CN101259501A - Tubular product internal high-pressure forming special-shaped cross section sealing method and sealing punch - Google Patents
Tubular product internal high-pressure forming special-shaped cross section sealing method and sealing punch Download PDFInfo
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- CN101259501A CN101259501A CNA2008100643250A CN200810064325A CN101259501A CN 101259501 A CN101259501 A CN 101259501A CN A2008100643250 A CNA2008100643250 A CN A2008100643250A CN 200810064325 A CN200810064325 A CN 200810064325A CN 101259501 A CN101259501 A CN 101259501A
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Abstract
A sealing method for a high pressure shaping allotype section in a tubular product and a sealing formed punch relate to a sealing method for the shaping of a tubular product and a sealing formed punch. The invention solves the problems of die and tubular product wasts caused by the fact that transition sections are respectively needed to be obligated at two ends of a tube blank to be processed and are needed to be treated into a round section which is used for the sealing during the high pressure shaping in the existing allotype section component. The method of the invention comprises the steps: the section of the end part of the tube blank is pre-formed; then the tube blank is put into a lower die and an upper die is closed; sealing two ends of the tube blank are sealed directly by the sealing formed punch and filled in liquid; the tube blank is put on pressure; and the needed workpiece is instantly formed after pressure relief. The rectifying section (2), the sealing section (3) and the sealing connecting rod (4) of the sealing formed punch are fixedly connected to form a body from pro to post; the front end of the rectifying section (2) is provided with a transition round angle (1). The method of the invention has the advantages of good sealing effect and saving the tube blank material, etc. The sealing formed punch of allotype section of the invention has the advantages of the flexible and free section forms, the good commonality and the energy conservation.
Description
Technical field
The present invention relates to a kind of encapsulating method and sealing punch of forming tubular product.
Background technology
In recent years; along with growing continuously and fast of auto output and recoverable amount; social energy resource supply, environmental protection and traffic safety are brought tremendous influence day by day; and the light-weight design of automobile is important means and the method that realizes energy-saving and emission-reduction with making, and also is one of trend of Modern Manufacturing Technology development.The lightweight of automobile is except replacing the ferrous materials approach by employing high-strength steel, almag, engineering plastics, composite, by adopting advanced design concept, obtaining loading variation, homogeneous texture and the best geometry of best engineering combination, the best and adopting advanced forming technology to come finished parts also is the light-weighted effective way of automobile.According to statistics, for certain loss of weight target, adopt the contribution of engineering design and manufacturing loss of weight to be approximately 30%～40%, adopt the contribution of lightweight material loss of weight to be approximately 60%～70%.
Special-shaped variable cross-section hollow-core construction design adapts to different load-up conditions by rational variable cross-section design, and not only alleviate the quality of structure but also made full use of the strength and stiffness of material, be the important channel of present vehicle structure loss of weight.Increase part quality but traditional punching press welding procedure exists the welded flange limit when making special-shaped variable cross-section hollow structural component, the cross section is that non-enclosed construction reduces problems such as intensity.Present special-shaped variable cross-section hollow-core construction generally adopts the manufacturing of internal high pressure forming technology, and its technical process is: one, straight tube blank is bent to the shape identical or close with axis of workpiece (under the situation if desired); Two, be out of shape in advance by mechanical presses or other preform mode cross section, make its width (under the situation if desired) less than mold cavity with tubing; Three, pipe is put in the internal high pressure forming mould, pressurization is fitted tubing generation plastic deformation and mould and is configured as required workpiece.
The pressure of internal high pressure forming is very high, can reach 400MPa, under so high pressure, the sealing of tubing is the key that is shaped, the sealing means that adopts mainly is the circular cross-section sealing at present, by means of the symmetry of circle, adopts circular cross-section to realize the sealing of tubing.The limitation of circular cross-section sealing is that the end surface shape that only limits to tubing is a circular cross-section.If the end face of part to be processed is an on-circular cross-section, for example rectangle, trapezoidal or other profiled-cross-section shape are in order to realize sealing, needing increases by one section changeover portion, and on-circular cross-section is transited into circular cross-section, will certainly cause changeover portion complex-shaped like this, waste tubing, the utilization rate of material is low.For example, part length is 800mm, every end changeover portion 100mm, and the two ends changeover portion is 200mm altogether, and the length of blank is 1000mm, and stock utilization only is 80%.The length of part is short more, and the utilization rate of material is low more, and when the length of part was 200mm, the utilization rate of material had only 50%.
Summary of the invention
A kind of tubular product internal high-pressure forming special-shaped cross section sealing method and sealing punch have been the purpose of this invention is to provide, when having solved existing profiled-cross-section member internal high pressure forming, it the two ends of pipe to be processed need be reserved one section changeover portion respectively, and this on-circular cross-section changeover portion is processed into circular cross-section is used for sealing, so that cause the problem of the waste of mould, tubing.
Technical scheme of the present invention is: a kind of tubular product internal high-pressure forming special-shaped cross section sealing method, it is realized according to following steps: one, the pipe end cross-sectional is out of shape in advance, make end cross-sectional become the shape identical or close with the mold cavity cross section, then pipe is placed in the bed die closed mold; Two, the two ends with pipe directly seal with sealing punch, charge into liquid in pipe; Three, axially inwardly advance along pipe simultaneously to pipe pressurization 0～400MPa and with the sealing punch at pipe two ends; Four, release and with odd-shaped cross section sealing punch return, required workpiece promptly is shaped.
The realization of method noted earlier must could realize by sealing punch, described sealing punch is made up of rectification section, seal section, the bar that is tightly connected, described rectification section, seal section and the affixed successively from front to back formation one of the bar that is tightly connected, the described front end of correcting section is provided with knuckle, the cross-sectional area of described seal section is less than the cross-sectional area of the bar that is tightly connected, and the cross-sectional area of described rectification section becomes big gradually by front of motor to link.
The present invention has following beneficial effect: the inventive method has advantages such as good sealing effect, saving blank tube material, for special-shaped cross section sealing, has cancelled the changeover portion of part to be processed, and the utilization rate of material has reached 100% in theory.In fact only needing one section very short seal section, is 1000mm for charge length for example, and the seal section length of every end is 10mm, and machinable part length can reach 980mm, and the practical efficiency of material has also reached 98%.Simultaneously, odd-shaped cross section sealing punch of the present invention has the advantage that section form changes freedom, versatility is good, seal section is short, save the energy.
Description of drawings
Fig. 1 is installed in structural representation in the pipe with sealing punch of the present invention, Fig. 2 is that sealing punch of the present invention is installed in the structural representation on the forming machine, Fig. 3 is the front view of square-section sealing punch, Fig. 4 is the left view of Fig. 3, and Fig. 5 is the front view of trapezoid cross section sealing punch, and Fig. 6 is the left view of Fig. 5, Fig. 7 is the vertical view of Fig. 5, Fig. 8 is the front view of regular hexagonal section sealing punch, and Fig. 9 is the left view of Fig. 8, and Figure 10 is the vertical view of Fig. 8.
The specific embodiment
The specific embodiment one: as shown in Figure 1 and Figure 2, the tubular product internal high-pressure forming special-shaped cross section sealing method of present embodiment is realized according to following steps: one, the pipe end cross-sectional is out of shape in advance, make end cross-sectional become the shape identical or close with the mold cavity cross section, then pipe is placed in the bed die closed mold; Two, the two ends with pipe directly seal with sealing punch, charge into liquid in pipe; Three, axially inwardly advance along pipe simultaneously to pipe pressurization 0～400MPa and with the sealing punch at pipe two ends; Four, release and with odd-shaped cross section sealing punch return, required workpiece promptly is shaped.
The specific embodiment two: as shown in Figure 1 and Figure 2, the sealing punch of present embodiment is made up of rectification section 2, seal section 3, the bar 4 that is tightly connected, described rectification section 2, seal section 3 and the affixed successively from front to back formation one of the bar 4 that is tightly connected, the described front end of correcting section 2 is provided with knuckle 1, the cross-sectional area of described seal section 3 is less than the cross-sectional area of the bar 4 that is tightly connected, and the cross-sectional area of described rectification section 2 becomes big gradually by front of motor to link.Link together by connecting rod 4 and other drive unit, for example plunger cylinder etc. utilizes the motion of drive unit to realize applying of seal load.
The specific embodiment three: shown in Fig. 3～4, the cross section of the described sealing punch of present embodiment is a rectangle.So design, the cross section that is fit to part to be processed are the sealing under the rectangle situation.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment four: shown in Fig. 5～7, the cross section of the described sealing punch of present embodiment is trapezoidal.So design, the cross section that is fit to part to be processed are the sealing under the trapezoidal situation.Other composition is identical with the specific embodiment two with annexation.
The specific embodiment five: shown in Fig. 8～10, the cross section of the described sealing punch of present embodiment is a regular hexagon.So design, the cross section that is fit to part to be processed are the sealing under the regular hexagon situation.Other composition is identical with the specific embodiment two with annexation.
Operation principle:
Be placed on the bed die 11 pipe 5 and closed mold 8, under the driving of drive unit cross cylinder 10, knuckle 1 on left side sealing punch 9, the sealing punch 12 at first contacts with pipe 5, because the sectional dimension of correcting section 2 is significantly less than the size of pipe 5, correct section 2 and be easy to enter pipe 5 inside, after this seal section 3 enters pipe 5, and the bar 4 that is tightly connected subsequently contacts with pipe 5, make pipe 5 deform and be tightly connected bar 4 applyings closely, reach the effect of sealing.After the sealing, high-voltage power supply 14 charges into highly pressurised liquid for the inner chamber of pipe 5 by topping up pipe 13, makes pipe recline mould inside die cavity and the required workpiece that is shaped (referring to Fig. 1 and Fig. 2) under interior pressure (highly pressurised liquid), axial compressive force and forcing press 6 synergy.
Claims (5)
1, a kind of tubular product internal high-pressure forming special-shaped cross section sealing method, it is characterized in that it realizes according to following steps: one, the pipe end cross-sectional is out of shape in advance, make end cross-sectional become the shape identical or close, then pipe is placed in the bed die closed mold with the mold cavity cross section; Two, the two ends with pipe directly seal with sealing punch, charge into liquid in pipe; Three, axially inwardly advance along pipe simultaneously to pipe pressurization 0～400MPa and with the sealing punch at pipe two ends; Four, release and with odd-shaped cross section sealing punch return, required workpiece promptly is shaped.
2, the sealing punch in the described method of realization claim 1, it is characterized in that it by correct section (2), a seal section (3), the bar that is tightly connected (4) is formed, described rectification section (2), seal section (3) and the affixed successively from front to back formation one of the bar that is tightly connected (4), the described front end of correcting section (2) is provided with knuckle (1), the cross-sectional area of described seal section (3) is less than the cross-sectional area of the bar that is tightly connected (4), and the cross-sectional area of described rectification section (2) becomes big gradually by front of motor to link.
3, sealing punch according to claim 2, the cross section that it is characterized in that described sealing punch is a rectangle.
4, sealing punch according to claim 2, the cross section that it is characterized in that described sealing punch is a regular hexagon.
5, sealing punch according to claim 2, the cross section that it is characterized in that described sealing punch is trapezoidal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100643250A CN101259501A (en) | 2008-04-18 | 2008-04-18 | Tubular product internal high-pressure forming special-shaped cross section sealing method and sealing punch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100643250A CN101259501A (en) | 2008-04-18 | 2008-04-18 | Tubular product internal high-pressure forming special-shaped cross section sealing method and sealing punch |
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| CN101259501A true CN101259501A (en) | 2008-09-10 |
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| CNA2008100643250A Pending CN101259501A (en) | 2008-04-18 | 2008-04-18 | Tubular product internal high-pressure forming special-shaped cross section sealing method and sealing punch |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102327946A (en) * | 2010-06-15 | 2012-01-25 | 比尔克特韦尔克有限公司 | Method for manufacturing valve housing |
| CN102962304A (en) * | 2012-12-07 | 2013-03-13 | 哈尔滨工业大学 | Liquid filling shearing bending formation method for small bending radius rectangular tube |
| CN103846332A (en) * | 2014-03-02 | 2014-06-11 | 首钢总公司 | Intelligent inner high-pressure forming method suitable for different length tubes |
| CN106311860A (en) * | 2015-06-23 | 2017-01-11 | 宝山钢铁股份有限公司 | Hydraulic forming sealing method based on end surface reaction |
| CN111195673A (en) * | 2020-01-13 | 2020-05-26 | 哈尔滨工业大学 | Liquid filling press forming device for variable cross-section special-shaped pipe fitting |
| CN111872212A (en) * | 2020-07-27 | 2020-11-03 | 佛山市永恒液压机械有限公司 | Pipe sealing method |
| CN112108555A (en) * | 2020-07-27 | 2020-12-22 | 佛山市永恒液压机械有限公司 | Clamping and pressing pipe forming method through clamping and pressing pipe equipment |
| CN113369364A (en) * | 2021-07-26 | 2021-09-10 | 佛山市永恒液压机械有限公司 | Method for forming clamping and pressing pipe |
| CN114029389A (en) * | 2021-11-09 | 2022-02-11 | 北京航星机器制造有限公司 | Special-shaped thin-wall cavity profile composite precise forming device and method |
| CN114653806A (en) * | 2022-03-01 | 2022-06-24 | 哈尔滨工业大学（威海） | Preforming method for high-strength steel variable-diameter tubular part |
| CN115255107A (en) * | 2022-07-05 | 2022-11-01 | 保隆(安徽)汽车配件有限公司 | Hydraulic forming sealing head and design method thereof |
-
2008
- 2008-04-18 CN CNA2008100643250A patent/CN101259501A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102327946B (en) * | 2010-06-15 | 2016-03-30 | 比尔克特韦尔克有限公司 | Manufacture the method for valve chest |
| CN102327946A (en) * | 2010-06-15 | 2012-01-25 | 比尔克特韦尔克有限公司 | Method for manufacturing valve housing |
| CN102962304A (en) * | 2012-12-07 | 2013-03-13 | 哈尔滨工业大学 | Liquid filling shearing bending formation method for small bending radius rectangular tube |
| CN103846332A (en) * | 2014-03-02 | 2014-06-11 | 首钢总公司 | Intelligent inner high-pressure forming method suitable for different length tubes |
| CN103846332B (en) * | 2014-03-02 | 2015-11-18 | 首钢总公司 | A kind of intellectuality adapts to the inside high-pressure forming method of different length pipe |
| CN106311860A (en) * | 2015-06-23 | 2017-01-11 | 宝山钢铁股份有限公司 | Hydraulic forming sealing method based on end surface reaction |
| CN106311860B (en) * | 2015-06-23 | 2018-12-07 | 宝山钢铁股份有限公司 | Hydroforming encapsulating method based on end face counter-force |
| CN111195673B (en) * | 2020-01-13 | 2021-01-12 | 哈尔滨工业大学 | Liquid filling press forming device for variable cross-section special-shaped pipe fitting |
| CN111195673A (en) * | 2020-01-13 | 2020-05-26 | 哈尔滨工业大学 | Liquid filling press forming device for variable cross-section special-shaped pipe fitting |
| CN111872212A (en) * | 2020-07-27 | 2020-11-03 | 佛山市永恒液压机械有限公司 | Pipe sealing method |
| CN112108555A (en) * | 2020-07-27 | 2020-12-22 | 佛山市永恒液压机械有限公司 | Clamping and pressing pipe forming method through clamping and pressing pipe equipment |
| CN112108555B (en) * | 2020-07-27 | 2022-04-15 | 佛山市永恒液压机械有限公司 | Clamping and pressing pipe forming method through clamping and pressing pipe equipment |
| CN111872212B (en) * | 2020-07-27 | 2022-05-17 | 佛山市永恒液压机械有限公司 | Pipe sealing method |
| CN113369364A (en) * | 2021-07-26 | 2021-09-10 | 佛山市永恒液压机械有限公司 | Method for forming clamping and pressing pipe |
| CN113369364B (en) * | 2021-07-26 | 2022-07-12 | 佛山市永恒液压机械有限公司 | Method for forming pressure clamping pipe |
| CN114029389A (en) * | 2021-11-09 | 2022-02-11 | 北京航星机器制造有限公司 | Special-shaped thin-wall cavity profile composite precise forming device and method |
| CN114653806A (en) * | 2022-03-01 | 2022-06-24 | 哈尔滨工业大学（威海） | Preforming method for high-strength steel variable-diameter tubular part |
| CN114653806B (en) * | 2022-03-01 | 2023-12-22 | 哈尔滨工业大学（威海） | Preforming method for high-strength steel reducing tubular part |
| CN115255107A (en) * | 2022-07-05 | 2022-11-01 | 保隆(安徽)汽车配件有限公司 | Hydraulic forming sealing head and design method thereof |
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Open date: 20080910 |