GB694258A - Improvements relating to grinding machines - Google Patents

Improvements relating to grinding machines

Info

Publication number
GB694258A
GB694258A GB961551A GB961551A GB694258A GB 694258 A GB694258 A GB 694258A GB 961551 A GB961551 A GB 961551A GB 961551 A GB961551 A GB 961551A GB 694258 A GB694258 A GB 694258A
Authority
GB
United Kingdom
Prior art keywords
grinding
workpiece
relay
delay
predetermined value
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
GB961551A
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 GB961551A priority Critical patent/GB694258A/en
Publication of GB694258A publication Critical patent/GB694258A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/26—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using discharge tubes
    • 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)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Abstract

694,258. Automatic current control systems. CHURCHILL MACHINE TOOL CO., Ltd. March 27, 1952 [April 25, 1951], No. 9615/51. Addition to 650,069. Drawings to Specification. Class 38 (iv). [Also in Group XXIII] In a precision grinding machine in which fall of 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 the workpiece which continues until the load current is restored to the predetermined value as in the parent Specification, delay is included so that if the grinding-wheel motor current rises again within a predetermined time, e.g. due to eccentricity of the workpiece, the feed will not take place. Delay is effected either by a synchronous motor operating a contact or by a resistance-condenser circuit energizing a relay.
GB961551A 1951-04-25 1951-04-25 Improvements relating to grinding machines Expired GB694258A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB961551A GB694258A (en) 1951-04-25 1951-04-25 Improvements relating to grinding machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB961551A GB694258A (en) 1951-04-25 1951-04-25 Improvements relating to grinding machines

Publications (1)

Publication Number Publication Date
GB694258A true GB694258A (en) 1953-07-15

Family

ID=9875400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB961551A Expired GB694258A (en) 1951-04-25 1951-04-25 Improvements relating to grinding machines

Country Status (1)

Country Link
GB (1) GB694258A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1202388B (en) * 1960-01-27 1965-10-07 Churchill Machine Tool Co Ltd Electric control for a grinding machine
CN102059653A (en) * 2010-07-20 2011-05-18 上海交通大学 Self-adaptive control method of spherical numerical-control precision grinding process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1202388B (en) * 1960-01-27 1965-10-07 Churchill Machine Tool Co Ltd Electric control for a grinding machine
CN102059653A (en) * 2010-07-20 2011-05-18 上海交通大学 Self-adaptive control method of spherical numerical-control precision grinding process
CN102059653B (en) * 2010-07-20 2012-10-31 上海交通大学 Self-adaptive control method of spherical numerical-control precision grinding process

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