CN204628826U - The lightweight special high-strength pipe fitting of inner high voltage near-net-shape - Google Patents
The lightweight special high-strength pipe fitting of inner high voltage near-net-shape Download PDFInfo
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- CN204628826U CN204628826U CN201520170170.4U CN201520170170U CN204628826U CN 204628826 U CN204628826 U CN 204628826U CN 201520170170 U CN201520170170 U CN 201520170170U CN 204628826 U CN204628826 U CN 204628826U
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Abstract
The utility model relates to a kind of lightweight special high-strength pipe fitting of inner high voltage near-net-shape, it is characterized in that: this pipe fitting is loaded on automobile side-door to boot side place, it comprises body (1), this body (1) is pipe, described body (1) comprises the first crosspiece (2), the left end of described first crosspiece (2) is overstriking section (3), the right-hand member of described first crosspiece (2) is connected with the left end of interior curved segment (5) by the first arc section (4), the right-hand member of described interior curved segment (5) is connected with the left end of the second crosspiece (7) by the second arc section (6), the left end of described interior curved segment (5) outside, right-hand member is interior.The lightweight special high-strength pipe fitting of this inner high voltage near-net-shape solve special-shaped high-strength tubular part be in the past shaped after large, the difficult problem such as quality is unstable, the life-span is short of weight, avoid body thinning excessively or the phenomenon of cracking.
Description
Technical field
The utility model relates to a kind of lightweight special high-strength pipe fitting, and these tubular construction component, by inner high voltage near-net-shape, are mainly used on automobile, and have high tough, the advantage of light weight, belongs to fabricated metals technical field.
Background technique
Domestic automobile industry adopts the operations such as thermoforming, welding, shaping, surface treatment to manufacture steel tubing in different shapes type component always, its performance and workmanship are starkly lower than the product such as moral, Great Britain and America, and such processing technology is not only complicated, and efficiency is low, and the unstable product quality of final molding, the life-span is short.
Hydroforming technology is the U.S., the novel forming technique of the Germany's invention nineties in last century, at first at space satellite launcher, application is obtained during the component such as Airplane's Oil Way system manufacture, and extend to automobile rapidly, the industries such as rail vehicle, solve " point body heat punching+welding+school shape " technology manufacture pipe (shell) class part performance unstable, precision is not enough, the technique bottleneck difficult problems such as inefficiency, internal high pressure forming technique makes part structure refinement, grain flow is controlled, performance is significantly improved, that variable diameters becomes wall thickness special-shaped shell type component high-quality, efficiently, the most effective process engineering that low consumption manufacture is shaped, it is current international shaping investigation and application new technology with the fastest developing speed.
But because hydroforming technology is the symphyogenetic complicated forming process of interior pressure and axial feed, if inside press through height, will thinning excessively or cracking, if the excessive pipe flexing or wrinkling of will causing of axial feed, technical difficulty is large, high to material, formation technique and equipment Requirement.If inside press through height, will thinning excessively or cracking, pipe flexing or wrinkling will be caused if axial feed is excessive, huge on forming quality impact on inner high voltage load mode, loading velocity, load deflection size, direction etc., simultaneously higher to the mechanical property requirements of tubing, technology and device is comparatively complicated.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, a kind of lightweight special high-strength pipe fitting of inner high voltage near-net-shape is provided, it solve special-shaped high-strength tubular part be in the past shaped after large, the difficult problem such as quality is unstable, the life-span is short of weight, avoid body thinning excessively or the phenomenon of cracking.
The purpose of this utility model is achieved in that
The lightweight special high-strength pipe fitting of the utility model inner high voltage near-net-shape, this pipe fitting is loaded on automobile side-door to boot side place, it comprises body, this body is pipe, and described body comprises the first crosspiece, and the left end of described first crosspiece is overstriking section, the right-hand member of described first crosspiece is connected with the left end of interior curved segment by the first arc section, the right-hand member of described interior curved segment is connected by the left end of the second arc section with the second crosspiece, and outside, right-hand member is interior for the left end of described interior curved segment.
Compared with prior art, the beneficial effects of the utility model are:
The lightweight special high-strength pipe fitting of the utility model inner high voltage near-net-shape is compared with technology in the past, solve the difficult problems such as special-shaped high-strength tubular part formation technique is complicated, weight is large, quality is unstable, the life-span is short, efficiency is low in the past, avoid body thinning excessively or the phenomenon of cracking, effectively substitute import, for automobile, space flight, aviation, vehicle etc. provide high-quality component, to the lightweight realized under high security and energy-saving and emission-reduction significant.
Accompanying drawing explanation
Fig. 1 is the structural representation of the lightweight special high-strength pipe fitting of the utility model inner high voltage near-net-shape.
Wherein: body 1, first crosspiece 2, overstriking section 3, first arc section 4, interior curved segment 5, second arc section 6, second crosspiece 7.
Embodiment
The utility model relates to a kind of lightweight special high-strength pipe fitting of inner high voltage near-net-shape, this pipe fitting is loaded on automobile side-door to boot side place, it comprises body 1, this body 1 is pipe, described body 1 comprises the first crosspiece 2, the left end of described first crosspiece 2 is overstriking section 3, this overstriking section 3 plays the effect of fastening strength, the right-hand member of described first crosspiece 2 is connected with the left end of interior curved segment 5 by the first arc section 4, the right-hand member of described interior curved segment 5 is connected with the left end of the second crosspiece 7 by the second arc section 6, outside, right-hand member is interior for the left end of described interior curved segment 5.
The process step of this special high-strength pipe fitting is as follows:
Step one, tubing CNC cutting
Pipe adopts low-carbon and low-alloy Composition Design, reduces carbon and silicone content, improves Mn/C ratio, adds trace element vanadium, niobium, titanium, aluminium, breaks through the key technologies such as smelting purification, hot rolling, structure property control;
Step 2, pretreatment
Have developed microalloy tubing heat treatment equipment, by pipe by after continuous roller bottom type heat treatment furnace, carry out water-spraying control and quenching-and-tempering process, tubing plasticity is made to reach more than 35%, strain hardening index n value between 0.16-0.18, Lankford r value more than 1.2, tubing intensity and plasticity ratio good, formability is good, can meet multidirectional expansion shaping needs.
Step 3, tubing preforming
By mould, twice preforming is carried out to tubing, by controlling axial force and interior pressure, obtain the useful wrinkle shape and the quantity that meet certain geometric condition and mechanical condition, make this wrinkle can play preformed effect when subsequent pressurization shaping, favourable reducer pipe fitting internal high pressure forming, improve reducer pipe forming limit, tubing cross section can be become rectangle, other shapes such as trapezoidal.
Step 4, internal high pressure forming
Preparation multi-freedom degree internal high pressure forming equipment, NC postprocessing outfit carry out internal high pressure forming to tubing, invent internal high pressure forming load mode, solve a ultrahigh pressure motive sealing difficult problem, the closed loop control achieving the above ultrahigh pressure stabilized seal of conditions of manufacture 400MPa and loading curve highi degree of accuracy is responded fast, to given loading curve from motion tracking, signal and the Controlling model of foundation online feedback sensing achieve quick response, ensure that the quality of forming tubular product, precision and cycle.The coupling of axial displacement and fluid pressure in forming process, reaches control accuracy: interior pressure ± 0.5Mpa, displacement ± 0.05mm; Complete the development that expansivity reaches 110% part;
Internal high pressure forming and porous punching press composite manufacturing technology, all there is one or more hole or plugging tube piece in a lot of tubing, shell type component, makes internal high pressure forming more difficult, by arranging multiple punching cylinder on mould, realizes porous synchronous punching.Solve the internal high pressure forming key technology of the labyrinths such as Fast Filling, synchronous punching, precision controlling, achieve the composite sync manufacture of the shell type component being with multiple hole, wall thickness accuracy reaches 0.3mm.
Step 5, near-net-shape
By applying powerful water or gas high pressure to the inside of special-shaped tubing, shell type component, make pipe, shells that the amount of deformation preset occur according to the direction of design, the near-net-shape of component can be realized, the key technology such as pressure and wrinkle controls, preliminary shaping method in this project breaches and loads, limit expansivity reaches 70.3%.
Exactly because the aximal deformation value of the lightweight special high-strength pipe fitting internal high pressure forming of this inner high voltage near-net-shape, deformation direction, size are controlled, thus the tissue of drip molding easily obtains refinement, performance obtains raising, accuracy of manufacturing and stock utilization significantly rise, the consumption of material, the consumption of energy are all decreased significantly, production process cleans the distinguishing features such as green non-pollution, can reduce the overall weight of component, spillage of material and cost of production comparatively significantly.
Claims (1)
1. the lightweight special high-strength pipe fitting of an inner high voltage near-net-shape, it is characterized in that: this pipe fitting is loaded on automobile side-door to boot side place, it comprises body (1), this body (1) is pipe, described body (1) comprises the first crosspiece (2), the left end of described first crosspiece (2) is overstriking section (3), the right-hand member of described first crosspiece (2) is connected with the left end of interior curved segment (5) by the first arc section (4), the right-hand member of described interior curved segment (5) is connected with the left end of the second crosspiece (7) by the second arc section (6), the left end of described interior curved segment (5) outside, right-hand member is interior.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520170170.4U CN204628826U (en) | 2015-03-25 | 2015-03-25 | The lightweight special high-strength pipe fitting of inner high voltage near-net-shape |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520170170.4U CN204628826U (en) | 2015-03-25 | 2015-03-25 | The lightweight special high-strength pipe fitting of inner high voltage near-net-shape |
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| Publication Number | Publication Date |
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| CN204628826U true CN204628826U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520170170.4U Active CN204628826U (en) | 2015-03-25 | 2015-03-25 | The lightweight special high-strength pipe fitting of inner high voltage near-net-shape |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689487A (en) * | 2016-03-30 | 2016-06-22 | 江苏界达特异新材料股份有限公司 | Diameter-changing performing technology and diameter-reducing device of internal high-pressure forming tube |
-
2015
- 2015-03-25 CN CN201520170170.4U patent/CN204628826U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689487A (en) * | 2016-03-30 | 2016-06-22 | 江苏界达特异新材料股份有限公司 | Diameter-changing performing technology and diameter-reducing device of internal high-pressure forming tube |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |