CN105562493A - 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
- Publication number
- CN105562493A CN105562493A CN201610159344.6A CN201610159344A CN105562493A CN 105562493 A CN105562493 A CN 105562493A CN 201610159344 A CN201610159344 A CN 201610159344A CN 105562493 A CN105562493 A CN 105562493A
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- Prior art keywords
- memory polymer
- shape
- thin
- wall metal
- metal bellows
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- 239000002184 metal Substances 0.000 title claims abstract description 46
- 229920000431 shape-memory polymer Polymers 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000002861 polymer material Substances 0.000 claims abstract description 4
- 238000004519 manufacturing process Methods 0.000 claims description 14
- 230000009477 glass transition Effects 0.000 claims description 9
- 229920000642 polymer Polymers 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 4
- 230000006386 memory function Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract 1
- 239000010959 steel Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000002324 minimally invasive surgery Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 229920006300 shrink film Polymers 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
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 bellows manufacturing process of Shape-based interpolation memory polymer, belong to forming tubular product technical field.
Background technology
Thin-wall metal bellows a kind ofly has the shell parts that transverse wave has certain amount of deflection, is widely used at industrial circles such as Aero-Space, petrochemical industry, automobile boats and ships, electric meters.It mainly utilizes self elastic deformation function, except possessing elastic characteristic, also there is the multiple performances such as corrosion-resistant, shock-resistant, high temperature resistant, good airproof performance, be a kind of multi-functional parts, axis, angle, side direction and combination displacement thereof can be produced under the effect of external force.Stamping or thermal deformation under firm mould room temperature is generally adopted at present for thin-walled and the higher metal bellows of the ultra-thin wall thickness strength of materials.Adopt above-mentioned any manufacturing process all to there is formation of parts Thickness Distribution uneven, regional area easily breaks, and causes the problem of formation of parts surface quality difference.In addition, thin-wall metal bellows also has and adopts rubber element to be shaped corrugated surface, and the power transmission medium that the method adopts is rubber element, but this manufacturing process device relative complex, production efficiency is lower.
Shape-memory polymer (SMPs) can realize significant macro-scope deformation by applying outside stimulus (as heat, electricity, magnetic, light and humidity etc.).Since 20th century, the eighties found SMPs, the international research interest caused for SME increases rapidly in different field, and achieves a series of progress and achievement.Due to the performance that they are brand-new, SMPs can be used in field widely, the challenge of advanced Aero-Space, machinery, bionical and medical science can be tackled, as self-deployable solar sail on the heat shrink films of the heat-shrinkable tube of intelligent fabric, power domain or packaging, spacecraft, from dismounting mobile phone, intelligent Medical Devices with implant Minimally Invasive Surgery.Utilize shape-memory polymer performance under different outside stimulus that the feature of larger change occurs, can be applied in the shaping of thin-wall metal bellows.
Summary of the invention
When the object of the invention is for solving the thin-wall metal bellows shaping mentioned in background technology, under adopting firm mould room temperature, to there is formation of parts Thickness Distribution uneven for stamping or thermal deformation, regional area easily breaks, cause formation of parts surface quality poor, and adopt rubber element to the square law device relative complex of the corrugated surface that is shaped, the problem that production efficiency is lower, provides a kind of thin-wall metal bellows manufacturing process of Shape-based interpolation memory polymer.
The present invention is the technical scheme solving the problems of the technologies described above employing: the thin-wall metal bellows manufacturing process of a kind of Shape-based interpolation memory polymer of the present invention realizes like this.
Step one: make corrugated shape-memory polymer: the shape memory polymer material outline with shape memory function is made consistent with bellows form to be formed corrugated.
Step 2: make female die for forming: first make die, die is made up of two and half dies, two and half dies fasten and detachable link; Secondly on the inwall of die, corrugated ring die cavity is processed.
Step 3: apply releasing agent on the surface of corrugated ring die cavity.
Step 4: make core: process counterbore and be referred to as medium storehouse on the central axis of a cylindrical side end face.
Step 5: core is arranged in the inner chamber of female die for forming.
Step 6: thin-wall metal pipe to be arranged between female die for forming with core and to ensure that the upper surface of three is concordant respectively with lower surface.
Step 7: fill in medium storehouse and be heated to glass transition temperature
t g above rubbery state shape-memory polymer.
Step 8: thin-wall metal pipe fits tightly with two corrugated ring die cavities of female die for forming and makes thin-wall metal bellows under the effect of corrugated shape-memory polymer naturally cooling to room temperature recovery glassy state.
Step 9: take female die for forming apart, takes out thin-wall metal bellows, core and shape-memory polymer.
Step 10: shape-memory polymer is heated to glass transition temperature
t g above, from medium storehouse take out in rubbery state shape-memory polymer and for making next section of thin-wall metal bellows.The thin-wall metal bellows finally made, the span of its ripple joint number N is 3 ~ 40; Wall thickness is 0.2mm ~ 0.5mm, the inner surface radius of corrugated surface is 0.25mm ~ 1.0mm.
The present invention has following beneficial effect: present invention employs the flexible die forming method based on intellectual material, instead of traditional firm mould room temperature is stamping, neither hot forming, be more different from traditional flexible die forming, thin-wall metal bellows adopts integral forming method.The present invention by adopting shape-memory polymer as power transmission medium, can make full use of its at different temperatures performance there is the feature of larger change, produce comparatively noticeable effort at ripple die cavity place relatively easily; Shape-memory polymer can set up pressure distribution heterogeneous in blank surface simultaneously, be adapted to the change of deformation process stress, effectively suppress the resilience of part after being shaped, improve the uniformity of formation of parts Thickness Distribution, prevent breaking of regional area, improve surface quality of workpieces.
Accompanying drawing explanation
Fig. 1 is shaping thin-wall metal bellows shape-memory polymer, and its outline is made consistent with bellows form to be formed corrugated; Fig. 2 is shaping thin-wall metal bellows, the main sectional view (being filled with shape-memory polymer) that female die for forming, core and thin-wall metal pipe are assembled together; Fig. 3 is the main sectional view (female die for forming, core and thin-wall metal pipe, shape-memory polymer does not take out) of the shaped state of thin-wall metal bellows; Fig. 4 is for taking female die for forming apart after shaping terminates, the main sectional view of the shape-memory polymer in glassy state under thin-wall metal bellows, core and the room temperature of taking out; Fig. 5 is for shape-memory polymer is heated to glass transition temperature
t g above, the main sectional view of the shape-memory polymer in rubbery state and thin-wall metal bellows and core; Fig. 6 is the front view (merely illustrating six minor radius corrugated surfaces) of the thin-wall metal bellows utilizing method of the present invention to be shaped.
Detailed description of the invention
Detailed description of the invention one: composition graphs 1 ~ Fig. 6 illustrates, the thin-wall metal bellows manufacturing process of a kind of Shape-based interpolation memory polymer of present embodiment realizes like this.
Step one: make corrugated shape-memory polymer 7: the shape memory polymer material outline with shape memory function is made consistent with bellows form to be formed corrugated.
Step 2: make female die for forming 1: first make die, die is made up of two and half dies 2, two and half dies 2 fasten and detachable link; Secondly on the inwall of die, corrugated ring die cavity 3 is processed.
Step 3: apply releasing agent on the surface of corrugated ring die cavity 3.
Step 4: make core 5: process counterbore and be referred to as medium storehouse 8 on the central axis of a side end face of cylinder 4.
Step 5: core 5 is arranged in the inner chamber of female die for forming 1.
Step 6: thin-wall metal pipe 6 to be arranged between female die for forming 1 with core 5 and to ensure that the upper surface of three is concordant respectively with lower surface.
Step 7: fill in medium storehouse 8 and be heated to glass transition temperature
t g above rubbery state shape-memory polymer 7.
Step 8: thin-wall metal pipe 6 fits tightly with two corrugated ring die cavities 3 of female die for forming 1 and makes thin-wall metal bellows under the effect of corrugated shape-memory polymer 7 naturally cooling to room temperature recovery glassy state.
Step 9: take female die for forming 1 apart, takes out thin-wall metal bellows 6, core 5 and shape-memory polymer 7.
Step 10: shape-memory polymer 10 is heated to glass transition temperature
t g above, from medium storehouse 8 take out in rubbery state shape-memory polymer and for making next section of thin-wall metal bellows.
Detailed description of the invention two: the thin-wall metal bellows that present embodiment is finally made, the span of its ripple joint number N is 3 ~ 40; Wall thickness is 0.2mm ~ 0.5mm, the inner surface radius of corrugated surface is 0.25mm ~ 1.0mm.Other method step is identical with detailed description of the invention one.
Detailed description of the invention three: the releasing agent used in the step 3 of present embodiment is without wax release agent.Other method step is identical with detailed description of the invention one or two.
Detailed description of the invention four: in the step one of present embodiment, step 7 to step 10, shape-memory polymer used is polyurethane-base thermotropic shape-memory polymer; This shape-memory polymer glass transition temperature
t g it is 25 DEG C ~ 55 DEG C; Elastic modelling quantity when it is in glassy state is 0.5GPa ~ 1.0GPa, and elastic modelling quantity when being in rubbery state is 0.5MPa ~ 2.0MPa.Other method step is identical with detailed description of the invention one or two or three.
Claims (4)
1. a thin-wall metal bellows manufacturing process for Shape-based interpolation memory polymer, is characterized in that: described manufacturing process is achieved in that
Step one: make corrugated shape-memory polymer (7): the shape memory polymer material outline with shape memory function is made consistent with bellows form to be formed corrugated;
Step 2: make female die for forming (1): first make die, die is made up of two and half dies (2), two and half dies (2) fasten and detachable link; Secondly on the inwall of die, corrugated ring die cavity (3) is processed;
Step 3: apply releasing agent on the surface of corrugated ring die cavity (3);
Step 4: make core (5): process counterbore and be referred to as medium storehouse (8) on the central axis of a side end face of cylinder (4);
Step 5: core (5) is arranged in the inner chamber of female die for forming (1);
Step 6: thin-wall metal pipe (6) to be arranged between female die for forming (1) with core (5) and to ensure that the upper surface of three is concordant respectively with lower surface;
Step 7: fill in medium storehouse (8) and be heated to glass transition temperature
t g above rubbery state shape-memory polymer (7);
Step 8: thin-wall metal pipe (6) fits tightly with two corrugated ring die cavities (3) of female die for forming (1) and makes thin-wall metal bellows under the effect of corrugated shape-memory polymer (7) naturally cooling to room temperature recovery glassy state;
Step 9: take female die for forming (1) apart, takes out thin-wall metal bellows (6), core (5) and shape-memory polymer (7);
Step 10: shape-memory polymer (10) is heated to glass transition temperature
t g above, from medium storehouse (8) take out in rubbery state shape-memory polymer and for making next section of thin-wall metal bellows.
2. according to the thin-wall metal bellows manufacturing process of a kind of Shape-based interpolation memory polymer shown in claim 1, it is characterized in that: the thin-wall metal bellows finally made, the span of its ripple joint number N is 3 ~ 40; Wall thickness is 0.2mm ~ 0.5mm, the inner surface radius of corrugated surface is 0.25mm ~ 1.0mm.
3. the thin-wall metal bellows manufacturing process of a kind of Shape-based interpolation memory polymer according to claim 1, is characterized in that: the releasing agent used in step 3 is without wax release agent.
4. the thin-wall metal bellows manufacturing process of a kind of Shape-based interpolation memory polymer according to claim 1, is characterized in that: in step one, step 7 to step 10, shape-memory polymer used is polyurethane-base thermotropic shape-memory polymer; This shape-memory polymer glass transition temperature
t g it is 25 DEG C ~ 55 DEG C; Elastic modelling quantity when it is in glassy state is 0.5GPa ~ 1.0GPa, and elastic modelling quantity when being in rubbery state is 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 |
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| 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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| Publication Number | Publication Date |
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| CN105562493A true CN105562493A (en) | 2016-05-11 |
| CN105562493B CN105562493B (en) | 2017-04-12 |
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| CN201610159344.6A Active CN105562493B (en) | 2016-03-21 | 2016-03-21 | Method for forming thin-wall metal bellows based on shape memory polymer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227748A (en) * | 2019-06-25 | 2019-09-13 | 中国航发贵州黎阳航空动力有限公司 | A kind of minor diameter thin wall wavy metal pipe forming apparatus and method |
| CN110899510A (en) * | 2019-12-16 | 2020-03-24 | 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 |
Citations (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 |
| JPH0386325A (en) * | 1989-08-28 | 1991-04-11 | Usui Internatl Ind Co Ltd | Manufacture of multilayered bellows pipe |
| 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 |
| CN1214973A (en) * | 1997-10-22 | 1999-04-28 | 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 |
-
2016
- 2016-03-21 CN CN201610159344.6A patent/CN105562493B/en active Active
Patent Citations (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 |
| JPH0386325A (en) * | 1989-08-28 | 1991-04-11 | Usui Internatl Ind Co Ltd | Manufacture of multilayered bellows pipe |
| 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 |
| CN1214973A (en) * | 1997-10-22 | 1999-04-28 | 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 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110227748A (en) * | 2019-06-25 | 2019-09-13 | 中国航发贵州黎阳航空动力有限公司 | A kind of minor diameter thin wall wavy metal pipe forming apparatus and method |
| 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 |
| CN110899510A (en) * | 2019-12-16 | 2020-03-24 | 浙江普兴电子科技有限公司 | Forming device and forming method of sine type expandable metal sealing structure |
| 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 |
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| CN105562493B (en) | 2017-04-12 |
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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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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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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 |
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