WO2005051596A1 - Perfectionnements apportes aux machines a rectifier - Google Patents

Perfectionnements apportes aux machines a rectifier Download PDF

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Publication number
WO2005051596A1
WO2005051596A1 PCT/GB2004/004729 GB2004004729W WO2005051596A1 WO 2005051596 A1 WO2005051596 A1 WO 2005051596A1 GB 2004004729 W GB2004004729 W GB 2004004729W WO 2005051596 A1 WO2005051596 A1 WO 2005051596A1
Authority
WO
WIPO (PCT)
Prior art keywords
wheel
workpiece
wheelhead
axis
workholder
Prior art date
Application number
PCT/GB2004/004729
Other languages
English (en)
Inventor
Granville Grayston
Original Assignee
Unova U.K. Limited
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 Unova U.K. Limited filed Critical Unova U.K. Limited
Priority to EP04798452A priority Critical patent/EP1687118B1/fr
Priority to DE602004006296T priority patent/DE602004006296T2/de
Publication of WO2005051596A1 publication Critical patent/WO2005051596A1/fr

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
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies
    • B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
    • 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
    • B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
    • 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
    • B24B19/12—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 for grinding cams or camshafts
    • B24B19/125—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 for grinding cams or camshafts electrically controlled, e.g. numerically controlled
    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/04—Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels
    • B24B53/053—Devices or means for dressing or conditioning abrasive surfaces of cylindrical or conical surfaces on abrasive tools or wheels using a rotary dressing tool
    • 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
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/10—Single-purpose machines or devices
    • B24B7/16—Single-purpose machines or devices for grinding end-faces, e.g. of gauges, rollers, nuts, piston rings

Definitions

  • This invention concerns grinding machines and in particular a grinding machine by which flat or profiled surfaces or slots with a flat or profiled bottom surface can be ground.
  • Shaft encoders, position and movement sensors and gauges can provide feedback signals to the computer to allow grinding to be controlled.
  • the present invention seeks to provide an improved grinding machine of the type above described.
  • a grinding machine comprises :-
  • the wheelhead is movable along two orthogonal X and Z linear axes in a first plane in which movement along the X axis moves the wheel towards or away from the workholder,
  • the workholder is rotatable about a C axis which is parallel to and in the same plane as the axis of rotation of the wheel, the common plane being coincident with or parallel to the said first plane, and
  • control system is operable to control the rotational movement of the workpiece about the C axis and the movement of the wheelhead along the X and Z axes, so as to determine how the workpiece is to be ground.
  • control system may be programmed to move the wheelhead along at least one of the X and Z axes to move the wheel into engagement with a wheel-dressing tool, (when a dressable wheel is used).
  • control means is programmed to:
  • the workpiece comprises part of the perimeter of a circular object
  • the latter is positioned in the workholder so as to be rotatable about its central axis and the control means is programmed to :-
  • the part may be one of a plurality of similar circularly spaced apart regions around the periphery of the circular object or one of a plurality of articles circularly spaced around a circular support such as a circular rotatable workholder, and each preferably protrudes radially beyond the periphery thereof.
  • the latter conveniently comprises a chuck fixture having jaws for gripping the articles at circularly spaced apart points fherearound.
  • curvature of the surface is to be centred on an axis which is parallel to or coincident with the central axis of rotation of the circular object or support or workholder, only the workholder needs to be oscillated about its central axis.
  • the wheelhead includes a first face on which the grmdmg wheel is mounted and at least one further face from which at least one further tool such as a further grinding wheel, or a milling or a drilling tool, or any combination thereof, protrudes, and the grinding wheel or the at least one further tool is brought into machining engagement with a workpiece by moving the wheelhead along its Z axis so that when advanced towards the workpiece along the X axis, the grinding wheel or the said further tool will move towards and engage the workpiece.
  • at least one further tool such as a further grinding wheel, or a milling or a drilling tool, or any combination thereof
  • a dressing tool may be provided for dressing the further tool or tools as required and the control system is programmed to move the wheelhead about X or Z axes to engage the or each further tool with the dressing tool.
  • a plurality of dressing tools may be provided at different positions relative to the wheelhead to simplify the movement of the wheelhead to engage the wheel or further tool(s) with the dressing tools.
  • Figs 1A-1D illustrate a grinding machine constructed and adapted to operate in accordance with one aspect of the invention, for grinding a single workpiece
  • Figs 2A-2D illustrate a similar machine set to grind a plurality of workpieces
  • Figs 3A-3D illustrate a machine similar to that of Fig 1 but having additional machining tooling mounted on the wheelhead, and
  • Figs 4A-4D illustrate a machine similar to that of Fig 2 but having additional machining tooling mounted on the wheelhead.
  • the machine illustrated in Figs 1A-1D comprises a wheelhead 10 carrying a grinding wheel 12 driven about the S-axis (see Fig IB) by a motor (not shown) within or on the wheelhead 10.
  • the latter is slidable along a linear track (conveniently referred to as the Z- axis) parallel to the axis of rotation 18 of the wheel 12 and denoted by the dotted line 19.
  • Adjacent to the wheelhead is a workhead generally designated 20, which includes a drive for rotating a workpiece 22 about a parallel axis 24. This is referred to as the C-axis.
  • a workholder 23 is mounted on the workhead 20 and the workholder is rotatable about the C-axis by the workhead drive (not shown)
  • the workpiece 22 shown in Fig 1A is a camshaft for an internal combustion engine and the grinding wheel 12 is set to grind a slot in one end of the shaft. To this end the wheelhead is movable along an orthogonal linear track denoted by the dotted line 25, referred to as the X-axis.
  • X, Z, C and S axes are also denoted in Figs IB and ID.
  • Wheel dressing tools are denoted at 26, 28 and 30. Movement of the wheelhead along the X and Z axes allows the wheel to be brought into dressing engagement with one or the other of the wheel dressing tools 28 and 30. Independent movement of the other tool 26 enables it to perform a wheel dressing function.
  • Fig IB is a view of the machine from above in the direction of arrow B of Fig 1A.
  • Fig 1C is a view of the machine in the direction of arrow C in Fig 1A albeit with the machine rotated through 180° about the axis of the camshaft workpiece.
  • Fig ID is a side view of the machine of Fig 1A in which the wheel dressing tool 30 has been omitted.
  • the slot (not shown) is formed by plunge grinding into the end face of the camshaft 22.
  • the width of the slot is determined by the width of the wheel 12 and will have parallel sides, but since the wheel is circular, the base of the slot will have a radius of curvature similar to the radius of the wheel. Slots of greater width may be ground by moving the wheel along the Z-axis.
  • the workhead 20 rotates the workholder 23 and the camshaft 22 about the C-axis with an oscillating rocking motion at the same time as the wheelhead is advanced and retracted in a similar oscillatory motion along the X-axis, so that the locus of the point of contact between the wheel 12 and the workpiece 22 is a straight line denoted by 32 in Fig ID.
  • the line 32 is orthogonal to the X and Z axes, but if the base of the slot is to be inclined relative to the workpiece axis, so that line 32 would not appear vertical and perpendicular to line 25 (the X-axis) in Fig ID, but instead would be inclined by an angle of less than 90° to the X-axis, the movement of the wheelhead along the X-axis is adjusted so that the locus of the point of contact between wheel and workpiece describes a straight line such as 34 in Fig ID.
  • Figs 2A-2D the camshaft workpiece and workholder 22, 23 are replaced by a disc workholder 36 around the periphery of which are mounted a plurality of small similar workpieces, one of which is denoted at 38.
  • the wheel 12 is now replaced by wheel 40 which is to grind the outer face 41 of each workpiece such as 38. Where this is to be a flat surface the wheelhead 10 and workholder 36 are moved as before about the X and C axes so that the line of contact between the wheel and workpiece moves in a flat plane similar to that denoted by line 32 in Fig ID.
  • Figs 3 and 4 are similar to those in Figs 1 and 2 respectively except that additional machining tools are provided, denoted by 42, 43 and carried by an auxiliary head 45 mounted on the wheelhead 10. Movement of the latter along the Z-axis allows tool 42 or 43 to be aligned with the workpiece and movement along the X-axis allows for machining engagement therebetween.
  • synchronous movement of the wheelhead 10 and workholder 23 or 36 allows a flat surface to be ground by the curved outer surface of the wheel 12, and as mentioned the ground surface may be inclined or perpendicular to an axis of the workpiece.
  • a convexly curved surface is to be ground on the workpiece, the head and workholder are moved relatively in a different manner, so that the locus of the point of contact between wheel and workpiece describes an appropriately curved surface, which will correspond to the final ground surface of the workpiece.
  • a wheel 12 must be chosen whose radius is not greater than R, and is preferably somewhat smaller, and the curved surface is again produced by synchronous relative movement between wheelhead and workholder.
  • Control of the machine including the oscillatory movements along the X-axis and about the C-axis, is preferably achieved using a computer based programmable control system denoted by 46 in each of the Figures.
  • the side faces such as 45 (see Figs 2D and 4D) of a workpiece such as 38 may be ground using the side faces of the wheel 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Disintegrating Or Milling (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)

Abstract

L'invention concerne une machine à rectifier comprenant un socle, une poupée porte-meule (10), porteuse d'une meule (12), comportant des moyens d'entraînement de la meule, un porte-pièce (22, 23, 36) et des moyens d'entraînement en rotation d'une pièce, montés sur celui-ci, autour d'au moins un axe (24), des moyens d'entraînement du porte-pièce permettant le déplacement de celui-ci, ainsi que de la pièce, par rapport au socle de la machine, des moyens d'entraînement de la poupée porte-meule, permettant le déplacement de celle-ci par rapport au socle, et un système de commande de base, par ordinateur, programmable (46), permettant de commander indépendamment les mouvements pour une opération de rectification, par contact de la meule avec la pièce. Le procédé de rectification d'une pièce est caractérisé en ce que le positionnement est déterminé par le système de commande, du fait que la poupée porte-meule est déplaçable le long de deux axes linéaires orthogonaux X et Z, dans un premier plan dans lequel le mouvement le long de l'axe X déplace la meule en direction, ou à distance du porte-pièce, et en ce que le porte-pièce peut tourner autour d'un axe C qui est parallèle à/et dans le même plan que/ l'axe (18) de rotation de la meule, le plan commun étant en coïncidence avec ledit premier plan, ou parallèle à celui-ci, et en ce que durant le contact entre la meule et la pièce, le système de commande commande le mouvement de rotation de la pièce autour de l'axe C et le déplacement de la poupée porte-pièce le long des axes X et Z, de manière à déterminer dans quelle mesure la pièce doit être rectifiée. Une fois la rectification effectuée, le système de commande est programmé pour déplacer la poupée porte-pièce le long d'au moins l'un des axes X et Z, en vue d'amener la meule en prise avec un outil dresse-meule. Le système peut être programmé de manière à rectifier une fente dans une face terminale de la pièce.
PCT/GB2004/004729 2003-11-21 2004-11-08 Perfectionnements apportes aux machines a rectifier WO2005051596A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04798452A EP1687118B1 (fr) 2003-11-21 2004-11-08 Perfectionnements apportes aux machines a rectifier
DE602004006296T DE602004006296T2 (de) 2003-11-21 2004-11-08 Verbesserungen von schleifmaschinen und diese betreffend

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0327104.6 2003-11-21
GB0327104A GB2408224B (en) 2003-11-21 2003-11-21 Improvements in and relating to grinding machines

Publications (1)

Publication Number Publication Date
WO2005051596A1 true WO2005051596A1 (fr) 2005-06-09

Family

ID=29764204

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2004/004729 WO2005051596A1 (fr) 2003-11-21 2004-11-08 Perfectionnements apportes aux machines a rectifier

Country Status (5)

Country Link
EP (1) EP1687118B1 (fr)
AT (1) ATE361176T1 (fr)
DE (1) DE602004006296T2 (fr)
GB (1) GB2408224B (fr)
WO (1) WO2005051596A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100436056C (zh) * 2007-03-21 2008-11-26 潘旭华 一种凸轮的磨削方法
GB0801366D0 (en) * 2008-01-25 2008-03-05 Cinetic Landis Grinding Ltd Machine tools and methods of operation thereof
GB2476468B (en) 2009-12-22 2012-08-15 Cinetic Landis Ltd Machine tools and methods of operation thereof
CN102689245B (zh) * 2012-06-12 2014-03-19 河南省四达仙龙实业有限公司 一种棒料端头平面磨削机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257194A2 (fr) * 1986-08-26 1988-03-02 Buderus Schleiftechnik GmbH Rectifieuse pour rectifier automatiquement des surfaces cylindriques intérieures ou extérieures des surfaces planes et/ou des filets intérieurs et extérieurs
WO1996005940A1 (fr) * 1994-08-19 1996-02-29 Western Atlas U.K. Limited Perfectionnements apportes aux meuleuses rectifieuses ou s'y rapportant
US6419563B1 (en) * 1999-09-30 2002-07-16 Toyoda Koki Kabushiki Kaisha Method of and an apparatus for machining a workpiece with plural tool heads

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4375670A (en) * 1979-10-29 1983-03-01 Gfm Gesellschaft Fur Fertigungstechnik Und Maschinenbau Gesellschaft Mbh Machine tool for machining crankshafts and control system for the machine tool
US4443975A (en) * 1981-01-26 1984-04-24 The Warner & Swasey Company Dual wheel cylindrical grinding center
CH684250A5 (de) * 1991-10-17 1994-08-15 Kellenberger & Co Ag L Verfahren zur numerisch steuerbaren Bearbeitung eines Werkstückes an einer Schleifmaschine.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0257194A2 (fr) * 1986-08-26 1988-03-02 Buderus Schleiftechnik GmbH Rectifieuse pour rectifier automatiquement des surfaces cylindriques intérieures ou extérieures des surfaces planes et/ou des filets intérieurs et extérieurs
WO1996005940A1 (fr) * 1994-08-19 1996-02-29 Western Atlas U.K. Limited Perfectionnements apportes aux meuleuses rectifieuses ou s'y rapportant
US6419563B1 (en) * 1999-09-30 2002-07-16 Toyoda Koki Kabushiki Kaisha Method of and an apparatus for machining a workpiece with plural tool heads

Also Published As

Publication number Publication date
GB2408224B (en) 2005-11-09
DE602004006296T2 (de) 2008-01-10
GB0327104D0 (en) 2003-12-24
EP1687118B1 (fr) 2007-05-02
GB2408224A (en) 2005-05-25
ATE361176T1 (de) 2007-05-15
DE602004006296D1 (de) 2007-06-14
EP1687118A1 (fr) 2006-08-09

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