CN105562493B - Method for forming thin-wall metal bellows based on shape memory polymer - Google Patents
Method for forming thin-wall metal bellows based on shape memory polymer Download PDFInfo
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- CN105562493B CN105562493B CN201610159344.6A CN201610159344A CN105562493B CN 105562493 B CN105562493 B CN 105562493B CN 201610159344 A CN201610159344 A CN 201610159344A CN 105562493 B CN105562493 B CN 105562493B
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- shape
- memory polymer
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- wall metal
- forming
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- 229920000431 shape-memory polymer Polymers 0.000 title claims abstract description 50
- 239000002184 metal Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000002861 polymer material Substances 0.000 claims abstract description 4
- 238000001816 cooling Methods 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 230000009477 glass transition Effects 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- 230000006386 memory function Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 230000003446 memory effect Effects 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920006300 shrink film Polymers 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
- B21D15/10—Corrugating tubes transversely, e.g. helically by applying fluid pressure
- B21D15/105—Corrugating tubes transversely, e.g. helically by applying fluid pressure by applying elastic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
- B21D15/06—Corrugating tubes transversely, e.g. helically annularly
Abstract
The invention provides a method for forming a thin-wall metal bellows based on a shape memory polymer and relates to a thin-wall metal bellows forming method. The invention aims at solving the problems that wall thickness distribution of a formed part is uneven, a local region can be easily cracked, a forming device is complex and cost is relatively high when a steel die is used for carrying out stamping forming of a thin-wall metal bellows with relatively high material strength at room temperature. According to key points of the technical scheme, the method provided by the invention comprises the following steps: preparing a ripple shape memory polymer, making a forming die, making a core die to be assembled with the forming die, filling a medium bin with rubbery state shape memory polymer material, naturally cooling the shape memory polymer to room temperature, opening the die, and taking out the formed part. The method provided by the invention is applied to thin-wall metal bellows forming.
Description
Technical field
The present invention relates to a kind of thin-wall metal corrugated tube manufacturing process based on shape-memory polymer, belongs to forming tubular product
Technical field.
Background technology
Thin-wall metal corrugated tube is a kind of shell parts for having certain amount of deflection with transverse wave, in Aero-Space, stone
The industrial circles such as oiling work, automobile ship, electric meter are widely used.It mainly uses the resilience work of deformation of itself
Can, in addition to possessing elastic characteristic, also with multiple performances such as corrosion-resistant, impact resistance, high temperature resistant, good airproof performances, it is a kind of many work(
The parts of energy, can produce axial direction, angular, lateral and combinations thereof displacement in the presence of external force.For thin-walled and ultra-thin-wall
The higher metal bellowss of thick material intensity are at present generally using stamping or thermal deformation under firm mould room temperature.No matter using upper
State any manufacturing process and all have that formation of parts Thickness Distribution is uneven, regional area is easily broken, and causes formation of parts table
The ropy problem in face.Additionally, thin-wall metal corrugated tube also has using rubber element to shape corrugated surface, the method is adopted
Power transmission medium be rubber element, but this manufacturing process device is relative complex, and production efficiency is relatively low.
Shape-memory polymer（SMPs）By applying outside stimuluss（Such as heat, electricity, magnetic, light and humidity etc.）Can realize
The macro-scope deformation of meaning.Since 20th century, the eighties found SMPs, grind for the world that shape memory effect causes
Study carefully interest to increase rapidly in different field, and achieve a series of progress and achievement.Due to their brand-new performances, SMPs
Extensive field can be used in, advanced Aero-Space, machinery, the such as challenge of bionical and medical science, intelligence can be tackled
Can fabric, the heat shrink films of the heat-shrinkable tube of power domain or packaging, self-deployable solar sail on spacecraft, from dismounting mobile electricity
Words, intelligent armarium and implantation Minimally Invasive Surgery.Using shape-memory polymer under different outside stimuluss performance occur compared with
The characteristics of big change, can be applied in the shaping of thin-wall metal corrugated tube.
The content of the invention
When the purpose of the present invention is that the thin-wall metal corrugated tube to solve to refer in background technology shapes, using firm mould room temperature
Under stamping or thermal deformation have that formation of parts Thickness Distribution is uneven, regional area is easily broken, and causes formation of parts
Surface quality is poor, and the square law device that corrugated surface is shaped using rubber element is relative complex, the relatively low problem of production efficiency,
A kind of thin-wall metal corrugated tube manufacturing process based on shape-memory polymer is provided.
The present invention is that the technical scheme for solving above-mentioned technical problem employing is：One kind of the present invention is based on shape memory polymers
What the thin-wall metal corrugated tube manufacturing process of thing was realized in.
Step one：Make corrugated shape-memory polymer：By the shape-memory polymer material with shape memory function
Material outline is made consistent with bellows form to be formed corrugated.
Step 2：Make female die for forming：Die is made first, die is made up of two and half dies, two and half dies
Base is fastened and is detachably connected；Next processes corrugated ring die cavity on the inwall of die.
Step 3：Releasing agent is coated on the surface of corrugated ring die cavity.
Step 4：Make core：Counterbore referred to as medium storehouse are processed on the central axis of a side end face of cylinder.
Step 5：Core is arranged in the inner chamber of female die for forming.
Step 6：Thin-wall metal pipe is arranged between female die for forming and core and ensures the upper surface and lower end of three
Face is concordant respectively.
Step 7：The filling into medium storehouse is heated to glass transition temperatureT g Rubbery state shape memory polymers above
Thing.
Step 8：Thin-wall metal pipe is in the corrugated shape-memory polymer for naturally cooling to room temperature recovery glassy state
The lower corrugated ring die cavity with female die for forming of effect is brought into close contact makes thin-wall metal corrugated tube.
Step 9：Take female die for forming apart, take out thin-wall metal corrugated tube, core and shape-memory polymer.
Step 10：Shape-memory polymer is heated to into glass transition temperatureT g More than, take out in rubber from medium storehouse
The shape-memory polymer of colloidal state simultaneously is used to make next section of thin-wall metal corrugated tube.The thin-wall metal corrugated tube being finally made,
The span of its ripple joint number N is 3 ~ 40；Wall thickness be 0.2mm ~ 0.5mm, corrugated surface inner surface radius be 0.25mm ~
1.0mm。
The invention has the advantages that：The flexible die forming method based on intellectual material is present invention employs, rather than
Traditional firm mould room temperature is stamping, nor hot forming, is more different from traditional flexible die forming, thin-wall metal corrugated tube is adopted
Integral forming method.The present invention can make full use of which in not equality of temperature by being used as power transmission medium using shape-memory polymer
The characteristics of lower performance of degree occurs large change, relatively easily produces compared with noticeable effort at ripple die cavity；Shape memory gathers simultaneously
Compound can set up pressure distribution heterogeneous in blank surface, be adapted to the change of deformation process stress, effectively suppress into
The resilience of part after shape, improves the uniformity of formation of parts Thickness Distribution, prevents the rupture of regional area, improve piece surface
Quality.
Description of the drawings
Fig. 1 is that, to shape thin-wall metal corrugated tube shape-memory polymer, its outline is made and corrugated tube to be formed
Consistent corrugated of shape；Fig. 2 is that female die for forming, core and thin-wall metal pipe are assemblied in shape thin-wall metal corrugated tube
Main sectional view together（Filled with shape-memory polymer）；Fig. 3 is the main sectional view of the shaped state of thin-wall metal corrugated tube
（Female die for forming, core and thin-wall metal pipe, shape-memory polymer do not take out）；Fig. 4 is to take apart into after shaping terminates
Shape die, the main sectional view of the shape-memory polymer in glassy state under thin-wall metal corrugated tube, core and the room temperature taken out；
Fig. 5 is for shape-memory polymer is heated to glass transition temperatureT g More than, the shape-memory polymer in rubbery state with
And the main sectional view of thin-wall metal corrugated tube and core；Fig. 6 is the thin-wall metal corrugated tube shaped using the method for the present invention
Front view（Merely illustrate six minor radius corrugated surfaces）.
Specific embodiment
Specific embodiment one：With reference to Fig. 1 ~ Fig. 6 illustrate, present embodiment it is a kind of based on the thin of shape-memory polymer
Wall metal bellowss manufacturing process is realized in.
Step one：Make corrugated shape-memory polymer 7：By the shape-memory polymer material with shape memory function
Material outline is made consistent with bellows form to be formed corrugated.
Step 2：Make female die for forming 1：Die is made first, die is made up of two and half dies 2, and two and half is recessed
Mold base 2 is fastened and is detachably connected；Next processes corrugated ring die cavity 3 on the inwall of die.
Step 3：Releasing agent is coated on the surface of corrugated ring die cavity 3.
Step 4：Make core 5：Counterbore referred to as medium are processed on the central axis of a side end face of cylinder 4
Storehouse 8.
Step 5：Core 5 is arranged in the inner chamber of female die for forming 1.
Step 6：By thin-wall metal pipe 6 be arranged between female die for forming 1 and core 5 and ensure three upper surface and
Lower surface is concordant respectively.
Step 7：The filling into medium storehouse 8 is heated to glass transition temperatureT g Rubbery state shape memory polymers above
Thing 7.
Step 8：Thin-wall metal pipe 6 recovers the corrugated shape-memory polymer 7 of glassy state room temperature is naturally cooled to
In the presence of be brought into close contact with the corrugated ring die cavity 3 of female die for forming 1 and make thin-wall metal corrugated tube.
Step 9：Take female die for forming 1 apart, take out thin-wall metal corrugated tube 6, core 5 and shape-memory polymer 7.
Step 10：Shape-memory polymer is heated to into glass transition temperatureT g More than, take out in rubber from medium storehouse 8
The shape-memory polymer of colloidal state simultaneously is used to make next section of thin-wall metal corrugated tube.
Specific embodiment two：The thin-wall metal corrugated tube that present embodiment is finally made, the value model of its ripple joint number N
Enclose for 3 ~ 40；Wall thickness is 0.2mm ~ 0.5mm, the inner surface radius of corrugated surface is 0.25mm ~ 1.0mm.Other method and steps with
Specific embodiment one is identical.
Specific embodiment three：Releasing agent used in the step of present embodiment three is without wax release agent.Other
Method and step is identical with specific embodiment one or two.
Specific embodiment four：The step of present embodiment one, step 7 the shape-memory polymer used into step 10
For polyurethane-base thermotropic shape-memory polymer；The shape-memory polymer glass transition temperatureT g For 25 DEG C ~ 55 DEG C；Its
In glassy state when elastic modelling quantity be 0.5GPa ~ 1.0GPa, in rubbery state when elastic modelling quantity be 0.5MPa ~ 2.0MPa.
Other method and steps are identical with specific embodiment one or two or three.
Claims (4)
1. a kind of thin-wall metal corrugated tube manufacturing process based on shape-memory polymer, it is characterised in that：The manufacturing process
It is realized in：
Step one：Make corrugated shape-memory polymer（7）：By the shape memory polymer material with shape memory function
Outline is made consistent with bellows form to be formed corrugated；
Step 2：Make female die for forming（1）：Die is made first, die is by two and half dies（2）Composition, two and half is recessed
Mold base（2）Fasten and be detachably connected；Next processes corrugated ring die cavity on the inwall of die（3）；
Step 3：In corrugated ring die cavity（3）Surface on coat releasing agent；
Step 4：Make core（5）：In cylinder（4）A side end face central axis on process counterbore referred to as medium
Storehouse（8）；
Step 5：By core（5）It is arranged on female die for forming（1）Inner chamber in；
Step 6：By thin-wall metal pipe（6）It is arranged on female die for forming（1）With core（5）Between and ensure the upper surface of three
It is concordant with lower surface difference；
Step 7：To medium storehouse（8）Interior filling is heated to glass transition temperatureT g Rubbery state shape-memory polymer above
（7）；
Step 8：Thin-wall metal pipe（6）In the corrugated shape-memory polymer for naturally cooling to room temperature recovery glassy state（7）
In the presence of with female die for forming（1）Corrugated ring die cavity（3）It is brought into close contact and makes thin-wall metal corrugated tube；
Step 9：Take female die for forming apart（1）, take out thin-wall metal corrugated tube, core（5）And shape-memory polymer（7）；
Step 10：Shape-memory polymer is heated to into glass transition temperatureT g More than, from medium storehouse（8）It is middle to take out in rubber
The shape-memory polymer of state simultaneously is used to make next section of thin-wall metal corrugated tube.
2. a kind of thin-wall metal corrugated tube manufacturing process based on shape-memory polymer according to claim 1, which is special
Levy and be：The thin-wall metal corrugated tube being finally made, the span of its ripple joint number N is 3 ~ 40；Wall thickness be 0.2mm ~
0.5mm, the inner surface radius of corrugated surface are 0.25mm ~ 1.0mm.
3. a kind of thin-wall metal corrugated tube manufacturing process based on shape-memory polymer according to claim 1, which is special
Levy and be：Releasing agent used in step 3 is without wax release agent.
4. a kind of thin-wall metal corrugated tube manufacturing process based on shape-memory polymer according to claim 1, which is special
Levy and be：Step one, the step 7 shape-memory polymer used into step 10 is polyurethane-base thermotropic shape memory polymers
Thing；The shape-memory polymer glass transition temperatureT g For 25 DEG C ~ 55 DEG C；Elastic modelling quantity when which is in glassy state is
0.5GPa ~ 1.0GPa, in rubbery state when elastic modelling quantity be 0.5MPa ~ 2.0MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610159344.6A CN105562493B (en) | 2016-03-21 | 2016-03-21 | Method for forming thin-wall metal bellows based on shape memory polymer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610159344.6A CN105562493B (en) | 2016-03-21 | 2016-03-21 | Method for forming thin-wall metal bellows based on shape memory polymer |
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| CN105562493A CN105562493A (en) | 2016-05-11 |
| CN105562493B true CN105562493B (en) | 2017-04-12 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227748B (en) * | 2019-06-25 | 2021-02-23 | 中国航发贵州黎阳航空动力有限公司 | Forming device and method for small-diameter thin-wall metal corrugated pipe |
| CN110899510B (en) * | 2019-12-16 | 2021-06-04 | 浙江普兴电子科技有限公司 | Forming device and forming method of sine type expandable metal sealing structure |
| CN111872187A (en) * | 2020-06-30 | 2020-11-03 | 韩阳 | Forming system of bellows |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02163594A (en) * | 1988-12-19 | 1990-06-22 | Mitsubishi Heavy Ind Ltd | Pipe connecting method using shape memory polymer |
| JP2772834B2 (en) * | 1989-08-28 | 1998-07-09 | 臼井国際産業株式会社 | Method of manufacturing multilayer bellows tube |
| CN2199826Y (en) * | 1994-08-17 | 1995-06-07 | 机械工业部沈阳仪器仪表工艺研究所 | Metal bellows forming mechanism by rubber expanding method |
| CN1066357C (en) * | 1997-10-22 | 2001-05-30 | 曾绍谦 | Small diemter thin-wall metal shaped-pipe forming method |
| CN105269839A (en) * | 2015-11-25 | 2016-01-27 | 哈尔滨工业大学 | Method for preparing fibrous composite cap-type rib mold based on shape memory polymers |
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Effective date of registration: 20190329 Address after: 211299 Qinyin Avenue 158, Lishui Economic Development Zone, Nanjing City, Jiangsu Province Patentee after: Nanjing Rouke Aviation Equipment Technology Co.,Ltd. Address before: 1619, Building 49, Queshan Yunfeng Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Pengbo Information Technology Co.,Ltd. Effective date of registration: 20190329 Address after: 1619, Building 49, Queshan Yunfeng Road, Gaofeng Community, Dalang Street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen Pengbo Information Technology Co.,Ltd. Address before: No. 1310 Dagu South Road, Jinnan District, Tianjin Patentee before: Tianjin University of Technology and Education |
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Denomination of invention: Method for forming thin-wall metal bellows based on shape memory polymer Effective date of registration: 20200119 Granted publication date: 20170412 Pledgee: Jiangsu Lishui Rural Commercial Bank Co.,Ltd. Zhunan road sub branch Pledgor: Nanjing Rouke Aviation Equipment Technology Co.,Ltd. Registration number: Y2020320000083 |
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Date of cancellation: 20201230 Granted publication date: 20170412 Pledgee: Jiangsu Lishui Rural Commercial Bank Co.,Ltd. Zhunan road sub branch Pledgor: Nanjing Rouke Aviation Equipment Technology Co.,Ltd. Registration number: Y2020320000083 |
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Denomination of invention: A forming method of thin wall metal bellows based on shape memory polymer Effective date of registration: 20201231 Granted publication date: 20170412 Pledgee: Jiangsu Lishui Rural Commercial Bank Co.,Ltd. Zhunan road sub branch Pledgor: Nanjing Rouke Aviation Equipment Technology Co.,Ltd. Registration number: Y2020980010479 |
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Date of cancellation: 20211221 Granted publication date: 20170412 Pledgee: Jiangsu Lishui Rural Commercial Bank Co.,Ltd. Zhunan road sub branch Pledgor: Nanjing Rouke Aviation Equipment Technology Co.,Ltd. Registration number: Y2020980010479 |
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Denomination of invention: A forming method of thin-walled metal bellows based on shape memory polymer Effective date of registration: 20211222 Granted publication date: 20170412 Pledgee: Jiangsu Lishui Rural Commercial Bank Co.,Ltd. Zhunan road sub branch Pledgor: Nanjing Rouke Aviation Equipment Technology Co.,Ltd. Registration number: Y2021980015845 |
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Denomination of invention: A Forming Method of Thin Metal Bellows Based on Shape Memory Polymer Effective date of registration: 20221209 Granted publication date: 20170412 Pledgee: Jiangsu Lishui Rural Commercial Bank Co.,Ltd. Zhunan road sub branch Pledgor: Nanjing Rouke Aviation Equipment Technology Co.,Ltd. Registration number: Y2022980026279 |