CN206215732U - A kind of internal high pressure forming mould for shaping hierarchic structure pipe fitting - Google Patents
A kind of internal high pressure forming mould for shaping hierarchic structure pipe fitting Download PDFInfo
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- CN206215732U CN206215732U CN201621280434.2U CN201621280434U CN206215732U CN 206215732 U CN206215732 U CN 206215732U CN 201621280434 U CN201621280434 U CN 201621280434U CN 206215732 U CN206215732 U CN 206215732U
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Abstract
The utility model discloses a kind of internal high pressure forming mould for shaping hierarchic structure pipe fitting, including upper die and lower die, left bushing, right bushing, left drift and right drift；Left and right bushing being capable of move toward one another in forming process for the utility model.Phase before forming, left and right bushing has an initial distance with pipe fitting cavity lateral, and suitably increase axial feeding by left and right drift carries out feed supplement to middle bulging position；Shaping later stage, left and right drift stops axial feed, and left and right bushing starts move toward one another, and a thrust is applied to middle bulging position, and in the process, bulging position side wall is not fitted completely with left and right bushing, and the frictional force between tubing and mould will be greatly reduced.Therefore, pressure needed for the shaping of fillet position will be significantly reduced, wall thickness reduction is obviously reduced, can accomplish while meeting with hierarchic structure pipe fitting forming requirement, to reduce the requirement to clamping pressure machine maximum tonnage, the pressure of bearing capacity, the reliability of sealing structure and booster needed for mould.
Description
Technical field
The utility model belongs to pipe fitting plastic forming technology field, more particularly to a kind of interior height for shaping hierarchic structure pipe fitting
Pressing formation mould.
Background technology
Between the more than ten years in past, increasingly serious market competition and environmental protection policy forces auto manufacturing to turn product type
It is changed into production light vehicle and reaches the vehicle structure purpose that low oil consumption, low emission ensure safety simultaneously.In order to as far as possible with low cost
Effectively achieve this purpose, it is necessary to which exploitation uses new lightweight material, alloy or composite；And research and develop and improve new
Above-mentioned lightweight material is converted into manufacturing technology lightweight, low cost, intensity is high, steady quality functional structure.From last century
The nineties rise, forming high pressure in pipe due to the remarkable advantage such as low cost, flexible high, formed product intensity is high, lightweight,
All kinds of hollow light body components of manufacture are widely used in Automobile Industry Abroad.Tube Hydroforming (also known as internal high pressure forming) is a kind of
The advanced manufacturing technology of hollow integrated member is manufactured, is had compared with the hollow unit manufacturing process welded after traditional first punching press
Obvious advantage, can improve the strength and stiffness of pipe fitting while reduces cost.Therefore in automobile, Aeronautics and Astronautics manufacture neck
Domain, has obtained wide application.Especially in automobile production, such as subframe of car, dashboard cross member, all gradually with
Inner high voltage hydraulic forming method substitutes original traditional diamond-making technique.For many pipe fittings, such as with hierarchic structure, taper knot
The pipe fitting of structure and rectangular configuration, it is one of main target to obtain a horn structure.
The internal high pressure forming mould of existing hierarchic structure pipe fitting uses monoblock type, and the diameter of intermediate cavity bulging is big
Small, wall thickness reduction and the radius of corner size of shaping are only capable of being optimized by changing axial feed and internal pressure load path,
The drawbacks of this mould structure has one substantially, when bulging terminates substantially, when shaping hierarchic structure fillet accounts for leading, due to pipe
Friction between material and mould, the means for changing axial feed and internal pressure load path will be difficult to work, and with tubing wall
Thick increase and the application of high strength linepipe, using traditional internal high pressure forming mould, the forming pressure of horn structure will be entered
One step is improved, and the equipment of even resulting in can not meet requirement, in addition with the increase of forming pressure, the friction between tubing and mould
Power is also significantly increased, and the easy excessive thinning of wall thickness even ftractures in causing fillet stowing operation.
The content of the invention
To solve the above mentioned problem that prior art is present, the utility model will design one kind and can reduce to clamping pressure machine
The requirement of the pressure of bearing capacity, the reliability of sealing structure and booster needed for maximum tonnage, mould, and ensure that fillet fills
The satisfactory internal high pressure forming mould of wall thickness during filling out.
To achieve these goals, the technical solution of the utility model is as follows：
A kind of internal high pressure forming mould for shaping hierarchic structure pipe fitting, including upper die and lower die, left bushing, right bushing, Zuo Chong
Head and right drift；High pressure water hole is provided with described left drift；It is cased with being cased with the right side outside left bushing, right drift outside described left drift
Bushing, described left bushing and right bushing are located at the left and right sides between upper die and lower die respectively；Described upper die and lower die, a left side
Bushing and right bushing composition mold cavity, mold cavity two ends are sealed by left drift and right drift；Described left bushing and right lining
Set has the function of axially being moved left and right along left drift and right drift respectively；Described upper die and lower die, left bushing and right bushing
Final shaping position composition pipe fitting die cavity.
Manufacturing process of the present utility model, comprises the following steps：
A, the left drift of promotion and right drift are axially inwardly moved simultaneously, complete tubing or so two sealings of end；
B, upper mould and lower mould is driven to complete matched moulds by clamping pressure machine sliding block, highly pressurised liquid is by the water under high pressure on left drift
Hole enters inside tubing, while left drift and right drift are while axial feed is apart from s1, make the big portion in tube bulge part and upper mould
Fitted with lower mould；
C, left drift and right drift stop motion, under forming pressure P, left bushing and right bushing are opened by initial position simultaneously
Begin axially inwardly displacement s0, until the pipe fitting cavity lateral respectively with the left and right sides is fitted, pressurize or raising pressure are to pipe
Part is formed, and shaping terminates rear release and molds pickup；
Described left bushing and right bushing must be fulfilled for the initial distance s of the pipe fitting cavity lateral of the left and right sides respectively as
Lower condition could be shaped compared with small round corner, while preventing vertical section from fold defect occur, the value of s is determined by formula (1)：
In formula, D is the diameter for shaping boss, and d is pipe diameter；
In left bushing and right bushing moving process, its displacement s0Relation with forming pressure P need to meet following relation
Formula (2)；
In formula, t is tube wall thickness, σsThe yield strength of tubing；
Described left drift and the axial feeding s of right drift1Value by shaping pipe fitting bulging constancy of volume principle calculate
Obtain, s1Value by formula (3) determine：
In formula, H is the length for shaping boss.
Compared with prior art, the utility model has the advantages that：
Be changed to for original monoblock type internal high pressure forming mould split type by the utility model, newly increases left bushing and right bushing
Two parts, left and right bushing being capable of move toward one another in forming process.Before forming the phase, left and right bushing and pipe fitting cavity lateral have one
Individual initial distance, suitably increases axial feeding to carry out feed supplement to middle bulging position by left and right drift；It is the shaping later stage, left
Right drift stops axial feed, and now, left and right bushing starts move toward one another, and a thrust is applied to middle bulging position, passes through
Bulging position side wall produces a components of stress for radial direction, promotes straight section material dynamic to the displacement of shaping dies fillet part, this
During, internal pressure can actually play a part of back pressure, also have a upward components of stress to bulging position side wall, be conducive to
The filling of bulging position small fillet radius, in addition in the process, bulging position side wall is not fitted completely with left and right bushing, tubing
Frictional force between mould will be greatly reduced.Therefore, compared with the simple bulging of original monolithic mold tubing, fillet position
Pressure needed for shaping will be significantly reduced, and wall thickness reduction is obviously reduced, and can accomplish meeting with hierarchic structure pipe fitting forming
It is required that while, reduce to clamping pressure machine maximum tonnage, bearing capacity, the reliability of sealing structure and supercharging needed for mould
The requirement of the pressure of device, so as to reduce production cost, and contributes to tube wall thickness uniform, it is to avoid the wall thickness in forming process is excessive
Thinning and cracking.
Brief description of the drawings
The utility model has 3, accompanying drawing, wherein：
Fig. 1 is the shaping dies schematic diagram of embodiment of the present utility model 1.
Fig. 2 is the shaping dies schematic diagram of embodiment of the present utility model 2.
Fig. 3 is the A-A of Fig. 2 to profile.
In figure：1-upper mould；2-tubing；3-lower mould；4-left bushing；5-right bushing；6-left drift；7-right drift；
8-high pressure water hole；9-pipe fitting；10-pipe fitting cavity lateral；11-shaping boss.
Specific embodiment
The utility model is described further below in conjunction with drawings and Examples.As shown in figure 1, a kind of shaping ladder knot
The internal high pressure forming mould of structure pipe fitting 9, including upper mould 1, lower mould 3, left bushing 4, right bushing 5, left drift 6 and right drift 7；It is described
Left drift 6 on be provided with high pressure water hole 8；It is cased with being cased with right bushing 5 outside left bushing 4, right drift 7 outside described left drift 6, it is described
Left bushing 4 and right bushing 5 be located at the left and right sides between upper mould 1 and lower mould 3 respectively；Described upper mould 1, lower mould 3, left bushing
4 and right bushing 5 composition mold cavity, mold cavity two ends are sealed by left drift 6 and right drift 7；Described left bushing 4 and right lining
Set 5 has the function of axially being moved left and right along left drift 6 and right drift 7 respectively；Described upper mould 1, lower mould 3, left bushing 4 and the right side
The final shaping position composition pipe fitting die cavity of bushing 5.
Manufacturing process of the present utility model, comprises the following steps：
A, the left drift 6 of promotion and right drift 7 are axially inwardly moved simultaneously, complete 2 or so two sealings of end of tubing；
B, upper mould 1 and lower mould 3 is driven to complete matched moulds by clamping pressure machine sliding block, highly pressurised liquid is by the height on left drift 6
Pressure water hole 8 enters inside tubing 2, while left drift 6 and right drift 7 are while axial feed is apart from s1, make the bulging part of tubing 2 big
Fitted with upper mould 1 and lower mould 3 in portion；
C, left drift 6 and the stop motion of right drift 7, under forming pressure P, left bushing 4 and right bushing 5 are simultaneously by initial bit
Put beginning axially inwardly displacement s0, until the pipe fitting cavity lateral 10 respectively with the left and right sides is fitted, pressurize or raising are pressed
Power is formed to pipe fitting 9, and shaping terminates rear release and molds pickup；
The initial distance s of described left bushing 4 and right bushing 5 respectively with the pipe fitting cavity lateral 10 of the left and right sides must expire
The following condition of foot could be shaped compared with small round corner, while preventing vertical section from fold defect occur, the value of s is determined by formula (1)：
In formula, D is the diameter for shaping boss 11, and d is the diameter of tubing 2；
In left bushing 4 and the moving process of right bushing 5, its displacement s0Relation with forming pressure P need to be met with ShiShimonoseki
It is formula (2)；
In formula, t is the wall thickness of tubing 2, σsThe yield strength of tubing 2；
Described left drift 6 and the axial feeding s of right drift 71Value by the bulging constancy of volume principle meter of shaping pipe fitting 9
Obtain, s1Value by formula (3) determine：
In formula, H is the length for shaping boss 11.
The utility model is described further below by embodiment.
Embodiment 1：As shown in figure 1, shaping pipe fitting 9 is variable diameters straight tube bulging pipe fitting, the material of tubing 2 is DC04, diameter
It is 60mm, thickness is 1.5mm, a diameter of 80mm at middle bulging position, length is 100mm.
Using traditional internal high pressure forming mould, forming pressure is 120MPa, and the left and right amount of feeding is 18mm, and load path is
Linear loading.Through the least radius 8mm of pipe fitting 9 after internal high pressure forming process forming, minimum wall thickness (MINI W.) 1.036mm, reduction reaches
30%.
Testpieces is formed using the internal high pressure forming mould of shaping hierarchic structure pipe fitting 9 of the present utility model, it is left
3mm is taken apart from s between right bushing and pipe fitting cavity lateral 10, load path is identical with traditional internal high pressure forming mould, and internal pressure is only
Linear loading to 100MPa is needed, is 0.8mm, minimum wall thickness (MINI W.) through the least radius of pipe fitting 9 after internal high pressure forming process forming
1.135mm, maximum reduction is 24%.
Embodiment 2：As Figure 2-3, shaping pipe fitting 9 is that, with complicated axis bulging class pipe fitting, the material of tubing 2 is
DC04, a diameter of 56mm, thickness is 1.5mm, and the height of centre shaping boss 11 reaches 10mm, and length is 50mm.
Using traditional internal high pressure forming mould, forming pressure is 150MPa, and the left and right amount of feeding is 18mm, and load path is
Linear loading.Through the least radius 4.5mm of pipe fitting 9 after internal high pressure forming process forming, minimum wall thickness (MINI W.) 0.959mm, reduction reaches
36.1%.
Testpieces is formed using the internal high pressure forming mould of shaping hierarchic structure pipe fitting 9 of the present utility model, it is left
4mm is taken apart from s between right bushing and pipe fitting cavity lateral 10, load path is identical with traditional internal high pressure forming mould, and internal pressure is only
Need linear loading to 150MPa, through the least radius of pipe fitting 9 after internal high pressure forming process forming be 3mm, minimum wall thickness (MINI W.) 1.04mm,
Maximum reduction is 30.7%.
Claims (1)
1. one kind shapes the internal high pressure forming mould of hierarchic structure pipe fitting (9), it is characterised in that：Including upper mould (1), lower mould (3),
Left bushing (4), right bushing (5), left drift (6) and right drift (7), high pressure water hole (8) is provided with described left drift (6)；Institute
It is cased with being cased with right bushing (5), described left bushing (4) and right bushing outside left bushing (4), right drift (7) outside the left drift (6) stated
(5) left and right sides between upper mould (1) and lower mould (3) is located at respectively；Described upper mould (1), lower mould (3), left bushing (4) and the right side
Bushing (5) constitutes mold cavity, and mold cavity two ends are sealed by left drift (6) and right drift (7)；Described left bushing (4) and
Right bushing (5) has the function of axially being moved left and right along left drift (6) and right drift (7) respectively；Described upper mould (1), lower mould
(3), the final shaping position composition pipe fitting die cavity of left bushing (4) and right bushing (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621280434.2U CN206215732U (en) | 2016-11-24 | 2016-11-24 | A kind of internal high pressure forming mould for shaping hierarchic structure pipe fitting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621280434.2U CN206215732U (en) | 2016-11-24 | 2016-11-24 | A kind of internal high pressure forming mould for shaping hierarchic structure pipe fitting |
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| CN206215732U true CN206215732U (en) | 2017-06-06 |
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| CN201621280434.2U Active CN206215732U (en) | 2016-11-24 | 2016-11-24 | A kind of internal high pressure forming mould for shaping hierarchic structure pipe fitting |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106670296A (en) * | 2016-11-24 | 2017-05-17 | 重集团大连设计研究院有限公司 | Internal high-pressure forming die for forming pipe fitting of step structure and forming method thereof |
| CN107639143A (en) * | 2017-10-17 | 2018-01-30 | 安徽跃鑫管业有限公司 | For patch mold forming method and equipment with internal cavity thin wall metalwork |
| CN114160666A (en) * | 2021-11-10 | 2022-03-11 | 湖州金螺智能科技有限公司 | Thin-wall stainless steel clamping and pressing pipe fitting forming device |
-
2016
- 2016-11-24 CN CN201621280434.2U patent/CN206215732U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106670296A (en) * | 2016-11-24 | 2017-05-17 | 重集团大连设计研究院有限公司 | Internal high-pressure forming die for forming pipe fitting of step structure and forming method thereof |
| CN106670296B (en) * | 2016-11-24 | 2018-06-26 | 一重集团大连设计研究院有限公司 | A kind of manufacturing process for the internal high pressure forming mold for shaping hierarchic structure pipe fitting |
| CN107639143A (en) * | 2017-10-17 | 2018-01-30 | 安徽跃鑫管业有限公司 | For patch mold forming method and equipment with internal cavity thin wall metalwork |
| CN114160666A (en) * | 2021-11-10 | 2022-03-11 | 湖州金螺智能科技有限公司 | Thin-wall stainless steel clamping and pressing pipe fitting forming device |
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