JPS57160518A - Ram speed controlling method of metal extruding press and its device - Google Patents

Ram speed controlling method of metal extruding press and its device

Info

Publication number
JPS57160518A
JPS57160518A JP4771581A JP4771581A JPS57160518A JP S57160518 A JPS57160518 A JP S57160518A JP 4771581 A JP4771581 A JP 4771581A JP 4771581 A JP4771581 A JP 4771581A JP S57160518 A JPS57160518 A JP S57160518A
Authority
JP
Japan
Prior art keywords
speed
voltage
valve
stem
press
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.)
Granted
Application number
JP4771581A
Other languages
Japanese (ja)
Other versions
JPS597523B2 (en
Inventor
Hisao Sugiura
Yoshimi Fujiwara
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.)
Nippon Steel Corp
Sumitomo Light Metal Industries Ltd
Original Assignee
Sumitomo Light Metal Industries Ltd
Sumitomo Metal Industries 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 Sumitomo Light Metal Industries Ltd, Sumitomo Metal Industries Ltd filed Critical Sumitomo Light Metal Industries Ltd
Priority to JP4771581A priority Critical patent/JPS597523B2/en
Publication of JPS57160518A publication Critical patent/JPS57160518A/en
Publication of JPS597523B2 publication Critical patent/JPS597523B2/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C31/00—Control devices, e.g. for regulating the pressing speed or temperature of metal; Measuring devices, e.g. for temperature of metal, combined with or specially adapted for use in connection with extrusion presses

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)

Abstract

PURPOSE:To smoothly supply a high-pressure liquid in case of switching, and to prevent generation of an internal crack, by switching stem speed control after extrusion has been started by controlling the opening of a valve, in accordance with a detected value of a stem speed, in an extruding press. CONSTITUTION:In the advancing direction of a hydraulic press 2, a stem speed detecting means 12 provided with a rack 6 and consisting of a tacho-generator 10, etc. is formed. Also, a desired value is set to a valve opening setting device 30 and a stem speed setting device. After extrusion has been started, speed setting voltage of the speed setting device 40 is compared with voltage showing a stem speed of the tacho-generator 10 by a comparator 41, and its voltage difference is supplied to a low speed servo-amplifier 52 and is amplified. Driving voltage corresponding to this voltage is supplied to a servo-valve 6, pressure oil corresponding to this voltage is fed to a cylinder 62, the extent of opening of a throttle valve 14 of a valve means 18 is increased or decreased, and a ram speed of the press 2 is controlled.
JP4771581A 1981-03-31 1981-03-31 Ram speed control method and device in metal extrusion press Expired JPS597523B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4771581A JPS597523B2 (en) 1981-03-31 1981-03-31 Ram speed control method and device in metal extrusion press

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4771581A JPS597523B2 (en) 1981-03-31 1981-03-31 Ram speed control method and device in metal extrusion press

Publications (2)

Publication Number Publication Date
JPS57160518A true JPS57160518A (en) 1982-10-02
JPS597523B2 JPS597523B2 (en) 1984-02-18

Family

ID=12782998

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4771581A Expired JPS597523B2 (en) 1981-03-31 1981-03-31 Ram speed control method and device in metal extrusion press

Country Status (1)

Country Link
JP (1) JPS597523B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100704547B1 (en) * 2006-02-10 2007-04-09 (주)유창금속 Extruding machine of uniform velocity controll
JP2013039581A (en) * 2011-08-11 2013-02-28 Ube Machinery Corporation Ltd Extrusion press apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100704547B1 (en) * 2006-02-10 2007-04-09 (주)유창금속 Extruding machine of uniform velocity controll
JP2013039581A (en) * 2011-08-11 2013-02-28 Ube Machinery Corporation Ltd Extrusion press apparatus

Also Published As

Publication number Publication date
JPS597523B2 (en) 1984-02-18

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