CN101285494B - Fastening piece and its manufacturing technique - Google Patents
Fastening piece and its manufacturing technique Download PDFInfo
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- CN101285494B CN101285494B CN2008100304707A CN200810030470A CN101285494B CN 101285494 B CN101285494 B CN 101285494B CN 2008100304707 A CN2008100304707 A CN 2008100304707A CN 200810030470 A CN200810030470 A CN 200810030470A CN 101285494 B CN101285494 B CN 101285494B
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- fastener
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Abstract
The invention discloses a fastener which is made by processing carbon/carbon composite materials and a process for producing the same. The fastener comprises a screw [1], a bolt [2], a stud [2], a nut [4] and a gasket, the fastener replaces a graphite fastener or a molybdenum fastener in a high temperature furnace or corrosive environment, which is made by carbon fiber after processes of blank-making, densification, plastication modification, machine tooling and purification. Because the interior of the carbon fiber composite materials has a quasi three-dimensional structure, the fastener which is processed by the invention has the advantages of excellent high specific strength, small thermal expansion coefficient and heat shock resistance without deformation and cracking, wherein bendingstrength of the fastener is about ten times of the graphite, and the service life is available for more than one year; because of lubrication performance of the graphite, the fastener is convenient in assembly and disassembly in use; after the fastener undergoes surface processing, the surface of the fastener is clean without ash falling, which has no pollution to surrounding environment, parts, raw materials and finished products.
Description
Technical field:
The present invention relates to a kind of High Temperature Furnaces or corrosive atmosphere part, specifically a kind of fastening piece and production technology thereof.
Background technique:
At present, the heater of pyrometallurgy stove generally is made up of heater, contiguous block and fastening piece etc., its material is made by graphite, exist during use because of graphite screw poor mechanical property, often fracture and losing efficacy causes heater to fall apart, and causes to stop production or accident, have a strong impact on ordinary production, the working life that has is ten days only; The crucible tray of polycrystalline furnace is made up of graphite cake and graphite screw, and the graphite screw often ruptures because of being subjected to the thermal stress effect, in the only several days working life that has, cost of production is increased.In addition, graphite product falls ash, and hand can glue the evil backstage manipulator when taking; During use, can pollute, influence the purity and the quality of product surrounding environment, part, raw material and finished product etc.The molybdenum matter screw that uses in the pyrometallurgy stove uses after a period of time in hot environment, sintering phenomenon often occurs, and screw rod and screw are bonded to one, and is difficult to dismounting, makes troubles for the stove maintenance work, and the stove maintenance cost is increased.Carbon/carbon composite is a kind of net tire and net tire that the charcoal fiber is made, or charcoal cloth and charcoal cloth, or net tire and charcoal cloth are compound, pass through density again, the carbon/carbon composite that charing and graphitization processing form, has high specific strength, high ratio modulus, high temperature resistant, anti-ablation, thermal expansion coefficient is little, anti-rapid heat cycle and indeformable premium properties such as do not ftracture, be adapted to the high temperature field especially, now become or will progressively become Aero-Space, metallurgical, one of the important foundation material in fields such as new energy, being used to make fastening piece, is the ideal substitute of graphite fastening piece and molybdenum matter fastening piece.
Summary of the invention:
The purpose of this invention is to provide a kind of fastening piece and production technology thereof that adopts carbon/carbon composite to be processed into, its fastening piece comprises screw, bolt, double-screw bolt, nut and pad, be used for High Temperature Furnaces or corrosive atmosphere, substitute graphite fastening piece or molybdenum matter fastening piece.
The present invention adopts following technological scheme to realize its goal of the invention, a kind of fastening piece, and it is processed into by carbon/carbon composite.
A kind of fastening piece, it is made through base-density-plasticization and modification-machining-purification by the charcoal fiber.
It comprises screw, bolt, double-screw bolt, nut, pad fastening piece of the present invention.
The production technology of a kind of fastening piece of the present invention, it may further comprise the steps:
(1) base: the net tire that will be made by the charcoal fiber and net tire or charcoal cloth and charcoal cloth or net tire and charcoal cloth crossover are placed to required thickness, make it compound by acupuncture or puncture, make the carbon/carbon composite base substrate of necessary requirement;
(2) density: the base substrate of step (1) gained through chemical vapor infiltration (deposition) and/or liquid infiltration density, is made the carbon/carbon composite of necessary requirement;
(3) plasticization and modification: step (2) gained carbon/carbon composite be impregnated in the resin adhesive liquid;
(4) machining:, be machined to the fastening piece of required form and size with the carbon/carbon composite of step (3) gained;
(5) purify: the fastening piece of step (4) gained is put into High Temperature Furnaces, under vacuum condition, add wherein impurity of heat abstraction.
As a kind of improvement of the present invention, be to carry out step (6) to clean after step (5): be about to fastening piece and rinse well, make its cleaning surfaces free from dust and any staining, baking is dry then; After step (6), carry out step (7) surface treatment, be about to fastening piece and place the CVD stove, carry out chemical vapor deposition; Fastening piece under 800 ℃～1100 ℃ temperature, in propylene and/or rock gas atmosphere, carries out surface treatment to it in chemical vapor deposition stove.
The present invention is in step (1), and the surface density of described net tire is 30g/m
2～130g/m
2Depth of needling is 15mm～30mm; Needling density is 3 times/cm
2～10 times/cm
2Charcoal cloth density is 120g/m
2～300g/m
2, layer density is 7 layers/cm～30 layer/cm.
The present invention is in step (2), and density is 1.1g/m after the base substrate density
3～1.8g/m
3
The present invention is in step (3), and dip time is 10 minutes～90 minutes.
Because adopt technique scheme, the present invention has realized goal of the invention preferably.Because carbon fiber composite inside has accurate three-dimensional structure, the fastening piece of being processed into, has the excellent little and anti-rapid heat cycle of high specific strength, thermal expansion coefficient and indeformable indehiscent performance, its resistance to flexure is about ten times of graphite, make it to be not easy under the effect of external force or in the working environment of rapid heat cycle, to break, significantly improve its working life, can reach more than 1 year through the life-span on probation; Because it is it has the greasy property of graphite, easy to loading and unloading during use again; Through after the surface treatment, its cleaning surfaces does not fall ash, can not pollute surrounding environment, part, raw material and finished product etc.
Description of drawings:
Fig. 1 is the structural representation of double-screw bolt 3 of the present invention, nut 4;
Fig. 2 is the structural representation of bolt 2 of the present invention, nut 4;
Fig. 3 is the structural representation of screw 1 of the present invention.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing.
Embodiment 1:
Double-screw bolt 3 can be made into isometrically in the accompanying drawing 1, i.e. each section diameter basically identical also can be made into waneyly, and its two is threaded, be used with nut 4, during use by the nut 4 at two or add clamping plate connected piece is clamped.Nut 4 can be made into circle, square, hexagon and bent limit shape (present embodiment is a hexagon).Its production technology may further comprise the steps:
(1) base:
Shredding becomes net: choose the long short carbon fiber of 6～70mm, become fluffy single shape fiber through the shredding of shredding equipment, then the good charcoal fiber of shredding through air lay and/or carding, utilize the lapping machine to be paved into fleece again, sting into the net tire in advance.The surface density of described net tire is 30g/m
2～130g/m
2(present embodiment is 100g/m
2); Charcoal cloth is formed by the braiding of charcoal fiber tuft, and charcoal cloth density is 120g/m
2～300g/m
2(present embodiment is 230g/m
2).
Lamination is compound: the net tire of gained is tiled on the worktable, spreads layer charcoal cloth then in the above, a shop layer net tire on charcoal cloth makes it compound by acupuncture again, and depth of needling is 15mm～30mm (present embodiment is 23mm); 3 times/cm of needling density
2～10 times/cm
2(present embodiment is 9 times); Layer density be 7 layers/cm～30 layer/cm (present embodiment be 12 layers/cm), so repeat to make the carbon/carbon composite base substrate of necessary requirement.Maybe net tire and charcoal cloth crossover are placed to required thickness, make the carbon/carbon composite base substrate of necessary requirement by puncture.
Also can adopt net tire and net tire or charcoal cloth and charcoal cloth to make the carbon/carbon composite base substrate of necessary requirement by acupuncture or puncture.
(2) density: the base substrate density of step (1) gained is become carbon/carbon composite.Thickening technology includes but not limited to chemical vapor infiltration (deposition) and/or liquid infiltration, its density is progressively increased and through charing (as needs) and graphitization processing, it is 1.1g/m that prefabricated component is processed into density
3～1.8g/m
3(present embodiment is 1.5g/m
3) carbon/carbon composite;
(3) plasticization and modification: step (2) gained carbon/carbon composite be impregnated in (present embodiment is an epoxy resin adhesive liquid) in the resin adhesive liquid, and dip time is 10 minutes～90 minutes (present embodiment is 35 minutes); Strengthen its plasticity, improve its processibility, eliminate the phenomenon that collapses in the machining process.The present invention can also adopt alkyd resin, acrylic resin etc.
(4) machining:, be machined to needed double-screw bolt 3 and nut 4 with the carbon/carbon composite of step (3) gained plasticization and modification.
(5) purify: the fastening piece of step (4) gained is put into High Temperature Furnaces, be heated to 800 ℃-1600 ℃ (present embodiment is 1200 ℃) under vacuum condition ,-360 minutes (present embodiment is 200 minutes) removes wherein impurity to be incubated 60 minutes.
For making its cleaning surfaces free from dust and any staining, increase step (6) and clean: be about to double-screw bolt 3 and nut 4 and rinse well, baking is dry then.
For making double-screw bolt 3 and nut 4 cleaning surfaces not fall ash, during use, can not stain surrounding enviroment; Hand can not glue the evil backstage manipulator when taking yet.Increase step (7) surface treatment: be about to double-screw bolt 3 and nut 4 and place the CVD stove, carry out chemical vapor deposition.Promptly under 800 ℃～1100 ℃ (present embodiment is 900 ℃) temperature, (present embodiment is a propylene) carries out surface treatment to it in propylene and/or rock gas atmosphere.
According to usage requirement, also can will directly come into operation through double-screw bolt 3 and nut 4 after the step (5), and without step (6) and step (7).
Embodiment 2:
Present embodiment adopts the dipping thickening technology to make its density density to 1.7g/cm in step (2)
3In step (3), adopt 191 unsaturated polyester resins.
Surplus with embodiment 1.
Embodiment 3:
Screw 1 does not generally need to use nut 4 in the accompanying drawing 3, its helical thread portion directly is screwed in the screw of one of connected piece, and connected piece is coupled together; Also can be used, connected piece is linked together with nut 4.Spiral shell head 5 has the branch of countersunk head, round end, square toes, and the head of sunk screw and round head bolt all has straight groove or cross recess (the spiral shell head 5 of present embodiment is countersunk head, and its head has straight groove).Production technology may further comprise the steps:
Present embodiment adopts the chemical vapor deposition method density in step (2), density is 1.3g/cm
3In step (3), adopt urea formaldehyde resin.
Surplus with embodiment 1.
Claims (8)
1. the production technology of a fastening piece is characterized in that may further comprise the steps:
(1) base: the net tire that will be made by the charcoal fiber and net tire or charcoal cloth and charcoal cloth or net tire and charcoal cloth crossover are placed to required thickness, make it compound by acupuncture or puncture, make the carbon/carbon composite base substrate of necessary requirement;
(2) density: the base substrate of step (1) gained through chemical vapor deposition and/or liquid infiltration density, is made the carbon/carbon composite of necessary requirement;
(3) plasticization and modification: step (2) gained carbon/carbon composite be impregnated in the resin adhesive liquid;
(4) machining:, be machined to the fastening piece of required form and size with the carbon/carbon composite of step (3) gained;
(5) purify: the fastening piece of step (4) gained is put into High Temperature Furnaces, under vacuum condition, add wherein impurity of heat abstraction.
2. according to the production technology of the described a kind of fastening piece of claim 1, it is characterized in that carrying out step (6) and clean after step (5): be about to fastening piece and rinse well, make its cleaning surfaces free from dust and any staining, baking is dry then.
3. according to the production technology of the described a kind of fastening piece of claim 2, it is characterized in that after step (6), carrying out step (7) surface treatment, be about to fastening piece and place the CVD stove, carry out chemical vapor deposition.
4. according to the production technology of the described a kind of fastening piece of claim 3, it is characterized in that fastening piece in chemical vapor deposition stove, under 800 ℃～1100 ℃ temperature, in propylene and/or rock gas atmosphere, carry out surface treatment.
5. according to the production technology of the described a kind of fastening piece of claim 1, it is characterized in that in the step (1), the surface density of described net tire is 30g/m
2～130g/m
2Depth of needling is 15mm～30mm; Needling density is 3 times/cm
2～10 times/cm
2Charcoal cloth density is 120g/m
2～300g/m
2, layer density is 7 layers/cm～30 layer/cm.
6. according to the production technology of the described a kind of fastening piece of claim 1, it is characterized in that in step (2), density is 1.1g/m after the base substrate density
3～1.8g/m
3
7. according to the production technology of the described a kind of fastening piece of claim 1, it is characterized in that in step (3) that dip time is 10 minutes～90 minutes.
8. a kind of fastening piece of producing of the production technology of fastening piece according to claim 1 is characterized in that it is made through base-density-plasticization and modification-machining-purification by the charcoal fiber.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100304707A CN101285494B (en) | 2008-01-10 | 2008-01-10 | Fastening piece and its manufacturing technique |
| PCT/CN2008/072238 WO2009003424A1 (en) | 2007-07-04 | 2008-09-02 | A fastener and a manufacture process of the same |
| US12/602,982 US20100170625A1 (en) | 2007-07-04 | 2008-09-02 | Fastener and a manufacture process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100304707A CN101285494B (en) | 2008-01-10 | 2008-01-10 | Fastening piece and its manufacturing technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101285494A CN101285494A (en) | 2008-10-15 |
| CN101285494B true CN101285494B (en) | 2010-11-03 |
Family
ID=40057852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100304707A Active CN101285494B (en) | 2007-07-04 | 2008-01-10 | Fastening piece and its manufacturing technique |
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| Country | Link |
|---|---|
| CN (1) | CN101285494B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030554B (en) * | 2010-11-02 | 2013-07-31 | 西安超码科技有限公司 | Method for compacting carbon/carbon composite material by using natural gas mixture CVI (Chemical Vapor Infiltration) |
| CN102731119B (en) * | 2012-07-05 | 2013-10-02 | 湖南金博复合材料科技有限公司 | Crucible using carbon/carbon/silicon carbide composite material and preparation method thereof |
| CN102731133B (en) * | 2012-07-05 | 2013-11-06 | 湖南金博复合材料科技有限公司 | Fastener using carbon/carbon/silicon carbide composite material and preparation method of fastener |
| CN103317313B (en) * | 2013-07-15 | 2017-02-08 | 鹏驰五金制品有限公司 | Automobile hub bolt and machining technology thereof |
| TWI565599B (en) * | 2016-03-31 | 2017-01-11 | 昱程科技股份有限公司 | Carbon fiber washer and bonding method thereof |
| CN109111239B (en) * | 2018-10-30 | 2021-11-16 | 中南大学 | Device for preparing ultrathin carbon/carbon composite material panel and preparation method of panel |
| CN112759409B (en) * | 2021-02-07 | 2022-01-14 | 内蒙古中晶科技研究院有限公司 | Carbon/carbon composite material vapor deposition process |
| CN114562504A (en) * | 2022-02-28 | 2022-05-31 | 江苏省艾维德紧固件有限公司 | Combined bolt fastener with damping effect |
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2008
- 2008-01-10 CN CN2008100304707A patent/CN101285494B/en active Active
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| Publication number | Publication date |
|---|---|
| CN101285494A (en) | 2008-10-15 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Fastening piece and its manufacturing technique Effective date of registration: 20131122 Granted publication date: 20101103 Pledgee: Yiyang branch of Bank of Communications Ltd Pledgor: Hunan gold Bo composite Mstar Technology Ltd|Liao Jiqiao Registration number: 2013990000891 |
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| CP01 | Change in the name or title of a patent holder |
Address after: 413000 Hunan province Yiyang Yingbin Road No. 2 Patentee after: Hunan gold carbon Limited by Share Ltd Address before: 413000 Hunan province Yiyang Yingbin Road No. 2 Patentee before: Hunan KBCarbon Composite Science and Technology Co., Ltd. |
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Date of cancellation: 20190930 Granted publication date: 20101103 Pledgee: Yiyang branch of Bank of Communications Ltd Pledgor: Hunan Jinbo composite material technology Co., Ltd.|Liao Jiqiao Registration number: 2013990000891 |