US3151508A - Apparatus for controlling a continuous rolling mill to maintain constant gage in theleading and trailing ends of strip lengths - Google Patents

Apparatus for controlling a continuous rolling mill to maintain constant gage in theleading and trailing ends of strip lengths Download PDF

Info

Publication number
US3151508A
US3151508A US517504A US51750455A US3151508A US 3151508 A US3151508 A US 3151508A US 517504 A US517504 A US 517504A US 51750455 A US51750455 A US 51750455A US 3151508 A US3151508 A US 3151508A
Authority
US
United States
Prior art keywords
strip
stand
motor
speed
breakdown
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 - Lifetime
Application number
US517504A
Other languages
English (en)
Inventor
Robert W Holman
James E Mcnamara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
United States Steel Corp
Original Assignee
United States Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to NL104993D priority Critical patent/NL104993C/xx
Priority to BE548912D priority patent/BE548912A/xx
Priority to LU34447D priority patent/LU34447A1/xx
Priority to US517504A priority patent/US3151508A/en
Application filed by United States Steel Corp filed Critical United States Steel Corp
Priority to GB18173/56A priority patent/GB813130A/en
Priority to FR1154539D priority patent/FR1154539A/fr
Priority to DEU3986A priority patent/DE1116308B/de
Priority to US26587A priority patent/US3029373A/en
Application granted granted Critical
Publication of US3151508A publication Critical patent/US3151508A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H02P5/50—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another by comparing electrical values representing the speeds
    • 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
    • B21B37/46—Roll speed or drive motor control

Definitions

  • This invention relates to the cont nuous hot-rolling of metal and, more particularly, to the con rol of the several stands of a rolling mill in order to maintain a constant gage in the leading and trailing ends of strip length Specifi ally the invention relates to a control system for the motors of a continuous mill for rolling breakdowns into strip, whereby the ed of the second and each subsequent mill stand of the finishing train is reduced temporarily as the leading end or" a breakdown approaches it and again as the trailing end of the breakdown leaves the preceding stand.
  • the effect of such control is to reduce the abnormally heavy tension to which the leading end is subjected on entering successive stands, thereby preventing an excessive reduction of the leading. end as a result or" the added tension otherwise existing.
  • a further effect is to prevent an increase in thickness at the trailing end of the breakdown as a result of the loss of tension which would otherwise occur, by increasing the tension on that portion thereor between the second and third stands, after the trailing end leaves the first stand, and so on.
  • This invention relates to means for eliminating the chan s of thickness of the finished strip resulting from vary ng tension.
  • the motors driving the finishing stands of a hot-strip mill are usually designed with drooping speed characteristics, i.e., the motor speed will decrease with increasing load, to the extent of two percent or more, from no load to full load.
  • the finishin train is thus stable and easily controlled since the overall system tends to be self-regulating. if, at any instant, the mill stand speeds are not exactly proportional relative to the desired percentages of strip reduction at each stand, the stand which is running too fast will increase tension at the input side and relax tension at the output side, thus increasing its motor load which will cause the speed to decrease, thereby tending to correct the unbalanced tension conditions.
  • Patented Get. 6, 1964 ice Usually the operator will adjust each motor to operate on no-load at a speed slightly higher than anticipated rolling speed so that under normal rolling conditions, a motor will not cause the strip to form a loop on the entry side of a mill. trip tension will be established when the strip is in the mill, furthermore, after motor speeds have decreased in accordance with their speed characteristics described above. As the breakdown enters each stand, however, the motor is initially running faster than its full-load speed.
  • the th ckness of the finished strip will start to increase as soon as the trailing end leaves the first stand and will increase progressively as the trailing end leaves each stand.
  • the amount of increase in thickness depends on the amount of tension previously established.
  • This invention relates to a system of control to alleviate these efiects of tension on finished thickness.
  • the control will operate in such a manner as to decrease temporarily the speed of the main drive motors of the second through the fifth stands as the breakdown enters each immediately preceding stand and again as the breakdown leaves the preced ing stand. 7
  • FIGURE 1 is a diagrammatic showing of the first two stands in the finishing train of a continuous hot-strip mill, the motors driving them and some of the auxiliary control devices;
  • FIGURE 2 is a circuit diagram showing the speed control means provided for each of the motors of the second and succeeding stands.
  • FIGURE 3 is a schematic circuit showing the control relays for bringing the control means of FIGURE 2 into operation at the proper times.
  • mill stands 1 and 2 are driven by motors 3 and 4 respectively. These stands are the first two of, for example, a six-stand finishing train following a roughing train of four stands (not shown).
  • a tachometer generator 5 is driven by motor 4.
  • the speeds of motors 3 and 4 are manually controlled by motordriven main field rheostats 6 and Vernier rheostatsida, only 'those for motor 4 being shown in FIGURE 1.
  • Supplemental control of the excitation of .motor 4 is effected by a regulator 7.
  • the motor 4 normally operates at a speed somewhat greater than that of motor 3 because of the elongation of the breakdown 8 effected in stand 1, and the need to maintain the portion thereof between the stands under tension to aid the reduction.
  • This tension is abnormally high when the leading end of the breakdown enters stand 2 running at no-load speed. The tension on this trailing end is relieved, however, the instant it leaves the stand 1, so far as the portion of the breakdown between stands 1 and 2 is concerned.
  • Motor-field regulator 7 is controlled by a speed-follower potentiometer 10 and tachometer generator 5.
  • a speed-follower regulator 9 controls a motor 11 which drives potentiometer 10.
  • Regulators 7 and 9 are Arnplidyne generators driven by a motor 12.
  • the circuits of the various control devices, as shown in detail in FIGURE 2, are completed through a control panel 13.
  • a manual rheostat 14 is also connected thereto for adon the entry side of each stand, by load cells 17 and 13 mounted on the stands so as to be afiected by the stretch thereof under load, or by shunts 19 and 2t) responsive to the current drawn by motors?) and 4. Whatever the.
  • FIGURE 2 shows the circuits of the speed-control system for motor 4 indicated schematically in FIGURE 1.
  • the motor of each succeeding stand is provided with the same speed-control system.
  • Control of the speed'of motor 4 is efiected by varying the excitation of its field' the winding of which, indicated at 23, is connected across an excitation bus 24, 24 in series with rhcostat 6 and regulator 7.
  • Regulator 7 has a dilterential field 25 which normally tends to reduceits terminal voltage, and acts to stabilize this voltage when excitation is maintained by a main or control field winding 27 adapted to be connected across generator 5 in series with potentiometer 10.
  • Regulator 7 has a third field winding 26 adapted to be connected across regulator 9 in order to anticipate the speed levels to be controlled.
  • Regulator 3 has a difierential stabilizing field winding 28 and a speed-anticipating field winding 29 connected across the secondary of a transformer 39 the primary of which is connected across generator 5.
  • Regulator 9 has a main or control field winding 31 connected across an excitation bus 32, 32 in series with potentiometer 1t and rheostat 14. Currentlimiting resistors are indicated in FIGURE 2 by blocks labeled R. The resistance elements of the rheostats are similarly shown.
  • the speed-control system of FIGURE 2 is brought into play through the operation of relays 21 and 22 and auxiliary relays shown in FIGURE 3 which will be desig-.
  • motors 3 and 4 When the mill is idling, motors 3 and 4 turn at their no-load speeds determined by the setting of rheostats 6.
  • relay 21 As the breakdown enters-stand 1, relay 21 is energized after the lapse of a definite time, completing a circuit for relay 33 at contact 21a (see FIGURE 3). thereupon opens contacts 33a, 33b and 330 and closes This relay 7 3,151, sea
  • Reduction of the speed of motor 4- is effected as explained above while the leading end of the breakdown is advancing from stand 1 to stand 2.
  • the breakdown causes energization of relay 22 which closes a contact 22a, energizing a relay 34 (see FIGURE 3).
  • Relay 34 opens a contact 34:: in the circuit of relay 33, deenergizing the latter, whereupon it closes contacts 33a, 33b and 330 and opens contacts 33a, 33a and 33 This takes the supplemental speed-control means for motor 4 out of operation.
  • Relay 34 also closes a contact 34! energizing a relay 35.
  • Relay 22 also closes a contact 22b and brings into operation a similar speed-control means for the motor driving the third stand by energizing a relay as and so on up to the sixth and last stand.
  • Timers 21' and 22, shown in FIGURE 2 are used to incorporate proper timing between the initiating signal and energization of relays 21 md 22 so that the controls can be initiated at the proper instant with respect to position of the leading or trailing end of a breakdown.
  • the system of our invention not only decelerates the motors driving the several stands successively as the leading end of a breakdown approaches them but also effects a similar speed adiustmerit as the trailing end leaves the preceding stand.
  • the motors return to their normal rolling speeds as determined by the settings of their rheostats 6 and 60.
  • relay 21 is deenergized, closing a contact 2117.
  • a contact 35a having previously been closed by relay 35, relay 33 is again energized and closes its own sealing circuit at contact 33g.
  • the second energization of relay 33 again brings into operation the supplemental speed control means to reduce the speed of motor 4 slightly, increasing the tension etween the second and third stands to compensate for the loss of tension between the first and second.
  • relay 22 is deenergized, opening the circuit of relay 34 at contact 22a.
  • Deenergization of relay 34 opens the circuit of relay 35 at contact 3419 and deenergization of relay 35 opens contact 351: deenergizing relay 33. This restores all the control elements for motor 4 to starting conditions.
  • Contacts 39a and 395 are those of a relay similar to relays 21 and 22, controlled by the entrance of the breakdown into the third stand.
  • our invention provides means effective to prevent excessive tension on the leading end of a breakdown as it enters successive stands of a continuous mill and to compensate for loss of tension on the trailing end as it leaves successive stands.
  • variations from desired gage in the portions of the finished strip adjacent the ends are greatly reduced and a more nearly uniform gage is maintained throughout the entire length or" the strip.
  • the system is fully automatic and requires no attention when it has once been installed and adjusted.
  • t continuous rolling mill comprising several mill stands arranged in tandem, a motor for driving the rolls of each stand, a control for each motor for normally maintaining the rotation of the rolls of its associated stand at a predetermined substantially constant speed, a supplemental control for the motor or" the second stand to cause a predetermined reduction in the speed thereof, means associated with the ihst stand and operable by the entrance of the leading end of a breakdown thereinto to operate the said supplemental control to decrease the speed of the second stand only, and means operable after entrance of the leading end of the breakdown into the second stand to operate the supplemental control to bring the motor of the second stand back to its original speed.
  • a continuous rolling mill comprising several mill stands arranged in tandem, a motor for driving the rolls of each stand, a control for each motor for normally maintaining the rotation of the rolls of its associated stand at a predetermined substantially constant speed, a supplemental control for the motor of the second stand to cause a predetermined reduction in the speed thereof, means associated with the first stand and operable by the passage of the trailing end of a breakdown therebeyond to operate the said supplementm control to decrease the speed of the econd stand only, and means operable by the passage of the trailing end of a breakdown from the second stand to operate said supplemental control to bring the motor of the second stand back to its original speed.
  • a continuous rolling mill comprising several mill stands arranged in tandem, a motor for driving the rolls of each stand, a control for each motor for maintaining the rotation of the rolls of its associated stand at a predetermined substantially constant speed, a supplemental control for the motor of each stand after the first to cause a predetermined reduction in the speed of the associated motor, means associated with each stand except the last and operable by the entrance of the leading end of a breakdown thereinto to operate only the supplemental control of the next succeeding stand to decrease the speed thereof, and means operable after entrance of the leading end of the breakdown into the said next succeeding stand to operate the supplemental control associated therewith to bring the motor of the said next succeeding stand back to its original speed.
  • a continuous rolling mill comprising several mill stands arranged in tandem, a motor for driving the rolls of each stand, a control for each motor for maintaining the rotation of the rolls of its associated stand at a predetermined substantially constant speed, a supplemental control for the motor of each stand after the first to cause a predetermined reduction in the speed of the associated motor, means associated with each stand except the last and operable by the entrance of the leading end of a breakdown thereinto to operate only the supplemental control of the next succeeding stand to decrease the speed thereof, means operable after entrance of the leading end of the breakdown into the next succeeding stand to operate the supplemental control associated therewith to bring the motor of the said next succeeding stand back to its original speed, means associated with each stand except the last two and operable by the passage of the trailing end ofthe breakdown therebeyond to operate only the supplemental control of the next succeeeding stand to decrease the speed thereof, and means operable by the passage of the trailing end of the breakdown from the last mentioned next succeeding stand to operate the supplemental control associated therewith to bring the motor of
  • the continuous method of hot rolling a breakdown into strip comprising passing the breakdown through a series of roll stands while driving each of the rolls at a predetermined normal speed and as the trailing end of the breakdown reaches the rolls of a stand, temporarily decreasing the speed or the ,rolls of the next succeeding stand a predetermined amount while maintaining each of the other stands at its normal speed to progressively reduce said trailing end to substantially the same gage asithe length of the breakdown preceding the trailing end, and returning the said next succeeding stand to its normal speed as soon as the trailing end of the breakdown passes from the said, next succeeding stand.
  • the continuous method of hot rolling a breakdown into strip comprising passing the breakdown through a series of roll stands while driving each of the rolls at a predetermined normal speed and as the leading end of the breakdown reaches the rolls of a stand, temporarily decreasing the speed of the rolls of the next succeeding stand a predetermined amount while maintaining each of the other stands at its normal speed to prog'ressily reduce said leading end to substantially the same gage as the length of the-breakdown following the leading end is reduced, and returning the said next suc-. ceeding stand to its normal speed when the said leading end reaches the said next succeeding stand.
  • strip detector means operative with said strip at a predetermined location relative to one of said first and second devices for providing a first control signal when the strip is not present at said location
  • operation sensing means responsive to said first control signal and operative with the other of said devices for providing a second control signal having a value that follows a predetermined operation of said other device when said first control signal is not provided
  • a control member operative withsaid other device and responsive to said first control signal for controlling the operation of said other device in accordance with a predetermined value of said second control signal when the strip is not present at said predetermined location.
  • a temperature responsive strip detector device operative with said strip at a predetermined loca tion relativeto one of said firstand second devices for providing a first control signal in accordance with the temperature or" any strip present at said location
  • operation sensing means responsive to said first control signal and being operative with the other of said first and second devices for providing a second control signal having a value that varies in accordance with a predetermined operation of. said other device and as long as said first control signal is not provided
  • acontrol device operative with said other device and responsive to said.
  • first control signal for controlling the operation of said other device in accordance with a predetermined value of said secondcontrol signal that is present when the strip detector device does not respond to the temperature of any strip at said predetermined location.
  • motor operation sensing means operative with said motor for providing a second control signalthatvaries in accordance with a predetermined operation of said motor
  • motor control device operative with said motor and responsive to said first control signal for controlling the operation of said motor in accordance with a predetermined value of said second control signal when the strip detector means does not respond to the temperature of any strip present at said predetermined location.
  • control apparatus for a rolling mill including at least a first device having a motor operative with a pair of roller members between which a strip of material may be positioned for performing a predetermined operation relative to said strip, and with said rolling mill including a tension controlling second device for pulling on the strip relative to said first device, the combination with a strip sensing device for providing a first control signal when the strip is not present at a predetermined location relative to said mill, a motor operation sensing device operative with said motor for providing a second control signal that varies in accordance with the operation of said motor, and a control device operative with one of said first and second devices and responsive to said first control signal for controlling the operation of said one device in accordance with a predetermined function of said second control signal.
  • control apparatus for a rolling mill including at least a first device having a motor operative with a pair of roller members between which a strip of material may be positioned for performing a predetermined operation relative to said strip, and with said rolling mill including a tension controlling second device for pulling on the strip relative to said first device, the combination with a strip sensing device for providing a first control signal when the strip i not present at a predetermined location relative to said second device, a motor operation sensing device operative with said motor for providing a second control signal that varies in accordance with the operation of said motor, and a control device operative with said first device and responsive to said first control signal for controlling the operation of said first device in accordance with a predetermined function of said second signal.
  • control apparatus for a rolling mill including at least first and second devices having a pair of roller members between which a strip of material may be positioned for performing a predetermined operation relative to said strip, with said first device including a motor member, the combination with a strip sensing device for providing a first control signal when the strip is not present at a predetermined location relative to said second device, a motor operation sensing device operative with said motor for providing a second control signal that varies in accordance with the operation of said motor, and a control device operative with said second device and responsive to said first control signal for controlling the operation of said second device in accordance with a predetermined function of said second control signal.
  • control apparatus for a rolling mill including at least first and second devices, with each of said devices having a pair of roller members between which a strip of material may be positioned for performing a predetermined operation relative to said strip, and with each of said first and second devices being operative for pulling on the strip to provide tension in said strip between said first and second devices, the combination with a strip sensing device for providing a first control signal when the strip is not present at a predetermined location relative to one of said first and second devices, an operation sensing device operative with the other of said first and second devices for providing a second control signal that varies in accordance with the operation of said other device, and a control element operative with said second control device and responsive to said first control signal for controlling the operation of said second device in accordance with a predetermined function of said second control signal.
  • control apparatus for a rolling mill including at least a first device having a motor operative with a pair of roller members between which a strip of material may be positioned for performing a predetermined operation relative to said strip, and with said rolling mill including a tension controlling second device for pulling on the strip relative to said first device, the combination with a strip sensing device for providing a first control signal when the strip is not present at a predetermined location relative to said one of said first and second devices, a motor operation sensing device operative with said motor for providing a second control signal that varies in accordance with the operation of said motor, and a control device operative with the other of said first and second devices and responsive to said first control signal for controlling the operation of said other of the first and second devices in accordance with a predetermined function of said second control signal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Multiple Motors (AREA)
  • Control Of Metal Rolling (AREA)
US517504A 1955-06-23 1955-06-23 Apparatus for controlling a continuous rolling mill to maintain constant gage in theleading and trailing ends of strip lengths Expired - Lifetime US3151508A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL104993D NL104993C (ja) 1955-06-23
BE548912D BE548912A (ja) 1955-06-23
LU34447D LU34447A1 (ja) 1955-06-23
US517504A US3151508A (en) 1955-06-23 1955-06-23 Apparatus for controlling a continuous rolling mill to maintain constant gage in theleading and trailing ends of strip lengths
GB18173/56A GB813130A (en) 1955-06-23 1956-06-12 Improvements in and relating to control systems for electric motors driving rolling mills
FR1154539D FR1154539A (fr) 1955-06-23 1956-06-21 Appareil de réglage pour laminoir continu
DEU3986A DE1116308B (de) 1955-06-23 1956-06-23 Elektrische Drehzahlsteuerung fuer ein Walzwerk mit mindestens drei durch je einen Motor angetriebenen Walzgeruesten
US26587A US3029373A (en) 1955-06-23 1960-05-03 Motor speed control system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US517504A US3151508A (en) 1955-06-23 1955-06-23 Apparatus for controlling a continuous rolling mill to maintain constant gage in theleading and trailing ends of strip lengths
US26587A US3029373A (en) 1955-06-23 1960-05-03 Motor speed control system

Publications (1)

Publication Number Publication Date
US3151508A true US3151508A (en) 1964-10-06

Family

ID=26701421

Family Applications (2)

Application Number Title Priority Date Filing Date
US517504A Expired - Lifetime US3151508A (en) 1955-06-23 1955-06-23 Apparatus for controlling a continuous rolling mill to maintain constant gage in theleading and trailing ends of strip lengths
US26587A Expired - Lifetime US3029373A (en) 1955-06-23 1960-05-03 Motor speed control system

Family Applications After (1)

Application Number Title Priority Date Filing Date
US26587A Expired - Lifetime US3029373A (en) 1955-06-23 1960-05-03 Motor speed control system

Country Status (7)

Country Link
US (2) US3151508A (ja)
BE (1) BE548912A (ja)
DE (1) DE1116308B (ja)
FR (1) FR1154539A (ja)
GB (1) GB813130A (ja)
LU (1) LU34447A1 (ja)
NL (1) NL104993C (ja)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3593676A (en) * 1969-04-04 1971-07-20 Pillsbury Co Dough sheeting apparatus
US3645121A (en) * 1968-07-05 1972-02-29 Mannesmann Roehren Werke Ag Method for rolling tubular material stock in a stretch reducing mill
US3683471A (en) * 1969-03-27 1972-08-15 Jerome H Lemelson Continuous manufacturing processes and apparatus
US3775012A (en) * 1971-07-07 1973-11-27 El Ab As Means for determining distance
US4633694A (en) * 1985-02-13 1987-01-06 Kazuo Miyazaki Automatic control on strip continuous processing lines
US6148653A (en) * 1997-12-12 2000-11-21 Mitsubishi Heavy Industries, Ltd. Rolling apparatus and a rolling method
US6167736B1 (en) * 1999-07-07 2001-01-02 Morgan Construction Company Tension control system and method for reducing front end and tail end overfill of a continuously hot rolled product
US20120246917A1 (en) * 2011-04-01 2012-10-04 Ihi Corporation Continuous press apparatus for electrode band plate

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6099416A (ja) * 1983-11-04 1985-06-03 Mitsubishi Electric Corp 圧延機の速度制御装置
FR2992983B1 (fr) 2012-07-06 2014-07-04 Roquette Freres Sauces de couchage pour papier et carton contenant une dextrine a teneur elevee en amylopectine

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1871437A (en) * 1931-01-21 1932-08-16 Gen Electric Control system for rolling mills
US2153429A (en) * 1936-06-06 1939-04-04 American Rolling Mill Co Adjustment of speed-load characteristics of mill motors
US2264277A (en) * 1939-04-25 1941-12-02 Westinghouse Electric & Mfg Co Control system
US2287851A (en) * 1941-04-18 1942-06-30 Sperry Prod Inc Automatic speed control for continuous rolling mills
US2342767A (en) * 1942-02-21 1944-02-29 Westinghouse Electric & Mfg Co Control system
US2468557A (en) * 1948-01-17 1949-04-26 Gen Electric Speed control system for dynamoelectric machines
US2544467A (en) * 1947-01-31 1951-03-06 Aluminum Co Of America Tension control system
US2626376A (en) * 1950-06-29 1953-01-20 Westinghouse Electric Corp Motor control system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE672768C (de) * 1934-10-14 1939-03-09 Siemens Schuckertwerke Akt Ges Walzwerk mit durch lichtelektrische Zellen selbsttaetig gesteuertem Antrieb
DE665498C (de) * 1935-04-05 1938-09-27 Aeg Elektrischer Gleichstrom-Mehrmotorenantrieb mit Gleichlauf- und zusaetzlichen, von Ankerstrom abhaengigen Regeleinrichtungen, insbesondere fuer kontinuierliche Walzenstrassen
DE712481C (de) * 1935-09-11 1941-10-20 Aeg Einrichtung zur selbsttaetigen Geschwindigkeitsregelung von Gleichstrommotorenantrieben kontinuierlicher Warmwalzwerke
DE740338C (de) * 1937-10-10 1943-10-18 Siemens Ag Steuerschaltung fuer den elektromotorischen Antrieb der einzelnen Gerueste einer kontinuierlichen Walzenstrasse
US2401154A (en) * 1944-09-14 1946-05-28 Westinghouse Electric Corp Control system
US2830249A (en) * 1954-03-19 1958-04-08 Cutler Hammer Inc Servomechanisms

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1871437A (en) * 1931-01-21 1932-08-16 Gen Electric Control system for rolling mills
US2153429A (en) * 1936-06-06 1939-04-04 American Rolling Mill Co Adjustment of speed-load characteristics of mill motors
US2264277A (en) * 1939-04-25 1941-12-02 Westinghouse Electric & Mfg Co Control system
US2287851A (en) * 1941-04-18 1942-06-30 Sperry Prod Inc Automatic speed control for continuous rolling mills
US2342767A (en) * 1942-02-21 1944-02-29 Westinghouse Electric & Mfg Co Control system
US2544467A (en) * 1947-01-31 1951-03-06 Aluminum Co Of America Tension control system
US2468557A (en) * 1948-01-17 1949-04-26 Gen Electric Speed control system for dynamoelectric machines
US2626376A (en) * 1950-06-29 1953-01-20 Westinghouse Electric Corp Motor control system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3645121A (en) * 1968-07-05 1972-02-29 Mannesmann Roehren Werke Ag Method for rolling tubular material stock in a stretch reducing mill
US3683471A (en) * 1969-03-27 1972-08-15 Jerome H Lemelson Continuous manufacturing processes and apparatus
US3593676A (en) * 1969-04-04 1971-07-20 Pillsbury Co Dough sheeting apparatus
US3775012A (en) * 1971-07-07 1973-11-27 El Ab As Means for determining distance
US4633694A (en) * 1985-02-13 1987-01-06 Kazuo Miyazaki Automatic control on strip continuous processing lines
US6148653A (en) * 1997-12-12 2000-11-21 Mitsubishi Heavy Industries, Ltd. Rolling apparatus and a rolling method
US6167736B1 (en) * 1999-07-07 2001-01-02 Morgan Construction Company Tension control system and method for reducing front end and tail end overfill of a continuously hot rolled product
US20120246917A1 (en) * 2011-04-01 2012-10-04 Ihi Corporation Continuous press apparatus for electrode band plate

Also Published As

Publication number Publication date
DE1116308B (de) 1961-11-02
NL104993C (ja)
GB813130A (en) 1959-05-06
FR1154539A (fr) 1958-04-11
BE548912A (ja)
US3029373A (en) 1962-04-10
LU34447A1 (ja)

Similar Documents

Publication Publication Date Title
US3151508A (en) Apparatus for controlling a continuous rolling mill to maintain constant gage in theleading and trailing ends of strip lengths
US3507134A (en) Interstand tension control for tandem cold rolling mills
US2601792A (en) Apparatus for rolling strip material
US2281083A (en) Control system for rolling mills
US2949799A (en) Gage-control system for multi-stand strip mill
GB1487743A (en) Method and apparatus for controlling roll gaps of cold rolling mills
US3848443A (en) Automatic control method and apparatus for a rolling mill
US3111046A (en) Automatic control system for continuous strip mill
US2342790A (en) Control system
US3101016A (en) Rolling mills
US3109330A (en) Continuous mill control means
US3733866A (en) Method of controlling a continuous hot rolling mill
US3213656A (en) Rolling mill motor speed control apparatus
US2287283A (en) Control system
US3852983A (en) Work strip gauge change during rolling in a tandem rolling mill
US4061947A (en) Speed control system for continuous strip manufacturing apparatus
US2590491A (en) Control system
US2060672A (en) Control system
US3312091A (en) Control system for material reducing apparatus
US2092051A (en) Motor control system
US3704609A (en) Rolling mill gauge control during acceleration
US1988930A (en) Cold strip rolling mill
US2134514A (en) Control system
US3162069A (en) Method and apparatus for metal rolling
US2153429A (en) Adjustment of speed-load characteristics of mill motors