JPS57202929A - Bender - Google Patents

Bender

Info

Publication number
JPS57202929A
JPS57202929A JP8682881A JP8682881A JPS57202929A JP S57202929 A JPS57202929 A JP S57202929A JP 8682881 A JP8682881 A JP 8682881A JP 8682881 A JP8682881 A JP 8682881A JP S57202929 A JPS57202929 A JP S57202929A
Authority
JP
Japan
Prior art keywords
work
driving part
upward
apron
ram
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
JP8682881A
Other languages
Japanese (ja)
Inventor
Katsumi Koyama
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.)
Amada Co Ltd
Original Assignee
Amada Co 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 Amada Co Ltd filed Critical Amada Co Ltd
Priority to JP8682881A priority Critical patent/JPS57202929A/en
Publication of JPS57202929A publication Critical patent/JPS57202929A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/006—Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam

Abstract

PURPOSE:To bend a work with less angular difference between left and right parts of the work, by providing a mechanism, which keeps the upward movenent of a ram balanced, in the driving part of a bender. CONSTITUTION:The driving part of a press brake is provided with a lower apron, namely, a movable ram 9 which is moved freely vertically for an upper apron, cylinders 17 and 19 which move the movable ram 9 upward, and a balance controlling mechanism 21 which makes the pressing force balanced to keep the upward movement of the movable ram 9 parallel. A bending indicator which detects a bending angle directly from a work is provided in either of the upper apron and the lower apron 9 at least, and the feedback control for the driving part is performed by a detection signal from the indicator. Thus, the work is bent with less angular difference between left and right parts of the work at a desired angle in accordance with the thickness, the tensile strength, etc. of the work and the change of a mold.
JP8682881A 1981-06-08 1981-06-08 Bender Pending JPS57202929A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8682881A JPS57202929A (en) 1981-06-08 1981-06-08 Bender

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8682881A JPS57202929A (en) 1981-06-08 1981-06-08 Bender

Publications (1)

Publication Number Publication Date
JPS57202929A true JPS57202929A (en) 1982-12-13

Family

ID=13897668

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8682881A Pending JPS57202929A (en) 1981-06-08 1981-06-08 Bender

Country Status (1)

Country Link
JP (1) JPS57202929A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0230326A (en) * 1988-07-19 1990-01-31 Yamazaki Mazak Corp Press brake with work measuring means and measuring method for work thereof
JP2001347320A (en) * 2000-06-05 2001-12-18 Amada Co Ltd Method and apparatus for bending

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53120671A (en) * 1977-03-31 1978-10-21 Amada Co Ltd Bending angle setting process at bending machine and device
JPS542973A (en) * 1977-06-09 1979-01-10 Maru Kikai Kogyo Parallellmoving device for ram of pressing machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53120671A (en) * 1977-03-31 1978-10-21 Amada Co Ltd Bending angle setting process at bending machine and device
JPS542973A (en) * 1977-06-09 1979-01-10 Maru Kikai Kogyo Parallellmoving device for ram of pressing machine

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0230326A (en) * 1988-07-19 1990-01-31 Yamazaki Mazak Corp Press brake with work measuring means and measuring method for work thereof
JPH0470091B2 (en) * 1988-07-19 1992-11-10 Yamazaki Mazak Corp
JP2001347320A (en) * 2000-06-05 2001-12-18 Amada Co Ltd Method and apparatus for bending

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