CN105414276A - Machining method of large-caliber thin-walled air supply aluminum bent pipe - Google Patents
Machining method of large-caliber thin-walled air supply aluminum bent pipe Download PDFInfo
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- CN105414276A CN105414276A CN201510843059.1A CN201510843059A CN105414276A CN 105414276 A CN105414276 A CN 105414276A CN 201510843059 A CN201510843059 A CN 201510843059A CN 105414276 A CN105414276 A CN 105414276A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D9/00—Bending tubes using mandrels or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D21/00—Combined processes according to methods covered by groups B21D1/00 - B21D19/00
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- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention belongs to the technical field of metal pipe bending, and relates to a machining method of a high-precision and high-strength large-caliber thin-walled air supply aluminum bent pipe. The problem that a large-caliber thin-walled air supply aluminum bent pipe high in size precision, strength and yield strength cannot be produced out through existing equipment and methods is mainly solved. The machining method is mainly characterized by comprising the steps that 1, an untreated f-state blank pipe is selected; 2, the oval and surface of the blank pipe are shaped through a sphere passing diameter shaping process; 3, the shaped blank pipe is bent through an improved hydraulic pipe bending machine; 4, the thin-walled bent pipe formed through machining is subjected to pressure maintaining and then is discharged from the machine; 5, the bent pipe discharged from the machine is aged to improve strength; and 6, factory detection is carried out through detection equipment, and it is guaranteed that the angle, ovality, torsion resistance, hardness, streamline and the like meet design requirements. The machining method is mainly used for machining the high-precision and high-strength large-caliber thin-walled air supply aluminum bent pipe.
Description
Technical field
The invention belongs to metal tube bending techniques field, be specifically related to the processing method of a kind of high accuracy for air-transport system, high strength, heavy caliber book wall pneumatic transmission aluminium bend pipe.
Background technology
China's present stage aluminium forming elbow method: generally all first will carry out annealing in process to eliminate stress to base material, aluminum pipe carries out Bending Processing under soft state.With this processes bend pipe out, because material is soft, the problem brought is exactly that anti-yield strength is extremely low.And for pneumatic transmission pipeline, general heavy caliber book wall (Φ 150 ㎜, the wall thickness 2 ㎜) bend pipe that adopts, just more can in links such as transport, handling, assembled in situ, collide with because being subject to external force and causing port distortion or tube wall uneven.If port position or be subject to is collided with, position ellipse changes, can the fluency of transporting articles in straight shadow pipe; If angle of bend changes, the overall look and feel effect after conveyance conduit arrangement more can be affected.
Can find out in sum, for the heavy caliber book wall aluminium bend pipe of pneumatic transmission system, only have the dimensional tolerance precision of bend pipe angle and ellipse high, tube wall does not have gauffer and bump injury, the smooth and airtight gap, interface position of guarantee pipeline streamline; Also require that pipeline possesses certain anti-yield strength simultaneously, guarantee at dress, join each link, can not change in size be caused because colliding with extruding or occur tube wall hollow.For the large-caliber thin-walled aluminium bend pipe being used as Φ 150 ㎜ of pneumatic transmission system, wall thickness 2 ㎜, R1200mm, angle of bend 90 degree, according to traditional processing method, be difficult to the guarantee high accuracy of size and the high strength of anti-surrender.
Summary of the invention
Object of the present invention is exactly shortcoming for existing in background technology and problem, improved, innovated, appropriate reconstruction is carried out to the pure pull-type bending machine of tradition, emphasis is innovated at forming method and process aspect, guarantee that Φ 150 ㎜, the ellipse of the large-caliber thin-walled aluminium bend pipe of wall thickness 2 ㎜ clod wash, distortion, angle, tube wall streamline meet designing requirement, the processing method of a kind of high accuracy, high strength, heavy caliber book wall pneumatic transmission aluminium bend pipe is provided.
Technical solution of the present invention is: a kind of processing method of heavy caliber book wall pneumatic transmission aluminium bend pipe, for processing the pneumatic transmission aluminium bend pipe processing of Φ 150 ㎜, wall thickness 2 ㎜, long 3000 ㎜, it is characterized in that comprising following processing step:
(1) selection, selects the 6063f natural mode blank aluminum pipe without artificial aging and annealing in process;
(2) whole footpath, adopted ball whole footpath technique to carry out integer to the ellipse of blank aluminum pipe and surface, and crossing ball speed is 3 meters/15-30 second;
(3) bending machine is shaped, and the blank aluminum pipe after integer is served bending machine; Mandrel is inserted in front end, and mandrel body and core ball are inserted in rear end, start forward and backward clamping device and are clamped at the two ends of blank aluminum pipe; Front end, rear end clamping pressure are 3.5 ~ 4.7MPa; Start the machine after bending machine control flow arranges corresponding bend pipe angle and bending duration, blank aluminum pipe rotates winding shaping with bending machine circle mould;
(4) descend pressurize before machine, under shaping bend pipe before machine, first carry out the pressurize of 0 ~ 4 minute according to blank pipe hardness and angle of bend situation, after extract mandrel body and core ball out according to first loose rear fixture, the step that rear loose front clamp device extracts mandrel out takes off bend pipe;
(5) dimension correction, adopted ball whole footpath technique to carry out dimension correction to the bend pipe after pressurize process, and adjustment makes angle, ellipse, torsion resistance all meet designing requirement; Crossing ball speed is 3 meters/10 ~ 40 seconds, realizes the high accuracy of bend pipe;
(6) timeliness increases tube wall hardness, timeliness is carried out to the bend pipe after dimension correction, for increasing body hardness, improve anti-yield strength, the T5 state making bend pipe meet GB/5237-2008 to specify, tensile strength >=160/Mpa, yield strength >=110/Mpa, webster hardness >=9HW, realizes the high strength of bend pipe.
6063 natural mode blank aluminum pipes in processing step described in technical solution of the present invention (1) are 6063f natural mode blank aluminum pipe, are of a size of Φ 150(+0.3-0.4) ㎜, wall thickness 2(+-0.16) ㎜, long 3000(+-5) ㎜; The residual aluminium bits of tube wall and particle is removed with the polishing of foam sand; Impurity in removing pipe, then lubricating oil spraying in pipe.
Processing step described in technical solution of the present invention (2) and (5) in, cross ball sphere diameter and be greater than blank aluminum pipe internal diameter 0.1 ~ 0.3 ㎜, cross ball number of times 1-3 time, oval allowance control is within+0.3-0.4mm.
Processing step described in technical solution of the present invention (3) in angle of bend be 88-93 degree, bending speed is 3 meters/20-35 second.
Processing step described in technical solution of the present invention (6) in aging temp selected by timeliness be 200-230 degree, temperature retention time is 120-240 minute, to reach dimensionally stable and anti-yield strength rises to object.
The present invention for angle pipe equipment, makes corresponding ball integer type device and detection platform excessively with existing wound form hydraulic pipe bender by oneself.Select the nature blank pipe without artificial aging and annealing, through conscientious size detection and surface treatment before upper bending machine, guarantee that blank pipe size enters difference, tube wall, without hollow and the scuffing of colliding with, keeps the cold stewing of machine on original stress.Afterwards by pressurize, repeatedly cross ball and shaping after the operation such as timeliness again, not only stable for the precision of bent pipe ruler cun, and improve anti-yield strength.Make aluminum Pneumatic conveying pipeline and other metal material pipeline comparative advantages more obvious.Cost performance cost with high investment is low, monomer weight gently facilitates assembled in situ and carrying, anti-yield strength highly avoid the bump injury of shipment, the precision of size ensure that the smooth effect of pneumatic transmission object.
The present invention has following beneficial effect:
(1) processing charges is low.Process the bend pipe of Φ 150 × 2 ㎜ 90 degree of R1200 by the inventive method, need artificial 3,5 minutes consuming time, use power 11kw, the bend pipe processing same specification by conventional method needs artificial 6,300 minutes time, uses power 270kw.
(2) body is not damaged.Adopt cold roasting method can not cause damage to body by Yin Gaowen, after outer list processing, lose aberration, sensorial effects is good; And traditional diamond-making technique can make bend pipe surface produce oxidation through high-temperature heating, damage is caused to body.And hot bending is more thinning than clod wash lateral wall also large, clod wash lateral wall thinning only 5%.
(3) dimensional accuracy is high.Bend pipe ovality rate and angular deviation are up to 98%; Really accomplish that size is accurate, be only 0.15mm with the fit clearance of sleeve pipe, in article transmitting procedure, substantially can not produce obstruct.And the precision of forming dimension and angle cannot be ensured by conventional method at all.
(4) anti-surrender is high-strength.Overcome the defect that the soft fearness of aluminum pneumatic transmission bend pipe material is collided with.Conventional method processing bend pipe first to anneal to blank pipe after bending.Because body is soft, in transport and assembling process, causing the risk of distortion of colliding with high, but adopt first be shaped after timeliness method after, increase body hardness, improve the anti-yield strength of pipeline, improve the stability of size simultaneously.
(5) comprehensive benefit is good.Aluminium alloy is higher than other metal material cost performances, and bending and forming efficiency is high, the sensorial effects after installation, can be described as the good material of super quality and competitive price, thus relatively can reduce project cost, be easily widely applied.
The processing method of high accuracy of the present invention, high strength, heavy caliber book wall pneumatic transmission aluminium bend pipe, can the large-caliber thin-walled aluminum pipe of Φ 150 ㎜, wall thickness 2 ㎜, long 3000 ㎜ be bent shaping, and make inflection point and receive curved point not occur crackle or wrinkling, the ellipse of bend pipe, angle, torsion resistance, anti-yield strength all meet designing requirement.Instant invention overcomes the weak point of existing equipment and technology, transform the pure pull-type bending machine of tradition, emphasis is innovated in technique.Guarantee clod wash high accuracy, high strength, the margin of tolerance such as ellipse, distortion, angle that large-caliber thin-walled bend pipe can reach or meet layout design.The present invention is mainly used in the processing of the high accuracy of air-transport system, high strength, heavy caliber book wall pneumatic transmission aluminium bend pipe.
Detailed description of the invention
Below the processing method of high accuracy of the present invention, high strength, large-caliber thin-walled pneumatic transmission aluminium bend pipe is described in further detail.
The processing method of heavy caliber book wall pneumatic transmission aluminium bend pipe of the present invention comprises following processing step:
(1) blank is selected, select without 6063f state Φ 150 ㎜, wall thickness 2 ㎜ of artificial aging and annealing in process, long 3000 ㎜ aluminium-alloy pipes as turned blank aluminum pipe to be bent, and carry out size detection, meet the dimensional requirement of Φ 150 (+0.3-0.4) mm*2 (+-0.16) mm*3000 (+-5) mm;
(2) machine of going up prepares, and removes the residual aluminium bits of tube wall and particle with the polishing of foam sand; Impurity in removing pipe, then sprays moderate lubrication oil, makes it meet the requirement of machine bending in pipe;
(3) adopted ball whole footpath technique to carry out integer process to blank aluminum pipe, according to blank aluminum pipe hardness situation, cross ball speed and be chosen as 3 meters/15-30 second, sphere diameter is chosen as and is greater than blank aluminum pipe internal diameter 0.1-0.3mm, cross ball number of times 1-3 time, object guarantees that oval allowance control is within+0.3-0.4mm;
(4) bending and forming, selects wound form hydraulic pipe bender as angle pipe equipment, the blank pipe after shaping is carried on bending machine to be curved; First insert mandrel and core ball in rear end, insert mandrel in front end, two ends clamping device successively pressurization clamping blank aluminum pipe, pressure is respectively between 3.5 ~ 4.7MPa; On bending machine control flow, arrange the operation duration of angle of bend and bending again, according to blank pipe hardness situation, angle is arranged between 88-93 degree, bending duration is 3 meters/15-25 second; Finally start bending machine and carry out bending, elbow material is Wrapping formed along with the round mould rotation on bending machine;
(5) pressurize process, first carries out pressurize before machine under the bend pipe of machine-shaping, and the dwell time is 0-4 minute, then according to the first rear clamping of pine suitably, extract mandrel body and core ball out, the step that rear loose front clamp extracts front mandrel out takes off bend pipe, reaches and changes the object of finely tuning to the bounce-back of bend pipe angle;
(6) again correct, after bend pipe after lower machine is detected, ball whole footpath technique was according to circumstances again adopted to carry out correction process to size, crossing ball speeds control is between 3 meters/10 ~ 40 seconds, sphere diameter is chosen as and is greater than blank aluminum pipe internal diameter 0.1-0.3mm, cross ball number of times 1-3 time, for adjusting angle and ovality, until reach designing requirement;
(6) timeliness Hardening shaping, puts into aging furnace by bend pipe, heats to 200-230 degree, be incubated air cooling of coming out of the stove after 180-240 minute, the T5 state making bend pipe meet GB2/5237-2008 to specify, tensile strength >=160/MPa, yield strength >=110/MPa, webster hardness >=9HW, improve anti-yield strength.
(7) initial workpiece detects, and A: three coordinate angles detect; B: mechanical performance and yield strength test; C: detection platform coefficient of colligation detects; D: drift is tested;
(8) produce in batches, the basis that initial workpiece is completely qualified is produced in batches; Accomplish that each batch first will be made exemplar, through three coordinates inspection after equipment is adjusted, then formally produce, require angle of bend+-0.5 degree within; Detected by the glacing flatness of detection platform to bend pipe, require with in 2/1000 ㎜, torsion resistance list surveys within the ㎜ of gap 5, ellipticity is measured within 0,15,45,75,90 degree of five place A-B be less than or equal to 1.2 ㎜.Anti-yield strength is greater than tensile strength >=160/Mpa, yield strength >=110/Mpa, webster hardness >=9HW.
Claims (5)
1. a processing method for heavy caliber book wall pneumatic transmission aluminium bend pipe, for processing the pneumatic transmission aluminium bend pipe processing of Φ 150 ㎜, wall thickness 2 ㎜, long 3000 ㎜, is characterized in that comprising following processing step:
(1) selection, selects the 6063 natural mode blank aluminum pipes without artificial aging and annealing in process;
(2) whole footpath, adopted ball whole footpath technique to carry out integer to the ellipse of blank aluminum pipe and surface, and crossing ball speed is 3 meters/15-30 second;
(3) cold bending, serves bending machine by the blank aluminum pipe after integer; Mandrel is inserted in front end, and mandrel body and core ball are inserted in rear end, start forward and backward clamping device and are clamped at the two ends of blank aluminum pipe; Front end, rear end clamping pressure are 3.5 ~ 4.7MPa; Start the machine after bending machine control flow arranges corresponding bend pipe angle and bending duration, blank aluminum pipe rotates winding shaping with bending machine circle mould;
(4) descend pressurize before machine, under the bend pipe of shaping before machine, first carry out the pressurize of 0 ~ 4 minute according to blank pipe hardness and angle of bend situation, then extract mandrel body and core ball out according to first loose rear fixture, the step that rear loose front clamp device extracts mandrel out takes off bend pipe;
(5) dimension correction, adopted ball whole footpath technique to carry out dimension correction to the bend pipe after pressurize process, and adjustment makes angle, ellipse, torsion resistance, makes it all to meet designing requirement; Crossing ball speed is 3 meters/10 ~ 40 seconds;
(6) timeliness increases tube wall hardness, carries out Ageing Treatment, for increasing body hardness to the bend pipe of dimension correction, improve anti-yield strength, the T5 state making bend pipe meet GB/5237-2008 to specify, tensile strength >=160/Mpa, yield strength >=110/Mpa, webster hardness >=9HW.
2. the processing method of a kind of heavy caliber book wall pneumatic transmission aluminium bend pipe according to claim 1, it is characterized in that: the aluminum pipe in described processing step (1) is 6063f natural mode blank aluminum pipe, be of a size of Φ 150(+0.3-0.4) ㎜, wall thickness 2(+-0.16) ㎜, long 3000(+-5) ㎜; The residual aluminium bits of tube wall and particle is removed with the polishing of foam sand; Impurity in removing pipe, then lubricating oil spraying in pipe.
3. the processing method of a kind of heavy caliber book wall pneumatic transmission aluminium bend pipe according to claim 1 and 2, it is characterized in that: described processing step (2) and (5) in, cross ball sphere diameter and be greater than blank aluminum pipe internal diameter 0.1 ~ 0.3 ㎜, cross ball number of times 1-3 time, oval allowance control is within+0.3-0.4mm.
4. the processing method of a kind of heavy caliber book wall pneumatic transmission aluminium bend pipe according to claim 1 and 2, is characterized in that: described processing step (3) in angle of bend be 88-93 degree, bending speed is 3 meters/15-25 second.
5. the processing method of a kind of heavy caliber book wall pneumatic transmission aluminium bend pipe according to claim 1 and 2, is characterized in that: described processing step (6) middle aging temp selected by timeliness is 200-230 degree, and temperature retention time is 120-240 minute.
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| CN201510843059.1A CN105414276B (en) | 2015-11-27 | 2015-11-27 | The processing method of heavy caliber book wall pneumatic transmission aluminium bend pipe |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014385A (en) * | 2018-10-10 | 2020-04-17 | 江苏升创管业有限公司 | Manufacturing process of U-shaped aluminum pipe |
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2015
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| US4269054A (en) * | 1978-03-17 | 1981-05-26 | Eaton-Leonard Corporation | Bending method |
| JPS5639123A (en) * | 1979-09-05 | 1981-04-14 | Hitachi Ltd | Bending method for pipe utilizing ultrasonic wave |
| US4543809A (en) * | 1982-07-03 | 1985-10-01 | Lang Thomas P | Apparatus for bending thin-walled pipes |
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| CN102744304A (en) * | 2012-07-26 | 2012-10-24 | 襄阳市广谦达进出口有限公司 | Processing method of cavity cold-bending large-caliber thin-wall aluminum bent pipe |
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Cited By (1)
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| CN111014385A (en) * | 2018-10-10 | 2020-04-17 | 江苏升创管业有限公司 | Manufacturing process of U-shaped aluminum pipe |
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