CN109465304B - Steel billet centering device - Google Patents
Steel billet centering device Download PDFInfo
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- CN109465304B CN109465304B CN201811440481.2A CN201811440481A CN109465304B CN 109465304 B CN109465304 B CN 109465304B CN 201811440481 A CN201811440481 A CN 201811440481A CN 109465304 B CN109465304 B CN 109465304B
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- push rods
- rod
- push rod
- rods
- middle push
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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
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
Abstract
The invention relates to a billet centering device, which comprises a pair of front push rods, a pair of middle push rods and a pair of rear push rods, wherein the front push rods are positioned at the upstream of the middle push rods, the middle push rods and the rear push rods are respectively positioned at the inlet side and the outlet side of a descaling box, the tail ends of the front push rods, the middle push rods and the rear push rods are respectively provided with a top wheel capable of stretching along the length direction of a rod body, the restoring force of the top wheels in the length direction of the rod body is provided by a main spring, the top wheels of the front push rods deflect towards the upstream, the included angle between the front push rods and the vertical line of the central line of a roller way is α, the top wheels of the middle push rods deflect towards the upstream, the included angle between the middle push rods and the central line of the roller way is β to be larger than β, the rear push rods are perpendicular to the central line of the roller way and have a width of W, when the billet is not contacted with the billet, the tail ends of the rear push rods, the tail ends of.
Description
Technical Field
The invention belongs to the field of hot rolling and conveying, and particularly relates to a billet centering device.
Background
And after the hot continuous rolled steel billet is discharged from the heating furnace, the hot continuous rolled steel billet is conveyed through a roller way, enters a descaling box to remove iron oxide scales and then enters a hot continuous rolling mill for rolling. In the process, the situation that the steel billet is misaligned can occur, the most serious deviation result can cause the hot continuous rolling mill to pile steel so as to damage equipment, although the side guide plate of the rolling mill has the function of guiding and centering, the side guide plate has little serious deviation function, and even can damage the side guide plate under huge impact force.
The deviation of the steel billet is caused by various factors, such as the levelness of a conveying roller, the steel billet is not centered due to the camber and the wedge of the steel billet, and the steel billet is returned mainly by adding a centering device at present.
The centering device is structurally characterized in that telescopic rods are respectively arranged on two sides of a steel billet, and the aim of centering the steel billet is fulfilled by pushing rod pieces, so that the method has the following problems: 1) the push rod is only used when the billet reaches a preset position, so that the length of a production line is lengthened due to the existence of the centering device, the centering device is particularly untimely for a newly designed steel mill, and the centering device does not accord with the current short-flow steel rolling trend; 2) corresponding servo mechanisms must be equipped for synchronization with the steel billet, meanwhile, the end part of the push rod can be damaged by strong friction in the centering process, no buffer exists in the whole centering process, and the method is a great test for the service life of equipment.
Disclosure of Invention
The invention aims to provide a steel billet centering device which realizes the steel billet deviation centering with large offset, reduces the length of a production line, can buffer the collision of steel billets and is easy to maintain.
The technical scheme adopted by the invention is as follows:
a steel billet centering device comprises a pair of front push rods, a pair of middle push rods and a pair of rear push rods, wherein the front push rods are positioned at the upper streams of the middle push rods, the middle push rods and the rear push rods are respectively positioned at the inlet sides and the outlet sides of a descaling box, the tail ends of the front push rods, the middle push rods and the rear push rods are respectively provided with a top wheel capable of stretching along the length direction of a rod body, the restoring force of the top wheel in the length direction of the rod body is provided by a main spring, the top wheel of the front push rods deviates to the upper streams, the included angle between the front push rods and the vertical line of the central line of a roller way is α, the included angle between the top wheel of the middle push rods and the vertical line of the central line of the roller way is β and is larger than β, the rear push rods are perpendicular to the central line of the roller way, the width of a steel billet is.
Furthermore, the front push rod, the middle push rod and the rear push rod respectively comprise a rod body, a supporting rod, a top wheel and a main spring, the top wheel is installed at one end of the supporting rod, the other end of the supporting rod extends into the rod body, and the main spring is located in the rod body and applies axial force to the supporting rod.
Furthermore, the front push rod, the middle push rod and the rear push rod respectively comprise side springs, and the parts, located in the rod body, of the side springs sleeved on the supporting rods exert radial force on the supporting rods.
Furthermore, the top wheels of the front push rod and the middle push rod are all cylinders, and the top wheel of the rear push rod is a cylinder.
Furthermore, the middle push rods and the rear push rods are respectively provided with a baffle, when the two middle push rods are close to each other, the baffles on the two middle push rods are close to each other and partially overlapped to block the inlet side of the descaling box, and when the two rear push rods are close to each other, the baffles on the two rear push rods are close to each other and partially overlapped to block the outlet side of the descaling box.
Furthermore, the front push rod, the middle push rod and the rear push rod are respectively connected with a motor used for adjusting the angle between the front push rod, the middle push rod and the middle line of the roller way.
Further, when the steel billet is not contacted, the distance between the middle push rod and the center line of the roller way is 1.02-1.008 times of W/2.
The invention has the beneficial effects that:
the device adopts progressive centering (the top wheel is compressed when the steel billet deviates to one side, when the steel billet stops deviating, the main spring provides restoring force for the top wheel, the restoring force plays a role in correcting deviation, so that the steel billet gradually returns to a position close to the central line of a roller way, the steel billet gradually draws close to the central line of the roller way through a front push rod and a middle push rod, and final centering is finished when the steel billet reaches a rear push rod), thereby realizing the deviation centering of the steel billet with large deviation; the device and the descaling box are arranged simultaneously, so that the length of a production line can be effectively reduced, the temperature drop in the steel billet transportation process is reduced, the subsequent production is not influenced, and the device is particularly suitable for steel billet centering of a short-flow production line, in particular to a thin slab continuous casting and rolling production line; the device adopts multi-point deviation correction, so that the collision of the steel billet can be effectively buffered, the influence of the steel billet being straightened and bent caused by single-point deviation correction is reduced, and the use faults of equipment are reduced; the device does not need to synchronize the movement of the billet during deviation correction, has few control components and is easy to maintain.
Drawings
FIG. 1 is a schematic diagram of the operation of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a front push rod, a middle push rod and a rear push rod in the embodiment of the invention.
Fig. 3 is a partially enlarged view of fig. 1.
In the figure: a-roller way central line; 1-a steel billet; 2-front push rod; 3-a middle push rod; 4-descaling box; 5-rear push rod; 6, a motor; 7-a top wheel; 8-a strut; 9-side spring; 10-a main spring; 11-a rod body; 12-left baffle; 13-right baffle.
Detailed Description
The invention is further described below with reference to the figures and examples.
As shown in figure 1, the billet centering device comprises a pair of front push rods 2, a pair of middle push rods 3 and a pair of rear push rods 5 which are symmetrical about a roller way center line a, the front push rods 2 are positioned at the upstream of the middle push rods 3, the middle push rods 3 and the rear push rods 5 are respectively positioned at the inlet side and the outlet side of a descaling box 4, the tail ends of the front push rods 2, the middle push rods 3 and the rear push rods 5 are respectively provided with a top wheel 7 which can stretch out and draw back along the length direction of a rod body, restoring force of the top wheel 7 in the length direction of the rod body is provided by a main spring 10, the top wheel 7 of the front push rods 2 deviates towards the upstream, the angle between the front push rods 2 and the roller way center line a is α, the top wheel 7 of the middle push rods 3 deviates towards the upstream, the angle between the middle push rods 3 and a vertical line of the roller way center line a is β larger than β, the rear push rods 5 are perpendicular to the roller way center line a, the width of the billet 1 is W, when the centering device is not in contact with the billet 1, the billet, the rear push rods 3 and the tail ends of the rear push rods 5 and the front push rods 5 and the middle push rods 5 to the center line a, the middle push rods 5 to the center line a, the billet, the distance between the tail ends of the rear push rods 5 to the billet 5 to the center line a middle push rods 5 to the center line a is gradually increase, the middle push rods 5 to the center line a to reduce the billet, the billet.
As shown in fig. 2, in the present embodiment, each of the front push rod 2, the middle push rod 3, and the rear push rod 5 includes a rod body 11, a support rod 8, a top wheel 7, and a main spring 10, the top wheel 7 is installed at one end of the support rod 8, the other end of the support rod 8 extends into the rod body 11, and the main spring 10 is located in the rod body 11 and applies an axial force to the support rod 8. The elasticity of the main spring 10 is much larger than the friction force between the billet 1 and the roller way, in this embodiment, the stiffness k of the main spring 10, the friction force f of the billet 1 is G μ, where G is the weight of the billet 1, μ is the sliding friction coefficient, the expansion length X of the main spring 10, KX is af, where a is 5-10, and when the billet 1 stops shifting to one side, the billet 1 will gradually return to a position close to the roller way centerline a under the action of the main spring 10.
In the present embodiment, as shown in fig. 2, the front push rod 2, the middle push rod 3 and the rear push rod 5 each further include a side spring 9, and the side spring 9 is sleeved on the strut 8 and located in the rod body to apply a radial force to the strut 8
The side spring 8 can counteract the horizontal impact force of the billet 1 and plays a role of protecting the push rod, and in the embodiment, the rigidity K of the side spring 91The side spring 9 adopts a telescopic length X1，K1X1＝a1f in which a1＝3～4。
As shown in fig. 1, in the present embodiment, the front push rod 2 and the top wheel 7 of the middle push rod 3 are both elliptical cylinders, and the top wheel 7 of the rear push rod 5 is a cylinder. The top wheels 7 of the front push rod 2 and the middle push rod 3 are elliptical cylinders, so that the deviation rectifying effect can be improved, the billet 1 can be continuously close to the central line a of the roller way under the action of inertia, the top wheels 7 of the rear push rod 5 are cylinders, and the billet 1 is basically centered at the moment without extra rectification.
As shown in fig. 1 and 3, in the present embodiment, the middle push rods 3 and the rear push rods 5 are respectively provided with the baffle plates (12 and 13), when the two middle push rods 3 approach, the baffle plates (12 and 13) on the two middle push rods 3 approach each other and partially overlap each other to block the inlet side of the descaling box 4, and when the two rear push rods 5 approach, the baffle plates (12 and 13) on the two rear push rods 5 approach each other and partially overlap each other to block the outlet side of the descaling box 4. When the descaling box 4 works, high-pressure water is adopted to wash the surface of the billet 1, and the baffles (12 and 13) are arranged to prevent the high-pressure water from splashing, so that a water retaining curtain is omitted, energy is saved, and equipment maintenance is facilitated.
As shown in fig. 1, in this embodiment, the front push rod 2, the middle push rod 3, and the rear push rod 5 are respectively connected to a motor 6 for adjusting the angle between the front push rod 2 and the roller bed centerline a, so as to facilitate fine adjustment and control of the angle.
In the embodiment, when the steel billet 1 is not contacted, the distance between the middle push rod 3 and the center line a of the roller way is 1.02-1.008 times of W/2.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (7)
1. A steel billet centering device is characterized by comprising a pair of front push rods, a pair of middle push rods and a pair of rear push rods, wherein the front push rods are symmetrically arranged on the center line of a roller way, the front push rods are positioned at the upstream of the middle push rods, the middle push rods and the rear push rods are respectively positioned at the inlet side and the outlet side of a descaling box, the tail ends of the front push rods, the middle push rods and the rear push rods are respectively provided with a top wheel which can stretch out and draw back along the length direction of a rod body, the restoring force of the top wheels in the length direction of the rod body is provided by a main spring, the top wheels of the front push rods deflect to the upstream, the included angle between the front push rods and the vertical line of the roller way is α, the top wheels of the middle push rods deflect to the upstream, the included angle between the middle push rods and the center line of the roller way is β and larger than β, the rear push rods are.
2. The steel billet centering device of claim 1, wherein: the front push rod, the middle push rod and the rear push rod respectively comprise a rod body, a supporting rod, a top wheel and a main spring, the top wheel is installed at one end of the supporting rod, the other end of the supporting rod stretches into the rod body, and the main spring is located in the rod body and applies axial force to the supporting rod.
3. The billet centering device of claim 2, wherein: the front push rod, the middle push rod and the rear push rod respectively comprise a side spring, and the part, located in the rod body, of the side spring sleeve on the supporting rod exerts radial force on the supporting rod.
4. The steel billet centering device of claim 1, wherein: the top wheels of the front push rod and the middle push rod are all elliptical cylinders, and the top wheel of the rear push rod is a cylinder.
5. The steel billet centering device of claim 1, wherein: the middle push rods and the rear push rods are respectively provided with a baffle, when the two middle push rods are close to each other, the baffles on the two middle push rods are close to each other and partially overlapped to block the inlet side of the descaling box, and when the two rear push rods are close to each other, the baffles on the two rear push rods are close to each other and partially overlapped to block the outlet side of the descaling box.
6. The steel billet centering device of claim 1, wherein: the front push rod, the middle push rod and the rear push rod are respectively connected with a motor used for adjusting the angle between the front push rod, the middle push rod and the rear push rod and the angle between the front push rod, the middle push rod and the roller way.
7. The steel billet centering device of claim 1, wherein: when the middle push rod is not in contact with the billet, the distance between the middle push rod and the center line of the roller way is 1.02-1.008 times of W/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811440481.2A CN109465304B (en) | 2018-11-28 | 2018-11-28 | Steel billet centering device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811440481.2A CN109465304B (en) | 2018-11-28 | 2018-11-28 | Steel billet centering device |
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| CN109465304A CN109465304A (en) | 2019-03-15 |
| CN109465304B true CN109465304B (en) | 2020-08-04 |
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| CN201811440481.2A Active CN109465304B (en) | 2018-11-28 | 2018-11-28 | Steel billet centering device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109880997A (en) * | 2019-04-12 | 2019-06-14 | 扬州恒润海洋重工有限公司 | A kind of heating furnace tapping buffer unit |
| CN111872136B (en) * | 2020-07-07 | 2022-05-27 | 南京高精工程设备有限公司 | High-speed rolling mill set for micro-tension full-continuous special steel bar |
| CN116788759B (en) * | 2023-08-28 | 2023-11-10 | 常州奥普恩自动化科技有限公司 | Rubber belt conveying device and conveying method for underground coal mine |
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| CN201186298Y (en) * | 2008-03-05 | 2009-01-28 | 宝山钢铁股份有限公司 | Steel-pulling device for band steel error-correcting process |
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| CN105188973A (en) * | 2012-12-28 | 2015-12-23 | Sms集团有限公司 | Device and method for laterally guiding a rolled or cast product on a transport track |
| KR20160149526A (en) * | 2015-06-18 | 2016-12-28 | 주식회사 포스코 | Apparatus of side guide |
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| CN208098902U (en) * | 2018-03-20 | 2018-11-16 | 江门市中钢金属材料有限公司 | A kind of milling train with positioning device |
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| JPH10193009A (en) * | 1997-01-13 | 1998-07-28 | Hitachi Cable Ltd | Bend straightening device of metallic hoop |
| JP5482331B2 (en) * | 2010-03-15 | 2014-05-07 | Ｊｆｅスチール株式会社 | Thick plate shearing equipment and method for preventing meandering of steel plate |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201186298Y (en) * | 2008-03-05 | 2009-01-28 | 宝山钢铁股份有限公司 | Steel-pulling device for band steel error-correcting process |
| CN105188973A (en) * | 2012-12-28 | 2015-12-23 | Sms集团有限公司 | Device and method for laterally guiding a rolled or cast product on a transport track |
| CN203526219U (en) * | 2013-09-24 | 2014-04-09 | 河北钢铁股份有限公司唐山分公司 | Automatic centering device for roller bottom heating furnace plate blank |
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