CN102240708B - Method for bending aluminium alloy pipe - Google Patents
Method for bending aluminium alloy pipe Download PDFInfo
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- CN102240708B CN102240708B CN 201110135509 CN201110135509A CN102240708B CN 102240708 B CN102240708 B CN 102240708B CN 201110135509 CN201110135509 CN 201110135509 CN 201110135509 A CN201110135509 A CN 201110135509A CN 102240708 B CN102240708 B CN 102240708B
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- 238000005452 bending Methods 0.000 title claims abstract description 83
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003825 pressing Methods 0.000 claims description 13
- 230000006378 damage Effects 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 4
- 238000003672 processing method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000000451 tissue damage Effects 0.000 description 2
- 231100000827 tissue damage Toxicity 0.000 description 2
- 206010061245 Internal injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The invention provides a method for bending an aluminium alloy pipe, for improving bending processing quality and processing precision. The aluminium alloy pipe is bended and formed in three steps. The method comprises the following steps: step 1, an upper mould of a bending mould descends at the pressure of 180-200 Mpa and at the speed of 16-18 mm/s and stops descending at a position 8-10 mm far away from a bottom dead centre, the upper mould stays and keeps pressure for 2.5-5s; step 2, the upper mould of the bending mould continuously descends at the pressure of 180-200 Mpa and at the speed of 16-18 mm/s and stops descending at a position 3-5 mm far away from the bottom dead centre, the upper mould stays and keeps pressure for 2.5-5s; and step 3, the upper mould of the bending mould continuously descends at the pressure of 180-200 Mpa and at the speed of 16-18 mm/s and stops descending at the bottom dead centre; the lower mould stays and keeps pressure for 2.5-5s to finish bending. By changing the traditional bending process, the aluminium alloy pipe is bent three times; the bending precision is effectively controlled; the forming quality is improved; and the phenomenon of crack and potential structural damage, which is easily generated by bending once, can be avoided.
Description
Technical field
The present invention relates to the aluminium alloy manufacture field, more particularly, relate to a kind of pressing bend method of aluminium-alloy pipe.
Background technology
The press-bending processing of tubing at industrial departments such as metal structure, agriculture and animal husbandry machinery, engineering machinery, dynamic power machine and petrochemical industry, light industry, Aero-Space, all occupies very consequence.And in the high-speed electric railway industry, also widely apply the tubing bending process.High-speed electric railway is with respect to general railway, its speed has promoted several times, because the characteristics such as its speed is fast, security is high, therefore the press-bending crudy for used tubing also has high requirement: comprise required precision that tubing bends and relative bending radius, relative thickness, select suitable press-bending processing method etc.
Aluminium-alloy pipe adds man-hour bending, because the dislocation deformation force between tissue surpasses the local tensile strength of material, or the deformation range of material surpasses the natural percentage elongation of material, and deformation can occur.Tensile strength and percentage elongation are the concepts of a pair of each other contradiction in the mechanics of materials, seek equalization point between, and it is very important selecting suitable press-bending processing method.
Existing aluminium-alloy pipe bending process is to adopt one-time formed press-bending processing method substantially, the method can cause crooked precision to be difficult to control, so that forming quality is unstable, even also can cause the local deformation amount too large, easily crack and potential tissue damage.Therefore, be badly in need of a kind of effective press-bending processing method, to improve quality and the stability in use of the aluminium-alloy pipe after processing.
Summary of the invention
The object of the invention is to overcome shortcoming of the prior art with not enough, a kind of aluminium-alloy pipe pressing bend method that improves press-bending crudy and machining accuracy is provided.
Purpose of the present invention is achieved by following technical proposals: a kind of pressing bend method of aluminium-alloy pipe is characterized in that: aluminium-alloy pipe divides three step bent into shape.
More particularly, aluminium-alloy pipe divides three step bent into shape, comprises the steps:
The first step, aluminium-alloy pipe is placed on the counterdie of bending die, aluminium-alloy pipe is carried out the first step to be bent: the patrix of bending die is descending with the speed of the pressure of 180-200Mpa, 16-18mm/s, stop to the position apart from bottom dead centre 8-10mm descending, stop pressurize 2.5-5s;
Second step, aluminium-alloy pipe is carried out second step bend: the patrix of bending die continues descending with the speed of the pressure of 180-200Mpa, 16-18mm/s, descending to stopping apart from bottom dead centre 3-5mm position, stop pressurize 2.5-5s;
In the 3rd step, aluminium-alloy pipe was carried out for the 3rd step bend: the patrix of bending die continues descending with the speed of the pressure of 180-200Mpa, 16-18mm/s, then stops descendingly to bottom dead centre, and stop pressurize 2.5-5s finishes press-bending;
Described bottom dead centre refers to the minimum point of the patrix needs arrival that requirement is designed according to finished form.
The pressure that described each step bend to adopt is consistent, and downstream rate of each step press-bending patrix is identical, cracks probability with internal injury to reduce aluminium-alloy pipe.
The case hardness of described aluminium-alloy pipe is 10Hw-12Hw.
Described bending die refers to the bending die that hydraulic tensioner carries.
Described three steps bend and are realized by Programmable Logic Controller PLC control.PLC is a kind of computer that is exclusively used in Industry Control, has a cost low, the characteristics such as transmission speed is fast.
Be provided with rubber cushion between the counterdie of described aluminium-alloy pipe and bending die; Described rubber cushion refers to the PVC rubber cushion that 1.5-2mm is thick, and this is preferred version.Mainly be in order to prevent that the phenomenons such as damage, impression appear in the aluminium-alloy pipe surface in the press-bending process.
Compared with prior art, the present invention has following advantage and beneficial effect: pressing bend method of the present invention is by changing traditional press-bending processing technology, aluminium-alloy pipe is carried out three times to be bent, effectively control crooked precision, the quality that improve to be shaped, and can avoid once bending and easily crack phenomenon with potential tissue damage.
Description of drawings
Fig. 1 is the work schematic diagram of aluminium-alloy pipe pressing bend method of the present invention.
The specific embodiment
The present invention is described in further detail below in conjunction with drawings and Examples, but embodiments of the present invention are not limited to this.
Embodiment one
Below take case hardness as 10Hw, model is that the aluminium-alloy pipe 2 of 6082 (being that cross-sectional dimensions is high 40mm * wide 20mm * wall thickness 3mm) describes for example.The hydraulic tensioner that adopts among the embodiment is that connection hydraulic machinery Co., Ltd produces in the Foshan City, and model is the four post double-action drawing machines of Y28-120.
After aluminium-alloy pipe 2 fixed length sawings, use hydraulic tensioner to carry out the processing of bending for three times.
The first step is placed on aluminium-alloy pipe 2 on the counterdie 3 of bending die, aluminium-alloy pipe 2 is carried out the first step bend: the patrix 1 of bending die is descending with the speed of the pressure of 180Mpa, 16mm/s, stop to the position apart from bottom dead centre 8mm descending, stop pressurize 4s;
Second step, aluminium-alloy pipe 2 is carried out second step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 180Mpa, 16mm/s, descending to stopping apart from bottom dead centre 3mm position, stop pressurize 2.5s;
In the 3rd step, aluminium-alloy pipe 2 was carried out for the 3rd step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 180Mpa, 16mm/s, then stops descendingly to bottom dead centre, and stop pressurize 5s finishes press-bending.
Described bottom dead centre refers to the minimum point of the patrix needs arrival that requirement is designed according to finished form.
Embodiment two
Below take case hardness as 10.6Hw, model is that the aluminium-alloy pipe 2 of 6082 (being that cross-sectional dimensions is high 40mm * wide 20mm * wall thickness 3mm) describes for example.The hydraulic tensioner that adopts among the embodiment is that connection hydraulic machinery Co., Ltd produces in the Foshan City, and model is the four post double-action drawing machines of Y28-120.
After aluminium-alloy pipe 2 fixed length sawings, use hydraulic tensioner to carry out the processing of bending for three times.
The first step, aluminium-alloy pipe 2 is placed on the counterdie 3 of bending die, aluminium-alloy pipe 2 is carried out the first step to be bent: the patrix 1 of bending die is descending with the speed of the pressure of 180Mpa, 16.8mm/s, stop to the position apart from bottom dead centre 8mm descending, stop pressurize 4s;
Second step, aluminium-alloy pipe 2 is carried out second step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 180Mpa, 16.8mm/s, descending to stopping apart from bottom dead centre 3.5mm position, stop pressurize 4s;
In the 3rd step, aluminium-alloy pipe 2 was carried out for the 3rd step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 180Mpa, 16.8mm/s, then stops descendingly to bottom dead centre, and stop pressurize 5s finishes press-bending.
Described bottom dead centre refers to the minimum point of the patrix needs arrival that requirement is designed according to finished form.
Embodiment three
Below take case hardness as 11.2Hw, model is that the aluminium-alloy pipe 2 of 6082 (being that cross-sectional dimensions is high 40mm * wide 20mm * wall thickness 3mm) describes for example.The hydraulic tensioner that adopts among the embodiment is that connection hydraulic machinery Co., Ltd produces in the Foshan City, and model is the four post double-action drawing machines of Y28-120.
The first step, aluminium-alloy pipe 2 is placed on the counterdie 3 of bending die, aluminium-alloy pipe 2 is carried out the first step to be bent: the patrix 1 of bending die is descending with the speed of the pressure of 185Mpa, 17.3mm/s, stop to the position apart from bottom dead centre 9mm descending, stop pressurize 3.5s;
Second step, aluminium-alloy pipe 2 is carried out second step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 185Mpa, 17.3mm/s, descending to stopping apart from bottom dead centre 4mm position, stop pressurize 2.5s;
In the 3rd step, aluminium-alloy pipe 2 was carried out for the 3rd step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 185Mpa, 17.3mm/s, then stops descendingly to bottom dead centre, and stop pressurize 4s finishes press-bending.
Described bottom dead centre refers to the minimum point of the patrix needs arrival that requirement is designed according to finished form.
Embodiment four
Below take case hardness as 11.8Hw, model is that the aluminium-alloy pipe 2 of 6082 (being that cross-sectional dimensions is high 40mm * wide 20mm * wall thickness 3mm) describes for example.The hydraulic tensioner that adopts among the embodiment is that connection hydraulic machinery Co., Ltd produces in the Foshan City, and model is the four post double-action drawing machines of Y28-120.
After aluminium-alloy pipe 2 fixed length sawings, use hydraulic tensioner to carry out the processing of bending for three times.
The first step, aluminium-alloy pipe 2 is placed on the counterdie 3 of bending die, aluminium-alloy pipe 2 is carried out the first step to be bent: the patrix 1 of bending die is descending with the speed of the pressure of 190Mpa, 18mm/s, stop to the position apart from bottom dead centre 9.5mm descending, stop pressurize 4.5s;
Second step, aluminium-alloy pipe 2 is carried out second step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 190Mpa, 18mm/s, descending to stopping apart from bottom dead centre 4.5mm position, stop pressurize 2.5s;
In the 3rd step, aluminium-alloy pipe 2 was carried out for the 3rd step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 190Mpa, 18mm/s, then stops descendingly to bottom dead centre, and stop pressurize 3s finishes press-bending.
Described bottom dead centre refers to the minimum point of the patrix needs arrival that requirement is designed according to finished form.
Embodiment five
Below take case hardness as 12Hw, model is that the aluminium-alloy pipe 2 of 6082 (being that cross-sectional dimensions is high 40mm * wide 20mm * wall thickness 3mm) describes for example.The hydraulic tensioner that adopts among the embodiment is that connection hydraulic machinery Co., Ltd produces in the Foshan City, and model is the four post double-action drawing machines of Y28-120.
After aluminium-alloy pipe 2 fixed length sawings, use hydraulic tensioner to carry out the processing of bending for three times.
The first step, aluminium-alloy pipe 2 is placed on the counterdie 3 of bending die, aluminium-alloy pipe 2 is carried out the first step to be bent: the patrix 1 of bending die is descending with the speed of the pressure of 200Mpa, 18mm/s, stop to the position apart from bottom dead centre 10mm descending, stop pressurize 5s;
Second step, aluminium-alloy pipe 2 is carried out second step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 200Mpa, 18mm/s, descending to stopping apart from bottom dead centre 5mm position, stop pressurize 2.5s;
In the 3rd step, aluminium-alloy pipe 2 was carried out for the 3rd step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 200Mpa, 18mm/s, then stops descendingly to bottom dead centre, and stop pressurize 3s finishes press-bending.
Described bottom dead centre refers to the minimum point of the patrix needs arrival that requirement is designed according to finished form.
Embodiment six
Below take case hardness as 11.8Hw, model is that the aluminium-alloy pipe 2 of 6082 (being that cross-sectional dimensions is high 40mm * wide 20mm * wall thickness 3mm) describes for example.The hydraulic tensioner that adopts among the embodiment is that river, Foshan City hydraulic machinery Co., Ltd of Weida produces, and model is the four post double-action drawing machines of Y28-120.
After aluminium-alloy pipe 2 fixed length sawings, use hydraulic tensioner to carry out the processing of bending for three times.
The first step, aluminium-alloy pipe 2 is placed on the counterdie 3 of bending die, aluminium-alloy pipe 2 is carried out the first step to be bent: the patrix 1 of bending die is descending with the speed of the pressure of 190Mpa, 18mm/s, stop to the position apart from bottom dead centre 9.5mm descending, stop pressurize 4.5s;
Second step, aluminium-alloy pipe 2 is carried out second step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 190Mpa, 18mm/s, descending to stopping apart from bottom dead centre 4.5mm position, stop pressurize 2.5s;
In the 3rd step, aluminium-alloy pipe 2 was carried out for the 3rd step bend: the patrix 1 of bending die continues descending with the speed of the pressure of 190Mpa, 18mm/s, then stops descendingly to bottom dead centre, and stop pressurize 3s finishes press-bending.
Described bottom dead centre refers to the minimum point of the patrix needs arrival that requirement is designed according to finished form.
Among above six embodiment three step bends and realizes by Programmable Logic Controller PLC control, and bottom dead centre calculates rear input PLC according to trigonometric function, stops after being touched the bottom by PLC control patrix.The pressure that described each step press-bending is adopted is consistent, and downstream rate of each step press-bending patrix is identical.Described bending die refers to the bending die that hydraulic tensioner carries.Be provided with rubber cushion between the counterdie 3 of described aluminium-alloy pipe and bending die; Described rubber cushion refers to the PVC rubber cushion that 1.5-2mm is thick, mainly is in order to prevent that the phenomenons such as damage, impression appear in aluminium-alloy pipe 2 surfaces in the press-bending process.
Above-described embodiment is the better embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (7)
1. the pressing bend method of an aluminium-alloy pipe is characterized in that: aluminium-alloy pipe divides three step bent into shape; Comprise the steps:
The first step, aluminium-alloy pipe is placed on the counterdie of bending die, aluminium-alloy pipe is carried out the first step to be bent: the patrix of bending die is descending with the speed of the pressure of 180-200Mpa, 16-18mm/s, stop to the position apart from bottom dead centre 8-10mm descending, stop pressurize 2.5-5s;
Second step, aluminium-alloy pipe is carried out second step bend: the patrix of bending die continues descending with the speed of the pressure of 180-200Mpa, 16-18mm/s, descending to stopping apart from bottom dead centre 3-5mm position, stop pressurize 2.5-5s;
In the 3rd step, aluminium-alloy pipe was carried out for the 3rd step bend: the patrix of bending die continues descending with the speed of the pressure of 180-200Mpa, 16-18mm/s, then stops descendingly to bottom dead centre, and stop pressurize 2.5-5s finishes press-bending;
Described bottom dead centre refers to the minimum point of the patrix needs arrival that requirement is designed according to finished form.
2. the pressing bend method of aluminium-alloy pipe according to claim 1 is characterized in that: the pressure that adopts that bends of described each step is consistent, and downstream rate of each step press-bending patrix is identical.
3. the pressing bend method of aluminium-alloy pipe according to claim 1, it is characterized in that: the case hardness of described aluminium-alloy pipe is 10Hw-12Hw.
4. the pressing bend method of aluminium-alloy pipe according to claim 1, it is characterized in that: described bending die refers to the bending die that hydraulic tensioner carries.
5. aluminium-alloy pipe pressing bend method according to claim 1 is characterized in that: described three steps bend and are realized by Programmable Logic Controller PLC control.
6. the pressing bend method of aluminium-alloy pipe according to claim 1 is characterized in that: be provided with rubber cushion between the counterdie of described aluminium-alloy pipe and bending die.
7. aluminium-alloy pipe pressing bend method according to claim 6, it is characterized in that: described rubber cushion refers to the PVC rubber cushion that 1.5-2mm is thick.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110135509 CN102240708B (en) | 2011-05-24 | 2011-05-24 | Method for bending aluminium alloy pipe |
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| CN 201110135509 CN102240708B (en) | 2011-05-24 | 2011-05-24 | Method for bending aluminium alloy pipe |
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| CN102240708B true CN102240708B (en) | 2013-04-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106583514B (en) * | 2016-12-15 | 2019-06-11 | 中车长春轨道客车股份有限公司 | Using rail vehicle hollow aluminium alloy profile bending die to the bending process of profile |
| CN107138568A (en) * | 2017-06-10 | 2017-09-08 | 宁波鸿达电机模具有限公司 | Steel pipe bending method and its fixture |
| CN110102615B (en) * | 2019-04-17 | 2020-10-02 | 郑州明泰交通新材料有限公司 | Method for bending T6 state 6005A aluminum alloy section in variable radius mode |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS524460A (en) * | 1975-06-30 | 1977-01-13 | Mitsubishi Heavy Ind Ltd | Method of bending metal material with die |
| JP2003039117A (en) * | 2001-07-26 | 2003-02-12 | Toyota Motor Corp | Tension bending method and apparatus therefor |
| JP5286506B2 (en) * | 2007-06-06 | 2013-09-11 | Ｊｆｅスチール株式会社 | Pipe bending machine |
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Non-Patent Citations (3)
| Title |
|---|
| JP特开2003-039117A 2003.02.12 |
| JP特开2008-302380A 2008.12.18 |
| JP特开昭52-004460A 1977.01.13 |
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Address after: 528131, No. two East Ring Road, Chen Long Long Industrial Zone, Foshan, Guangdong, Shunde Patentee after: FOSHAN HONGJINYUAN PRECISION MANUFACTURING CO.,LTD. Address before: 528131, No. two East Ring Road, Chen Long Long Industrial Zone, Foshan, Guangdong, Shunde Patentee before: Foshan Golden Source Aluminium Products Co.,Ltd. |
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Denomination of invention: A bending method of aluminum alloy tube Effective date of registration: 20200911 Granted publication date: 20130424 Pledgee: Agricultural Bank of China Limited Shunde Chencun sub branch Pledgor: FOSHAN HONGJINYUAN PRECISION MANUFACTURING Co.,Ltd. Registration number: Y2020980005997 |
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Denomination of invention: A bending method for aluminum alloy pipes Effective date of registration: 20230926 Granted publication date: 20130424 Pledgee: Agricultural Bank of China Limited Shunde Chencun sub branch Pledgor: FOSHAN HONGJINYUAN PRECISION MANUFACTURING CO.,LTD. Registration number: Y2023980058848 |
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