CN103920787A - Hydraulic forming method for pipe fitting torsion beam - Google Patents
Hydraulic forming method for pipe fitting torsion beam Download PDFInfo
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- CN103920787A CN103920787A CN201410119429.2A CN201410119429A CN103920787A CN 103920787 A CN103920787 A CN 103920787A CN 201410119429 A CN201410119429 A CN 201410119429A CN 103920787 A CN103920787 A CN 103920787A
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Abstract
Discloses is a hydraulic forming method for a pipe fitting torsion beam. The method includes the following steps: (1) determining structural features of the pipe fitting torsion beam, sequentially dividing the pipe fitting torsion beam into three regions of a middle section, a transition section and an end portion from the middle to two ends, selecting a feature section for each region, and acquiring feature section curves, namely a V shape, a U shape and a rectangle, according to the feature sections; (2) subjecting a round pipe serving as a raw material to formation by adopting a one-step or step-by-step forming mode according to features of the section curves; (3) adopting a hydro-bugling method, after shutoff of a die, injecting high pressure oil into a pipe fitting, and bulging the inner wall face of the pipe fitting to a die profile through pressure so as to achieve a preset torsion beam profile. The step-by-step forming mode is adopted to process and form each part of the torsion beam, so that off tracking and movement of the pipe fitting are avoided during processing, the problems of corrugation and overlapping caused by non-uniform material distribution in the forming process can be prevented, and squeezing and damage to the die due to material stacking are prevented.
Description
Technical field
The present invention relates to fittings hydraulic formation manufacturing process field, relate in particular to a kind of hydraulic forming method of pipe fitting torsion beam.
Background technology
Automobile axle torsion beam is one of critical component of automobile, and Main Function is the bob of balance left and right wheels, to reduce rocking of vehicle, keeps the steady of vehicle, and torsion beam itself can play the effect of QS, improves vehicle roll rigidity.Each building block of the torsion beam of traditional structure mostly is metal plate punching and is shaped, and crossbeam torsional rigidity is relatively little, and therefore increasing a stabiliser bar improves its torsional rigidity, and new construction torsion beam adopts pipe structure, cross section is closed cross-section configuration, and torsional rigid is higher, has therefore cancelled stabiliser bar.
Compare with fittings hydraulic formation torsion beam, tradition metal plate punching part structure torsion beam manufacturing process is more, welding deformation less stable, because crossbeam two ends become hatch frame, itself and trailing arm lap weld can not form enclosed construction, the discontinuity of its commissure during torsion beam work, near weld seam, there will be stress wherein, easily produce fatigue rupture, for guaranteeing the reliability of product, therefore higher to its welding process requirement, and be difficult to control.
Japan Patent JP2010534163T discloses a kind of method of manufacturing technology of pipe fitting torsion beam part, the method adopts composite die mechanism method, by preform and hydroforming combination, complete the processing of torsion beam part, the method difficult point is composite die design and synchronous station design, and mould complexity and the accuracy of manufacture are had relatively high expectations.
Summary of the invention
The object of the present invention is to provide a kind of fittings hydraulic formation torsion beam substep manufacturing process, adopt substep forming mode, each position of torsion beam part is progressively shaped, not only can in process, avoid pipe fitting sideslip and play, and can prevent that in forming process, the wrinkling and folded material problem of generation prevents because extruding and the destruction that material stacking produces mould because of Distribution of materials inequality.
For achieving the above object, technical scheme of the present invention is:
A hydraulic forming method for pipe fitting torsion beam, comprises the following steps:
1) determine pipe fitting torsion beam architectural feature, pipe fitting torsion beam is divided into interlude, changeover portion and San Ge region, end successively from centre to two ends, and to each selected characteristic cross section, region, according to characteristic cross-section, obtain characteristic cross-section line, i.e. V-arrangement, U-shaped, rectangle;
2) according to above-mentioned section line feature, to the regional of the pipe as raw material, adopt a step or substep forming mode to form;
3) each position of torsion beam is shaped and finishes rear employing hydraulic expansion method, after hydraulic die matched moulds, seal head is by after pipe end sealing, and hydraulic oil injects in pipe fitting, by pressure by pipe fitting inner wall face bulging to die face, thereby reach predetermined torsion beam profile.
Further, according to section line feature, to regional, adopt substep forming mode to form, generally adopt 2～5 passages to be shaped and process.
Again, the section line feature V-arrangement feature of corresponding torsion beam interlude, divides and completes the processing that is shaped for four times; Wherein, the first operation is pressed into triangle by pipe, then the shaping of the second～four operation employing substep, and forming V-shape cross section is progressively shaped triangular-section.
Have again, according to the section line feature U-shaped feature of torsion beam changeover portion, divide and complete processing three times; Wherein, the first operation is pressed into semicircle by circle, then is out of shape the U-shaped structure that forms indent successively.
According to the cross sectional shape rectangle feature of torsion beam end, divide and form processing three times, progressively circle is pressed into rectangle; During shaping, in pipe, establish the cushion block that can prevent that lower plane from subsiding.
Beneficial effect of the present invention:
The present invention is by the torsion beam part of complicated shape feature is processed according to multistep forming process, meets the requirement of processing, for the processing and manufacturing of fittings hydraulic formation torsion beam part provides a kind of method of manufacturing technology.By increasing pipe fitting torsion beam part thickness or increasing character shape (as muscle) at region of stress concentration, can effectively improve stress and concentrate, thereby improve durability.
Accompanying drawing explanation
Fig. 1 is the stereogram of torsion beam part;
Fig. 2 is the front view of torsion beam part;
Fig. 3 is the A-A(interlude of Fig. 2) cutaway view Amplified image;
Fig. 4 is the B-B(changeover portion of Fig. 2) cutaway view Amplified image;
Fig. 5 is the C-C(end of Fig. 2) cutaway view Amplified image;
Fig. 6～Figure 10 is the substep shaping schematic diagram of torsion beam interlude of the present invention;
Figure 11～Figure 14 is the substep shaping schematic diagram of torsion beam changeover portion of the present invention;
Figure 15～Figure 18 is the substep shaping schematic diagram of torsion beam of the present invention end;
Figure 19 is the schematic diagram that torsion beam of the present invention adopts cushion block when end formed;
Figure 20 is the schematic diagram of hydroforming topping up of the present invention and end part seal;
Figure 21 is the schematic diagram of torsion beam machine-shaping of the present invention.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention will be further described.
Referring to Fig. 1～Figure 21, a kind of hydroforming torsion beam part substep forming process of the present invention, comprises the following steps:
1) determine pipe fitting torsion beam 1 architectural feature, pipe fitting torsion beam 1 is divided into interlude, changeover portion and San Ge region, end successively from middle to two ends, and to each selected characteristic cross section, region, according to characteristic cross-section, obtains characteristic cross-section line, be V-arrangement, U-shaped, rectangle, as shown in Fig. 3～Fig. 5;
2) according to above-mentioned section line feature, to the regional of the pipe as raw material, adopt a step or substep forming mode to form;
Wherein, the section line feature V-arrangement feature of corresponding torsion beam 1 interlude, divides and completes the processing that is shaped for four times; Wherein, the first operation is pressed into triangle by pipe, adopts and with the profile of angle, pipe is located, and prevents sideslip; According to the features of shape in final V-arrangement cross section, material is carried out to reasonable distribution simultaneously, prevent the wrinkling and folded material causing due to Distribution of materials inequality; The second～four operation adopts substep to be shaped again, and forming V-shape cross section is progressively shaped triangular-section.
According to the section line feature U-shaped feature of torsion beam 1 changeover portion, divide and complete processing three times; Wherein, the first operation is pressed into semicircle by circle, and its feature is, according to changeover portion features of shape, material to be carried out to reasonable distribution, prevents that subsiding from appearring in net shape recess or folded material; Then, be more successively out of shape the U-shaped structure that forms indent.
According to the cross sectional shape rectangle feature of torsion beam 1 end, divide and form processing three times, progressively circle is pressed into rectangle; During shaping, in pipe, establish the cushion block 2 that can prevent that lower plane from subsiding, guarantee that hydroforming operation seal head 4 enters pipe end smoothly simultaneously, set up sealing;
3) torsion beam 1 each position is shaped and finishes rear employing hydraulic expansion method, after mould 3 matched moulds, seal head 4 is by after torsion beam 1 pipe end sealing, and hydraulic oil injects in pipe fitting, by pressure by pipe fitting inner wall face bulging to die face, thereby reach predetermined torsion beam profile.
Claims (5)
1. a hydraulic forming method for pipe fitting torsion beam, comprises the following steps:
1) determine pipe fitting torsion beam architectural feature, pipe fitting torsion beam is divided into interlude, changeover portion and San Ge region, end successively from centre to two ends, and to each selected characteristic cross section, region, according to characteristic cross-section, obtain characteristic cross-section line, i.e. V-arrangement, U-shaped, rectangle;
2) according to above-mentioned section line feature, to the regional of the pipe as raw material, adopt a step or substep forming mode to form;
3) each position of torsion beam is shaped and finishes rear employing hydraulic expansion method, after hydraulic die matched moulds, seal head is by after pipe end sealing, and hydraulic oil injects in pipe fitting, by pressure by pipe fitting inner wall face bulging to die face, thereby reach predetermined torsion beam profile.
2. the hydraulic forming method of pipe fitting torsion beam as claimed in claim 1, is characterized in that: according to section line feature, to regional, adopt substep forming mode to form, generally adopt 2～5 passages to be shaped and process.
3. the hydraulic forming method of pipe fitting torsion beam as claimed in claim 1, is characterized in that, the section line feature V-arrangement feature of corresponding torsion beam interlude is divided and completed the processing that is shaped for four times; Wherein, the first operation is pressed into triangle by pipe, then the shaping of the second～four operation employing substep, and forming V-shape cross section is progressively shaped triangular-section.
4. the hydraulic forming method of pipe fitting torsion beam as claimed in claim 1, is characterized in that, according to the section line feature U-shaped feature of torsion beam changeover portion, divides and completes processing three times; Wherein, the first operation is pressed into semicircle by circle, then is out of shape the U-shaped structure that forms indent successively.
5. the hydraulic forming method of pipe fitting torsion beam as claimed in claim 1, is characterized in that, according to the cross sectional shape rectangle feature of torsion beam end, divides and forms processing three times, progressively circle is pressed into rectangle; During shaping, in pipe, establish the cushion block that can prevent that lower plane from subsiding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410119429.2A CN103920787B (en) | 2014-03-27 | 2014-03-27 | A kind of hydraulic forming method of pipe fitting torsion beam |
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| CN201410119429.2A CN103920787B (en) | 2014-03-27 | 2014-03-27 | A kind of hydraulic forming method of pipe fitting torsion beam |
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| CN103920787B CN103920787B (en) | 2016-01-27 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105479116A (en) * | 2015-12-30 | 2016-04-13 | 浙江吉利汽车研究院有限公司 | Manufacturing method for high-strength torsion beam cross beam |
| CN106181265A (en) * | 2016-08-29 | 2016-12-07 | 天人汽车底盘（芜湖）股份有限公司 | Car closed torsion beam plate shaping technique |
| CN108312803A (en) * | 2017-01-16 | 2018-07-24 | 浙江摩多巴克斯科技股份有限公司 | A kind of high-strength sealed Formula V shape chassis torsion beam |
| CN108909398A (en) * | 2018-07-31 | 2018-11-30 | 重庆长安汽车股份有限公司 | A kind of torsion beam crossbeam, torsion beam assembly and automobile |
| CN109070175A (en) * | 2016-03-10 | 2018-12-21 | 新日铁住金株式会社 | The manufacturing method and automobile part of automobile part |
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| US20010022099A1 (en) * | 2000-03-09 | 2001-09-20 | Yukikazu Ueno | Manufacturing method for irregular-section tubular body and axle beam for torsion beam |
| CN1463209A (en) * | 2001-05-22 | 2003-12-24 | 三菱自动车工业株式会社 | Hydroforming method and product made by method |
| JP2004181477A (en) * | 2002-12-02 | 2004-07-02 | Nissan Motor Co Ltd | Hydraulic forming device |
| CN101772433A (en) * | 2007-07-25 | 2010-07-07 | Posco公司 | Tubular torsion beam for rear suspensions of vehicles and manufacturing method thereof |
| CN102267490A (en) * | 2011-05-04 | 2011-12-07 | 北京航空航天大学 | Internal-high-pressure-forming-based automobile longitudinal beam and manufacturing method thereof |
| CN102601204A (en) * | 2012-03-15 | 2012-07-25 | 吉林省元隆达工装设备有限公司 | Multi-deformed bending forming method and device for pipe fitting |
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2014
- 2014-03-27 CN CN201410119429.2A patent/CN103920787B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20010022099A1 (en) * | 2000-03-09 | 2001-09-20 | Yukikazu Ueno | Manufacturing method for irregular-section tubular body and axle beam for torsion beam |
| CN1463209A (en) * | 2001-05-22 | 2003-12-24 | 三菱自动车工业株式会社 | Hydroforming method and product made by method |
| JP2004181477A (en) * | 2002-12-02 | 2004-07-02 | Nissan Motor Co Ltd | Hydraulic forming device |
| CN101772433A (en) * | 2007-07-25 | 2010-07-07 | Posco公司 | Tubular torsion beam for rear suspensions of vehicles and manufacturing method thereof |
| CN102267490A (en) * | 2011-05-04 | 2011-12-07 | 北京航空航天大学 | Internal-high-pressure-forming-based automobile longitudinal beam and manufacturing method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105479116A (en) * | 2015-12-30 | 2016-04-13 | 浙江吉利汽车研究院有限公司 | Manufacturing method for high-strength torsion beam cross beam |
| CN105479116B (en) * | 2015-12-30 | 2018-01-30 | 浙江吉利汽车研究院有限公司 | A kind of preparation method of high intensity torsion beam crossbeam |
| CN109070175A (en) * | 2016-03-10 | 2018-12-21 | 新日铁住金株式会社 | The manufacturing method and automobile part of automobile part |
| CN106181265A (en) * | 2016-08-29 | 2016-12-07 | 天人汽车底盘（芜湖）股份有限公司 | Car closed torsion beam plate shaping technique |
| CN108312803A (en) * | 2017-01-16 | 2018-07-24 | 浙江摩多巴克斯科技股份有限公司 | A kind of high-strength sealed Formula V shape chassis torsion beam |
| CN108909398A (en) * | 2018-07-31 | 2018-11-30 | 重庆长安汽车股份有限公司 | A kind of torsion beam crossbeam, torsion beam assembly and automobile |
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| CN103920787B (en) | 2016-01-27 |
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