GB1142939A - Improvements in steadies for grinding machines - Google Patents

Improvements in steadies for grinding machines

Info

Publication number
GB1142939A
GB1142939A GB1858766A GB1858766A GB1142939A GB 1142939 A GB1142939 A GB 1142939A GB 1858766 A GB1858766 A GB 1858766A GB 1858766 A GB1858766 A GB 1858766A GB 1142939 A GB1142939 A GB 1142939A
Authority
GB
United Kingdom
Prior art keywords
pad
workpiece
pads
pressure
moved
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
GB1858766A
Inventor
Robert James Welsh
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.)
Churchill Machine Tool Co Ltd
Original Assignee
Churchill Machine Tool 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 Churchill Machine Tool Co Ltd filed Critical Churchill Machine Tool Co Ltd
Priority to GB1858766A priority Critical patent/GB1142939A/en
Publication of GB1142939A publication Critical patent/GB1142939A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • B24B5/421—Supports therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/065—Steady rests

Abstract

1,142,939. Grinding. CHURCHILL MACHINE TOOL CO. Ltd. 28 June, 1967 [28 April, 1966], No. 18587/66. Heading B3D. A steady for a machine for grinding crank-pins of crank-shafts for internal combustion engines comprises a plurality of bearing pads 3, 3a, 3b to support the workpiece through the intermediary of a pressure acting between each pad and the workpiece, at least one of the pads acting as a control pad, means enabling each pad to be moved radially towards or away from the workpiece whilst maintaining the pad surfaces substantially equidistant from a predetermined axis of rotation of the workpiece, and means associated with the control pad actuable in response to variation in the pressure between the pad and workpiece to effect simultaneous radial movement of each pad to compensate for the pressure variation so that the pressure associated with the control pad is maintained substantially constant. As described the workpiece 1 is supported between three pads 3, 3a, 3b, pads 3 and 3a being mounted in the frame 5 of the steady, and pad 3b being mounted in'an arm 17 which can be moved about a pivot 18 upon removal of a pin 19 to permit loading and unloading of the workpiece. Each pad is carried by a non-rotatable screw 4, 4a, 4b engaging a nut formed as a wheel 9 meshing with a worm 7. The worms 7, 7a, 7b are interconnected by chains and driven from an hydraulic or electric motor 16 so that the pads are moved simultaneously radially of the workpiece. The operative surface of each pad is formed with a pocket 21 to which fluid, such as coolant, is fed, the pressure of the fluid supporting the workpiece. One of the pads has a connection 26 to a pressure responsive switch controlling a pair of solenoid operated switches. If the pressure at the pad rises, one of the switches is actuated so that motor 16 causes the pads to move radially outwards, and if the pressure falls, the other switch actuates the motor so that the pads move radially inwards.
GB1858766A 1966-04-28 1966-04-28 Improvements in steadies for grinding machines Expired GB1142939A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1858766A GB1142939A (en) 1966-04-28 1966-04-28 Improvements in steadies for grinding machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1858766A GB1142939A (en) 1966-04-28 1966-04-28 Improvements in steadies for grinding machines

Publications (1)

Publication Number Publication Date
GB1142939A true GB1142939A (en) 1969-02-12

Family

ID=10115013

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1858766A Expired GB1142939A (en) 1966-04-28 1966-04-28 Improvements in steadies for grinding machines

Country Status (1)

Country Link
GB (1) GB1142939A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311896A2 (en) * 1987-10-14 1989-04-19 Fortuna-Werke Maschinenfabrik GmbH Follower steady rest for grinding machines
EP1216793A1 (en) * 2000-12-20 2002-06-26 TECHINT COMPAGNIA TECNICA INTERNAZIONALE S.p.A. Moving device of the skids of a steady rest for grinding
JP2009056519A (en) * 2007-08-30 2009-03-19 Jtekt Corp Rest device of grinding machine
EP2415557A1 (en) * 2010-08-03 2012-02-08 WFL Millturn Technologies GmbH & Co. KG Device and method for reducing deviations in shape and/or position, in particular the run out of a workpiece

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0311896A2 (en) * 1987-10-14 1989-04-19 Fortuna-Werke Maschinenfabrik GmbH Follower steady rest for grinding machines
EP0311896A3 (en) * 1987-10-14 1990-03-14 Fortuna-Werke Maschinenfabrik GmbH Follower steady rest for grinding machines
EP1216793A1 (en) * 2000-12-20 2002-06-26 TECHINT COMPAGNIA TECNICA INTERNAZIONALE S.p.A. Moving device of the skids of a steady rest for grinding
JP2009056519A (en) * 2007-08-30 2009-03-19 Jtekt Corp Rest device of grinding machine
EP2415557A1 (en) * 2010-08-03 2012-02-08 WFL Millturn Technologies GmbH & Co. KG Device and method for reducing deviations in shape and/or position, in particular the run out of a workpiece

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