CN103769820A - Global superplastic forming method of titanium alloy thin-wall deformed closed part - Google Patents
Global superplastic forming method of titanium alloy thin-wall deformed closed part Download PDFInfo
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- CN103769820A CN103769820A CN201410051922.5A CN201410051922A CN103769820A CN 103769820 A CN103769820 A CN 103769820A CN 201410051922 A CN201410051922 A CN 201410051922A CN 103769820 A CN103769820 A CN 103769820A
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- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
The invention belongs to the field of precision sheet metal processing and relates to a global superplastic forming method of a titanium alloy thin-wall deformed closed part. The method comprises the following steps: feeding; circularly rolling; welding; pre-forming; welding a blocking cover and a ventilating pipe; performing superplastic forming; performing margin cutting. The method has the advantages as follows: the problems of a large amount of required moulds, welding seams and welding tools, welding deformation control and the like in a conventional hot-pressing process of the thin-wall deformed closed part can be solved, and the stability of the welding process is improved; the advantages of various processes are comprehensively utilized, the large-sized titanium alloy thin-wall deformed closed part can be obtained by only one mould and one longitudinal welding seam and is light in weight and high in surface quality, and the inner and outer profiles of the part are in smooth transition.
Description
Technical field
The invention belongs to a kind of accurate panel beating method, be specifically related to the overall superplastic forming method of the special-shaped sealing of a kind of titanium alloy thin wall part, be applicable to the precision form of the irregular profile member of Aero-Space aluminium alloy.
Background technology
Titanium alloy has the outstanding advantages such as density is little, specific strength is high, corrosion-resistant, is the common structure material in aerospace field.Current, the lightweight of Aerospace Products parts forward, abnormal shapeization and integration future development, large size, thin walled special-shaped enclosed construction is more and more.For the special-shaped sealing of titanium alloy thin wall part, adopt conventional panel beating hot forming die needed many, and can only be shaped by distinguish, after assembly welding, also need to carry out hot school shape and guarantee dimensional accuracy, part weld seam is more, and processing cost is higher, and efficiency is lower; Adopt routine casting manufacturing process to be difficult to avoid thin-walled parts casting difficulty and weight problem rambunctious.
Summary of the invention
The object of this invention is to provide the overall superplastic forming method of the special-shaped sealing of a kind of titanium alloy thin wall part, it can solve the special-shaped sealing of titanium alloy thin wall part adopt conventional hot-press technique die needed many, weld seam is many, welding tooling is many, in processing, be prone to resilience, the problem such as wrinkling, strengthen welding process stability.
The present invention is achieved in that the overall superplastic forming method of the special-shaped sealing of a kind of titanium alloy thin wall part, it is characterized in that: comprise the steps,
First step blanking: calculate the development size of part to be processed, adopt single-piece plate blank under laser cutting, remove burr;
Second step volume circle: adopt furling plate round machine by plate blank volume circle, obtain cylinder blank;
The 3rd step welding: adopt argon arc welding welding drum blank longitudinal joint, obtain titanium cylinder;
The 4th step preform: adopt hot former that titanium cylinder is hot pressed into prefabricated blank, itself and die cavity shape are matched;
The 5th step weldering blanking cover, breather pipe: manufacture two blanking covers, a blanking cover is drilled through to pore with pneumatic drill, then two blanking covers are welded in respectively to prefabricated blank two ends with argon arc welding, breather pipe is welded in to passage position, obtain sealing prefabricated blank;
The 6th step superplastic forming: sealing prefabricated blank is put into superplastic forming die die cavity, connect gas circuit, insulation is carried out superplastic forming after superplastic forming temperature;
The 7th step surplus cutting: adopt laser cutting or line cutting mode to remove surplus, sharpened edge, removes burr, the special-shaped sealing of the titanium alloy thin wall part of acquisition required size.
Advantage of the present invention is, the present invention adopts the method for blank volume circle → argon arc welding longitudinal joint → preform → superplastic forming, fully utilize the advantage of each technique, only need a mold, one longitudinal seam can obtain the thin-wall special-shaped sealing part of large-scale titanium alloy, in part, outer mold surface seamlessly transits, and surface quality is high; The difficult problems such as it has overcome the special-shaped sealing of titanium alloy thin wall parts of Casting difficulty, and weight is difficult to be controlled, and heat treatment easily produces distortion, follow-up Special-Shaped Surface processing difficulties; Solve thin-wall special-shaped sealing part and adopted die needed many, the problem such as weld seam is many, welding tooling is many, welding deformation control of conventional hot-press technique; The preform that the present invention includes large-scale titanium alloy thin-walled straight tube, method is simple, easy operating, preform and superplastic forming adopt same set of mould, cost-saving.This step is convenient definite passage position both, reduces again blank superplastic forming deflection; By controlling preheating time and air pressure loading procedure, the sealing prefabricated blank after preform is carried out to superplastic forming, both guarantee the dimensional accuracy of the special-shaped sealing of titanium alloy part, can remove again stress, eliminate resilience, improve working (machining) efficiency.
Accompanying drawing explanation
Fig. 1 is the front view of thin-wall special-shaped sealing part;
Fig. 2 is the top view of thin-wall special-shaped sealing part;
Fig. 3 is the left view of thin-wall special-shaped sealing part;
Fig. 4 is titanium cylinder development figure;
Fig. 5 is the titanium barrier part after volume circle.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
An overall superplastic forming method for the special-shaped sealing of titanium alloy thin wall part, comprises the steps:
First step blanking: calculate the development size of part to be processed, adopt single-piece plate blank under Laser Welding, remove burr;
Second step volume circle: adopt furling plate round machine by plate blank volume circle, obtain cylinder blank;
The 3rd step welding: adopt argon arc welding welding drum blank longitudinal joint, obtain titanium cylinder;
The 4th step preform: adopt hot former that titanium cylinder is hot pressed into prefabricated blank, make it close with die cavity shape, both convenient definite passage position, reduced again blank superplastic forming deflection;
The 5th step weldering blanking cover, breather pipe: manufacture two blanking covers, a blanking cover is drilled through to pore with pneumatic drill, then two blanking covers are welded in respectively to prefabricated blank two ends with argon arc welding, breather pipe is welded in to passage position, obtain sealing prefabricated blank;
The 6th step superplastic forming: sealing prefabricated blank is put into superplastic forming die die cavity, connect gas circuit, insulation is carried out superplastic forming after superplastic forming temperature;
The 7th step surplus cutting: adopt laser cutting or line cutting mode to remove surplus, sharpened edge, removes burr, the special-shaped sealing of the titanium alloy thin wall part of acquisition required size.
Take the air intake duct part of the special-shaped enclosed construction of titanium alloy thin wall as example, as shown in Figure 2,3, material is the TA15 titanium alloy that 2.0mm is thick to its geomery.
Concrete lower processing step carries out:
First step blanking: calculate the development size of thin-wall special-shaped sealing part, adopt single-piece blank under laser cutting method, be of a size of 880mm × 830mm, as shown in Figure 4, remove burr.
Second step volume circle: adopt general use volume circular knitting machine that plate blank is rolled into cylinder blank, allow uncoveredly or overlapping, avoid assemble welding gap, be of a size of Φ 280mm × 830mm, as shown in Figure 5.
The 3rd step weldering longitudinal joint: to the pickling of cylinder blank, clean up to be placed in drying oven and dry at 100～150 ℃ 20～30 minutes before weldering; Adopt wire brush and scraper to polish to weld zone, remove burr, and use acetone scrub, before weldering, keep weld zone clean; Workpiece is assemblied on General clamping and compresses longitudinal joint is overlapped with welding gun run trace; Starting protection gas is evenly put solid 4～6 points on longitudinal joint according to assembling situation, argon arc welding longitudinal joint, guarantees that appearance of weld is good.
The 4th step preform: titanium cylinder blank is put into mold cavity, adopt hot former that titanium cylinder is hot pressed into titanium alloy prefabricated blank, now prefabricated blank is relative fixing with mould upper vent hole position, and prefabricated blank size still has larger gap from part final size.
The 5th step weldering blanking cover, breather pipe: adopting bit size is that the pneumatic drill of Φ 6mm is by the ventilation position boring of a Φ 280mm blanking cover, breather pipe pickling to two blanking covers and Φ 6mm before weldering, cleans up to be placed in drying oven and at 100～150 ℃, dries 20～30 minutes; Adopt wire brush and scraper to polish to weld zone, remove burr, and use acetone scrub, before weldering, keep weld zone clean; By blanking cover and prefabricated blank justify align, adopt argon arc welding welding blanking cover, breather pipe is welded in to blanking cover passage position, be welded into the sealing prefabricated blank with breather pipe.
The 6th step superplastic forming: be coated with slip coating Ti-1# at the sealing prefabricated blank surface uniform welding, dry; Superplastic forming die is heated to 920～930 ℃; Sealing prefabricated blank is put into lower mode cavity, and breather pipe is put into mould passage, matched moulds; Connect gas circuit, after insulation 10min, carry out superplastic forming, under gas pressure, part is pad pasting gradually.
The 7th step surplus cutting: according to part final size in Fig. 1,2,3, superplastic forming part is rule, adopt laser cutting or line cutting mode to remove surplus, sharpened edge, removes burr, obtains the final part of Fig. 2,3 illustrated dimension requirements.
Claims (1)
1. an overall superplastic forming method for the special-shaped sealing of titanium alloy thin wall part, is characterized in that: comprises the steps,
First step blanking: calculate the development size of part to be processed, adopt single-piece plate blank under laser cutting, remove burr;
Second step volume circle: adopt furling plate round machine by plate blank volume circle, obtain cylinder blank;
The 3rd step welding: adopt argon arc welding welding drum blank longitudinal joint, obtain titanium cylinder;
The 4th step preform: adopt hot former that titanium cylinder is hot pressed into prefabricated blank, itself and die cavity shape are matched;
The 5th step weldering blanking cover, breather pipe: manufacture two blanking covers, a blanking cover is drilled through to pore with pneumatic drill, then two blanking covers are welded in respectively to prefabricated blank two ends with argon arc welding, breather pipe is welded in to passage position, obtain sealing prefabricated blank;
The 6th step superplastic forming: sealing prefabricated blank is put into superplastic forming die die cavity, connect gas circuit, insulation is carried out superplastic forming after superplastic forming temperature;
The 7th step surplus cutting: adopt laser cutting or line cutting mode to remove surplus, sharpened edge, removes burr, the special-shaped sealing of the titanium alloy thin wall part of acquisition required size.
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| CN201410051922.5A CN103769820A (en) | 2013-10-22 | 2014-02-14 | Global superplastic forming method of titanium alloy thin-wall deformed closed part |
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| CN201310499763 | 2013-10-22 | ||
| CN201310499763.0 | 2013-10-22 | ||
| CN201410051922.5A CN103769820A (en) | 2013-10-22 | 2014-02-14 | Global superplastic forming method of titanium alloy thin-wall deformed closed part |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493436A (en) * | 2014-11-25 | 2015-04-08 | 北京航星机器制造有限公司 | Method for manufacturing cylindrical titanium alloy parts with two ends flanged inwards through forced supplementing |
| CN104588982A (en) * | 2014-11-26 | 2015-05-06 | 北京航星机器制造有限公司 | Super-plastic forming/diffusion bonding forming method for large-curvature complex surface titanium alloy part |
| CN105690033A (en) * | 2016-02-02 | 2016-06-22 | 贵州凯星液力传动机械有限公司 | Processing method for thin-wall barrels |
| CN106112388A (en) * | 2016-06-17 | 2016-11-16 | 航天材料及工艺研究所 | A kind of overall superplastic forming method of variable cross-section barrel-type casing |
| CN107253021A (en) * | 2017-06-13 | 2017-10-17 | 湖北汉光科技股份有限公司 | The spherical lower heat shielding method for manufacturing parts of velocity modulation tube electron gun |
| CN107695154A (en) * | 2017-11-10 | 2018-02-16 | 北京航星机器制造有限公司 | A kind of method for improving aluminium alloy cylindrical body high temperature internal pressure shaping qualification rate |
| CN110605537A (en) * | 2019-09-17 | 2019-12-24 | 成都飞机工业（集团）有限责任公司 | Manufacturing method of titanium alloy bent conduit |
| CN111001699A (en) * | 2019-12-26 | 2020-04-14 | 大连理工大学 | Method for manufacturing thin-wall metal component by adopting 3D printing and hot air pressure bulging |
| CN111360486A (en) * | 2018-12-25 | 2020-07-03 | 四川明日宇航工业有限责任公司 | Forming method of flat pipe fitting |
| CN114193103A (en) * | 2021-12-21 | 2022-03-18 | 北京星航机电装备有限公司 | Closed cabin and preparation method thereof |
| CN114310166A (en) * | 2021-12-21 | 2022-04-12 | 北京星航机电装备有限公司 | Blank of closed cabin, preparation method of blank and forming method of closed cabin |
| CN115740987A (en) * | 2022-12-06 | 2023-03-07 | 东方电气集团东方汽轮机有限公司 | Preparation method of high-precision fin-shaped thin-wall special-shaped part for gas turbine |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493436B (en) * | 2014-11-25 | 2018-11-09 | 北京航星机器制造有限公司 | A kind of manufacturing method having the both ends in-flanges titanium alloy cylindrical part for forcing feed supplement |
| CN104493436A (en) * | 2014-11-25 | 2015-04-08 | 北京航星机器制造有限公司 | Method for manufacturing cylindrical titanium alloy parts with two ends flanged inwards through forced supplementing |
| CN104588982A (en) * | 2014-11-26 | 2015-05-06 | 北京航星机器制造有限公司 | Super-plastic forming/diffusion bonding forming method for large-curvature complex surface titanium alloy part |
| CN105690033A (en) * | 2016-02-02 | 2016-06-22 | 贵州凯星液力传动机械有限公司 | Processing method for thin-wall barrels |
| CN105690033B (en) * | 2016-02-02 | 2017-12-22 | 贵州凯星液力传动机械有限公司 | A kind of processing method of thin-wall barrel |
| CN106112388A (en) * | 2016-06-17 | 2016-11-16 | 航天材料及工艺研究所 | A kind of overall superplastic forming method of variable cross-section barrel-type casing |
| CN106112388B (en) * | 2016-06-17 | 2019-02-15 | 航天材料及工艺研究所 | A kind of whole superplastic forming method of variable cross-section barrel-type casing |
| CN107253021A (en) * | 2017-06-13 | 2017-10-17 | 湖北汉光科技股份有限公司 | The spherical lower heat shielding method for manufacturing parts of velocity modulation tube electron gun |
| CN107253021B (en) * | 2017-06-13 | 2023-04-07 | 湖北汉光科技股份有限公司 | Method for manufacturing spherical-crown-shaped lower heat shield part of klystron electron gun |
| CN107695154A (en) * | 2017-11-10 | 2018-02-16 | 北京航星机器制造有限公司 | A kind of method for improving aluminium alloy cylindrical body high temperature internal pressure shaping qualification rate |
| CN111360486A (en) * | 2018-12-25 | 2020-07-03 | 四川明日宇航工业有限责任公司 | Forming method of flat pipe fitting |
| CN110605537A (en) * | 2019-09-17 | 2019-12-24 | 成都飞机工业（集团）有限责任公司 | Manufacturing method of titanium alloy bent conduit |
| CN111001699A (en) * | 2019-12-26 | 2020-04-14 | 大连理工大学 | Method for manufacturing thin-wall metal component by adopting 3D printing and hot air pressure bulging |
| CN114193103A (en) * | 2021-12-21 | 2022-03-18 | 北京星航机电装备有限公司 | Closed cabin and preparation method thereof |
| CN114310166A (en) * | 2021-12-21 | 2022-04-12 | 北京星航机电装备有限公司 | Blank of closed cabin, preparation method of blank and forming method of closed cabin |
| CN114310166B (en) * | 2021-12-21 | 2023-03-14 | 北京星航机电装备有限公司 | Forming method of closed cabin |
| CN115740987A (en) * | 2022-12-06 | 2023-03-07 | 东方电气集团东方汽轮机有限公司 | Preparation method of high-precision fin-shaped thin-wall special-shaped part for gas turbine |
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Application publication date: 20140507 |