CN104226751A - Flexible stretch-bending and forming device for airplane sectional material - Google Patents
Flexible stretch-bending and forming device for airplane sectional material Download PDFInfo
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- CN104226751A CN104226751A CN201410369508.9A CN201410369508A CN104226751A CN 104226751 A CN104226751 A CN 104226751A CN 201410369508 A CN201410369508 A CN 201410369508A CN 104226751 A CN104226751 A CN 104226751A
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Abstract
The invention discloses a flexible stretch-bending and forming device for an airplane sectional material. The flexible stretch-bending and forming device comprises a base, two flexible steel bars and a plurality of dispersion adjusting units, wherein the dispersion adjusting unit is arranged on the base and the base is of a rectangular structure and is provided with a plurality of T-shaped mounting grooves in parallel along with a longitudinal direction; the dispersion adjusting units are connected by the base through bolts; the two ends of the two flexible steel bars are fixed in front of the dispersion adjusting units through bolts; the inner side faces of the flexible steel bars are matched with the surfaces of forming blocks of the dispersion adjusting units. The flexible steel bars are additionally arranged between each dispersion adjusting unit and a sectional material part to form a unidirectional continuous mould molded surface; the mould molded surface is continuous along with the stretching direction of the sectional material and the flexible steel bars have better rigidity and strength, so that the gap between the dispersion adjusting units is eliminated; the surface quality of a machining piece is improved and the forming precision can be guaranteed. The flexible stretch-bending and forming device is suitable for carrying out stretch-bending and forming on the sectional materials with different section shapes; the application range is wide and the practicability is stronger.
Description
Technical field
The present invention relates to shape stretch wrap forming technical field, specifically a kind of flexible stretch wrap forming device for aircraft section bar.
Background technology
During the every field that section bar part is applied to building, machine-building, communications and transportation and articles for daily use manufacture, consider the requirement of structural mechanics, aerodynamics and product structure, product appearance aspect, section bar all needs to bend to certain radian usually.Such as, in aircraft manufacturing, before and after engine nacelle and fuselage, the long purlin of section is as the main stressed part of composition airframe, directly affects the aerodynamic shape of aircraft, all adopts variable curvature extrudate bool.The principle of stretch wrap forming applies tangential pulling force to section bar, by changing the position of internal neutral layer, thus section bar bent.Stretch bending process has good forming effect for the crooked part that yield strength is larger, and bending quality is high, springback capacity is little.Stretch bending is formed in aircraft manufacturing the application obtained widely, be mainly used in the connector of shaping fuselage, bulkhead, rib, engine mount, adopt stretch bending process that part can be made to obtain rational school shape surplus, improve the accuracy of manufacture of part, reduce the manufacturing cost of part.Traditional stretch wrap forming adopts monolithic mold, but for the parts of multi items, small lot or even single-piece production, short period, low cost require to define great contradiction with a large amount of Job readiness time, and traditional tangible mold shortcoming highlights.In multiple spot stretch wrap forming, traditional moulds shape face is formed by multiple discrete element body surface, by regulating position and the freedom of movement of element body, can realize the Quick shape regulating of different stretch bending shaped mold and reusing, reducing production cost, realize flexible manufacturing.
For flexible stretch bending process problem, Chinese patent CN1O22407llA " multiparty control three-dimensional bending reverses shaping dies " discloses a kind of multiparty control three-dimensional bending be made up of mold base and several control units and reverses shaping dies, each control unit is installed on the independent rack of a standard, control unit is by support, forming face slide block, guide runner, vertical guide rail, limit element forms, shaping dies can realize three-dimensional bending and reverse the adjustment of product at the buckling curve in vertical plane direction, thus the space three-dimensional curved configuration realizing three-dimensional bending torsion member accurately controls.But weak point is, section bar directly and the forming face shoe contact of control unit, the gap between each control unit can be caused to eliminate, countersunk clearance in various discrete control unit between forming face slide block working face cannot be improved on the successional impact of workpiece shapes, the web of section bar part can be caused to occur significantly rough and uneven in surface at gap location, cause web surface to occur serious out-of-flatness.Therefore, need to design a kind of flexible stretch wrap forming device being suitable for aircraft section bar, and the gap between each control unit can be eliminated, ensure the continuity of section bar part shape, make the web surface of section bar part comparatively smooth.
Summary of the invention
For overcoming in existing flexible stretch wrap forming technology between each discrete adjustment unit countersunk clearance to the successional impact of workpiece shapes, section bar part is avoided to occur significantly rough and uneven in surface at gap location, improve the problem of section bar part at the planarization of gap location, the present invention proposes a kind of flexible stretch wrap forming device for aircraft section bar.Unidirectional continuous print die face is formed by adding flexible steel bar between each discrete adjustment unit and section bar part, due to continuous along section bar draw direction die face, and flexible steel bar has good Rigidity and strength, thus the gap eliminated between each discrete adjustment unit, improve gap between each discrete adjustment unit to the successional impact of workpiece shapes, both improve the surface quality of workpiece, can forming accuracy have been ensured again.
The technical solution adopted for the present invention to solve the technical problems is: comprise stretch benders chuck, characterized by further comprising discrete adjustment unit, flexible steel bar, pedestal, discrete adjustment unit is fixed on impact faces, flexible steel bar is positioned at before discrete adjustment unit, flexible steel bar medial surface coordinates with the cambered surface that discrete adjustment unit is formed, the two ends of section bar are fixed on stretch benders chuck, to be positioned on pedestal before discrete adjustment unit;
Described pedestal is cuboid, is longitudinally parallelly provided with many T-shaped mounting grooves;
Described flexible steel bar is two, has auricle with holes inside flexible steel bar both ends, and the shaping block on flexible steel bar and discrete adjustment unit is connected;
Described discrete adjustment unit comprises base, directive slide track, guide runner, height adjusting screw rod, cover plate, shaping block, plate after shaping block, base is T-type structure, directive slide track is positioned at front of chassis both sides and is connected by bolt, T-slot is formed on front side of directive slide track and base, guide runner both sides have projection to coordinate with directive slide track, cover plate is positioned at above base, and be connected by bolt with base, height adjusting screw rod one end is connected through the upper protruding block of cover plate convex platform screw and guide runner, height adjusting screw rod other end end is square structure, for regulating the height and position of guide runner, described shaping block leading flank is arc-shaped surface, intermediate lateral has arc groove, there is screw the upper and lower end face of shaping block, after shaping block, plate is between guide runner and shaping block, after shaping block, before the ears of plate side and guide runner, projection is bolted, and plate is that rotating shaft is rotated relative to guide runner with bolt after shaping block, the boss of plate another side and shaping block trailing flank central party slot fit after shaping block.
Described discrete adjustment unit is multiple.
Described flexible steel bar forms arc length and discrete adjustment unit forms discrete circular arc face length 1-2mm.
Beneficial effect
The flexible stretch wrap forming device for aircraft section bar that the present invention proposes, traditional monoblock type stretch bending mold is replaced by flexible stretch bending device, by regulating the position of discrete adjustment unit, realize the Quick shape regulating of different stretch bending shaped mold and reuse, reduce production cost, improve production efficiency, realize flexible manufacturing, simultaneously, the shaping block of the flexible stretch wrap forming device of the present invention can be changed according to part section feature, can carry out stretch wrap forming for the section bar of multiple different cross section shape, applicable surface is comparatively wide, and practicality is stronger.
The present invention forms unidirectional continuous print die face by adding flexible steel bar between multiple discrete adjustment unit and section bar part; Due to continuous along section bar draw direction die face, and flexible steel bar has good Rigidity and strength, thus the gap eliminated between each discrete adjustment unit, improve gap between each discrete adjustment unit to the successional impact of workpiece shapes, both improve the surface quality of workpiece, can forming accuracy have been ensured again.The present invention's flexible stretch wrap forming apparatus structure is simple, convenient and practical, be easy to processing and manufacturing.
Accompanying drawing explanation
Below in conjunction with drawings and embodiments, a kind of flexible stretch wrap forming device for aircraft section bar of the present invention is described in further detail.
Fig. 1 is the present invention's flexible stretch wrap forming apparatus structure schematic diagram.
Fig. 2 is the present invention's flexible stretch wrap forming device front view.
Fig. 3 is the discrete adjustment unit shaft mapping of the flexible stretch wrap forming device of the present invention.
Fig. 4 is the discrete adjustment unit front view of the flexible stretch wrap forming device of the present invention.
Fig. 5 is the discrete adjustment unit top view of the flexible stretch wrap forming device of the present invention.
Fig. 6 is each part connection diagram of the discrete adjustment unit of the flexible stretch wrap forming device of the present invention.
Fig. 7 is height adjusting screw rod and the shaping block link position schematic diagram of discrete adjustment unit of the present invention.
Fig. 8 is the understructure schematic diagram of discrete adjustment unit of the present invention.
Fig. 9 is the base side view of discrete adjustment unit of the present invention.
Figure 10 is the flexible steel bar schematic diagram of the flexible stretch wrap forming device of the present invention.
In figure:
1. stretch benders chuck 2. section bar 3. discrete adjustment unit 4. flexible steel bar 5. pedestal 6. directive slide track 7. cover plate 8. height adjusting screw rod 9. base 10. guide runner 11. block 12. that is shaped is shaped plate after block
Detailed description of the invention
The present embodiment is a kind of flexible stretch wrap forming device for aircraft section bar.
Consult Fig. 1 ~ Figure 10, in the present embodiment, flexible stretch wrap forming device is used for the flexible stretch wrap forming of aluminium alloy extrusions in T-shaped cross section.Flexible stretch wrap forming device is made up of stretch benders chuck 1 and discrete adjustment unit 3, flexible steel bar 4, pedestal 5; Pedestal 5 maintains static for cuboid, and pedestal 5 is longitudinally arranged with many T-shaped mounting grooves in parallel, discrete adjustment unit 3 is fastened by bolts on pedestal 5.Flexible steel bar 4 is arranged on the front portion of discrete adjustment unit 3, and the cambered surface that flexible steel bar 4 medial surface is formed with the shaping block 11 of discrete adjustment unit 3 coordinates.Stretch benders chuck 1 is fixed on the two ends of section bar 2, and section bar is positioned at the front portion of discrete adjustment unit 3 on pedestal 5.Flexible steel bar 4 is two, and every bar has auricle with holes inside flexible steel bar 4 both ends, is fixedly connected with the shaping block 11 on discrete adjustment unit 3 for flexible steel bar 4; Owing to adopting flexible steel bar 4, the die face formed along section bar 2 draw direction discrete adjustment unit 3 is made to become continuous, eliminate the gap between each discrete adjustment unit 3, improve gap between each discrete adjustment unit 3 to the successional impact of workpiece shapes.The quantity of discrete adjustment unit 3 determines according to the length of the part that specifically will be shaped and forming accuracy.
In the present embodiment, discrete adjustment unit 3 is made up of plate 12 after base 9, directive slide track 6, guide runner 10, height adjusting screw rod 8, cover plate 7, shaping block 11, shaping block; Base 9 is T-type structure, and two pieces of directive slide tracks 6 are arranged on base front part sides and are bolted to connection, and form T-shaped groove on front side of directive slide track 6 and base 9, the both sides of guide runner 10 have projection to coordinate with directive slide track 6.Cover plate 7 is arranged on being bolted to connection with base 9 of base 9 above, height adjusting screw rod 8 one end is fixedly connected with the upper protruding block of guide runner 10 through cover plate 7 convex platform screw, height adjusting screw rod 8 other end end is square structure, for regulating the height and position of guide runner 10.Shaping block 11 leading flank is arc-shaped surface, and intermediate lateral has arc groove, and respectively there is a screw upper surface, the lower surface of shaping block 11, for the fixed installation with flexible steel bar 4 two ends.After shaping block, plate 12 is arranged between guide runner 10 and shaping block 11, after shaping block, before the ears of plate 12 side and guide runner 10, projection is bolted, and plate 12 is that rotating shaft is rotated relative to guide runner 10 with bolt after shaping block, after shaping block, the boss of plate 12 another side and shaping block 11 trailing flank central party slot fit, prevent shaping block 11 from rotating in stretch bending process.Shaping block 11 is for the stretch wrap forming of specific sectional shape section bar, and the arc surface of shaping block 11 and the medial surface of flexible steel bar 4 are fitted, and shaping block 11 size is determined according to concrete part, changes shaping block 11 according to part section feature.
In the present embodiment, the thickness of pedestal 5 is 70mm, and pedestal 5 is longitudinally parallel is provided with many for installing the T-slot of discrete adjustment unit 3, and the width of the gap ratio discrete adjustment unit 3 of groove has more 1-2mm, ensures that discrete adjustment unit 3 can movement smoothly along the direction of groove.A guiding projection is arranged at the bottom of the base 9 of discrete adjustment unit 3, and the T-slot consistent size of guiding projection width dimensions and pedestal 5, discrete adjustment unit 3 does linear slide along the T-slot of pedestal 5.Flexible steel bar 4 be strip, and the width of flexible steel bar 4 is determined by T-shaped cross section section bar 2 size that will be shaped, in the longitudinal direction, the arc length of flexible steel bar 4 formation and discrete adjustment unit 3 form discrete circular arc face length 1-2mm.
When the flexible stretch wrap forming device of the present embodiment carries out stretch wrap forming, concrete steps are as follows:
The first step, the tune shape of stretch wrap forming device; According to profile in the part that target part shape facility obtains needed for stretch wrap forming, discrete processes is carried out to obtained profile, be divided into some sections, each section of correspondence discrete adjustment unit, the quantity of discrete adjustment unit determines according to the length of the part that specifically will be shaped and forming accuracy.According to the position of the die face discrete segments positional information determination discrete adjustment unit obtained, moved to by discrete adjustment unit after determining position, the T-slot bolt on fastening seat, completes the adjustment of discrete adjustment unit.Regulate height adjusting screw rod with spanner, make the height and position at guide runner place moderate, and ensure that the height at the guide runner place of each discrete adjustment unit is consistent, suitable shaping block and flexible steel bar are installed.
Second step, part stretch wrap forming process; Start stretch benders, clamp part to be formed with stretch benders chuck, setting stretch benders prestretched amount, benefit amount of tension and stretching cylinder speed parameter, remain set stretch benders parameter constant in stretch bending process.Carry out section bar prestretching process, after section bar prestretched amount reaches the prestretching amount of setting, carry out the stretch bending operation of part, after stretch bending operation terminates, carry out benefit drawing process, unload until section bar is mended after amount of tension reaches the benefit amount of drawing of setting.
3rd step, part forming accuracy detection; Stretch bending process terminates, dismounting part, adopts model or digitize shapes checkout equipment to carry out part forming accuracy detection.If form variations is in allowed band, the shaping profile that the discrete adjustment unit that this obtains is formed is the shaping profile of target part, repeats second step and produces in batches; If when profile shapes and target shape have a larger form variations, according to the size and Orientation of form variations, adjustment of displacement is carried out to the shaping block-type face of stretch wrap forming device, move forward and backward discrete adjustment unit by entirety to complete, and then be shaped, re-start part forming accuracy detection, until to the part shape deviation obtained in allowed band, the shaping profile that the discrete adjustment unit now obtained is formed is the shaping profile of target part, repeats second step and produces in batches.
Claims (3)
1. the flexible stretch wrap forming device for aircraft section bar, comprise stretch benders chuck, it is characterized in that: also comprise discrete adjustment unit, flexible steel bar, pedestal, discrete adjustment unit is fixed on impact faces, flexible steel bar is positioned at before discrete adjustment unit, flexible steel bar medial surface coordinates with the cambered surface that discrete adjustment unit is formed, and the two ends of section bar are fixed on stretch benders chuck, to be positioned on pedestal before discrete adjustment unit;
Described pedestal is cuboid, is longitudinally parallelly provided with many T-shaped mounting grooves;
Described flexible steel bar is two, has auricle with holes inside flexible steel bar both ends, and the shaping block on flexible steel bar and discrete adjustment unit is connected;
Described discrete adjustment unit comprises base, directive slide track, guide runner, height adjusting screw rod, cover plate, shaping block, plate after shaping block, base is T-type structure, directive slide track is positioned at front of chassis both sides and is connected by bolt, T-slot is formed on front side of directive slide track and base, guide runner both sides have projection to coordinate with directive slide track, cover plate is positioned at above base, and be connected by bolt with base, height adjusting screw rod one end is connected through the upper protruding block of cover plate convex platform screw and guide runner, height adjusting screw rod other end end is square structure, for regulating the height and position of guide runner, described shaping block leading flank is arc-shaped surface, intermediate lateral has arc groove, there is screw the upper and lower end face of shaping block, after shaping block, plate is between guide runner and shaping block, after shaping block, before the ears of plate side and guide runner, projection is bolted, and plate is that rotating shaft is rotated relative to guide runner with bolt after shaping block, the boss of plate another side and shaping block trailing flank central party slot fit after shaping block.
2. the flexible stretch wrap forming device for aircraft section bar according to claim 1, is characterized in that: described discrete adjustment unit is multiple.
3. the flexible stretch wrap forming device for aircraft section bar according to claim 1, is characterized in that: described flexible steel bar forms arc length and discrete adjustment unit forms discrete circular arc face length 1-2mm.
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CN201410369508.9A CN104226751A (en) | 2014-07-30 | 2014-07-30 | Flexible stretch-bending and forming device for airplane sectional material |
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CN201410369508.9A CN104226751A (en) | 2014-07-30 | 2014-07-30 | Flexible stretch-bending and forming device for airplane sectional material |
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Cited By (14)
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CN106493255A (en) * | 2016-12-09 | 2017-03-15 | 重庆寅悦恒工贸有限公司 | A kind of forming elbow mechanism |
CN106670277A (en) * | 2017-03-13 | 2017-05-17 | 西北工业大学 | Flexible wrinkle control device for raised flange of frame rib part and processing method thereof |
CN108889808A (en) * | 2018-06-15 | 2018-11-27 | 宁波市创捷自动化有限公司 | A kind of bending machine platform equipped with adjustable bending mould |
CN108994210A (en) * | 2017-06-07 | 2018-12-14 | 中海外交通建设有限公司 | Angle-bender |
CN109127913A (en) * | 2018-10-19 | 2019-01-04 | 吉林大学 | Multi-section around own axis controls profile three-dimensional bending forming mold |
CN109351825A (en) * | 2018-10-31 | 2019-02-19 | 上海宝冶集团有限公司 | Cold-bending forming device and its application method |
CN109530499A (en) * | 2017-09-21 | 2019-03-29 | 比亚迪股份有限公司 | The stretch bending process of stretch benders and profile |
CN109821944A (en) * | 2019-04-12 | 2019-05-31 | 长春工业大学 | A kind of Three Dimensional Thermal stretch wrap forming device of segmentation control shape temperature control |
CN109877199A (en) * | 2019-04-11 | 2019-06-14 | 长春工业大学 | A kind of multiple spot three-dimensional electric heating based on independent heat preserving mode draws-presses complex bend forming device |
CN109985939A (en) * | 2019-04-30 | 2019-07-09 | 长春工业大学 | A kind of large complicated three-dimensional bent structure part stretch wrap forming device |
CN110303090A (en) * | 2019-06-18 | 2019-10-08 | 吉林大学 | Shape system is adjusted in the automation of profile multiple spot stretch bending mold head body |
CN110743952A (en) * | 2019-10-31 | 2020-02-04 | 湖南同心模具制造有限公司 | Multipoint flexible digital forming die for concrete helical blade |
CN111266444A (en) * | 2020-03-11 | 2020-06-12 | 广东高谱弯曲技术有限公司 | A high-precision double-arm bending machine |
CN112474932A (en) * | 2020-11-13 | 2021-03-12 | 辽宁忠旺集团有限公司 | Multifunctional aluminum profile stretch bending forming die and stretch bending forming process |
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CN203664507U (en) * | 2013-12-22 | 2014-06-25 | 吉林大学 | Six-freedom-degree control partitioning type three-dimensional stretch-bending die for flexible section material |
CN103878238A (en) * | 2014-03-28 | 2014-06-25 | 中国航空工业集团公司北京航空制造工程研究所 | Flexible mold used for profile stretch bending |
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CN201186323Y (en) * | 2008-02-25 | 2009-01-28 | 西北工业大学 | Discrete mold for stretch-bending form |
CN102240711A (en) * | 2011-06-28 | 2011-11-16 | 于沛洲 | Three-dimensional bending, twisting and forming die based on multi-point control |
KR20130131107A (en) * | 2012-05-23 | 2013-12-03 | (주)경남금속 | Three dimension bending machine |
CN203664507U (en) * | 2013-12-22 | 2014-06-25 | 吉林大学 | Six-freedom-degree control partitioning type three-dimensional stretch-bending die for flexible section material |
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Cited By (20)
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CN106493255A (en) * | 2016-12-09 | 2017-03-15 | 重庆寅悦恒工贸有限公司 | A kind of forming elbow mechanism |
CN106670277A (en) * | 2017-03-13 | 2017-05-17 | 西北工业大学 | Flexible wrinkle control device for raised flange of frame rib part and processing method thereof |
CN108994210A (en) * | 2017-06-07 | 2018-12-14 | 中海外交通建设有限公司 | Angle-bender |
CN109530499A (en) * | 2017-09-21 | 2019-03-29 | 比亚迪股份有限公司 | The stretch bending process of stretch benders and profile |
CN108889808A (en) * | 2018-06-15 | 2018-11-27 | 宁波市创捷自动化有限公司 | A kind of bending machine platform equipped with adjustable bending mould |
CN108889808B (en) * | 2018-06-15 | 2023-10-20 | 宁波市创捷自动化有限公司 | Top bending machine platform with adjustable top bending die |
CN109127913A (en) * | 2018-10-19 | 2019-01-04 | 吉林大学 | Multi-section around own axis controls profile three-dimensional bending forming mold |
CN109351825A (en) * | 2018-10-31 | 2019-02-19 | 上海宝冶集团有限公司 | Cold-bending forming device and its application method |
CN109877199B (en) * | 2019-04-11 | 2023-08-18 | 长春工业大学 | Multi-point three-dimensional electrothermal drawing-pressing composite bending forming device based on independent heat preservation mode |
CN109877199A (en) * | 2019-04-11 | 2019-06-14 | 长春工业大学 | A kind of multiple spot three-dimensional electric heating based on independent heat preserving mode draws-presses complex bend forming device |
CN109821944A (en) * | 2019-04-12 | 2019-05-31 | 长春工业大学 | A kind of Three Dimensional Thermal stretch wrap forming device of segmentation control shape temperature control |
CN109821944B (en) * | 2019-04-12 | 2024-03-22 | 长春工业大学 | Three-dimensional hot stretch bending forming device with sectional shape control and temperature control |
CN109985939A (en) * | 2019-04-30 | 2019-07-09 | 长春工业大学 | A kind of large complicated three-dimensional bent structure part stretch wrap forming device |
CN109985939B (en) * | 2019-04-30 | 2024-01-23 | 长春工业大学 | Stretch bending forming device for large complex three-dimensional bending structural member |
CN110303090A (en) * | 2019-06-18 | 2019-10-08 | 吉林大学 | Shape system is adjusted in the automation of profile multiple spot stretch bending mold head body |
CN110303090B (en) * | 2019-06-18 | 2020-10-16 | 吉林大学 | Automatic shape adjusting system for section bar multipoint stretch bending die head body |
CN110743952B (en) * | 2019-10-31 | 2021-02-12 | 湖南同心模具制造有限公司 | Multipoint flexible digital forming die for concrete helical blade |
CN110743952A (en) * | 2019-10-31 | 2020-02-04 | 湖南同心模具制造有限公司 | Multipoint flexible digital forming die for concrete helical blade |
CN111266444A (en) * | 2020-03-11 | 2020-06-12 | 广东高谱弯曲技术有限公司 | A high-precision double-arm bending machine |
CN112474932A (en) * | 2020-11-13 | 2021-03-12 | 辽宁忠旺集团有限公司 | Multifunctional aluminum profile stretch bending forming die and stretch bending forming process |
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Application publication date: 20141224 |