CN1295037C - Sleeve pulling shaping method of nickel titanium base marmem pipe material - Google Patents
Sleeve pulling shaping method of nickel titanium base marmem pipe material Download PDFInfo
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- CN1295037C CN1295037C CNB2005100392738A CN200510039273A CN1295037C CN 1295037 C CN1295037 C CN 1295037C CN B2005100392738 A CNB2005100392738 A CN B2005100392738A CN 200510039273 A CN200510039273 A CN 200510039273A CN 1295037 C CN1295037 C CN 1295037C
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- pipe
- plug
- core rod
- nickel titanium
- pipe blank
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Abstract
The present invention relates to a pulling shaping method of nickel titanium base marmem pipe material, which comprises the following processing steps: (1) nickel titanium base marmem pipe blank and a core rod are processed; (2) the pipe blank, the core rod and a mold are heated to 200 DEG C+/-10 DEG C, and the surfaces of the pipe blank, the core rod and the mold are sprayed by a lubricant; the core rod is inserted in the pipe blank to make into a combined body of the pipe blank and the core rod; the diameter of the end drive head of the combined body is reduced; (3) the combined body of the pipe blank and the core rod is integrally heated to 700 DEG C +/-20 DEG C; (4) the mold is heated to 350 DEG C+/-10 DEG C; (5) the combined body composed of the pipe blank and the core rod is arranged in the mold to be drawn in a warm mode; (6) the steps of (2), (3), (4), (5) are repeated to repeatedly draw the combined body of the pipe blank and the core rod in the warm mode for many times, in the precondition that the pipe blank and the core rod of the combined body are not disassembled, and the outer surface of the core rod is sprayed by the lubricant; (7) after the last time of warm drawing ends, the tail part pipe blank of the combined body of the pipe blank and the core rod is cut to expose the core rod, and the combined body is heated again to 800 DEG C to 850 DEG C; (8) the core rod is drawn in a plasticity mode to reduce the diameter of the core rod and is taken out from the pipe blank. The present invention has the advantages of labor saving, time saving and low production cost.
Description
Technical field:
The present invention relates to a kind of tube forming method, especially relate to a kind of sleeve pulling shaping method of nickel titanium base marmem pipe material.Belong to the tubing processing technique field.
Background technology:
Nickel titanium-base shape memory alloy tubing all has been widely used in fields such as securing member, connector and medical treatment.The Ni-Ti-based shape memory alloy seamless tubular goods is a kind of difficult fabircated shapes.In decades, nickel titanium-base shape memory alloy tubing plastic forming problem is one of the difficult point of domestic and international plastic working engineering area research and focus always.Its product at hydraulic fitting, in miniature weapons such as all kinds of conduits of medical circle, all kinds of intravascular stent, miniature surveillance plane, insect robot and equipment, do connector, delivery such as is connected at the aspect that important use is all arranged.The present invention do make before, the processing method of the nickel titanium-base shape memory alloy tubing of domestic routine have adopt that multi-pass is cold rolling and add in the middle of vacuum annealing process.Because of cold rolling each deflection is very little, cold rolling pass is just many; Vacuum annealing expense height, the time is long.Therefore this technology is time-consuming, and it is long to take the equipment time, the production cost height.
Summary of the invention:
The objective of the invention is to overcome above-mentioned deficiency, a kind of saving of work and time, sleeve pulling shaping method of nickel titanium base marmem pipe material that production cost is lower are provided.
The object of the present invention is achieved like this: a kind of sleeve pulling shaping method of nickel titanium base marmem pipe material is characterized in that its concrete processing step is:
Step 1, by extrusion blooming or machining TiNi base shape memory alloy tube base and plug.
Step 2, earlier heating pipe, plug and mould to 200 ℃ ± 10 ℃, respectively to pipe, mandrel outer surface and mould inner surface spraying lubricant, and then plug inserted make pipe and plug assembly in the pipe, the plug tail end will expose pipe slightly, and the assembly tail end can not drawn by sky; To pipe and the plug assembly end tube reducing of taking the lead, make it can insert the drawing mould core rod.Be higher than 210 ℃ as pipe, plug and mold heated temperature, the lubricant of pipe, plug and die surface is rough, is unfavorable for later drawing, is lower than 190 ℃, and lubricant is sticking less than pipe, plug and die surface.
Step 3, pipe and plug assembly integral body are heated to 700 ℃ ± 20 ℃.Heating-up temperature is higher than 720 ℃, can cause the WC mould to pull, and is lower than 680 ℃, and pipe and plug assembly plasticity are poor, and the resistance of deformation height needs pulling capacity big, might break pipe or draw bad mould.
Step 4, heating mould to 350 ℃ ± 10 ℃, be incubated 1 hour ± 5 minutes, mould is carried out preheating.Be higher than 360 ℃ as heating-up temperature herein, mould strength is low, is unfavorable for back road drawing, and heating-up temperature is lower than 340 ℃, and pipe and plug assembly temperature reduce significantly, also is unfavorable for back road drawing.
Step 5, pipe and plug assembly are placed in the mould, carry out the assembly of warm tube drawing base and plug.
Step 6, under pipe and plug assembly are not taken no longer the prerequisite to mandrel outer surface spraying lubricant apart yet, repeating step two, three, four, five carries out multi-pass repetition temperature to pipe and plug assembly and pulls out.
After step 7, last one temperature were pulled out end, the afterbody pipe of excision pipe and plug assembly to be to expose plug, heated pipe and plug assembly to 800 ℃～850 ℃ once more.Be higher than 900 ℃ of assemblys meeting oxidations, it is low to be lower than 700 ℃ of assembly plasticity, and resistance of deformation is little.
Step 8, plastic elongation plug make its tube reducing and take out from pipe.
Sleeve pulling shaping method of nickel titanium base marmem pipe material of the present invention, the described TiNi base shape memory alloy tube base of step 1 is 1.4～2.0 with the external diameter ratio of plug.Greater than 1.4～2.0, the tube wall thickness of then pulling out is too thick as the external diameter ratio, and less than 1.4～2.0, the tube wall thickness of then pulling out is too thin as the external diameter ratio.
Sleeve pulling shaping method of nickel titanium base marmem pipe material of the present invention, described outer surface of tube blank of step 2 and mould inner surface graphite spraying breast lubricant, two layers of lubricant of mandrel outer surface spraying, internal layer is a glass lubricant, skin is the aquadag lubricant.
The speed that sleeve pulling shaping method of nickel titanium base marmem pipe material of the present invention, the described temperature of step 5 pull out the assembly pipe is 40mm/min～120mm/min.Speed is higher than 120mm/min, and the assembly resistance of deformation is big, and the translation gliding face has little time to start, and plasticity descends, and easily pulls off, and speed is lower than 40mm/min, and production efficiency is too low.
Sleeve pulling shaping method of nickel titanium base marmem pipe material of the present invention, each pass deformation of step 6 is not more than 20%.
Sleeve pulling shaping method of nickel titanium base marmem pipe material of the present invention, the drawing speed of the described plastic elongation plug of step 8 is 50mm/min～80mm/min.This drawing speed is slower, and the deflection that the depoling rod requires is little, unsuitable cutting-off.
The present invention adopts sleeve pulling shaping method processing nickel titanium-base shape memory alloy tubing, and temperature draws each deflection big, and drawing passes is few; Do not need vacuum annealing, expense is few.So this method saving of work and time, it is few to take equipment, and production cost is low.Be applicable to thin footpath nickel titanium-base shape memory alloy tubing sleeve pulling shaping.
Description of drawings:
Fig. 1 is a sleeve pulling shaping process route chart of the present invention.
The specific embodiment:
Embodiment 1:
One, experimental condition:
The test material composition: pipe adopts Ni
50.8Ti
49.2, plug adopts Ni
49.2Ti
50.8Sample dimensions: pipe external diameter ￠ 20mm, internal diameter ￠ 13mm, plug external diameter ￠ 11mm, plug is slightly longer than pipe, not so can draw by sky; Each passage drawing die specification:
￠18.5mm→￠17.2mm→￠16.0mm→￠14.8mm→￠14.0mm。
Mold materials: core rod tungsten carbide, die sleeve: 20#; Die clamp material: mould steel.Mould is similar to the drawing rod of conventional same model or the mould of silk.Pull-out test carries out on the omnipotent tension and compression experiment machine of 600KN.Flame-proof thermal insulation material is arranged in the die clamp, and rising reduces to come out of the stove to drawing finishes action of thermal difference.
Two, sleeve pulling shaping technology
Step 1, by extrusion blooming or machining TiNi base shape memory alloy tube base and plug.TiNi base shape memory alloy tube base is 1.4～2.0 with the external diameter ratio of plug.
Step 2, earlier heating pipe, plug and mould to 200 ℃ ± 10 ℃, respectively to pipe, mandrel outer surface and mould inner surface spraying lubricant, and then plug inserted make pipe and plug assembly in the pipe, pipe and plug assembly integral body are heated to 700 ℃ ± 20 ℃.Wherein said outer surface of tube blank and mould inner surface graphite spraying breast lubricant, two layers of lubricant of mandrel outer surface spraying, internal layer is a glass lubricant, skin is the aquadag lubricant.
Step 3, to pipe and the plug assembly end tube reducing of taking the lead, make it can insert the drawing mould core rod.
Step 4, heating mould to 350 ℃ ± 10 ℃, be incubated 1 hour ± 5 minutes, mould is carried out preheating.
Step 5, pipe and plug assembly are placed in the mould, carry out warm tube drawing base and plug assembly.The speed that temperature is pulled out assembly is 40mm/min～120mm/min.
Step 6, under pipe and plug assembly are not taken no longer the prerequisite to mandrel outer surface spraying lubricant apart yet, repeating step two, three, four, five carries out multi-pass repetition temperature to pipe and plug assembly and pulls out.Each pass deformation is not more than 20%.
After step 7, last one temperature were pulled out end, excision pipe and plug assembly afterbody pipe to be to expose plug, heats pipe and plug assembly to 800 ℃～850 ℃ once more.
Step 8, plastic elongation plug make its tube reducing and take out from pipe.Draw speed is 50mm/min～80mm/min.
Concrete cover is pulled through Cheng Jilu and sees Table 1:
| Plug | Pipe | |||
| External diameter | Internal diameter | External diameter | Length | |
| Original | 11.5 | 11.8 | 17.1 | 208.52 |
| The first road ￠ 16 | 11.5 | 11.5 | 15.7 | 212 |
| The second road ￠ 14.8 | 11.5 | 11.5 | 14.5 | 234 |
| The 3rd road ￠ 14 | 11.0 | 11.0 | 13.6 | 259 |
Claims (7)
1, a kind of sleeve pulling shaping method of nickel titanium base marmem pipe material is characterized in that concrete processing step is:
Step 1, by extrusion blooming or machining TiNi base shape memory alloy tube base and plug;
Step 2, earlier heating pipe, plug and mould to 200 ℃ ± 10 ℃, respectively to pipe, mandrel outer surface and mould inner surface spraying lubricant, and then plug inserted make pipe and plug assembly in the pipe, to pipe and the plug assembly end tube reducing of taking the lead, wherein, outer surface of tube blank and mould inner surface graphite spraying breast lubricant, two layers of lubricant of mandrel outer surface spraying, internal layer is a glass lubricant, and skin is the aquadag lubricant;
Step 3, pipe and plug assembly integral body are heated to 700 ℃ ± 20 ℃;
Step 4, heating mould to 350 ℃ ± 10 ℃, be incubated 1 hour ± 5 minutes, mould is carried out preheating;
Step 5, pipe and plug assembly are placed in the mould, carry out the assembly of warm tube drawing base and plug;
Step 6, under pipe and plug assembly are not taken no longer the prerequisite to mandrel outer surface spraying lubricant apart yet, repeating step two, three, four, five carries out multi-pass repetition temperature to pipe and plug assembly and pulls out;
After step 7, last one temperature were pulled out end, excision pipe and plug assembly afterbody pipe to be to expose plug, heats pipe and plug assembly to 800 ℃～850 ℃ once more;
Step 8, plastic elongation plug make its tube reducing and take out from pipe.
2, sleeve pulling shaping method of nickel titanium base marmem pipe material according to claim 1 is characterized in that: the described TiNi base shape memory alloy tube base of step 1 is 1.4～2.0 with the external diameter ratio of plug.
3, sleeve pulling shaping method of nickel titanium base marmem pipe material according to claim 1 is characterized in that: the speed that the described temperature of step 5 is pulled out assembly is 40mm/min～120mm/min.
4, sleeve pulling shaping method of nickel titanium base marmem pipe material according to claim 1 is characterized in that: described each pass deformation of step 6 is not more than 20%.
5, sleeve pulling shaping method of nickel titanium base marmem pipe material according to claim 1 is characterized in that: the draw speed of the described plastic elongation plug of step 8 is 50mm/min～80mm/min.
6, according to the sleeve pulling shaping method of nickel titanium base marmem pipe material of claim described 4, it is characterized in that: each passage drawing die specification:
￠18.5mm→￠17.2mm→￠16.0mm→￠14.8mm→￠14.0mm。
7, according to the sleeve pulling shaping method of nickel titanium base marmem pipe material of claim described 1, it is characterized in that: blank tube material adopts Ni
50.8Ti
49.2, mandrel material adopts Ni
49.2Ti
50.8
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100392738A CN1295037C (en) | 2005-05-10 | 2005-05-10 | Sleeve pulling shaping method of nickel titanium base marmem pipe material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100392738A CN1295037C (en) | 2005-05-10 | 2005-05-10 | Sleeve pulling shaping method of nickel titanium base marmem pipe material |
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| CN1686627A CN1686627A (en) | 2005-10-26 |
| CN1295037C true CN1295037C (en) | 2007-01-17 |
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| CNB2005100392738A Expired - Fee Related CN1295037C (en) | 2005-05-10 | 2005-05-10 | Sleeve pulling shaping method of nickel titanium base marmem pipe material |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693260B (en) * | 2009-10-09 | 2012-01-25 | 安徽工业大学 | Method for drawing high-precision aluminum pipe |
| CN103157956B (en) * | 2011-12-16 | 2015-04-15 | 北京有色金属研究总院 | Processing method of nickel-titanium memorial alloy tube with thin diameter and thick wall |
| CN103394532B (en) * | 2013-08-22 | 2015-01-28 | 西北有色金属研究院 | Continuous hot-drawing forming method for nickel-titanium alloy pipe |
| CN109047370B (en) * | 2018-08-03 | 2021-04-13 | 陕西兴硕新材料科技有限公司 | Nickel-titanium shape memory alloy special-shaped pipe machining process |
| CN112474867B (en) * | 2020-11-02 | 2023-03-17 | 抚顺特殊钢股份有限公司 | Preparation method of high-temperature alloy hexagonal bar |
| CN112940331B (en) * | 2021-04-23 | 2022-09-16 | 江西恒东管业有限公司 | Flame-retardant Krah pipe and preparation method thereof |
| CN115870365B (en) * | 2023-02-04 | 2023-06-13 | 有研医疗器械（北京）有限公司 | Processing method of medical nickel-titanium pipe |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613614A (en) * | 1984-06-19 | 1986-01-09 | Hitachi Metals Ltd | Manufacture of shape memory alloy |
| JPH0679340A (en) * | 1992-05-26 | 1994-03-22 | Tokin Corp | Shape memory alloy pipe and its production |
| JPH09263916A (en) * | 1996-03-27 | 1997-10-07 | Sumitomo Metal Ind Ltd | Production of shape memory alloy tube |
| US5709021A (en) * | 1994-05-11 | 1998-01-20 | Memry Corp. | Process for the manufacture of metal tubes |
| JPH10137835A (en) * | 1996-10-31 | 1998-05-26 | Tokin Corp | Manufacture of shape memory alloy tube |
| JP2000104134A (en) * | 1998-09-28 | 2000-04-11 | Tokin Corp | Shape memory alloy composite body and its production |
| JP2001096307A (en) * | 1999-09-28 | 2001-04-10 | Tokin Corp | Method for manufacturing shape memory alloy tube |
-
2005
- 2005-05-10 CN CNB2005100392738A patent/CN1295037C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS613614A (en) * | 1984-06-19 | 1986-01-09 | Hitachi Metals Ltd | Manufacture of shape memory alloy |
| JPH0679340A (en) * | 1992-05-26 | 1994-03-22 | Tokin Corp | Shape memory alloy pipe and its production |
| US5709021A (en) * | 1994-05-11 | 1998-01-20 | Memry Corp. | Process for the manufacture of metal tubes |
| JPH09263916A (en) * | 1996-03-27 | 1997-10-07 | Sumitomo Metal Ind Ltd | Production of shape memory alloy tube |
| JPH10137835A (en) * | 1996-10-31 | 1998-05-26 | Tokin Corp | Manufacture of shape memory alloy tube |
| JP2000104134A (en) * | 1998-09-28 | 2000-04-11 | Tokin Corp | Shape memory alloy composite body and its production |
| JP2001096307A (en) * | 1999-09-28 | 2001-04-10 | Tokin Corp | Method for manufacturing shape memory alloy tube |
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| CN1686627A (en) | 2005-10-26 |
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