CN104139281B - A kind of titanium alloy circular arc thin-walled parts fixture for forming and method - Google Patents
A kind of titanium alloy circular arc thin-walled parts fixture for forming and method Download PDFInfo
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- CN104139281B CN104139281B CN201410302289.2A CN201410302289A CN104139281B CN 104139281 B CN104139281 B CN 104139281B CN 201410302289 A CN201410302289 A CN 201410302289A CN 104139281 B CN104139281 B CN 104139281B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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Abstract
A kind of titanium alloy circular arc thin-walled parts fixture for forming and method, belong to metal material forming die and using method thereof, solve the problem that the existing titanium alloy thin-wall part process-cycle is long, production cost is high.The present invention includes cylindrical shell, four limited blocks, four locating pieces and multiple band assemblies, when using described fixture for forming to be shaped, two pieces of circular arc thin-walled parts to be formed are covered in described barrel outer surface, by 4 limited blocks and 4 locating pieces spacing in the vertical direction, then be butted into complete cylinder by along the equally distributed multiple band assembly banding of cylindrical shell vertical direction.Manufacturing process of the present invention comprises cutting, preform, assembling, fastening, heat set and demounting procedure.Fixture for forming structure of the present invention is simple, manufactures and easy to use; Method of the present invention can meet the shaping of titanium alloy thin wall major diameter part, avoids the tradition such as traditional welding, heat expansion type, cutting, complicated long period operation, the production cycle is shortened greatly, production efficiency improves greatly.
Description
Technical field
The invention belongs to metal material forming die and using method thereof, be specifically related to a kind of titanium alloy circular arc thin-walled parts fixture for forming and method.
Background technology
In body structure, have the covering class part of different-thickness, size, shape, covering is the main body that body structure middle deck section skeleton covers, and it bears the vital tasks such as cabin Duan Chengre, guarantee body aerodynamic configuration, cabin body load.Pressure must be born during the work of covering projectile flight.In covering production, maximum difficulty to resolve its profile form and position tolerance problem.
Wall thickness is less than the aluminum alloy round arc thin-wall part of 2.0mm, and existing manufacturing process directly rolls to be rolled into school shape after shape, can ensure the form and position tolerances such as the linearity of part, circularity; And when its material is titanium alloy, because the yield strength of titanium alloy plate is high, springback capacity is large, adopt the method for rolling volume to be difficult to ensure that its circularity meets model, often take the method processing of preform, welding, bulging, Linear cut, its shortcoming is that the process-cycle is long, production cost is high.
Want workout cost and periodic problem, primary solve complex procedures problem, the first production cycle shortening part, it is secondary can ensure again take unanimously easy, quick while the processing method of the form and position tolerance of part to make cost and quality reach dynamic equilibrium.
Summary of the invention
The invention provides a kind of titanium alloy circular arc thin-walled parts fixture for forming, the manufacturing process using this frock is provided simultaneously, solve the problem that the existing titanium alloy thin-wall part process-cycle is long, production cost is high, with improve part forming accuracy, shorten the production cycle, reduce production cost.
A kind of titanium alloy circular arc thin-walled parts fixture for forming provided by the present invention, comprises cylindrical shell, four limited blocks, four locating pieces and multiple band assemblies, it is characterized in that:
Described cylindrical shell is cylindrical shape, and its lower surface has annular flange flange, for locating circular arc thin-walled parts, circle tube inner wall has modal circumferential stiffening rib, to ensure cylindrical shell rigidity, the external diameter of cylindrical shell is equal with the circular arc internal diameter of circular arc thin-walled parts to be formed, and tolerance is+0.3mm ~+0.5mm;
Described four limited block shapes are identical, and cross section is L shape, by one and mutually perpendicular vertical plane and horizontal plane form, horizontal plane has through hole, for through bolt;
Described locating piece shape is identical, is solid rectangle block, has the installing hole perpendicular to upper surface, for passing bolt;
Upper surface corresponding circle tubular two mutually perpendicular diameter end of described cylindrical shell have respectively been bolted a limited block, the vertical plane direction of each limited block down,
In the annular flange flange of described cylindrical shell, the limited block position correspondence of vertical corresponding cylindrical shell upper surface is fixed with locating piece;
The vertical plane of limited block, there is the gap holding circular arc thin-walled parts thickness to be formed, so that circular arc thin-walled parts to be formed moves between locating piece and the barrel of described cylindrical shell;
When using described titanium alloy circular arc thin-walled parts fixture for forming to be shaped, two pieces of circular arc thin-walled parts to be formed are covered in described barrel outer surface, by 4 limited blocks and 4 locating pieces spacing in the vertical direction, then be butted into complete cylinder by along the equally distributed multiple band assembly banding of cylindrical shell vertical direction.
Described titanium alloy circular arc thin-walled parts fixture for forming, is characterized in that:
The structure of described multiple band assembly is identical with composition, includes band, eyelet bolt, joint separately;
Described band is strip metal plate, and its one end is female end and forms ring set, and for being connected with eyelet bolt through pin, the band other end is male end and forms ring set, for being connected with joint through pin;
Described eyelet bolt is metal rod like parts, and its upper end has and axially vertical connecting hole, and for being connected with described band female end through pin, eyelet bolt lower end has external screw thread, and it is flat that the shaft of eyelet bolt has milling, for coordinating with spanner;
Described joint is by two engaging lugs and Connection Block is integral forms, two engaging lugs are vertically fixed on Connection Block, form Baltimore groove between two engaging lugs, for holding the male end of described band, two engaging lugs has circular hole respectively, for being connected with the male end of described band through pin; Connection Block has bolt hole, for passing described eyelet bolt;
The eyelet bolt upper end of each band assembly includes described band female end in, and makes the two connect through pin, includes described band male end between two engaging lugs of joint, and makes the two connect through pin;
During each band assembly banding, the eyelet bolt lower end of same band assembly, through after the bolt hole on Connection Block, with nut screw connection, can regulate eyelet bolt to pass length, thus by band assembly banding.
Use the manufacturing process of described titanium alloy circular arc thin-walled parts fixture for forming, comprise the steps:
Cutting step: use high pressure waterjet titanium alloy thin wall plate, ensure spare part outside measurement and form and position tolerance, obtain the part spread material of rectangle;
Preliminary forming step: roll on bed at three axles and roll forming is carried out to part spread material, become arcuate member;
Installation step: along limited block, the locating piece of fixture for forming cylindrical shell upper and lower end, adopt slide, two pieces of arcuate members are respectively charged into cylindrical shell and limited block by fashion of extrusion, between locating piece, spacing in the vertical direction by each limited block, locating piece, wale docking by along the equally distributed multiple band assembly of cylindrical shell vertical direction again, be covered in barrel outer surface;
Fastening steps: between multiple band assembly and two pieces of arcuate members, adopts two block length bar shaped backing plates to be pressed on two joints of two pieces of arcuate members, and adopts polylith arc backing plate to be lining in corresponding each self junction of band assembly, each band assembly of banding;
Heat set step: the fixture for forming of banding two pieces of arcuate members is inserted shaft furnace heating, heating-up temperature 750 DEG C ± 10 DEG C, temperature retention time 60min ± 10min, is cooled to not higher than 550 DEG C with stove, is cooled to room temperature after taking-up;
Demounting procedure: dismantle multiple band assembly, strip backing plate and arc backing plate from cylindrical shell, then the two pieces of arcuate members being shaped to semi arch are taken off by the bolt of the fixing each limited block of dismounting, locating piece.
The opposite joint of part adopts strip arc backing plate to compress; Gap employing side between part and eyelet bolt, joint, band, arc backing plate compress, problem wrinkling after effectively prevent part forming; For avoiding eyelet bolt and nut swollen dead and cannot mould unloading after thermoforming, eyelet bolt and nut adopt high-temperature alloy material, improve its durability.
Fixture for forming structure of the present invention is simple, manufactures and easy to use, and applicability is wide; Method of the present invention uses common shaft furnace to carry out hot forming, semi arch arcuate member formed thereby is as covering, cabin section is assembled into through riveted joint, size of components after riveted joint and form and position tolerance all meet the demands after testing, first-time qualification rate 100%, the shaping of titanium alloy thin wall major diameter part can be met, avoid the tradition such as traditional welding, heat expansion type, cutting, complicated long period operation, the production cycle is shortened greatly, production efficiency improves greatly.
Accompanying drawing explanation
Fig. 1 is fixture for forming schematic diagram of the present invention;
Fig. 2 is cylindrical shell schematic diagram;
Fig. 3 is limited block schematic diagram; ;
Fig. 4 is locating piece schematic diagram;
Fig. 5 is band assembly schematic diagram;
Fig. 6 is band schematic diagram;
Fig. 7 is eyelet bolt schematic diagram;
Fig. 8 is joint schematic diagram;
Fig. 9 is the schematic diagram of preform rear arc part;
Figure 10 is the arcuate member appearance schematic diagram of semi arch;
Figure 11 is strip backing plate schematic diagram;
Figure 12 is arc backing plate schematic diagram.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further described.
As shown in Figure 1, the embodiment of titanium alloy circular arc thin-walled parts fixture for forming provided by the present invention, comprises cylindrical shell 1, four limited blocks 2, four locating pieces 3 and five band assemblies 4,
As shown in Figure 2, described cylindrical shell 1 is cylindrical shape, its lower surface has annular flange flange 1-1, for locating circular arc thin-walled parts, circle tube inner wall has modal circumferential stiffening rib 1-2, and to ensure cylindrical shell rigidity, the external diameter of cylindrical shell is equal with the circular arc internal diameter of circular arc thin-walled parts to be formed, for R955, tolerance is+0.3mm ~+0.5mm;
As shown in Figure 3, described each limited block 2 shape is identical, and cross section is L shape, by one and mutually perpendicular vertical plane 2-1 and horizontal plane 2-2 form, horizontal plane has through hole 2-2A, for through bolt;
As shown in Figure 4, described locating piece 3 shape is identical, is solid rectangle block, has the installing hole 3-1 perpendicular to upper surface, for passing bolt;
As shown in Figure 1, upper surface corresponding circle tubular two mutually perpendicular diameter end of described cylindrical shell have respectively been bolted a limited block, and the vertical plane direction of each limited block down;
In the annular flange flange of described cylindrical shell, the limited block position correspondence of vertical corresponding cylindrical shell upper surface is fixed with locating piece, and the vertical plane of each locating piece is directed upwardly;
The vertical plane of limited block, there is the gap holding circular arc thin-walled parts thickness to be formed, so that circular arc thin-walled parts to be formed moves between locating piece and the barrel of described cylindrical shell;
When using described titanium alloy circular arc thin-walled parts fixture for forming to be shaped, two pieces of circular arc thin-walled parts to be formed are covered in described cylindrical shell 1 outer surface, by 4 limited blocks and 4 locating pieces spacing in the vertical direction, then be butted into complete cylinder by along equally distributed five band assembly 4 bandings of cylindrical shell 1 vertical direction.
As shown in Figure 5, the structure of multiple band assembly 4 is identical with composition, includes band 4-1, eyelet bolt 4-2, joint 4-3 separately;
As shown in Figure 6, band 4-1 is strip metal plate, adopts the Cr18Ni9Ti thin plate processing of 1mm thickness, its one end is female end 4-1A and forms ring set, for being connected with eyelet bolt through pin, the band other end is male end 4-1B and forms ring set, for being connected with joint through pin;
As shown in Figure 7, eyelet bolt 3-2 is metal rod like parts, and its upper end has and axially vertical connecting hole 4-2A, for being connected with described band female end through pin, eyelet bolt lower end has external screw thread 4-2B, and the shaft of eyelet bolt has the flat 4-2C of milling, for coordinating with spanner;
As shown in Figure 8, joint 4-3 is by two engaging lug 4-3-1 and Connection Block 4-3-2 is integral forms, two engaging lug 4-3-1 are vertically fixed on Connection Block 4-3-2, Baltimore groove is formed between two engaging lug 4-3-1, for holding the male end of described band 4-1, two engaging lug 4-3-1 has circular hole 4-3-1A respectively, for being connected with the male end of described band 4-1 through pin; Connection Block 4-3-2 has bolt hole 4-3-2A, for passing described eyelet bolt 4-2;
The eyelet bolt 4-2 upper end of each band assembly 4 includes described band 4-1 female end in, and makes the two connect through pin, includes described band 4-1 male end between two engaging lug 4-3-1 of joint 4-3, and makes the two connect through pin;
During each band assembly 4 banding, the eyelet bolt 4-2 lower end of same band assembly 4, through after the bolt hole 4-3-2A on Connection Block 4-3-2, with nut screw connection, can regulate eyelet bolt to pass length, thus by band assembly 4 banding.
In the present embodiment, cylindrical shell forms by 1Cr18Ni9Ti cast is machined, and limited block, locating piece are formed by 1Cr18Ni9Ti materials processing;
Band is bent by 1Cr18Ni9Ti sheet material, is welded, and its girth is slightly less than cylindrical shell external diameter girth, and eyelet bolt and joint are formed by high-temperature alloy material machining;
Use the embodiment of the manufacturing process of described titanium alloy circular arc thin-walled parts fixture for forming, comprise the steps:
Cutting step: use high pressure waterjet titanium alloy thin wall plate, ensure spare part outside measurement and form and position tolerance, obtain the part spread material of rectangle, long 3000mm, wide 1000mm, thickness is 1.5mm;
Preliminary forming step: roll on bed at three axles and roll forming is carried out to part spread material, become arcuate member, as shown in Figure 9;
Installation step: along the limited block of fixture for forming cylindrical shell upper and lower end, adopt slide, two pieces of arcuate members are respectively charged into cylindrical shell and limited block by fashion of extrusion, between locating piece, spacing in the vertical direction by each limited block, locating piece, docking is waled again by along equally distributed five the band assemblies of cylindrical shell vertical direction, be covered in barrel outer surface
Fastening steps: between multiple band assembly and two pieces of arcuate members, adopts two block length bar shaped backing plates to be pressed on two joints of two pieces of arcuate members, and adopts polylith arc backing plate to be lining in corresponding each self junction of band assembly, each band assembly of banding;
Heat set step: the fixture for forming of banding two pieces of arcuate members is inserted shaft furnace heating, heating-up temperature 750 DEG C ± 10 DEG C, temperature retention time 60min ± 10min, is cooled to not higher than 550 DEG C with stove, is cooled to room temperature after taking-up;
Demounting procedure: dismantle multiple band assembly, strip backing plate and arc backing plate from cylindrical shell, then the two pieces of arcuate members being shaped to semi arch are taken off by the bolt of the fixing each limited block of dismounting, locating piece.As shown in Figure 10, appearance and size and form and position tolerance meet drawing and matching requirements to the arcuate member profile of semi arch.
In described fastening steps, as shown in figure 11, by the 1Cr18Ni9Ti stainless steel materials of length 1000mm, width 100mm, thickness 2mm, width bends arc processed to strip backing plate, arc radius R955mm, so that installation is rear and part outer surface is fitted; Its effect is that when avoiding thermoforming, part joint band non-banding position is wrinkling.
As shown in figure 12, by the 1Cr18Ni9Ti stainless steel materials of length 250mm, width 80mm, thickness 2mm, length direction bends arc processed to arc backing plate, arc radius R955mm, so that installation is rear and part outer surface is fitted; Its effect is that the gap location that when avoiding thermoforming, part connects at band, eyelet bolt, joint is fastening and wrinkling without external force.
Claims (3)
1. a titanium alloy circular arc thin-walled parts fixture for forming, comprises cylindrical shell (1), four limited blocks (2), four locating pieces (3) and multiple band assemblies (4), it is characterized in that:
Described cylindrical shell (1) is cylindrical shape, its lower surface has annular flange flange (1-1), for locating circular arc thin-walled parts, circle tube inner wall has modal circumferential stiffening rib (1-2), to ensure cylindrical shell rigidity, the external diameter of cylindrical shell is equal with the circular arc internal diameter of circular arc thin-walled parts to be formed, and tolerance is+0.3mm ~+0.5mm;
Described limited block (2) shape is identical, and cross section is L shape, by one and mutually perpendicular vertical plane (2-1) and horizontal plane (2-2) form, horizontal plane has through hole (2-2A), for pass bolt;
Described locating piece (3) shape is identical, is solid rectangle block, has the installing hole (3-1) perpendicular to upper surface, for passing bolt;
Upper surface corresponding circle tubular two mutually perpendicular diameter end of described cylindrical shell have respectively been bolted a limited block, the vertical plane direction of each limited block down,
In the annular flange flange of described cylindrical shell, the limited block position correspondence of vertical corresponding cylindrical shell upper surface is fixed with locating piece;
The vertical plane of limited block, there is the gap holding circular arc thin-walled parts thickness to be formed, so that circular arc thin-walled parts to be formed moves between locating piece and the barrel of described cylindrical shell;
When using described titanium alloy circular arc thin-walled parts fixture for forming to be shaped, two pieces of circular arc thin-walled parts to be formed are covered in described cylindrical shell (1) outer surface, by 4 limited blocks and 4 locating pieces spacing in the vertical direction, then be butted into complete cylinder by along equally distributed multiple band assembly (4) banding of cylindrical shell (1) vertical direction.
2. titanium alloy circular arc thin-walled parts fixture for forming as claimed in claim 1, is characterized in that:
The structure of described multiple band assembly (4) is identical with composition, includes band (4-1), eyelet bolt (4-2), joint (4-3) separately;
Described band (4-1) is strip metal plate, its one end is female end (4-1A) and forms ring set, for being connected with eyelet bolt through pin, the band other end is male end (4-1B) and forms ring set, for being connected with joint through pin;
Described eyelet bolt (4-2) is metal rod like parts, its upper end has and axially vertical connecting hole (4-2A), for being connected with described band female end through pin, eyelet bolt lower end has external screw thread (4-2B), the shaft of eyelet bolt has milling flat (4-2C), for coordinating with spanner;
Described joint (4-3) is by two engaging lugs (4-3-1) and Connection Block (4-3-2) is integral forms, two engaging lugs (4-3-1) are vertically fixed on Connection Block (4-3-2), Baltimore groove is formed between two engaging lugs (4-3-1), for holding the male end of described band (4-1), two engaging lugs (4-3-1) has circular hole (4-3-1A) respectively, for being connected with the male end of described band (4-1) through pin; Connection Block (4-3-2) has bolt hole (4-3-2A), for passing described eyelet bolt (4-2);
Eyelet bolt (4-2) upper end of each band assembly (4) includes described band (4-1) female end in, and make the two connect through pin, include described band (4-1) male end between two engaging lugs (4-3-1) of joint (4-3), and make the two connect through pin;
During each band assembly (4) banding, eyelet bolt (4-2) lower end of same band assembly (4) is through after the bolt hole (4-3-2A) on Connection Block (4-3-2), with nut screw connection, eyelet bolt can be regulated to pass length, thus by band assembly (4) banding.
3. use the manufacturing process of titanium alloy circular arc thin-walled parts fixture for forming described in claim 1, comprise the steps:
Cutting step: use high pressure waterjet titanium alloy thin wall plate, ensure spare part outside measurement and form and position tolerance, obtain the part spread material of rectangle,
Preliminary forming step: roll on bed at three axles and roll forming is carried out to part spread material, become arcuate member;
Installation step: along the locating piece of the limited block of fixture for forming cylindrical shell upper end, lower end, adopt slide, two pieces of arcuate members are respectively charged into cylindrical shell and limited block by fashion of extrusion, between locating piece, spacing in the vertical direction by each limited block, locating piece, docking is waled again by along the equally distributed multiple band assembly of cylindrical shell vertical direction, be covered in barrel outer surface
Fastening steps: between multiple band assembly and two pieces of arcuate members, adopts two block length bar shaped backing plates to be pressed on two joints of two pieces of arcuate members, and adopts polylith arc backing plate to be lining in corresponding each self junction of band assembly, each band assembly of banding;
Heat set step: the fixture for forming of banding two pieces of arcuate members is inserted shaft furnace heating, heating-up temperature 750 DEG C ± 10 DEG C, temperature retention time 60min ± 10min, is cooled to not higher than 550 DEG C with stove, is cooled to room temperature after taking-up;
Demounting procedure: dismantle multiple band assembly, strip backing plate and arc backing plate from cylindrical shell, then the two pieces of arcuate members being shaped to semi arch are taken off by the bolt of the fixing each limited block of dismounting, locating piece.
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| CN201410302289.2A CN104139281B (en) | 2014-06-27 | 2014-06-27 | A kind of titanium alloy circular arc thin-walled parts fixture for forming and method |
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| CN201410302289.2A CN104139281B (en) | 2014-06-27 | 2014-06-27 | A kind of titanium alloy circular arc thin-walled parts fixture for forming and method |
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| CN104139281B true CN104139281B (en) | 2016-03-02 |
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| CN106670813A (en) * | 2016-12-14 | 2017-05-17 | 中航飞机股份有限公司西安飞机分公司 | Forming method and mold for airplane clamping hoop part |
| CN107695397B (en) * | 2017-09-30 | 2019-03-29 | 江西洪都航空工业集团有限责任公司 | A kind of two-sided docking processing method of adjustment of thin-walled workpiece |
| CN107812803B (en) * | 2017-11-30 | 2018-12-25 | 中国航发沈阳黎明航空发动机有限责任公司 | A kind of devices and methods therefor for titanium alloy welding component Vacuum Heat correction type face |
| 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 |
| AT16588U1 (en) * | 2018-12-10 | 2020-02-15 | Plansee Se | Shielding for a high temperature furnace |
| CN110315292B (en) * | 2019-07-09 | 2021-06-08 | 中国航发哈尔滨东安发动机有限公司 | Method for controlling machining deformation of duplex membrane disc of helicopter |
| CN112658600B (en) * | 2020-11-30 | 2023-02-17 | 上海航天精密机械研究所 | Method for processing general titanium alloy cabin welded by metal plate |
| CN113084463B (en) * | 2021-04-20 | 2022-09-16 | 中国直升机设计研究所 | Method for machining outer sleeve of infrared stealth device of helicopter |
| CN114210797B (en) * | 2021-12-17 | 2023-11-14 | 湖北三江航天红阳机电有限公司 | Arc pre-bending and shape correcting method for titanium alloy cylindrical skin |
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| US7459048B2 (en) * | 2006-01-31 | 2008-12-02 | The Boeing Company | One-piece inner shell for full barrel composite fuselage |
| CN103028903B (en) * | 2012-11-22 | 2015-05-13 | 西安航空动力股份有限公司 | Thermal forming method and fixture for titanium alloy damping sleeve |
| CN102974988B (en) * | 2012-12-03 | 2015-04-08 | 西安航天动力机械厂 | Drum coiling and forming method based on spin forming blank manufacture |
| CN103273281B (en) * | 2013-06-20 | 2016-01-20 | 中航虹波风电设备有限公司 | A kind of construction technology of thin-wall barrel |
| CN103341734A (en) * | 2013-07-08 | 2013-10-09 | 中国北车集团大同电力机车有限责任公司 | Locomotive side wall curved surface skin forming method |
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