US3402592A - Manipulators - Google Patents

Manipulators Download PDF

Info

Publication number
US3402592A
US3402592A US530420A US53042066A US3402592A US 3402592 A US3402592 A US 3402592A US 530420 A US530420 A US 530420A US 53042066 A US53042066 A US 53042066A US 3402592 A US3402592 A US 3402592A
Authority
US
United States
Prior art keywords
piston
cylinder
press
peel
forging
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
US530420A
Other languages
English (en)
Inventor
Machon Edward
Bathory Bela Istvan
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.)
Davy Loewy Ltd
Original Assignee
Davy Loewy 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 Davy Loewy Ltd filed Critical Davy Loewy Ltd
Application granted granted Critical
Publication of US3402592A publication Critical patent/US3402592A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J13/00—Details of machines for forging, pressing, or hammering
    • B21J13/08—Accessories for handling work or tools
    • B21J13/10—Manipulators

Definitions

  • the main mass of the manipulator should ⁇ move continuously in the direction of forging, and since while the Aworkpiece is gripped by the press tools it cannot move, the peel is mounted on the manipulator car- ICC of the cylinder and having passages opening adjacent the end face of the piston on either side of the projection and opening at the end face of the projection.
  • FIG. 1 is an axial section through a piston and cyl inder assembly in its datum position
  • FIG. 2 is a diagrammatic view of the assembly shown at the end of recoil when forging away from the press
  • FIG. 3 is a diagrammatic view of the assembly shown with the piston having returned to the datum position from the FIG. 2 position,
  • FIG. 4 is a diagrammatic view of the assembly shown at the end of the recoil when forging towards the press, and
  • FIG. 5 is a diagrammatic view of the assembly shown with the piston having almost returned to the datum position from the FIG. 4 position.
  • the apparatus shown in FIG. 1 is of the kind having a single piston and a single cylinder.
  • a piston rod 12 is pivotally mounted at 13 on a manipulator 14 the construction of which is Well known ⁇ in itself.
  • the piston rod 12 is slidable in a cylinder 1S which is secured by bolts 16 to the peel of the manipulator, lpart of which peel is shown at 17.
  • An end cover 18 is secured to one end of the peel by bolts 20 and has a sleeve portion 21 projecting into the bore of that end of the cylinder and an end portion 22 the bore of which has a smaller diameter than the bore ⁇ nf the. sleeve rmrh'm. o1 rnMm/l .u n
  • the manipulator carrying the piston rod, moves to the left in the figures, and can move relative to the peel to the position shown in FIGURE 2 for maximum recoil at the end of the press working stroke.
  • the openings 47 and 48 are both open to drain.
  • the piston rod has moved relative to the cylinder and piston until the stop surface 55a engages the inner projections 60 of the surface 56.
  • FIGURE 3 shows the cylinder arrangement just before the datum position is regained. Hydraulic fluid is trapped in the annular space 57 and can only escape through opening 52 passage 53 and opening 54, and through the clearances between the rod and the protrusion 50. This restricted flow cushions the return.
  • FIGURE 4 shows the piston and cylinder arrangement after a maximum stroke when forging toward the press; in this position with both the openings 47 and 48 open to drain, the piston rod has moved to the right carrying with it the piston until the outer projections 60 of the piston abut stop surface 45a.
  • the arrangement is again returned to its datum position by connecting opening 48 to a pressurized source which separates the surface 56 and 45a and drives the cylinder to the right in the figures.
  • FIGURE 5 shows the arrangement when it has nearly regained its datum position from the FIGURE 4 position, in this case uid is trapped in the chamber 58 between the cylinder and the protrusion 50 and can only escape through the passage S3 which again produces a cushioning effect.
  • control side of the cylinder is connected to exhaust, so that the manipulator drive motor does not work against any force other than the force caused by the hydraulic uid being displaced.
  • a control signal from the press position control at the end of a bite may be used to connect opening 48 to a pressurized source.
  • the control side of the cylinder may be constantly connected to a pressure source so that it always biases the arrangement to its datum position.
  • the cylinder being connected with an accumulator and any oil losses from the circuit being catered for by means of a pressure switch and unloader valve, or a constant pressure 55 in the cylinder may be obtained by use of a relief valve to drain any excess of pressure build up.
  • forging may take place in either direction, a single control valve or no control valve is needed, mechanical stops automatically provide a datum position before such working stroke, and a built in cushioning device acts whether forging to or away from the press.
  • An assembly comprising a cylinder member encircling a piston rod member, a peel connected to one of said members, and a manipulator carriage connected to the other of said members, said piston rod being formed with a central portion of smaller diameter than portions of said rod nearer its ends so as to form a first pair of internally facing annular stop surfaces, and said cylinder being formed with a bore having a central portion of enlarged diameter so as to form a second pair of internally facing stop surfaces, and a piston slidable on the central portion of said rod between the stop surfaces on said rod and in said bore between the stop surfaces of said bore, said cylinder being connected on one side of the piston to exhaust and on the other side of said piston to a pressure source which automatically drives said piston, whenever said peel is free to move, into a position in which one face of said piston abuts a stop surface on said piston rod and a stop surface of said bore which are both on the same side of said piston and thereby locates said peel in a datum position relative to said carriage intermediate two extreme positions relative to said carriage

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Manipulator (AREA)
US530420A 1965-03-02 1966-02-28 Manipulators Expired - Lifetime US3402592A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8901/65A GB1141061A (en) 1965-03-02 1965-03-02 Manipulators

Publications (1)

Publication Number Publication Date
US3402592A true US3402592A (en) 1968-09-24

Family

ID=9861502

Family Applications (1)

Application Number Title Priority Date Filing Date
US530420A Expired - Lifetime US3402592A (en) 1965-03-02 1966-02-28 Manipulators

Country Status (3)

Country Link
US (1) US3402592A (enrdf_load_stackoverflow)
DE (1) DE1302433C2 (enrdf_load_stackoverflow)
GB (1) GB1141061A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990351A (en) * 1972-03-10 1976-11-09 Atlas Copco Aktiebolag Pneumatic impact device
US4294163A (en) * 1979-10-29 1981-10-13 Mcdonnell Douglas Corporation Non adjustable hydraulic cylinder
US4337686A (en) * 1979-03-08 1982-07-06 Tokico Ltd. Hydraulic force multiplying device
US4366742A (en) * 1979-04-16 1983-01-04 Tokico Ltd. Hydraulic force multiplying device
US4852467A (en) * 1985-08-10 1989-08-01 Friedrich Wilh. Schwing Gmbh Spool valve for concrete pumps
US6487954B2 (en) * 2001-03-14 2002-12-03 The United States Of America As Represented By The Secretary Of The Navy Piston deceleration system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US845827A (en) * 1905-12-04 1907-03-05 George F Steedman Fluid-actuated regulated cushioned hoist.
US1845797A (en) * 1926-09-18 1932-02-16 Kearney & Trecker Corp Fluid operated means for support movements
US2649842A (en) * 1947-05-16 1953-08-25 Electro Hydraulics Ltd Fluid pressure motor comprising relatively extensible and contractible piston and cylinder elements
US3250247A (en) * 1963-09-26 1966-05-10 Par Way Mfg Co Apparatus for greasing baking pans
US3274819A (en) * 1962-04-04 1966-09-27 British Iron Steel Research Forging presses
US3279563A (en) * 1965-01-15 1966-10-18 Otis Elevator Co Ram assembly with floating piston seal

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US845827A (en) * 1905-12-04 1907-03-05 George F Steedman Fluid-actuated regulated cushioned hoist.
US1845797A (en) * 1926-09-18 1932-02-16 Kearney & Trecker Corp Fluid operated means for support movements
US2649842A (en) * 1947-05-16 1953-08-25 Electro Hydraulics Ltd Fluid pressure motor comprising relatively extensible and contractible piston and cylinder elements
US3274819A (en) * 1962-04-04 1966-09-27 British Iron Steel Research Forging presses
US3250247A (en) * 1963-09-26 1966-05-10 Par Way Mfg Co Apparatus for greasing baking pans
US3279563A (en) * 1965-01-15 1966-10-18 Otis Elevator Co Ram assembly with floating piston seal

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3990351A (en) * 1972-03-10 1976-11-09 Atlas Copco Aktiebolag Pneumatic impact device
US4337686A (en) * 1979-03-08 1982-07-06 Tokico Ltd. Hydraulic force multiplying device
US4366742A (en) * 1979-04-16 1983-01-04 Tokico Ltd. Hydraulic force multiplying device
US4294163A (en) * 1979-10-29 1981-10-13 Mcdonnell Douglas Corporation Non adjustable hydraulic cylinder
US4852467A (en) * 1985-08-10 1989-08-01 Friedrich Wilh. Schwing Gmbh Spool valve for concrete pumps
US6487954B2 (en) * 2001-03-14 2002-12-03 The United States Of America As Represented By The Secretary Of The Navy Piston deceleration system

Also Published As

Publication number Publication date
DE1302433C2 (de) 1973-09-20
DE1302433B (enrdf_load_stackoverflow) 1973-03-08
GB1141061A (en) 1969-01-22

Similar Documents

Publication Publication Date Title
US10690154B2 (en) Piezohydraulic actuator
US3540348A (en) Fluid operated continuously actuated reciprocating piston drive
US5058385A (en) Pneumatic actuator with hydraulic control
US4424737A (en) Stroke cushioning apparatus for hydraulic cylinders
US4231434A (en) Hydraulic impact device
US3402592A (en) Manipulators
US20170008067A1 (en) Forging machine
GB962849A (en) Hydraulic actuator
US3425498A (en) Fluid actuated vibrator devices
CN102016330B (zh) 流体压缸
KR900000603A (ko) 힘이 증가되는 유체-작동식 작동기
US3668975A (en) Decelerator means for expansible chamber device
US3105414A (en) High energy impactor apparatus
US3150569A (en) Piston mechanism
US3502001A (en) Fluid operated cylinder
GB1528038A (en) Cylinder-piston arrangement
US3559538A (en) Actuator
US3776100A (en) Cushion device
JPH10246207A (ja) 油圧シリンダー用スナッバー
US5992584A (en) Dashpot for power cylinder
US4250793A (en) Cushioning device for fluid jacks
US3314335A (en) Actuator locking mechanism
US3412645A (en) Pneumatic motor of the reciprocable type
US3490341A (en) Hydraulic ram
US3276206A (en) Pressure intensifier mechanism