EP0724500B1 - Schleifmaschine - Google Patents

Schleifmaschine Download PDF

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Publication number
EP0724500B1
EP0724500B1 EP94930282A EP94930282A EP0724500B1 EP 0724500 B1 EP0724500 B1 EP 0724500B1 EP 94930282 A EP94930282 A EP 94930282A EP 94930282 A EP94930282 A EP 94930282A EP 0724500 B1 EP0724500 B1 EP 0724500B1
Authority
EP
European Patent Office
Prior art keywords
worktable
workpiece
grinding
relative
tailstock
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 - Lifetime
Application number
EP94930282A
Other languages
English (en)
French (fr)
Other versions
EP0724500A1 (de
Inventor
Michael Laycock
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.)
Intermec Europe Ltd
Original Assignee
Unova UK Ltd
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 UK Ltd filed Critical Unova UK Ltd
Publication of EP0724500A1 publication Critical patent/EP0724500A1/de
Application granted granted Critical
Publication of EP0724500B1 publication Critical patent/EP0724500B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • B24B41/065—Steady rests

Definitions

  • This invention concerns a grinding machine as per the preamble of Claim 1.
  • An example of such a machine is disclosed by US 5103596 A.
  • the present invention provides an alternative solution to this problem.
  • a grinding machine having a table or frame and a grinding wheel relative to which the table is moveable.
  • the table carries firstly a headstock and a tailstock upon which a workpiece is rotationally mounted, and which are relatively adjustable in spacing on the table, and secondly an adjustable workrest.
  • this known machine is not sufficiently flexible to enable smaller runs of different components to be rapidly machined.
  • US-A-5103596 discloses a grinding machine having a worktable and a grinding wheel relative to which the worktable is movable, the latter carrying firstly a headstock and a tailstock adjustable in spacing and secondly a movable workrest or deflection-supressing device, wherein the workrest and at least one of the headstock and tailstock are adjustable relative to the worktable.
  • a grinding machine having a worktable and a grinding wheel relative to which the worktable is movable, the latter carrying firstly a headstock and a tailstock adjustable in spacing and secondly a movable workrest or deflection-supressing device, wherein the workrest and at least one of the headstock and tailstock are adjustable relative to the worktable.
  • Such a machine is particularly suited to the accurate grinding of slender cylindrical workpieces.
  • Document JP 5031667A discloses an automated grinding system in which a storage medium containing tooling data is physically associated with a workpiece to be ground, and an NC device reads this data and thus controls workpiece engagement elements including a grinding wheel, headstock, tailstock, workrests and measuring parts.
  • this known system does not disclose any means for obviating possible errors in the lateral positioning of the workpiece.
  • a grinding machine having a worktable and a grinding wheel relative to which the worktable is movable, the worktable carrying firstly a headstock and tailstock adjustable in spacing and secondly an adjustable workrest, at least one of the headstock and tailstock and additionally the workrest being adjustable relative to the worktable, characterised in that the relative movements and adjustments are computer controlled independently of the relative position of the grinding wheel and worktable by programmable drive means programmed at least in part with respect to a lateral reference, which serves to determine the relative position of the grinding wheel and the worktable in a direction parallel to an axis extending between the headstock and the tailstock, thereby to position the headstock and/or the tailstock and/or the workrest, enabling different workpieces and parts thereof to be positioned in their precise position in front of the grinding wheel for grinding.
  • the main machine bed 10 supports a wheelhead not visible, within the slidable enclosure 12 which can be opened to enable workpieces to be inserted and removed and includes an inspection window 14.
  • a computer based control system 16 stands adjacent the machine and can be manually adjusted to control the machine so as to receive and grind different workpieces according to pre-programmed information.
  • FIG. 2 There is shown in Figure 2 a probe 18 which can be seen engaging the radial shoulder 20 of a pre-machined section of the workpiece 22.
  • the probe is adapted to be driven into engagement with the machine diameter of the segment 22 and then moved radially until it engages the radial shoulder it is seeking.
  • Positional information is derived therefrom and sent to the computer control centre 16.
  • the workpiece is also visible in Figure 2 and is denoted by reference numeral 24.
  • Workrests are also visible at 26 and 28 and drive means within the workrests adjust them perpendicularly to the workpiece and if required laterally relative to the workpiece.
  • Signals for controlling the drives for the workrests 26 and 28 are derived from the control centre 16.
  • Figure 3 shows the same part of the machine as viewed from a more distant point showing the beginning of the headstock assembly 30 and the tailstock at 32.
  • Figure 3 also shows the additional workrests at 34 and 36.
  • Each of the latter includes drives similar to those for workrests 26 and 28 and is operable in the same way from the control centre 16.
  • the wheelhead assembly of the grinding machine is mounted on a pivotable platform.
  • Figure 4 shows the wheelhead assembly at 40 mounted on a base 42 which itself is pivotable relative to a sub-base 44 carried on the machine bed 46.
  • a pivot axis (not shown in Figure 4) but preferably orthogonal to the axis of rotation of the grinding wheel, so the angle of attack of the wheel to the workpiece can be adjusted.
  • Drive means for effecting this sliding and thereby pivoting or tilting of the wheelhead assembly 40 is shown in Figure 5.
  • This comprises a hydraulic or pneumatic ram 48 acting between the platform 42 and pivotally mounted at 50 to the sub-base 44.
  • Mounted thereon at 52 is a control device for the ram to enable the latter to be advanced and retracted under control signals from the control centre 16.
  • radial work supports workrests
  • axial work support tailstock or footstock
  • the headstock can be fixed relative to the worktable, but this is not necessarily the case.
  • the worktable can also be positioned by the computer, laterally with respect to the grinding wheel on the wheelhead. It is apparent that, if the worktable is moved, the workrests, footstock and headstock that are mounted upon the worktable also move. The adjusted position of the worktable defines a lateral reference position.
  • the control system uses length information relating to the component to automatically position the footstock upon the worktable, so as to provide the necessary end thrust to properly constrain the component.
  • the control system uses the work support diameter lateral position information to automatically position the workrests upon the worktable, so that they laterally align with the component work support diameters.
  • the control system uses the lateral positions of the cam lobes and plain diameters to automatically position the worktable so that the cam lobes and plain diameters are sequentially brought in front of the grinding wheel so that they may be ground.
  • Variation in lateral position of the cam lobes/plain diameters and work support diameters due to component tolerance variation, e.g. variation in centre depth, is eliminated by use of the electronic measurement probe.
  • the probe is automatically advanced, under computer control, at the start of each cycle, after the footstock is positioned to support the component.
  • the worktable is positioned so as to place a measurement reference face at its theoretically correct position with respect to the probe.
  • the probe is advanced onto the measurement face and measures the error in lateral position of the measurement reference face.
  • the measured error is then algebraically summed with the programmed lateral positions of the cam lobes/plain diameters and work support diameters taken from the component drawing so correcting any possible error in lateral position.
  • each cam lobe or plain diameter is used automatically to swivel the grinding wheel axis of rotation about a vertical axis to the specified angle before each grind so that the specified surface incline is achieved on the finished component.
  • the cam profile data is used to grind non-round shapes at the specified angular positions.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (7)

  1. Eine Schleifmaschine mit einem Arbeitstisch und einer Schleifscheibe (38), gegenüber der der Arbeitstisch verschiebbar ist, der erstens einen Spindelstock (30) und einen gegenüber diesem im Abstand einstellbaren Reitstock (32) und zweitens eine verstellbare Werkstückauflage (26) trägt, wobei mindestens der Spindelstock (30) oder der Reitstock (32) und zusätzlich die Werkstückauflage (26) gegenüber dem Arbeitstisch verstellbar sind, dadurch gekennzeichnet, daß die Relativbewegungen und Einstellungen unabhängig von der Relativlage der Schleifscheibe (38) und des Arbeitstisches durch programmierbare, mindestens teilweise gegenüber einem Seitenbezugspunkt (18) programmierte Antriebsmittel rechnergesteuert sind, wobei der Seitenbezugspunkt (18) zum Bestimmen der Relativlage der Schleifscheibe (38) und des Arbeitstisches in einer Richtung parallel zu einer zwischen dem Spindelstock (30) und dem Reitstock (32) verlaufenden Achse dient, um damit den Spindelstock (30) und/oder den Reitstock und/oder die Werkstückauflage (26) zu positionieren und die Positionierung von verschiedenen Werkstücken (24) und deren Teilen zum Schleifen in ihrer genauen Stellung vor der Schleifscheibe (38) zu ermöglichen.
  2. Eine Schleifscheibe nach Anspruch 1, wobei der Rechner (16) mit sich auf das zu schleifende Werkstück (24) und dessen zu schleifende Teile beziehender Positions- und Abmessungsinformation programmiert ist.
  3. Eine Schleifmaschine nach irgendeinem vorhergehenden Anspruch, bei der der Seitenbezugspunkt mit einem Tastkopf (16) versehen ist, der in Richtung auf das Werkstück (24) zu und von diesem weg und in einer Richtung parallel zu der Achse des Werkstücks (24) zum Ermöglichen einer Lageerfassung eines Teils des Werkstücks (24) durch den Tastkopf (18) relativ verschiebbar ist.
  4. Eine Schleifmaschine nach irgendeinem vorhergehenden Anspruch, bei der der Rechner (16) die relativen Seitenlagen der Radialflächen (20) des Werkstücks (24) zum Positionieren des Arbeitstisches automatisch verwendet, so daß zu schleifende Teile zum Schleifen durch die Schleifscheibe (38) in ihrer Lage sequentiell erfaßt werden.
  5. Eine Schleifmaschine nach irgendeinem vorhergehenden Anspruch, bei der der Rechner (16) sich auf die Länge eines Werkstücks (24) beziehende Information zum automatischen Positionieren des Reitstocks (32) gegenüber dem Arbeitstisch verwendet.
  6. Eine Schleifmaschine nach irgendeinem vorhergehenden Anspruch, bei der der Rechner (16) eine sich auf das Werkstück (24) beziehende Durchmesserinformation zum automatischen Positionieren einer oder mehrerer Werkstückauflagen (26) gegenüber dem Arbeitstisch verwendet.
  7. Eine Schleifmaschine nach irgendeinem vorhergehenden Anspruch, bei der die Achse der Schleifscheibe (38) unter der Steuerung des Computers (16) zum Schrägschleifen des Werkstücks (24) gekippt werden kann.
EP94930282A 1993-10-20 1994-10-20 Schleifmaschine Expired - Lifetime EP0724500B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB939321639A GB9321639D0 (en) 1993-10-20 1993-10-20 Improvements in and relating grinding machines
GB9321639 1993-10-20
PCT/GB1994/002302 WO1995011110A1 (en) 1993-10-20 1994-10-20 Improvements in and relating to grinding machines

Publications (2)

Publication Number Publication Date
EP0724500A1 EP0724500A1 (de) 1996-08-07
EP0724500B1 true EP0724500B1 (de) 2000-10-11

Family

ID=10743853

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94930282A Expired - Lifetime EP0724500B1 (de) 1993-10-20 1994-10-20 Schleifmaschine

Country Status (6)

Country Link
EP (1) EP0724500B1 (de)
AU (1) AU7944494A (de)
DE (1) DE69426125T2 (de)
ES (1) ES2150995T3 (de)
GB (1) GB9321639D0 (de)
WO (1) WO1995011110A1 (de)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999067055A1 (en) * 1998-06-25 1999-12-29 Unova U.K. Limited Apparatus and method for grinding composite workpieces
IT1403602B1 (it) * 2010-12-22 2013-10-31 Tenova Spa Metodo per il posizionamento di cilindri operativi su di una macchina rettificatrice e macchina rettificatrice che attua tale metodo
DE102016101196B4 (de) * 2016-01-25 2018-02-01 Schaudt Mikrosa Gmbh Verfahren und Rundschleifmaschine zur Schleifbearbeitung von Getriebewellen, Nockenwellen oder Kurbelwellen sowie Maschinensteuerungsprogramm für eine Steuereinrichtung zur Ausführung des Verfahrens
GB201811991D0 (en) * 2018-07-23 2018-09-05 Fives Landis Ltd A grinding machine including a workrest and methods of operation thereof
CN112719896B (zh) * 2020-12-21 2021-12-31 杭州光帝新能源科技有限公司 一种路灯加工切割装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0531667A (ja) * 1991-07-23 1993-02-09 Okuma Mach Works Ltd 研削加工自動化システム

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2639559A (en) * 1950-08-09 1953-05-26 Landis Tool Co Cam grinder
IT1189451B (it) * 1986-04-04 1988-02-04 Giustina International Spa Lunetta di supporto regolabile per macchine rettificatrici per cilindri e simili
IT1210569B (it) * 1987-04-27 1989-09-14 Brunello Casarotto & Zanella Rettificatrice per esterni particolarmente per alberi a gomito.
US5103596A (en) * 1990-11-05 1992-04-14 Toshiba Kikai Kabushiki Kaisha Method and apparatus for controlling cylinder grinding machines

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0531667A (ja) * 1991-07-23 1993-02-09 Okuma Mach Works Ltd 研削加工自動化システム

Also Published As

Publication number Publication date
ES2150995T3 (es) 2000-12-16
DE69426125D1 (de) 2000-11-16
WO1995011110A1 (en) 1995-04-27
GB9321639D0 (en) 1993-12-08
AU7944494A (en) 1995-05-08
DE69426125T2 (de) 2001-05-10
EP0724500A1 (de) 1996-08-07

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