GB1021822A - Improvements in or relating to centreless grinding machines - Google Patents

Improvements in or relating to centreless grinding machines

Info

Publication number
GB1021822A
GB1021822A GB20140/61A GB2014061A GB1021822A GB 1021822 A GB1021822 A GB 1021822A GB 20140/61 A GB20140/61 A GB 20140/61A GB 2014061 A GB2014061 A GB 2014061A GB 1021822 A GB1021822 A GB 1021822A
Authority
GB
United Kingdom
Prior art keywords
grinding
workpieces
feed
wheel
truing
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
GB20140/61A
Inventor
John Cyril Jones
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 GB20140/61A priority Critical patent/GB1021822A/en
Priority to FR899632A priority patent/FR1324153A/en
Publication of GB1021822A publication Critical patent/GB1021822A/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
    • B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
    • B24B49/18—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation taking regard of the presence of dressing tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q15/00—Automatic control or regulation of feed movement, cutting velocity or position of tool or work
    • 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
    • B24B5/18—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centreless means for supporting, guiding, floating or rotating work

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Abstract

1,021,822. Grinding. CHURCHILL MACHINE TOOL CO. Ltd. May 22, 1962 [June 5, 1961], No. 20140/61. Heading B3D. Control apparatus for a centreless grinding machine of the through feed type comprises timing means for initiating a truing cycle for the grinding wheel and suspending the grinding operation after a predetermined interval of grinding, means for recommencing the grinding operation after the truing cycle has been completed and means for providing a compensating feed to the grinding wheel and/or control wheel. The control wheel 3 and its drive are mounted on a slide movable, by a screw and nut mechanism, towards the grinding wheel 2. For fine feed the screw is rotated by an electric motor FCM and for coarse feed the nut is rotated by an electric motor CCM. A hand wheel 39 is provided for manual adjustment. A truing diamond 23 is traversable to and fro across the face of the grinding wheel 2 by an electric motor 22, downfeed of the diamond being effected by motor 24. Workpieces, e.g. needle rollers, are loaded into a rotary bowl feeder hopper 17, driven by motor 18, which discharges them along a work blade 20 between the grinding and control wheels 2, 3, the ground workpieces then passing through a pneumatic gauge head 21. If, due to wear of the grinding wheel, the gauged diameters are persistently oversize an automatic fine compensation feed is applied to the control wheel, this feed being repeated at timed intervals until the diameter is again brought into the permitted tolerance. If, for any unforeseen reason, the gauged diameters are persistently undersize the hopper motor 18 is stopped. At intervals determined by a timer the hopper feed is stopped and after a further short interval, sufficient to allow the workpieces that have already left the hopper to pass the grinding wheel, the truing cycle is initiated. While truing is in progress, coarse compensation is applied to the control wheel, the amount of compensation being set to advance the control wheel by an amount slightly less than the depth of cut of the truing diamond. Thus the first workpieces ground after truing are oversize. An electromagnetic device 25 is included in the shoot 26 through which ground workpieces pass so that the oversize workpieces are diverted automatically to a bin 27 from which they can be returned to the hopper 17 for regrinding. While the workpieces are leaving the grinding throat in an oversize condition the fine compensation feed operates at intervals until workpieces are brought within the permitted tolerance; the electromagnetic device 25 is released and workpieces then pass via shoot 26 into another bin.
GB20140/61A 1961-06-05 1961-06-05 Improvements in or relating to centreless grinding machines Expired GB1021822A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB20140/61A GB1021822A (en) 1961-06-05 1961-06-05 Improvements in or relating to centreless grinding machines
FR899632A FR1324153A (en) 1961-06-05 1962-06-04 Advanced grinding machine without centers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB20140/61A GB1021822A (en) 1961-06-05 1961-06-05 Improvements in or relating to centreless grinding machines
FR899632A FR1324153A (en) 1961-06-05 1962-06-04 Advanced grinding machine without centers

Publications (1)

Publication Number Publication Date
GB1021822A true GB1021822A (en) 1966-03-09

Family

ID=26196003

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20140/61A Expired GB1021822A (en) 1961-06-05 1961-06-05 Improvements in or relating to centreless grinding machines

Country Status (2)

Country Link
FR (1) FR1324153A (en)
GB (1) GB1021822A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH617380A5 (en) * 1977-05-05 1980-05-30 Maag Zahnraeder & Maschinen Ag

Also Published As

Publication number Publication date
FR1324153A (en) 1963-04-12

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