CN103962487A - Large-scale solid-forging metal framework with lugs and manufacturing method thereof - Google Patents
Large-scale solid-forging metal framework with lugs and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to a large-scale solid-forging metal framework with lugs and a manufacturing method thereof. The manufacturing method is particularly suitable for materials like titanium alloy which is hard to deform. The manufacturing method comprises the steps of (1) blank making, (2) pre-forging, (3) pre-forging blank finishing, (4) die forging forming of final forging pieces, and therefore the large-scale solid-forging metal framework with the lugs is obtained. The V-shaped waste blank design method is adopted, a cavity can be well filled, the problem that a forge piece of the large-scale metal framework with the lugs is difficult to form is solved, the manufacturing of a V-shaped waste blank is simple, and the forming effect is good. The forge pieces are mainly applied to the industrial fields like aviation, aerospace and petrochemical engineering.
Description
Technical field
The present invention relates to a kind of large-scale integral forging metal framework and technology of preparing thereof, be particularly related to large-scale integral forging metal framework with ear piece and preparation method thereof, be particularly useful for titanium alloy large-sized member preparation, also can be applicable to aluminium alloy or other materials high to overall performance requirement, belong to materials science field.
Background technology
Forging is that metal is applied in pressure, is moulded and is obtained the shape that requires or the object of suitable compression stress by plastic deformation.Metal can improve its institutional framework and mechanical property after forging processing, forge and process the continuity that can ensure metal fibrous tissue, fibr tissue and the forging profile of forging are consistent, and metal streamline is complete, can ensure that forging parts has the service life of good mechanical property and length.Cast sturcture after forging method thermal processing distortion due to distortion and the recrystallization of metal, make original large dendritic crystal and columnar grain become the axle recrystallized structures such as crystal grain is thinner, of uniform size, make compacting and the seam such as original segregation in ingot casting, loose, pore, slag inclusion, its tissue becomes tightr, has improved plasticity and the mechanical property of metal.Forging is without any porous, redundant space, inclusion or other flaw.The part that this method is produced, intensity and weight ratio have a high ratio.So forging is used in aircaft configuration conventionally.
Calculate by weight, on aircraft, have 85% left and right member be forging.The inside and outside cylindrical shell of the spar of the turbine disk of aircraft engine, rear axle journal (hollow shaft), blade, wing, the rib plate of fuselage, wheel support, undercarriage etc. all relates to the important forging of aircraft safety.The precious materials manufactures such as the multiplex high-strength abrasion-proof of aircraft forging, anti-corrosion aluminium alloy, titanium alloy, nickel-base alloy.Forging, especially large-scale framework forging are in engineering field extensive uses such as Aeronautics and Astronautics.Fuselage that is used for aircraft as large-scale framework forging etc. is located, and its dimensions is generally and is greater than 1 meter.
Traditional large-scale frame class method for manufacturing parts is to adopt some Forging Pieces to be welded, and needs multiple operations such as welding, machined, Non-Destructive Testing, heat treatment and repeatedly just can complete in member manufacture process, and the process-cycle is long, quality stability is not high.Meanwhile, due to the heterogeneous feature of weld seam, weld seam periphery corrosion-resistant, structural safety reliability are low, therefore, maximize, integration is one of forging development trend.
But along with forging increases, how to keep the uniformity of structure property to become again technological difficulties.Require the high-quality of forging structure property and homogenising must first require the tiny and even tissue of the crystal grain of forging stock, to ensure forging quality, first must guarantee forging stock quality, in other words, before forging forming, just forging stock structure property need be reached to the level of forging after being shaped.
In the maximization integration process of forging, for symmetrical or near symmetrical frame shape, can suppress or expanding method is prepared from by biscuit.But for band ear piece or asymmetrical large-scale integral frame, typical frame as large-scale in aviation component, its contour dimension is greater than 1m × 1m, such as 1528mm × 1352mm.Because upper end and right-hand member have " the ear piece " that stretch out, there is the hole of diameter 1m in heart portion, adopts conventional biscuit compacting or the forging method of reaming, and ear piece etc. is located to occur " misrun " to be not fully filled phenomenon.
Prior art cannot solve the forging of the large-scale integral frame member with ear piece always, once occurs the manufacture method of asymmetric part in prior art, but the means of the technical problem solving from the present invention and employing are completely different.
Once there is the mode of the open integral extrusion forming of document, but adopted extrusion process, and needed first extrusion billet to be cut into the different inclined-plane of thickness, then regulate gap to obtain Non-symmetric Extrusion part.Known in this field, Forging Technology force and deformation mode is larger with extruding difference, and for large component, metal that resistance of deformation is large, fashion of extrusion is not applicable.
" rare metal ", in May, 2012, the 36th the 2nd phase of volume, article " titanium alloy complex member Study on Isothermal Forging Process " discloses a kind of method that isothermal forging is prepared complex component, but the frame class part problem solving from the present invention is different, first blank design difference, secondly in article, forging forming need to be aided with machined forging is carried out to thickness processing, and the present invention only adopts forging method.The problem that above-mentioned two documents and the present invention solve in a word and the means of employing all do not have comparativity.
The object of the invention is to solve blank design, forging stock preparation, forging forming problem with ear piece entirety frame.Adopt with the waste base of the corresponding wide-angle V-arrangement of ear piece angle and forge, solved the forging and molding problem of above-mentioned large-scale integral forging; Further, by the waste base of V-arrangement is carried out to isothermal base, isothermal forging, solved better Accurate Shaping and the structure property homogeneity question of above-mentioned large-scale integral forging.Adopt the inventive method only can complete whole forging forming process by 2～3 fire, greatly shortened operation, improved stock utilization.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of band ear piece large-scale integral forging metal framework and preparation method thereof, wherein, framework one forging and molding, without sectional making; Further, having good uniformity of this framework global tissue performance.
By the method for V-arrangement blank design, can address the above problem well.
Further, adopt congruent warm working (the pre-forging stock+isothermal of isothermal finish-forging part) for V-arrangement blank, making large-scale integral forge framework can Accurate Shaping, has good structure property uniformity.
In order to solve aforementioned technical problem, reach above-mentioned technique effect, the invention provides following technical scheme:
With a large-scale integral forging metal framework for ear piece, wherein, framework contour dimension is greater than 1m × 1m, and whole framework one forging and molding, without reaming and sectional making.
In addition, the present invention also provides a kind of preparation method of the large-scale integral forging metal framework with ear piece, comprises the following steps:
(1) the waste base base of V-arrangement: blanking, obtain the slab of even thickness, prepare the waste base of V-arrangement by exerting pressure on slab, pressure-acting is in the bottom corresponding to V-arrangement, wherein, angle and the development length of the waste base of V-arrangement are determined by the angle between ear piece and size.
(2) the waste base blocking of V-arrangement: the waste base of the V-arrangement making is put into mould and forge, the extension edge of the waste base of V-arrangement is corresponding to the ear piece of framework; After forging, the extension edge of the waste base of V-arrangement forms ear piece part, and remainder forms chassis body.
(3) pre-forging stock finishing: the hole portion material that removes pre-forging stock middle part.
(4) whole die forging shaping: the frame mold of putting into final shaping is forged, obtains the large-scale integral forging metal framework with ear piece.The large-scale integral forging metal framework with ear piece being made by said method, framework one forging and molding, without reaming and sectional making.
In order to obtain better structure property, preferably, waste described V-arrangement base can be realized to the reasonable distribution of metal by 20～40 DEG C of isothermal blockings below transformation temperature T β, formative tissue performance is the large-scale outling of truss with ear piece uniformly.
More preferably, the pre-forging stock after finishing obtains accurate finish-forging part by forcing press 20～40 DEG C of isothermal die forging process below transformation temperature T β; Further preferably, isothermal forging mould processes with the casting of K3 high temperature alloy.
Preferably, original material is bar, blanking after bar upsetting pull is obtained to the slab of even thickness, prepares the waste base of V-arrangement by exerting pressure on slab, when hydraulic press upsetting pull blank, every fiery deflection is 30～50%, or every fiery deflection is controlled at 15～40% in the time of open die forging upsetting pull blank.Preferably, base temperature is controlled at following 25～40 DEG C of transformation temperature T β when upsetting pull blank.
More preferably, air-cooled after described whole forging forming, then, finish-forging part Technology for Heating Processing is common annealing, air cooling.
Preferably, metal can be aluminium alloy, titanium alloy or nickel-base alloy etc.
Compared with prior art (Forging Pieces welding or reaming), beneficial effect of the present invention is as follows:
Prior art adopts some Forging Pieces to be welded to the manufacture method of the large-scale FRAME COMPONENTS of this class, in member manufacture process, need multiple operations such as welding, machined, Non-Destructive Testing, heat treatment and repeat above operation just can complete, the process-cycle is long, quality stability is not high.Reaming can only the never manufacture of the symmetry framework with ear piece of solution.The present invention has broken through the multinomial key technology that becomes shape forging with the large complicated whole frame of ear piece, reach the technical conditions of fine forge piece, Accurate Shaping and the structure property homogeneity question of above-mentioned large-scale integral forging are solved, only can complete whole forging forming process by 2～3 fire, greatly shorten operation, improved stock utilization.
Brief description of the drawings
Fig. 1 is the waste base of the V-arrangement of the large-scale metal solid forging framework with ear piece.
Fig. 2 is the pre-forging stock shape of the large-scale metal solid forging framework with ear piece.
Fig. 3 is the pre-forging after the finishing of the large-scale metal solid forging framework with ear piece.
Fig. 4 is the finish-forging part net shape of the large-scale metal solid forging framework with ear piece.
Detailed description of the invention
Below the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein, only for description and interpretation the present invention, is not intended to limit the present invention.
Below in conjunction with brief description of the drawings one embodiment of the present of invention.Framework contour dimension 1528mm × 1352mm.The preparation method of the titanium alloy large-sized framework die forging of the TA15 member of upper end and right-hand member band ear piece is as follows:
(1) the waste base base of V-arrangement: the bar of selecting diameter of phi 400mm, after upsetting pull, blanking obtains the slab of even thickness, prepare the waste base of V-arrangement by exerting pressure on slab, pressure-acting is in the bottom corresponding to V-arrangement, wherein, angle and the size between angle and development length and the ear piece of the waste base of V-arrangement is corresponding.Upsetting pull blank adopts open die forging, on 5 tons of flat-die hammers, carries out.Or upsetting pull blank adopts 50MN hydraulic press to carry out.The base temperature of upsetting pull blank is controlled at 960 DEG C, and transformation temperature is 990 DEG C.First prepare the waste base of V-arrangement.
(2) the waste base blocking of V-arrangement: the waste base of the V-arrangement making is put into mould and forge, the extension edge of the waste base of V-arrangement is corresponding to the ear piece of framework; After forging, the extension edge of the waste base of V-arrangement forms ear piece part, and remainder forms chassis body.The waste base of V-arrangement, again by 965 DEG C of blockings, is realized the reasonable distribution of metal, forms the large-scale outling of truss with ear piece, without reaming and sectional making.
(3) pre-forging stock finishing: the hole portion material that removes pre-forging stock middle part.
(4) whole die forging shaping: the frame mold of putting into final shaping is forged, obtains the large-scale integral forging metal framework with ear piece.Isothermal forging mould processes with the casting of K3 high temperature alloy, and isothermal temperature is still at 965 DEG C, and die forging obtains accurate finish-forging part, heat-treats subsequently.
Finally it should be noted that: the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although the present invention is had been described in detail with reference to previous embodiment, for a person skilled in the art, its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. the large-scale integral forging metal framework with ear piece, is characterized in that: this framework is with integrally formed ear piece, and whole framework one forging and molding, without reaming and sectional making.
2. a preparation method for the large-scale integral forging metal framework with ear piece, is characterized in that, this framework, with integrally formed ear piece, comprises the following steps:
(1) base: blanking, obtains the slab of even thickness;
(2) blocking: the waste base making is put into mould and forge and obtain pre-forging stock;
(3) pre-forging stock finishing: the hole portion material that removes pre-forging stock middle part;
(4) whole die forging shaping: put into frame mold and carry out forging and molding, obtain the large-scale integral forging metal framework with ear piece, whole framework one forging and molding.
3. the preparation method of a kind of large-scale integral forging metal framework with ear piece according to claim 2, is characterized in that, base is for making the waste base of V-arrangement; Step (1), (2) are specially:
(1) the waste base base of V-arrangement: blanking, obtain the slab of even thickness, prepare the waste base of V-arrangement by exerting pressure on slab, pressure-acting is in the bottom corresponding to V-arrangement, wherein, angle and the development length of the waste base of V-arrangement are determined by the angle between ear piece and size;
(2) the waste base blocking of V-arrangement: the waste base of the V-arrangement making is put into mould and forge, the extension edge of the waste base of V-arrangement is corresponding to the ear piece of large-scale integral forging metal framework; After forging, the extension edge of the waste base of V-arrangement forms ear piece part, and remainder forms large-scale integral forging metal chassis body.
4. the preparation method of a kind of large-scale integral forging metal framework with ear piece according to claim 3, is characterized in that, waste V-arrangement base is carried out to isothermal blocking; Preferably, realize the reasonable distribution of metal by 20～40 DEG C of isothermal blockings below transformation temperature T β, formative tissue performance is the large-scale outling of truss with ear piece uniformly.
5. according to the preparation method of the arbitrary described a kind of large-scale integral forging metal framework with ear piece of claim 2-4, it is characterized in that, the pre-forging stock after finishing obtains accurate finish-forging part by isothermal die forging process; Preferably, the pre-forging stock after finishing obtains accurate finish-forging part by 20～40 DEG C of isothermal die forging process below transformation temperature T β; Further preferably, isothermal forging mould therefor processes with the casting of K3 high temperature alloy.
6. according to the preparation method of the arbitrary described a kind of large-scale integral forging metal framework with ear piece of claim 2-5, it is characterized in that, original material is bar, blanking after bar upsetting pull is obtained to the slab of even thickness, prepares the waste base of V-arrangement by exerting pressure on slab; Preferably, upsetting pull blank carries out on hydraulic press or flat-die hammer; More preferably, when hydraulic press upsetting pull blank, every fiery deflection is 30～50%, or every fiery deflection is controlled at 15～40% in the time of open die forging upsetting pull blank.
7. according to the preparation method of the arbitrary described a kind of large-scale integral forging metal framework with ear piece of claim 2-6, it is characterized in that, when upsetting pull blank, base temperature is controlled at following 25～40 DEG C of transformation temperature T β.
8. according to the preparation method of the arbitrary described a kind of large-scale integral forging metal framework with ear piece of claim 2-7, it is characterized in that, air-cooled after described whole forging forming, then, finish-forging part Technology for Heating Processing is common annealing, air cooling.
9. according to the preparation method of the arbitrary described a kind of large-scale integral forging metal framework with ear piece of claim 2-8, it is characterized in that, metal can be aluminium alloy, titanium alloy or nickel-base alloy etc.
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| CN104525810A (en) * | 2014-12-22 | 2015-04-22 | 西安西工大超晶科技发展有限责任公司 | Titanium alloy forging semi-hot state precision die forging forming process |
| CN105215245A (en) * | 2015-10-16 | 2016-01-06 | 西安三角航空科技有限责任公司 | A kind of forging method of ultra-large type whole titanium alloy frame forging |
| CN105728612A (en) * | 2014-12-12 | 2016-07-06 | 陕西宏远航空锻造有限责任公司 | Forging method of large titanium alloy frame class precision forge piece for aviation aircraft |
| CN108526365A (en) * | 2018-05-30 | 2018-09-14 | 西安三角防务股份有限公司 | A kind of forging forming method of large titanium alloy center piece |
| CN109317590A (en) * | 2018-10-16 | 2019-02-12 | 中国航发南方工业有限公司 | The forming method of Complex Aluminum Alloy casing forging |
| CN109570417A (en) * | 2018-11-23 | 2019-04-05 | 哈尔滨工业大学 | A kind of accurate forming method of aluminium alloy thin-walled curved surface muscle forging |
| CN111804885A (en) * | 2020-07-09 | 2020-10-23 | 科曼车辆部件系统(苏州)有限公司 | Liquid die forging forming process for aluminum alloy automobile hub |
| CN112496217A (en) * | 2020-11-16 | 2021-03-16 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Integral forming method for high-temperature titanium alloy frame die forging |
| CN113000756A (en) * | 2019-12-19 | 2021-06-22 | 宝武特种冶金有限公司 | Isothermal forging method of titanium alloy case forging |
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| CN113000756A (en) * | 2019-12-19 | 2021-06-22 | 宝武特种冶金有限公司 | Isothermal forging method of titanium alloy case forging |
| CN111804885A (en) * | 2020-07-09 | 2020-10-23 | 科曼车辆部件系统(苏州)有限公司 | Liquid die forging forming process for aluminum alloy automobile hub |
| CN112496217A (en) * | 2020-11-16 | 2021-03-16 | 中国第二重型机械集团德阳万航模锻有限责任公司 | Integral forming method for high-temperature titanium alloy frame die forging |
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Address after: 100095 Beijing 81 Mailbox Patentee after: China Hangfa Beijing Institute of Aerial Materials Address before: 100095 Beijing No. 81 Mailbox Patentee before: Beijing Institute of Aeronautical Materials, China Aviation Industry Group Corporation |