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JPS5577920A - Draft controller for rolling mill - Google Patents

Draft controller for rolling mill

Info

Publication number
JPS5577920A
JPS5577920A JP15009578A JP15009578A JPS5577920A JP S5577920 A JPS5577920 A JP S5577920A JP 15009578 A JP15009578 A JP 15009578A JP 15009578 A JP15009578 A JP 15009578A JP S5577920 A JPS5577920 A JP S5577920A
Authority
JP
Japan
Prior art keywords
command
pulse
draft
counter
given
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.)
Pending
Application number
JP15009578A
Other languages
Japanese (ja)
Inventor
Masaaki Nakajima
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
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
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP15009578A priority Critical patent/JPS5577920A/en
Publication of JPS5577920A publication Critical patent/JPS5577920A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Metal Rolling (AREA)

Abstract

PURPOSE: To carry out the high accurate draft control with a few hardwares, by utilizing the data given as the pulse train for operating the draft control signal.
CONSTITUTION: The command from the controller 11 is given to the gate 22 which produces the draft position command B; this pulse B is inputted to the difference counter 33 whose output is converted to the analogue signal through the D/A converter 28. This analogue signal actuates the servo-valve 10, whose action varies the draft position through the position detector 7 and the position detecting receiver 26. The receiver 26 is internally provided with the basic clock generator and produces the position detecting pulse C synchronously to the timing of this clock A. The pulse C is given to the counter 33 so as to be summed up in the reverse direction to the command B. Many pulses C are taken in correspondingly to the command B, and the value corresponding to the difference between the command value and the feedback value is taken as the output of the counter 33.
COPYRIGHT: (C)1980,JPO&Japio
JP15009578A 1978-12-06 1978-12-06 Draft controller for rolling mill Pending JPS5577920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15009578A JPS5577920A (en) 1978-12-06 1978-12-06 Draft controller for rolling mill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15009578A JPS5577920A (en) 1978-12-06 1978-12-06 Draft controller for rolling mill

Publications (1)

Publication Number Publication Date
JPS5577920A true JPS5577920A (en) 1980-06-12

Family

ID=15489394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15009578A Pending JPS5577920A (en) 1978-12-06 1978-12-06 Draft controller for rolling mill

Country Status (1)

Country Link
JP (1) JPS5577920A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471281A (en) * 1981-06-17 1984-09-11 Mitsubishi Denki Kabushiki Kaisha Digital control device
EP0156341A2 (en) 1984-03-28 1985-10-02 Ppg Industries, Inc. Treatment of ultrafiltrate by electrodialysis

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4471281A (en) * 1981-06-17 1984-09-11 Mitsubishi Denki Kabushiki Kaisha Digital control device
EP0156341A2 (en) 1984-03-28 1985-10-02 Ppg Industries, Inc. Treatment of ultrafiltrate by electrodialysis
US4581111A (en) * 1984-03-28 1986-04-08 Ppg Industries, Inc. Treatment of ultrafiltrate by electrodialysis

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