CN100372622C - Thermal internal high pressure formation method for light alloy tube (or pipe) - Google Patents
Thermal internal high pressure formation method for light alloy tube (or pipe) Download PDFInfo
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- CN100372622C CN100372622C CNB2005100104707A CN200510010470A CN100372622C CN 100372622 C CN100372622 C CN 100372622C CN B2005100104707 A CNB2005100104707 A CN B2005100104707A CN 200510010470 A CN200510010470 A CN 200510010470A CN 100372622 C CN100372622 C CN 100372622C
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Abstract
The present invention relates to a thermal internal high pressure forming method for light alloy pipes, which belongs to a forming method of pipe parts. The present invention solves the problem that the existing light alloy pipes have poor formability and difficult processing. The method has the steps: step 1, a mould 2 is heated to 150-500 DEG C; step 2, a tube blank 3 is put in the mould 2 heated in the step 1, and the mould 2 is closed; step 3, two ends of a punch head 1 and the tube blank 3 are contacted and sealed, and 150 to 500 DEG C of a hot state liquid medium 4 is injected in the tube blank 3 through a pipline 6; step 4, when the temperature of the mould 2 and the tube blank 3 reaches to 150-500 DEG C, the deformation of the tube blank 3 occurs by applying pressure, and the light alloy pipe parts are prepared. The present invention has the characteristics that after the light alloy pipes are heated to a proper temperature, the forming property is observably improved, and the light alloy tubular hollow variable cross-section parts with a complex shape can be formed once. Compared with the traditional technology, the parts produced by the method has the advantages of light weight, good rigidity and low cost.
Description
Technical field
The present invention relates to the manufacturing process of tubing parts.
Background technology
Energy crisis and environmental pollution are two hang-ups that the mankind face.Means of transport such as automobile, aircraft occupies significant proportion in energy resource consumption, vehicle exhaust also is main air pollution source.The deadweight that alleviates automobile, aircraft is to reduce one of measure of energy resource consumption and disposal of pollutants.The lightweight main path is to adopt light material and light body structure.Light material comprises aluminium alloy, magnesium alloy, titanium alloy and composite etc.Light body structure principal mode comprises overall structure, shell and hollow variable cross-section.For hollow variable cross-section parts, traditional manufacturing process is generally and strikes out shape two and half sheets earlier and then be welded into integral body, complex process, difficult quality guarantee.The hollow variable cross-section parts and internal high pressure forming is particularly suitable for being shaped.During internal high pressure forming, pipe deforms under the acting in conjunction of internal high pressure liquid and two ends axial load and finally fits the die forming part.Compare with traditional handicraft, the characteristics of internal high pressure forming are the hollow non-uniform members that can Integratively be shaped, and have light weight, good rigidity, and number of spare parts is few, can reduce assembling welding capacity and low cost and other advantages.At present, the material that internal high pressure forming adopted mainly is a welded still pipe.In order further to alleviate construction weight, can adopt alloy in lightweight such as aluminium alloy, magnesium alloy.But, the major defect of aluminium alloy is that formability is poor under the normal temperature, and magnesium alloy is difficult to be shaped at normal temperatures, so adopt at normal temperatures in the inside high-pressure forming method forming process because of not applying axial load, crossing conference when the tube bulge amount makes the tube wall attenuate until breaking, and the pipe thickness after being shaped is inhomogeneous, and is just more difficult for the complicated hollow variable cross-section parts that are shaped.
Summary of the invention
The present invention adopts in the inside high-pressure forming method forming process because of not applying axial load at normal temperatures in order to solve existing light-alloy tubing, crossing conference when the tube bulge amount makes the tube wall attenuate until breaking, and the pipe thickness after being shaped is inhomogeneous, problem to the complicated hollow variable cross-section parts difficulty that is shaped, provide a kind of light-alloy tubing hot inside high-pressure forming method, the concrete technical scheme that addresses the above problem is as follows:
The hot inside high-pressure forming method of light-alloy tubing of the present invention is realized by the following step:
Step 1, mould 2 is heated to 150～500 ℃;
Step 2, pipe 3 is put into through step 1 heated mold 2, mould 2 closures;
Step 3, drift 1 is contacted and seals with the both ends of pipe 3, in pipe 3, inject 150～500 ℃ hot liquid medium 4 by pipeline 6 then;
Step 4, when the temperature of mould 2, pipe 3 and hot liquid medium 4 reaches 150～500 ℃, axial displacement by control slip drift (1) or axial thrust and with pipe (3) in the pressure of hot liquid medium (4) be complementary, pipe 3 is deformed, promptly get the light-alloy tubing parts of preparing design.
The characteristics of the hot inside high-pressure forming method of the hollow variable cross-section parts of light-alloy tubing of the present invention are, lightweight tubing such as aluminium alloy, magnesium alloy are heated to proper temperature, can significantly improve its forming property, make full use of simultaneously the flexible high advantage of inside high-pressure forming method again, can go out complex-shaped light-alloy tubular, hollow variable cross-section parts by once-forming.Compare with traditional handicraft, the part that this method is produced has light weight, good rigidity, number of spare parts is few and cost is low advantage.Be suitable for the shaping of automobile exhaust system special piece, subframe, instrument board support, body shell, hollow shaft class part and complex pipes etc.
Description of drawings
Fig. 1 is the cutaway view of hot internal high pressure forming of tubing and mould original state structure, and Fig. 2 is the cutaway view of hot internal high pressure forming of tubing and mould end of a period status architecture.
1 is drift among the figure, the 2nd, and mould, the 3rd, pipe, the 4th, hot liquid, the 5th, heater, the 6th, pipeline.
The specific embodiment
The specific embodiment one:
Step 1, at first mould 2 is heated to 150～500 ℃; The temperature of mould 2 can be controlled by the temperature of heater 5 (heater 5 adopts thermal resistance or Circulation and Hot Oil Spray mode) that is provided with on the mould 2 and the hot liquid medium 4 (hot liquid medium 4 adopts deep fat) that injects;
Step 2, aluminium alloy or magnesium alloy pipe 3 normal temperature is following or the process preheating are put into through step 1 heated mold 2, with mould 2 closures;
Step 3, will contact with the both ends of pipe 3 through the slip drift 1 at 2 middle parts of the mould after the step 2 closure and adopt high pressure sealing after, be that 150～500 ℃ and pressure are hot liquid medium 4 (see figure 1)s of 0～250Mpa by pipeline 6 implantation temperature in pipe 3;
Step 4, when the temperature through mould 2, pipe 3 and the hot liquid medium 4 of step 3 is 150～500 ℃ of scopes, be complementary between the axial displacement by control slip drift 1 or the pressure of the hot liquid medium 4 in axial thrust and the pipe 3, the pressure of hot liquid medium 4 is 0～250Mpa, make pipe 3 produce distortion, finally prepare light-alloy tubing parts shown in Figure 2.
Aluminium alloy and magnesium alloy its deformation nature after being heated to uniform temperature will significantly improve.For aluminium alloy conical part pull and stretch, room temperature pull and stretch height is 35mm, and when temperature was increased to 250 ℃, the pull and stretch height reached 60mm.The pull and stretch ratio of magnesium alloy pipe in the time of 250 ℃ reaches 3.0, surpassed steel plate drawing forming limit (pull and stretch is than 2.2) at normal temperatures.
In the process that light-alloy tubing parts are shaped, the pressure matching relationship between the two of hot liquid medium 4 in the axial displacement of control slip drift 1 or axial thrust and the pipe 3, simultaneously, control the temperature of pipe 3 and the temperature of mould 2 and pipe 3 contact zones.The heating of pipe 3 can be controlled by the hot liquid medium 4 of inside and the temperature of mould 2.
Method of the present invention can be prepared difform light-alloy tubing parts by Mould design.
The specific embodiment two: the difference of the present embodiment and the specific embodiment one is that the mould 2 of step 1 is heated to 150 ℃, and the temperature of mould 2, pipe 3 and hot liquid medium 4 is 500 ℃ in the step 4.Other step is identical with the specific embodiment one.
The specific embodiment three: the difference of the present embodiment and the specific embodiment one is that the mould 2 of step 1 is heated to 300 ℃, and the temperature of pipe 3 and hot liquid medium 4 is 300 ℃ in the step 4, and the pressure of hot liquid medium 4 is 150Mpa.Other step is identical with the specific embodiment one.
The specific embodiment four: the difference of the present embodiment and the specific embodiment one is that the mould 2 of step 1 heats 500 ℃, and the temperature of pipe 3 and hot liquid medium 4 is 150 ℃ in the step 4, and the pressure of hot liquid medium 4 is 250Mpa.Other step is identical with the specific embodiment one.
Claims (5)
1. the hot inside high-pressure forming method of light-alloy tubing is characterized in that this method is realized by the following step:
Step 1, mould (2) is heated to 150～500 ℃;
Step 2, pipe (3) is put into through step 1 heated mold (2), mould (2) closure;
Step 3, the both ends of drift (1) with pipe (3) are contacted and seal, in pipe (3), inject 150～500 ℃ hot liquid medium (4) by pipeline (6) then;
Step 4, when the temperature of mould (2), pipe (3) and hot liquid medium (4) reaches 150～500 ℃, the matching relationship of the pressure of the interior hot liquid medium (4) of axial displacement and pipe (3) by control drift (1), control the temperature of pipe (3) and the temperature of pipe (3) and mould (2) contact zone simultaneously, pipe (3) is deformed, can prepare the light-alloy tubing parts of design.
2. the hot inside high-pressure forming method of light-alloy tubing according to claim 1 is characterized in that the pressure of the hot liquid medium (4) in the step 4 is 0～250Mpa.
3. the hot inside high-pressure forming method of light-alloy tubing according to claim 1 and 2 is characterized in that the mould (2) of step 1 is heated to 150 ℃, and the temperature of mould in the step 4 (2), pipe (3) and hot liquid medium (4) is 500 ℃.
4. the hot inside high-pressure forming method of light-alloy tubing according to claim 1 and 2, the mould (2) that it is characterized in that step 1 is heated to 300 ℃, the temperature of pipe in the step 4 (3) and hot liquid medium (4) is 300 ℃, and the pressure of hot liquid medium (4) is 150Mpa.
5. the hot inside high-pressure forming method of light-alloy tubing according to claim 1 and 2, the mould (2) that it is characterized in that step 1 is heated to 500 ℃, the temperature of pipe in the step 4 (3) and hot liquid medium (4) is 150 ℃, and the pressure of hot liquid medium (4) is 250Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100104707A CN100372622C (en) | 2005-10-25 | 2005-10-25 | Thermal internal high pressure formation method for light alloy tube (or pipe) |
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| CNB2005100104707A CN100372622C (en) | 2005-10-25 | 2005-10-25 | Thermal internal high pressure formation method for light alloy tube (or pipe) |
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| CN1751819A CN1751819A (en) | 2006-03-29 |
| CN100372622C true CN100372622C (en) | 2008-03-05 |
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Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100431733C (en) * | 2006-10-11 | 2008-11-12 | 梁雪华 | Hydraulic expansion forming process |
| CN101219451B (en) * | 2008-01-25 | 2010-06-02 | 哈尔滨工业大学 | Method for forming long tube part with partial convexity |
| CN101551244B (en) * | 2009-05-18 | 2010-09-29 | 哈尔滨工业大学 | Squeeze-expanding test method of tube deformation performance |
| CN101870152B (en) * | 2010-07-06 | 2012-12-05 | 哈尔滨工业大学 | Flexible die forming method with approximatively equal wall thickness for variable-diameter part |
| CN102049443B (en) * | 2010-11-12 | 2012-12-05 | 哈尔滨工业大学 | Hydraulic forming method of asymmetric hollow pipe fitting of high expansion capacity |
| CN102921791B (en) * | 2012-11-26 | 2015-05-20 | 哈尔滨理工大学 | Section-variable hollow component forming device and method |
| CN104985043B (en) * | 2015-01-30 | 2017-04-19 | 西北工业大学 | Electromagnetic induction heating bulging apparatus and shaping method for metal conductor pipe |
| CN104646480B (en) * | 2015-03-02 | 2016-09-28 | 安徽工业大学 | The method and device that a kind of light-alloy reducer pipe shapes |
| CN104874663B (en) * | 2015-04-21 | 2017-07-28 | 西北工业大学 | A kind of increment type temperature difference expanding method of metal pipe material |
| CN105537363A (en) * | 2015-12-15 | 2016-05-04 | 南京航空航天大学 | Molding device and method for heat expansion of aluminum alloy hollow part |
| CN107626803B (en) * | 2017-11-15 | 2018-11-16 | 重庆大学 | Alloy pipe heating gas expansion forming mold and manufacturing process based on gasoline combustion |
| CN108856441B (en) * | 2018-06-21 | 2020-01-14 | 哈尔滨工业大学 | Pipe thermal medium internal pressure forming method based on molten glass |
| CN108941303B (en) * | 2018-06-25 | 2019-12-03 | 哈尔滨工业大学 | A kind of hot internal pressure manufacturing process of abnormity variable cross-section pipe fitting axial difference pressure |
| CN109433864A (en) * | 2018-11-14 | 2019-03-08 | 航天特种材料及工艺技术研究所 | Big L/D ratio ultra-thin-wall stainless steel cylindrical member straightening method and tooling |
| CN109500195B (en) * | 2018-11-19 | 2019-11-29 | 大连理工大学 | A kind of special tubes and pipes of aluminium alloy part ultralow temperature pressure medium manufacturing process |
| CN109926487A (en) * | 2019-04-11 | 2019-06-25 | 海宁市新艺机电有限公司 | Cleaning-nursing apparatus body shell semi-finished product, finished product manufacture method and molding machine |
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| US6067831A (en) * | 1997-12-23 | 2000-05-30 | Gkn Sankey | Hydroforming process |
| JP2003049246A (en) * | 2001-05-31 | 2003-02-21 | Kawasaki Steel Corp | Welded steel pipe having excellent hydroforming property and production method therefor |
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| CN1613569A (en) * | 2004-07-28 | 2005-05-11 | 捷安特(中国)有限公司 | Heat hydraulic inner shaping method and bicycle frames |
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| CN1751819A (en) | 2006-03-29 |
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Effective date of registration: 20210303 Address after: Room 1107, 11 / F, National University Science Park, Harbin Institute of technology, No. 434, youyou street, Nangang District, Harbin City, Heilongjiang Province, 150006 Patentee after: Harbin Institute of Technology Asset Management Co.,Ltd. Patentee after: Yuan Shijian Patentee after: He Zhubin Address before: 150001 No. 92 West straight street, Nangang District, Heilongjiang, Harbin Patentee before: HARBIN INSTITUTE OF TECHNOLOGY |
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Effective date of registration: 20210326 Address after: 301900 south of Cangyuan street, east of Fuqiang Road, jingjinzhouhe science and Technology Industrial Park, Jizhou District, Tianjin (5m away from Fuqiang Road) Patentee after: Tianjin Hagong Yongxing Technology Co.,Ltd. Address before: Room 1107, 11 / F, National University Science Park, Harbin Institute of technology, No. 434, youyou street, Nangang District, Harbin City, Heilongjiang Province, 150006 Patentee before: Harbin Institute of Technology Asset Management Co.,Ltd. Patentee before: Yuan Shijian Patentee before: He Zhubin |