GB650069A - Improvements relating to grinding machines - Google Patents

Improvements relating to grinding machines

Info

Publication number
GB650069A
GB650069A GB1395548A GB1395548A GB650069A GB 650069 A GB650069 A GB 650069A GB 1395548 A GB1395548 A GB 1395548A GB 1395548 A GB1395548 A GB 1395548A GB 650069 A GB650069 A GB 650069A
Authority
GB
United Kingdom
Prior art keywords
motor
grinding
predetermined value
relay
current
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
GB1395548A
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 GB1395548A priority Critical patent/GB650069A/en
Publication of GB650069A publication Critical patent/GB650069A/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
    • B24B49/16—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 load

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

650,069. Grinding-machines. CHURCHILL MACHINE TOOL CO., Ltd. May 24, 1948. No. 13955. [Class 60] [Also in Groups XXXV and XXXVII] In a precision grinding-machine fall of the load current of the grinding wheel motor below a predetermined value causes, through an amplifier and relay, the starting of feeding means for the grinding wheel or workpiece, which continues until the load current is restored to the predetermined value. In Fig. 1 a potentiometer b, connected in parallel with the series field c of a D.C. motor a driving a grinding machine wheel, provides a voltage, dependent on armature current, which is amplified by a triode v<SP>1</SP> and applied to the gridcathode circuit of a gas-filled triode v<SP>2</SP> in such a manner that when armature current is below a predetermined value valve v<SP>2</SP> is conductive to energize, from an A.C. source, a relay d, contact d<SP>1</SP>, of which closes the circuit of a further relay f, contact f<SP>1</SP> of which completes the circuit of a D.C. motor n producing feed between the grinding wheel and the work until the current of a motor a reaches the predetermined value preset by potentiometer b. In a modification, Fig. 2, (not shown) D.C. motor n is replaced by an electromagnetic step-by-step motor operating a ratchet and pawl feed mechanism. The Provisional Specification describes an alternative relay arrangement for controlling a step-by-step or torque motor adjusting the feed. Rectification of the output of a current transformer associated with an A.C. motor driving the grinding wheel, to provide the contral voltage is referred to.
GB1395548A 1948-05-24 1948-05-24 Improvements relating to grinding machines Expired GB650069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1395548A GB650069A (en) 1948-05-24 1948-05-24 Improvements relating to grinding machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1395548A GB650069A (en) 1948-05-24 1948-05-24 Improvements relating to grinding machines

Publications (1)

Publication Number Publication Date
GB650069A true GB650069A (en) 1951-02-14

Family

ID=10032396

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1395548A Expired GB650069A (en) 1948-05-24 1948-05-24 Improvements relating to grinding machines

Country Status (1)

Country Link
GB (1) GB650069A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1023362B (en) * 1953-08-12 1958-01-23 Fortuna Werke Spezialmaschinen Control for the fully automatic sequence of the processing operations on grinding machines
DE1202388B (en) * 1960-01-27 1965-10-07 Churchill Machine Tool Co Ltd Electric control for a grinding machine
FR2307617A1 (en) * 1975-04-17 1976-11-12 Buderus Eisenwerk METHOD AND DEVICE FOR ADJUSTING THE ADVANCE OF A GRINDING DISK
DE2934066A1 (en) * 1979-08-23 1981-04-09 Gebrüder Hau Maschinenfabrik GmbH & Co, 6050 Offenbach Disc setting control for grinding or polishing machine - uses motor current and disc diameter to obtain regulating signal compared with reference

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1023362B (en) * 1953-08-12 1958-01-23 Fortuna Werke Spezialmaschinen Control for the fully automatic sequence of the processing operations on grinding machines
DE1202388B (en) * 1960-01-27 1965-10-07 Churchill Machine Tool Co Ltd Electric control for a grinding machine
FR2307617A1 (en) * 1975-04-17 1976-11-12 Buderus Eisenwerk METHOD AND DEVICE FOR ADJUSTING THE ADVANCE OF A GRINDING DISK
DE2934066A1 (en) * 1979-08-23 1981-04-09 Gebrüder Hau Maschinenfabrik GmbH & Co, 6050 Offenbach Disc setting control for grinding or polishing machine - uses motor current and disc diameter to obtain regulating signal compared with reference

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