CN103921068B - Single degree covering processing method - Google Patents

Single degree covering processing method Download PDF

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Publication number
CN103921068B
CN103921068B CN201410136878.8A CN201410136878A CN103921068B CN 103921068 B CN103921068 B CN 103921068B CN 201410136878 A CN201410136878 A CN 201410136878A CN 103921068 B CN103921068 B CN 103921068B
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China
Prior art keywords
covering
skin
milling
degree
roll bending
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Expired - Fee Related
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CN201410136878.8A
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Chinese (zh)
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CN103921068A (en
Inventor
崔修平
梁壮
吴杨
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AVIC Sac Commercial Aircraft Co Ltd
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AVIC Sac Commercial Aircraft Co Ltd
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Priority to CN201410136878.8A priority Critical patent/CN103921068B/en
Publication of CN103921068A publication Critical patent/CN103921068A/en
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Publication of CN103921068B publication Critical patent/CN103921068B/en
Expired - Fee Related legal-status Critical Current
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P15/00Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23PMETAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P2700/00Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
    • B23P2700/01Aircraft parts

Abstract

The present invention discloses a kind of single degree covering processing method, and the method comprises blanking, roll bending, and flatten, milling, the single degree three radian covering large for difficulty of processing and the thick covering of single degree also need to carry out secondary roll bending after milling is complete.No matter be for the simple single degree covering of processing, or the single covering of processed complex, all can adopt processing method of the present invention, making milling change machine milling completely into becomes possibility, go back bonding curvature covering working (machining) efficiency and machining accuracy simultaneously, effectively save processing cost.

Description

Single degree covering processing method
Technical field
The present invention relates to covering manufacture field, be specifically related to a kind of single degree covering processing method.
Background technology
Existing covering forming technology, the particularly manufacture of large-scale thin skin, traditional diamond-making technique carries out milling after roll bending, and chemistry milling method environmental pollution is serious, and processing cost is high and efficiency is lower, cannot meet existing batch of requirement of going into operation fast.And existing method of covering being carried out to machine milling after first roll bending, due in roll bending process, that selects rolls bed, during roll bending feeding number of times and the amount of feeding improper, cause skin part roll bending not in place, roll bending does not become required radian, cause and cannot carry out processing and cause covering to be scrapped, carrying out in milling process to the skin part of roll bending, part is caused to cross reasons such as cutting because skin part easily produces respective regions bulge phenomenon with stress, covering is caused to be scrapped, and skin part is in roll bending, machine milling, because method step is not right in the processes such as turnover, a large amount of scuffings is produced to skin part and causes part rejection, and single degree covering occupies 70% of covering total amount in large-scale aircarrier aircraft, in order to save processing cost, ensure covering machining accuracy and efficiency, research and develop a kind of system what be convenient to implement is those skilled in the art's technical problem urgently to be resolved hurrily and difficult point with the single degree covering processing method solved the problem.
Summary of the invention
Not enough for prior art, the present invention discloses a kind of single degree covering processing method, and the method comprises blanking, roll bending, and flatten, milling, the single degree three radian covering large for difficulty of processing and the thick covering of single degree also need to carry out secondary roll bending after milling is complete.No matter be for the simple single degree covering of processing, or the single degree covering of processed complex, all can adopt processing method of the present invention, making milling change machine milling completely into becomes possibility, go back bonding curvature covering working (machining) efficiency and machining accuracy simultaneously, effectively save processing cost.
For achieving the above object, the technical solution used in the present invention is:
Single degree covering processing method, comprises the following steps:
A blanking, by plate shearing by the measure having more cover edges 200-240mm on trigger, forms skin part; Find out the arcuate positions needing roll bending, rule with marking pen;
B roll bending, numerical control triaxial is selected to roll bed, roll bending is carried out after wiping roller bearing, skin part, make three roller bearings rolling bed drive rotation, upper roller bearing does rectilinear motion feeding, 4-6 feeding simultaneously, the amount of feeding is 0.2-2mm, the height dimension that numerical control controls upper roller bearing is higher than skin thickness 5-10mm, selects Non-follow control roller bearing rotation direction, detects the radian of skin part roll bending;
C flattens, manufacture the vacuum being applicable to skin part size and inhale card platform, clean skin part, vacuum inhales card platform, for clamping the fixture of skin part, after on skin part of slinging its edge is leaned against locating piece that vacuum inhales card platform, whereabouts skin part, push down covering with briquetting and tilt side, the manually bolt of this side fastening, do not tighten, the aluminium sheet hanging to be slightly less than skin part size is pressed on skin part, all the other 3 sides are pushed down again with briquetting, the manually bolt of all the other 3 sides fastening, do not tighten, remove aluminium sheet, open vavuum pump to vacuumize, skin part being close to vacuum inhales on card platform, select fastened tools by the bolt tightening of covering four side again, beat table look-up, guarantee that covering flattens completely, tolerance is within the scope of-0.04 ~ 0.04mm,
D milling, selects 3 coordinate high-speed milling machines, dedicated integral alloy slotting cutter, adopt successively successively block-by-block milling, milling is sunk passed examination after trough end, tool changing milling skin part profile, hole and opening, not milling is saturating, and all millings terminate rear cleaning skin-surface and platform, release bolt, close vavuum pump, remove pressure, remove briquetting, covering of slinging cleaning surface, the saturating profile of non-milling, opening are cut off in pincers worker, polishing burr.
Described single degree covering processing method, described briquetting is the cuboid kept flat, and the upper surface of described cuboid has the logical screw of through whole cuboid.
Described single degree covering processing method, adopts successively successively block-by-block milling to be specially in described steps d, 1) all sagging grooves are carried out the sagging degree of depth to sort from small to large, draw all sagging depth value A1 ~ An; Divide all sagging grooves of 2-3 secondary clearing milling to A1; 2) be that the sagging groove of A1 is got rid of by the sagging degree of depth, the milling degree of depth of sinking is the sagging groove of A2; 3) with reference to 2) repeatedly operate, namely get rid of all sagging grooves meeting technical requirement, milling all the other do not reach the sagging groove of requirement, until milling is sunk, the degree of depth is the sagging groove of An, terminates groove milling of sinking.
Described single degree covering processing method, shape clamp in the radian detecting skin part roll bending in described step b is specially and adopts, the model of described interior shape clamp is corresponding with the radian of described skin part roll bending.
Described single degree covering processing method, the thickness of described covering is 1.5-5.6mm.
Described single degree covering processing method, described covering is thick covering, and the thickness of described thick covering is 3.0-5.6mm.
Described single degree covering processing method, described covering has three radians.
Described single degree covering processing method, also comprises step e bis-roll bendings, and secondary roll bending feeding number of times is 5-10 time, and each amount of feeding is 0.2-0.5mm, and the top and bottom at skin part during secondary roll bending add backing plate, and the thickness of described backing plate is 0.76-2.29mm.
Single degree covering processing method of the present invention relative to the beneficial effect of prior art is:
Single degree covering processing method of the present invention, is applicable to the processing of various single degree covering, successfully milling is changed into machine milling, not only reduce the pollution to environment, also improve covering working (machining) efficiency and machining accuracy, cut down finished cost.
Detailed description of the invention
In Large Civil Aircraft, single degree covering occupies covering total amount more than 70%, and therefore single degree covering processes the particularly important effect had at aviation field.The present invention discloses a kind of single degree covering processing method, comprises the following steps:
A blanking, by plate shearing by the measure having more cover edges 200-240mm on trigger, forms skin part; Find out the arcuate positions needing roll bending, rule with marking pen.The roll bending radian that needs for simple covering is regulation radian, and for complicated covering, such as the roll bending radian that needs of single degree three radian covering, the thick covering of single degree is less than regulation radian.
B roll bending, numerical control triaxial is selected to roll bed, roll bending is carried out after wiping roller bearing, skin part, make three roller bearings rolling bed drive rotation, upper roller bearing does rectilinear motion feeding, 4-6 feeding simultaneously, the amount of feeding is 0.2-2mm, the height dimension that numerical control controls upper roller bearing is higher than skin thickness 5-10mm, selects Non-follow control roller bearing rotation direction, detects the radian of skin part roll bending.First must clean roller bearing and skin part before roll bending, avoid scratching skin part when roll bending.The feeding number of times of this step, the amount of feeding and roller bearing are relative to the height of covering, and when can meet roll bending, the stress of each radian of skin part, ensures that skin part can not produce resilience when follow-up flattening machine milling, affect the precision of covering radian.
C flattens, manufacture the vacuum being applicable to skin part size and inhale card platform, clean skin part, vacuum inhales card platform, for clamping the fixture of skin part, after on skin part of slinging its edge is leaned against locating piece that vacuum inhales card platform, whereabouts skin part, push down covering with briquetting and tilt side, the manually bolt of this side fastening, do not tighten, the aluminium sheet hanging to be slightly less than skin part size is pressed on skin part, all the other 3 sides are pushed down again with briquetting, the manually bolt of all the other 3 sides fastening, do not tighten, remove aluminium sheet, open vavuum pump to vacuumize, skin part being close to vacuum inhales on card platform, the bolt of covering four side is twisted dead with fastened tools again, beat table look-up, guarantee that covering flattens completely, tolerance is within the scope of-0.04 ~ 0.04mm.Before flattening, need clean skin part, vacuum to inhale card platform equally and be exclusively used in fixture and the briquetting of clamping covering, by the position of locating piece determination skin part, move around after avoiding putting skin part capturing position, by briquetting, aluminium sheet, skin part is fully deployed in vacuum and inhales on card platform by fixtures etc., employing fastened tools is fastening, and more manual fastening uniform force preferably adopts Pneumatic fastening tool.
D milling, selects 3 coordinate high-speed milling machines, dedicated integral alloy slotting cutter, adopt successively successively block-by-block milling, preferably successively successively block-by-block milling is specially, 1) all sagging grooves are carried out the sagging degree of depth to sort from small to large, draw all sagging depth value A1 ~ An; Divide all sagging grooves of 2-3 secondary clearing milling to A1; 2) be that the sagging groove of A1 is got rid of by the sagging degree of depth, the milling degree of depth of sinking is the sagging groove of A2; 3) with reference to 2) repeatedly operate, namely get rid of all sagging grooves meeting technical requirement, milling all the other do not reach the sagging groove of requirement, until milling is sunk, the degree of depth is the sagging groove of An, terminates groove milling of sinking.Milling is sunk passed examination after trough end, tool changing milling skin part profile, hole and opening, the skin material surplus not milling that namely not milling leaves 0.2-1mm thickness thoroughly on the skin part thickness direction of milling position is saturating, and all millings terminate rear cleaning skin-surface and platform, release bolt, close vavuum pump, remove pressure, remove briquetting, covering of slinging cleaning surface, the saturating profile of non-milling, opening are cut off in pincers worker, polishing burr.This step, because the covering launched is all with the stress of different size, in milling process, once very easily produce respective regions bulge phenomenon cause skin part to be crossed cutting, therefore the mode adopting successively successively block-by-block Z-direction feeding is needed to carry out milling, every block is sunk by the covering of milling and all evenly discharges its stress, avoided the situation of cutting or milling is not in place to occur.
Preferably, flatten in step at c, the briquetting using auxiliary clamping skin part is special skin part briquetting, and it is the cuboid kept flat, and the upper surface of cuboid has the logical screw of through whole cuboid.
Preferably, shape clamp in the radian detecting skin part roll bending in step b roll bending process is specially and adopts, the model of interior shape clamp is corresponding with the radian of described skin part roll bending.Interior shape clamp presses the inspection of mould tire conveniently much than traditional process, avoids the phenomenon that the skin part that moves around causes covering to scratch, improves the efficiency of roll bending simultaneously.
Preferably, the inventive method is also applicable to the processing of the thick covering of single degree, and the thickness of covering is 3.0-5.6mm.
Preferably, the inventive method is also suitable for the processing of the single degree covering with three radians.
For the situation that the gradient of three radians is more or less the same, milling after a roll bending, for the situation that three radian gradient differences are larger, also needs secondary roll bending.For the processing of the thick covering of single degree because a roll bending is to regulation radian, cannot flatten preferably too greatly due to stress in flattening step, so that affect the effect of milling, therefore the thick covering of single degree also needs to carry out secondary roll bending.After not too large for the radian gradient difference of roll bending to three during a single degree three radian covering roll bending, carry out milling, carry out secondary roll bending again after milling is complete, roll bending is to the radian required; For the thick covering of single degree, during a roll bending, roll bending is to after being less than regulation radian, and carry out milling, carry out secondary roll bending again after milling is complete, roll bending is to specifying radian.
Because the difficulty of secondary roll bending is very large, need to overcome machine milling collapsed position and easily produce impression and the phenomenon causing skin part to be scrapped, therefore, secondary roll bending feeding number of times is increased to 5-10 time, each amount of feeding is reduced into 0.2-0.5mm, top and bottom at skin part during roll bending add backing plate, and the thickness of backing plate is 0.76-2.29mm.For single degree three radian covering 85327151-107, this covering is single degree covering, profile divides 3 radians, is respectively R53, R20, R62 inch, and skin thickness is 3.81mm, difficulty of processing is very large, need adopt the method for secondary roll bending, roll bending becomes radian to be after R53, R40, R62 inch for the first time, carries out milling, after milling completes, then to carry out second time roll bending to radian be R53, R20, R62 inch.

Claims (8)

1. single degree covering processing method, is characterized in that: comprise the following steps:
A blanking, by plate shearing by the measure having more cover edges 200-240mm on trigger, forms skin part; Find out the arcuate positions needing roll bending, rule with marking pen;
B roll bending, numerical control triaxial is selected to roll bed, roll bending is carried out after wiping roller bearing, skin part, make three roller bearings rolling bed drive rotation, upper roller bearing does rectilinear motion feeding, 4-6 feeding simultaneously, the amount of feeding is 0.2-2mm, the height dimension that numerical control controls upper roller bearing is higher than skin thickness 5-10mm, selects Non-follow control roller bearing rotation direction, detects the radian of skin part roll bending;
C flattens, manufacture the vacuum being applicable to skin part size and inhale card platform, clean skin part, vacuum inhales card platform, for clamping the fixture of skin part, after on skin part of slinging its edge is leaned against locating piece that vacuum inhales card platform, whereabouts skin part, push down covering with briquetting and tilt side, the manually bolt of this side fastening, do not tighten, the aluminium sheet hanging to be slightly less than skin part size is pressed on skin part, all the other 3 sides are pushed down again with briquetting, the manually bolt of all the other 3 sides fastening, do not tighten, remove aluminium sheet, open vavuum pump to vacuumize, skin part being close to vacuum inhales on card platform, select fastened tools by the bolt tightening of covering four side again, beat table look-up, guarantee that covering flattens completely, tolerance is within the scope of-0.04 ~ 0.04mm,
D milling, selects 3 coordinate high-speed milling machines, dedicated integral alloy slotting cutter, adopt successively successively block-by-block milling, milling is sunk passed examination after trough end, tool changing milling skin part profile, hole and opening, not milling is saturating, and all millings terminate rear cleaning skin-surface and platform, release bolt, close vavuum pump, remove pressure, remove briquetting, covering of slinging cleaning surface, the saturating profile of non-milling, opening are cut off in pincers worker, polishing burr.
2. single degree covering processing method according to claim 1, is characterized in that: described briquetting is the cuboid kept flat, and the upper surface of described cuboid has the logical screw of through whole cuboid.
3. single degree covering processing method according to claim 1, is characterized in that: adopt successively successively block-by-block milling to be specially in described steps d, 1) all sagging grooves are carried out the sagging degree of depth sort from small to large, draw all sagging depth value A1 ~ An; Divide all sagging grooves of 2-3 secondary clearing milling to A1; 2) be that the sagging groove of A1 is got rid of by the sagging degree of depth, the milling degree of depth of sinking is the sagging groove of A2; 3) with reference to 2) repeatedly operate, namely get rid of all sagging grooves meeting technical requirement, milling all the other do not reach the sagging groove of requirement, until milling is sunk, the degree of depth is the sagging groove of An, terminates groove milling of sinking.
4. single degree covering processing method according to claim 1, is characterized in that: shape clamp in the radian detecting skin part roll bending in described step b is specially and adopts, the model of described interior shape clamp is corresponding with the radian of described skin part roll bending.
5. single degree covering processing method according to claim 1, is characterized in that: the thickness of described covering is 1.5-5.6mm.
6. single degree covering processing method according to claim 1, is characterized in that: described covering is thick covering, and the thickness of described thick covering is 3.0-5.6mm.
7. single degree covering processing method according to claim 1, is characterized in that: described covering has three radians.
8. the single degree covering processing method according to claim 6 or 7, it is characterized in that: also comprise step e bis-roll bendings, secondary roll bending feeding number of times is 5-10 time, each amount of feeding is 0.2-0.5mm, top and bottom at skin part during secondary roll bending add backing plate, and the thickness of described backing plate is 0.76-2.29mm.
CN201410136878.8A 2014-04-04 2014-04-04 Single degree covering processing method Expired - Fee Related CN103921068B (en)

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CN105033585A (en) * 2015-08-03 2015-11-11 江西洪都航空工业集团有限责任公司 Double-curved-surface sawtooth skin manufacturing method capable of controlling gap clearance precisely
CN105081009A (en) * 2015-09-14 2015-11-25 江西洪都航空工业集团有限责任公司 Correction cushion block for large roll-bent skin part
CN105397423B (en) * 2015-12-09 2017-06-20 北京航星机器制造有限公司 The manufacture method of the large thin-wall covering with interior muscle and complex-shaped surface mould
CN105665488A (en) * 2016-02-25 2016-06-15 成都飞机工业(集团)有限责任公司 Controlling method for residual stress on outer surface of roll bending skin
CN108817864B (en) * 2018-07-20 2020-07-28 北京星航机电装备有限公司 Titanium alloy arc-shaped part forming and positioning cutting method
CN109570924A (en) * 2018-12-03 2019-04-05 江西洪都航空工业集团有限责任公司 A kind of technique patch cutting method of covering class part
CN110238432B (en) * 2019-05-17 2021-06-01 陕西飞机工业(集团)有限公司 Single-bent multilayer chemical milling sample plate processing method
CN111673377A (en) * 2020-05-22 2020-09-18 浙江西子势必锐航空工业有限公司 Manufacturing process of single-curve aircraft skin

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