CN101229572A - Moulding technology of tongue rail heeling of heavy haul railway - Google Patents
Moulding technology of tongue rail heeling of heavy haul railway Download PDFInfo
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- CN101229572A CN101229572A CNA2008100175602A CN200810017560A CN101229572A CN 101229572 A CN101229572 A CN 101229572A CN A2008100175602 A CNA2008100175602 A CN A2008100175602A CN 200810017560 A CN200810017560 A CN 200810017560A CN 101229572 A CN101229572 A CN 101229572A
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Abstract
The invention relates to a heel of switch rail molding technique used in heavy haul railways, which consists of a dummying process and a final forging process. The dummying process is twice processed: a first time is that the rail is put into a heating furnace for heating. After taken out of the furnace, the rail is laterally positioned in a sealed forming module to process a first dummying; and the rail is then heated in the furnace again. After taken out of the furnace, the rail is positioned in the sealed forming module to process a second dummying; the final forging process is that the rail is put into the furnace for the last time. When the surface temperature of the rail is up to 1,080+/-50 DEG C, the rail is taken out from the furnace and is fully shaped by a final forging mold. The dummying process of the invention, by adopting the sealed forming module and a sealed die forge molding method with the lateral positioned rail, completely eliminates the pressing process and eliminates the processes of repeatedly pushing the module. Thus ensuring rational allocation of metal amount and improving labor efficiency. The final forging process adopts original top and bottom mould base and main molds to ensure a plurality of eligible indexes.
Description
Technical field
The invention belongs to railway equipment manufacturing technology field, particularly railway switch accessory technical field.
Background technology
Heavy haul railway track switch is a kind of novel heel end shaped form with the moulding of 75kg/m rail heel end, and this tongue is processed by profiled section and standard rail.Its design is that the rail head central lines with the rail head center line of rail profiled section and mother metal is a principle, the moulding of 75kg/m rail heel of switch rail is to be raw material with 60AT, (two to compressive strain to use three-dimensional compressive stress, one to stretching strain) the direct die mould of particular process means, make heel end be shaped to 75kg/m standard rail by machined then, thereby be connected (welding, gluing or joint bar) with the standard rail on the circuit, see accompanying drawing 3 (heel end schematic diagram).
The following defective of original 75kg/m rail heel end moulding:
A. heel end moulding rail height is on the low side, and the flange of rail does not have amount of machining;
B. the serious misrun of rail head lower jaw;
C. the folded vestige of backfin is rolled in the existence of flange of rail face;
D. flange of rail width does not reach designing requirement (less than normal);
The heel end moulding process that former 60 dwarf forms special section rail are shaped to 60 standard section rail is: heat rail die mould section earlier, suppress then, during compacting, rail stands upside down, operating personnel will be back and forth repeatedly push away mould twice, shove charge is then heated, and once suppresses again, only need the finish-forging mould specifically, be furnished with some auxiliary flange of rail moulds simultaneously, carry out the pressure of rolling repeatedly, make it moulding.
The originally open die forging of the process using of heel of switch rail moulding, its moulding are divided into blocking (laterally roll pressure and vertically roll pressure) and finish-forging, and blocking adopts different moulds to finish respectively with finish-forging.Cause the heavy losses of metal, and cause occurring many defective corners, can not satisfy the designing requirement of product.
Summary of the invention
The present invention seeks to propose the feasible technology of a kind of tongue rail heeling of heavy haul railway moulding, with the high-quality product of production rapidly and efficiently.
Specifically, the objective of the invention is to guarantee the tongue rail heeling of heavy haul railway Forming Quality, the concrete technology of implementing employing, comprise blocking operation and finish-forging operation, its key is that the blocking operation carries out twice, for the first time is with the rail heating furnace of packing into, treats that rail surface heating-up temperature reaches 1050 ± 50 ℃, after coming out of the stove rail is sidelong in the sealing mould and carries out blocking one time, make it to reach the purpose of lifting the web of the rail; And then will adorn the rail stove and be heated to 1050 ± 50 ℃, the back rail of coming out of the stove is placed on and carries out the secondary blocking in the sealing mould and make it to reach web of the rail moulding; Finish-forging is with the last shove charge of rail, treats that the rail surface temperature reaches 1080 ± 50 ℃, comes out of the stove with adopting the finish-forging mould to carry out comprehensive shaping.
The closed die forging that the blocking operation adopts is equipped with corresponding moulding frock simultaneously, and patrix (1-1), counterdie (1-2), rail head block (1-3) and flange of rail block (1-4) form closed loop, guarantees rail one-step forming just.
The finish-forging operation adopts the general shaping frock of finish-forging mould.
The finish-forging operation is for general frock is equipped with finish-forging mould and corresponding frock, comprises rail head mould (2-1), bed die (2-2), left side web of the rail loose piece pattern (2-3) and right side web of the rail loose piece pattern (2-4).
Technology of the present invention can reach following effect:
A. because this design blocking adopts is closed die forging, loss is few, and amount of metal distributes rationally, can guarantee Forming Quality.
B. increase the versatility that large-scale frock is used, reduced the number of times of changing frock repeatedly, improved efficiency.
C. the phenomenon and the flange of rail size phenomenon less than normal of profiled section heel end rail head lower jaw misrun have thoroughly been solved, for follow-up machined leaves sufficient allowance.75kg/m rail heel end Forming Quality has obtained guarantee.
D. by adjusting normalizing process, the length of as far as possible dwindling the heat affected area, strong control " saddle-shape abrasion ".
The present invention program can be used for the heel end moulding of various 75kg/m rail.
Description of drawings
Fig. 1 lays schematic diagram for rail in the blocking operation and mould.
Fig. 2 lays schematic diagram for rail in the finish-forging operation and mould.
Fig. 3 is the heel of switch rail shaping schematic view.
The general shaping frock of Fig. 4 schematic diagram.
The specific embodiment
With length is the PD of 5400mm
3The rail gas heating furnace of packing into treats that rail surface heating-up temperature reaches 1050 ± 50 ℃, come out of the stove with blocking mould and accordingly frock carry out blocking one time, make it to reach the purpose of lifting the web of the rail; And then shove charge is heated to 1050 ± 50 ℃, comes out of the stove and carries out the secondary blocking with secondary blocking mould and corresponding frock, makes it to reach the purpose of web of the rail moulding; Last shove charge treats that the rail surface temperature reaches 1080 ± 50 ℃, comes out of the stove and carries out comprehensive shaping with finish-forging mould and corresponding frock.The Rational flow of metal meets the Mould design requirement, and product quality is qualified.
Moulding scheme of the present invention is divided into blocking and finish-forging, and blocking adopts sealing mould, the closed die forging forming method that adopts rail to be sidelong, completely abolish and roll the pressure operation, also omit all too many levels that push away mould repeatedly, guaranteed the reasonable distribution of amount of metal, improved efficiency.Finish-forging adopts original mould bases up and down and main mould, guarantees that every index is qualified.
The utilization of finish-forging frock has general shaping frock (seeing figure four), and manufacturing and utilization are all more convenient, have also reduced the link of changing large-scale frock repeatedly, and the rail moulding is attractive in appearance, has guaranteed that every index is qualified.
Technical process of the present invention is a kind of special die forging that is based upon on the basis of heel end moulding that former 60 dwarf forms special section rail are shaped to 60 standard section rail, the mode of heating that the rail employing is sidelong and the pressing mode of side pressure, wherein lacked the operation that pushes away mould repeatedly, what also deducted the flange of rail rolls the pressure operation repeatedly, all blocking frocks all are installed on the equipment, this design is to draw close to automation direction gradually, has reduced operating personnel's workload greatly.Final forging mould also has only two, does not need replacing repeatedly.Technology of the present invention has very big use value.
Claims (4)
1. the technology of tongue rail heeling of heavy haul railway moulding, comprise blocking operation and finish-forging operation, it is characterized in that the blocking operation carries out twice, for the first time be with the rail heating furnace of packing into, treat that rail surface heating-up temperature reaches 1050 ± 50 ℃, after coming out of the stove rail is sidelong in the sealing mould and carries out blocking one time, make it to reach the purpose of lifting the web of the rail; And then will adorn the rail stove and be heated to 1050 ± 50 ℃, the back rail of coming out of the stove is placed on and carries out the secondary blocking in the sealing mould and make it to reach web of the rail moulding; Finish-forging is with the last shove charge of rail, treats that the rail surface temperature reaches 1080 ± 50 ℃, comes out of the stove with adopting the finish-forging mould to carry out comprehensive shaping.
2. the technology of tongue rail heeling of heavy haul railway moulding according to claim 1, it is characterized in that the sealing mould that the blocking operation adopts comprises patrix (1-1), counterdie (1-2) and rail head block (1-3), the flange of rail block (1-4) that coincide with the rail web shape, and mutual linking to each other of each assembly surrounds an obturator.
3. the technology of tongue rail heeling of heavy haul railway moulding according to claim 1 is characterized in that the finish-forging operation adopts the general shaping frock of finish-forging mould.
4. the technology of tongue rail heeling of heavy haul railway moulding according to claim 1 is characterized in that the finish-forging operation adopts the finish-forging mould to comprise rail head mould (2-1), bed die (2-2) and the left side web of the rail loose piece pattern (2-3), the right side web of the rail loose piece pattern (2-4) that coincide with the rail web shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100175602A CN101229572B (en) | 2008-02-26 | 2008-02-26 | Moulding technology of tongue rail heeling of heavy haul railway |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100175602A CN101229572B (en) | 2008-02-26 | 2008-02-26 | Moulding technology of tongue rail heeling of heavy haul railway |
Publications (2)
| Publication Number | Publication Date |
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| CN101229572A true CN101229572A (en) | 2008-07-30 |
| CN101229572B CN101229572B (en) | 2010-12-29 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912945A (en) * | 2010-07-29 | 2010-12-15 | 中铁轨道系统集团有限公司道岔分公司 | Method for forging and pressing heel of AT steel rail |
| CN104259376A (en) * | 2014-08-05 | 2015-01-07 | 中铁宝桥（南京）有限公司 | Paired hot forging forming technological method of AT steel rail heel end compression segment |
| CN104439001A (en) * | 2014-11-29 | 2015-03-25 | 无锡透平叶片有限公司 | Larger titanium alloy structural component die-forging forming method |
| 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 |
| CN107186139A (en) * | 2017-07-21 | 2017-09-22 | 贵州航天新力铸锻有限责任公司 | The H profile steel manufacture method of nuclear fusion stack magnet support |
| CN107214283A (en) * | 2017-07-21 | 2017-09-29 | 贵州航天新力铸锻有限责任公司 | The H profile steel manufacture mould of nuclear fusion stack magnet support |
| CN107737863A (en) * | 2017-10-26 | 2018-02-27 | 齐鲁工业大学 | Customization slab method based on forging technology |
| CN108672644A (en) * | 2018-05-04 | 2018-10-19 | 杭州前进锻造有限公司 | The high forging ratio piston seat proceeding closed fine forging method of construction machinery gear box |
| CN109877266A (en) * | 2019-04-10 | 2019-06-14 | 中铁宝桥集团有限公司 | A kind of asymmetric section steel rail upsetting apparatus |
| CN111570691A (en) * | 2020-05-13 | 2020-08-25 | 安徽中志轨道交通装备制造有限公司 | Forging mechanism for continuously forging and pressing switch rail and preparation process of forged and pressed switch rail |
| CN113798430A (en) * | 2021-08-11 | 2021-12-17 | 广东华昌集团有限公司 | Preparation method of steel-aluminum conductor rail based on co-extrusion and conductor rail |
| CN113877979A (en) * | 2021-09-27 | 2022-01-04 | 滦南县兴凯盛金属制品厂 | Production process of I-shaped steel and square column buckle clamping plate |
| CN114083241A (en) * | 2021-11-30 | 2022-02-25 | 重庆凯斯瑞机电设备有限公司 | Forging process of high-strength two-bridge swing arm |
| CN114083241B (en) * | 2021-11-30 | 2024-05-03 | 重庆凯斯瑞机电设备有限公司 | Forging process for high-strength two-bridge swing arm |
-
2008
- 2008-02-26 CN CN2008100175602A patent/CN101229572B/en active Active
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101912945A (en) * | 2010-07-29 | 2010-12-15 | 中铁轨道系统集团有限公司道岔分公司 | Method for forging and pressing heel of AT steel rail |
| 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 |
| CN104259376A (en) * | 2014-08-05 | 2015-01-07 | 中铁宝桥（南京）有限公司 | Paired hot forging forming technological method of AT steel rail heel end compression segment |
| CN104439001A (en) * | 2014-11-29 | 2015-03-25 | 无锡透平叶片有限公司 | Larger titanium alloy structural component die-forging forming method |
| 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 |
| CN107186139B (en) * | 2017-07-21 | 2018-09-18 | 贵州航天新力铸锻有限责任公司 | The H profile steel manufacturing method of nuclear fusion stack magnet support |
| CN107214283A (en) * | 2017-07-21 | 2017-09-29 | 贵州航天新力铸锻有限责任公司 | The H profile steel manufacture mould of nuclear fusion stack magnet support |
| CN107186139A (en) * | 2017-07-21 | 2017-09-22 | 贵州航天新力铸锻有限责任公司 | The H profile steel manufacture method of nuclear fusion stack magnet support |
| CN107737863A (en) * | 2017-10-26 | 2018-02-27 | 齐鲁工业大学 | Customization slab method based on forging technology |
| CN107737863B (en) * | 2017-10-26 | 2019-03-12 | 齐鲁工业大学 | Customization slab method based on forging technology |
| CN108672644A (en) * | 2018-05-04 | 2018-10-19 | 杭州前进锻造有限公司 | The high forging ratio piston seat proceeding closed fine forging method of construction machinery gear box |
| CN108672644B (en) * | 2018-05-04 | 2019-11-19 | 杭州前进锻造有限公司 | The high forging ratio piston seat proceeding closed fine forging method of construction machinery gear box |
| CN109877266A (en) * | 2019-04-10 | 2019-06-14 | 中铁宝桥集团有限公司 | A kind of asymmetric section steel rail upsetting apparatus |
| CN111570691A (en) * | 2020-05-13 | 2020-08-25 | 安徽中志轨道交通装备制造有限公司 | Forging mechanism for continuously forging and pressing switch rail and preparation process of forged and pressed switch rail |
| CN113798430A (en) * | 2021-08-11 | 2021-12-17 | 广东华昌集团有限公司 | Preparation method of steel-aluminum conductor rail based on co-extrusion and conductor rail |
| CN113877979A (en) * | 2021-09-27 | 2022-01-04 | 滦南县兴凯盛金属制品厂 | Production process of I-shaped steel and square column buckle clamping plate |
| CN114083241A (en) * | 2021-11-30 | 2022-02-25 | 重庆凯斯瑞机电设备有限公司 | Forging process of high-strength two-bridge swing arm |
| CN114083241B (en) * | 2021-11-30 | 2024-05-03 | 重庆凯斯瑞机电设备有限公司 | Forging process for high-strength two-bridge swing arm |
Also Published As
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|---|---|
| CN101229572B (en) | 2010-12-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: CHINA RAILWAY BAOJI BRIDGE GROUP CO., LTD. Free format text: FORMER NAME: BAOQIAO CO., LTD., MINISTRY OF RAILWAYS |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 721006 Qing Jiang Road, Shaanxi, Baoji Patentee after: China Railway Baoji Bridge Group Co., Ltd. Address before: 721006 Qing Jiang Road, Shaanxi, Baoji Patentee before: Baoqiao Co., Ltd., Ministry of Railways |