CN105921585A - Punching method for internal high pressure forming pipe fitting - Google Patents
Punching method for internal high pressure forming pipe fitting Download PDFInfo
- Publication number
- CN105921585A CN105921585A CN201610291126.8A CN201610291126A CN105921585A CN 105921585 A CN105921585 A CN 105921585A CN 201610291126 A CN201610291126 A CN 201610291126A CN 105921585 A CN105921585 A CN 105921585A
- Authority
- CN
- China
- Prior art keywords
- punching
- pipe fitting
- hole
- high voltage
- cylinder
- 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
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
- B21D26/035—Deforming tubular bodies including an additional treatment performed by fluid pressure, e.g. perforating
Abstract
The invention discloses a punching method for an internal high pressure forming pipe fitting. After internal high pressure forming, further setting of a punching tool is not required, a forming die is used for supporting, liquid pressure is utilized for applying a force on a punching portion, and therefore the punch portion is evenly stressed, and the punching precision is improved; the punching direction is from inside to outside, so that the product internal dent problem due to internal punching is completely solved; and at the same time, burrs generated during punching are located on the outer side of a workpiece and can be eliminated by subsequent simple polishing, and the overall finish degree of the product is good. The invention further discloses a device used for achieving the punching method for the internal high pressure forming pipe fitting, the punching method can be achieved through the optimal setting of the device, and therefore the applicability of the punching method is high assuringly, and the machining cost is lower.
Description
Technical field
The present invention relates to pipe fitting processing technique field, particularly relate to a kind of inner high voltage moulding pipe hole-punching method.
Background technology
At the pipe fitting manufacture field at the position such as automobile chassis, dashboard cradle, inner high voltage molding is generally used to enter
Row processing.So that the pipe ring of inner high voltage molding can assemble with other parts, generally will be on pipe ring
Get several to ten several holes.Conventional processing methods is to first pass through inner high voltage to be shaped workpiece, then
By mould inner punch drilling method, the workpiece after molding is punched.
As it is shown in figure 1, inner high voltage molding is the pipe ring of certain length to be put into mould, at internal liquid (water
Or oil) pressure effect under, flow by controlling fluid pressure and material, make pipe ring to radially expanding
, produce plastotype deformation and carry out the manufacturing technology of formed hollow structural member.Mould inner punch drilling method, this dozen
The technical process of hole method is: after pipe ring molding, keeps relatively high internal pressure in pipe, using highly pressurised liquid as support,
Drift ecto-entad high speed motion, directly goes out hole material from stock.So can reduce manufacturing procedure,
Reduce production cost and improve positioning precision.But, there is following defect in this drilling method:
1. owing to only inevitably producing as support, stock punching marginal position by highly pressurised liquid during punching
Life is a certain degree of caves in, and punching produces burr at internal surface of pipe and is difficult to clean off.
2. punching aperture is the biggest, and required punching power is the biggest, it is necessary to punching oil cylinder tonnage is relatively big, and expense becomes
This height.And it is limited to limited space on hydraulic forming machine, and punching cylinder sizes is bigger than normal, the hole in lower mold
Typically it is difficult to be up to, needs to increase extra drilling process.
3. being limited by hole material diameter, the diameter maximum of plunger rod not can exceed that diameter is expected in hole, causes jumper bar stress
Can reach 620MPa, close to the yield strength of material, drift is low for fatigue life, needs mould when changing drift
Tool is taken off, and expends man-hour.
4., during punching metapore material can fall into internal high pressure forming pipe fitting, add follow-up cleaning work, reduce
Production efficiency.
Summary of the invention
For solving technical problem present in background technology, the present invention proposes a kind of inner high voltage moulding pipe punching
Method.
A kind of inner high voltage moulding pipe hole-punching method that the present invention proposes, comprises the following steps:
S1, will treat that die cavity put into by punching pipe fitting, and make described pipe fitting position to be punctured be positioned at punching station, to
Injecting liquid in described pipe fitting, wherein said die cavity sidewall is provided with punching hole, is provided with spacing in described punching hole
Block piece；
S2, the fluid pressure increased in described pipe fitting are to the first pressure threshold P1 so that described pipe fitting sidewall supports
By described spacing block piece, wherein, P1≤PC, PCFor pipe fitting sidewall deformation pressure threshold value；
S3, the fluid pressure continued in the described pipe fitting of increase, to the second pressure threshold P2, drive described limiting block
Part retreats to away from described pipe fitting direction, until punching completes, wherein, and P2 >=PC。
Preferably, in S1, in described pipe fitting, inject water.
Preferably, in S3, drive described spacing block piece to away from described pipe fitting direction retreat first preset away from
From L1, L1 ＞ t, wherein t is described tube wall thickness.
Preferably, L1:t=1.1～1.3；Preferably, L1:t=1.2.
Preferably, also include: S4, liquid in described pipe fitting is discharged, drive described spacing block piece to close
Described pipe fitting direction is moved, and hole material punching produced is released.
Preferably, in S4, drive described spacing block piece near described pipe fitting direction move second preset away from
From L2, L2-L1 ＞ t.
In the present invention, the inner high voltage moulding pipe hole-punching method proposed, after inner high voltage molding, it is not necessary to enter
One step arranges punching tool, by mould solid support, utilizes fluid pressure to exert a force punching position, makes
Obtain punching position uniform force, improve punching precision；Punching direction from inside to outside, thus rushes in thoroughly solving
The product that hole is caused caves in problem, and the burr that punching simultaneously produces, can be by follow-up letter outside workpiece
Singles grind off and remove, and product entirety fineness is good.
The invention allows for a kind of device realizing above-mentioned inner high voltage moulding pipe hole-punching method, including:
Including: die assembly, feed liquor cylinder, pressurized cylinder, driving cylinder；
Having the die cavity accommodating pipe fitting to be processed in die assembly, described die cavity two ends are respectively provided with the first opening
With the second opening, described die cavity sidewall is provided with receiving groove, is provided with punching insert in described receiving groove,
Being provided with the punching hole arranged along described receiving groove bearing of trend in punching insert, punching insert is near described mould
One end, chamber is provided with material cut part, hole；
Feed liquor cylinder is positioned at described die cavity one end, and feed liquor cylinder is provided with for sealing with tubular first end to be processed
First sealing, the liquid outlet of feed liquor cylinder is positioned on described first sealing；
Pressurized cylinder is positioned at described die cavity away from feed liquor cylinder one end, pressurized cylinder be provided with for pipe fitting to be processed
The second sealing that two ends seal, the supercharging outfan of pressurized cylinder is positioned on described second sealing；
Driving cylinder is provided with spacing block piece, and spacing block piece is positioned at described punching hole and seals with described punching hole
Coordinate.
Preferably, punching insert is removably mounted on die assembly.
Preferably, die assembly includes that the first module and the second module, the first module and the second module coordinate shape
Becoming die cavity, described receiving groove is arranged on the first module and/or the second module.
Preferably, driving cylinder uses punching press oil cylinder, and spacing block piece uses punching press drift.
In the present invention, by the device of optimal design-aside, method set forth above can be realized, thus on ensureing
Stating method applicability strong, processing cost is relatively low.
Accompanying drawing explanation
Fig. 1 is the structural representation under a kind of inner high voltage moulding pipe hole punched device original state that the present invention proposes
Figure.
Fig. 2 is the structural representation after a kind of inner high voltage moulding pipe hole punched device punching that the present invention proposes terminates
Figure.
Detailed description of the invention
As illustrated in fig. 1 and 2, Fig. 1 is that a kind of inner high voltage moulding pipe hole punched device that the present invention proposes is initial
Structural representation under state, Fig. 2 is a kind of inner high voltage moulding pipe hole punched device punching that the present invention proposes
Structural representation after end.
The present invention proposes a kind of inner high voltage moulding pipe hole-punching method, and it comprises the following steps:
S1, will treat that die cavity put into by punching pipe fitting, and make described pipe fitting position to be punctured be positioned at punching station, to
Injecting liquid in described pipe fitting, wherein said die cavity sidewall is provided with punching hole, is provided with spacing in described punching hole
Block piece；
S2, the fluid pressure increased in described pipe fitting are to the first pressure threshold P1 so that described pipe fitting sidewall supports
By described spacing block piece, wherein, P1≤PC, PCFor pipe fitting sidewall deformation pressure threshold value；
S3, the fluid pressure continued in the described pipe fitting of increase, to the second pressure threshold P2, drive described limiting block
Part retreats to away from described pipe fitting direction, until punching completes, wherein, and P2 >=PC；
S4, liquid in described pipe fitting is discharged, drives described spacing block piece to move near described pipe fitting direction,
Hole material punching produced is released.
During carrying out supercharging in pipe fitting, first in pipe fitting, fluid pressure increases to the first pressure threshold
During value, pipe fitting deforms upon so that it is sidewall is fitted with described mould intracavity wall, it is ensured that mould intracavity wall is
Pipe fitting sidewall provides and supports, along with when in pipe fitting, fluid pressure continues to increase to the second pressure threshold, and liquid pressure
Power exceedes tube wall deformation pressure threshold value, now drives and is positioned at the spacing block piece rapid backward at described punching hole,
Making pipe fitting under mould intracavity wall supporting role and fluid pressure effect, the position to be punctured of pipe fitting is sheared,
Realize punching.
In the present embodiment, the inner high voltage moulding pipe hole-punching method proposed, after inner high voltage molding, it is not necessary to
Punching tool is set further, by mould solid support, utilizes fluid pressure that punching position is exerted a force,
Make punching position uniform force, improve punching precision；Punching direction from inside to outside, thus thoroughly solves interior
The product that punching causes caves in problem, and the burr that punching simultaneously produces, can be by follow-up outside workpiece
Simply polishing removal, product entirety fineness is good.
In pressurization, pipe fitting sidewall deformation pressure threshold value PCTo the first pressure threshold and the second pressure threshold
Design the most important, pipe fitting sidewall deformation pressure threshold value PCDetermined by following equation: PC=4 η δbT/d,
Wherein, δbFor the tensile strength of described tube material, t is described tube wall thickness, and d is punching diameter, and η is
The shearing factor of described tube material；By to pipe fitting sidewall deformation pressure threshold value PCQuantitative Analysis, it is simple to
Preset the first pressure threshold in punch process and the second pressure threshold.
In S2, water can be filled with in described pipe fitting as pressurized liquid, owing to water coefficient of compressibility is very big,
When water is carried out supercharging, when 1 atmospheric pressure state is compressed to 100MPa, volume reduces less than 5%, because of
Pressurized cylinder delivery stroke is required relatively low by this, reduces equipment cost；Meanwhile, adopt use water as punching pressure be situated between
Matter, the safety of water is good, and can carry out effective temperature-reducing for pipe fitting sidewall in punch process.
In S3, described spacing block piece is driven to retreat the first predeterminable range L1, L1 to away from described pipe fitting direction
＞ t, wherein t is described tube wall thickness, it is preferable that L1:t=1.1～1.3, it is highly preferred that L1:t=1.2；
When ensureing punching, hole material is thoroughly sheared from tube wall, it is ensured that the accuracy of processing, and not to inside pipe fitting
Fluid pressure affect greatly, it is ensured that processing stability.
In S4, described spacing block piece is driven to move the second predeterminable range L2 near described pipe fitting direction,
L2-L1 ＞ t；Ensure that the hole material after shearing thoroughly ejects.
Reference Fig. 1 and 2, a kind of device realizing above-mentioned inner high voltage moulding pipe hole-punching method that the present invention proposes,
Including: die assembly, feed liquor cylinder 3, pressurized cylinder 4, driving cylinder；
Die assembly includes that the first module 11 and the second module 12, the first module 11 and the second module 12 coordinate
Forming the die cavity accommodating pipe fitting 6 to be processed, described die cavity two ends are respectively provided with the first opening and the second opening,
Die assembly is provided with the receiving groove connected with described die cavity, is provided with punching insert 2 in described receiving groove,
Punching insert 2 is removably mounted on die assembly, is provided with and extends along described receiving groove in punching insert 2
The punching hole that direction is arranged, punching insert 2 is provided with material cut part, hole near described die cavity one end；Described receiving
Groove can be arranged as required on the first module 11 and/or the second module 12；
Feed liquor cylinder 3 is positioned at described die cavity one end, feed liquor cylinder 3 be provided with for pipe fitting 6 first end to be processed
The first sealing sealed, the liquid outlet of feed liquor cylinder 3 is positioned on described first sealing；
Pressurized cylinder 4 is positioned at described die cavity away from feed liquor cylinder 3 one end, and pressurized cylinder 4 is provided with for to be processed
The second sealing that pipe fitting 6 second end seals, the supercharging outfan of pressurized cylinder 4 is positioned at described second sealing
On；
Driving cylinder is provided with spacing block piece 5, and spacing block piece 5 is positioned at described punching hole and close with described punching hole
Envelope coordinates.
During the specific works of the inner high voltage moulding pipe hole-punching method of the present embodiment, it is first turned on the first mould
Part and the second module, will treat that die cavity put into by punching pipe fitting 6, make described pipe fitting 6 position to be punctured be positioned at and beat
Hole station, by the first module and the second mold part, is then individually positioned in described by feed liquor cylinder and pressurized cylinder
Pipe fitting two ends, and feed liquor cylinder and pressurized cylinder are respectively by the first sealing and the second sealing and pipe fitting two ends
Sealing, then feed liquor cylinder injects liquid in described pipe fitting 6, and spacing block piece 5 is positioned at the initial of punching hole
Position, the work surface of spacing block piece 5 seamlessly transits with described mould intracavity wall, then increases institute by pressurized cylinder
State fluid pressure in pipe fitting 6 to the first pressure threshold P1 so that described pipe fitting 6 sidewall deforms upon and institute
State mould intracavity wall laminating and the position to be punctured work surface against described spacing block piece 5, then proceed to increase
Fluid pressure in described pipe fitting 6 is to the second pressure threshold P2, and driving cylinder drives spacing block piece 5 to away from institute
Stating pipe fitting 6 direction and retreat the first predeterminable range L1, until punching completes, last driving cylinder drives spacing block piece
The second predeterminable range L2 is moved so that ensure that the hole material after shearing thoroughly ejects near described pipe fitting direction.
In a specific embodiment, the device that can directly use existing inner punch drilling method to be used is implemented
Method of the invention it is achieved molding is continuously finished with punching, thus additionally without configuring process equipment,
Improve punching precision, it is simple to follow-up polishing is processed.
Additionally, in prior art, the punching press drift of driving cylinder needs to bear the shearing force of material and water and expects in hole
On pressure, therefore required punching power F1=1/4P π d2+ηδbπ dt, and in the present embodiment, the limit of driving cylinder
Hole material is ejected by the supported hole material when water rises that act as of position block piece with after punching terminates, its required driving
Power is F2=1/4P π d2-ηδbπ dt, F2It is about F120%.Therefore, the tonnage of required driving cylinder is less, expense
Low cost, thus improve its space availability ratio, design more flexible.Further, stress suffered by spacing block piece is big
Big reduction, is therefore greatly prolonged, can produce continuously its service life.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention not office
Being limited to this, any those familiar with the art is in the technical scope that the invention discloses, according to this
The technical scheme of invention and inventive concept thereof in addition equivalent or change, all should contain the protection in the present invention
Within the scope of.
Claims (10)
1. an inner high voltage moulding pipe hole-punching method, it is characterised in that comprise the following steps:
S1, will treat that die cavity put into by punching pipe fitting (6), and make described pipe fitting (6) position to be punctured be positioned at and beat
Hole station, injects liquid in described pipe fitting (6), and wherein said die cavity sidewall is provided with punching hole, described punching
Pressure is provided with spacing block piece (5) in hole；
S2, the fluid pressure increased in described pipe fitting (6) to the first pressure threshold P1 so that described pipe fitting
(6) sidewall is against described spacing block piece (5), wherein, P1≤PC, PCFor pipe fitting sidewall deformation pressure threshold value；
S3, the fluid pressure continuing to increase in described pipe fitting (6), to the second pressure threshold P2, drive described
Spacing block piece (5) retreats to away from described pipe fitting (6) direction, until punching completes, wherein, and P2 >=PC。
Inner high voltage moulding pipe hole-punching method the most according to claim 1, it is characterised in that at S1
In, in described pipe fitting (6), inject water.
Inner high voltage moulding pipe hole-punching method the most according to claim 1, it is characterised in that at S3
In, drive described spacing block piece (5) to retreat the first predeterminable range L1 to away from described pipe fitting (6) direction,
L1 ＞ t, wherein t is described pipe fitting (6) wall thickness.
Inner high voltage moulding pipe hole-punching method the most according to claim 3, it is characterised in that L1:
T=1.1～1.3；Preferably, L1:t=1.2.
Inner high voltage moulding pipe hole-punching method the most according to claim 3, it is characterised in that also include:
S4, described pipe fitting (6) interior liquid is discharged, drive described spacing block piece (5) near described pipe fitting (6)
Direction is moved, and hole material punching produced is released.
Inner high voltage moulding pipe hole-punching method the most according to claim 5, it is characterised in that at S4
In, drive described spacing block piece (5) to move the second predeterminable range L2 near described pipe fitting (6) direction,
L2-L1 ＞ t.
7. for realizing a device for the inner high voltage moulding pipe hole-punching method described in claim 1-6, its
It is characterised by, including: die assembly, feed liquor cylinder (3), pressurized cylinder (4), driving cylinder；
Having the die cavity accommodating pipe fitting to be processed (6) in die assembly, described die cavity two ends are respectively provided with first
Opening and the second opening, described die cavity sidewall is provided with receiving groove, is provided with punching edge in described receiving groove
Block (2), is provided with the punching hole arranged along described receiving groove bearing of trend in punching insert (2), punching is inlayed
Block (2) is provided with material cut part, hole near described die cavity one end；
Feed liquor cylinder (3) is positioned at described die cavity one end, feed liquor cylinder (3) be provided with for pipe fitting to be processed (6)
The first sealing that first end seals, the liquid outlet of feed liquor cylinder (3) is positioned on described first sealing；
Pressurized cylinder (4) is positioned at described die cavity away from feed liquor cylinder (3) one end, pressurized cylinder (4) be provided with for
The second sealing sealed with pipe fitting (6) second end to be processed, the supercharging outfan of pressurized cylinder (4) is positioned at
On described second sealing；
Driving cylinder is provided with spacing block piece (5), spacing block piece (5) be positioned at described punching hole and with described punching
Pressure hole seals and coordinates.
Inner high voltage moulding pipe hole-punching method the most according to claim 7, it is characterised in that punching is inlayed
Block (2) is removably mounted on die assembly.
Inner high voltage moulding pipe hole-punching method the most according to claim 7, it is characterised in that set of molds
Part includes that the first module (11) and the second module (12), the first module (11) and the second module (12) are joined
Closing and form die cavity, described receiving groove is arranged on the first module (11) and/or the second module (12).
Inner high voltage moulding pipe hole-punching method the most according to claim 7, it is characterised in that drive
Cylinder uses punching press oil cylinder, and spacing block piece (5) uses punching press drift.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291126.8A CN105921585A (en) | 2016-04-29 | 2016-04-29 | Punching method for internal high pressure forming pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291126.8A CN105921585A (en) | 2016-04-29 | 2016-04-29 | Punching method for internal high pressure forming pipe fitting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105921585A true CN105921585A (en) | 2016-09-07 |
Family
ID=56834260
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610291126.8A Pending CN105921585A (en) | 2016-04-29 | 2016-04-29 | Punching method for internal high pressure forming pipe fitting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105921585A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052126A (en) * | 2017-04-17 | 2017-08-18 | 无锡朗贤汽车组件研发中心有限公司 | Fittings hydraulic formation equipment |
| CN108787846A (en) * | 2018-05-31 | 2018-11-13 | 安徽扬子职业技术学院 | A kind of accurate molding machine of high-strength vehicle chassis part |
| CN110369593A (en) * | 2019-07-26 | 2019-10-25 | 山东舜博金属制品有限公司 | A kind of water swelling punching integrated machine |
| CN112170610A (en) * | 2020-09-15 | 2021-01-05 | 安徽江淮汽车集团股份有限公司 | Liquid-filling forming die and liquid-filling forming method |
| CN112372919A (en) * | 2020-11-13 | 2021-02-19 | 王仁权 | High-pressure forming equipment and method for perforated pipe |
| CN112692150A (en) * | 2020-12-11 | 2021-04-23 | 星火智慧(杭州)信息科技有限公司 | Divide water collector internal expanding machine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090038428A1 (en) * | 2005-02-15 | 2009-02-12 | Nsk Ltd. | Metal Member With Through Hole And Manufacturing Method Therefor |
| CN101454093A (en) * | 2006-02-15 | 2009-06-10 | 西德科汽车座椅技术有限责任公司 | Method and device for producing a cutout or aperture in the wall of a component formed according to the hydroforming process |
| CN102179439A (en) * | 2011-01-07 | 2011-09-14 | 西安交通大学 | Thick-wall pipe hydroforming device |
| CN102873165A (en) * | 2012-09-03 | 2013-01-16 | 北京航空航天大学 | Shock hydraulic composite forming process for small feature part of complex part |
| CN104338818A (en) * | 2013-08-01 | 2015-02-11 | 浙江摩多巴克斯汽配有限公司 | Internal high pressure forming equipment |
-
2016
- 2016-04-29 CN CN201610291126.8A patent/CN105921585A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090038428A1 (en) * | 2005-02-15 | 2009-02-12 | Nsk Ltd. | Metal Member With Through Hole And Manufacturing Method Therefor |
| CN101454093A (en) * | 2006-02-15 | 2009-06-10 | 西德科汽车座椅技术有限责任公司 | Method and device for producing a cutout or aperture in the wall of a component formed according to the hydroforming process |
| CN102179439A (en) * | 2011-01-07 | 2011-09-14 | 西安交通大学 | Thick-wall pipe hydroforming device |
| CN102873165A (en) * | 2012-09-03 | 2013-01-16 | 北京航空航天大学 | Shock hydraulic composite forming process for small feature part of complex part |
| CN104338818A (en) * | 2013-08-01 | 2015-02-11 | 浙江摩多巴克斯汽配有限公司 | Internal high pressure forming equipment |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107052126A (en) * | 2017-04-17 | 2017-08-18 | 无锡朗贤汽车组件研发中心有限公司 | Fittings hydraulic formation equipment |
| CN108787846A (en) * | 2018-05-31 | 2018-11-13 | 安徽扬子职业技术学院 | A kind of accurate molding machine of high-strength vehicle chassis part |
| CN110369593A (en) * | 2019-07-26 | 2019-10-25 | 山东舜博金属制品有限公司 | A kind of water swelling punching integrated machine |
| CN112170610A (en) * | 2020-09-15 | 2021-01-05 | 安徽江淮汽车集团股份有限公司 | Liquid-filling forming die and liquid-filling forming method |
| CN112372919A (en) * | 2020-11-13 | 2021-02-19 | 王仁权 | High-pressure forming equipment and method for perforated pipe |
| CN112692150A (en) * | 2020-12-11 | 2021-04-23 | 星火智慧(杭州)信息科技有限公司 | Divide water collector internal expanding machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105921585A (en) | Punching method for internal high pressure forming pipe fitting | |
| CN104338818B (en) | A kind of internal high pressure forming equipment | |
| CN104440584B (en) | A kind of abrasive Flow micro-hole polishing device and glossing thereof | |
| JPH10296347A (en) | Hydraulic bulging method of metal tube and device therefor | |
| BRPI1003606A2 (en) | cutting edge processes | |
| CN112975308B (en) | Processing technology for extrusion molding of pipe end with sealing groove | |
| CN110508661B (en) | Thin-wall annular piece forming method and die thereof | |
| JP4798060B2 (en) | Forging die | |
| CN101157114A (en) | A method for preparing rivet and rivet forging mold | |
| CN101028637A (en) | Liquid-expanding formation | |
| CN103624203A (en) | Machining method and machining die for T iron with high wire diameter ratio | |
| CN105945121B (en) | Cutting off apparatus and its technique in a kind of mould in internal high pressure forming equipment | |
| CN109894491A (en) | A kind of pitman shaft hot extrusion upsetting manufacturing process and its device | |
| CN107900181A (en) | A kind of automobile tail pipe former and application method | |
| CN211941204U (en) | Cab interior stamping die | |
| KR20060086252A (en) | Structure of manufacturing method of the high tension hose ring end piece and the punch which is affixed in the manufacture press mold and the manufacture press mold | |
| JP4826904B2 (en) | Manufacturing method of grooved plug | |
| CN2550088Y (en) | Shape expanding machine | |
| CN113828696A (en) | Three-way pipe forming device and forming method | |
| CN101670401A (en) | Hydraulic expanding die of oil storage drum of shock absorber | |
| CN100431733C (en) | Hydraulic expansion forming process | |
| KR20160143416A (en) | Apparatus for fabricating member of vehicle and method of fabricating the same | |
| CN109940087A (en) | Hole flanging mold and the mold are rushed by the method for embryo material machine-shaping | |
| CN202079177U (en) | Reducing jet pipe expansion composite mould | |
| JP2000317569A (en) | Forging method and forging die |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160907 |