WO2015188421A1 - Dispositif de laminage de barres de grande longueur pour un rail de guidage en t d'un ascenseur, et sa ligne de production - Google Patents

Dispositif de laminage de barres de grande longueur pour un rail de guidage en t d'un ascenseur, et sa ligne de production Download PDF

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Publication number
WO2015188421A1
WO2015188421A1 PCT/CN2014/082016 CN2014082016W WO2015188421A1 WO 2015188421 A1 WO2015188421 A1 WO 2015188421A1 CN 2014082016 W CN2014082016 W CN 2014082016W WO 2015188421 A1 WO2015188421 A1 WO 2015188421A1
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WO
WIPO (PCT)
Prior art keywords
rolling
guide rail
elevator
length
long
Prior art date
Application number
PCT/CN2014/082016
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English (en)
Chinese (zh)
Inventor
谭成楠
马靳江
李欣
樊泽兴
牛强
祝辉
彭仲佳
Original Assignee
中冶赛迪工程技术股份有限公司
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Application filed by 中冶赛迪工程技术股份有限公司 filed Critical 中冶赛迪工程技术股份有限公司
Publication of WO2015188421A1 publication Critical patent/WO2015188421A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B21B1/092—T-sections

Definitions

  • the invention belongs to the field of steel metallurgy industrial steel rolling forming, and particularly relates to a rolling method for an elevator ⁇ -type guide rail and a production line thereof.
  • the elevator guide rail is a safe rail for the elevator to travel up and down in the hoistway.
  • the guide rail is installed on the hoistway wall.
  • the rail bracket and the rail bracket are fixedly connected to the hoistway wall, which is related to one of the stable components of the elevator system operation. There is no substitute product at present.
  • the cross-section of the commonly used guide rails of the elevator is an asymmetrical cross section, and most of them are similar to the ⁇ -shaped section, which has the characteristics of strong rigidity, high reliability, safety and low cost.
  • the plane of the guide rail must be smooth and there is no obvious uneven surface. Since the guide rail is the guide rail of the elevator car and the safety rail, the clearance must be ensured during installation. At the same time, the guide rail must bear the responsibility of stopping the elevator when the elevator has an overspeed accident, so its rigidity, wear resistance and stability can not be ignored.
  • GB/T 22562-2008 (ISO 7465: 2007) Hole-rolling method for T75 elevator guide rails. Due to the long leg of the elevator guide rail, the inclination of the inside of the leg is small, and the dimensional accuracy is high.
  • the conventional two-roll mill has a complicated hole design, a large groove depth and a low roll strength (breaking roll) The risks are high), the hole type wears fast, the roll life is low, the production operation is complicated, the product size precision is low, and the production efficiency is low.
  • the rolling of the elevator guide rail by the traditional production process technology similar to the heavy rail universal rolling method has the disadvantages of poor asymmetric rolling stability, and the curved guide rail of the asymmetric cross section is obviously bent after cooling, thereby affecting the subsequent straightening. Production pace of finishing processes such as fixed length, Production efficiency is low.
  • the shortcomings of this short-slung production process include the cutting of a full-length rolling stock into a short length and then the subsequent cold working.
  • the production disadvantages are: 1) The sawing process of the sawing machine such as hot saw or hot shear after finishing is increased, sawing Increase in sheet and energy consumption; 2) Increased number of short-rolled parts on cold beds, complicated control procedures for cooling beds, and increased production management costs; 3) Increased straightening times, slower production rhythms, and increased head/tail dead zone of straightened products; 4 The number of cutting heads/tails of cold saw cuts is increased, the saw blade is expensive, and the cost of saw blades is high. 5) The product yield is reduced, the production and management costs are increased, and the market competitiveness is low.
  • the invention discloses a long-length rolling method for an elevator T-shaped guide rail, and the method can not only solve the cooling and bending phenomenon caused by the limitation of cooling conditions after the universal rolling of a single elevator guide rail, but also improve the elevator.
  • the surface quality after rolling of the guide rail, improving the internal stress after rolling, improving the dimensional accuracy and performance of the elevator guide rail, and realizing the long-length production process of the elevator guide rail "long-length rolling, long-length cooling, long-length straightening".
  • a long-length rolling method for an elevator T-shaped guide rail first, an H-type continuous casting blank is used as a raw material; then, an H-type continuous casting blank is sent to a universal double-joint rolling process, and rolled into a symmetrical double Next, the T-shaped guide rails are sent to the cooling device for cooling. After cooling, the connected T-shaped guide rails are divided into two independent T-shaped finished products through a split straightening process. Finally, the final product is obtained by performing a subsequent processing such as slitting and cutting on the T-shaped finished product after the split;
  • the H-type continuous casting blank is continuously rolled and deformed in a plurality of universal rolling mills and edge-cuttering machines to obtain an elevator guide rail in a final joint state; further, the universal mold In the last rolling deformation of the double-joint rolling process, the joint portion of the two connected elevator guide rails is rolled out to obtain a positioning groove for positioning in the subsequent split straightening process;
  • the split straightening process may be first divided into two-rolled parts, and then two separate single-rolled parts may be straightened; or the two-rolled parts may be straightened first, and then split into two separate rolled pieces; Further, the connected T-shaped guide rail is cooled and cooled in the cooling device, and the offline finishing includes offline double straightening, offline sawing, stacking, stacking, and collecting and feeding; After the feeding, the cutting straightening process is further divided into two independent T-shaped finished products; finally, the final finished product is obtained by performing a subsequent processing such as cutting and cutting of the split T-shaped finished product.
  • the invention also claims a production line for rolling using the above process: package a heating furnace for heating an H-type continuous casting slab, a universal double-joint rolling line for rolling a H-type continuous casting blank into a symmetrical double-shaped T-shaped guide rail, for a cooling bed for cooling a joint T-rail, a split straightening unit for splitting the joint T-rail, and a post-processing line for post-processing;
  • the universal twin-roll rolling production line comprises a roughing mill and a medium finishing mill which are sequentially arranged, and the roughing mill and the medium finishing mill each comprise a continuous rolling mill and a reversing rolling mill unit;
  • an online shearing device is arranged before or after the continuous rolling mill unit or the reversing rolling mill unit;
  • a cooling device for controlling the temperature of the rolling stock is provided in front of, behind and in the middle of the continuous rolling mill or the reversing rolling mill unit;
  • the post-processing line includes a traversing marshalling gantry, a cold sawing device, a checking stacking device, a baler, and a collecting gantry.
  • the invention has the following beneficial effects: Firstly, it can solve various drawbacks of the conventional two-roll single-rolled elevator guide rail, realize free-form high-precision rolling of the elevator guide rail; Second, solve the single-rolling of the elevator guide rail after During the cooling process, a large amount of bending occurs, which leads to the problem that the long-length rolling stock cannot smoothly enter the straightening machine for straightening, dredges the entire production line logistics, improves the production rhythm and fluency of each process, and realizes "long-length rolling, Long-length cooling, long-length straightening "long-length production” process; Third, reduce the number of long-cut and short-cut sawing after hot-rolling, reduce production and equipment loss costs, and significantly increase the production capacity of the production line; Fourthly, it reduces the production failure caused by uneven deformation during the traditional two-roller and universal single-rolling, reduces the production energy consumption, equipment loss, and improves the production efficiency.
  • the invention is also applicable to other asymmetric cross-section shaped steel into double
  • Figure 1 is a schematic view showing the production process of the present invention
  • Figure 2 is a schematic view of the elevator T-shaped rail
  • Figure 3 is an H-type original blank for rolling a connected elevator guide rail
  • Figure 4 is a schematic view showing the general rough rolling section of the present invention.
  • Figure 5 is a schematic view showing the rough section of the roughing of the present invention.
  • Figure 6 is a schematic view showing the cross section of the universal middle rolling of the present invention.
  • Figure 7 is a schematic cross-sectional view of a rolled edge in the present invention.
  • Figure 8 is a schematic cross-sectional view of the universal finishing rolling of the present invention.
  • Figure 9 is a schematic cross-sectional view of the split-connected elevator guide rail
  • Figure 10 is a schematic view showing the simultaneous straightening of two independent elevator guide rails after splitting
  • FIG 11 is a schematic view showing the arrangement of the production line of the present invention.
  • the long-length rolling production line of the elevator ⁇ -type guide rail of the present invention comprises: a heating furnace 1 for sequentially heating the H-type continuous casting slab, which is used for rolling the H-type continuous casting slab into Universal double-joint rolling line for symmetrical double T-rails, cold bed 8 for cooling the connected T-rails, for splitting and straightening the connected T-rails
  • the universal twin-rolling production line comprises a roughing unit 2 and a medium finishing unit 5 which are arranged in sequence, and the roughing unit and the medium finishing unit each comprise a continuous rolling unit and a reversing rolling mill unit; in this embodiment,
  • the in-line shearing device of the present embodiment includes the first in-line shearing device 4 and the second in-line shearing device 7; in the embodiment
  • the cooling device in this embodiment includes the first cooling device 3 and the second cooling device 6;
  • the post-processing line includes a traverse marshalling gantry 11, a cold sawing device 12, a check stacking facility 13, a baler 14 and a collecting gantry 15, which are arranged in sequence.
  • the long-length rolling method of the elevator T-shaped guide rail of the present invention consists in: first, using the H-type continuous casting blank as the original blank; and then, feeding the H-type continuous casting blank into the universal double
  • the continuous rolling process is rolled into a symmetrical T-shaped guide rail; then, the connected T-shaped guide rail is sent to a cooling device for cooling, and after cooling, the connected T-shaped guide rail is sectioned and straightened.
  • the process is divided into two independent T-shaped finished products; finally, the final product is obtained by performing a subsequent processing such as slitting and cutting on the split T-shaped finished product.
  • the "H" type continuous casting blank is selected for the rolling original blank of the elevator guide rail. Since the deformation section is similar to the cross section of the connected elevator rail, the molding pass can be reduced and the production efficiency can be improved on the basis of ensuring the product quality.
  • the billet is heated and transported to several universal rolling mills and edger for continuous rolling deformation. During the rolling process, the double-symmetric elevator rails are joined together and the rolling deformation is carried out in the rolling mill, as shown in Fig. 4. To Figure 8.
  • an online shearing device is arranged between the rolling mills to cut off the irregular head generated by continuous deformation.
  • a cooling device for controlling the temperature of the rolling stock is provided in front of, after and in the middle of the continuous rolling mill to realize online Controlled rolling and controlled cooling or hot rolling process.
  • the symmetrical connected double elevator guide rails are cut by the hot saw to cut the head/tail and sampled and then enter the cold bed for long-length cooling. Since the rolling stock is symmetrically connected at this time, its own cooling condition has been significantly improved. Therefore, after cooling, the double-joint elevator guide rolling stock has a significantly reduced bending amplitude, which is completely different from the significant bending phenomenon after cooling of a single elevator guide rail.
  • the cooled joint rolling piece is transported by roller conveyor to the splitting and straightening unit, and the joint rolling piece is centered by the centering device and the positioning groove in the middle of the continuous rolling piece, and then the piece is connected by the splitting device.
  • the rolling stock is split and then straightened into the straightening unit to straighten the two separate elevator rails.
  • the processing steps of the splitting device and the straightening unit are sequentially and simultaneously performed, and after the joint rolling stock enters the splitting and straightening unit, two separate elevator guide finished products are formed. After straightening, a plurality of elevator guide rails are arranged in rows by the traverse grouping device, and are transported to the cold sawing line for the finished fixed-length sawing.
  • the H-type continuous casting blank is continuously rolled and deformed in a plurality of universal rolling mills and edge-rolling machines to obtain an elevator guide rail in a final joint state.
  • the joint portion of the two connected elevator guide rails is rolled out to locate the positioning groove for the subsequent split straightening process positioning.
  • the joint portion of the two connected elevator guide rails is rolled out to locate the positioning groove for the subsequent split straightening process positioning.
  • the splitting and straightening process may be first divided into two-rolled parts, and then two separate single-rolled parts may be straightened; or the two-rolled parts may be straightened first, and then divided into two separate rolling parts. Pieces.
  • the connected T-shaped guide rails are cooled in the cooling device and then subjected to online finishing.
  • offline finishing can also be adopted, and offline finishing includes offline. Double straightening, off-line sawing, stacking and collecting and re-feeding; collecting and re-feeding, then entering the split straightening process, split into two independent ⁇ -type finished products; finally, by splitting After the subsequent ⁇ type finished product is subjected to a subsequent processing such as cut-to-length sawing, the final product is obtained.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)

Abstract

L'invention concerne un procédé de laminage de barres de grande longueur pour un rail de guidage en T d'un ascenseur, et sa ligne de production. Le procédé comprend principalement les étapes de : d'abord, prise, en tant que matériau de billette original, d'une billette coulée par coulée continue en H ; puis introduction de la billette coulée par coulée continue en H dans une opération de laminage universel conjoint par paires, pour être laminée en un rail de guidage en T en paires symétriques ; puis introduction du rail de guidage en T conjoint dans un dispositif de refroidissement pour refroidissement et, après refroidissement, subdivision du rail de guidage de T conjoint en deux pièces laminées finies en T indépendantes par une opération de subdivision et de dressage ; et finalement, après un traitement ultérieur, des opérations telles qu'un calibrage, une coupe à la scie, etc., sont mises en œuvre sur les pièces laminées finies en T subdivisées, pour donner un produit fini final. Ce procédé non seulement peut résoudre le problème d'un phénomène de cintrage au refroidissement dû à la limitation des conditions de refroidissement après que le laminage universel est mis en œuvre sur un rail de guidage d'ascenseur unique, mais peut aussi augmenter la qualité superficielle du rail de guidage d'ascenseur laminé, améliorer la contrainte interne laminée et augmenter la précision de taille et les performances en cours d'utilisation du rail de guidage d'ascenseur, ce qui réalise le procédé de production de barres de grande longueur de "laminage de barre de grande longueur, refroidissement de barre de grande longueur et dressage de barre de grande longueur" du rail de guidage pour ascenseur.
PCT/CN2014/082016 2014-06-12 2014-07-11 Dispositif de laminage de barres de grande longueur pour un rail de guidage en t d'un ascenseur, et sa ligne de production WO2015188421A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410260224.6A CN104014587A (zh) 2014-06-12 2014-06-12 电梯t型导轨的长尺轧制方法及其生产线
CN201410260224.6 2014-06-12

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WO2015188421A1 true WO2015188421A1 (fr) 2015-12-17

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CN104289517A (zh) * 2014-09-23 2015-01-21 南京钢铁股份有限公司 一种离线剖分板的生产方法
CN105290109A (zh) * 2015-12-06 2016-02-03 辽宁宏昌重工股份有限公司 电梯导轨切分轧制时使用的轧辊组件及轧制方法
CN105414237A (zh) * 2015-12-11 2016-03-23 山东石横特钢集团有限公司 一种钢型材生产装置及其工艺
CN105583631B (zh) * 2016-02-29 2018-08-03 中冶华天工程技术有限公司 在线连剖连矫连锯成对生产电梯导轨精整设备及方法
CN110142293A (zh) * 2019-05-09 2019-08-20 山东钢铁股份有限公司 开放式型钢的轧制方法及其轧制系统
CN111468911A (zh) * 2020-04-07 2020-07-31 中冶东方工程技术有限公司 一种钢轨精整方法和生产线
CN115092790A (zh) * 2022-08-24 2022-09-23 浙江保利电梯导轨制造有限公司 一种电梯导轨连接定位结构及其组件成型工艺

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