CN204672693U - A kind of wire and bar mill - Google Patents
A kind of wire and bar mill Download PDFInfo
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- CN204672693U CN204672693U CN201520203749.6U CN201520203749U CN204672693U CN 204672693 U CN204672693 U CN 204672693U CN 201520203749 U CN201520203749 U CN 201520203749U CN 204672693 U CN204672693 U CN 204672693U
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Abstract
The utility model discloses a kind of wire and bar mill, comprise: the first transmission device, the first gear mesh that first driving shaft is different from the first driven shaft being provided with at least two pairs of gearratios, the first transmission device also has the first gearshift switching different first gear mesh and be fixedly connected with the first driving shaft or the first driven shaft; Second transmission device, the second gear mesh that the second driving shaft is different from the second driven shaft being provided with at least two pairs of gearratios, the second transmission device also has the second gearshift switching different second gear mesh and be fixedly connected with the second driving shaft or the second driven shaft; First power set, the first power set are connected with the first roller case by the first transmission device; Second power set, the second power set are connected with the second roller case by the second transmission device.In the utility model, each roller packing list is solely driven by low power power set, carries out power transmission by shift transmission mechanism, and expense, significantly by low, reduces investment and working service cost.
Description
Technical field
The utility model relates to steel rolling equipment technical field, particularly a kind of wire and bar mill.
Background technology
Milling train is as the capital equipment on steel hot rolling production line, shaping for being rolled by blank, as the rolling for spiral, round steel etc., and usually via roughing, in roll, the pre-passes such as finish rolling, finish rolling goes out finished product.
At present, for the finishing mill of wire rod rolling, because mill speed is high, milling train adopts roll topcross alternately to arrange frame usually, the nothing realizing rolled piece reverses rolling, and reduce vibration and be convenient to roll to change, and the second flow of each frame is equal during owing to requiring that frame spacing is little and require rolling, to avoid piling steel, the mode of usual employing central driving drives the roll on institute's organic frame, power is assigned to each frame by a major axis by a large mair motor, then the gear in each frame is assigned a different but fixing speed ratio.
This mode well ensure that the equal requirement of second flow between frame, but the multiple frame of continuous print is driven by a mair motor, cause main motor current huge, and need high-voltage motor be adopted, cost is significantly increased, and this high pressure heavy motor and electrical control gear technology thereof commercially many places in monopolization state, costly, difficult in maintenance, be difficult to be used more widely.
In addition, this multi-frame central driving mode, because its driving-chain is oversize, its no-load power even arrives and about goes up megawatt, cause great energy loss, the particularly situation of now increasingly competitive, the existence of steel production enterprise difficulty day by day, the kind of drive that this cost of investment is high, energy loss is large and milling train, can not meet that it reduces costs, the demand of energy-saving and emission-reduction.
In this central driving, the gear ratio of every platform milling train is fixed, can not shift throw-over, mill speed can only be met by motor variable-frequency speed-regulating and be about 20m/s ~ 110m/s wide region demand, be difficult to the effect giving full play of motor, be namely difficult to when rolling, by shifted, realize moment of torsion and export with effective coupling of speed, power of motor need be amplified and could meet rolling demand, cause loss.Simultaneously, because the speed ratio between frame is fixed, concentrate and driven by a motor, so when the collars wear extent of one of them frame is more, namely collars diameter diminishes, its collars linear velocity diminishes, cause second flow to be less than the second flow of adjacent milling train, produce heap steel, now, because milling train speed ratio is fixed, and by a motor central driving, must collars be changed, the even collars of multi-frame, just can re-establish the relation that between frame, second flow is equal, normal steel rolling, make collars loss large, spare part is many, difficult in maintenance, rolling cost is corresponding increase also.
Therefore, how reducing the Expenses Cost of milling train, is the current technical issues that need to address of those skilled in the art.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of wire and bar mill, and this milling train is invested and safeguarded that use cost is low.
For achieving the above object, the utility model provides following technical scheme:
A kind of wire and bar mill, comprises the first roller case and the second roller case, and described first roller case and described second roller case are that topcross state is installed on cone case, also comprise:
First transmission device, the first output shaft that described first transmission device comprises the first driving shaft, the first driven shaft and is connected with described first driven shaft, described first output shaft is connected with described first roller case, described first driving shaft from described first driven shaft is provided with the first different gear mesh of at least two pairs of gearratios, described first transmission device also has the first gearshift switching different described first gear mesh and be fixedly connected with described first driving shaft or described first driven shaft;
Second transmission device, the second output shaft that described second transmission device comprises the second driving shaft, the second driven shaft and is connected with described second driven shaft, described first output shaft is connected with described first roller case, described second driving shaft from described second driven shaft is provided with the second different gear mesh of at least two pairs of gearratios, described second transmission device also has the second gearshift switching different described second gear mesh and be fixedly connected with described second driving shaft or described second driven shaft;
First power set, described first power set are connected with described first roller case by described first transmission device;
Second power set, described second power set are connected with described second roller case by described second transmission device.
Preferably, the first tooth cover that described first gearshift comprises the first shift fork and is fixedly connected with described first driven shaft, described first tooth cover is arranged between two the first gears on described first driven shaft, its both ends of the surface are provided with the joint portion for being connected with described first gear, and the peripheral part of described first tooth cover is connected with described first shift fork clamping;
The second tooth cover that described second gearshift comprises the second shift fork and is fixedly connected with described second driven shaft, described second tooth cover to be arranged on described first driven shaft between two the second gears, its both ends of the surface are provided with the joint portion for being connected with described second gear, and the peripheral part of described second tooth cover is connected with described second shift fork clamping.
Preferably, described first roller case is connected with described first output shaft by the bevel gearing in described cone case; Described second roller case is connected with described second output shaft by bevel gearing described in another;
Described bevel gearing comprises bevel gear, bevel gear shaft and roller transmission shaft, described bevel gear shaft is connected with described first output shaft or described second output shaft, described bevel gear is set on described bevel gear shaft, and described roller transmission shaft engages with described bevel gear, roll mandrel respectively.
Preferably, also comprise the first power transmission shaft and/or second driving shaft, described first power transmission shaft is arranged between the first power shaft of described first transmission device and described first driving shaft, and described second driving shaft is arranged between the second power shaft of described second transmission device and described second driving shaft.
Preferably, described roll mandrel is engaged with the shaft gear in described roller transmission shaft by roller gear.
Preferably, described first transmission device and described second transmission device are arranged in gearbox.
In the wire and bar mill that the utility model provides, the roll topcross of the first roller case and the second roller case roller case is arranged, and carries out independent drived control by the first power set and the second power set respectively.The transmission device of two roller casees and correspondence, power set form minimum no twist rolling unit.On the one hand, ensure that closely spaced rolling mill practice demand between milling train top roll case, on the other hand, by the milling train of the central driving of multi-frame, become the rolling unit that two bench roller casees are housed, each roller case can be driven by low power power set separately, power set can be motor, and the gear driving pair of the first transmission device and the second transmission device reduces, and driving-chain path shortens, transmission efficiency improves, and no-load power is little.During use, low pressure low-power machine can be adopted to get final product transmission as power set, scope of supply is wide, and expense, significantly by low, reduces investment and working service cost.
In addition, adopt driven separately mode, two motors, also by speed regulating control, make the output speed of two motors form speed ratio relation flexibly, but not be fixed speed ratio between the rolling-mill housing of central driving mode, so, when the roll wear amount of one of them roller case increases, by the power set speed governing of correspondence, make two bench roller casees when easily ensureing that rolling second flow is equal, it is more flexible that Groove Design compares central driving, and roll spare part is less, and maintenance cost is low.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiment of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 provides by the utility model the structural representation of wire and bar mill specific embodiment;
Fig. 2 provides by the utility model the cut-away view of wire and bar mill specific embodiment;
Fig. 3 is provided wire and bar mill specific embodiment central roll case three-dimensional structure diagram by the utility model;
Fig. 4 provides by the utility model the structure chart of the first gearshift in wire and bar mill specific embodiment.
Wherein, 1 is cone case, and 3 is gearbox, and 21 is the first roller case, 22 is the second roller case, and 41 is the first power set, and 42 is the second power set, 101 is bevel gearing, and 102 is shaft gear, and 201 is roll mandrel, 202 is roller gear, and 301 is the first transmission device, and 302 is the second transmission device, 313 is the first tooth cover, and 314 is the first output shaft, and 324 is the second output shaft, 315 is the first power shaft, and 325 is the second power shaft, and 316 is the first shift fork.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Core of the present utility model is to provide a kind of wire and bar mill, and this milling train Expenses Cost is low.
Please refer to Fig. 1 to Fig. 3, Fig. 1 to Fig. 3 provides by the utility model the structural representation of wire and bar mill specific embodiment, cut-away view and roller case three-dimensional structure diagram.
The wire and bar mill that the present embodiment provides mainly comprises the first power set 41, second power set 42, first roller case 21 and the second roller case 22.First roller case 21 and the second roller case 22 are respectively the casing being provided with roll mandrel 201 and roll, to be meshed transmission by the gear on roll mandrel 201 with external motive device.
Two roll mandrels 201 are all provided with inside first roller case 21 and the second roller case 22, and the first roller case 21 and the second roller case 22 are arranged for topcross state, be installed on cone case 1, roll mandrel 201 on first roller case 21 is mutually vertical with the roll mandrel 201 on the second roller case 22, in topcross state, make rolled piece obtain rolling on two orthogonal directions of plane, can farthest make rolled piece meet rolling requirements.
The first transmission device 301 in the present embodiment and the second transmission device 302 are transmission gear of shafting.
First transmission device 301 comprises the first power shaft 315, first driving shaft, the first driven shaft and the first output shaft 314, first output shaft 314 of being connected with the first driven shaft is also connected with the first roller case 21.The first gear that first driving shaft is different from the first driven shaft being provided with two numbers of teeth, first gear of the first driving shaft should engage with the first gear mesh on the first driven shaft, form the first gear mesh that two groups of gearratios are different, first driven shaft is provided with the first gearshift, this first gearshift is fixedly connected with the first driving shaft or with the first driven shaft for switching different first gear mesh.Gearshift can be arranged on the first driving shaft, on the first driven shaft, or other positions.
The structure of the second transmission device 302 is substantially identical with the structure of the first transmission device 301.Second transmission device 302 comprises the second power shaft 325, second driving shaft, the second driven shaft and the second output shaft 324, second output shaft 324 of being connected with the second driven shaft is also connected with the second roller case 22.The second gear that second driving shaft is different from the second driven shaft being provided with at least two numbers of teeth, second gear of the second driving shaft should engage with the second gear mesh on the second driven shaft, form the second gear train that two groups of gearratios are different, second driven shaft is provided with the second gearshift, this second gearshift is fixedly connected with the second driving shaft or with the second driven shaft for switching different second gear mesh.Gearshift can be arranged on the second driving shaft, on the second driven shaft, or other positions.
Optionally, on first driving shaft and the first driven shaft, the number of the first gear is not limited to above-mentioned two, can be three or more, and the first gear corresponding engagement respectively on two axles, form the first gear train that multipair gearratio is different, the speed ratio that can increase transmission device is selected.Second driving shaft is identical with above-mentioned situation with the setting on the second driven shaft, repeats no more.
First roller case 21 connects the first power set 41, second roller case 22 by the first transmission device 301 and connects the second power set 42, first power set 41 by the second transmission device 302 and the second power set 42 individually drive two roller casees.Two roller casees, two transmission devices and two power set form minimum no twist rolling unit.Wherein, the first power set 41 and the second power set 42 can be all motor.On the one hand, ensure that closely spaced rolling mill practice demand between milling train top roll case, on the other hand, by the milling train of the central driving of multi-frame, become the minimum rolling unit that two bench roller casees are housed, each roller packing list is solely driven by low power power set, gear driving pair reduces, and driving-chain path shortens, and transmission efficiency improves, no-load power is little, and demand power also obviously reduces.During use, low pressure low-power machine can be adopted to get final product transmission as power set, scope of supply is wide, and expense, significantly by low, reduces investment and working service cost.
In addition, adopt driven separately mode, two motors, also by speed regulating control, make the output speed of two motors form speed ratio relation flexibly, but not be fixed speed ratio between the rolling-mill housing of central driving mode, so, when the roll wear amount of one of them frame is larger, by its drive motors speed governing, make two bench roller casees when easily ensureing that rolling second flow is equal, it is more flexible that Groove Design compares central driving, and roll spare part is less, and maintenance cost is low.
Preferably, above-mentioned first gearshift comprises the first shift fork 316 and the first tooth cover 313, and please refer to Fig. 4, Fig. 4 provides by the utility model the structure chart of the first gearshift in wire and bar mill specific embodiment.First tooth cover 313 is fixedly connected with the first driven shaft, and the first tooth cover 313 to be arranged on the first driven shaft between two the first gears, the both ends of the surface of the first tooth cover 313 are provided with the gear ring for being connected with the first gear, and the peripheral part of the first tooth cover 313 is connected with the first shift fork 316 clamping.First tooth overlap ring gear in 313 both ends of the surface can with the first gear clamping of above-mentioned two empty sets on the first driven shaft, thus make the first driven shaft can optionally with a clamping in two the first gears be separated, or be all in released state with the two.The peripheral part clamping that one end and first tooth of the first shift fork 316 overlap 313 is connected, the other end is connected with hand lever or hydraulic valve, manually bar or the mobile of hydraulic valve can realize stirring the first tooth cover 313, make the first tooth overlap the internal tooth of 313 end faces combine with the gear ring of the first gear of both sides or be separated, thus the combination of realized in the first driven shaft and two the first gears, final realization changes gear.All the other structures and the design of above-mentioned first gearshift please refer to prior art.
Second gearshift identical with the first gearshift structure, mainly comprise the second shift fork and with the second tooth cover, second tooth cover is fixedly connected on the second driven shaft, and the second tooth to be set on the first driven shaft between two the second gears, the both ends of the surface of the second tooth cover are provided with the gear ring for being connected with the second gear, and the peripheral part of the second tooth cover is connected with the second shift fork clamping.
Optionally, the structure of the first gearshift and the second gearshift is not limited to the form of above-mentioned tooth cover and shift fork, also can be realized the gearshift function of driven shaft by other arrangement of clutch.
By arranging gearshift on above-mentioned first transmission device 301 and the second transmission device 302, and at least two grades of speed ratios are set, effectively can give play to the power of motor, when low speed, use large speed ratio gear, increase output torque, when high speed, use low speed than speedup gear, improve output speed.Relatively, for the selection of motor, then can configure the rolling demand that low power motor just can meet wide region, namely mill speed scope is 20m/s ~ 110m/s, and such arranging can effectively reduce energy consumption.
Preferably, because the first gear on above-mentioned first driven shaft can be three or more, so the number of the first gearshift is not unique yet, be provided with the first gearshift between two the first gears that demand fulfillment is adjacent on the first driven shaft, or realize the gearshift at least three the first gears by the first unique gearshift.Arranging of second gearshift is the same, repeats no more.
On the basis of above-described embodiment, further the connection for transmission mode of the first output shaft 314, second output week 324 and roll mandrel 201 is introduced, in order to realize, above-mentioned first roller case 21, second roller case 22 topcross is arranged, the orthogonal design of roll mandrel 201 on it, needs to have certain to arrange angle for the transmission device be connected with roll mandrel 201 by the first output shaft 314, second output shaft 324.
Preferably, the first roller case 21 is connected with the first output shaft 314 by the bevel gearing 101 in cone case 1; Second roller case 22 is connected with the second output shaft 324 by another bevel gearing 101; Bevel gearing 101 comprises bevel gear, bevel gear shaft and roller transmission shaft, and bevel gear shaft is connected with the first output shaft 314 or the second output shaft 324, and bevel gear is set on bevel gear shaft, and roller transmission shaft engages with bevel gear, roll mandrel 201 respectively.
Wherein, the first output shaft 314 and the second output shaft 324 are all respectively connected by shaft coupling synchronous axial system with a bevel gear shaft, and bevel gear is fixedly connected on bevel gear shaft; Roller transmission shaft is provided with power transmission shaft bevel gear and shaft gear 102, power transmission shaft bevel gear engages with the bevel gear on bevel gear shaft, the rotatory force of bevel gearing 101 is supplied to roller transmission shaft, and the power of roller transmission shaft is transmitted by itself and being connected with a joggle of roller gear 202 by shaft gear 102.Roll mandrel 201 is engaged with the shaft gear 102 in roller transmission shaft by roller gear 202.
Aforesaid way, by roller case with roll mandrel 201 is all dismountable is arranged in frame 1, first roller case 21 and the second roller case 22 all can be departed from bevel gearing 101, and can separate from frame 1, the R and M of convenient roll mandrel 201.
Optionally, the first power transmission shaft can also be comprised in above-mentioned first transmission device 301, second driving shaft can also be comprised in second transmission device 302, first power transmission shaft is arranged between the first power shaft 315 of the first transmission device 301 and the first driving shaft, and second driving shaft is arranged between the second power shaft 325 of the second transmission device 302 and the second driving shaft.First power transmission shaft or second driving shaft are set, mainly in order to increase centre-to-centre spacing.Because the spacing between the first roller case 21 and the second roller case 22 sets according to process requirements, and consider that the size being connected the first power set 41, second power set 42 carrying out transmission with both respectively is also fixing, so the first transmission device 301 or the second transmission device 302 need the centre-to-centre spacing by increasing transmission, adapt to the link position between power set and roller case, arranged in the position of device entirety more reasonable.
Optionally, roll mandrel 201 is engaged with the shaft gear 102 in roller transmission shaft by roller gear 202.
Optionally, the first transmission device 301 and the second transmission device 302 are arranged in gearbox 3.Contribute to the volume of reduction means, effective Appropriate application space.
Optionally, above-mentioned first gear and the second gear can be spur gear wheel or cylindric spiral gear etc.First transmission device 301 and the second transmission device 302 also can differences as the case may be, select other forms of engaged transmission parts.
Optionally, the side of the gearbox 3 that the first roller case 21, second roller case 22 is positioned at, the first power set 41, second power set 42 are positioned at the opposite side of gearbox 3, and this arrangement contributes to shortening transmission and connects device.
Above wire and bar mill provided by the utility model is described in detail.Apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (6)
1. a wire and bar mill, comprise the first roller case (21) and the second roller case (22), described first roller case (21) and described second roller case (22) are installed in topcross state on cone case (1), it is characterized in that, also comprise:
First transmission device (301), the first output shaft (314) that described first transmission device (301) comprises the first driving shaft, the first driven shaft and is connected with described first driven shaft, described first output shaft (314) is connected with described first roller case (21), described first driving shaft from described first driven shaft is provided with the first different gear mesh of at least two pairs of gearratios, described first transmission device (301) also has the first gearshift switching different described first gear mesh and be fixedly connected with described first driving shaft or described first driven shaft;
Second transmission device (302), the second output shaft (324) that described second transmission device (302) comprises the second driving shaft, the second driven shaft and is connected with described second driven shaft, described second output shaft (324) is connected with described second roller case (22), described second driving shaft from described second driven shaft is provided with the second different gear mesh of at least two pairs of gearratios, described second transmission device (302) also has the second gearshift switching different described second gear mesh and be fixedly connected with described second driving shaft or described second driven shaft;
First power set (41), described first power set (41) are connected with described first roller case (21) by described first transmission device (301);
Second power set (42), described second power set (42) are connected with described second roller case (22) by described second transmission device (302).
2. wire and bar mill according to claim 1, it is characterized in that, the first tooth cover (313) that described first gearshift comprises the first shift fork (316) and is fixedly connected with described first driven shaft, described first tooth cover (313) is arranged between two the first gears on described first driven shaft, its both ends of the surface are provided with for the gear ring with described first gear face clamping, and the peripheral part of described first tooth cover (313) is connected with the clamping of described first shift fork (316);
The second tooth cover that described second gearshift comprises the second shift fork and is fixedly connected with described second driven shaft, described second tooth cover to be arranged on described first driven shaft between two the second gears, its both ends of the surface are provided with for the gear ring with described second gear face clamping, and the peripheral part of described second tooth cover is connected with described second shift fork clamping.
3. wire and bar mill according to claim 2, it is characterized in that, described first roller case (21) is connected with described first output shaft (314) by the bevel gearing (101) in described cone case (1); Described second roller case (22) is connected with described second output shaft (324) by bevel gearing described in another (101);
Described bevel gearing (101) comprises bevel gear, bevel gear shaft and roller transmission shaft, described bevel gear shaft is connected with described first output shaft (314) or described second output shaft (324), described bevel gear is set on described bevel gear shaft, and described roller transmission shaft engages with described bevel gear, roll mandrel (201) respectively.
4. wire and bar mill according to claim 3, it is characterized in that, also comprise the first power transmission shaft and/or second driving shaft, between the first power shaft (315) that described first power transmission shaft is arranged on described first transmission device (301) and described first driving shaft, between the second power shaft (325) that described second driving shaft is arranged on described second transmission device (302) and described second driving shaft.
5. wire and bar mill according to claim 4, is characterized in that, described roll mandrel (201) is engaged with the shaft gear (102) in described roller transmission shaft by roller gear (202).
6. wire and bar mill according to claim 5, is characterized in that, described first transmission device (301) and described second transmission device (302) are arranged in gearbox (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520203749.6U CN204672693U (en) | 2015-04-07 | 2015-04-07 | A kind of wire and bar mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520203749.6U CN204672693U (en) | 2015-04-07 | 2015-04-07 | A kind of wire and bar mill |
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| Publication Number | Publication Date |
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| CN204672693U true CN204672693U (en) | 2015-09-30 |
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| CN201520203749.6U Active CN204672693U (en) | 2015-04-07 | 2015-04-07 | A kind of wire and bar mill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785530A (en) * | 2015-04-07 | 2015-07-22 | 冯宗茂 | Bar mill |
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2015
- 2015-04-07 CN CN201520203749.6U patent/CN204672693U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104785530A (en) * | 2015-04-07 | 2015-07-22 | 冯宗茂 | Bar mill |
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Effective date of registration: 20160310 Address after: 400030 C 4-1, University City Education and technology promotion center, 1 University Town South Road, Shapingba District, Chongqing Patentee after: CHONGQING MAITUO TECHNOLOGY Co.,Ltd. Address before: 400038, No. 10, Fung Tin Road, Shapingba District, Chongqing, 1, 20-3 Patentee before: Feng Zongmao |
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Effective date of registration: 20160721 Address after: Tonking road 400000 Chongqing Nan'an District No. 2 of No. 7 Patentee after: CHONGQING ROLLING ENGINEERING TECHNOLOGY CO.,LTD. Address before: 400030 C 4-1, University City Education and technology promotion center, 1 University Town South Road, Shapingba District, Chongqing Patentee before: CHONGQING MAITUO TECHNOLOGY Co.,Ltd. |
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Address after: 400000 3-26, main building 6, No. 8, Jiangxia Road, Nan'an District, Chongqing Patentee after: CHONGQING ROLLING ENGINEERING TECHNOLOGY CO.,LTD. Address before: Tonking road 400000 Chongqing Nan'an District No. 2 of No. 7 Patentee before: CHONGQING ROLLING ENGINEERING TECHNOLOGY CO.,LTD. |
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Effective date of registration: 20200123 Address after: 243000 building 3, No. 669, Chaoshan West Road, Ma'anshan economic and Technological Development Zone (Demonstration Park), Ma'anshan City, Anhui Province Patentee after: Anhui Sinosteel Nuotai Engineering Technology Co.,Ltd. Address before: 400000 3-26, main building 6, No. 8, Jiangxia Road, Nan'an District, Chongqing Patentee before: CHONGQING ROLLING ENGINEERING TECHNOLOGY CO.,LTD. |