CN104259376B - The paired hot-forging forming process of AT rail heel end die mould section - Google Patents
The paired hot-forging forming process of AT rail heel end die mould section Download PDFInfo
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- CN104259376B CN104259376B CN201410381501.9A CN201410381501A CN104259376B CN 104259376 B CN104259376 B CN 104259376B CN 201410381501 A CN201410381501 A CN 201410381501A CN 104259376 B CN104259376 B CN 104259376B
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Abstract
The invention discloses a kind of AT rail paired heel end die mould section hot-forging forming process, belong to railway equipment and manufacture field.AT rail paired heel end die mould section hot-forging forming process, forging molding is carried out to rail medium position, one-shot forming goes out two changeover portions and one and lengthens profiled section, and be then that two standards forge heel ends by forging and stamping section by middle part sawing, once forging two pieces is shaping.Novel heel end Forging Technology of the present invention achieves the one-mold multiple-member of heel end forging, improves heel end forging production efficiency, significantly reduces production cost and the energy consumption of single heel end; Novel heel end process for forging project organization is reasonable, simple and practical, and highly versatile is convenient for installation and maintenance, remarkable in economical benefits, is applicable to the forging of railroad turnout steel rail heel end, can be widely used in shaping or forging field, local, various end.
Description
Technical field
The present invention relates to railway equipment and manufacture field, specifically, relate to the process of the paired hot-forging forming of a kind of AT rail.
Background technology
In the production of railway switch, dwarf forms special section frog end (being commonly called as AT rail) is needed to be configured as standard section rail by forge hot mode, or a kind of standard gauge section is shaped to another kind of rail profile, connects for use in standard section steel rail on circuit.The rail product that this need carry out end of rail forging molding is referred to as forging heel end or die mould heel end.Its version is mainly divided into former material section Z, profiled section M, changeover portion P, and according to different product, its rail part total length L, former material section type, profiled section type, transition section length, shaping segment lenght etc. all can change, as shown in Figure 1.
The main production process of existing AT rail pressure type heel end is sawing after blanking, heating, forging, heat treatment after forging, rectification, the machined of rail part, assembling.For a long time, the heats forged of end of rail is the difficult point of such rail part processing always.
With regard to rail heel end forging both at home and abroad at present, mainly contain two kinds of modes, be respectively the forging and stamping of loose piece class mould and three stations or multi-station mold and forge and press, but in any shape, all can only carry out single single heating, single single forging.The impact of the factors such as production efficiency is low, energy resource consumption is large, equipment scale is huge makes rail heel end forge and forms more serious restriction to track switch production, also the production cost of rail heel end forging is considerably increased on the other hand, each manufacturing firm drops into the research of technique that a large amount of manpower and materials carry out heel end forging one after another, in the hope of continuing to optimize technique, improve heel end production efficiency, reduce manufacturing cost.
Summary of the invention
1, the technical problem that will solve is invented
The unfavorable factors such as the productivity ratio of the mode of production of single single is low, energy resource consumption is large, equipment loss is strong, production cost is high are forged in order to overcome heel end of the prior art, the invention provides one can effectively enhance productivity, reduce energy resource consumption, reduce equipment loss, reduce production cost, for enterprise creates the AT rail paired heel end die mould section hot-forging forming process of new profit growth point.
2, technical scheme
For achieving the above object, the present invention adopts following technical scheme:
AT rail paired heel end die mould section hot-forging forming process, the heel end forging mode of paired hot-forging forming carries out forging molding to certain position in the middle part of rail, one-shot forming goes out two changeover portions and a lengthening profiled section, subsequently the heel end of paired hot-forging forming being forged and pressed section is that two standards forge heel ends by middle part sawing, reach and once forge the shaping object of two pieces, production efficiency can double, and energy resource consumption reduces by 50%, and production cost falls 50% on a year-on-year basis.
The heel end structure of paired hot-forging forming is still divided into former material section, changeover portion, profiled section version, but itself and original heel end structure are different, the main distinction is that the heel end structure of a paired hot-forging forming is that the set of original two standard heel ends forms, and the heel end concrete form of paired hot-forging forming will require to change according to product and former material difference.
After the heating of Rail part, a fiery blocking lifts the web of the rail, smooth profile curvature larger portion position; Two fiery finish-forgings, shaping forging, forms the flange of rail and rail head amount of machining, discharges excess metal; Subsequently heat treatment after forging is carried out to forging, carry out basis for follow-up heel end machined and finished heat treatment and prepare.
Paired hot-forging forming heel end die forging tool adopts using complex blocks and three station modular, two kinds of mould patterns, is respectively Preform Die combination, finish-forging die combination, two pyrogene types, a fire preparing embryo, two fiery shapings.Rail part adopts intermediate-frequency heating furnace to heat, and workpiece initial forging temperature is 1150 ± 50 DEG C, and final forging temperature is 850 ± 50 DEG C.
For meeting the requirement of this technical process, needing supporting corresponding process layout, forging press and other heel end accessory processing equipment, the paired die mould section forging and stamping section processing technology requirement of rail any part can be applicable to.As forcing press can carry out the hitch feed of rail part at two ends, plant building need have that sufficient space holds rail extension, heating furnace can allow rail part passes through burner hearth, rail sawing machine can meet novel heel end sawing on the basis meeting the heating of rail part, heat treatment after forging etc. is carried out in heat treatment after forging energy tracking part optional position.
The heel end forging method of paired hot-forging forming will change the former material cutting mode of traditional rail, be different from the single location of single calculating, the position location of paired hot-forging forming heel end will be carried out burdening calculation according to product general plan and be determined, all can meet Product processing length tolerance with two sections of rail after the heel end sawing ensureing paired hot-forging forming, make the utilization rate of the former material of rail reach reasonable interval simultaneously.
The handling of paired hot-forging forming heel end will adopt Novel rail part handling method, adopt two ends multiple spot handling principle, ensure that forging and stamping section rail does not bend in part moving process in-orbit, torsional deformation.
3, beneficial effect
Adopt technical scheme provided by the invention, compared with existing known technology, there is following remarkable result:
(1) The inventive method achieves the one-mold multiple-member of heel end forging, improve heel end forging production efficiency, significantly reduce production cost and the energy consumption of single heel end;
(2) The inventive method achieves the existing railroad turnout steel rail part heel end forging production efficiency of lifting, reduce energy consumption, improve heel end output, reduce heel end forging cost, improve the object of track switch enterprise rail part heel end production economy benefit;
(3) novel heel end process for forging project organization is reasonable, simple and practical, and highly versatile is convenient for installation and maintenance, remarkable in economical benefits, is applicable to the forging of railroad turnout steel rail heel end, can be widely used in shaping or forging field, local, various end.
Accompanying drawing explanation
Fig. 1 is die mould heel end version schematic diagram;
Fig. 2 is novel heel end version schematic diagram;
Fig. 3 is AB integrated positioning length schematic diagram in embodiment;
Fig. 4 is CD integrated positioning length schematic diagram in embodiment.
In figure: 1, former material section, 2, changeover portion, 3, profiled section, 4, sawing mouth, 5, former material section, 6, profiled section section.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention is further detailed explanation.
Embodiment
The paired hot-forging forming process of AT rail, new heel end forging mode is that certain position carries out forging molding in the middle part of rail, one-shot forming goes out two each and every one changeover portions and a lengthening profiled section, be that two standards forge heel ends by forging and stamping section by middle part sawing subsequently, reach and once forge the shaping object of two pieces, production efficiency can double, and energy resource consumption reduces by 50%, and production cost falls 50% on a year-on-year basis;
The heel end structure of paired hot-forging forming is still divided into former material section, changeover portion, profiled section version, but itself and original standard heel end structure are different, the main distinction is that the heel end structure of 1 paired hot-forging forming is that original two each and every one heel end set form, as shown in Figure 2, the heel end concrete form of paired hot-forging forming will require to change according to product and former material difference its structural shape.
After the heating of Rail part, a fiery blocking lifts the web of the rail, smooth profile curvature larger portion position; Two fiery finish-forgings, shaping forging, forms the flange of rail and rail head amount of machining, discharges excess metal; Subsequently heat treatment after forging is carried out to forging, carry out basis for follow-up heel end machined and finished heat treatment and prepare.
Paired hot-forging forming heel end die forging tool adopts using complex blocks and three station modular, two kinds of mould patterns, is respectively Preform Die combination, finish-forging die combination, two pyrogene types, a fire preparing embryo, two fiery shapings.Rail part adopts intermediate-frequency heating furnace to heat, and workpiece initial forging temperature is 1150 ± 50 DEG C, and final forging temperature is 850 ± 50 DEG C.
The forging method of the paired hot-forging forming of rail heel end will change the former material cutting mode of traditional rail, be different from the single location of single calculating, new heel end position location will be carried out burdening calculation according to product general plan and be determined, all can meet Product processing length tolerance with two sections of rail after the heel end sawing ensureing paired hot-forging forming, make the utilization rate of the former material of rail reach reasonable interval simultaneously.
As shown in Figure 3 and Figure 4, the locate mode of heel end illustrates with 60AT-60 standard (changeover portion 150mm+ profiled section 450mm) heel end: former material length of 60AT 25 meters, product A length 15 meters, product B length 10 meters; Products C length 8 meters, product D length 17 meters;
AB, CD are combined respectively during production department's batching, such stock utilization is high, and simultaneously because heel end is all identical, the forging segment length of the former material of every root is 150+450+150+450=1200mm;
And this forge length is different in the present position of 25 meters of former materials, according to product mix, AB integrated positioning benchmark L1 is 14.4 meters, and the positioning datum L2 of CD combination is 16.4 meters.
According to product actual size determination heel end position location, in AB integrated positioning length schematic diagram, see Fig. 3,15000 and 10000 mid portions are the position of hot-forging forming heel end sawing mouth in pairs after forging, heel end after correcting, respectively with termination, two ends for benchmark respectively measures 15000mm and 10000mm, and to rule respectively in the heel end position of corresponding length, finally carry out sawing along scribing position, form two heel ends.
The novel heel end Forging Technology of the present invention achieves the one-mold multiple-member of heel end forging, improves heel end forging production efficiency, significantly reduces production cost and the energy consumption of single heel end; Novel heel end process for forging project organization is reasonable, simple and practical, and highly versatile is convenient for installation and maintenance, remarkable in economical benefits, is applicable to the forging of railroad turnout steel rail heel end, can be widely used in shaping or forging field, local, various end.
Claims (5)
1.AT rail paired heel end die mould section hot-forging forming process, it is characterized in that: forging molding is carried out to rail medium position, one-shot forming goes out two changeover portions and one and lengthens profiled section, and be then that two standards forge heel ends by forging and stamping section by middle part sawing, once forging two pieces is shaping.
2. AT rail paired heel end die mould section hot-forging forming process as claimed in claim 1, it is characterized in that: after the heating of Rail part, first first time heating (under be called a fire) blocking lifts the web of the rail, smooth profile curvature larger portion position, and workpiece blocking temperature is 1150 ± 50 DEG C; Then second time heating (under be called two fire) finish-forging, final forging temperature is 850 ± 50 DEG C, shaping forging, forms the flange of rail and rail head amount of machining, discharges excess metal; Finally heat treatment after forging is carried out to forging, carry out basis for follow-up heel end machined and finished heat treatment and prepare.
3. AT rail paired heel end die mould section hot-forging forming process as claimed in claim 1, it is characterized in that: the die forging tool of hot-forging forming heel end adopts the combining form of using complex blocks mould or three station modular moulds or two kinds of moulds in pairs, be respectively Preform Die combination, finish-forging die combination, two pyrogene types, one fire preparing base, two fiery shapings, rail part adopts intermediate-frequency heating furnace to heat.
4. AT rail paired heel end die mould section hot-forging forming process as claimed in claim 1, it is characterized in that: the handling of hot-forging forming heel end will adopt rail part handling method in pairs, adopt two ends multiple spot handling principle, ensure that forging and stamping section rail does not bend in part moving process in-orbit, torsional deformation.
5. AT rail paired heel end die mould section hot-forging forming process as claimed in claim 1, is characterized in that: hot-forging forming heel end structure is divided into former material section, changeover portion, profiled section version in pairs.
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| CN201410381501.9A CN104259376B (en) | 2014-08-05 | 2014-08-05 | The paired hot-forging forming process of AT rail heel end die mould section |
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| CN201410381501.9A CN104259376B (en) | 2014-08-05 | 2014-08-05 | The paired hot-forging forming process of AT rail heel end die mould section |
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| CN104259376B true CN104259376B (en) | 2016-02-03 |
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| CN107175305A (en) * | 2017-06-19 | 2017-09-19 | 铁科（北京）轨道装备技术有限公司 | A kind of heavily loaded track switch heel end forging method |
| CN108914722A (en) * | 2018-09-21 | 2018-11-30 | 芜湖中铁科吉富轨道有限公司 | A kind of modified groove profile rail compromise joint and its processing method |
| CN113953433A (en) * | 2021-10-19 | 2022-01-21 | 中国铁建重工集团股份有限公司道岔分公司 | Universal special-shaped rail forging die and application thereof |
| CN116237451B (en) * | 2023-05-11 | 2023-07-18 | 无锡市雪浪合金科技有限公司 | Forging forming and processing device and processing method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE828792C (en) * | 1949-05-07 | 1952-01-21 | Oesterr Alpine Montan | Process for re-forging asymmetrical, thick-web rail profiles into rail profiles of greater height |
| AT412351B (en) * | 2002-04-04 | 2005-01-25 | Vae Eisenbahnsysteme Gmbh | TRANSITION RAIL AND METHOD FOR PRODUCING THIS TRANSITION RAIL |
| CN101229572B (en) * | 2008-02-26 | 2010-12-29 | 中铁宝桥股份有限公司 | Moulding technology of tongue rail heeling of heavy haul railway |
| CN101912945B (en) * | 2010-07-29 | 2012-04-18 | 中国铁建重工集团有限公司道岔分公司 | Method for forging and pressing heel of AT steel rail |
| CN103920840B (en) * | 2014-04-19 | 2016-05-11 | 山东远大特材科技股份有限公司 | Two forging molds of railroad track track gauge block one mould |
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