CN104139281A - Arc-shaped titanium alloy thin-walled part forming tooling and method - Google Patents
Arc-shaped titanium alloy thin-walled part forming tooling and method Download PDFInfo
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- CN104139281A CN104139281A CN201410302289.2A CN201410302289A CN104139281A CN 104139281 A CN104139281 A CN 104139281A CN 201410302289 A CN201410302289 A CN 201410302289A CN 104139281 A CN104139281 A CN 104139281A
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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
Abstract
The invention relates to an arc-shaped titanium alloy thin-walled part forming tooling and an arc-shaped titanium alloy thin-walled part forming method, belongs to a metal material forming mold and a use method thereof, and solves the problems of long processing period and high production cost of existing titanium alloy thin-walled parts. The arc-shaped titanium alloy thin-walled part forming tooling comprises a cylinder, four limit blocks, four positioning blocks and a plurality of wrapping tape components. When the forming tooling is used for forming, two arc-shaped thin-walled parts to be formed cover the outer surface of a cylinder, and are limited in the vertical direction by the four limit blocks and the four positioning blocks, then are tightly hooped by the plurality of wrapping tap components uniformly distributed along the vertical direction of the cylinder and are butted to form a complete cylinder. The forming method comprises cutting, pre-forming, assembling, fastening, heat setting and disassembling steps. The forming tooling provided by the invention is simple in structure and convenient to manufacture and use; the method provided by the invention can meet the forming demands of large-diameter titanium alloy thin-walled parts, avoids the traditional and complex long-cycle working procedures of welding, thermal expansion, cutting and the like, so that the production cycle is greatly shortened, and the production efficiency is greatly improved.
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
The covering class part that has different-thickness, size, shape in body structure, covering is the main body that body structure middle deck section skeleton covers, it is being born cabin Duan Chengre, is guaranteeing the vital tasks such as body aerodynamic configuration, cabin body load.During covering body working flight, must bear pressure.In covering production, maximum difficulty is 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 is directly to roll to be rolled into school shape after shape, can guarantee the form and position tolerance such as linearity, circularity of part; And when its material is titanium alloy, because the yield strength of titanium alloy plate is high, springback capacity is large, the method that volume is rolled in employing is difficult to guarantee that its circularity meets model, often takes the method processing of preform, welding, bulging, line cutting, and its shortcoming is that the process-cycle is long, production cost is high.
Want workout cost and periodic problem, primarily solve complex procedures problem, the first production cycle that shortens part, it is less important takes unanimously easy, the quick while can guarantee the processing method of the form and position tolerance of part again, makes 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 that uses 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 costs.
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 a plurality of band assembly, it is characterized in that:
Described cylindrical shell is cylindrical shape, and its lower surface has annular flange flange, for circular arc thin-walled parts is located, circle tube inner wall has modal circumferential stiffening rib, to guarantee cylindrical shell rigidity, the external diameter of cylindrical shell equates 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 shaped, one and mutually perpendicular vertical plane and horizontal plane, consist of, and have through hole on horizontal plane, for through bolt;
Described locating piece shape is identical, is solid rectangle piece, has the installing hole perpendicular to upper surface, for passing bolt;
Two mutually perpendicular diameter end of upper surface corresponding circle tubular 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;
Between the barrel of the vertical plane of limited block, locating piece and described cylindrical shell, there is the gap that holds circular arc thin-walled parts thickness to be formed, so that circular arc thin-walled parts to be formed moves;
While using described titanium alloy circular arc thin-walled parts fixture for forming to be shaped, two circular arc thin-walled parts to be formed are covered in described barrel outer surface, spacing in the vertical direction by 4 limited blocks and 4 locating pieces, then by along the equally distributed a plurality of band assembly bandings of cylindrical shell vertical direction to being connected into complete circle cylinder.
Described titanium alloy circular arc thin-walled parts fixture for forming, is characterized in that:
The structure and composition of described a plurality of band assemblies is identical, includes separately band, eyelet bolt, joint;
Described band is strip metal plate, and its one end is female end and forms ring set, for passing pin, is connected with eyelet bolt, and 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 consists of two engaging lugs and the Connection Block of one, two engaging lugs are vertically fixed on Connection Block, between two engaging lugs, form Baltimore groove, for holding the male end of described band, on two engaging lugs, there is respectively circular hole, for the male end through pin and described band, be connected; On Connection Block, there is bolt hole, for passing described eyelet bolt;
The eyelet bolt upper end of each band assembly is included described band female end in, and through pin, the two is connected, and includes described band male end in, and make the two connection through pin between two engaging lugs of joint;
During each band assembly banding, the eyelet bolt lower end of same band assembly is passed after the bolt hole on Connection Block, coordinates with nut, can regulate eyelet bolt to pass length, thereby by band assembly banding.
The manufacturing process that uses described titanium alloy circular arc thin-walled parts fixture for forming, comprises the steps:
Cutting step: make water cutter cutting titanium alloy thin wall plate, guarantee spare part outside measurement and form and position tolerance, obtain the part spread material of rectangle;
Preform step: roll on bed part spread material is carried out to roll forming at three axles, become arcuate member;
Installation step: along limited block, the locating piece of fixture for forming cylindrical shell upper and lower end, adopt to slide, fashion of extrusion is respectively charged into two arcuate members between cylindrical shell and limited block, locating piece, spacing in the vertical direction by each limited block, locating piece, by waling docking along the equally distributed a plurality of band assemblies of cylindrical shell vertical direction, be covered in barrel outer surface again;
Fastening step: between a plurality of band assemblies and two arcuate members, adopt two block length bar shaped backing plates to be pressed on two joints of two arcuate members, and adopt polylith arc backing plate to be lining in corresponding each band assembly self junction, each band assembly of banding;
Add heat setting step: the fixture for forming of two arcuate members of banding is inserted to shaft furnace heating, 750 ℃ ± 10 ℃ of heating-up temperatures, temperature retention time 60min ± 10min, is cooled to not higher than 550 ℃ with stove, is cooled to room temperature after taking-up;
Demounting procedure: dismantle a plurality of band assemblies, strip backing plate and arc backing plate from cylindrical shell, then the bolt of each limited block, locating piece is fixed in dismounting, and two arcuate members that are shaped to semi arch are taken off.
The opposite joint of part adopts strip arc backing plate to compress; Employing side, gap between part and eyelet bolt, joint, band, arc backing plate compress, and effectively avoided problem wrinkling after part forming; Extremely cannot mould unloading for avoiding that eyelet bolt and nut are swollen after thermoforming, eyelet bolt and nut adopt high-temperature alloy material, improve its durability.
Fixture for forming of the present invention is simple in structure, manufacture and easy to use, and applicability is wide; Method of the present invention is used common shaft furnace to carry out hot forming, the semi arch arcuate member of formed thereby is as covering, through riveted joint, be assembled into cabin section, size of components and form and position tolerance after riveted joint all meet the demands after testing, first-time qualification rate 100%, can meet the shaping of titanium alloy thin wall major diameter part, avoid tradition, the complicated long period operations such as traditional welding, heat expansion type, cutting, greatly be shortened, production efficiency improves greatly the production cycle.
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 profile schematic diagram of semi arch;
Figure 11 is strip backing plate schematic diagram;
Figure 12 is arc backing plate schematic diagram.
The specific embodiment
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 circular arc thin-walled parts is located, circle tube inner wall has modal circumferential stiffening rib 1-2, and to guarantee cylindrical shell rigidity, the external diameter of cylindrical shell equates 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 shapes are identical, and cross section is L shaped, one and mutually perpendicular vertical plane 2-1 and horizontal plane 2-2, consist of, and have through hole 2-2A on horizontal plane, for through bolt;
As shown in Figure 4, described locating piece 3 shapes are identical, are solid rectangle piece, have the installing hole 3-1 perpendicular to upper surface, for passing bolt;
As shown in Figure 1, two mutually perpendicular diameter end of upper surface corresponding circle tubular 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;
Between the barrel of the vertical plane of limited block, locating piece and described cylindrical shell, there is the gap that holds circular arc thin-walled parts thickness to be formed, so that circular arc thin-walled parts to be formed moves;
While using described titanium alloy circular arc thin-walled parts fixture for forming to be shaped, two circular arc thin-walled parts to be formed are covered in described cylindrical shell 1 outer surface, spacing in the vertical direction by 4 limited blocks and 4 locating pieces, then by along equally distributed five band assembly 4 bandings of cylindrical shell 1 vertical direction to being connected into complete circle cylinder.
As shown in Figure 5, the structure and composition of a plurality of band assemblies 4 is identical, includes separately band 4-1, eyelet bolt 4-2, joint 4-3;
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 consists of two engaging lug 4-3-1 and the Connection Block 4-3-2 of one, two engaging lug 4-3-1 are vertically fixed on Connection Block 4-3-2, between two engaging lug 4-3-1, form Baltimore groove, for holding the male end of described band 4-1, on two engaging lug 4-3-1, there is respectively circular hole 4-3-1A, for being connected with the male end of described band 4-1 through pin; On Connection Block 4-3-2, there is bolt hole 4-3-2A, for passing described eyelet bolt 4-2;
The eyelet bolt 4-2 upper end of each band assembly 4 is included described band 4-1 female end in, and through pin, the two is connected, and includes described band 4-1 male end in, and make the two connection through pin between two engaging lug 4-3-1 of joint 4-3;
During each band assembly 4 banding, the eyelet bolt 4-2 lower end of same band assembly 4 is passed after the bolt hole 4-3-2A on Connection Block 4-3-2, coordinates with nut, can regulate eyelet bolt to pass length, thereby by band assembly 4 bandings.
In the present embodiment, cylindrical shell is by machined the forming of 1Cr18Ni9Ti material casting, and limited block, locating piece are formed by 1Cr18Ni9Ti materials processing;
Band is crooked by 1Cr18Ni9Ti sheet material, be 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;
The embodiment that uses the manufacturing process of described titanium alloy circular arc thin-walled parts fixture for forming, comprises the steps:
Cutting step: make water cutter cutting titanium alloy thin wall plate, guarantee spare part outside measurement and form and position tolerance, obtain the part spread material of rectangle, long 3000mm, wide 1000mm, thickness is 1.5mm;
Preform step: roll on bed part spread material is carried out to roll forming at three axles, 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 to slide, fashion of extrusion is respectively charged into two arcuate members between cylindrical shell and limited block, locating piece, spacing in the vertical direction by each limited block, locating piece, again by waling docking along equally distributed five the band assemblies of cylindrical shell vertical direction, be covered in barrel outer surface
Fastening step: between a plurality of band assemblies and two arcuate members, adopt two block length bar shaped backing plates to be pressed on two joints of two arcuate members, and adopt polylith arc backing plate to be lining in corresponding each band assembly self junction, each band assembly of banding;
Add heat setting step: the fixture for forming of two arcuate members of banding is inserted to shaft furnace heating, 750 ℃ ± 10 ℃ of heating-up temperatures, temperature retention time 60min ± 10min, is cooled to not higher than 550 ℃ with stove, is cooled to room temperature after taking-up;
Demounting procedure: dismantle a plurality of band assemblies, strip backing plate and arc backing plate from cylindrical shell, then the bolt of each limited block, locating piece is fixed in dismounting, and two arcuate members that are shaped to semi arch are taken off.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 step, strip backing plate as shown in figure 11, by the 1Cr18Ni9Ti stainless steel materials of length 1000mm, width 100mm, thickness 2mm, crooked arc processed of width, arc radius R955mm, so as after to install and part outer surface fit; Its effect be while avoiding thermoforming part joint band banding position is not wrinkling.
Arc backing plate as shown in figure 12, by the 1Cr18Ni9Ti stainless steel materials of length 250mm, width 80mm, thickness 2mm, crooked arc processed of length direction, arc radius R955mm, so as after to install and part outer surface fit; Its effect is that the gap location that while 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 a plurality of band assembly (4), it is characterized in that:
Described cylindrical shell (1) is cylindrical shape, its lower surface has annular flange flange (1-1), for circular arc thin-walled parts is located, circle tube inner wall has modal circumferential stiffening rib (1-2), to guarantee cylindrical shell rigidity, the external diameter of cylindrical shell equates 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 shaped, by one and mutually perpendicular vertical plane (2-1) and horizontal plane (2-2) formation, has through hole (2-2A), for passing bolt on horizontal plane;
Described locating piece (3) shape is identical, is solid rectangle piece, has the installing hole (3-1) perpendicular to upper surface, for passing bolt;
Two mutually perpendicular diameter end of upper surface corresponding circle tubular 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;
Between the barrel of the vertical plane of limited block, locating piece and described cylindrical shell, there is the gap that holds circular arc thin-walled parts thickness to be formed, so that circular arc thin-walled parts to be formed moves;
While using described titanium alloy circular arc thin-walled parts fixture for forming to be shaped, two circular arc thin-walled parts to be formed are covered in described cylindrical shell (1) outer surface, spacing in the vertical direction by 4 limited blocks and 4 locating pieces, then by along cylindrical shell (1) the equally distributed a plurality of band assemblies of vertical direction (4) banding to being connected into complete circle cylinder.
2. titanium alloy circular arc thin-walled parts fixture for forming as claimed in claim 1, is characterized in that:
The structure and composition of described a plurality of band assemblies (4) is identical, includes separately band (4-1), eyelet bolt (4-2), joint (4-3);
Described band (4-1) is strip metal plate, and its one end is female end (4-1A) and forms ring set, for passing pin, is connected with eyelet bolt, and 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) consists of two engaging lugs (4-3-1) and the Connection Block (4-3-2) of one, two engaging lugs (4-3-1) are vertically fixed on Connection Block (4-3-2), between two engaging lugs (4-3-1), form Baltimore groove, be used for holding the male end of described band (4-1), on two engaging lugs (4-3-1), there is respectively circular hole (4-3-1A), for being connected with the male end of described band (4-1) through pin; On Connection Block (4-3-2), there is bolt hole (4-3-2A), for passing described eyelet bolt (4-2);
Eyelet bolt (4-2) upper end of each band assembly (4) is included described band (4-1) female end in, and make the two connection through pin, between two engaging lugs (4-3-1) of joint (4-3), include described band (4-1) male end in, and make the two connection through pin;
During each band assembly (4) banding, eyelet bolt (4-2) lower end of same band assembly (4) is passed after the bolt hole (4-3-2A) on Connection Block (4-3-2), coordinate with nut, can regulate eyelet bolt to pass length, thereby by band assembly (4) banding.
3. right to use requires the manufacturing process of titanium alloy circular arc thin-walled parts fixture for forming described in 1, comprises the steps:
Cutting step: make water cutter cutting titanium alloy thin wall plate, guarantee spare part outside measurement and form and position tolerance, obtain the part spread material of rectangle,
Preform step: roll on bed part spread material is carried out to roll forming at three axles, become arcuate member;
Installation step: along the limited block of fixture for forming cylindrical shell upper end, the locating piece of lower end, adopt to slide, fashion of extrusion is respectively charged into two arcuate members between cylindrical shell and limited block, locating piece, spacing in the vertical direction by each limited block, locating piece, again by waling docking along the equally distributed a plurality of band assemblies of cylindrical shell vertical direction, be covered in barrel outer surface
Fastening step: between a plurality of band assemblies and two arcuate members, adopt two block length bar shaped backing plates to be pressed on two joints of two arcuate members, and adopt polylith arc backing plate to be lining in corresponding each band assembly self junction, each band assembly of banding;
Add heat setting step: the fixture for forming of two arcuate members of banding is inserted to shaft furnace heating, 750 ℃ ± 10 ℃ of heating-up temperatures, temperature retention time 60min ± 10min, is cooled to not higher than 550 ℃ with stove, is cooled to room temperature after taking-up;
Demounting procedure: dismantle a plurality of band assemblies, strip backing plate and arc backing plate from cylindrical shell, then the bolt of each limited block, locating piece is fixed in dismounting, and two arcuate members that are shaped to semi arch are taken off.
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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 CN104139281B (en) | 2016-03-02 |
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| CN107695397A (en) * | 2017-09-30 | 2018-02-16 | 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 |
| CN107812803A (en) * | 2017-11-30 | 2018-03-20 | 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 |
| CN108817864A (en) * | 2018-07-20 | 2018-11-16 | 北京星航机电装备有限公司 | A kind of forming of titanium alloy arc-shaped workpiece and positional dissection method |
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| 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 |
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| 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 |
| CN110315292A (en) * | 2019-07-09 | 2019-10-11 | 中国航发哈尔滨东安发动机有限公司 | A kind of control method of helicopter duplex membranous disc machining deformation |
| CN112658600A (en) * | 2020-11-30 | 2021-04-16 | 上海航天精密机械研究所 | Method for processing general titanium alloy cabin welded by metal plate |
| 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 |
| CN113084463A (en) * | 2021-04-20 | 2021-07-09 | 中国直升机设计研究所 | Method for machining outer sleeve of infrared stealth device of helicopter |
| 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 |
| CN114210797A (en) * | 2021-12-17 | 2022-03-22 | 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 |
| 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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