US3886693A - Grinding machine for machining polygonal workpieces - Google Patents

Grinding machine for machining polygonal workpieces Download PDF

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Publication number
US3886693A
US3886693A US459378A US45937874A US3886693A US 3886693 A US3886693 A US 3886693A US 459378 A US459378 A US 459378A US 45937874 A US45937874 A US 45937874A US 3886693 A US3886693 A US 3886693A
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United States
Prior art keywords
axis
workpiece
grinding
rotation
rotating
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Expired - Lifetime
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US459378A
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English (en)
Inventor
Jozsef Tajnafoi
Karoly Gellert
Karoly Hidasi
Gribovszki
Sandor Vekony
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Nehezipari Muszaki Egyetem
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Nehezipari Muszaki Egyetem
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H35/00—Gearings or mechanisms with other special functional features
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q27/00—Geometrical mechanisms for the production of work of particular shapes, not fully provided for in another subclass
    • B23Q27/006—Geometrical mechanisms for the production of work of particular shapes, not fully provided for in another subclass by rolling without slippage two bodies of particular shape relative to each other
    • 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
    • B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
    • B24B19/08—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding non-circular cross-sections, e.g. shafts of elliptical or polygonal cross-section
    • 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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
    • B24B5/14—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding conical surfaces, e.g. of centres
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S451/00—Abrading
    • Y10S451/919—Wankel

Definitions

  • the workpiece to be ground is rotated about its axis
  • a grinding tool is rotated about its own axis which is parallel with the workpiece axis and which is stationary or alternatingly rotating
  • the axis of the workpiece is rotated around the periphery of a cylinder of rotation whose axis is parallel with the workpiece axis at an r.p.m. practically equal to the r.p.m. of the workpiece about its own axis multiplied by the number of sides of the polygon and the ratio of the angular velocities of the first two above-mentioned rotations is periodically changed.
  • the invention concerns a grinding machine whereby diverse polygonal workpiece may be ground in a manner similar to convention roll grinding and internal grinding.
  • the major part of the obstacles has hitherto been the absence of a process and apparatus enabling the efficient, sufficiently accurate and economic production of a polygonal workpiece ground both externally and internally in a way similar to e.g. a shaft produced on a traditional machine tool.
  • a difficulty is caused also by the use of elliptical motion in place of planetary motion in order to eliminate errors stemming from changes in diameter of the grinding disc.
  • the motion is obtained by the superposition of two mutally perpendicular linear components of movement.
  • This motion may be generated e.g. by means of an eccentric, wherein the horizontal component of the eccentric movement is transmitted to the rotary shaft of the grinding disc by a push rod and the vertical component by a two-armed lever.
  • the lever arm ratio of the two-armed lever is adjustable, which makes it possible to change the circular motion into a movement along an elliptical path.
  • the transmission to the grinding disc of the two components of movement set the requirement on the grinding disc that it should be journalled in a complicated system of positive constraints made up of the following parts: i
  • the grinding shaft is journalled in main bearings.
  • the main bearings are displaceable in vertical, linear guides.
  • the linear guides are carried by a body which is displaceable in horizontal guides.
  • the horizontal guides are formed in a grinding slide which can be regarded as rigid enough.
  • the large-mass grinding disc rotating at about 3000 r.p.m. moves in a serially connected, weak constraint system, with a period corresponding to the number of sides of the polygon, for each rotation of the workpiece. This circumstance leads to the creation of large dynamic forces.
  • Some of the known processes and grinding machines also suffer from the fault that wear of the grinding disc greatly influences the trueness of shape and dimensional accuracy of the workpiece produce, and neither the auxiliary movements in the directions of feed and rotation, nor the main machining movement always be set to the optimum value.
  • the invention seeks to provide a grinding machine for the machining of polygonal workpieces by means of which both the external and the internal surfaces of workpieces can be finish-machined with a dimensional accuracy equal to that of traditional grinding processes; the workpieces belonging together and pushed into each other have external and internal surfaces which fit to togetherer along practically the whole of their circumference, during machining the generated dynamic forces are smaller by an order of magnitude than those in known solutions, the change-over from one polygonal shape to another of different dimensions and configuration can be effected quickly and easily, wear of the grinding disc has practically no influence on the trueness of shape and on dimensional accuracy, the auxiliary movements in the directions of feed and cut, as well as main machining movement may be optimised for the machining requirements at all times, furthermore the machine or construction used for grinding has few components, is not liable to breakdown, is rigid, and in addition affords the possibility of fitting ground workpieces to workpieces of a given polygonal shape fabricated by another process, by virtue of the fact that a polygonal profile character
  • the task set is solved by rotating the workpiece to be ground about its own axis which is parallel with the axis of a grinding disc or ring which has either a stationary axis or an alternatingly moving axis, and at the same time the axis of the workpiece is rotated along the periphery of a cylinder of rotation with an axis parallel with axis of the workpiece, the number of revolutions being equal to the number of revolutions of the workpiece about its own axis multiplied by the number of sides of polygon, and the ratio of angular velocities of the former fundamental motions is periodically changed.
  • a further characteristic is that in the course of machining the internal surfaces, the shaft of the stone carrying out the machining and rotating about its own axis is displaced together with an arm performing an angular or linear movement about the axis of the grinding disc or ring carrying out the machining of the external surfaces, and the distance between the stationary shaft of the grinding disc or ring operating on the outer mantle and the point on the periphery of the stone farthest or nearest to the shaft is kept equal to the radius of the grinding disc or ring operating on the outer surface.
  • a further characteristic of the invention is that in the course of machining both half-sections of each side of the polygonal workpiece, from the starting point of a half-section the angular velocity of the planetary movement of the workpiece is continuously changed to a maximum value, then by changing the sign of the change of angular velocity the change in angular displacement stemming from the change in angular velocity is continuously reduced to the end of the halfsection.
  • Another characteristic of the invention is that during machining the workpiece is rotated about its own axis and the shaft of the workpiece is rotated in the same or in the opposite direction along the periphery of the cylinder of rotation.
  • the grinding machine according to the invention is characterized in that it has: a main spindle rotating about an axis parallel with the axis of a tool, e.g. a grinding disc or ring, rotating about a stationary axis, an axially adjustable tailstock spindle parallel and rotating synchronously with the main spindle, a respective centre in the main spindle and in the tailstock spindle, which centres are either of constant eccentricity and exchangeable or are of adjustable eccentricity, a driving device for the workpiece mounted between the centres, further, it has between the driving device and the main spindle a transmission for effecting a positive rotational coupling, with a transmission ratio equal to the number of the polygon, i.e. the number of sides of the workpiece, and in the kinematic chain of the gear mechanism, in the sections of the translational circular movement belonging with the polygonal sides, there is a correcting mechanism which periodically changes the angular velocity.
  • a main spindle rotating about an axis parallel with the axi
  • a further characteristic of the grinding machine according to the invention is that it has an arm angularly displaceable about the axis of the tool e.g. a grinding disc or ring for machining the outer surface of the workpiece which arm forms part of the mechanism for keeping the rotating tool, e.g. the bore stone, for machining the internal surfaces in oscillating motion along a predetermined circular arc, a slide on the arm freely displaceable along the length of the arm, and a second arm which can be rotated about one of its ends that is at the axis of the cylinder of rotation described by the axis of the workpiece, while the other end is secured to the slide so as to be rotatable about the centre point of the latter.
  • an arm angularly displaceable about the axis of the tool e.g. a grinding disc or ring for machining the outer surface of the workpiece which arm forms part of the mechanism for keeping the rotating tool, e.g. the bore stone, for machining the internal surfaces in oscillating motion along a
  • a further characteristic of the grinding machine according to the invention is that it has an arm displaceable perpendicularly to the axis of the workpiece and parallel with the plane covered by the tool, e.g. pottery stone, grinding disc or grinding ring, for machining the outer surface of the workpiece, which arm forms part of the mechanism for keeping the tool, e.g.
  • the tool e.g. pottery stone, grinding disc or grinding ring
  • the bore stone which rotates about its own axis, and which is for machining the internal surfaces, in oscillating motion about a predetermined linear path; and it has on said arm a slide supporting a further arm, the slide being freely displaceable along the length of the first arm, the further arm beng pivotable about the centre point of the slide, and the second arm is rotatable about its other end falling on the axis of rotation described by the axis of the workpiece.
  • a further characteristic of the grinding machine according to the invention is that it has two forks secured in parallel on the shaft of the tool for machining the outer surfaces, the forks forming part of the mechanism for maintaining the bore stone for machining the internal surfaces in oscillation along a predetermined circular arc, and it has a mandrel projecting into the recess of one of the forks and secured eccentrically on the tail spindle, and further it has a spindle displaceable in the recess of the other fork and holding the bore stone for machining the internal surfaces of the workpiece.
  • a further characteristic of the grinding machine according to the invention is that is has a tapped spindle for moving the spindle holding the bore stone along the length of the recess of the fork, and a tapped profile coupled to the tapped spindle, and it has a dog clutch for interrupting the positive coupling in the transmission for effecting the rotational positive coupling between the driving device and the eccentric centre.
  • a further characteristic of the grinding machine according to the invention is that it has, in the transmission which brings about the positive rotational coupling between the drive mechanism and the eccentric centre, a correcting device which has an eccentric journalled in a disc; further, the eccentric has an end projecting into a recess in a disc secured for rotation with a shaft which transmits rotation, via gear wheels, to the main spindle supporting the centre; at the other end of the eccentric there is an arm which is always in contact with the surface of the correcting body; and further, the machine has a threaded spindle for displacing the correcting body along the length of the tubular shaft rotatable in an internal thread in the correcting body and by virtue of that rotation capable of carrying the disc in which the eccentric is journalled.
  • a further characteristic of the grinding machine according to the invention is that it has in the correcting mechanism, a ring radially deformable by shoes which can be set by screws in any desired angular position relative to a rigid ring which is concentric with a shaft having the same r.p.m.
  • a disc in the bore of the deformable ring a disc is secured for rotation with a tubular shaft; an arm rotatable about a pin journalled in the disc; on one end of the arm there is a feeler urged into permanent contact with the surface of the bore of the ring by a spring; further, it has an arm portion which bears against a stop which projects from the other end of the arm and is adjustable by means of a tapped spindle on the disc rotating with the shaft.
  • a further characteristic of the grinding machine according to the invention is that it has in the correcting mechanism, a helical gear wheel which is mounted displaceably on and for rotation with the shaft for transmitting rotation to the main spindle carrying the eccentric centre, the gear wheel being biased in one direction by a spring; another helical, driving gear wheel meshing with the first gear wheel; a push rod guided in the casting of the main spindle housing and supported by a thrust bearing on the side of the axially displaceable gear which is opposite to the spring; and a ring which is rigidly secured to two diametrically opposite points of the disc secured on and for rotation with, the shaft, the remaining point of the ring being axially deformable by shoes which can be adjusted by screws in any angular position relative to the disc, the ring being in permanent contact with a roller mounted in the push rod and serving as a track for the movement of the roller.
  • a further characteristic of the grinding machine according to the invention is that it has epicyclic gearing in the correcting mechanism within the transmission bringing about the positive rotational coupling between the main spindle supporting the eccentric centre and the workpiece-driving mechanism, the epicyclic gearing being between the shaft rotating at the rpm. of the main spindle and a tubular shaft concentric with the first shaft and being tiltable about the shaft; and it has a roller rotatable on a shaft projecting from the casing of the epicylcic gearing; further, it has an arm of variable rotational axis one end of which is supported by the roller while the other end bears against the correcting body which is secured on the shaft for rotation therewith.
  • a further characteristic of the grinding machine according to the invention is that it has, in addition, an oblique bore formed in a body secured to the end of the main spindle, a centre with a cylindrical shaft journalled in the bore, and a push rod which is coupled to the internal end of the shank of the centre and which is displaceable along the axial direction of the main spindle.
  • FIG. 1 is a diagrammatic illustration of the principle of the preferred grinding machine for carrying out the process according to the invention.
  • FIG. 2 shows an embodiment of the grinding machine similar to that of FIG. 1, but with the difference that the axis of the workpiece rotates along the cylinder of rotation oppositely to the workpiece.
  • FIG. 3 is an exemplary scheme of a grinding machine according to the invention wherein machining of the external surface of the workpiece is carried out by a grinding ring, and the workpiece and its axis rotate in the same direction.
  • FIG. 4 shows an embodiment similar to that of FIG. 3, with the difference that here the workpiece axis and the workpiece rotate in opposite directions.
  • FIG. 5 is a view parly in elevation and partly in section of an exemplary mechanism for use in practising the scheme shown in FIGS. 1 and 2.
  • FIG. 6 is a view from another direction of the mechanism shown in FIG. 5.
  • FIG. 7 is a view of one of the forks of the mechanism shown in FIG. 5.
  • FIG. 8 is a view of the other form of the mechanism shown in FIG. 5.
  • FIG. 9 is a schematic view of a centre of continuously adjustable eccentricity.
  • FIG. 10 is a part-elevation, part-section of a driving mechanism of a construction different from that shown in FIG. 9 and being of a slotted link or fork type.
  • FIG. 11 is a diagram illustrating the possible profile changes in the case of a triangular shape.
  • FIG. 12 is qualitative diagram illustrating, for a triangular shape, the changes in the maximum difference t, in the normal direction between the profiles produced with a tool of infinite radius and with a tool of finite radius R
  • FIG. 13 shows an exemplary embodiment of a grinding machine according to the invention wherein the arm carrying the spindle of the bore stone in the case of R 00 performes linear harmonic motion, and the direction of rotation of the workpiece is the same as the direction of rotation of the workpiece axis along the cylinder of rotation.
  • FIG. 14 shows an embodiment similar to that of FIG. 13, with the difference that the direction of rotation of the workpiece is opposite to the direction of rotation of the workpiece axis along the cylinder of rotation.
  • FIG. 15 shows a scheme for an exemplary embodiment of the mechanism suitable for guiding the arm supporting the bore stone.
  • FIG. 16 shows a schematic variant of the mechanism of FIG. 15, using forks.
  • FIG. 17 is a scheme usable for grinding conical bores and is similar to the mechanism shown in FIG. 5.
  • FIG. 18 is a scheme of an exemplary embodiment of an insert usable in the mechansim shown in FIG. 17 and enabling the setting of any relative angular position between the oscillating and the rotating components.
  • FIG. 19 is a diagram illustrating the grinding conditions of points on the profile of minimum and maximum radii, for a rectangular workpiece.
  • FIG. 20 is a diagram illustrating the grinding conditions of a transitional profile section, between points on the profile of minimum and maximum radii, for a rectangular workpiece.
  • FIG. 21 is a diagram illustrating a family of curves obtained as a result of grinding with a disc of different diameters.
  • FIG. 22 is a diagram of an exemplary embodiment of the basic system of a grinding machine according to the invention.
  • FIG. 23 is a diagram for determining the nature of the auxiliary movements arising in the grinding machine according to the invention, and illustrating the grinding conditions of points of minimum and maximum radii on the profile.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
US459378A 1973-04-24 1974-04-09 Grinding machine for machining polygonal workpieces Expired - Lifetime US3886693A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUNE509A HU167643B (fr) 1973-04-24 1973-04-24

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US3886693A true US3886693A (en) 1975-06-03

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Country Link
US (1) US3886693A (fr)
JP (2) JPS5063592A (fr)
AT (1) AT335875B (fr)
BE (1) BE814106A (fr)
BG (1) BG33002A3 (fr)
BR (1) BR7403331D0 (fr)
CH (1) CH591929A5 (fr)
CS (1) CS175376B2 (fr)
DD (1) DD113861A5 (fr)
DE (1) DE2418566C2 (fr)
ES (1) ES425597A1 (fr)
FR (1) FR2227089B1 (fr)
GB (1) GB1461513A (fr)
HU (1) HU167643B (fr)
IT (1) IT1010009B (fr)
NL (1) NL7405258A (fr)
PL (1) PL92571B1 (fr)
SE (1) SE411107B (fr)
SU (2) SU651673A3 (fr)
YU (1) YU37080B (fr)

Cited By (17)

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Publication number Priority date Publication date Assignee Title
US4373298A (en) * 1981-01-30 1983-02-15 Coburn Optical Industries, Inc. Automatic edge beveller for removing the sharp peripheral edges of ophthalmic lenses
US4553885A (en) * 1981-07-06 1985-11-19 Magyar Vagon-Es Gepgyar Apparatus for the initial and improvement machining of active surface of steer cams, particularly of brake spanners
US4648295A (en) * 1982-06-19 1987-03-10 Hans Ley Method for producing workpieces having polygonal outer and/or inner contours and apparatus for implementing the method
US4651599A (en) * 1983-08-01 1987-03-24 Hans Ley Method for producing workpieces having polygonal outer and/or inner contours
EP0329087A1 (fr) * 1988-02-15 1989-08-23 Tokyo Seimitsu Co.,Ltd. Méthode et dispositif pour finisage sur machine pour rectifier une surface cylindrique intérieure
US5081795A (en) * 1988-10-06 1992-01-21 Shin-Etsu Handotai Company, Ltd. Polishing apparatus
US5101601A (en) * 1988-06-04 1992-04-07 Ford Motor Company Grinding workpieces
US5697831A (en) * 1995-05-06 1997-12-16 Schaudt Maschinenbau Gmbh Machine tool with plural tool spindles
US6244946B1 (en) 1997-04-08 2001-06-12 Lam Research Corporation Polishing head with removable subcarrier
US6425812B1 (en) 1997-04-08 2002-07-30 Lam Research Corporation Polishing head for chemical mechanical polishing using linear planarization technology
US6666756B1 (en) 2000-03-31 2003-12-23 Lam Research Corporation Wafer carrier head assembly
US20040029487A1 (en) * 2000-12-22 2004-02-12 Rolltest Oy Grinding method
WO2009098684A2 (fr) * 2008-02-04 2009-08-13 Tamar Advanced Technologies S.H. Ltd Joint rotatif amélioré du type matériau d’étanchéité sous pression
CN102059592A (zh) * 2010-08-17 2011-05-18 上海交通大学 多边形基于恒磨除率变速非圆磨削方法
CN108908079A (zh) * 2018-07-17 2018-11-30 淮安青岛科技大科技服务有限公司 一种封隔器胶筒外壁抛光设备
US20220001922A1 (en) * 2018-11-29 2022-01-06 Schaeffler Technologies AG & Co. KG Actuator for a rear axle steering system of a vehicle and rear axle steering system having such an actuator
ES2924576A1 (es) * 2021-03-25 2022-10-07 Univ Almeria Mecanismo para generar poligonos regulares

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JPS5642255Y2 (fr) * 1976-04-13 1981-10-02
DE3517302A1 (de) * 1985-05-14 1986-11-20 Evertz, Egon, 5650 Solingen Vorrichtung zum schleifen von halbzeug
GB2211453A (en) * 1987-10-26 1989-07-05 Compression Tech Apparatus and method for machining a trochoidal rotor
EP0335255B1 (fr) * 1988-03-26 1993-09-15 Fortuna-Werke Maschinenfabrik GmbH Procédé de rectification d'un cône polygonal sur une rectifieuse à commande numérique
CN112658763B (zh) * 2020-12-30 2022-10-18 四川明日宇航工业有限责任公司 一种薄壁长管铸件加工方法
CN114227486B (zh) * 2021-12-21 2023-07-25 马鞍山市大马机械制造有限公司 一种鳄鱼剪切机锤头偏心调修装置及其调修方法
CN114523400B (zh) * 2022-02-17 2023-05-05 九江聚鸿新材料有限公司 一种灵活装配式线条成型机
CN117644471B (zh) * 2024-01-29 2024-04-16 北京特思迪半导体设备有限公司 偏心驱动机构的偏心距精确调节方法

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US3593603A (en) * 1968-10-07 1971-07-20 Licencia Talalmanyokat Turning machine for machining workpieces of multicontoured configurations
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GB425311A (en) * 1933-09-07 1935-03-07 Stanley Jaffa Harley Improvements in metal grinding operations
DE710067C (de) * 1939-08-04 1941-09-03 Ernst Krause & Co Werkzeugmaschine, insbesondere Schleifmaschine zur Herstellung von durch cycloidische Kurven begrenzten Querschnitten an Aussen- und Innenprofilen
DE740873C (de) * 1941-07-19 1943-10-29 Ernst Krause & Co Werkzeugmaschine, insbesondere Schleifmaschine, zur Herstellung von durch zykloidische Kurven begrenzten Querschnitten an Aussen- und Innenprofilen
DE1752285C3 (de) * 1968-05-02 1982-02-25 Licencia Találmányokat Ertékesítö Vállalat, Budapest Drehmaschine zum Herstellen von Werkstücken mit im Querschnitt regelmäßig unrunden und in Achsrichtung gewindeartig verlaufenden Außen- oder Innenmantelflächen
GB1242473A (en) * 1969-08-07 1971-08-11 Vni Instrument Inst Machine for closed-contour grinding of parts with variable curvature

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2144771A (en) * 1933-05-04 1939-01-24 Ernst Krause & Co A G Device for working sectional shapes for shafts and bores
US2267250A (en) * 1938-03-25 1941-12-23 Ernst Krause & Co A G Production of cross-section profiles bounded by cycloidal curves
US2909010A (en) * 1955-03-24 1959-10-20 Fischer Ag Georg Process of and apparatus for forming manifold symmetrical non-circular profiles on workpieces
US3593603A (en) * 1968-10-07 1971-07-20 Licencia Talalmanyokat Turning machine for machining workpieces of multicontoured configurations
US3623272A (en) * 1969-08-14 1971-11-30 Mark Davydovich Flid Machine for closed-contour grinding of parts with variable curvature

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373298A (en) * 1981-01-30 1983-02-15 Coburn Optical Industries, Inc. Automatic edge beveller for removing the sharp peripheral edges of ophthalmic lenses
US4553885A (en) * 1981-07-06 1985-11-19 Magyar Vagon-Es Gepgyar Apparatus for the initial and improvement machining of active surface of steer cams, particularly of brake spanners
US4648295A (en) * 1982-06-19 1987-03-10 Hans Ley Method for producing workpieces having polygonal outer and/or inner contours and apparatus for implementing the method
US4651599A (en) * 1983-08-01 1987-03-24 Hans Ley Method for producing workpieces having polygonal outer and/or inner contours
EP0329087A1 (fr) * 1988-02-15 1989-08-23 Tokyo Seimitsu Co.,Ltd. Méthode et dispositif pour finisage sur machine pour rectifier une surface cylindrique intérieure
US5101601A (en) * 1988-06-04 1992-04-07 Ford Motor Company Grinding workpieces
US5081795A (en) * 1988-10-06 1992-01-21 Shin-Etsu Handotai Company, Ltd. Polishing apparatus
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CN108908079A (zh) * 2018-07-17 2018-11-30 淮安青岛科技大科技服务有限公司 一种封隔器胶筒外壁抛光设备
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ES2924745A1 (es) * 2021-03-25 2022-10-10 Univ Almeria Mecanismo mejorado para generar poligonos regulares convexos y estrellados

Also Published As

Publication number Publication date
DE2418566C2 (de) 1983-10-27
FR2227089A1 (fr) 1974-11-22
GB1461513A (en) 1977-01-13
NL7405258A (fr) 1974-10-28
YU37080B (en) 1984-08-31
IT1010009B (it) 1977-01-10
DD113861A5 (fr) 1975-07-05
CS175376B2 (fr) 1977-05-31
FR2227089B1 (fr) 1977-12-09
BE814106A (fr) 1974-08-16
YU114574A (en) 1982-06-18
SE411107B (sv) 1979-12-03
ES425597A1 (es) 1976-09-01
JPS5417992U (fr) 1979-02-05
ATA294474A (de) 1976-07-15
HU167643B (fr) 1975-11-28
JPS5614034Y2 (fr) 1981-04-01
SU707512A3 (ru) 1979-12-30
BR7403331D0 (pt) 1974-12-24
PL92571B1 (en) 1977-04-30
AT335875B (de) 1977-04-12
BG33002A3 (en) 1982-11-15
CH591929A5 (fr) 1977-10-14
SU651673A3 (ru) 1979-03-05
JPS5063592A (fr) 1975-05-30
DE2418566A1 (de) 1974-11-21

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