US3680339A - Work start synchronizer in plural press brakes coupling operation - Google Patents

Work start synchronizer in plural press brakes coupling operation Download PDF

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Publication number
US3680339A
US3680339A US48193A US3680339DA US3680339A US 3680339 A US3680339 A US 3680339A US 48193 A US48193 A US 48193A US 3680339D A US3680339D A US 3680339DA US 3680339 A US3680339 A US 3680339A
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US
United States
Prior art keywords
movable
tables
pilot
synchronizing
descent
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
US48193A
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English (en)
Inventor
Masahiro Hayakawa
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
Application granted granted Critical
Publication of US3680339A publication Critical patent/US3680339A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D15/00—Shearing machines or shearing devices cutting by blades which move parallel to themselves
    • B23D15/12—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor
    • B23D15/14—Shearing machines or shearing devices cutting by blades which move parallel to themselves characterised by drives or gearings therefor actuated by fluid or gas pressure
    • 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
    • B21D5/01—Bending sheet metal along straight lines, e.g. to form simple curves between rams and anvils or abutments
    • 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
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors

Definitions

  • ..B21j 9/20 mechanism which descends with a predetermined lag [58] Field of Search ..72/28, 404, 453, 441, 389, behind the descent of the movable tables, a bleed-off valve for each table, provided'in the hydraulic circuit, and a mechanism for adjusting the hydraulic pressure for driving the movable tables.
  • valve 13L In order to return the movable table 3L to its original position after completion of the bending work, the valve 13L is manually switched to the opposite position, whereby the hydraulic fluid will push the piston 15L upwards from the bottom of the main cylinder 14L, and the fluid on the return side will pass through valve 13L, and finally arrive at the outlet 18L.
  • valves 2L, 2R are secured to the leftand right-hand tables 3L, 3R, respectively, so that the size hydraulic change-over valve 13M, necessary for allowing a vertical motion of the pilot bar 7.
  • the valve 13M is operated simultaneously with the valves 13L, 13R by manual operation, as the broken line shows in connection with these valves in FIG. 2, so as to effect a change-over from descent to ascent, or vice versa, of
  • the flow-adjusting valve 9 is pre-set so that when the same is fully opened the pilot bar 7 is moved pilot cylinder 8 mounted thereon, 2L and 2R are respectively leftand right-hand phase-difference sensing bleed-off valves, with bottom projections which will be explained later in more detail.
  • 3L and 3R are moving tables on the left and right sides, 3L and 3'R are punches, 4 is a connecting punch, 5 a connecting die, 6 a coupled section of a foot switch, 7 a pilot bar, 9 a flow-adjusting valve, 10 a check valve.
  • 11L and 11R are fixed tables, ll'L and ll'R dies, 12L and 12R flexible tubes, 13L, 13M and 13R (left, middle and right, respectively) hydraulic change-over valves.
  • the middle valve 13M is of relatively small size.
  • 14L and 14R are main cylinders, 15L, 15M and 15R pistons, 16L, 16M and 16R hydraulic regulators, 17L, 17M and 17R, as well as 18L, 18M and 18R, and finally 19L and 19R hydraulic outlets, P a pump, and M an electric motor or other conventional drive for driving the pump P.
  • valves 2L, 2R contact the pilot bar 7,- the pressure fluid, which works to move down the pistons 15L, 15R in the respective main cylinders 14L, 14R, for operating respectively the leftand right-hand movable tables 3L, 3R, is urged to flow, past the valves 2L, 2R, to the respective outlets 19L, 19R.
  • the two press brakes are combined in proper alignment in such a manner that the pilot bar 7, the movable tables 3L, 3R and the fixed tables 11L, 11R are positioned in perfect parallel relation to each other and that the spaces or gaps between the pilot bar 7 and the bottom projections of the leftand right-hand bleed-off valves 2L, 2R are also of perfectly equal size.
  • the regulating valve 9 is slightly closed and adjusted so that during the descending stroke, under no load, the descent of the pilot bar 7 will slightly lag behind the descent of the movable tables 3L, 3R, as effected by the pistons 15L, 15R in the leftand right-hand main cylinders 14L, 14R.
  • the leftand right-hand press brakes A, B keep their synchronization and the movable-tables 3L, 3R start their bending work simultaneously. Also, when the bending work is initiated, the required distances between the bleed-off valves 2L, 2R and the pilot bar 7 are maintained, and no leakageof hydraulic fluid occurs toward the outlets 19L, 19R, thus allowing the performance of the bending work with full capacity of the hydraulic pressure, as furnished by the pump P. Y
  • pilot mechanism includes a pilot cylinder, and a pilot bar secured to a moving portion of said pilot cylinder, and wherein said bleed-off valve means are adapted to. be acted upon by respective ends of said pilot bar.
  • pilot mechanism further includes means for retaining said pilot bar in substantially parallel relation to said punches and said dies.
  • a method for synchronizing plural press brakes, associated each with a press which has a movable and a fixed table, and a hydraulic control circuit associated therewith, including bleed-off valve means, as well as a pilot mechanism for said movable tables, and means for actuating the descent of the pilot mechanism comprising the steps of operating said movable tables while keeping them in closely aligned relation, in such a manner that the descent of said pilot mechanism lags behind the descent of said movable tables, and adjusting the hydraulic pressure for driving said movable tables when said valve means engage with said pilot mechanism.
  • each press has a punch and a die respectively associated with its movable and fixed tables, further comprising the step of operatively-linking said punches, said dies and. said fixed tables by interconnecting punch, die and foot-switch sections.
  • I further comprising the step of retaining at least a portion of said pilot mechanism in substantially parallel relation to said punches and said dies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Presses (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Press Drives And Press Lines (AREA)
US48193A 1969-06-25 1970-06-22 Work start synchronizer in plural press brakes coupling operation Expired - Lifetime US3680339A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44049679A JPS4815550B1 (enrdf_load_stackoverflow) 1969-06-25 1969-06-25

Publications (1)

Publication Number Publication Date
US3680339A true US3680339A (en) 1972-08-01

Family

ID=12837848

Family Applications (1)

Application Number Title Priority Date Filing Date
US48193A Expired - Lifetime US3680339A (en) 1969-06-25 1970-06-22 Work start synchronizer in plural press brakes coupling operation

Country Status (2)

Country Link
US (1) US3680339A (enrdf_load_stackoverflow)
JP (1) JPS4815550B1 (enrdf_load_stackoverflow)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507941A1 (fr) * 1981-06-19 1982-12-24 Mercier J Perfectionnements aux machines-outils, en particulier aux machines a cintrer
FR2521469A1 (fr) * 1982-02-12 1983-08-19 Promecan Sisson Lehmann Cisaille a lame curviligne a commande hydraulique asservie
US4445357A (en) * 1980-11-03 1984-05-01 Kaiser Steel Corporation Pipe press
US4457156A (en) * 1981-01-29 1984-07-03 Kabushiki Kaisha Kobe Seiko Sho Horizontal tube upsetter
NL1004820C2 (nl) * 1996-12-18 1997-12-23 Delem B V Werkwijze voor het besturen van een buigpers en buigpers voorzien van besturingsmiddelen voor het besturen van de buigpers volgens de werkwijze.
US6012314A (en) * 1997-07-30 2000-01-11 Northrop Grumman Corporation Individual motor pin module
US20050172796A1 (en) * 2004-02-09 2005-08-11 Bair Eugene C. Hydraulic system for synchronized extension of multiple cylinders
US20050172797A1 (en) * 2004-02-09 2005-08-11 Bair Eugene C. Hydraulic system for synchronized extension of multiple cylinders
US7322190B2 (en) 2004-02-09 2008-01-29 Jr Automation Technologies Llc Hydraulic system for synchronized extension of multiple cylinders
CN100391705C (zh) * 2006-06-29 2008-06-04 沈阳重型机械集团有限责任公司 单层热压机液压-机械复合同步机构
US20080271445A1 (en) * 2007-05-01 2008-11-06 J.R. Automation Technologies, Llc Hydraulic circuit for synchronized horizontal extension of cylinders
US20200147829A1 (en) * 2018-11-13 2020-05-14 Shane Fiore Portable Lumber Adjuster

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6283151U (enrdf_load_stackoverflow) * 1985-11-11 1987-05-27

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764869A (en) * 1954-08-19 1956-10-02 Origins Inc Means for synchronizing the travel of two or more traveling work elements
US3393635A (en) * 1966-08-25 1968-07-23 Pacific Press & Shear Corp Independently operable press brakes having tandem coupling means
US3469435A (en) * 1966-08-08 1969-09-30 Niagara Machine & Tool Works Level control for hydraulic press brakes and the like

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2764869A (en) * 1954-08-19 1956-10-02 Origins Inc Means for synchronizing the travel of two or more traveling work elements
US3469435A (en) * 1966-08-08 1969-09-30 Niagara Machine & Tool Works Level control for hydraulic press brakes and the like
US3393635A (en) * 1966-08-25 1968-07-23 Pacific Press & Shear Corp Independently operable press brakes having tandem coupling means

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4445357A (en) * 1980-11-03 1984-05-01 Kaiser Steel Corporation Pipe press
US4457156A (en) * 1981-01-29 1984-07-03 Kabushiki Kaisha Kobe Seiko Sho Horizontal tube upsetter
FR2507941A1 (fr) * 1981-06-19 1982-12-24 Mercier J Perfectionnements aux machines-outils, en particulier aux machines a cintrer
FR2521469A1 (fr) * 1982-02-12 1983-08-19 Promecan Sisson Lehmann Cisaille a lame curviligne a commande hydraulique asservie
NL1004820C2 (nl) * 1996-12-18 1997-12-23 Delem B V Werkwijze voor het besturen van een buigpers en buigpers voorzien van besturingsmiddelen voor het besturen van de buigpers volgens de werkwijze.
US6012314A (en) * 1997-07-30 2000-01-11 Northrop Grumman Corporation Individual motor pin module
US7047738B2 (en) 2004-02-09 2006-05-23 Jr Automation Technologies, Llc Hydraulic system for synchronized extension of multiple cylinders
US20050172797A1 (en) * 2004-02-09 2005-08-11 Bair Eugene C. Hydraulic system for synchronized extension of multiple cylinders
US20050172796A1 (en) * 2004-02-09 2005-08-11 Bair Eugene C. Hydraulic system for synchronized extension of multiple cylinders
US7134280B2 (en) 2004-02-09 2006-11-14 J.R. Automation Technologies, Llc Hydraulic system for synchronized extension of multiple cylinders
US7322190B2 (en) 2004-02-09 2008-01-29 Jr Automation Technologies Llc Hydraulic system for synchronized extension of multiple cylinders
CN100391705C (zh) * 2006-06-29 2008-06-04 沈阳重型机械集团有限责任公司 单层热压机液压-机械复合同步机构
US20080271445A1 (en) * 2007-05-01 2008-11-06 J.R. Automation Technologies, Llc Hydraulic circuit for synchronized horizontal extension of cylinders
US7926410B2 (en) 2007-05-01 2011-04-19 J.R. Automation Technologies, L.L.C. Hydraulic circuit for synchronized horizontal extension of cylinders
US20200147829A1 (en) * 2018-11-13 2020-05-14 Shane Fiore Portable Lumber Adjuster
US10882208B2 (en) * 2018-11-13 2021-01-05 Shane Fiore Portable lumber adjuster

Also Published As

Publication number Publication date
JPS4815550B1 (enrdf_load_stackoverflow) 1973-05-15

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