GB1274946A - Grinding machine - Google Patents

Grinding machine

Info

Publication number
GB1274946A
GB1274946A GB5875571A GB5875571A GB1274946A GB 1274946 A GB1274946 A GB 1274946A GB 5875571 A GB5875571 A GB 5875571A GB 5875571 A GB5875571 A GB 5875571A GB 1274946 A GB1274946 A GB 1274946A
Authority
GB
United Kingdom
Prior art keywords
wheel
grinding
workpiece
base
force
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
GB5875571A
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.)
Heald Machine Co
Original Assignee
Heald Machine Co
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 Heald Machine Co filed Critical Heald Machine Co
Publication of GB1274946A publication Critical patent/GB1274946A/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
    • 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

Abstract

1,274,946. Grinding. HEALD MACHINE CO. 24 March, 1969 [1 April, 1968], No. 58755/71. Divided out of 1,274,945. Heading B3D. A grinding machine 10 comprises a base 11, a workhead 12 mounted on the base to support and rotate a workpiece 23, e.g. a ball-bearing race, having a surface of revolution to be finished, a wheelhead 13 mounted on the base and having a rotatable spindle 21 carrying an abrasive wheel 22, and feed apparatus to bring about relative movement of the workhead and wheelhead to introduce the wheel to the workpiece with controlled force for performing a grinding operation to finish the said surface, Means are also provided for monitoring during grinding the relationship between the grinding force (F N ) exerted by the wheel on the workpiece normal to the surface of revolution and the plunge velocity (V) and operative when the ratio of the plunge velocity to the normal force indicative of wheel dullness falls below a certain predetermined value to bring about renewal or dressing of the wheel surface. In the machine shown, the workhead 12 is carried on a table 14 slidable longitudinally of the base 11 under the action of a fluid feed cylinder 19, and is driven by a belt 48 from a motor 47. The wheelhead 13 is carried on a table 16 slidable transversely of the base 11 under the action of a feed cylinder 18 supplied with fluid from a conduit 42. The normal force F N between the wheel and the workpiece is measured from the pressure in conduit 42 by a transducer 46. Alternatively F N is measured by a force transducer such as a proximity pick-up adjacent the spindle 21 which operates an amplifier 56. The plunge velocity V is indicated by an amplifier 41 operated by a velocity transducer comprising a core 38, on table 16, and a fixed coil 39. Electrical circuitry is provided in a main control which compares the ratio # = V/F N with a predetermined value # 0 . When # becomes less than # 0 a signal is generated either to a coil 55 which causes grinding to be interrupted and a tool 29 to dress the wheel 22, or to a coil 45 which opens a valve 44 to permit a pulse of fluid to the cylinder 18 thus urging the wheel 22 against the workpiece to crush-dress it.
GB5875571A 1968-04-01 1969-03-24 Grinding machine Expired GB1274946A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US71785368A 1968-04-01 1968-04-01

Publications (1)

Publication Number Publication Date
GB1274946A true GB1274946A (en) 1972-05-17

Family

ID=24883756

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5875571A Expired GB1274946A (en) 1968-04-01 1969-03-24 Grinding machine
GB1532669A Expired GB1274945A (en) 1968-04-01 1969-03-24 Grinding machine

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB1532669A Expired GB1274945A (en) 1968-04-01 1969-03-24 Grinding machine

Country Status (3)

Country Link
DE (1) DE1916517A1 (en)
FR (1) FR2005307A1 (en)
GB (2) GB1274946A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111633522B (en) * 2020-06-10 2021-05-07 顺德职业技术学院 High accuracy grinder for furniture board

Also Published As

Publication number Publication date
FR2005307A1 (en) 1969-12-12
GB1274945A (en) 1972-05-17
DE1916517A1 (en) 1970-08-27

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Legal Events

Date Code Title Description
49R Reference inserted (sect. 9/1949)
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee