GB1362996A – Machine tools
– Google Patents
GB1362996A – Machine tools
– Google Patents
Machine tools
Info
Publication number
GB1362996A
GB1362996A
GB4366971A
GB4366971A
GB1362996A
GB 1362996 A
GB1362996 A
GB 1362996A
GB 4366971 A
GB4366971 A
GB 4366971A
GB 4366971 A
GB4366971 A
GB 4366971A
GB 1362996 A
GB1362996 A
GB 1362996A
Authority
GB
United Kingdom
Prior art keywords
workpiece
offset
size
gauge
analogue
Prior art date
1970-09-18
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
GB4366971A
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.)
Litton Industries Inc
Original Assignee
Litton Industries Inc
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.)
1970-09-18
Filing date
1971-09-20
Publication date
1974-08-14
1971-09-20
Application filed by Litton Industries Inc
filed
Critical
Litton Industries Inc
1974-08-14
Publication of GB1362996A
publication
Critical
patent/GB1362996A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
B24B49/02—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 according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
B24B49/04—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 according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
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
B24B51/00—Arrangements for automatic control of a series of individual steps in grinding a workpiece
Abstract
1362996 Automatic electric control LITTON INDUSTRIES Inc 20 Sept 1971 [18 Sept 1970] 43669/71 Heading G3N [Also in Division B3] A machine tool comprises means for effecting relative transverse movement to cause machining infeed between a workpiece support 12 and a tool support 29, gauge means 20 adapted to engage portions A….E of a workpiece W to be machined and comprising means 86 for generating a size signal indicative of the size of that portion of a workpiece with which engagement is made, means for providing predetermined signals indicative of the desired sizes for said portions of the workpiece, means for providing individual offset signals for each of said portions, and means responsive to the size signals, predetermined signals and individual offset signals for controlling the means for effecting relative transverse movement of the supports. As described, the machine tool is a grinding machine and the workpiece W has portions A… E of different diameters and is mounted between a headstock 13 and tailstock 14 on a support 12 longitudinally movable along a bed 11 by a hand wheel 15 or a drive under the control of a programmed controller 200 associated with a reader 201 of a punched card, a transducer 18 providing a signal indicative of when the portions of the workpiece are aligned with the grinding wheel 17 and a gauge 20. The gauge is mounted on a base member 21 secured to a table 22 slidable on a slide 23 on a sub-base 24 adjustable to the maximum diameter to be ground. An arm 27 is mounted on a pivot 28 on the member 21 and a further arm 33 is also secured to the pivot and is rockable by a piston-and-cylinder device 30, 31 to move the arm between phantom and solid positions shown in Fig. 3. The end of the arm 27 is joined by a pair of unequal length links 35, 36 to an upper swivel plate 64 connected to a lower swivel plate 63 to which is secured leaf-springs 42, 43, in turn, secured to support members 44 having alignment rods 46 connected to lugs 48 on the sides of a transducer housing 40 bolted to a chordal type caliper 26. The face of the gauge has shoes 80….83 at its outer edges and centre shoes 84, 85 which project slightly more than the outer shoes. The outer shoes are used for checking the longitudinal position of the workpiece by contacting the shoulder of a larger diameter portion of the workpiece and the centre shoes position a probe 86 of the transducer 40. The electronic circuit comprises the programme sequence controller 200, Fig.8, which produces a plurality of enable signals coupled by wiring 204 to the card reader 201. The latter produces output digital signals and is coupled to an analogue converter 202 connected to a summing network 203 which also receives analogue signals from the gauge 20 and has its output connected to a coarse meter 213. The signal from the coarse meter 213 on an output wiring 215 indicates whether or not the portion of the workpiece engaged by the probe is within rough size tolerance and thus qualify to be ground. The coarse meter 213 also has an output connected to a fine meter 217 which indicates when the portion of the workpiece engaged by the gauge has reached its final size. The converter 202 also receives signals from an analogue size offset 220 connected to a second digital to analogue converter 223 connected through wiring 232 and isolating diodes 233 to thumbwheel switches 230, each having a plurality of contacts passing enabling signals, and individual leads 225….229 to the controller 200. Each switch 230 individually establishes a particular offset for a respective portion of the workpiece. A number of switches 234 are connected between the leads 225….229 and converter 223 which, when closed, may provide a programmed negative offset signal instead of a programmed positive signal. The circuit of the analogue size offset circuit includes two arms each comprising a plurality of series connected resistances and connected to voltage sources of opposite polarity; the resistances of the two arms can be simultaneously added and subtracted while the total resistance remains unchanged to determine the amount of offset. In operation, a programmed card is placed in the card reader 201, the switches 234 are open, and the thumbwheel switches 230 are set to a low value so that there is zero output from the digital to analogue converter 223. The analogue size offset 220 is adjusted to have an output which is supplied to the converter 202 to provide a predetermined offset which will produce a given oversize for each of the portions of the workpiece, say 0À005″. The common offset may be modified by adjustment of analogue size offset. With the workpiece in the machine, the carriage is automatically moved to position the portion A in alignment with the grinding wheel and the gauge mechanism is moved by a piston-and-cylinder device (51), (52), Fig.7 (not shown) moving the slide 23 to position the gauge in alignment with the side of the grinding wheel adjacent the shoulder of a larger diameter portion of the workpiece. Fluid-pressure is directed to the cylinder 31 to rock the arms 27, 33 to position the gauge adjacent the workpiece and then to a cylinder 38 having a rod 37 connected to link 35 so that the calipers 26 engage the workpiece and the probe 86 determines whether the unground portion is of a size which qualifies for grinding by comparing the unground portion with a pre-set dimension of a card in the reader 201 as modified by the offset signal provided from the analogue size offset 220 to the converter 202. The output from the summing network 203 is supplied to the meter 213 to determine if the workpiece is to be ground. If the size is acceptable, the wheelhead is advanced and the gauge is moved from the shoulder of the workpiece. During grinding, the probe sends a continuous signal corresponding to the workpiece size which is summed in the network with the signal from the card reader 201 or manual dial switches 111, the grinding progress being indicated on the meters 213, 217. The gauge controls the feed of the wheel to permit a spark-out to final size. The process is repeated for each of the portions A to E. Each portion should be oversize by the amount determined by the setting of the analogue size offset circuit. Any variation which may be caused by flexing of the workpiece is corrected by adjustment of the thumbwheels 230 in conjunction with the switches 234 to vary the output of the analogue size offset 220.
GB4366971A
1970-09-18
1971-09-20
Machine tools
Expired
GB1362996A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US7333170A
1970-09-18
1970-09-18
Publications (1)
Publication Number
Publication Date
GB1362996A
true
GB1362996A
(en)
1974-08-14
Family
ID=22113099
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB4366971A
Expired
GB1362996A
(en)
1970-09-18
1971-09-20
Machine tools
Country Status (5)
Country
Link
US
(1)
US3694970A
(en)
CA
(1)
CA965173A
(en)
DE
(1)
DE2146360A1
(en)
FR
(1)
FR2107762A5
(en)
GB
(1)
GB1362996A
(en)
Cited By (6)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO1997012724A1
(en)
*
1995-10-03
1997-04-10
Marposs Societa’ Per Azioni
Apparatus for checking the diameter of crankpins rotating with an orbital motion
US8336224B2
(en)
2009-09-22
2012-12-25
Hommel-Etamic Gmbh
Measuring device
US8429829B2
(en)
2010-03-26
2013-04-30
Hommel-Etamic Gmbh
Measuring device
US8725446B2
(en)
2009-07-08
2014-05-13
Hommel-Etamic Gmbh
Method for determining the shape of a workpiece
US9393663B2
(en)
2010-08-23
2016-07-19
Hommel-Etamic Gmbh
Measuring device
US9562756B2
(en)
2012-09-20
2017-02-07
Jenoptik Industrial Metrology Germany Gmbh
Measuring device with calibration
Families Citing this family (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB1383242A
(en)
*
1971-01-20
1975-02-05
Possati M Apperecci Elettronic
Apparatus for measuring the speed of removal of swarf in a grinding machine
US3807098A
(en)
*
1972-06-14
1974-04-30
Sundstrand Syracuse
Plural grinding stations with master controller
US3986305A
(en)
*
1972-09-07
1976-10-19
Maag Gear-Wheel & Machine Company Limited
Method of grinding of gear teeth
US3824743A
(en)
*
1973-05-22
1974-07-23
Landis Tool Co
Machine tool control system
DE2329055C3
(en)
*
1973-06-07
1984-08-09
Schaudt Maschinenbau Gmbh, 7000 Stuttgart
Method for grinding workpieces on a grinding machine
DE2551454C2
(en)
*
1975-11-15
1985-02-07
Philips Patentverwaltung Gmbh, 2000 Hamburg
Device for inserting profiles into rod-shaped or tubular material
JPS5392994A
(en)
*
1977-01-27
1978-08-15
Nippon Chemical Ind
Nonnspheruial lens creating device
US4456516A
(en)
*
1983-05-12
1984-06-26
Westinghouse Electric Corp.
Shaft rounding apparatus
US4790545A
(en)
*
1988-01-11
1988-12-13
Bryant Grinder Corporation
Workpart centering mechanism for a chuck
DE19857364A1
(en)
*
1998-12-11
2000-06-29
Junker Erwin Maschf Gmbh
Process and grinding machine for process control when peeling a workpiece
US7694583B2
(en)
*
2005-05-05
2010-04-13
Control Gaging, Inc.
Gripper gage assembly
Family Cites Families (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3157971A
(en)
*
1963-02-07
1964-11-24
Landis Tool Co
Size control device adaptable to different diameters
US3466976A
(en)
*
1966-09-16
1969-09-16
Land Tool Co
Feed mechanism for grinding machine
US3557495A
(en)
*
1968-04-17
1971-01-26
Litton Industries Inc
Positioning mechanism for machine tool
1970
1970-09-18
US
US73331A
patent/US3694970A/en
not_active
Expired – Lifetime
1971
1971-08-12
CA
CA120,454A
patent/CA965173A/en
not_active
Expired
1971-09-16
FR
FR7133441A
patent/FR2107762A5/fr
not_active
Expired
1971-09-16
DE
DE19712146360
patent/DE2146360A1/en
active
Pending
1971-09-20
GB
GB4366971A
patent/GB1362996A/en
not_active
Expired
Cited By (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO1997012724A1
(en)
*
1995-10-03
1997-04-10
Marposs Societa’ Per Azioni
Apparatus for checking the diameter of crankpins rotating with an orbital motion
US6067721A
(en)
*
1995-10-03
2000-05-30
Marposs Societa’ Per Azioni
Apparatus for checking the diameter of crankpins rotating with an orbital motion
US6298571B1
(en)
1995-10-03
2001-10-09
Marpos Societa’ Per Azioni
Apparatus for checking diametral dimensions of rotating cylindrical parts
US7954253B2
(en)
1995-10-03
2011-06-07
Marposs Societa’ Per Azioni
Apparatus for checking diametral dimensions of a rotating cylindrical part during a grinding thereof
US8286361B2
(en)
1995-10-03
2012-10-16
Marposs Societa’ Per Azioni
Apparatus for checking diametral dimensions of a cylindrical part in orbital motion in a numerical control grinding machine
US8667700B2
(en)
1995-10-03
2014-03-11
Marposs Societa’ Per Azioni
Method for checking the diameter of a cylindrical part in orbital motion
US8725446B2
(en)
2009-07-08
2014-05-13
Hommel-Etamic Gmbh
Method for determining the shape of a workpiece
US8336224B2
(en)
2009-09-22
2012-12-25
Hommel-Etamic Gmbh
Measuring device
US8429829B2
(en)
2010-03-26
2013-04-30
Hommel-Etamic Gmbh
Measuring device
US9393663B2
(en)
2010-08-23
2016-07-19
Hommel-Etamic Gmbh
Measuring device
US9562756B2
(en)
2012-09-20
2017-02-07
Jenoptik Industrial Metrology Germany Gmbh
Measuring device with calibration
Also Published As
Publication number
Publication date
US3694970A
(en)
1972-10-03
FR2107762A5
(en)
1972-05-05
CA965173A
(en)
1975-03-25
DE2146360A1
(en)
1972-03-30
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Legal Events
Date
Code
Title
Description
1974-12-27
PS
Patent sealed [section 19, patents act 1949]
1985-05-22
PCNP
Patent ceased through non-payment of renewal fee
