, high-wearing feature, high rigidity and little thermal coefficient of expansion, excellent heat treatment performance, certain toughness and good machinability etc.The dividing plate 6 of the present embodiment adopts high-quality carbon element structural steel to make, and backup plate 3 adopts cold work die steel to make.Backup plate 3 is through vacuum hardening heat treatment, and Rockwell hardness is between HRB 80 ~ 115.Mould frame 1 and upper holder block 41, lower lock block 42 and dividing plate 6 are all through modifier treatment, and Rockwell hardness is between HRB 60 ~ 100.
See accompanying drawing 3, use the technique of the pre-pressing die of the present embodiment:
1. arrange substrate 7, substrate 7 is provided with in advance the locating hole of corresponding backup plate 3, dividing plate 6, lower lock block 41, position, hole size is slightly larger than pressing plate, is convenient to adjust position.
2. have good positioning after backup plate 3, lower platen 41, dividing plate 6, mould frame 1 is enclosed within outside it, and slightly firmly lock fastening bolt 2, check that each portion is seamless, wouldn't lock completely.
3. after the powder that need sinter fully stirs, insert in packing cavity 5, and compression is tamped.
4. install pressing plate 42, fastening bolt 2 is locked completely.
5. the pre-pressing die device completing filler is put on the pedestal of preformer operating position.
6. preformer is started working, and jump bit 8 applies the pressure of 40 ~ 60 tons downwards to the top board 42 in mould frame 1.
7. reduce pressure, release.
8. repeat the 6th step, jump bit 8 applies the pressure of 40 ~ 60 tons downwards to the top board 42 in mould frame 1.
9. take apart a die frame 1, the shaping pre-briquetting demoulding.
10. the pre-briquetting of the demoulding is put into graphite jig, enter vacuum sintering furnace sintering.
By the pre-pressing die of the present embodiment, before sintering precompressed is realized to metal dust, following beneficial effect can be obtained.
One, use the pre-pressing die of this enforcement, suppress the oxidation of sintered body.
By the pre-pressing die of this enforcement, precompressed is carried out to metal powder opisthosoma, had good improvement to the bulk density of formed body, Rockwell hardness, the performance such as bending strength and wearability.
Two, the formation of bubble (pore) is effectively controlled.
In original once hot pressing technique, for making sintered body have good light transmission, the porosity in hot-press forming body must be down to minimum, but be difficult in atmosphere eliminate the isolated pore existed between crystal grain in hot-forming process.For preventing sintered body to be oxidized, the method for atmosphere sintering can be selected in the right side.
Carry out precompressed by the pre-pressing die of this enforcement, prepare microstructure evenly and effectively eliminate the fine and close hot-press forming body of pore.Because reducing and even eliminate the residue pore in sintered body, heal surface crackle, thus improve density and the intensity of sintered article.
Three, the inhomogeneities of hardness distribution is improved.
Powdered metal parts reduces effective bearing area due to the existence of internal void, causes the uneven distribution of stress along material microstructure.
Carry out precompressed by the pre-pressing die of this enforcement, reduce in hot-forming process, the synchronous ongoing thermal stress of Pressurized-heated is concentrated, and improves the inhomogeneities of hardness distribution.
Above-described embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting the utility model.Any person skilled in the art scholar all without prejudice under spirit of the present utility model and category, can modify above-described embodiment or changes.Therefore, such as have in art and usually know that the knowledgeable modifies or changes not departing from all equivalences completed under the spirit and technological thought that the utility model discloses, must be contained by claim of the present utility model.
Claims (9)
1. the pre-pressing die of the hot-forming goods of metal dust, it is characterized in that, comprise mould frame, backup plate and at least one group of pressing plate is provided with in mould frame, described backup plate is positioned at the outside of pressing plate, often organize pressing plate and comprise top board and lower platen, form packing cavity between described top board and lower platen, between described backup plate and mould frame, be provided with adjustment clamping element.
2. pre-pressing die according to claim 1, is characterized in that, described mould frame is the rectangle frame surrounded by four blocks of side plates.
3. pre-pressing die according to claim 2, is characterized in that, described adjustment clamping element is arranged in two pieces of adjacent side plates of mould frame.
4. pre-pressing die according to claim 1, is characterized in that, described pressing plate is provided with at least 2 groups, is isolated between adjacent pressing plates by dividing plate.
5. pre-pressing die according to claim 1, is characterized in that, described adjustment clamping element is made up of the fastening bolt be threaded on mould frame.
6. pre-pressing die according to claim 4, is characterized in that, the upper surface of described top board is higher than the upper surface of described mould frame, backup plate upper surface and dividing plate upper surface.
7. pre-pressing die according to claim 1, is characterized in that, also comprises substrate, and described mould frame is arranged on substrate.
8. pre-pressing die according to claim 4, is characterized in that, described dividing plate adopts high-quality carbon element structural steel to make.
9. pre-pressing die according to claim 1, is characterized in that, described backup plate adopts cold work die steel to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346974.5U CN204657472U (en) | 2015-05-26 | 2015-05-26 | The pre-pressing die of the hot-forming goods of metal dust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520346974.5U CN204657472U (en) | 2015-05-26 | 2015-05-26 | The pre-pressing die of the hot-forming goods of metal dust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204657472U true CN204657472U (en) | 2015-09-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520346974.5U Active CN204657472U (en) | 2015-05-26 | 2015-05-26 | The pre-pressing die of the hot-forming goods of metal dust |
Country Status (1)
| Country | Link |
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| CN (1) | CN204657472U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108312605A (en) * | 2018-04-03 | 2018-07-24 | 长沙百川超硬材料工具有限公司 | Diamond bead hot pressed sintering is framed |
| CN113327761A (en) * | 2021-05-28 | 2021-08-31 | 刘贱屏 | Tight pressing treatment device of multilayer annular magnetic powder core |
-
2015
- 2015-05-26 CN CN201520346974.5U patent/CN204657472U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108312605A (en) * | 2018-04-03 | 2018-07-24 | 长沙百川超硬材料工具有限公司 | Diamond bead hot pressed sintering is framed |
| CN108312605B (en) * | 2018-04-03 | 2024-04-05 | 长沙百通新材料科技有限公司 | Diamond bead hot-pressing sintering die frame |
| CN113327761A (en) * | 2021-05-28 | 2021-08-31 | 刘贱屏 | Tight pressing treatment device of multilayer annular magnetic powder core |
| CN113327761B (en) * | 2021-05-28 | 2022-11-25 | 四川东阁科技有限公司 | Tight pressing treatment device of multilayer annular magnetic powder core |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Building C, Third Floor, No. 395 Jiangchang West Road, Jing'an District, Shanghai, 2018 Patentee after: SHANGHAI DATE PRECISION MACHINERY FITTINGS CO.,LTD. Address before: Building C, 3rd Floor, No. 395 Jiangchang West Road, Zhabei District, Shanghai, 2018 Patentee before: SHANGHAI DATE PRECISION MACHINERY FITTINGS CO.,LTD. |