GB1352910A - Method and apparatus for straightening elongated workpieces - Google Patents

Method and apparatus for straightening elongated workpieces

Info

Publication number
GB1352910A
GB1352910A GB4091771A GB4091771A GB1352910A GB 1352910 A GB1352910 A GB 1352910A GB 4091771 A GB4091771 A GB 4091771A GB 4091771 A GB4091771 A GB 4091771A GB 1352910 A GB1352910 A GB 1352910A
Authority
GB
United Kingdom
Prior art keywords
bending
strokes
increment
straightening
error
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
Application number
GB4091771A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB1352910A publication Critical patent/GB1352910A/en
Expired 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
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/10—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts between rams and anvils or abutments
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S72/00—Metal deforming
    • Y10S72/702—Overbending to compensate for springback

Abstract

1352910 Straightening R GALDABINI 2 Sept 1971 [6 Nov 1970] 40917/71 Addition to 1185927 Heading B3E [Also in Divisions G1 and G3] The method of straightening an elongated workpiece as described in Specification 1,185,927 is modified in that succeeding bending strokes of the ram are increased by preselected amounts rather than as a function of the residual error between the actual and desired final shape of the workpiece. After imparting a first bending stroke S 1 to the bar as in Specification 1,185,927, bending strokes S 2 , S 3 , each exceeding the preceding stroke by an increment a, are applied to the bar until the error E between the actual and desired final shape falls below a first preselected value E A . Subsequently, bending strokes S 4 -S 6 are applied to the bar until the measured error E is below a second preselected value E B , the strokes S 4 -S 6 increasing progressively by an increment b which is less than the increment a. The increments a and b in the two bending stages need not be constant and more than two stages may be provided. The apparatus for carrying out the method is similar to that described in the parent Specification.
GB4091771A 1970-11-06 1971-09-02 Method and apparatus for straightening elongated workpieces Expired GB1352910A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT3142770 1970-11-06

Publications (1)

Publication Number Publication Date
GB1352910A true GB1352910A (en) 1974-05-15

Family

ID=11233619

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4091771A Expired GB1352910A (en) 1970-11-06 1971-09-02 Method and apparatus for straightening elongated workpieces

Country Status (4)

Country Link
US (1) US3713312A (en)
DE (1) DE2133586A1 (en)
FR (1) FR2112487B2 (en)
GB (1) GB1352910A (en)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2346796A1 (en) * 1973-09-17 1975-04-03 Eitel Kg Werzeugmaschinenfabri AUTOMATIC LEVELING PROCEDURE AND LEVELING MACHINE FOR MULTIPLE LEVELING POINTS
DE2346797A1 (en) * 1973-09-17 1975-04-03 Eitel Kg AUTOMATIC STRAIGHTING PROCEDURE AND STRAIGHTING PRESS WITH ONE STRAIGHTING OFFICE
JPS5162172A (en) * 1974-11-29 1976-05-29 Toyoda Machine Works Ltd HIZUMITORIHOHO
IT1097410B (en) * 1978-07-26 1985-08-31 Galdabini Renzo MACHINE FOR AUTOMATIC STRAIGHTENING OF ELONGATED PIECES
US4408471A (en) * 1980-10-29 1983-10-11 Massachusetts Institute Of Technology Press brake having spring-back compensating adaptive control
SE426558B (en) * 1981-04-01 1983-01-31 Mensor Ab ADAPTIVE PROCEDURE AND DEVICE FOR CORRECTING FORMAL DEFICIENCY
US4511976A (en) * 1982-07-06 1985-04-16 Cincinnati Incorporated Press brake having spring back compensation stroke reversal control
US4499769A (en) * 1983-04-04 1985-02-19 The United States Of America As Represented By The Secretary Of The Army Acoustic emission monitoring
EP0127935B1 (en) * 1983-04-23 1987-01-21 The Permanent Way Equipment Company Limited Method of and apparatus for bending and straightening
US4700439A (en) * 1984-07-17 1987-10-20 Hines Industries, Inc. Driveshaft fabricating apparatus
ATE37212T1 (en) * 1985-06-28 1988-09-15 Plasser Bahnbaumasch Franz MOBILE TRACK PROCESSING MACHINE AND METHOD FOR BENDING THE RAIL END OF LAYED TRACKS IN THE AREA OF JOINTS.
US4813255A (en) * 1986-02-21 1989-03-21 Hewlett-Packard Company System for sensing and forming objects such as leads of electronic components
US4802357A (en) * 1987-05-28 1989-02-07 The Boeing Company Apparatus and method of compensating for springback in a workpiece
DE4001901A1 (en) * 1990-01-19 1991-07-25 Mannesmann Ag End straightening mechanism for pipes etc. - has several sliding rams, radially movable about common axis
US4986101A (en) * 1990-05-25 1991-01-22 Eaton Corporation Process and apparatus for reforming brake shoes
FI88282C (en) * 1990-11-28 1993-04-26 Kone Oy Equipment for checking the straightness of lift guides
WO2002083188A2 (en) * 2001-04-16 2002-10-24 Cassidy James J Dense/porous structures for use as bone substitutes
US10245630B2 (en) 2015-09-03 2019-04-02 Caterpillar Inc. Smart fixture distortion correction system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3459018A (en) * 1966-02-04 1969-08-05 Univ Court Of The Univ Of Glas Method of and apparatus for bending bars
US3481170A (en) * 1966-08-06 1969-12-02 Renzo Galdabini Method and apparatus for straightening elongated pieces

Also Published As

Publication number Publication date
FR2112487A2 (en) 1972-06-16
US3713312A (en) 1973-01-30
DE2133586A1 (en) 1972-05-10
FR2112487B2 (en) 1974-09-27

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee