CN107803423A - A kind of shaped structure and manufacturing process for manufacturing lightweight automobile rim - Google Patents
A kind of shaped structure and manufacturing process for manufacturing lightweight automobile rim Download PDFInfo
- Publication number
- CN107803423A CN107803423A CN201711240548.3A CN201711240548A CN107803423A CN 107803423 A CN107803423 A CN 107803423A CN 201711240548 A CN201711240548 A CN 201711240548A CN 107803423 A CN107803423 A CN 107803423A
- Authority
- CN
- China
- Prior art keywords
- pressure forming
- shaped structure
- mould
- cylindrical blank
- lightweight automobile
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 32
- 238000007493 shaping process Methods 0.000 claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000000463 material Substances 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 5
- 230000010349 pulsation Effects 0.000 claims description 4
- 229910000851 Alloy steel Inorganic materials 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000006052 feed supplement Substances 0.000 claims description 2
- 208000002925 dental caries Diseases 0.000 claims 1
- 150000001875 compounds Chemical class 0.000 abstract description 11
- 238000009987 spinning Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 8
- 230000015572 biosynthetic process Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000020442 loss of weight Diseases 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000037303 wrinkles Effects 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
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/047—Mould construction
-
- 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
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
- B21D53/30—Making other particular articles wheels or the like wheel rims
Abstract
The invention discloses a kind of shaped structure and manufacturing process for manufacturing lightweight automobile rim, belong to heavy caliber tubing machine parts'precise forming technique field.According to the concavo-convex feature on Novel lightweight automobile rim design of part, design invents a kind of compound Hydroform process, pass through the common cooperation of blank and mould, independent airtight cavity inside and outside being formed respectively, kerve region among its China and foreign countries' high-pressure forming wheel rim, internal high pressure forming wheel rim edge lug area, the two is carried out simultaneously.This method not only greatly improves compared to conventional roll technique and spinning process efficiency, and it can effectively reduce the deflection of single pass during wheel rim part forming, and coordinate appropriate axial feed, can effectively prevent part wall thickness excessive thinning, ensure rim structure rigidity.Load needed for shaping is provided by the flexible media of pulsating liquid, the surface quality of wheel rim part is effectively ensured, reduces following process.
Description
Technical field
The present invention relates to pipe-shaped parts Precision Forming Technology field, specially a kind of shaping for manufacturing lightweight automobile rim
Structure and manufacturing process.
Background technology
Automobile steel wheel is made up of wheel rim and spoke two parts, and wheel rim is the part of steel wheel surrounding edge.Wheel
Rim is commonly called as wheel rim, is contacted respectively with spoke and matching of tyre, is main load critical component.The common form master of automobile rim
There are two kinds：Drop center rim and straight base rim；In addition with divided type rim, semi drop center rim(sdc), wide drop center rim, flat wide wheel
Rim and full tapered bead seat rim.The surface texture of wheel rim is general all more complicated, and deflection is big in forming process, easily occurs broken
Split, wrinkle, the problems such as low stock utilization and complex process be present.
At present generally using sheet material is coiling welded, multi-pass rolls and expansion finishing shaping, manufacturing process is complicated, efficiency is low,
Cost is high, simultaneously because technique limitation wheel rim can only generally select medium intensity level low-alloy steel, and can not shape more
The wheel rim part of labyrinth profile, therefore further light-weighted demand can not be met.
Forming mode is mainly rolling forming process at present.The A of Chinese invention patent CN 103286524 disclose a kind of plate
Material shapes wheel rim processing technology, compared to more traditional shaped steel forming technology which alleviates of wheel rim weight itself, reduces cost,
Improve the reliability of product.But this technique remains that rolling technology long flow path, blank wall thickness be relatively large, rigidity mistake
It is required that the deficiencies of part.And different degrees of cut is easily caused to piece surface during rolling.Vertical section structure
For asymmetric wheel rim part in forming process, stress is more complicated, and axial force imbalance be present, it is necessary to especially increase it
His constitutional balance axial force difference, required shaping dies is more, and production cost is high.
The A of Chinese invention patent CN 103464563 disclose a kind of external high-pressure liquid-filling forming device for pipe.Although this device
Using hydroforming, forming effect is good, but can only shape some simple parts, and its deformation is difficult to control for complex parts
Amount.
Above two forming technology, although forming mode is different, for larger complicated tubular by zero of radial-deformation
Technological process length be present, the shortcomings of deflection is small, formation of parts surface quality is poor, low production efficiency can be achieved in the shaping of part.
The content of the invention
In order to solve prior art above-mentioned weak point present in wheel rim processing technology, it is an object of the invention to carry
For a kind of shaped structure and manufacturing process for manufacturing lightweight automobile rim, by using inside and outside compound Hydroform process, lead to
The common cooperation of blank and mould is crossed, respectively airtight cavity independent inside and outside formation, kerve among its China and foreign countries' high-pressure forming wheel rim
Region, internal high pressure forming wheel rim edge lug area, the two is carried out simultaneously, is coordinated and is selected moderate pipe external diameter, final to realize
The hydroforming of the larger labyrinth thin-wall tubular part of radial deformation.This method is not only compared to conventional roll technique and rotation
Pressure process efficiency greatly improves, and can effectively reduce the deflection of single pass during wheel rim part forming, and matches somebody with somebody
The axial feed properly worked as, part wall thickness excessive thinning can be effectively prevented, ensure rim structure rigidity.By pulsating liquid
Load needed for flexible media offer shaping, is effectively ensured the surface quality of wheel rim part, reduces following process.
To achieve the above object, the technical solution adopted in the present invention is as follows：
A kind of shaped structure for manufacturing lightweight automobile rim, the shaped structure include internal high pressure forming mould, outer high pressure
Shaping dies, cylindrical blank and annular punch；Wherein：The internal high pressure forming mould is set in outside outer high-pressure forming mold,
The closed die cavity of automobile rim is formed after matched moulds；Tubular base is placed between the internal high pressure forming mould and outer high-pressure forming mold
Material, the annular punch are located at two sides of cylindrical blank, and cylindrical blank can be made to carry out axial feed motion.
Closed die cavity is divided into inside and outside two parts by the cylindrical blank, and blank inner surface side is outer high-pressure sealed cavity,
Blank outer surface side is inner high voltage airtight cavity.
The internal high pressure forming mould and outer high-pressure forming mold are all Split type structure, and internal high pressure forming mould is symmetrical
Two-piece unit structure, outer high-pressure forming mold are symmetrical split left and right structure.
The internal high pressure forming mould is provided with topping up passage I, along being radially arranged for internal high pressure forming mould, outlet end pair
Should be in inner high voltage airtight cavity；The outer high-pressure forming mold is provided with topping up passage II, and outlet end corresponds to two outer high pressures
Airtight cavity.
The shaped structure also includes sealing ring, and the sealing ring is circumferentially distributed, and is arranged at inner high voltage airtight cavity and outer
Opening position between high-pressure sealed cavity.
The wall thickness of the cylindrical blank is 2mm, and initial pipe external diameter is 360mm, radius-thickness ratio 180, using the micro- conjunction of low-carbon
Golden steel S500MC, its tensile strength are about 650MPa.
Using the manufacturing process of shaped structure manufacture lightweight automobile rim, specifically comprise the following steps：
(1) cylindrical blank is set on outer high-pressure forming mold, closes internal high pressure forming mould and annular punch, led to
The common cooperation of cylindrical blank and mould is crossed, forms separate outer high-pressure sealed chamber respectively inside and outside cylindrical blank
Body and inner high voltage airtight cavity；
(2) by the topping up passage I on the topping up passage II and internal high pressure forming mould on outer high-pressure forming mold to cylinder
Shape blank surfaces externally and internally applies the highly pressurised liquid of pulsation simultaneously and is formed, at the same time, annular punch drive cylindrical blank to
Interior propulsion feed supplement, until cylindrical blank is bonded completely with the contact surface of internal high pressure forming mould and outer high-pressure forming mold；
(3) discharge highly pressurised liquid, exit annular punch, it is vertical open internal high pressure forming mould and the horizontal outer high pressure of removal into
Shape mould, take out the wheel rim part after shaping.
In above-mentioned steps (2), when being formed to the highly pressurised liquid of cylindrical blank surface application pulsation, surfaces externally and internally is applied
The load waveform of the highly pressurised liquid added is consistent.Hydroforming medium is water or hydraulic oil.
Beneficial effects of the present invention are as follows：
1st, compared to traditional rolling forming process, the present invention use inside and outside compound Hydroform process, will be original more
Passage rolls the compound hydroforming for shortening to a time, greatly shortens technological process, and forming efficiency is high, and the part after shaping
Shaping, forming accuracy height are not needed.
2nd, being capable of external pressure shaping process in reasonable distribution using inside and outside compound Hydroform process.Compared to single interior height
Pressing formation or outer high-pressure forming can effectively reduce the deflection of blank, effectively prevent part wall thickness excessive thinning, increase
The strength and stiffness of part after shaping.
3rd, using inside and outside compound Hydroform process, forming technology is more stable, is ensureing effective axial feed and selection
On the premise of higher intensity grade material, it can suitably reduce the wall thickness of initial blank, be compared to conventional roll technique, can
The loss of weight of wheel rim part is effectively realized, reduces waste of material, and the part after hydroforming and mould compactness are high, it is not necessary to
Increase trimming.
Brief description of the drawings
Fig. 1 is the schematic diagram of the shaped structure of present invention manufacture lightweight automobile rim.
Fig. 2 is the method schematic that the present invention manufactures lightweight automobile rim based on internal and external pressurization compound forming technique.
Fig. 3 is inside and outside compound hydroforming Die ＆ Mould Forming Process and die sinking schematic diagram.
In figure：1- internal high pressure forming moulds, 2- cylindrical blanks, 3- annular punch, the outer high-pressure forming molds of 4-, 5- topping ups lead to
Road I, 6- sealing rings, 7- topping ups passage II, 8- wheel rim parts.
Embodiment
The present invention is elaborated below in conjunction with drawings and examples.But the present invention is not limited to a kind of following wheel rims
The compound hydroforming of part, it is equally applicable for the wheel rim of other same kind different models and size.
The present invention is that shaped structure and the shaping side of lightweight automobile rim are manufactured based on inside and outside compound Hydroform process
Method, suitable for form high strength and the automobile rim of big radius-thickness ratio.As shown in figure 1, the shaped structure includes internal high pressure forming
Mould 1, outer high-pressure forming mold 4, cylindrical blank 2 and annular punch 3；Wherein：The tool of internal high pressure forming die 1 is set in outer height
Outside pressing formation mould 4, the closed die cavity of formation automobile rim after film is closed；The internal high pressure forming mould and outer high-pressure forming mould
Cylindrical blank 2 is placed between tool, the annular punch 3 is located at two sides of cylindrical blank, and cylindrical blank can be made to carry out axially
Feed motion.
Closed die cavity is divided into inside and outside two parts by the cylindrical blank, and blank inner surface side is outer high-pressure sealed cavity,
Blank outer surface side is inner high voltage airtight cavity.
The internal high pressure forming mould and outer high-pressure forming mold are all Split type structure, and internal high pressure forming mould is symmetrical
Two-piece unit structure, outer high-pressure forming mold are symmetrical split left and right structure.
The internal high pressure forming mould is provided with topping up passage I 5, along being radially arranged for internal high pressure forming mould, outlet end
Corresponding to inner high voltage airtight cavity；The outer high-pressure forming mold is provided with topping up passage II 7, and outlet end corresponds to two outer high
Press airtight cavity.
The shaped structure also includes sealing ring 6, the position being arranged between inner high voltage airtight cavity and outer high-pressure sealed cavity
Put place.
In the present invention, outer high-pressure sealed die cavity be by outer high-pressure forming mold, cylindrical blank, annular punch and inner high voltage into
Shape mould closes formed confined space.The closed die cavity of inner high voltage is by cylindrical blank inner surface and outer high-pressure forming mold phase
The confined space for answering the outer surface at position to be formed.
In the present invention, hydroforming medium is water or hydraulic oil.
In the present invention, inside and outside high-pressure forming mold is separately designed as two parts symmetrical above and below and symmetrical two
Point, realize the shaping rear rim 8 smooth demoulding radially and axially of part.
In the present invention, four topping up passages are provided with inside and outside high-pressure forming mold, be easy to it is quick, efficient, equably will
Shaping medium is transported to shaping position.
Embodiment 1：
Following (such as Fig. 2-3 of method of the present embodiment based on inside and outside compound Hydroform process manufacture lightweight automobile rim
It is shown)：
The first step, selection length is 184mm, the low-carbon micro steel-alloy S500MC that caliber 360mm, wall thickness are 2mm, and it is anti-
Tensile strength is about 650MPa, as the initial cylindrical blank 2 of internal high pressure forming, as shown in Fig. 2 vertically open inner high voltage into
Shape mould 1, cylindrical blank 2 is arranged on outside hydroforming on high-pressure forming mold 4.
Second step, the outer high-pressure forming mold 4 of two halves is closed vertically, vertically close high in two halves symmetrical above and below
Pressing formation mould 1, annular punch 3 is fed vertically cylindrical blank 2 is fixed on correct position, by internal high pressure forming mould
1 and outer high-pressure forming mold 4 and annular punch 3 be locked in specified location, and by the inner surface of internal high pressure forming mould 1, ring
Shape drift 3, cylindrical blank 2 and the outer surface of outer high-pressure forming mold 4 form high in one respectively in the surfaces externally and internally of cylindrical blank
The airtight cavity of pressure and outer high pressure, start liquid charging device, is filled by internal high pressure forming topping up passage I 5 and outer high-pressure forming
Liquid passage II 7 is toward being filled with enough liquid in airtight cavity.
3rd step, highly pressurised liquid is inputted into airtight cavity according to inside and outside high-pressure forming pressure oscillation loading curve and makes ring
Shape drift 3 does corresponding axial feed motion so that cylindrical blank 2 and mold cavity are gradually bonded.
4th step, highly pressurised liquid is discharged, exit annular punch 3, open internal high pressure forming mould 1 and inside and outside high-pressure forming mould
Tool 4, the wheel rim part 8 after shaping is taken out, completes whole forming process.
Claims (9)
- A kind of 1. shaped structure for manufacturing lightweight automobile rim, it is characterised in that：The shaped structure includes internal high pressure forming die Tool, outer high-pressure forming mold, cylindrical blank and annular punch；Wherein：The internal high pressure forming mould is set in outer high-pressure forming Outside mould, the closed die cavity of automobile rim is formed after matched moulds；Between the internal high pressure forming mould and outer high-pressure forming mold Cylindrical blank is placed, the annular punch is located at two sides of cylindrical blank, and cylindrical blank can be made to carry out axial feed motion.
- 2. the shaped structure of manufacture lightweight automobile rim according to claim 1, it is characterised in that：The cylindrical blank Closed die cavity is divided into inside and outside two parts, blank inner surface side is outer high-pressure sealed cavity, and blank outer surface side is interior height Press airtight cavity.
- 3. the shaped structure of manufacture lightweight automobile rim according to claim 1, it is characterised in that：The inner high voltage into Shape mould and outer high-pressure forming mold are all Split type structure, and internal high pressure forming mould is symmetrical two-piece unit structure, outer high pressure Shaping dies is symmetrical split left and right structure.
- 4. the shaped structure of manufacture lightweight automobile rim according to claim 2, it is characterised in that：The inner high voltage into Shape mould is provided with topping up passage I, and along being radially arranged for internal high pressure forming mould, outlet end corresponds to inner high voltage airtight cavity； The outer high-pressure forming mold is provided with topping up passage II, and outlet end corresponds to two outer high-pressure sealed cavitys.
- 5. the shaped structure of manufacture lightweight automobile rim according to claim 2, it is characterised in that：The shaped structure is also Including sealing ring, the opening position being arranged between inner high voltage airtight cavity and outer high-pressure sealed cavity.
- 6. the shaped structure of manufacture lightweight automobile rim according to claim 2, it is characterised in that：The cylindrical blank Wall thickness be 2mm, the initial a diameter of 360mm of pipe, radius-thickness ratio 180, using low-carbon micro steel-alloy, its tensile strength is about 650MPa。
- 7. utilize the manufacturing process of any shaped structure manufacture lightweight automobile rims of claim 1-6, it is characterised in that： This method is using shaped structure manufacture lightweight automobile rim, is specifically comprised the following steps：(1) cylindrical blank is set on outer high-pressure forming mold, closes internal high pressure forming mould and annular punch, pass through cylinder The common cooperation of shape blank and mould, formed respectively inside and outside cylindrical blank separate outer high-pressure sealed cavity and Inner high voltage airtight cavity；(2) by the topping up passage I on the topping up passage II and internal high pressure forming mould on outer high-pressure forming mold to tubular base The highly pressurised liquid that material surfaces externally and internally applies pulsation simultaneously is formed, and at the same time, annular punch drives cylindrical blank inwardly to push away Enter feed supplement, until cylindrical blank is bonded completely with the contact surface of internal high pressure forming mould and outer high-pressure forming mold；(3) highly pressurised liquid is discharged, exits annular punch, vertical internal high pressure forming mould of opening removes outer high-pressure forming mould with horizontal Tool, take out the wheel rim part after shaping.
- 8. utilize the manufacturing process of the manufacture lightweight automobile rim described in claim 7, it is characterised in that：In step (2), to When the highly pressurised liquid that cylindrical blank surface applies pulsation is formed, the load waveform one of the highly pressurised liquid applied to surfaces externally and internally Cause.
- 9. utilize the manufacturing process of the manufacture lightweight automobile rim described in claim 7, it is characterised in that：Hydroforming medium For water or hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711240548.3A CN107803423A (en) | 2017-11-30 | 2017-11-30 | A kind of shaped structure and manufacturing process for manufacturing lightweight automobile rim |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711240548.3A CN107803423A (en) | 2017-11-30 | 2017-11-30 | A kind of shaped structure and manufacturing process for manufacturing lightweight automobile rim |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107803423A true CN107803423A (en) | 2018-03-16 |
Family
ID=61590361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711240548.3A Pending CN107803423A (en) | 2017-11-30 | 2017-11-30 | A kind of shaped structure and manufacturing process for manufacturing lightweight automobile rim |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107803423A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109351838A (en) * | 2018-12-21 | 2019-02-19 | 房县诚信汽配有限责任公司 | A kind of automobile pipe part internal high pressure forming technique |
| CN109482718A (en) * | 2018-09-21 | 2019-03-19 | 北京长城华冠汽车科技股份有限公司 | Boring method |
| CN112893602A (en) * | 2021-02-01 | 2021-06-04 | 南昌航空大学 | Stamping forming die for single-waveform ring parts |
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| JP2005014758A (en) * | 2003-06-26 | 2005-01-20 | Rk Excel:Kk | Rim, and method for manufacturing the same |
| CN101011715A (en) * | 2006-12-15 | 2007-08-08 | 哈尔滨工业大学 | Device for reducing friction of guided region when forming high pressure in pipe |
| CN101332480A (en) * | 2008-06-07 | 2008-12-31 | 桂林电子科技大学 | Simple inside high-pressure forming method |
| KR20110010858A (en) * | 2009-07-27 | 2011-02-08 | 주식회사 포스코 | Method for manufacturing of automobile wheel using hydroforming |
| CN102228926A (en) * | 2011-05-05 | 2011-11-02 | 北京航空航天大学 | Liquid-charging and forming method of two-way pressurizing pipe |
| CN103909133A (en) * | 2014-04-03 | 2014-07-09 | 南京航空航天大学 | Composite punch device for forming of iso-wall-thickness multi-way tubes and forming method |
| CN103920788A (en) * | 2014-04-03 | 2014-07-16 | 南京航空航天大学 | Differential pressure forming method for local large-deformation hollow pieces |
| CN203900324U (en) * | 2014-05-27 | 2014-10-29 | 浙江风驰机械有限公司 | Internal-support type rim ring rolling machine |
| CN106583483A (en) * | 2017-01-26 | 2017-04-26 | 郝鑫颖 | Hub manufacturing equipment and hub manufacturing method |
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2017
- 2017-11-30 CN CN201711240548.3A patent/CN107803423A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB633183A (en) * | 1947-09-11 | 1949-12-12 | Watkin Eric Benson | Improvements in and relating to shaping and/or contracting cylindrical articles |
| CA2144215A1 (en) * | 1994-03-16 | 1995-09-17 | Shujiro Inatani | Rotary forging apparatus |
| DE19830623A1 (en) * | 1998-07-09 | 2000-01-13 | Forschungsges Umformtechnik | Hollow workpiece conversion by high pressure medium is aided by outward pressure at reduction point by impressed plunger tool to reduce work to tool friction |
| JP2005014758A (en) * | 2003-06-26 | 2005-01-20 | Rk Excel:Kk | Rim, and method for manufacturing the same |
| CN101011715A (en) * | 2006-12-15 | 2007-08-08 | 哈尔滨工业大学 | Device for reducing friction of guided region when forming high pressure in pipe |
| CN101332480A (en) * | 2008-06-07 | 2008-12-31 | 桂林电子科技大学 | Simple inside high-pressure forming method |
| KR20110010858A (en) * | 2009-07-27 | 2011-02-08 | 주식회사 포스코 | Method for manufacturing of automobile wheel using hydroforming |
| CN102228926A (en) * | 2011-05-05 | 2011-11-02 | 北京航空航天大学 | Liquid-charging and forming method of two-way pressurizing pipe |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109482718A (en) * | 2018-09-21 | 2019-03-19 | 北京长城华冠汽车科技股份有限公司 | Boring method |
| CN109482718B (en) * | 2018-09-21 | 2021-01-26 | 北京长城华冠汽车科技股份有限公司 | Hole opening method |
| CN109351838A (en) * | 2018-12-21 | 2019-02-19 | 房县诚信汽配有限责任公司 | A kind of automobile pipe part internal high pressure forming technique |
| CN112893602A (en) * | 2021-02-01 | 2021-06-04 | 南昌航空大学 | Stamping forming die for single-waveform ring parts |
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