CN105363869A - Spinning method for high-precision large-size thin-wall aluminum alloy pipes - Google Patents
Spinning method for high-precision large-size thin-wall aluminum alloy pipes Download PDFInfo
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Abstract
The invention belongs to the technical field of metal material machining and particularly relates to a spinning method for high-precision large-size thin-wall aluminum alloy pipes. The method is characterized in that the machining size and mounting precision of a core mold, the step spinning roller structure, the wall thickness precision of a blank and the temperature of a deformation area are strictly controlled, and multiple spinning processes are set on the basis of controlling the above elements. The precision of the large-size thin-wall aluminum alloy pipes machined through the method is remarkably improved, and the problems of pipe bending and super-poor straightness in the traditional spinning machining process are solved.
Description
Technical field
The invention belongs to metal material processing technical field, particularly a kind of high-accuracy large-scale thin-wall aluminum alloy tubing spin-on process.
Background technology
High-accuracy large-scale thin-wall aluminum alloy tubing is widely used in aerospace field, in order to ensure the forming property of tubing in the processing such as follow-up bending, enlarging, flattening and the reliability in using, strict quality requirement is proposed to aspects such as size of pipe and tubing precision, surface quality, structure properties.
Shear spinning technique does feed motion by spinning roller, stresses on the metal stock rotated along same axis with core, makes it produce continuous print local plastic deformation and become required hollow revolving parts.Rotary pressing processing tube wall thickness is even, and the especially circumferential performance of dense structure's performance is good, and dimensional accuracy is high, but easily occurs bending pipes, the problem that linearity is overproof in large size, thin walled aluminium alloy pipe employing rotary pressing processing process.
Summary of the invention
Not enough for prior art, the invention provides a kind of high-accuracy large-scale thin-wall aluminum alloy tubing spin-on process.
A kind of high-accuracy large-scale thin-wall aluminum alloy tubing spin-on process, described tubing permission machining deviation is: outside dimension deviation ± 0.2mm, wall thickness tolerance ± 0.1mm; Pipe length deviation ± 10mm; The linearity of tubing detects by clearance gauge method on standard platform, and deviation is less than 0.8/2000mm; Internal surface of pipe is smooth, and the scuffing that outer surface vertical, horizontal allows is no more than 0.02mm, and the method is specific as follows:
(1) core processing dimension and installation accuracy: the dimensioned precision of core and installation accuracy directly affect the dimensional accuracy of spinning tubing, as core bend, the factor such as large of beating, during rotary pressure deformation, the deflection of diverse location is uneven, make tubing be difficult to be close on core in spinning process, cause finished product tubing dimensional discrepancy large; This method strictly controls the circularity of core, linearity and installation accuracy: core roundness deviation is not higher than ± 0.015mm, and core linearity deviation is not higher than ± 0.02mm; Core is installed and is beated precision not higher than ± 0.03mm, and this method precision of beating adopts dial gauge to measure;
(2) appropriate design stepped roller structure: spinning roller shoulder height 4.6mm, operating angle 25 °, receding angle 12 °, radius of corner r=8mm;
(3) spinning blank wall thickness dimension deviation: constancy of volume principle followed by blank in spinning process, if wall thickness deviation is comparatively large, then extends longer along its length in the side that wall thickness is thicker, cause bending pipes, through multiple batches of experimental study, blank wall thickness deviation can not higher than ± 0.03mm;
(4) temperature in strict controlling distortion district: aluminium alloy is in spinning process, blank and spinning roller, friction between blank and core can produce a large amount of heat, aluminium alloy also can produce deformation heat when being out of shape, thus cause rotary pressure deformation district temperature to raise, the aluminum alloy heat coefficient of expansion is large, cause deformed area blank thermal expansion larger, spinning roller and core gap constant, practical distortion amount is greater than nominal deflection, thus cause tubing expanding, not easily paste mould, because tubing does not paste mould, pipe material inner wall and core have certain gap, when carrying out lower a time spinning, size of pipe and tubing is wayward, cause finished size precision overproof, this method is by cooling, controlling distortion district temperature is less than 100 DEG C,
(5) on the basis controlling above-mentioned factor, multi-pass spinning technique is carried out:
The wall thickness of described tubing is 2 ± 0.1mm, and this tubing multi-pass spinning technique is preferably:
Beneficial effect of the present invention is: adopt the machining large-sized thin-wall aluminum alloy tubing of the method for the invention, precision significantly improves, and overcomes the bending pipes easily occurred in conventional spun process, the problem that linearity is overproof.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be further described.It is emphasized that following explanation is only exemplary, instead of in order to limit the scope of the invention and apply.
The dimensional requirement of high-accuracy large-scale thin-wall aluminum alloy tubing in the present embodiment: external diameter 85 ~ 200 ± 0.2mm, wall thickness 2 ± 0.1mm, length 2000 ± 5mm, the linearity of tubing detects by clearance gauge method on standard platform, deviation is less than 0.8/2000mm, internal surface of pipe is smooth, and the scuffing that outer surface vertical, horizontal allows is no more than 0.02mm, and outer surface allows slight spinning line.
Embodiment 1: produce the thin-wall aluminum alloy tubing that external diameter is 85 ± 0.2mm
(1) core processing dimension and installation accuracy: core outside dimension 81 ± 0.015mm, length 2100mm, core linearity deviation ± 0.02mm, core installs the precision ± 0.03mm that beats;
(2) stepped roller structure: spinning roller shoulder height 4.6mm, operating angle 25 °, receding angle 12 °, radius of corner r=8mm;
(3) spinning billet size: internal diameter 81.1 ± 0.02mm, wall thickness 11 ± 0.03mm, length 480mm;
(4) adopt cooling water to cool in spinning process, controlling distortion district temperature is less than 100 DEG C;
(5) on the basis controlling above-mentioned factor, multi-pass spinning technique as shown in table 1 is carried out.
Embodiment 2: produce the thin-wall aluminum alloy tubing that external diameter is 120 ± 0.2mm
(1) core processing dimension and installation accuracy: core outside dimension 116 ± 0.015mm, length 2100mm, core linearity deviation ± 0.02mm, core installs the precision ± 0.03mm that beats;
(2) stepped roller structure: spinning roller shoulder height 4.6mm, operating angle 25 °, receding angle 12 °, radius of corner r=8mm;
(3) spinning billet size: internal diameter 116.1 ± 0.02mm, wall thickness 11 ± 0.03mm, length 480mm;
(4) adopt cooling water to cool in spinning process, controlling distortion district temperature is less than 100 DEG C;
(5) on the basis controlling above-mentioned factor, multi-pass spinning technique as shown in table 1 is carried out.
Embodiment 3: produce the thin-wall aluminum alloy tubing that external diameter is 200 ± 0.2mm
(1) core processing dimension and installation accuracy: core outside dimension 196 ± 0.015mm, length 2100mm, core linearity deviation ± 0.02mm, core installs the precision ± 0.03mm that beats;
(2) stepped roller structure: spinning roller shoulder height 4.6mm, operating angle 25 °, receding angle 12 °, radius of corner r=8mm;
(3) spinning billet size: internal diameter 196.1 ± 0.02mm, wall thickness 11 ± 0.03mm, length 480mm;
(4) adopt cooling water to cool in spinning process, controlling distortion district temperature is less than 100 DEG C;
(5) on the basis controlling above-mentioned factor, multi-pass spinning technique as shown in table 1 is carried out.
Table 1
From the thin-wall aluminum alloy tubing of external diameter 85mm, 120mm, 200mm tri-kinds of specifications of producing, randomly draw 10 samples in every 1 ton of product, result is as shown in table 2:
Table 2
Claims (2)
1. a high-accuracy large-scale thin-wall aluminum alloy tubing spin-on process, described tubing permission machining deviation is: outside dimension deviation ± 0.2mm, wall thickness tolerance ± 0.1mm; Pipe length deviation ± 10mm; The linearity of tubing detects by clearance gauge method on standard platform, and deviation is less than 0.8/2000mm; Internal surface of pipe is smooth, and the scuffing that outer surface vertical, horizontal allows is no more than 0.02mm, and it is characterized in that, the method is specific as follows:
(1) core processing dimension and installation accuracy: roundness deviation is not higher than ± 0.015mm, and core linearity deviation is not higher than ± 0.02mm, and core is installed and beated precision not higher than ± 0.03mm;
(2) stepped roller structure: spinning roller shoulder height 4.6mm, operating angle 25 °, receding angle 12 °, radius of corner r=8mm;
(3) spinning blank wall thickness dimension deviation is not higher than ± 0.03mm;
(4) cool in spinning process, controlling distortion district temperature is less than 100 DEG C;
(5) on the basis controlling above-mentioned factor, multi-pass spinning technique is carried out:
2. a kind of high-accuracy large-scale thin-wall aluminum alloy tubing spin-on process according to claim 1, it is characterized in that, the wall thickness of described tubing is 2 ± 0.1mm, and this tubing multi-pass spinning technique is:
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510831624.2A CN105363869B (en) | 2015-11-25 | 2015-11-25 | A kind of high-accuracy large-scale thin-wall aluminum alloy tubing spin-on process |
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| CN201510831624.2A CN105363869B (en) | 2015-11-25 | 2015-11-25 | A kind of high-accuracy large-scale thin-wall aluminum alloy tubing spin-on process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238549A (en) * | 2016-08-29 | 2016-12-21 | 中航动力股份有限公司 | The surface of revolution part spin-on process on limit is installed before and after a kind of band |
| CN106584035A (en) * | 2016-12-26 | 2017-04-26 | 北京有色金属研究总院 | Preparation method of ultra-wide aluminum alloy sheet for formation of large curved component |
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| JP2004167587A (en) * | 2002-11-22 | 2004-06-17 | Sumitomo Metal Ind Ltd | Method for manufacturing uneven thickness metallic tube and die for working the same |
| CN101862798A (en) * | 2010-03-15 | 2010-10-20 | 晋西工业集团有限责任公司 | Method for composite forming of jar mouth type large-caliber thin-wall pipe |
| CN102773303A (en) * | 2012-07-16 | 2012-11-14 | 中国船舶重工集团公司第七二五研究所 | Copper nickel alloy large-size thick-wall seamless pipe manufacturing process |
| CN104028607A (en) * | 2014-06-06 | 2014-09-10 | 中国航天科技集团公司长征机械厂 | Machining method for improving finish product quality of spinning thickness-reduced pipe |
| CN104858285A (en) * | 2015-05-15 | 2015-08-26 | 航天特种材料及工艺技术研究所 | Spinning method |
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2015
- 2015-11-25 CN CN201510831624.2A patent/CN105363869B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004167587A (en) * | 2002-11-22 | 2004-06-17 | Sumitomo Metal Ind Ltd | Method for manufacturing uneven thickness metallic tube and die for working the same |
| CN101862798A (en) * | 2010-03-15 | 2010-10-20 | 晋西工业集团有限责任公司 | Method for composite forming of jar mouth type large-caliber thin-wall pipe |
| CN102773303A (en) * | 2012-07-16 | 2012-11-14 | 中国船舶重工集团公司第七二五研究所 | Copper nickel alloy large-size thick-wall seamless pipe manufacturing process |
| CN104028607A (en) * | 2014-06-06 | 2014-09-10 | 中国航天科技集团公司长征机械厂 | Machining method for improving finish product quality of spinning thickness-reduced pipe |
| CN104858285A (en) * | 2015-05-15 | 2015-08-26 | 航天特种材料及工艺技术研究所 | Spinning method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238549A (en) * | 2016-08-29 | 2016-12-21 | 中航动力股份有限公司 | The surface of revolution part spin-on process on limit is installed before and after a kind of band |
| CN106238549B (en) * | 2016-08-29 | 2018-08-03 | 中航动力股份有限公司 | A kind of surface of revolution part spin-on process on the front and back installation side of band |
| CN106584035A (en) * | 2016-12-26 | 2017-04-26 | 北京有色金属研究总院 | Preparation method of ultra-wide aluminum alloy sheet for formation of large curved component |
| CN106584035B (en) * | 2016-12-26 | 2018-06-15 | 北京有色金属研究总院 | A kind of large-scale curved component forming ultra-wide aluminium alloy sheet preparation method |
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