CN1236873C - Tension-reduced rolling mill and its operation method - Google Patents
Tension-reduced rolling mill and its operation method Download PDFInfo
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- CN1236873C CN1236873C CNB02152811XA CN02152811A CN1236873C CN 1236873 C CN1236873 C CN 1236873C CN B02152811X A CNB02152811X A CN B02152811XA CN 02152811 A CN02152811 A CN 02152811A CN 1236873 C CN1236873 C CN 1236873C
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- 238000005096 rolling process Methods 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 238000003801 milling Methods 0.000 claims description 30
- 239000002131 composite material Substances 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000002045 lasting effect Effects 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 230000001133 acceleration Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B35/02—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills
- B21B35/025—Drives for metal-rolling mills, e.g. hydraulic drives for continuously-operating mills for stretch-reducing of tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
- B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/78—Control of tube 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
- B21B15/0007—Cutting or shearing the product
- B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/18—Presence of product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2273/00—Path parameters
- B21B2273/20—Track of product
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/04—Roll speed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/06—Product speed
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
- Disintegrating Or Milling (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Method of operating a stretch-reducing mill for rolling pipe of finite length, containing, at least, two rolling mills, which are located after each other in the direction of the feed of pipe, moreover in each rolling mill, at least, two interacting rolls are located, each of which on the specific peripheral section of pipe fits closely to it and rolls it, and in this case there is, at least, two drives for the rolls of two different rolling mills. For improvement of quality of further processes method includes the following stages: a) determining a time of point, at which the rear end of the pipe in the direction of feed leaves the last output rolling stand; b) setting of a time interval of prescribed duration, in which time point lies, when the rear end of pipe in the direction of feed leaves the output rolling stand; c) controlling or regulating a drive of output rolling stand in such a manner that during the time interval the drive of the rolls of output rolling stand occurs at reduced frequency of rotation, and the coming out of the pipe with respect to this, generally at constant velocity.
Description
Technical field
The present invention relates to be used for the operation method of the stretch reducing milling train of the limited pipe of mill length, described stretch reducing milling train has at least two rolling machine frames that front and back are provided with on the pipe throughput direction, the roll of at least two cooperatings wherein is set in each rolling machine frame, these rolls are close to respectively on one section local outer peripheral face of limited pipe and to pipe and are rolled, be provided with at least two drive units that are used to drive the roll of two different rolling machine frames here.In addition, the present invention relates to implement the device of this method.
Background technology
In the stretch reducing milling train, the pipe that process is listed as through a roll mill, and in these roll mill row, on the pipe throughput direction, front and back are provided with a plurality of rolling machine frames.Be supported with roll in each frame, they contact the limited local outer peripheral face of pipe respectively in the operation of rolling.In addition, total total a plurality of and be three rolls at least in each rolling machine frame, the whole outer peripheral face of pipe is surrounded by these rolls basically.Therefore, pipe is reduced to littler diameter.
Milling train has one or more groups rolling machine frame mostly, and the roll of each frame is driven by a common drive unit.This drive unit comprises two motors (basic driver device and stack drive unit), and it rotates so addition in a composite teeth roller box, has promptly obtained desirable mill speed in the rolling machine frame that front and back are provided with and has improved.
Behind milling train, a sawing machine often is set, with this sawing machine rolling pipe scale.Here, sawing machine is designed to the form of " flying saw " mostly, this means that with the same moved further of the transporting velocity of pipe, promptly sawing process can carry out in the process of Delivery tube in sawing process for it.In addition, be provided with operate machine (manipulator) behind milling train, they have for example played the effect (on cold bed) of pusher.For all manufacturing procedures (sawing pushes away steel etc.) of carrying out after rolling, uniformity is favourable to make pipe move as much as possible, perhaps must be so, so that reach required machining accuracy.
Relevant therewith, " throw steel effect " of so-called stretch reducing milling train is proved to be problematic: when the final frame of milling train is not on the last shelf position at milling train, under the situation that the grouping stack drives, rotating speed in the finish to gauge frame is too high, thereby rolled piece is that the pipe of limited length obtains of short duration acceleration when leaving last frame.This has obviously disturbed the following process process, for example sawing, thereby can't reappear ground or carry out sawing according to required quality ground, alternation effect, especially velocity conditions in rearmounted frame and friction condition between the rolling machine frame that the parameter of influence throwing steel especially changes and dynamic rotation speed change.Pipe speed can reach 30% because of throwing the relatively stable constant muzzle velocity raising of steel effect.When adopting the pipe end control device, the steel effect may occur throwing and strengthen.
Summary of the invention
Therefore, task of the present invention is, the stretch reducing milling method and the corresponding device of the described type of beginning is provided, and by this method this device maybe, can dwindle or eliminates the defective that exists fully.
According to the present invention, so finish this task, promptly the method for the above-mentioned type may further comprise the steps:
A) be determined at the moment that pipe end after leaning on the throughput direction leaves rolling machine frame last on throughput direction;
B) determine the time interval that the moment that described pipe end after leaning on the throughput direction leaves rolling machine frame last on throughput direction is residing, predetermined lasting time is arranged;
C) so control or regulate the drive unit of last frame, promptly during this time interval in, rolled piece leaves with constant substantially speed.
Utilize effective muzzle velocity control device set forth above or adjusting device, can prevent so-called throwing steel effect, the result can obtain high-quality in subsequent handling, has especially improved the pipeline section tolerance when sawing.Method set forth above to consider to throw the steel effect during reduce or cancelled the basic driver device of rearmounted frame group and the motor speed of stack drive unit in (allowing in other words the boost phase that the people worries in), thus one, guaranteed that pipe leaves milling train with constant speed.
An improvement project regulation, according to the pipe rear end through one in the observation or the monitoring result in the moment of the position before this outlet side frame on the throughput direction and considered from the monitoring location pipe mill speed of rolling machine frame to the end, obtain the moment that pipe end after leaning on the throughput direction leaves outlet side rolling machine frame or frame group.
Under the situation of long tube, except controlling or adjusting the drive unit of oral-lateral rolling machine frame, also attach troops to a unit in the control or the adjustment of the drive unit of rolling machine frame forward on throughput direction, this may be significant, and wherein the roll of preposition rolling machine frame has touched pipe in this time interval.
At last, can a tolerance be set, should not depart from and promptly surpass this tolerance for the rotating speed of controlling or adjust the oral-lateral rolling machine frame.
The stretch reducing milling train of the present invention of implementing this method has at least two rolling machine frames that have roll, wherein is provided with at least two drive units that are used to drive the roll of two different rolling machine frames.The present invention has stipulated, be provided with the pipe end that is determined at after leaning on the throughput direction and leave the device in the moment of rolling machine frame last on throughput direction and the device of so controlling or adjust the oral-lateral rolling machine frame, promptly at preset time in interim, the driving of outlet side rolling machine frame roll is carried out with the rotating speed that reduces.
According to improvement project, on throughput direction, be positioned at sensor is set before the outlet side rolling machine frame, it is applicable to grasps pipe end through constantly.In addition, this sensor can send measuring-signal to control device that acts on the outlet side rolling machine frame or adjusting device.
At least the drive unit that is positioned at last rolling machine frame on throughput direction of the stretch reducing milling train form of drive unit that can be designed to always to superpose, it has a composite teeth roller box and two motors.At least three rolling machine frames can drive by driving the drive unit that is positioned at last rolling machine frame on throughput direction.
Be preferably in a sawing machine is set with being positioned at outlet side rolling machine frame back on the throughput direction, it can have one and fly saw.In addition,, be equipped with a manipulator tool for last rolling machine frame here.
Description of drawings
One embodiment of the present of invention shown in the drawings, wherein:
Fig. 1 is the right schematic diagram of seeing on the pipe throughput direction of roll;
Fig. 2 is the side view that belongs to Fig. 1;
Fig. 3 schematically represents the structure of stretch reducing milling train;
Fig. 4 represents to have Fig. 3 part that is positioned at last rolling machine frame on throughput direction;
Fig. 5 expresses the rotating speed process over time of the roll of oral-lateral rolling machine frame.
The specific embodiment
In Fig. 1,2, schematically show two rolls to 4,5,6 or 4 ', 5 ', 6 ' how in the stretch reducing milling train rolling pipe 2. Roll 4,5,6 belongs to the first rolling machine frame 3a, and roll 4 ', 5 ', 6 ' belong to the second rolling machine frame 3b.These two rolling machine frame 3a, 3b belong to the first frame group of stretch reducing milling train again, as following also want as described in.For the pipe 2 that makes a limited length is subjected to rollingly uniformly through the stretch reducing milling train time on its whole outer peripheral face, the roll of rolling machine frame 3a, the 3b that is provided with before and after two rotates 60 ° relative to the tubular axis line respectively, as Fig. 1,2 know illustrate.
In Fig. 3, schematically show the structure of stretch reducing milling train 1.On the throughput direction R of pipe 2, front and back are provided with a plurality of rolling machine frames 3.In each rolling machine frame, shown in Fig. 1,2 signals, be provided with roll.By rolling, in each rolling machine frame 3, dwindled the diameter of pipe 2, wherein between some rolling machine frames 3, keep the tension force of stretching pipe 2.Because roller diameter successively decreases by frame, so always commentaries on classics is fast more more for the roll of back.
For five groups of rolling machine frames 3,3 of drafting ', 3 ", 3 , 3 " " be provided with drive unit 7,7 ', 7 ", 7 , 7 " ".These drive units 7,7 ', 7 ", 7 , 7 " " form of the drive unit that is designed to superpose, they have respectively two motors 13,13 ', 13 ", 13 , 13 " " and 14,14 ', 14 ", 14 , 14 " ". Motor 13,14 drive composite teeth roller boxs 12,12 ', 12 ", 12 , 12 " ", in the composite teeth roller box, the rotating speed addition of motor 13,14.Coordinative role in the composite teeth roller box 12 is used to make rotating speed to pursue the raising of frame ground.
Behind milling train 1, be provided with a sawing machine 15, by this sawing machine with rolling pipe 2 scales.Sawing machine is designed to fly the saw form, promptly saws in sawing process to be synchronized with the movement with the speed of dishing out of pipe at throughput direction R, so that produce neat pipeline section.
As described above, frame group 3,3 ', 3 ", 3 , 3 " " in mode has obtained rotating ratio between frame according to the rules because stack drives.If being frame 3c " " and 3d " ", the final frame of milling train 1 do not have on the last shelf position of milling train 1, rotating speed in then final frame 3c " " and the 3d " " is because of there being grouping stack drive unit 7 " " too high, thereby pipe 2 obtains of short duration acceleration when leaving last shelf position.This throwing steel effect has obviously been disturbed subsequent handling, is the sawing operation in the present embodiment.
In order to dwindle or to eliminate and throw the steel effect, take following measure:
At last frame group 3a " ", 3b " ", 3c " " and 3d " " before, a sensor 10 is set on a monitoring location 9.Especially as shown in Figure 4, when sensor 10 measures pipe 2 rear ends 8 through position 9.The signal of being measured by sensor 10 is passed to a control dress system or adjusting device 11.Composite teeth roller box 12 " " (or motor 13 " " or 14 " ") provides roll to drive tachometer value for this control device or adjusting device 11.Therefore, in this control device or adjusting device 11, calculate the moment tA that pipe 2 is dished out by milling train 1 simply, promptly when pipe end 8 leaves final rolling machine frame 3d " ".
Giving predetermined one of this control device or adjusting device is time interval Δ T thus defined as illustrated in fig. 5, promptly calculates constantly tA near the terminal point of time interval Δ T.Now, this control device or adjusting device are taked adjusting or the control to the rotating speed of the roll of especially final rolling machine frame 3d " " in during time interval Δ T clearly, thereby make the pipe muzzle velocity not exceed a predetermined tolerance range Δ V.
In Fig. 5, be shown in broken lines the curve that does not adopt such measure and obtain.Speed v is being thrown pipe t constantly
ABefore improve always, this has obviously disturbed follow-up sawing operation.By said method, guaranteed not exceed the tolerance range Δ V of the speed v shown in the slip.Thereby, can accurately carry out the sawing operation.
Thus one, the speed when effectively having prevented to throw pipe improves, here, simultaneously between some rolling machine frame 3a " ", 3b " ", 3c " " and 3d " " maintenance to the stretching of pipe.
Except the control of the drive unit 7 " " of outlet side rolling machine frame 3d " " and regulating, also drive unit more forward on throughput direction is regulated or controlled as 7 , as long as the roll of corresponding rolling machine frame has touched pipe 2.Thus one, avoided unfavorable pipe internal stress.But, just much of that as long as influence last rolling machine frame group 3a " ", 3b " ", 3c " " and 3d " " usually.
Give control device or the length of adjusting device predetermined time interval Δ T and the size of tolerance range Δ V, wherein rule of thumb calculate these values for practical application.These values can be displayed on the visual PC of milling train.Can be at any time by correspondingly input control device or adjusting device are carried out the data adjustment.Perhaps, also can obtain best data by the interpolation method of the given value that is used for existing stretch reducing milling train.
Particularly advantageous is that said method at least in the end carries out in three rolling machine frames.In this embodiment, carry out control or adjusting to last four rolling machine frame 3a " ", 3b " ", 3c " " and 3d " ".
The Reference numeral list
The 1-Tension-reduced rolling mill; The 2-pipe; The 3-rolling machine frame; 3a, 3b, 3c, first group of 3d-is rolling Frame; 3a ', 3b ', 3c ', 3d '-second group rolling machine frame; 3a ", 3b ", 3c " and, 3d " The 3rd group of rolling machine frame; 3a , 3b , 3c , four groups of rolling machine frames of 3d -Di; 3a " ", 3b " ", 3c " ", 3d " "-the 5th group rolling machine frame; 4,4 ', 5,5 ', 6,6 '-roll; 7,7 ', 7 ", 7 , 7 " " drive unit (stack drive unit); 8-pipe rear end; 9-sensing station (observation place); The 10-sensor; The 11-control device/ Adjusting device; 12,12 ', 12 ", 12 , 12 " " composite teeth roller box; 13,13 ', 13 ", 13 , 13 " " motor; 14,14 ', 14 ", 14 , 14 " " Motor; The 15-sawing machine; The L-tube length; The R-throughput direction; The t-time; tA-throw pipe constantly; The Δ T-time interval; V-pipe muzzle velocity; The tolerance of Δ V-pipe muzzle velocity;
Claims (18)
1, the operation method of the stretch reducing milling train (1) of the pipe that mill length (L) is limited, this stretch reducing milling train have at least two throughput directions in pipe (2) (R) and go up rolling machine frame (3a, 3b, the 3c that front and back are provided with, 3d, 3a ', 3b ', 3c ', 3d ' ...), wherein at each rolling machine frame (3a, 3b, 3c, 3d, 3a ', 3b ', 3c ', 3d ' ...) in be provided with the roll (4 of at least two cooperatings, 5,6,4 ', 5 ', 6 '), these rolls are close to one section limited local outer peripheral face of pipe (2) respectively and are rolled, be provided with at least two and be used to drive two different rolling machine frames (3a, 3b, 3c, 3d, 3a ', 3b ', 3c ', 3d ' ...) roll (4,5,6,4 ', 5 ', 6 ') drive unit (7,7 ', 7 "; 7 ; 7 " ") is characterized in that
A) be determined at pipe (2) end (8) after leaning on the throughput direction (R) leave at throughput direction (R) go up last outlet side rolling machine frame (3d " ") the moment (t
A);
B) determine that described pipe (2) end (8) after leaning on the throughput direction (R) leaves outlet side rolling machine frame (3d " ") the moment (t
A) residing, the time interval (Δ T) that predetermined lasting time arranged;
C) so control or adjust oral-lateral rolling machine frame (3d " ") drive unit (7 " "), in promptly during the time interval (Δ T), the driving of roll outlet side rolling machine frame (3d " ") is carried out with the rotating speed that reduces, and in during this pipe leaves, this roll drives and correspondingly carries out with constant substantially speed.
2, the method for claim 1, it is characterized in that, according to pipe (2) rear end (8) is gone up at outlet side rolling machine frame (3d " " at throughput direction (R) through one) monitoring result in moment of preceding position and considered from monitoring location (9) to outlet side rolling machine frame (3d " ") pipe (2) mill speed, obtain described pipe (2) after leaning on the throughput direction (R) and hold (8) to leave outlet side rolling machine frame (3d " " on throughput direction (R)) the moment (t
A).
3, method as claimed in claim 1 or 2, it is characterized in that, except control or adjust oral-lateral rolling machine frame (3d " ") drive unit (7 " "), also to attaching troops to a unit in forward rolling machine frame (3a , 3b , 3c , d ) drive unit (7 ) is regulated or is controlled, and the roll of described forward rolling machine frame has touched pipe (2) in this time interval (Δ T).
4, method as claimed in claim 1 or 2 is characterized in that, in order to control or adjust oral-lateral rolling machine frame (3d " ") drive unit (7 " ") rotating speed, stipulate a tolerance (Δ V), should not exceed this tolerance.
5, method as claimed in claim 3 is characterized in that, in order to control or adjust oral-lateral rolling machine frame (3d " ") drive unit (7 " ") rotating speed, stipulate a tolerance (Δ V), should not exceed this tolerance.
6, be used to implement method according to claim 1 and stretch reducing milling train (1) that be used for the limited pipe (2) of mill length (L), this stretch reducing milling train has at least two throughput directions in pipe (2) (R) and goes up rolling machine frame (3a, the 3b that front and back are provided with, 3c, 3d, 3a ', 3b ', 3c ', 3d ' ...), wherein at each rolling machine frame (3a, 3b, 3c, 3d, 3a ', 3b ', 3c ', 3d ' ...) in be provided with the roll (4,5 of at least two cooperatings, 6,4 ', 5 ', 6 '), these rolls are close to the local outer peripheral face of one section limited pipe (2) respectively and are rolled, and wherein are provided with at least two and are used to drive two different rolling machine frame (3a, 3b, 3c, 3d, 3a ', 3b ', 3c ', 3d ' ...) roll (4,5,6,4 ', 5 ', 6 ') drive unit (7,7 ', 7 "; 7 ; 7 " ") is characterized in that, is provided with pipe (2) end (8) that is determined at after leaning on the throughput direction (R) and leaves outlet side rolling machine frame (3d " ") the moment (t
A) device (10,11) and so control or adjust oral-lateral rolling machine frame (3d " ") device (11), the driving of roll promptly in a preset time is at interval during (Δ T), outlet side rolling machine frame (3d " ") is carried out to stablize constant rotating speed basically.
7, stretch-reducing mill as claimed in claim 6 is characterized in that, at outlet side rolling machine frame (3d " ") the front be provided with a sensor (10), it is applicable to the moment of measuring pipe (2) end (8) process.
8, stretch-reducing mill as claimed in claim 7 is characterized in that, this sensor (10) passes to one to measuring-signal and acts on outlet side rolling machine frame (3d " ") drive unit (7 " ") control device or adjusting device (11).
9, as the described stretch-reducing mill of one of claim 6 to 8, it is characterized in that, at least this stretch reducing milling train (1) is positioned at last rolling machine frame (3a " " on throughput direction (R), 3b " ", 3c " ", 3d " ") be a total stack drive unit drive unit (7 " "), it has a composite teeth roller box (12 " ") and two motors (13 " ", 14 " ").
10, stretch-reducing mill as claimed in claim 9 is characterized in that, at least three rolling machine frames (3a " ", 3b " ", 3c " ", 3d " ") by described drive unit (7 " ") drive.
11, as the described stretch-reducing mill of one of claim 6 to 8, it is characterized in that, at outlet side rolling machine frame (3d " ") the back be provided with a sawing machine (15).
12, stretch-reducing mill as claimed in claim 9 is characterized in that, at outlet side rolling machine frame (3d " ") the back be provided with a sawing machine (15).
13, stretch-reducing mill as claimed in claim 10 is characterized in that, at outlet side rolling machine frame (3d " ") the back be provided with a sawing machine (15).
14, as the described stretch-reducing mill of one of claim 6 to 8, it is characterized in that, at outlet side rolling machine frame (3d " ") the back be provided with one and operate machine automatically.
15, stretch-reducing mill as claimed in claim 9 is characterized in that, at outlet side rolling machine frame (3d " ") the back be provided with one and operate machine automatically.
16, stretch-reducing mill as claimed in claim 10 is characterized in that, at outlet side rolling machine frame (3d " ") the back be provided with one and operate machine automatically.
17, stretch-reducing mill as claimed in claim 11 is characterized in that, at outlet side rolling machine frame (3d " ") the back be provided with one and operate machine automatically.
18, as claim 12 or 13 described stretch-reducing mills, it is characterized in that, at outlet side rolling machine frame (3d " ") the back be provided with one and operate machine automatically.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE10157742A DE10157742C1 (en) | 2001-11-24 | 2001-11-24 | Method of operating a stretch-reducing mill and stretch-reducing mill |
| DE10157742.7 | 2001-11-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1422709A CN1422709A (en) | 2003-06-11 |
| CN1236873C true CN1236873C (en) | 2006-01-18 |
Family
ID=7706885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB02152811XA Expired - Fee Related CN1236873C (en) | 2001-11-24 | 2002-11-25 | Tension-reduced rolling mill and its operation method |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP1314491B1 (en) |
| CN (1) | CN1236873C (en) |
| AT (1) | ATE284279T1 (en) |
| DE (2) | DE10157742C1 (en) |
| ES (1) | ES2234970T3 (en) |
| RU (1) | RU2300433C2 (en) |
| UA (1) | UA72613C2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103406371B (en) * | 2013-07-04 | 2015-11-25 | 中国重型机械研究院股份公司 | A kind of cold pilger mill pipe seam detecting and controlling system and method |
| CN103447300B (en) * | 2013-08-30 | 2015-08-05 | 湖北新冶钢特种钢管有限公司 | Central driving reducing mill and reducing mill are to the reducing process of hot rolled seamless steel tube |
| CN103801558B (en) * | 2014-01-27 | 2015-12-30 | 胜利油田康贝石油工程装备有限公司 | Oil the ladder type seam processing method of slot pipe and equipment |
| DE102017220750A1 (en) * | 2017-11-21 | 2019-05-23 | Sms Group Gmbh | Device for controlling a draft-reducing mill |
| DE102018207908A1 (en) * | 2018-05-18 | 2019-11-21 | Sms Group Gmbh | Stretch reduction mill with improved diameter and wall thickness tolerance |
| CN109047335A (en) * | 2018-06-11 | 2018-12-21 | 黑龙江建龙化工有限公司 | Steel pipe sizes outer diameter control method |
| DE102018217378B3 (en) * | 2018-10-11 | 2020-03-26 | Sms Group Gmbh | Wall thickness control when reducing pipe stretch |
| CN109877160B (en) * | 2019-04-09 | 2020-03-31 | 浙江鼎尚不锈钢有限公司 | Four-roller reducing mill for high-precision seamless steel pipe |
| CN112872044B (en) * | 2021-01-13 | 2023-02-17 | 首钢京唐钢铁联合有限责任公司 | Method and device for controlling rolling rhythm |
| CN114515762B (en) * | 2022-01-28 | 2024-01-26 | 广西钢铁集团有限公司 | Method for controlling tail size of high-speed wire rod round steel |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3601693A1 (en) * | 1986-01-17 | 1987-07-23 | Mannesmann Ag | ROLLING MILL FOR TUBE REDUCTION |
| DE4446659C1 (en) * | 1994-12-16 | 1996-07-25 | Mannesmann Ag | Working method for producing pipe in drawing roller |
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2001
- 2001-11-24 DE DE10157742A patent/DE10157742C1/en not_active Expired - Fee Related
-
2002
- 2002-10-09 EP EP02022590A patent/EP1314491B1/en not_active Expired - Lifetime
- 2002-10-09 ES ES02022590T patent/ES2234970T3/en not_active Expired - Lifetime
- 2002-10-09 AT AT02022590T patent/ATE284279T1/en active
- 2002-10-09 DE DE2002501715 patent/DE50201715D1/en not_active Expired - Lifetime
- 2002-11-22 RU RU2002131461/02A patent/RU2300433C2/en not_active IP Right Cessation
- 2002-11-22 UA UA2002119336A patent/UA72613C2/en unknown
- 2002-11-25 CN CNB02152811XA patent/CN1236873C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ATE284279T1 (en) | 2004-12-15 |
| DE10157742C1 (en) | 2003-06-18 |
| ES2234970T3 (en) | 2005-07-01 |
| RU2300433C2 (en) | 2007-06-10 |
| UA72613C2 (en) | 2005-03-15 |
| EP1314491B1 (en) | 2004-12-08 |
| DE50201715D1 (en) | 2005-01-13 |
| EP1314491A1 (en) | 2003-05-28 |
| CN1422709A (en) | 2003-06-11 |
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Granted publication date: 20060118 Termination date: 20191125 |