EP0076635A1 - Crankpin grinding machine - Google Patents

Crankpin grinding machine Download PDF

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Publication number
EP0076635A1
EP0076635A1 EP82305151A EP82305151A EP0076635A1 EP 0076635 A1 EP0076635 A1 EP 0076635A1 EP 82305151 A EP82305151 A EP 82305151A EP 82305151 A EP82305151 A EP 82305151A EP 0076635 A1 EP0076635 A1 EP 0076635A1
Authority
EP
European Patent Office
Prior art keywords
spindle
axis
crankpin
pair
rotation
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.)
Withdrawn
Application number
EP82305151A
Other languages
German (de)
English (en)
French (fr)
Inventor
William E. Shank
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.)
Western Atlas Inc
Original Assignee
Litton Industrial Products 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.)
Filing date
Publication date
Application filed by Litton Industrial Products Inc filed Critical Litton Industrial Products Inc
Publication of EP0076635A1 publication Critical patent/EP0076635A1/en
Withdrawn legal-status Critical Current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
    • B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • 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
    • B24B5/36—Single-purpose machines or devices
    • B24B5/42—Single-purpose machines or devices for grinding crankshafts or crankpins
    • B24B5/421—Supports therefor

Definitions

  • crankpins of a crankshaft may be ground by sequentially transferring the crankshaft through a series of cylindrical grinding machines each dedicated to the grinding of one of the crankpins.
  • a crank transfer line of crankpin grinding machines includes a plurality of cylindrical grinding machines each having a single rotatable grinding wheel for effecting stock removal from a crankpin having a selected axial and rotary position.
  • the crankhead assembly of each such machine includes a clamping fixture which selectively clamps one end of the crankshaft on each of the plurality of main bearings leading to the crankpin to be ground.
  • a cylindrical grinding machine effects stock removal from a cylindrical workpiece, such as a crankpin on a crankshaft 10 schematically shown in Figures 1 and 2.
  • the illustrated V6 crankshaft has three pairs (P1, P2), (P3, P4), (P5, P6) of 120° related crankpins with the pins of each pair being offset by 30°.
  • the crankshaft includes four coaxial main bearings B1, B2, B3, B4, the inboard three of which are secured within clamping fixtures 01, C2, C3 of a crankhead assembly 12. Radially indexing a crankshaft while clamped in the clamping fixtures is disclosed in U.S. Patent No. 2,454,186.
  • the crankhead assembly 12 is secured to an inner spindle 14 ( Figure 3) which is located eccentrically within an outer spindle 16.
  • the inner spindle 14 is normally fixed relative to the outer spindle 16, but is capable of being rotated relative thereto.
  • the outer spindle 16 is supported for rotational and axial movement in a spindle housing 23 via a hydrostatic bearing arrangement.
  • Rotatably driving the outer spindle will, accordingly, effect rotation of the workpiece about the outer spindle axis A1 which is coaxial with the axis of crankpin P2 at a location where advancement of a rotating grinding wheel 18 can effect stock removal from that crankpin.
  • the other pin P1 of the crankpin pair will be located at the axial and radial grinding position by selectively axially and radially indexing the workpiece.
  • Axial indexing is effected by axially displacing the outer spindle 16 to the left,from its position shown in Figure 3 whereat an outer spindle shoulder or collar 25 abuts against a right-hand thrust face 24 of the hydrostatic bearing in the housing 23,to a position whereat an outer spindle shoulder or collar 26 abuts against a left-hand thrust face 22 of the hydrostatic bearing.
  • Axial displacement of the outer spindle 16 is effected by hydraulic actuator circuitry (shown diagrammatically), which communicates with recesses or fluid reservoirs in the outer spindle 16 and opening into the shoulders or collars 25 and 26.
  • the faces 24, 22 and shouldeisor collars 25, 26 are axially located so that the distance of axial movement of the outer spindle corresponds to the axial spacing, of the two pins P1, P2 of the pin pair to be ground.
  • the angular indexing of the workpiece is achieved by an indexing mechanism which rotates the inner spindle 14 about its axis A2 between first and second predetermined angular positions relative to the outer spindle and which maintains the inner spindle at either of these two positions.
  • a single counterweight 30 is secured to the outer spindle opposite the axis A2 of the eccentric inner spindle to balance the spindle assembly.
  • An indexing assembly 50 is secured to the right-hand end of the outer spindle 16 and includes redundant or duplicated gear drive mechanisms operatively associated with a driven gear 52 secured to the inner spindle 14.
  • Each gear drive mechanism includes a hydraulic motor 54 including a rack member 56 which is operatively engaged with a pinion gear 58.
  • a bar link 60 interconnects each pinion gear 58 with an associated gear 62 which drives gear 64 so as to step-up the displacement of the rack.
  • a gear 66 which is concentric to and operably connected to with gear 64 is operatively connected to the driven gear 52 which drives the inner spindle.
  • the driven gear 52 includes a stop mechanism which has two semicircular channels 70 ending with an end stop surface 72.
  • First and second stop pins 74 ( Figure 4) tangentially engage the stop mechanism of the gear 52 within the two channels.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
  • Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
EP82305151A 1981-10-07 1982-09-29 Crankpin grinding machine Withdrawn EP0076635A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US30921781A 1981-10-07 1981-10-07
US309217 1981-10-07

Publications (1)

Publication Number Publication Date
EP0076635A1 true EP0076635A1 (en) 1983-04-13

Family

ID=23197218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82305151A Withdrawn EP0076635A1 (en) 1981-10-07 1982-09-29 Crankpin grinding machine

Country Status (2)

Country Link
EP (1) EP0076635A1 (enrdf_load_stackoverflow)
JP (1) JPS5871058A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791428A1 (en) 1996-02-20 1997-08-27 Danobat, S. Coop A workhead with an eccentric chuck for grinding crankshafts
US20110003534A1 (en) * 2008-02-01 2011-01-06 Erwin Junker Maschinenfabrik Gmbh Method for grinding the main and rod bearings of a crankshaft by external cylindrical grinding and apparatus for carrying out the method

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454186A (en) * 1945-12-19 1948-11-16 Norton Co Crankpin grinding machine
US2651895A (en) * 1950-07-06 1953-09-15 Landis Tool Co Indexing device
US3142941A (en) * 1962-10-03 1964-08-04 Norton Co Grinding machine
US3584423A (en) * 1967-05-30 1971-06-15 Newell Engineering Co Ltd The Crankpin grinder
US4003721A (en) * 1976-04-26 1977-01-18 Landis Tool Company Cylindrical grinder
US4030252A (en) * 1976-06-03 1977-06-21 Landis Tool Company Workpiece transporting structure for use with a cylindrical grinder
US4033076A (en) * 1976-06-03 1977-07-05 Landis Tool Company Cylindrical grinding machine with workpiece loader and unloader

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454186A (en) * 1945-12-19 1948-11-16 Norton Co Crankpin grinding machine
US2651895A (en) * 1950-07-06 1953-09-15 Landis Tool Co Indexing device
US3142941A (en) * 1962-10-03 1964-08-04 Norton Co Grinding machine
US3584423A (en) * 1967-05-30 1971-06-15 Newell Engineering Co Ltd The Crankpin grinder
US4003721A (en) * 1976-04-26 1977-01-18 Landis Tool Company Cylindrical grinder
US4030252A (en) * 1976-06-03 1977-06-21 Landis Tool Company Workpiece transporting structure for use with a cylindrical grinder
US4033076A (en) * 1976-06-03 1977-07-05 Landis Tool Company Cylindrical grinding machine with workpiece loader and unloader

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0791428A1 (en) 1996-02-20 1997-08-27 Danobat, S. Coop A workhead with an eccentric chuck for grinding crankshafts
US20110003534A1 (en) * 2008-02-01 2011-01-06 Erwin Junker Maschinenfabrik Gmbh Method for grinding the main and rod bearings of a crankshaft by external cylindrical grinding and apparatus for carrying out the method
US8506357B2 (en) * 2008-02-01 2013-08-13 Erwin Junker Maschinenfabrik Gmbh Method for grinding the main and rod bearings of a crankshaft by external cylindrical grinding and apparatus for carrying out the method

Also Published As

Publication number Publication date
JPH0346262B2 (enrdf_load_stackoverflow) 1991-07-15
JPS5871058A (ja) 1983-04-27

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE FR GB IT

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840320

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SHANK, WILLIAM E.