CA2048127C - Process for coiler drum alternation in incessant hot rolling and apparatus therefor - Google Patents
Process for coiler drum alternation in incessant hot rolling and apparatus thereforInfo
- Publication number
- CA2048127C CA2048127C CA002048127A CA2048127A CA2048127C CA 2048127 C CA2048127 C CA 2048127C CA 002048127 A CA002048127 A CA 002048127A CA 2048127 A CA2048127 A CA 2048127A CA 2048127 C CA2048127 C CA 2048127C
- Authority
- CA
- Canada
- Prior art keywords
- pinch rolls
- coiler
- steel strip
- hot rolling
- strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/02—Winding-up or coiling
- B21C47/04—Winding-up or coiling on or in reels or drums, without using a moving guide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
-
- 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
- B21B2015/0057—Coiling the rolled product
-
- 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
- B21B39/006—Pinch roll sets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
Disclosed herein is a process for coiler drum alternation in incessant hot rolling in which continual finish hot rolling of rough-rolled sheet bars united on the entry side of a finishing hot rolling mill is carried out by tilting upper and lower tillable pinch rolls disposed on the exit side of a shear on the downstream of the finishing mill, thereby changing the traveling direction of the steel strip so that a leading end formed upon cutting the strip will be directed toward the next coiler drum to be used, and thereafter cutting the strip. This process enables an easy and assured alternation of coiler drums, thereby contributing to increases in the speed and efficiency of incessant hot rolling.
Description
2048 1 27 ~ -~
PROCESS FOR COILER DRUM ALTERNATION IN TN
l~OT ROLLING AND APPARATUS THEREFOR
BA~:K~i~wNL) OF TE~E INVENTION
(1) Field of the Invention This invention relates to a process for coiler drum alternation in; nl~P~Ant hot rolling of steel strip and to an apparatus therefor.
PROCESS FOR COILER DRUM ALTERNATION IN TN
l~OT ROLLING AND APPARATUS THEREFOR
BA~:K~i~wNL) OF TE~E INVENTION
(1) Field of the Invention This invention relates to a process for coiler drum alternation in; nl~P~Ant hot rolling of steel strip and to an apparatus therefor.
(2) Prior Technology By the term "; n~ Ant hot rolling" herein is meant a system in which preceding ones and succeeding ones of rough rolled slabs are joined together one after another by a f lying welder on the entry side of a finishing hot rolling mill, and the joined slabs are subjected continually to finish hot rolling to produce a steel strip.
In hot rolling lines, conventionally, rolling of steel strips has been carried out by the batch rolling system. That is to say, it has been a common practice to rough roll the rolling stocks one by one to make sheet bars, finish roll the sheet bars to steel strips, and take up the steel strips by coilers, respectively.
In order to moderate the impact load at an actual nip of the rolls for gripping the rough rolled sheet bar into the finish rolling mill, in the batch rolling system, it has l~een necessary to limit the traveling speed of the sheet bar at the actual nip. In addition, it has also been npcp~ ry to vary the rolling speed, for controlling the plate thickness and shape of the head and tail ends of the rolled product. In the finish rolling of thin sheets, in particular, the traveling speed of the steel strip has been controlled to or below a predetermined value until the leading end of the strip starts being wrapped around the mandrel of the coiler, so as to prevent the leading end portion f rom being lif ted while traveling . Thus, the batch rolling system has the drawback of varied rolling speeds and low rolling efficiency. In addition, the batch rolling system involves waste of time in, for example, peparatory operations between the rolling of a preceding rolling stock and the rolling of the following rolling stock, leading to low efficiency in using the equipment.
Furthermore, there has been the problem that the finish rolled product~ are liable to have poor shape at the head and tail ends thereof, resulting in a low production efficiency, and so on.
2 0 4 8 1 2 7 727,4-18 For solving these problems, ;nc~Ant hot rolling is adopted. In the incessant hot rolling, the steel strip obtained by continual rolling of joined slabs is cut up by a flying shear into lengths of strip corresponding to the initial slabs, followed by coiling by coilers. It is necessary in this case to change over the path of the steel strip 80 that the leading ends of the cut lengths of strip are guided to be taken up on the respective coiler drums. Techniques for such coiler drum alternation are disclosed in Japanese Patent rJn~yr~ne~l Publlcation(KoKAI) No. 61-014003 (1986) (Process for Down-Coiler Alternation in Tn~ sAnt ~Iot Rolling) and Japanese Patent rln~yAmln~d Publication (KOKAI) No. 61--119326 (1986) (Gate Device for RollingLine Alternation).
According to the Japanese Patent T~n~Y~m1n~d Pub-lication (KOKAI) No. 61-119326 (1986), a deflector disposed on the entry side of coiler rolls is moved up and down to achieve alternation of coilers. The up-down motion of tl~e deflector may flaw the steel strip. To avoid the formation of flaws, the deflector is provided with ;IllY; 1 ~A,ry rollers. Since the auxiliary rollers are to be arranged in a limited space, however, the rollers should be small in diameter and, due to the small roller ~ 2048 1 27 7~'15~
diameter, a slight deviation in the position of contact of the roller with the steel strip can render the strip guidillg direction unstable, making it impossible to coil the strip. In the technique according to the Japanese Patent Un~ m~n~d Publication (RORAI) No. 61-014003 (1986~, on the other hand, each coiler is provided with a main and an auxiliary set of pinch rolls, which are operated to achieve coiler arum alternation. This technique requires a complicated mechanism.
SUM~IARY QF TEIE INVENTION
It is attempted in this invention to enable higher-speed alternation of coiler drums for coiling of cut steel strips in incessant hot rolling, one b~ one, and to achieve higher productivity; ena~le an easy and assured change of direction so as to guide the leading end of a cut steel strip toward the next coiler to be used; and to enable changeover from a coiler on the downstream side to a coiler on the up-stream side.
This invention makes an implu~/~ L on the alternation of coiler drums ~or a traveling steel strip in incessant hot rolling, by adopting the follow-ing process. The process for coiler drum alternation in incessant hot rolling comprises the steps of oscil-lating upper and lower tiltable pinch rolls disposed on the exlt side of a shear, thereby changing the direction ~ 2~8~ ~7 of the steel strip so that a leading end formed upon cutting the strip is directed toward the coiler drum to be used next, and cutting the steel strip The present invention also provides an apparatus adapted to the process mentioned above. The apparatus comprises upper and lower pinch rolls for nipplng a steel strip therebetween on an entry side of a coller ln the apparatus, a frame for ;'r~ ting the pinch rolls, the frame being supported at a lower end thereof on a pin so that a line connecting the centers of the upper and lower pinch rolls can be tilted with respect to a traveling direction of the steel strip, and means for tilting the frame Oll the pin.
BRIEF DES( ~ I I''l' l ~)N OF TE~E DRAWIMGS
Figure 1 is an illustration of an alternation apparatus preferable for carrying out this invention;
Figure 2 is an illustration of an alternation process according to this invention, in the case of change-over :from a coiler on a downstream side to a coiler on an upstream slde;
Figure 3-_is an illustration of changeover from a coiler on an upstream side to a coiler on a downstream side;
Figure 4 is an illustration of an exemplary system according to the prior art; and Figure 5 is a general view of a hot rolling line .
DESCRIPTION OF PREFERRED E~IBODIMENTS OF TEIE INVENTION
Figure 5 illustrates the entire steps carried out in a hot rolling line. A steel slab 90 is rough rolled by hot roughing mills 50, to become a sheet bar 95. The sheet bar 95 is finish rolled by hot fin;~hing stands 60 into an elongate steel strip 100. In the conventional batch rolling system, the sheet bars 95 are finish rolled one by one, and the resultant steel strips are coiled by coilers 30 one by one ( each strip being coiled on one of coiler drums). After one steel strip is t,~ken up on one coiler drum, in the conventional batch rolling system, there is suf f icient time for such a pr~paratory operation as to enable the next steel stri]p to be coiled on another coiler drum.
In the i n~ss~nt hot rolling to which this invention is applied, a welder 70 for joining the sheet bars 95 is provided between the roughing mills 50 and the finishing stands 60, 80 as to joint the leading end 2048 1 2' of tlle succeeding sheet bar to the tail end of the preceding sheet bar. Therefore, the hot f;niflh;ng stands 60 performs continual rolling of a multiplicity of sheet bars 95 joined together. Since the joined body of sheet bars 95 finish rolled continually in this manner has discontinuity only at the foremost and backmost ends, it is possible to carry out high-speed fini~h rolling, without any complicated modification of rolling speed.
After the continual finish rolling, the steel stri]? 100 is cut at the joint portions thereof by a shear 80, and the cut lengths of strip are coiled separately by the coilers 30. For the cutting of the steel strip 100 during the highspeed rolling and for alternation of the coilers 30 in preparation for the next coiling operation, the path for the steel strip should be changed assuredly at high speed.
Figure 4 shows an apparatus according to the prior art, in which pinch rolls 40, 42 can be moved farther apart, and a deflector 44 capable of being moved up and down is provided on the entry side of coiler drums 30a, 30b so as to change the traveling direction of the steel strip 100. The deflector 44 is provided with auxiliary rollers 48 small in diameter. In this 2048 1 ~7 conventional apparatus, a slight deviation in the position of contact of the strip lO0 with the roller 48 can render the strip guiding direction unstable, making it ilrlpossible to coil the strip.
Figure 1 is an illustration of the apparatus for coiler drum alternation accordlng to this invention. In the L~rocess for coiler drum alternation in incessant hot rolling according to thi8 invention, rough-rolled sheet bars are jointed end to end at a position on the entry side of the finishing stands, the jointed sheet bars are conti.nually hot rolled in the fin;~hin~ stands, the resultant steel strip is cut up on the entry side of coilers, and the cut lengths of strip are successively coiled, in an alternating manner, on a plurality of coilers arranged in series.
In Figure 1, upper and lower pinch rolls 10 and 12 are placed in a housing 14. The housing 14 is 50 desiglned as to be tilted by a hydraulic cylinder 16. To coil a steel strip 100 by a coiler 30, the housing 14 is tilted by the hydraulic cylinder 16 80 that the center line 22 passing through the centers of the upper and lower pinch rolls 10, 12 is tilted as indicated by 22a, and a deflector 18 is directed to the side of the coiler 30, whereby the strip lO0 i5 coiled.
At the time of coiling by a coiler on the downstream side, the housing 14 is returned into the solid-line position in Figure 1, and the deflector 18 into the position for directing downstream.
The process for coiler drum alternation is illustrated in Figures 2 and 3. Figure 2 shows the changeover from a coiler 30b on the downstream side to a coiler 30a on the upstream side. To make a changeover from the coiling of the steel strip 100 by the downstream-side coiler 30b to that by the upstream-side coiler 30a, a housing 14 on the upstream side is tilted so that the center line passing through the centers of the upper and lower pinch rolls lOa, 12a is tilted, the upstream-side coiler 30a is set ready for coiling, and the 3teel strip 100 is cut by the shear 80. In this case, the upper and lower pinch rolls lOb, 12b of the downstream-side coiler 30b may be in the non-tilted condition. It is thereby poasible to maintain a tail end ]portion of the steel strip lOOb securely by the pinc]h rolls lOb, 12b until the coiling of the strip lOOb is finished, and to obtain a better coil form.
Figure 3 shows a changeover from the coiler 30a on t]he upstream aide to the coiler 30b on the downstream side .
_g _ To make a changeover f rom the coiling of a steel strip lOOa by the upstream-side coiler 30a to the coiling of a steel strip lOOb by the downstream-side coiler 30b, the housing 14b on the downstream side i8 tilted so that the center line pa6sing through the centers of the upper and lower pinch rolls lOb, 12b of the downstream-side coiler 14b is tilted, and the downstream-side coiler 30b is set ready for coiling. In this case, the center line passing through the centers of the upper and lower pinch rolls lOa, 12a of the upstream-side coiler 30a i8 kept untilted. The steel strip 100 is cut by the shear while the upper pinch roll lOa of the upstream-side coiler 30a is thus prevented from exerting a downward bending force on the succeeding portion of strip. Upon the cutting of the steel strip 100, the succeeding portion of strip is moved straight ahead to be caught by the pinch rolls lOb, 12b on the downstream side, and is wrapped around the downstream-side coiler 30b.
This invention produces the following excellent ef f ects:
(1) The need for a deflector with a complicated construction, as in the prior art, is eliminated.
-2048~ 27 .
(2) The tail end of the preceding steel strip can be clamped by the upper pinch roll.
( 3 ) The head end of the succeeding steel strip can be guided by the upper pinch roll.
(4) It is sufficient to provide the coiler on the upstream side with only one set of pinch rolls, as contrasted to two sets of pinch rolls required according to the prior art.
In hot rolling lines, conventionally, rolling of steel strips has been carried out by the batch rolling system. That is to say, it has been a common practice to rough roll the rolling stocks one by one to make sheet bars, finish roll the sheet bars to steel strips, and take up the steel strips by coilers, respectively.
In order to moderate the impact load at an actual nip of the rolls for gripping the rough rolled sheet bar into the finish rolling mill, in the batch rolling system, it has l~een necessary to limit the traveling speed of the sheet bar at the actual nip. In addition, it has also been npcp~ ry to vary the rolling speed, for controlling the plate thickness and shape of the head and tail ends of the rolled product. In the finish rolling of thin sheets, in particular, the traveling speed of the steel strip has been controlled to or below a predetermined value until the leading end of the strip starts being wrapped around the mandrel of the coiler, so as to prevent the leading end portion f rom being lif ted while traveling . Thus, the batch rolling system has the drawback of varied rolling speeds and low rolling efficiency. In addition, the batch rolling system involves waste of time in, for example, peparatory operations between the rolling of a preceding rolling stock and the rolling of the following rolling stock, leading to low efficiency in using the equipment.
Furthermore, there has been the problem that the finish rolled product~ are liable to have poor shape at the head and tail ends thereof, resulting in a low production efficiency, and so on.
2 0 4 8 1 2 7 727,4-18 For solving these problems, ;nc~Ant hot rolling is adopted. In the incessant hot rolling, the steel strip obtained by continual rolling of joined slabs is cut up by a flying shear into lengths of strip corresponding to the initial slabs, followed by coiling by coilers. It is necessary in this case to change over the path of the steel strip 80 that the leading ends of the cut lengths of strip are guided to be taken up on the respective coiler drums. Techniques for such coiler drum alternation are disclosed in Japanese Patent rJn~yr~ne~l Publlcation(KoKAI) No. 61-014003 (1986) (Process for Down-Coiler Alternation in Tn~ sAnt ~Iot Rolling) and Japanese Patent rln~yAmln~d Publication (KOKAI) No. 61--119326 (1986) (Gate Device for RollingLine Alternation).
According to the Japanese Patent T~n~Y~m1n~d Pub-lication (KOKAI) No. 61-119326 (1986), a deflector disposed on the entry side of coiler rolls is moved up and down to achieve alternation of coilers. The up-down motion of tl~e deflector may flaw the steel strip. To avoid the formation of flaws, the deflector is provided with ;IllY; 1 ~A,ry rollers. Since the auxiliary rollers are to be arranged in a limited space, however, the rollers should be small in diameter and, due to the small roller ~ 2048 1 27 7~'15~
diameter, a slight deviation in the position of contact of the roller with the steel strip can render the strip guidillg direction unstable, making it impossible to coil the strip. In the technique according to the Japanese Patent Un~ m~n~d Publication (RORAI) No. 61-014003 (1986~, on the other hand, each coiler is provided with a main and an auxiliary set of pinch rolls, which are operated to achieve coiler arum alternation. This technique requires a complicated mechanism.
SUM~IARY QF TEIE INVENTION
It is attempted in this invention to enable higher-speed alternation of coiler drums for coiling of cut steel strips in incessant hot rolling, one b~ one, and to achieve higher productivity; ena~le an easy and assured change of direction so as to guide the leading end of a cut steel strip toward the next coiler to be used; and to enable changeover from a coiler on the downstream side to a coiler on the up-stream side.
This invention makes an implu~/~ L on the alternation of coiler drums ~or a traveling steel strip in incessant hot rolling, by adopting the follow-ing process. The process for coiler drum alternation in incessant hot rolling comprises the steps of oscil-lating upper and lower tiltable pinch rolls disposed on the exlt side of a shear, thereby changing the direction ~ 2~8~ ~7 of the steel strip so that a leading end formed upon cutting the strip is directed toward the coiler drum to be used next, and cutting the steel strip The present invention also provides an apparatus adapted to the process mentioned above. The apparatus comprises upper and lower pinch rolls for nipplng a steel strip therebetween on an entry side of a coller ln the apparatus, a frame for ;'r~ ting the pinch rolls, the frame being supported at a lower end thereof on a pin so that a line connecting the centers of the upper and lower pinch rolls can be tilted with respect to a traveling direction of the steel strip, and means for tilting the frame Oll the pin.
BRIEF DES( ~ I I''l' l ~)N OF TE~E DRAWIMGS
Figure 1 is an illustration of an alternation apparatus preferable for carrying out this invention;
Figure 2 is an illustration of an alternation process according to this invention, in the case of change-over :from a coiler on a downstream side to a coiler on an upstream slde;
Figure 3-_is an illustration of changeover from a coiler on an upstream side to a coiler on a downstream side;
Figure 4 is an illustration of an exemplary system according to the prior art; and Figure 5 is a general view of a hot rolling line .
DESCRIPTION OF PREFERRED E~IBODIMENTS OF TEIE INVENTION
Figure 5 illustrates the entire steps carried out in a hot rolling line. A steel slab 90 is rough rolled by hot roughing mills 50, to become a sheet bar 95. The sheet bar 95 is finish rolled by hot fin;~hing stands 60 into an elongate steel strip 100. In the conventional batch rolling system, the sheet bars 95 are finish rolled one by one, and the resultant steel strips are coiled by coilers 30 one by one ( each strip being coiled on one of coiler drums). After one steel strip is t,~ken up on one coiler drum, in the conventional batch rolling system, there is suf f icient time for such a pr~paratory operation as to enable the next steel stri]p to be coiled on another coiler drum.
In the i n~ss~nt hot rolling to which this invention is applied, a welder 70 for joining the sheet bars 95 is provided between the roughing mills 50 and the finishing stands 60, 80 as to joint the leading end 2048 1 2' of tlle succeeding sheet bar to the tail end of the preceding sheet bar. Therefore, the hot f;niflh;ng stands 60 performs continual rolling of a multiplicity of sheet bars 95 joined together. Since the joined body of sheet bars 95 finish rolled continually in this manner has discontinuity only at the foremost and backmost ends, it is possible to carry out high-speed fini~h rolling, without any complicated modification of rolling speed.
After the continual finish rolling, the steel stri]? 100 is cut at the joint portions thereof by a shear 80, and the cut lengths of strip are coiled separately by the coilers 30. For the cutting of the steel strip 100 during the highspeed rolling and for alternation of the coilers 30 in preparation for the next coiling operation, the path for the steel strip should be changed assuredly at high speed.
Figure 4 shows an apparatus according to the prior art, in which pinch rolls 40, 42 can be moved farther apart, and a deflector 44 capable of being moved up and down is provided on the entry side of coiler drums 30a, 30b so as to change the traveling direction of the steel strip 100. The deflector 44 is provided with auxiliary rollers 48 small in diameter. In this 2048 1 ~7 conventional apparatus, a slight deviation in the position of contact of the strip lO0 with the roller 48 can render the strip guiding direction unstable, making it ilrlpossible to coil the strip.
Figure 1 is an illustration of the apparatus for coiler drum alternation accordlng to this invention. In the L~rocess for coiler drum alternation in incessant hot rolling according to thi8 invention, rough-rolled sheet bars are jointed end to end at a position on the entry side of the finishing stands, the jointed sheet bars are conti.nually hot rolled in the fin;~hin~ stands, the resultant steel strip is cut up on the entry side of coilers, and the cut lengths of strip are successively coiled, in an alternating manner, on a plurality of coilers arranged in series.
In Figure 1, upper and lower pinch rolls 10 and 12 are placed in a housing 14. The housing 14 is 50 desiglned as to be tilted by a hydraulic cylinder 16. To coil a steel strip 100 by a coiler 30, the housing 14 is tilted by the hydraulic cylinder 16 80 that the center line 22 passing through the centers of the upper and lower pinch rolls 10, 12 is tilted as indicated by 22a, and a deflector 18 is directed to the side of the coiler 30, whereby the strip lO0 i5 coiled.
At the time of coiling by a coiler on the downstream side, the housing 14 is returned into the solid-line position in Figure 1, and the deflector 18 into the position for directing downstream.
The process for coiler drum alternation is illustrated in Figures 2 and 3. Figure 2 shows the changeover from a coiler 30b on the downstream side to a coiler 30a on the upstream side. To make a changeover from the coiling of the steel strip 100 by the downstream-side coiler 30b to that by the upstream-side coiler 30a, a housing 14 on the upstream side is tilted so that the center line passing through the centers of the upper and lower pinch rolls lOa, 12a is tilted, the upstream-side coiler 30a is set ready for coiling, and the 3teel strip 100 is cut by the shear 80. In this case, the upper and lower pinch rolls lOb, 12b of the downstream-side coiler 30b may be in the non-tilted condition. It is thereby poasible to maintain a tail end ]portion of the steel strip lOOb securely by the pinc]h rolls lOb, 12b until the coiling of the strip lOOb is finished, and to obtain a better coil form.
Figure 3 shows a changeover from the coiler 30a on t]he upstream aide to the coiler 30b on the downstream side .
_g _ To make a changeover f rom the coiling of a steel strip lOOa by the upstream-side coiler 30a to the coiling of a steel strip lOOb by the downstream-side coiler 30b, the housing 14b on the downstream side i8 tilted so that the center line pa6sing through the centers of the upper and lower pinch rolls lOb, 12b of the downstream-side coiler 14b is tilted, and the downstream-side coiler 30b is set ready for coiling. In this case, the center line passing through the centers of the upper and lower pinch rolls lOa, 12a of the upstream-side coiler 30a i8 kept untilted. The steel strip 100 is cut by the shear while the upper pinch roll lOa of the upstream-side coiler 30a is thus prevented from exerting a downward bending force on the succeeding portion of strip. Upon the cutting of the steel strip 100, the succeeding portion of strip is moved straight ahead to be caught by the pinch rolls lOb, 12b on the downstream side, and is wrapped around the downstream-side coiler 30b.
This invention produces the following excellent ef f ects:
(1) The need for a deflector with a complicated construction, as in the prior art, is eliminated.
-2048~ 27 .
(2) The tail end of the preceding steel strip can be clamped by the upper pinch roll.
( 3 ) The head end of the succeeding steel strip can be guided by the upper pinch roll.
(4) It is sufficient to provide the coiler on the upstream side with only one set of pinch rolls, as contrasted to two sets of pinch rolls required according to the prior art.
Claims (7)
1. A process for alternation of coiler drums for a traveling steel strip in incessant hot rolling, the process comprising the steps of oscillating upper and lower tiltable pinch rolls disposed on an exit side of a shear, thereby changing the direction of the steel strip so that a head end formed upon cutting the strip is directed toward the coiler drum to be used next, and cutting the steel strip.
2. The process as set forth in claim 1, wherein the oscillation of the upper and lower pinch rolls is carried out by use of a hydraulic cylinder.
3. The process as set forth in claim 1, further comprising the step of moving up and down a deflector disposed on an exit side of the pinch rolls, according to the oscillation of the pinch rolls.
4. Apparatus for incessant hot rolling which comprises upper and lower pinch rolls for nipping a steel strip therebetween on an entry side of a coiler in the apparatus, a frame for accommodating the pinch rolls, the frame being supported at a lower end thereof on a pin so that a line connecting the centers of the upper and lower pinch rolls can be tilted with respect to a traveling direction of the steel strip, and means for tilting the frame on the pin.
5. The process as set forth in claim 1, 2 or 3, wherein the oscillation of the upper and lower tiltable pinch rolls involves (i) tilting a housing in which the upper and lower tilt-able pinch rolls are secured such that a line passing through the centers of the upper and lower pinch rolls is tilted with respect to the direction of the steel sheet coming into the housing and (ii) returning the housing to its untilted position.
6. The process as set forth in claim 5, wherein the housing is supported at a lower end thereof by a pin so that the housing may be tilted on the pin.
7. A process as set forth in claim 5, wherein the steel strip has been subjected to the following prior steps:
rough rolling of steel slabs by hot rolling mills into sheet bars;
joining a leading end of a succeeding one of the sheet bars to a tail end of a preceding one of the sheet bars by a welder to form a continual sheet;
continuous hot finishing roll of the continual sheet by hot finishing strands, and cooling the hot finished continual sheet.
rough rolling of steel slabs by hot rolling mills into sheet bars;
joining a leading end of a succeeding one of the sheet bars to a tail end of a preceding one of the sheet bars by a welder to form a continual sheet;
continuous hot finishing roll of the continual sheet by hot finishing strands, and cooling the hot finished continual sheet.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2201309A JPH0489135A (en) | 1990-07-31 | 1990-07-31 | Method for changing over coiler of endless hot rolling |
| JP2-201309 | 1990-07-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2048127A1 CA2048127A1 (en) | 1992-02-01 |
| CA2048127C true CA2048127C (en) | 1997-01-21 |
Family
ID=16438871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002048127A Expired - Fee Related CA2048127C (en) | 1990-07-31 | 1991-07-30 | Process for coiler drum alternation in incessant hot rolling and apparatus therefor |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0469483A3 (en) |
| JP (1) | JPH0489135A (en) |
| KR (1) | KR950001807B1 (en) |
| CN (1) | CN1034400C (en) |
| CA (1) | CA2048127C (en) |
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| DE19620696A1 (en) * | 1996-02-14 | 1997-08-21 | Schloemann Siemag Ag | Coiler line for strips |
| EP0790084B1 (en) * | 1996-02-14 | 2001-12-19 | SMS Demag AG | Winding device for bands |
| DE10208964A1 (en) * | 2002-02-28 | 2003-09-18 | Sms Demag Ag | Deflection device for a belt in a reel system |
| DE10258499A1 (en) * | 2002-12-14 | 2004-07-01 | Sms Demag Ag | Deflection device of a reel system for reeling tapes |
| DE102006029858A1 (en) * | 2006-06-28 | 2008-01-03 | Sms Demag Ag | Method and device for winding a metallic strip |
| WO2008116666A1 (en) | 2007-03-28 | 2008-10-02 | Sms Siemag Ag | Method and device for winding hot-rolled strip |
| CN102513409A (en) * | 2011-12-24 | 2012-06-27 | 中国重型机械研究院有限公司 | Rapid strip valve system of tandem cold mill set |
| CN105059998A (en) * | 2015-08-12 | 2015-11-18 | 安徽江威精密制造有限公司 | Angle conversion device |
| CN107282693A (en) * | 2017-06-29 | 2017-10-24 | 广东含元工业技术有限公司 | A kind of hydraulic drum structure of sheet metal strip |
| KR102020442B1 (en) * | 2017-08-18 | 2019-09-10 | 주식회사 포스코 | Apparatus for coiling |
| CN112893515B (en) * | 2021-03-03 | 2022-08-09 | 烟台孚信达双金属股份有限公司 | Laminated winding machine for bar mosquito-repellent incense discs |
| CN114589214B (en) * | 2022-02-28 | 2024-10-01 | 首钢京唐钢铁联合有限责任公司 | Method and device for processing winding roll of lower pinch roll |
| CN115106398B (en) * | 2022-07-28 | 2023-10-27 | 射洪县才伦建材有限责任公司 | Split-type spiral coil winding processing equipment for steel bar production |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT218993B (en) * | 1959-11-27 | 1962-01-10 | Siemens Ag | Digital path-dependent control device |
| GB2163689A (en) * | 1984-08-31 | 1986-03-05 | Davy Mckee | Hot rolling metal strip |
| JPH01250246A (en) * | 1987-09-21 | 1989-10-05 | Nippon Petrochem Co Ltd | medical tray |
| JP2003265584A (en) * | 2002-03-15 | 2003-09-24 | Yamato Sanki:Kk | Circulation system of sterilization work of medical equipment material between medical facility and undertaker |
| JP3947686B2 (en) * | 2002-06-11 | 2007-07-25 | オリンパス株式会社 | Medical device reuse management system and computer-based medical device reuse management method |
| JP4338464B2 (en) * | 2003-07-11 | 2009-10-07 | Ｈｏｙａ株式会社 | Endoscope cleaning tool |
| US7918896B2 (en) * | 2004-09-15 | 2011-04-05 | Wright Medical Technology, Inc. | Unitary acetabular cup prosthesis with extension for deficient acetabulum |
| AU2007297546B9 (en) * | 2006-09-21 | 2013-06-20 | Spinecore, Inc. | Intervertebral disc implants and tooling |
| US8740912B2 (en) * | 2008-02-27 | 2014-06-03 | Ilion Medical Llc | Tools for performing less invasive orthopedic joint procedures |
| JP5457458B2 (en) * | 2008-10-21 | 2014-04-02 | メディカート インターナショナル リミテッド | Kit for storage and transfer of medical instruments |
-
1990
- 1990-07-31 JP JP2201309A patent/JPH0489135A/en active Pending
-
1991
- 1991-07-26 EP EP19910112604 patent/EP0469483A3/en not_active Withdrawn
- 1991-07-30 CA CA002048127A patent/CA2048127C/en not_active Expired - Fee Related
- 1991-07-31 KR KR1019910013156A patent/KR950001807B1/en not_active Expired - Fee Related
- 1991-07-31 CN CN91105632A patent/CN1034400C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2048127A1 (en) | 1992-02-01 |
| CN1060798A (en) | 1992-05-06 |
| KR920002243A (en) | 1992-02-28 |
| EP0469483A3 (en) | 1992-04-08 |
| JPH0489135A (en) | 1992-03-23 |
| EP0469483A2 (en) | 1992-02-05 |
| CN1034400C (en) | 1997-04-02 |
| KR950001807B1 (en) | 1995-03-03 |
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Legal Events
| Date | Code | Title | Description |
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| EEER | Examination request | ||
| MKLA | Lapsed |