CN1289223C - Cold-bent central beam for manufacturing railway carriage - Google Patents
Cold-bent central beam for manufacturing railway carriage Download PDFInfo
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- CN1289223C CN1289223C CN 03125344 CN03125344A CN1289223C CN 1289223 C CN1289223 C CN 1289223C CN 03125344 CN03125344 CN 03125344 CN 03125344 A CN03125344 A CN 03125344A CN 1289223 C CN1289223 C CN 1289223C
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- cold
- central sill
- central beam
- clod wash
- roll
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Abstract
The present invention relates to a cold-bent central beam used for manufacturing railway vehicles and a manufacturing method thereof. The cold-bent central beam presents a 'cap'-shaped and is in an integrated structure, materials adopt high-strength weathering steel of which the yield strength, sigma s is equal to or more than 350Mpa and the tensile strength, sigma b is more than or equal to 450MPa, and the product is manufactured by a continuous roller type cold-bent method. The cold-bent central beam of the present invention is an integrated central beam which adopts heat rolling plates as raw material and is obtained by a continuous roller type forming on a machine group formed in a cold-bent forming, compared with the heat rolling central beam, the cold-bent central beam has the advantages of light weight, high intensity and good rigidity, can be adapted to the requirements of light vehicle weight, high speed and heavy load, can reduce the steel consumption and the production cost, and can extend the service life of vehicles.
Description
Technical field the present invention relates to girder steel, relates in particular to a kind of clod wash central sill and manufacture method thereof that rolling stock is made that be used for.
The background technology central sill is the spine of railway freight-car, it is one of the crucial supporting part on railway freight-car chassis, three kinds of general railway freight-cars for a long time: the central sill that open-top car, van and tank car adopted is hot rolling Yi shape steel welding structure, it adopts the hot rolling Yi shape steel welding of two high 310mm to form (as shown in Figure 1), because central sill adopts hot-rolled steel section welding structure, it exists, and weight is big, welding quality requires high (needing Non-Destructive Testing), operation is various, integrated cost is high shortcoming.So, for a long time the relevant leader of the Ministry of Railways, scientific research institutions, Railway Car Plant all wish to develop a kind of global formation, in light weight, intensity is high, the efficient cold-rolled forming section of good rigidity replaces the hot rolling Yi shape steel.Since the last century the nineties, railroad is for satisfying the fast-developing and people of national economy to trip high speed needs efficiently, and passenger train has experienced four big speed-raisings.Because the passenger vehicle speed-raising, railway freight has been subjected to very big influence.So the rolling stock manufacturing industry presses for the employing new material, with light, quick, the heavily loaded requirement of the light weight that adapts to the new period.
The clod wash central sill replaces the hot rolling central sill many unexpected difficulties.Adopt the clod wash central sill in the world beyond example on the general purpose freight car, the rolling stock safety in operation is had relatively high expectations, and need do a large amount of technological demonstration work.Because clod wash central sill development size is near 1200mm, thickness reaches 10mm or 12mm, and it is very huge to be used for producing the required milling equipment of central sill, and the domestic unit that can produce seldom.Roll has high input, and the required roll of whole production line is about 1,500,000 yuan.Because the central sill cross dimensions is bigger, cold bending process need solve a correlation technique difficult problem.As when crooked vertical edge and the base angle, along with angle is increasing, the height that vertical edge rises is high more, " linear differential " is increasing, " linear differential " is meant that the axle of a certain sortie of milling train rotates with certain angular velocity omega, along with roll hypotenuse diameter progressively increases, the linear velocity in the place that roller diameter is big can be greater than the little place of diameter.If " linear differential " is excessive, the suffered frictional force of rolled piece can be very big, to on rolled piece, produce scuffing, in addition, according to the principle of active force and reaction force, the frictional force of rolled piece breaker roll also can be increasing, and the one, accelerated the wearing and tearing of roll, the 2nd, make mill load increasing, rolling being difficult to carried out smoothly.Even after this product development success, also will be by the examination of vehicle trial run and relevant technologies department of the Ministry of Railways.Because there is above-mentioned variety of problems, though clod wash central sill development problem just proposed before the more than ten years, this product fails to develop for a long time always.
Summary of the invention the objective of the invention is in order to solve the deficiency that the above-mentioned background technology exists, propose a kind of global formation, in light weight, intensity is high, good rigidity can adapt to light weight gently, at a high speed, heavily loaded requirement, and reduction steel consumption, reduce production costs, prolong the clod wash central sill that rolling stock is made that is used for of vehicle service life.
For achieving the above object, the present invention adopts following technical scheme: a kind of clod wash central sill that is used for the rolling stock manufacturing, this clod wash central sill is " shape for hat ", is monolithic construction, material selection yield strength σ
s〉=350Mpa, tensile strength sigma
bThe high strength anti Hou Gang of 〉=450Mpa adopts continuous roller type cold bending shaping method production.Should " shape for hat " comprise cap body n, shade m, and also can not want shade, and include only the cap body, shade m can outwards roll over, also can be to invagination, and two vertical edges of cap body n can be vertical, also can tilt.
Another object of the present invention provides a kind of manufacture method of making above-mentioned clod wash central sill.This method adopts first moulding clod wash central sill wide width wing edge, and the reshaping vertical edge is shaped to the continuous roller type cold bending shaping technological process of standard section at last.
This cold-bending molding technology is finished on the cold roll forming unit, adopt a kind of special equipment, this special equipment comprises top and bottom rolls, design has initiatively roll and passive roll in top and bottom rolls, initiatively roll and roll mandrel are fixedly linked, rotate with roll mandrel, link to each other by bearing between passive roll and the roll mandrel.
When this special equipment is used for cold-rolled forming section vertical edge molding procedure, described passive roll is positioned on the bottom roll axle of active bottom roll both sides, it is coaxial with the active bottom roll that is positioned on the bottom roll axle, the working face of passive bottom roll is close to the cold-rolled forming section vertical edge, described topping roll is the active roll, and the active roll is close to the top and bottom on cold-rolled forming section base up and down.
Clod wash central sill of the present invention is on the cold roll forming unit, and the employing hot-rolled coil is a raw material, and by the monoblock type central sill (its cross section is as shown in Figure 2) that the continuous roll type obtained by molding arrives, the clod wash central sill has been compared following advantage with the hot rolling central sill:
1, raw material intensity is higher: it is raw material that the clod wash central sill adopts high strength anti Hou Gang, as Wuhan Iron and Steel Plant W400QN or W450QN, and the yield strength σ of W400QN
s〉=400Mpa, tensile strength sigma
b〉=490Mpa; The yield strength σ of W450QN
s〉=450Mpa, tensile strength sigma
b〉=550Mpa.Hot rolling Yi shape steel material is 09V, its yield strength σ
s〉=275Mpa, tensile strength sigma
b〉=410Mpa.
2, in light weight: the thick clod wash central sill of 10mm substance is 91.5kg/m, and the thick clod wash central sill of 12mm substance is 108.8kg/m.Hot rolling central sill substance is 124.24kg/m, presses the thick clod wash central sill of 10mm, every long 13.2m measuring and calculating, and every chassis can alleviate deadweight 432kg; Press the thick clod wash central sill of 12mm, every long 13.2m measuring and calculating, every chassis can alleviate deadweight 204kg.
3, the clod wash central sill is a monolithic construction, compares all multiple operation such as having saved welding, polishing, rectification, flaw detection with the hot rolling central sill, and work efficiency improves, and integrated cost significantly reduces.
4, to compare sectional dimension more accurate for clod wash central sill and hot rolling central sill, and it is more convenient that install on the chassis.
5, the clod wash central sill is better than hot rolling central sill surface quality.
Description of drawings
Fig. 1 is existing hot rolling central sill sectional view.
Fig. 2 is that clod wash central sill shade of the present invention is rolled over sectional view outward.
Fig. 3 is a clod wash central sill shade invagination sectional view of the present invention.
Fig. 4 is that clod wash central sill of the present invention is non-cap along sectional view.
Fig. 5 is the format roll floral diagram of cold-bending molding technology of the present invention.
Fig. 6 is the profile of operation 9 used special equipments among Fig. 5.
Fig. 7 is a passive roll structural representation among Fig. 6.
The specific embodiment
Clod wash central sill cross sectional shape of the present invention is " shape for hat ", should " shape for hat " comprise cap body n, shade m, can not want shade yet, include only cap body n (see figure 4), shade m can outwards roll over (see figure 2), also can be to the invagination (see figure 3), two vertical edges of cap body n can be vertical, also can tilt.It is raw material that this clod wash central sill adopts the high strength anti Hou Gang hot-rolled coil of Wuhan Iron and Steel Plant W400QN or W450QN, wherein, and the yield strength σ of W400QN
s〉=400Mpa, tensile strength sigma
b〉=490Mpa; The yield strength σ of W450QN
s〉=450Mpa, tensile strength sigma
b〉=550Mpa.
The shade beam cold-bending molding technology flow process of compromising outward:
Hot rolling → slitting → uncoiling → leveling → crop butt welding → kink storage → moulding → shaping → aligning → fly sawing breaks
Illustrate:
1, slitting promptly on slitting line, is cut into hot rolling burr volume on the slitting band of the required width of technological design.
2, uncoiling promptly on the uncoiler of cold roll forming unit, is opened the slitting band.
3, leveling is meant the slitting band after the uncoiling, the camber on the leveling elimination strip, side sway etc.
4, crop butt welding, kink store refer to the slitting behind the leveling take the lead, tail cuts off, to postwelding, charge into kink and store, guarantees rolling continuously not uninterruptedly.
5, moulding, integer, aligning are the critical processes that cold-rolled forming section is produced.
The clod wash central sill has adopted the way of multistep molding, promptly first moulding clod wash central sill wide width wing edge m, and the vertical edge of reshaping cap body n, final grading becomes the moulding process (as shown in Figure 5) of standard section.
5.1 first, second, third and fourth puts up type cap steel wide width wing edge m, deformation angle is 22.5 °, 45 °, and 67.5 °, 90 °.
5.2 five, six, seven, eight, nine, the ten vertical edge n that put up type cap steel cap body, deformation angle is 15 °, 30 °, and 45 °, 60 °, 75 °, 90 °.
Six, seven, eight, nine are adopted a kind of special equipment, and as shown in Figure 6, this special equipment comprises topping roll 10, bottom roll 11, driven roll 12.Topping roll 10 and bottom roll 11 links by flat key with upper and lower roll mandrel, rotates with roll mandrel, links to each other by bearing between passive roll and the roll mandrel.Passive roll is positioned at the initiatively both sides of bottom roll 11, and its working face is close to the cold-rolled forming section vertical edge, and topping roll 10 and bottom roll 11 are active rolls, and the active roll is close to the top and bottom on cold-rolled forming section base up and down.
The structure of described passive roll as shown in Figure 7, it is made up of members such as roll 1, end cap 2, locking nut 3, axle sleeve 4, roll mandrel 5, bearing 6, paper washer 7, felt collar 8 and o shape circles 9, axle sleeve 4 and bottom roll 11 near, bottom roll 11, axle sleeve 4, bearing inner race rotate with same angular velocity.Roll 1 becomes driven roll with bearing outer ring.Overcome linear differential between roll 1 and the bottom roll 11 effectively by this kind structure, reduced rolling resistance, alleviated the scuffing on the rolled piece.
5.3 the 11,12,13,14,15 is the integer operation, is about to roll pass and is designed to the standard pass, makes the central sill cross sectional dimensions reach standard-required.
5.4 the aligning operation by adjusting smoothing roll, guarantees that the clod wash central sill is vertically not crooked, does not reverse.
5.5 flying sawing disconnected is by the numerical control scale, and central sill is divided into needed various cut lengths.
In sum, clod wash central sill of the present invention compare with traditional hot rolling central sill have in light weight, Intensity height, good rigidity advantage, it can adapt to light weight gently, at a high speed, heavily loaded requirement, and fall Low steel consumption reduces production costs, and prolongs vehicle service life.
Claims (2)
1, a kind of clod wash central sill that is used for the rolling stock manufacturing adopts continuous roller type cold bending shaping method production, it is characterized in that this clod wash central sill is " shape for hat ", is monolithic construction, material selection yield strength σ
s〉=350Mpa, tensile strength sigma
bThe anti-Hou Gang of 〉=450Mpa.
2, a kind of described manufacture method that is used for the clod wash central sill of rolling stock manufacturing of claim 1 that is exclusively used in, it is characterized in that this method adopts continuous roller type cold bending shaping method elder generation moulding clod wash central sill shade, reshaping cap body vertical edge is shaped to the clod wash central sill of standard section at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03125344 CN1289223C (en) | 2003-08-28 | 2003-08-28 | Cold-bent central beam for manufacturing railway carriage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03125344 CN1289223C (en) | 2003-08-28 | 2003-08-28 | Cold-bent central beam for manufacturing railway carriage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1515365A CN1515365A (en) | 2004-07-28 |
| CN1289223C true CN1289223C (en) | 2006-12-13 |
Family
ID=34239610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03125344 Expired - Fee Related CN1289223C (en) | 2003-08-28 | 2003-08-28 | Cold-bent central beam for manufacturing railway carriage |
Country Status (1)
| Country | Link |
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| CN (1) | CN1289223C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE0501650L (en) * | 2005-07-11 | 2006-05-23 | Ortic 3D Ab | Method of rolling a hat profile and roll forming machine |
| CN101875079A (en) * | 2009-04-29 | 2010-11-03 | 上海和达汽车配件有限公司 | Rolling and forming system for processing reinforcement beam of automobile |
| CN101569902B (en) * | 2009-05-27 | 2011-01-05 | 广东金刚玻璃科技股份有限公司 | Fire-resistant precision steel profile cold-formed dovetail groove equipment |
| CN101954400B (en) * | 2010-05-31 | 2012-01-11 | 南京万汇新材料科技有限公司 | Continuous roll cold bending forming method for stainless steel water stop strips |
| CN102431567A (en) * | 2010-09-29 | 2012-05-02 | 齐齐哈尔轨道交通装备有限责任公司 | Center sill structure |
| CN102431568A (en) * | 2010-09-29 | 2012-05-02 | 齐齐哈尔轨道交通装备有限责任公司 | inverted-V-shaped middle beam structure |
| CN102513473B (en) * | 2011-12-26 | 2013-11-06 | 南京万汇新材料科技有限公司 | Continuous roller type cold-roll forming process for stainless steel covering panels of car bodies |
| CN102489569B (en) * | 2011-12-26 | 2013-08-07 | 南京万汇新材料科技有限公司 | Continuous cold roll forming method for stainless steel vehicle roof boundary beam |
| CN103286170B (en) * | 2013-06-14 | 2015-07-01 | 宜昌船舶柴油机有限公司 | Super-long double-U-shaped guide rail manufacturing method |
| CN103498552B (en) * | 2013-09-02 | 2016-08-17 | 杨玉喜 | Cold-rolled forming section and preparation method thereof |
| CN104275348B (en) * | 2014-10-09 | 2016-09-21 | 武汉钢铁(集团)公司 | A kind of hat steel formation system |
| CN106195607B (en) * | 2016-08-25 | 2018-05-29 | 上海佳冷型钢有限公司 | Local closed open cold-forming sectional steel and its moulding process |
| CN107716628B (en) * | 2017-10-27 | 2024-05-03 | 凌云工业股份有限公司 | Rebound control device for high-strength steel cold-formed product piece |
| CN108906992A (en) * | 2018-06-29 | 2018-11-30 | 上海菲格瑞特汽车科技股份有限公司 | A kind of zigzag shape beam piece forming technology and its two times punch mold |
-
2003
- 2003-08-28 CN CN 03125344 patent/CN1289223C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1515365A (en) | 2004-07-28 |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN IRON AND STEEL GROUP CORP. Free format text: FORMER OWNER: HANKOU STEEL ROLLING MILL, WUHAN IRON + STEEL GROUP Effective date: 20061110 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20061110 Address after: 430083 patent office, WISCO's science and technology innovation department, No. 2, gate, Gate No., Qingshan District, Wuhan, Hubei Patentee after: Wuhan Iron & Steel (Group) Co., Ltd. Address before: 430035 Gutian road in Hubei province Wuhan City Qiaokou District No. 61 Patentee before: Hankou Steel Rolling Mill, Wuhan Iron & Steel Group |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061213 Termination date: 20160828 |
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| CF01 | Termination of patent right due to non-payment of annual fee |