CN102777763A - Non-heat-treatable strengthened aluminum alloy rectangular pipe blank applicable to forming rectangular pipe through drawing - Google Patents
Non-heat-treatable strengthened aluminum alloy rectangular pipe blank applicable to forming rectangular pipe through drawing Download PDFInfo
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- CN102777763A CN102777763A CN2012102702156A CN201210270215A CN102777763A CN 102777763 A CN102777763 A CN 102777763A CN 2012102702156 A CN2012102702156 A CN 2012102702156A CN 201210270215 A CN201210270215 A CN 201210270215A CN 102777763 A CN102777763 A CN 102777763A
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Abstract
The invention relates to the technical field of metal machining, in particular to a non-heat-treatable strengthened aluminum alloy rectangular pipe blank applicable to forming a rectangular pipe through drawing. The non-heat-treatable strengthened aluminum alloy rectangular pipe blank is formed through hot extrusion, and is characterized in that the cross section of the pipe blank is rectangular, wherein the rectangular cross section comprises four vertex angles, four edge middle sections and transition sections for connecting the vertex angles with the four edge middle sections; the four edge middle sections have the same thickness on each part; the rectangular cross section has the minimum thickness at each vertex angle and the maximum thickness at each edge middle section; and each vertex angle is connected with each edge middle section adjacent to the vertex angle through the transition section with increasing thickness. The non-heat-treatable strengthened aluminum alloy rectangular pipe blank has a simple structure and is convenient to manufacture, and the dimensional accuracy of a formed finished rectangular pipe is high.
Description
Technical field:
The present invention relates to the metalworking technology field, relate in particular to the not heat-treatable strengthened aluminum rectangular tube pipe that is suitable for drawing formation rectangular tube.
Background technique:
Along with the fast development in recent years of mixed power and pure electric automobile with popularize; Demand as the electrokinetic cell of its core component also increases day by day, and dimensional accuracy, thermal diffusivity, corrosion resistance and ability of anti-deformation that the electrokinetic cell shell requires also improve constantly.
Big cross section thin-walled rust-preventing aluminum alloy day by day becomes the important source material of battery case making because of good characteristics such as its light weight, thermal conductivity are good.But, have only through cold worked form and improve intensity because this type of big section thin-wall rust-preventing aluminum alloy intensity is low and can not heat treatment.
This type of rectangle tubing of preparation mainly adopts circular pipe as the drawing raw material at present, and the initial circular pipe generally will pass through multi-pass drawing elder generation moulding transition elliptical tube, again by transition elliptical tube drawing shaping finished product rectangular tube.The scheme technology that this employing initial circular pipe is made the finished product rectangular tube has that production procedure is long, manufacture cost is high, be difficult to realize the defective produced in enormous quantities.In addition; Material deformation is unreasonable everywhere in the cross section when drawing for circular pipe; Conformity and uniformity that the metal particle flows are relatively poor, tend to occur breaking, shaping problems such as the bight forms transverse crack, dimension overproof, wall unevenness is spared and inside surface roughness is not up to standard.
Summary of the invention:
The purpose of this invention is to provide and be suitable for the not heat-treatable strengthened aluminum rectangular tube pipe that drawing forms rectangular tube.It is simple in structure, easily manufactured, the finished product rectangular tube dimensional accuracy of moulding high.
The technological scheme that is suitable for the not heat-treatable strengthened aluminum rectangular tube pipe of drawing formation rectangular tube of the present invention is achieved in that
Be suitable for the not heat-treatable strengthened aluminum rectangular tube pipe that drawing forms rectangular tube; It is by heat extrusion compacting, and said pipe cross section is a rectangle, and this rectangular cross section comprises four drift angles, stage casing, four limits and is positioned at the changeover portion that each limit connects place drift angle and stage casing, limit, place; Thickness is identical everywhere for stage casing, four limits; Rectangular cross section is minimum in each drift angle place thickness, and is maximum in each stage casing, limit thickness, and each drift angle connects its each contiguous stage casing, limit through the changeover portion of progressive additive.
The present invention invents described pipe and compared with prior art has following advantage:
1. the pipe of existing manufacturing finished product rectangular tube is circular pipe, need through multi-pass drawing preforming transition elliptical tube again, at last by transition elliptical tube drawing becoming finished product rectangular tube.Rectangle pipe of the present invention can the shaping finished product rectangular tube after a time drawing.When having shortened manufacturing process, improve manufacturing efficiency, be convenient to mass production;
2. pipe provided by the invention is the rectangle pipe, and approximate with finished product rectangular tube shape, the rectangle pipe is when the material drawing forming; Four mobile suffered resistances of drift angle metal particles are maximum, and the stage casing is then less relatively, for obtaining uniform tubing; It is minimum to design four drift angle place thickness; Four drift angles connect corresponding rectangular cross section stage casing through the changeover portion of progressive additive, help to reduce bight and changeover portion metal particle resistance, to improve finished product tubing dimensional accuracy and productivity.
The thickness at each drift angle place of above-mentioned said pipe rectangular cross section is identical with finished product rectangular tube thickness, and each sectional shrinkage is identical with stage casing, four limits shrinkage on the changeover portion.
The changeover portion at place, the long limit of above-mentioned said each rectangle and the intersection, stage casing at place form first transition point, and the changeover portion at each rectangle minor face place and the intersection, stage casing at place form second transition point;
The long limit of pipe rectangular cross section rectangle is 107.5mm; Minor face is 31.9mm, stage casing, four limits wall thickness 1.25mm, and first transition point is 26.25mm apart from the distance of nearest minor face stage casing outer wall; Second transition point is 8.25mm apart from the distance of nearest stage casing, long limit outer wall, and each drift angle place thickness is 1mm.
The changeover portion at place, the long limit of above-mentioned said each rectangle and the intersection, stage casing at place form first transition point, and the changeover portion at each rectangle minor face place and the intersection, stage casing at place form second transition point;
The long limit of pipe rectangular cross section rectangle is 151.7mm; Minor face is 59.3mm, stage casing, four limits wall thickness 1.6mm, and first transition point is 37.6mm apart from the distance of nearest minor face stage casing outer wall; Second transition point is 15.2mm apart from the distance of nearest stage casing, long limit outer wall, and each drift angle place thickness is 1.4mm.
Description of drawings:
Below in conjunction with accompanying drawing the present invention is done detailed explanation:
Fig. 1 is the initial pipe cross sectional representation of the present invention;
Fig. 2 is a finished product rectangular tube cross sectional representation of the present invention;
Fig. 3 is an initial rectangular pipe design principle schematic representation of the present invention;
Fig. 4 is bight and the changeover portion enlarged diagram of Fig. 3;
Fig. 5 is a diffluence combination die schematic representation of making rectangular tube pipe of the present invention.
Embodiment:
Like Fig. 1, Fig. 2, Fig. 3, shown in Figure 4; Be suitable for the not heat-treatable strengthened aluminum rectangular tube pipe that drawing forms rectangular tube; It is by heat extrusion compacting, and its design cross section is a rectangle, and rectangular cross section comprises four drift angles 1, stage casing, four limits 2 and the changeover portion 3 that connects drift angle 1 and each stage casing, limit 2; Thickness β is identical everywhere in stage casing, four limits 2; Each drift angle thickness alpha of rectangular cross section is minimum, and each stage casing, limit thickness β is maximum, and each drift angle 1 connects its each contiguous stage casing, limit 2 respectively through the changeover portion 3 of progressive additive.Said each apex thickness is identical with finished product rectangular tube thickness γ, and each sectional shrinkage is identical with stage casing, four limits 2 shrinkages on the changeover portion 3.
The changeover portion 3 at place, the long limit of said each rectangle forms first transition point 7 with 2 intersections, stage casing at place, and the changeover portion 3 at each rectangle minor face place forms second transition point 8 with 2 intersections, stage casing at place;
Pipe rectangular cross-sectional face length limit is 107.5mm; Minor face is 31.9mm, stage casing, four limits 2 wall thickness 1.25mm, and first transition point 7 is 26.25mm apart from the distance of nearest minor face stage casing 2 outer walls; Second transition point 8 is 8.25mm apart from the distance of nearest stage casing, long limit 2 outer walls, and each drift angle 1 place's thickness is 1mm;
Manufactured finished rectangle pipe range limit is 102mm, and minor face is 30mm, and each limit and drift angle thickness γ are 1mm.
The rectangle pipe is when the material drawing forming; Four mobile suffered resistances of bight metal particles are maximum, and stage casing 2 is then less relatively, for obtaining uniform tubing; It is minimum to design four drift angles, 1 place's thickness; Four drift angles 1 connect corresponding rectangular cross section stage casing 2 through the changeover portion 3 of progressive additive, help to reduce bight and changeover portion 3 metal particle resistances, to improve finished product tubing dimensional accuracy and productivity.
Another preferred version as this pipe embodiment:
The long limit of pipe rectangular cross section rectangle is 151.7mm; Minor face is 59.3mm; Stage casing, four limits 2 wall thickness 1.6mm; First transition point 7 is 37.6mm apart from the distance of nearest minor face stage casing 2 outer walls, and second transition point 8 is 15.2mm apart from the distance of nearest stage casing, long limit 2 outer walls, and each drift angle 1 place's thickness is 1.4mm;
Manufactured finished rectangle pipe range limit is 146.8mm, and minor face is 57.2mm, and each limit and drift angle γ thickness are 1.4mm.
As shown in Figure 5, rectangular tube pipe of the present invention is made by a diffluence combination die, and diffluence combination die comprises mould bridge 4, die cavity 5, patrix 6, counterdie 9 and core rod 10.During hot extrusion, ingot casting is divided into four strands of metal flow loading mould cavities by mould bridge 4, and in the 4 bottom seam of mould bridge, flows out through the gap between counterdie 6 and the core rod 10 again.This method is owing to coaxality cooperation preferably between mould, recipient, the pressure ram three, and the initial rectangular pipe evenness of wall thickness degree that obtains is higher, meets the design size requirement.
According to the foregoing description, the transversal face length of finished product rectangular tube limit, minor face, the wall thickness dimension precision that produces can reach respectively ± 0.1mm, ± 0.1mm, ± 0.02mm; Solved in the drawing process that pipe is broken, the bight forms problems such as transverse crack.Product performance significantly improve, and reach the H14 level.
Be a kind of mode of execution that combines particular content to provide as stated, can not assert that practical implementation of the present invention is confined to these explanations.For example: each item size of said rectangle pipe is not limited in the data that embodiment announces.All approximate, identical with the inventive method, structure etc., or, all should be regarded as protection scope of the present invention for making some technological deduction or replace under the inventive concept prerequisite.
Claims (4)
1. be suitable for the not heat-treatable strengthened aluminum rectangular tube pipe that drawing forms rectangular tube; It is characterized in that by heat extrusion compacting: said pipe cross section is a rectangle, and this rectangular cross section comprises four drift angles, stage casing, four limits and is positioned at the changeover portion that each limit connects place drift angle and stage casing, limit, place; Thickness is identical everywhere for stage casing, four limits; Rectangular cross section is minimum in each drift angle place thickness, and is maximum in each stage casing, limit thickness, and each drift angle connects its each contiguous stage casing, limit through the changeover portion of progressive additive.
2. the not heat-treatable strengthened aluminum rectangular tube pipe that is suitable for drawing formation rectangular tube according to claim 1; It is characterized in that: the thickness at each drift angle place of said pipe rectangular cross section is identical with finished product rectangular tube thickness, and each sectional shrinkage is identical with stage casing, four limits shrinkage on the changeover portion.
3. according to the described not heat-treatable strengthened aluminum rectangular tube pipe that is suitable for drawing formation rectangular tube of one of claim 1 to 2, it is characterized in that:
The changeover portion at place, the long limit of said each rectangle and the intersection, stage casing at place form first transition point, and the changeover portion at each rectangle minor face place and the intersection, stage casing at place form second transition point;
The long limit of pipe rectangular cross section rectangle is 107.5mm; Minor face is 31.9mm, stage casing, four limits wall thickness 1.25mm, and first transition point is 26.25mm apart from the distance of nearest minor face stage casing outer wall; Second transition point is 8.25mm apart from the distance of nearest stage casing, long limit outer wall, and each drift angle place thickness is 1mm.
4. according to the described not heat-treatable strengthened aluminum rectangular tube pipe that is suitable for drawing formation rectangular tube of one of claim 1 to 2, it is characterized in that:
The changeover portion at place, the long limit of said each rectangle and the intersection, stage casing at place form first transition point, and the changeover portion at each rectangle minor face place and the intersection, stage casing at place form second transition point;
The long limit of pipe rectangular cross section rectangle is 151.7mm; Minor face is 59.3mm, stage casing, four limits wall thickness 1.6mm, and first transition point is 37.6mm apart from the distance of nearest minor face stage casing outer wall; Second transition point is 15.2mm apart from the distance of nearest stage casing, long limit outer wall, and each drift angle place thickness is 1.4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210270215.6A CN102777763B (en) | 2012-07-31 | 2012-07-31 | Non-heat-treatable strengthened aluminum alloy rectangular pipe blank applicable to forming rectangular pipe through drawing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210270215.6A CN102777763B (en) | 2012-07-31 | 2012-07-31 | Non-heat-treatable strengthened aluminum alloy rectangular pipe blank applicable to forming rectangular pipe through drawing |
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| Publication Number | Publication Date |
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| CN102777763A true CN102777763A (en) | 2012-11-14 |
| CN102777763B CN102777763B (en) | 2014-04-23 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050126246A1 (en) * | 2003-12-12 | 2005-06-16 | Dragos Ungurean | Solid shapes extrusion |
| CN201960100U (en) * | 2011-03-17 | 2011-09-07 | 大连大山结晶器有限公司 | Copper pipe of continuous casting square billet crystallizer |
| CN102172665A (en) * | 2011-01-04 | 2011-09-07 | 重庆大学 | High-precision aluminum alloy rectangular tube forming method |
| CN102284547A (en) * | 2011-06-23 | 2011-12-21 | 重庆大学 | Method for processing rectangular aluminum alloy waveguide through multi-pass rolling drawing |
| CN202100928U (en) * | 2011-06-10 | 2012-01-04 | 江苏界达特异新材料股份有限公司 | Seamless tube for front axle of tractor |
-
2012
- 2012-07-31 CN CN201210270215.6A patent/CN102777763B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050126246A1 (en) * | 2003-12-12 | 2005-06-16 | Dragos Ungurean | Solid shapes extrusion |
| CN102172665A (en) * | 2011-01-04 | 2011-09-07 | 重庆大学 | High-precision aluminum alloy rectangular tube forming method |
| CN201960100U (en) * | 2011-03-17 | 2011-09-07 | 大连大山结晶器有限公司 | Copper pipe of continuous casting square billet crystallizer |
| CN202100928U (en) * | 2011-06-10 | 2012-01-04 | 江苏界达特异新材料股份有限公司 | Seamless tube for front axle of tractor |
| CN102284547A (en) * | 2011-06-23 | 2011-12-21 | 重庆大学 | Method for processing rectangular aluminum alloy waveguide through multi-pass rolling drawing |
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| CN102777763B (en) | 2014-04-23 |
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