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Publication numberUS3653161 A
Publication typeGrant
Publication dateApr 4, 1972
Filing dateJan 25, 1971
Priority dateJan 25, 1971
Publication numberUS 3653161 A, US 3653161A, US-A-3653161, US3653161 A, US3653161A
InventorsStephen C Clark Jr
Original AssigneeIngersoll Milling Machine Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Method and apparatus for turning workpieces and utilizing programmed data
US 3653161 A
Abstract
Disclosed here are methods and automatic apparatus for grinding cylindrical workpieces, such as the contoured rolls used in metal rolling mills. The methods and apparatus involve (1) automatic finding of the lengthwise center of rolls of different and undetermined lengths so as to establish a reference position for the execution of a numerically programmed path defined relative to the center of a roll as a point of symmetry, (2) the storage of the successive instructions of multi-axis movements making up a numerically defined profile or contoured path, and the use of those instructions repeatedly and in whole or in part as called for by different ones of a sequence of commands read from storage and executed in succession, (3) the automatic alignment of the roll axis parallel to the longitudinal axis of motion in a grinding machine by pivoting of one end of the roll about the other until the sensed difference in positions of the roll surface, along an axis transverse to the longitudinal axis and at locations near opposite ends of the roll, is changed to a predetermined fraction of the originally sensed difference, (4) the initiation of grinding passes from that end of a roll which is largest in diameter, so as to avoid "digging in" or increasing the depth of wheel bite as the wheel moves lengthwise of the roll, (5) the execution of continuous passes of the grinding wheel with pre-programmed values of feed rate, wheel speed, roll speed, continuous infeed and incremental infeed until a pre-programmed thickness of material has been removed from the roll surface, and (6) the grinding down of a roll until it is reduced to a diameter equal that of a previously ground roll of a matched pair. These functions are all obtained by the calling out and execution of pre-established routines in response to the reading from storage of pre-programmed sequence commands, so that in the disclosed method and apparatus there is an automatic progression from each type of operation to the next, and with the following of numerically defined profile whenever it is required.
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Description  (OCR text may contain errors)

United States Patent Clark, Jr.

|54| METHOD AND APPARATUS FOR TURNING WORKPIECES AND UTILIZING PROGRAMMED DATA [72] Inventor: Stephen C. Clark, Jr., Phoenixville, Pa.

[73] Assignee: The lngersoll Milling Machine Company,

Rockford, Ill.

[22] Filed: Jan. 25, 1971 i [21] Appl. No.: 109,522

Related US. Application Data [62] Division of Ser. No. 790,323, Jan. 10, 1969.

[52] U.S.Cl. ..5l/165 TP,51/49, 51/289 R,

318/569 [51] Int. Cl ..B24b 5/04 [58] Field ofSearch ..5l/49, 165 R, 165 TP, 165.71,

5l/l65.74, 165.75, 165.76, 165.77, 289 R, 326, 327; 82/14 B, 14 D, 21 B; 318/569, 570, 571

Primary Examiner-Lester M. Swingle Attorney-Wolfe, Hubbard, Leydig, Voit & Osann, Ltd.

[451 Apr. 4, 1972 [57] ABSTRACT Disclosed here are methods and automatic apparatus for grinding cylindrical workpieces, such as the contoured rolls used in metal rolling mills. The methods and apparatus involve (l) automatic finding of the lengthwise center of rolls of different and undetermined lengths so as to establish a reference position for the execution of a numerically programmed path defined relative to the center of a roll as a point of symmetry, (2) the storage of the successive instructions of ulti-axis movements making up a numerically defined profile or contoured path, and the use of those instructions repeatedly and in whole or in part as called for by different ones of a sequence of commands read from storage and executed in succession, (3) the automatic alignment of the roll axis parallel to the iongitudinal axis of motion in a grinding machine by pivoting of one end of the roll about the other until the sensed difference in positions of the roll surface, along an axis transverse to the longitudinal axis and at locations near opposite ends of the roll, is changed to a predetermined fraction of the originally sensed difference, (4) the initiation of grinding passes from that end of a roll which is largest in diameter, so as to avoid digging in or increasing the depth of wheel bite as the wheel moves lengthwise of the roll, (5) the execution of continuous passes of the grinding wheel with pre-programmed values of feed rate, wheel speed, roll speed, continuous infeed and incremental infeed until a pre-programmed thickness of material has been removed from the roll surface, and (6) the grinding down of a roll until it is reduced to a diameter equal that of a previously ground roll of a matched pair. These functions are all obtained by the calling out and execution of preestablished routines in response to the reading from storage of pre-programmed sequence commands, so that in the disclosed method and apparatus there is an automatic progression from each type of operation to the next, and with the following of numerically defined profile whenever it is required.

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SHEET 080? 18 H SIGNAL Ufr m H m 05 1M, K 33.0000 PIC-L68 C1040 WM 159 5% WT GATES @1 PRESET GATES was jl 1% @{DRESET GATES] 9 IIBQ- E V C I DIRE I 331 u BIDIRECTIONAL SENSOR AM IL PULSER IN DOWN COUNTER '70 m ZERO W o FIG (5F 9 252 O READOUT GATES] si GrQAL @+'p s @M] 29130 15 it L190 ,IN FIGIO I85 JU OUT DIRECTION uP bm ggcno L, SENSER M IL g, p s R- 'IN OWN COUNTEK READOUT GQTES] QJ'REKTE/QTO 9 6fepher1 Clc/qr/f dn @MrQAA/M VJ? M @TTOR/QLY/ METHOD AND APPARATUS F OR TURNING BACKGROUND OF THE INVENTION WORKPIECES AND UTILIZING PROGRAMME!) DATA The present invention relates in general to methods and apparatus for the machining of workpieces, and while it will find TAB LE OF CONTENTS advantageous use in the operation of various machine tools,

l the invention is adapted to be applied with special advantages i g gfthe D P in the operation of grinding machines for shaping or renewing gggi g zgzg i i i izs g the shape of rolls such as those employed in metal rolling I a a i I a I s I 1 I Summary i 2 10 In the operation of large installations for the rolling of steel Brief Description of the Drawings 3 or aluminum into thin Sheets or Strips for comng, the high Descnpnon of Preferred ,Embodlments 4 inter-roll pressures and roll speeds result in severe wear of the An Exqmplally -P? -l'v 'q" 4 surfaces of the individual rolls. The wear is often non-uniform, (39mm! lnstrumemahnes on the Grmdmg and any roll surface irregularities result in magnified surface gi 'g g 2 5 imperfections in the sheets or strips. It is common practice to 7 change the rolls in a given mill stand frequently, as often as S yres .ervomotor once per eight hour shift. When each worn roll is removed iggg igggfi fifs g i from the mill, there is a need to have its surface re-finished or prox'imity re-ground to nearly perfect smoothness and with the desired C L Control system cylindrical shape (which may be a convex or concave contour Contouringpp 10 lengthwise of the roll to compensate for roll loading pressure Sequence Command 13 and produce a desired cross sectional shape in the rolled D, M I A y 14 strip). To keep a large mill, and the investment which it D gg zggigggi g l 5 represents, operating efficiently, it is desirable to re-grind l 1. Setup Procedure 16 wom mus not only quickly so that they may be returned to service, but also with precision. Location of Lengthwise Camel-7M6] 18 The increasiii 1 severe shorta e of skilled machinists leads (a) Movement of the Swivel Base to the Center g y g to the result that manual control of grinding machines offers OfB.AXIS Travel little p p f fy g the current demand for pi and (b) sctfmg the Platform 35 to the Center of X precise grinding of rolls. The present invention aims to over- AXIS Travel come that if y y making g g operaions (C) W W?" of Proxlmny Swltches to Opera stantially fully automatic through the use of pre-calculated, tlve Positions Pr g a m a a of t ki d i p fi e at efine (d) Movementflfwhedto Cememf B 20 the contour of the finished roll surface, and sequence com- Auwmanc Ahgmflem of the AXIS 24 Y mands which call for the execution of different routines in suc- (a) Startup Operations 24 cession, and with preselected operating parameters The need (b) Movement to Locatlon of Flrst Gagmg Band 26 for a machinist of extreme skill is thus obviated and the speed (c) Bringing the Wheel into Touching Contact w h th R0 28 with which any roll can be completely reground is increased (d) Grinding Right Gage Band to predetermined beyond that attainable by even the most skilled operator.

Depth 28 SUMMARY OF THE INVENTION (e) Movement of Wheel to Location of Left Gage Band 29 A pmlcpal P l F" Pmvde ,melhods (f) Grinding of the Left Gaging Band 30 and apparatus tor the machining of workpieces to desired con- (g) Retraction of the Wheel Free of the Roll 30 P and by smcessmn "f' 0 Sensing the Location of the Left G aging Band ried out automatically in sequence, and all defined in advance on the Rear Side of the R011 31 by Programmed l is 9 Determining Direction of First Gn-nding Pass program of success ve instructions defining successive multimH-G rindiiig: .I:T..TI. .TTT. 37 am movements which make? up a i (a) Right End Larger H U u and which may be followed in the machining of a plurality of (b) Left End Larger .I.....II.II 39 "F W have Same l P and (c) m of the System Prior to First Grinding con unction with such a profile program, to utilize a program Pass 4o l P i ((0 First Grinding Pass and Continuous Passing" piece or a group of identical workpieces so as to br ng about (i) Case I -Material Removal Incomplete 42 3 i; z i of 2 5 22 opegnons mcluimg a mgou n using orap r o eproieprogramw en 5 g gf gg Rem9lcomplete" that is required in the machining of the workpiece. Finish Grinding 45 It is another object of the invention to facilitate the use of Sensing and 46 the same program of profile data in the shaping of surfaces of 8. Cleaning p the R0 Surface y a plurality cylindrical workpieces such that the surface con- Passes' 50 tours are symmetrical about the lengthwise centers of the 9. polishinpgsggs. 52 workpteces, even though the Exact length of any particular -g a Second one of the workpieces is not known or measured and the axial An Alternative Embodiment placement of the workpiece in a numerically controlled grinding machine is not determined by a painstaking and time-consuming setup procedure.

in a more specific sense, it is an object of the invention to eliminate the need for a long and detailed numerical program to be prepared (and represented on an individual punched tape, according to current practice) for each individual specific workpiece in a series of workpieces which are to have the same final profile but which are to be made with different CROSS-REFERENCE To A RELATED APPLICATION final sizes (e.g., lengths or diameters), and a related object is This application is a division of my copending application, to provide methods and apparatus by which (a) a single profile Ser. No. 790,323, filed Jan. 10, 1969. program of numerical instructions is used with any one of a

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3007096 *Sep 11, 1957Oct 31, 1961Inductosyn CorpTwo or three dimensional digital machine tool control
US3056240 *Sep 1, 1960Oct 2, 1962Cincinnati Milling Machine CoAutomatic grinding machine
US3088250 *Oct 18, 1961May 7, 1963Farrel Birmingham Co IncAutomated roll grinder
US3391497 *Nov 17, 1964Jul 9, 1968Farrel CorpRoll grinding and gaging apparatus
US3422583 *Apr 18, 1966Jan 21, 1969Cincinnati Milling Machine CoMethod for positioning a roll on a roll grinder
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3916571 *Dec 27, 1972Nov 4, 1975Babcock & Wilcox CoCam controlled machine tools with contour compensator
US4061952 *Apr 14, 1975Dec 6, 1977Cranfield Institute Of TechnologyComputer-controlled machine tool
US4766700 *Dec 18, 1985Aug 30, 1988Fortuna-Werke Maschinenfabrik Gesellschaft Mit Beschrankter HaftungMethod and apparatus for determining the position of a workpiece in an NC-controlled machine
US6976900 *Mar 5, 2004Dec 20, 2005United States Steel Corp.Automatic roll data acquisition system
US8029338Mar 8, 2004Oct 4, 2011Diamond Innovations, Inc.Grinding wheel for roll grinding application and method of roll grinding thereof
US8070556 *Sep 25, 2008Dec 6, 2011Diamond Innovations, Inc.Grinding wheel for roll grinding and method of roll grinding
USB318745 *Dec 27, 1972Jan 28, 1975 Title not available
Classifications
U.S. Classification451/4, 451/49, 451/14, 451/142, 318/569, 451/46, 451/9
International ClassificationB24B49/00
Cooperative ClassificationB24B49/00
European ClassificationB24B49/00