CN104668417B - Undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique - Google Patents
Undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique Download PDFInfo
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- CN104668417B CN104668417B CN201510064322.7A CN201510064322A CN104668417B CN 104668417 B CN104668417 B CN 104668417B CN 201510064322 A CN201510064322 A CN 201510064322A CN 104668417 B CN104668417 B CN 104668417B
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Abstract
Undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique, first to carrying out preheating jumping-up repeatedly, pulling for the unimach of forming aircraft undercarriage urceolus forging or the metal bar material of titanium alloy material, to obtain the distortion state metal bar material of storage distortional strain energy；This distortion state metal bar material is carried out radial forging and obtains radial forging distortion state blank Quenching Treatment by recycling waste heat；The state blank of this radial forging distortion subsequently carries out secondary remelting to obtain solid rate undercarriage urceolus forging semi-solid blank between 40%～60%；Finally this undercarriage urceolus forging semi-solid blank is carried out semisolid die forging to obtain undercarriage urceolus forging forming part.It is simple that the present invention has technique, and forming pressure is little, the feature that stock utilization is high and product mechanical property is good.
Description
Technical field
The invention belongs to undercarriage urceolus forging manufacturing technology field, particularly to undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique.
Background technology
Professor Flemings of 20 century 70 Massachusetts Institute Technologies proposes the semi-solid-state shaping concept of metal parts.So-called semisolid die forging (Semi-solidforging-SSF) is also known as thixotroping mold segment (Thixoforging), it is exactly in the mould cavity with slightly higher preheating temperature, carry out a die-forging forming after semi-solid blank is heated to the semi-solid state of about 50% volume liquid phase, obtaining the required technique close to size fabricated part, this is a kind of new technology between liquid forming (casting) and stock state shaping (pressure processing).
Undercarriage is one of main function components of aircraft, for taking off, landing, ground taxi and parking, it absorb and dissipation aircraft land and in taxiing procedures with the impact energy on ground, it is ensured that aircraft use safety in ground motion process, is the main load parts of aircraft.According to statistics, owing to the stressing conditions of present generation aircraft undercarriage is serious and service condition severe, undercarriage fault accounts for the 40% of full machine total failare.Along with carrying out of the big Aircraft Project of China, under high speed, big load, moving load condition, the performance requirement of undercarriage is also more and more higher.
At present, the main components material of undercarriage is mainly with unimach, titanium alloy is main, as 300M steel is mainly applied in external civil aircraft undercarriage selection, 4340 steel, 30CrMnSiNi2A, high strength titanium alloy and the contour performance materials of aluminium alloy, its manufacturing process specifically includes that solid forging base, the detection of forging physics and chemistry and ultrasonic examination, big surplus numerical control " stripping off the skin " processing in forging blank surface, endoporus impression material removes processing etc., wherein, it is compared to the shortcoming that the machine-tooled method that conventional airplane undercarriage adopts mostly causes fatigue strength and stability all relatively low, integral forging and forming technique can improve the structural homogenity of undercarriage, good streamline, improve its serviceability, but in forging base process, there is mould heating temperature high, fragile, required forging and molding power is big, the shortcoming that energy consumption is high.
Summary of the invention
For the shortcoming overcoming above-mentioned prior art, it is an object of the invention to provide undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique, by this technique, prepare the undercarriage urceolus forging with the spherical microstructure of n on-dendritic fine uniform with less plastic force.
In order to achieve the above object, the technical scheme that the present invention takes is:
Undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique, comprises the following steps:
1) bar preliminary deformation: be first ready for the unimach of forming aircraft undercarriage urceolus forging or the metal bar material 1 of titanium alloy material；Then metal bar material 1 preheated and carry out jumping-up repeatedly, pulling, to obtain the distortion state metal bar material 2 of storage distortional strain energy；
2) bar radial forging: utilize waste heat to step 1) in the distortion state metal bar material 2 that obtains carry out radial forging to obtain radial forging distortion state blank 3；
3) secondary remelting: by step 2) in the radial forging through Quenching Treatment that the obtains state blank 3 that distorts put in electric furnace or Medium Frequency Induction Heating Furnace and be heated and isothermal holding, and control in the semi-solid temperature interval range that heating-up temperature is metal bar material 1, temperature retention time is 5～30min, and has the undercarriage urceolus forging semi-solid blank 4 of microstructure tiny, uniform, spherical between 40%～60% obtaining fraction solid；
4) semisolid Integral die-forged shapes: by step 3) the undercarriage urceolus forging semi-solid blank 4 that obtains puts into the mold cavity that semisolid die forging shapes, and adopts semisolid die forging process forming to go out undercarriage urceolus forging forming part 5.
Relative to prior art, radial forging formula strain-induced semisolid die forging technique is used for preparing undercarriage urceolus forging and has the advantage that by the present invention
1. the present invention utilize undercarriage urceolus forging prepared by radial forging formula strain-induced to have microstructure crystal grain is tiny, be evenly distributed, dense structure, product mechanics better performances feature, in addition, the performance of conventional forging parts is anisotropic, and semisolid die forging is isotropism then.
2. it is little that undercarriage urceolus forging is adopted by the present invention semisolid die forging shapes required forming pressure, is only needed for common die forging about the 1/4 to 1/10 of forming pressure.
3. contour forging technique needs to adopt hotdie forging press or friction press etc. to invest higher equipment, and equipment investment is expensive, and semisolid die forging i.e. available special oil press, it is also possible to oil universal press, equipment investment is less.
Accompanying drawing explanation
Fig. 1 is from metal bar material 1 to the process chart of undercarriage urceolus forging forming part 5 in the present invention.
Fig. 2 is the schematic three dimensional views of radial forging distortion state blank 3 in the present invention.
Fig. 3 is the schematic three dimensional views of undercarriage urceolus forging forming part 5 in the present invention.
Fig. 4 utilizes waste heat to step 1 in the present invention) in the distortion state metal bar material 2 that obtains carry out radial forging to obtain the principle schematic of radial forging distortion state blank 3, wherein figure (a) is front view, and figure (b) is side view.
Fig. 5 is the schematic diagram of the maximum outline curve 5-1 of undercarriage urceolus forging forming part 5 profile in the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is described in detail.
With reference to Fig. 1, undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique, comprise the following steps:
1) bar preliminary deformation: be first ready for the unimach of forming aircraft undercarriage urceolus forging or the metal bar material 1 of titanium alloy material；Then metal bar material 1 preheated and carry out jumping-up repeatedly, pulling, to obtain the distortion state metal bar material 2 of storage distortional strain energy；
2) bar radial forging: with reference to Fig. 2, Fig. 3, Fig. 4 and Fig. 5, utilize waste heat to step 1) in the distortion state metal bar material 2 that obtains carry out radial forging to obtain radial forging distortion state blank 3, particularly as follows: utilize radial forging machine at four tups 6 of blank distribution symmetrical about, distortion state metal bar material 2 is radially carried out high-frequent reciprocating forge, and four tups 6 are bigger in feed variation rule radially entirety compared with the maximum appearance profile curve 5-1 of undercarriage urceolus forging forming part 5, utilize mechanical hand band dynamical distortion state metal bar material 2 to rotate while do axial feed motion simultaneously, make blank pull out in multi-head spiral extensional situation to attenuate, when the shrinkage factor of the maximum radial section 3-1 of this forging distortion state blank 3 reaches more than 40%, and the area of the maximum radial section 3-1 of this radial forging distortion state blank 3 slightly larger than the area of maximum radial section 5-2 of the undercarriage urceolus forging forming part 5 needing to shape time, namely radial forging is completed；Finally, the state blank 3 that radial forging distorted carries out Quenching Treatment；
3) secondary remelting: by step 2) in the radial forging through Quenching Treatment that the obtains state blank 3 that distorts put in electric furnace or Medium Frequency Induction Heating Furnace and be heated and isothermal holding, and control in the semi-solid temperature interval range that heating-up temperature is metal bar material 1, temperature retention time is 5～30min, and has the undercarriage urceolus forging semi-solid blank 4 of microstructure tiny, uniform, spherical between 40%～60% obtaining fraction solid；
4) semisolid Integral die-forged shapes: by step 3) the undercarriage urceolus forging semi-solid blank 4 that obtains puts into the mold cavity that semisolid die forging shapes, and adopts semisolid die forging process forming to go out undercarriage urceolus forging forming part 5.
Claims (1)
1. undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique, it is characterised in that comprise the following steps:
1) bar preliminary deformation: be first ready for the unimach of forming aircraft undercarriage urceolus forging or the metal bar material (1) of titanium alloy material；Then metal bar material (1) preheated and carry out jumping-up repeatedly, pulling, to obtain distortion state metal bar material (2) of storage distortional strain energy；
2) bar radial forging: utilize waste heat to step 1) in distortion state metal bar material (2) that obtains carry out radial forging to obtain radial forging distortion state blank (3)；
3) secondary remelting: by step 2) in the radial forging through Quenching Treatment that the obtains state blank (3) that distorts put into and electric furnace be heated and isothermal holding, and control in the semi-solid temperature interval range that heating-up temperature is metal bar material (1), temperature retention time is 5～30min, and has undercarriage urceolus forging semi-solid blank (4) of microstructure tiny, uniform, spherical between 40%～60% obtaining fraction solid；
4) semisolid Integral die-forged shapes: by step 3) undercarriage urceolus forging semi-solid blank (4) that obtains puts into the mold cavity that semisolid die forging shapes, and adopts semisolid die forging process forming to go out undercarriage urceolus forging forming part (5).
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| CN201510064322.7A CN104668417B (en) | 2015-02-06 | 2015-02-06 | Undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique |
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| CN201510064322.7A CN104668417B (en) | 2015-02-06 | 2015-02-06 | Undercarriage urceolus forging radial forging formula strain-induced semisolid die forging technique |
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| CN104668417A CN104668417A (en) | 2015-06-03 |
| CN104668417B true CN104668417B (en) | 2016-06-29 |
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Families Citing this family (11)
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| CN105149869B (en) * | 2015-07-30 | 2017-07-14 | 西安交通大学 | The cross wedge rolling formula strain-induced semisolid die forging technique of internal combustion engine high-pressure common-rail pipe |
| RU2636610C2 (en) * | 2015-11-02 | 2017-11-24 | Общество с ограниченной ответственностью Научно-производственное предприятие "МЕТЧИВ" (ООО НПП "МЕТЧИВ") | Method of radial forging |
| CN106378403A (en) * | 2016-08-31 | 2017-02-08 | 无锡派克新材料科技股份有限公司 | Switching section molding method |
| CN106363363A (en) * | 2016-11-12 | 2017-02-01 | 湘潭大学 | Semi-solid thixo-forging forming technology for steel impeller |
| CN106435128A (en) * | 2016-11-12 | 2017-02-22 | 湘潭大学 | Preparation method for semi-solid state blank of steel |
| CN107350754B (en) * | 2017-09-12 | 2020-03-31 | 中航飞机起落架有限责任公司 | Processing method of outer barrel with inclined annular groove |
| CN109622842B (en) * | 2018-12-11 | 2021-04-20 | 陕西宏远航空锻造有限责任公司 | Forging method and device for controlling die forging warping of long-rod forge piece |
| CN112124571B (en) * | 2020-09-10 | 2023-07-21 | 中国航空工业集团公司沈阳飞机设计研究所 | Outer cylinder of aircraft landing gear, manufacturing method and aircraft landing gear |
| CN112453299B (en) * | 2020-11-06 | 2022-01-11 | 西安交通大学 | Strain-induced semi-solid multi-point die forming process for aerospace titanium alloy sheet |
| CN116638036A (en) * | 2021-04-07 | 2023-08-25 | 陕西斯坦特生物科技有限公司 | Radial forging blank making method and system for hip joint handle forge piece based on radial forging hammer |
| CN114260404B (en) * | 2021-12-22 | 2023-11-28 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Landing gear outer cylinder rough blank and short-process manufacturing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03297530A (en) * | 1990-04-17 | 1991-12-27 | Kawasaki Steel Corp | Manufacture of forged steel for hot press tool |
| KR101768027B1 (en) * | 2009-07-04 | 2017-08-30 | 인덕터히트 인코포레이티드. | Application of electric induction energy for manufacture of irregularly shaped shafts with cylindrical components including non-unitarily forged crankshafts and camshafts |
| CN102107255B (en) * | 2010-12-20 | 2012-11-14 | 沈阳黎明航空发动机(集团)有限责任公司 | Die forging forming method of basin-shaped blank |
| CN103706743B (en) * | 2013-12-12 | 2017-02-01 | 无锡透平叶片有限公司 | Die-forging forming process of titanium-alloy forged drum piece |
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