CN110695101B - Cold bed blanking finishing process production line and control method thereof - Google Patents
Cold bed blanking finishing process production line and control method thereof Download PDFInfo
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- CN110695101B CN110695101B CN201910920296.1A CN201910920296A CN110695101B CN 110695101 B CN110695101 B CN 110695101B CN 201910920296 A CN201910920296 A CN 201910920296A CN 110695101 B CN110695101 B CN 110695101B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B43/00—Cooling beds, whether stationary or moving; Means specially associated with cooling beds, e.g. for braking work or for transferring it to or from the bed
- B21B43/006—Transfer from bed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/002—Piling, unpiling, unscrambling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/02—Feeding or supporting work; Braking or tensioning arrangements, e.g. threading arrangements
- B21B39/06—Pushing or forcing work into pass
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Abstract
The invention belongs to the field of hot rolling production, and discloses a cold bed blanking finishing process production line and a control method thereof. This cold bed unloading finishing process production line includes: cooling the bed; the blanking device is connected with the output end of the cooling bed and comprises a plurality of discharging ends which are arranged at intervals along the material conveying direction of the blanking device; and the length direction of the finishing production line is vertical to the material conveying direction of the blanking device. The blanking device is arranged to convey rolled pieces to corresponding finishing production lines alternately through different discharging ends. The production line of the cold bed blanking finishing process can improve the production efficiency of small-specification rolled pieces.
Description
Technical Field
The invention belongs to the field of hot rolling production, and particularly relates to a cold bed blanking finishing process production line and a control method thereof.
Background
With the increase of the demand of rolled pieces in China, the rolled piece production line gradually develops to specialization, large-scale and economy. For example, the production scale of the bar production line is increased from 60 ten thousand tons in the first year to over 100 ten thousand tons, and the equipment capacity of the production line is greatly changed, so that the production capacity of the bar production line is greatly changed.
Among the prior art, along with the rolling completion of rolled piece, need carry to cool off on the cold bed through loading attachment, then pass through in proper order again: the production line comprises a blanking device, an output roller way, a fixed-length cold shearing device, a collecting device and the like, and finally the production of rolled pieces is finished. At present, for a bar production line, the production capacity improvement mainly depends on the sizing cold shearing equipment and the finishing capacity of the sizing cold shearing equipment. For the production line of large-size bars, the shearing capacity of the sizing cold shearing equipment is mainly determined by the shearing force of the sizing cold shearing equipment, and the shearing force of the shearing equipment of the large-size bar production line is increased from 6000kN to 10000 kN-12000 kN so as to meet the production requirement of the large-size bar production line. For the production line of small-sized bars, the shearing capacity of the sizing cold shearing equipment is mainly determined by the shearing count, namely the width of the shearing edge of the sizing cold shearing equipment is too large, so that the count of the small-sized bars is too large, the bars are easy to wind in the shearing process, and the shearing precision requirement is difficult to guarantee; and the width of the shear blade is too small, so that the production efficiency is directly reduced. Therefore, in the prior art, the cutting edge width of the fixed-length cold shearing equipment and the roller way widths of the blanking device, the delivery roller way and the collecting equipment corresponding to the front and the back of the fixed-length cold shearing equipment limit the production rate of small-sized rolled pieces, namely the production bottleneck of the whole production line.
Aiming at the defects of the prior art, a cold bed blanking finishing process production line is urgently needed by technical personnel in the field so as to improve the production efficiency of small-specification rolled pieces.
Disclosure of Invention
The invention aims to provide a production line of a blanking finishing process of a cooling bed, in order to improve the production efficiency of small-size rolled pieces.
The cold bed blanking finishing process production line comprises the following steps: cooling the bed; the blanking device is connected with the output end of the cooling bed and comprises a plurality of discharging ends which are arranged at intervals along the material conveying direction of the blanking device; and the length direction of the finishing production line is vertical to the material conveying direction of the blanking device. The blanking device is arranged to convey rolled pieces to corresponding finishing production lines alternately through different discharging ends.
Further, the blanking device comprises two discharge ends, and the blanking finishing process production line comprises two finishing production lines respectively connected with the two discharge ends.
Further, unloader includes: the first support frame is arranged on the fixed foundation and used for bearing a rolled piece; and at least one pushing device arranged on the first support frame and used for pushing the rolled piece to the corresponding discharging end, wherein the pushing device comprises: the first support frame is provided with a guide part and a material pushing part; and a first driving device for providing power for each material pushing part. The material pushing part can be driven by the first driving device to move to the positions of the two discharging ends.
Furthermore, the material pushing device comprises a plurality of material pushing parts which can synchronously reciprocate between the feeding end and any discharging end of the blanking device.
Further, the blanking device comprises two material pushing devices, wherein the material pushing part of one material pushing device can reciprocate between the feeding end and the discharging end of the blanking device, and the material pushing part of the other material pushing device can reciprocate between the feeding end and the discharging end of the blanking device.
Further, the finishing line includes: the output roller ways are correspondingly connected with the discharge ends of the blanking devices; the cold shearing equipment is connected with the output end of the output roller way; and a finishing device connected to the output of the cold shearing device.
Furthermore, the output roller way comprises a second support frame arranged on a fixed foundation, a plurality of roller ways arranged on the second support frame and used for transporting rolled pieces, and a plurality of second driving devices arranged on the second support frame and used for driving the roller ways to rotate individually or in groups. Wherein the second drive devices arranged in one finishing line and the second drive devices arranged in the other finishing line are respectively located on opposite sides of the two finishing lines away from each other.
Further, the cold shearing apparatus includes a shear gauge for measuring the length of the rolled piece and a cold shear or cold saw for shearing the rolled piece.
Further, the cold bed blanking finishing process production line further comprises an over-span collecting device which is arranged at the output ends of the two finishing production lines and is simultaneously connected with the two finishing production lines and used for collecting rolled pieces, or the cold bed blanking finishing process production line further comprises two over-span collecting devices which are arranged at the output ends of the two finishing production lines.
The invention also provides a control method for the production line of the cold bed blanking and finishing process, which comprises the following steps: controlling a material pushing part in the blanking device to synchronously reciprocate between a feeding end and any discharging end of the blanking device so as to respectively convey rolled pieces to corresponding finishing production lines; or controlling two material pushing devices in the blanking device, so that the material pushing part of one material pushing device reciprocates between the feeding end and one discharging end of the blanking device to convey the rolled piece to the corresponding first finishing production line, and the material pushing part of the other material pushing device reciprocates between the feeding end and the other discharging end of the blanking device to convey the rolled piece to the corresponding second finishing production line.
Compared with the prior art, the production line of the cold bed blanking finishing process can convey the groups of rods to different finishing production lines through one blanking device, so that the production line of the cold bed blanking finishing process can greatly improve the blanking and finishing capacity of the production line through less capital increase, the production scale of the production line is greatly improved, and the production efficiency and the economic benefit of the production line can be effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of a cold bed blanking finishing process production line according to an embodiment of the present invention;
FIG. 2 is a partial schematic view of the cold bed blanking finishing process line of FIG. 1 showing the connection of the blanking apparatus to the run-out table;
fig. 3 is a schematic structural diagram of the run-out table shown in fig. 2.
Detailed Description
For better understanding of the objects, structure and function of the present invention, the production line of the cold bed blanking finishing process of the present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 shows the structure of a cold bed blanking finishing process line 100 according to an embodiment of the present invention. As shown in fig. 1, the cold bed blanking finishing process line 100 includes: a cooling bed 1; the blanking device 2 is connected with the output end of the cooling bed 1, and the blanking device 2 comprises a plurality of discharging ends which are arranged at intervals along the material conveying direction of the blanking device; and a plurality of finishing production lines 3 respectively connected with the discharging ends, wherein the length direction of the finishing production lines 3 is vertical to the material conveying direction of the blanking device 2. Wherein, the blanking device 2 is arranged to alternately convey rolled pieces to the corresponding finishing production line 3 through different discharging ends.
When the cold bed blanking finishing process production line 100 of the embodiment of the present invention is used for production, rolled pieces with a certain length, such as bars, are unloaded onto the cold bed 1 after being rolled, the cold bed 1 cools the bars while stepping, and finally the bars are sent to the stepping chain device at the tail end of the cold bed 1 by the movable rack at the tail end of the cold bed rack of the cold bed 1 to be collected into groups, and when the number of the bars collected on the stepping chain reaches the number of the bars sheared by the cold shearing equipment 32 in the subsequent finishing production line 3, the grouped bars are conveyed to the finishing production line 3 by the blanking device 2. Referring to fig. 2, the blanking device 2 of the cold bed blanking finishing process line 100 according to the embodiment of the present invention is provided with a plurality of discharge ends, which can be understood as the positions where the blanking device 2 delivers groups of rods to the finishing line 3. The plurality of discharging ends form different conveying distances with the feeding end of the discharging device 2, so that a plurality of feeding time intervals are formed on the discharging device 2 of the cold bed discharging finishing process production line 100, that is, the discharging device 2 is formed with a plurality of steps. In this way, the blanking device 2 can continuously and alternately deliver groups of bars to the finishing line 3 corresponding to each step pitch, by means of a plurality of steps, for the subsequent finishing process. Through the arrangement, the cold bed blanking finishing process production line 100 provided by the embodiment of the invention can convey the groups of bars to different finishing production lines 3 through one blanking device 2, so that the cold bed blanking finishing process production line 100 provided by the embodiment of the invention can greatly improve the blanking and finishing capabilities of the cold bed blanking finishing process production line through less capital increase, the production scale of the production line is greatly improved, and the production efficiency and the economic benefit of the production line can be effectively improved. As can be seen from the specific production data, the cold bed blanking finishing process production line 100 of the embodiment of the invention can adapt to the high productivity of the rolling mill with the hourly output of 300 t/h.
In a preferred embodiment as shown in fig. 2, the blanking device 2 may comprise two discharge ends, and the blanking finishing process line 100 may comprise two finishing lines 3 connected to the two discharge ends, respectively. The cold bed blanking finishing process production line 100 of the embodiment of the invention preferably adopts an implementation mode of arranging two discharging ends and two finishing production lines 3, on one hand, the influence on the conveying efficiency due to the time difference generated between each step can be effectively reduced, so that the cold bed blanking finishing process production line 100 of the embodiment of the invention can effectively improve the production efficiency by nearly two times through arranging fewer discharging ends and finishing production lines 3; on the other hand, due to the fact that the size of each device and the size of each device are large, the occupancy rate of the plant can be effectively reduced, and the use space of the plant is saved. Of course, the number of discharge ends and finishing lines 3 can also be set according to the specific situation to meet more production requirements.
In a preferred embodiment as shown in fig. 2, the blanking device 2 may comprise: the first supporting frame 21 is arranged on the fixed foundation and used for bearing rolled pieces; and at least one pushing device 22 arranged on the first support frame 21 and used for pushing rolled pieces to the corresponding discharge end, wherein the pushing device 22 can comprise: a guide part 221 provided on the first support frame 21 and a material pushing part 222 provided on the guide part 221; and a first driving device 223 for powering each pusher 222. The pushing section 222 can be driven by the first driving device 223 to move to the two discharging end positions, i.e. the two step positions mentioned above. Specifically, the pushing portion 222 can move two strokes under the driving of the first driving device 223, for example, one is a long stroke and one is a short stroke, and the two strokes respectively correspond to two discharging ends, and the two discharging ends respectively correspond to two finishing lines 3. In this way, the pusher 222 can first convey the first group of bars to the first discharge end through a long stroke, and the finishing line 3 corresponding thereto can perform the subsequent finishing process. Then, the pusher 222 returns to the initial position and conveys the next group of rods to the other discharge end through a short stroke, and the finishing line 3 corresponding thereto performs the subsequent finishing process. The continuous and alternate delivery of groups of rods to two finishing lines 3 through the pusher 222 can effectively ensure the effective implementation of the cold bed blanking finishing process line 100 according to the embodiment of the present invention.
In a preferred embodiment, the pushing device 22 may include a plurality of pushing portions 222 capable of synchronously reciprocating between the feeding end and either of the discharging ends of the blanking device 2. Specifically, when the plurality of pushing portions 222 of the pushing device 22 works, the groups of bars can be continuously and alternately conveyed to the two finishing lines 3 at the same time, so that the stability in conveying the bars can be effectively improved.
In another preferred embodiment, the blanking device 2 may comprise two pushing devices 22. The material pushing part 222 of one material pushing device 22 can reciprocate between the feeding end and one discharging end of the blanking device 2, and the material pushing part 222 of the other material pushing device 22 can reciprocate between the feeding end and the other discharging end of the blanking device 2. Wherein, each pushing device 22 may include a plurality of pushing portions 222. Specifically, when the pushing sections 222 of the two pushing devices 22 are in operation, the first pushing device 22 may first convey the first group of rods to the finishing line 3 corresponding to the first discharging end. The second pusher 22 can then feed a second group of bars onto the finishing line 3 in correspondence with the second outfeed end. With this arrangement, the two pushing devices 22 can independently convey groups of bars to the corresponding finishing lines 3. In this way, after the first pushing device 22 puts the groups of rods on the corresponding finishing production line 3, the second pushing device 22 can continue to work without waiting for the first pushing device 22 to return to the initial position again, so that the time difference between different steps can be effectively shortened, and the conveying efficiency of the pushing device 22 is further improved.
Preferably, the pushing device 22 can be configured as a trolley pushing device or a chain feeding device. Specifically, when the pushing device 22 is configured to push materials in a trolley manner, the guiding portion 221 of the pushing device 22 may be configured as a sliding rail, and the pushing portion 222 may be configured as a pushing trolley slidably connected to the sliding rail, and the pushing trolley can move relative to the sliding rail under the driving of the first driving device 223 and can convey groups of bars to the corresponding finishing production line 3 at different pitches. When the pushing device 22 is configured as a chain feeding device, the guiding portion 221 of the pushing device 22 may be configured as a transmission bracket, and the pushing portion 222 may be configured as a transportation chain, and similarly, the transportation chain can transport the groups of rods on the transmission bracket to the corresponding finishing production line 3 at different pitches.
Of course, whether it is a trolley type material pushing device or a chain type material feeding device, the step pitch of the material pushing device 22 can be properly adjusted to facilitate the overall arrangement of the cold bed blanking finishing production line 100 of the embodiment of the invention. For example, the step distance can be increased by prolonging the length of a slide rail in sliding fit with the pushing trolley; or the step distance can be increased by extending the transmission bracket of the chain.
In a preferred embodiment as shown in fig. 1, the finishing line 3 may comprise: an output roller table 31 (shown in fig. 2) correspondingly connected with each discharging end of the blanking device 2; a cold shearing device 32 connected to the output end of the run-out table 31; and a finishing device (not shown) connected to the output of the cold shears device 32. Among these, the run-out table 31, the cold shearing apparatus 32 and the finishing apparatus should be understood to have the same technical effects as those achieved by the respective apparatuses in the related art. It should be noted that the specific width of the run-out table 31 can be determined by the final hour output of the cold bed blanking finishing line 100 and the cutting edge width of the cold shearing device 32 according to the embodiment of the present invention, and is not limited herein.
In a preferred embodiment as shown in fig. 3, the run-out table 31 may include a second support frame 311 disposed on a fixed base, a plurality of table tables 312 disposed on the second support frame 311 for transporting rolled pieces, and a plurality of second driving devices 313 disposed on the second support frame 311 for driving the respective table tables 312 to rotate individually or in groups. Wherein each second driving device 313 provided in one finishing line 3 and each second driving device 313 provided in another finishing line 3 are respectively located at opposite sides (shown in connection with fig. 3) of the two finishing lines 3 away from each other. Through the arrangement, on one hand, the arrangement distance between the roller ways 312 of the two run-out roller ways 31 can be shortened, so that the time difference between different step distances can be effectively shortened, and the time interval of the bars on the two run-out roller ways 31 during transportation can be shortened; on the other hand, the occupied space of the overall layout of the run-out table 31 can be minimized, which is helpful for the overall layout of the cold bed blanking finishing production line 100 and the improvement of the utilization rate of the factory space.
In a preferred embodiment, as shown in FIG. 1, the cold shears apparatus 32 may include a sizer 321 for measuring the length of the product, and a cold shear 322 or cold saw 322 for shearing the product. Wherein, the cold shearing device 32 on the two finishing production lines 3 can use the cold shearing machine 322 or the cold sawing machine 322 at the same time, and can also use the cold shearing machine 322 and the cold sawing machine 322 respectively. Also preferably, the driving manner of the cold shears 322 may be electric driving or hydraulic driving. It should be noted that the shearing force and the width of the shearing edge of the cold shears 322 can be determined according to the final output of the cold bed blanking finishing line 100. It is also preferable that the shearing force of the cold shearing apparatus 32 or the width of the shearing edge of the cold shearing apparatus 32 is appropriately reduced and the weight of the cooling bed 1, the run-out table 31 and the cold shearing apparatus 32 is reduced when the production line production is 120 ten thousand tons or more, and that more processes and facilities are possible for the subsequent production increase by using the facilities within the most reasonable range without increasing the total facility weight.
In a preferred embodiment as shown in fig. 1, the cold bed blanking finishing process line 100 may further include one overspan collection device 4 for collecting the rolled product disposed at the output end of the two finishing lines 3 while being connected to the two finishing lines 3, or the cold bed blanking finishing process line 100 may further include two overspan collection devices 4 disposed at the output end of the two finishing lines 3. The cross-over collecting device 4 is understood to be the same as the collecting device in the prior art, for example, the functions of automatic counting, automatic packing, automatic label hanging and short-length removing can be realized.
The invention also provides a control method for the production line 100 of the cold bed blanking and finishing process. The control method comprises the following steps: controlling a material pushing part 222 in the blanking device 2 to synchronously reciprocate between the feeding end and any one of the discharging ends of the blanking device 2 so as to respectively convey the rolled pieces to the corresponding finishing production lines 3; or controlling two material pushing devices 22 in the blanking device 2, so that the material pushing part 222 of one material pushing device 22 reciprocates between the feeding end and one discharging end of the blanking device 2 to convey the rolled piece to the corresponding first finishing line 3, and the material pushing part 222 of the other material pushing device 22 reciprocates between the feeding end and the other discharging end of the blanking device 2 to convey the rolled piece to the corresponding second finishing line 3. In combination with the above, the control method for the cold bed blanking finishing process production line 100 of the present invention can effectively improve the production efficiency of the cold bed blanking finishing process production line 100 of the embodiment of the present invention.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. A cold bed blanking finishing process production line is characterized by comprising the following steps:
cooling the bed;
with the unloader that the output of cold bed links to each other, unloader includes two at least discharge ends that set up at the interval in its defeated material direction of edge, unloader is formed with a plurality of steps, unloader includes: the first support frame is arranged on the fixed foundation and used for bearing a rolled piece; and the at least one material pushing device is arranged on the first support frame and used for pushing the rolled piece to the corresponding discharge end, and the material pushing device comprises: the first support frame is provided with a guide part and a material pushing part; the first driving device is used for providing power for each material pushing part; and
at least two finishing production lines respectively connected with the discharge ends, wherein the length direction of the finishing production lines is perpendicular to the material conveying direction of the blanking device, the blanking device is arranged to convey rolled pieces to the corresponding finishing production lines alternately through the different discharge ends, and the finishing production lines comprise: the output roller ways are correspondingly connected with the discharge ends of the blanking devices; the cold shearing equipment is connected with the output end of the output roller way; and a finishing device connected to the output of the cold shearing device; the run-out roller way comprises a second support frame arranged on a fixed foundation, a plurality of roller ways arranged on the second support frame and used for transporting rolled pieces, and a plurality of second driving devices arranged on the second support frame and used for driving the roller ways to rotate individually or in groups, wherein each second driving device arranged in one finishing production line and each second driving device arranged in the other finishing production line are respectively positioned on the opposite sides of the two finishing production lines, which are far away from each other;
the material pushing part can move to the positions of the two discharging ends under the driving of the first driving device.
2. The cold bed blanking finishing process production line of claim 1, wherein the pusher comprises a plurality of pushers capable of reciprocating synchronously between a feed end of the blanking device and any one of the discharge ends.
3. The cold bed blanking finishing process production line of claim 1, wherein the blanking device comprises two of the material pushing devices, wherein the material pushing portion of one of the material pushing devices is capable of reciprocating between a feeding end of the blanking device and one of the discharging ends, and the material pushing portion of the other material pushing device is capable of reciprocating between the feeding end of the blanking device and the other of the discharging ends.
4. The cold bed blanking finishing process production line of claim 1, wherein the cold shears apparatus includes a sizer for measuring a length of the rolled stock and a cold shear or cold saw for shearing the rolled stock.
5. The cold bed discharge finishing process line according to any one of claims 1 to 3, further comprising one over-span collecting device for collecting a rolled piece provided at an output end of both of the finishing lines and connected to both of the finishing lines at the same time, or further comprising two over-span collecting devices provided at an output end of both of the finishing lines.
6. A control method for a cold bed blanking finishing process line according to any one of claims 1 to 5, characterized by comprising:
controlling a material pushing part in the blanking device to synchronously reciprocate between a feeding end and any one discharging end of the blanking device so as to respectively convey rolled pieces to corresponding finishing production lines; or
And controlling two material pushing devices in the blanking device to enable a material pushing part of one material pushing device to reciprocate between the feeding end and one discharging end of the blanking device so as to convey the rolled piece to a corresponding first finishing production line, and enabling a material pushing part of the other material pushing device to reciprocate between the feeding end and the other discharging end of the blanking device so as to convey the rolled piece to a corresponding second finishing production line.
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| CN201910920296.1A CN110695101B (en) | 2019-09-26 | 2019-09-26 | Cold bed blanking finishing process production line and control method thereof |
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| DE3818745A1 (en) * | 1988-05-30 | 1989-12-14 | Mannesmann Ag | Working method for the prevention of deformations of rolled sections |
| JP2688107B2 (en) * | 1990-05-31 | 1997-12-08 | 新日本製鐵株式会社 | Plate manufacturing equipment |
| ITMI20050315A1 (en) * | 2005-03-02 | 2006-09-03 | Danieli Off Mecc | COMPACT PLANT FOR THE CONTINUOUS PRODUCTION OF E-O PROFILE BARS |
| CN201120403Y (en) * | 2007-09-28 | 2008-09-24 | 鞍钢集团设计研究院 | Apparatus baiting on double-side of steel tube cooling table |
| CN102744560A (en) * | 2012-07-17 | 2012-10-24 | 安徽中杭股份有限公司 | Finishing method for straightening small and medium-sized angle steel double-line long ruler |
| CN204486482U (en) * | 2015-03-09 | 2015-07-22 | 重庆钢铁集团设计院有限公司 | Cold bed blanking device |
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