US3885924A - Crankshaft grinding machine - Google Patents

Crankshaft grinding machine Download PDF

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Publication number
US3885924A
US3885924A US482803A US48280374A US3885924A US 3885924 A US3885924 A US 3885924A US 482803 A US482803 A US 482803A US 48280374 A US48280374 A US 48280374A US 3885924 A US3885924 A US 3885924A
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US
United States
Prior art keywords
crankshaft
axis
rotation
crank
grinding
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
US482803A
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English (en)
Inventor
Kurt Marowsky
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.)
Friedrich Schmaltz GmbH
Original Assignee
Friedrich Schmaltz GmbH
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 Friedrich Schmaltz GmbH filed Critical Friedrich Schmaltz GmbH
Application granted granted Critical
Publication of US3885924A publication Critical patent/US3885924A/en
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
    • 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

Definitions

  • a crankshaft grinding machine comprises a chuck for mounting the crankshaft for rotation about the axis of the main bearing pin and a grinding wheel mounted for reciprocation in relation to the crankshaft on a slide for movement perpendicular to the axes of rotation of the crankshaft and the grinding wheel.
  • a crank drive reciprocates the slide, the lengths of the cranks of the crankshaft and of the crank drive being identical and the crank drive including a push rod connected to the slide.
  • the length of the push rod is identical to the distance between the axis of the crankshaft crank pin and the axis of rotation of the grinding wheel.
  • the present invention relates to improvements in a grinding machine for grinding a crankshaft having a main bearing pin and a crank pin arranged to revolve around the main bearing pin during rotation of the crankshaft.
  • a chuck means mounts the crankshaft for rotation about the axis of the main bearing pin and a grinding wheel is mounted for movement in relation to the crankshaft for grinding the revolving crank pin.
  • the crankshaft is cen tered for rotation about the axis of the main bearing pin when the latter is to be ground and is then centered for rotation about the axis of the crank pin when grinding of the latter is desired.
  • the grinding wheel is supported for reciprocation in relation to the crankshaft in a direction perpendicular to the axis of rotation of the grinding wheel and a crank drive is operatively connected to the slide means for reciprocating the slide means.
  • the geometry of the crank drive conforms to the crank of the crankshaft to be ground, i.e., the lengths of the cranks of the crankshaft and of the crank drive are identical and the crank drive includes a push rod connected to the slide means, the length of the push rod being identical to the distance between the axis of the crank pin and the axis of rotation of the grinding wheel.
  • the axis of symmetry of the crank drive is parallel to the line of connection between the axis of the main bearing pin of the crankshaft and the axis of rotation of the grinding wheel.
  • the crankshaft and crank drive are driven synchronously so that both cranks work with the same cranking angle.
  • This simple structure whose positioning means operates most accurately, makes it possible to grind the main bearing pins and crank pins of crankshafts of large dimensions to a high degree of tolerance without the necessity of remounting the crankshaft during the entire grinding operation.
  • any deviations from the circular in the circumference of the pin may be compensated by introducing a corresponding error in the movement of the grinding wheel so as to counteract the error in the pin periphery.
  • FIG. I is a cross sectional end view along line ll of FIG. 2 of a crankshaft grinding machine according to this invention and FIG. 2 is a side elevational view of the machine.
  • the machine is shown to comprise support I for chuck 2 holding blank 3 of the crankshaft to be ground, the chuck being slidably arranged on guides 4 of the support. End portion 5 of the crankshaft 3 is held in clamping jaws 6 of chuck 2 and the clamping jaws are connected to rotatably mounted worm gear 7.
  • the worm gear meshes with gear 8 driven by motor 9 so that rotation of gear 8 by motor 9 causes rotation of the worm gear during operation of the grinding machine.
  • Bearing support 10 rotat ably supports worm gear 7 and crankshaft 3 is additional supported by bearings Ila and 11b along its length.
  • the bearings I0, Ila, 11b, chuck 2 and drive motor 9 are mounted on support 12 which is slidably arranged on guides 4 of support 1 for accurate adjustment.
  • Crankshaft blank 3 is supported on its bearings in the same manner as it would be arranged within a motor during operation thereof, i.e., main bearing shaft 13 of the crankshaft is centered while crank pin 14 revolves about the main bearing shaft.
  • Grinding wheel 15 is rotatably mounted in bearings 16 and is rotated by driving motor 17.
  • Bearings I6 are supported on a slide comprising upper slide part 18 reciprocal in a first direction indicated by double-headed arrow 19 while lower slide part 20 is reciprocal on support I in a second direction perpendicular to the first direction, as indicated by double-headed arrow 21.
  • Dovetailed guides 22 support upper slide part I8 for reciprocation on lower slide part 20 while guides 4a support the lower slide part for reciprocation on support 1.
  • Lower slide part 20 carries rearwardly directed arm 23 extending in the general direction of arrow 21 and one end of push rod 24 of a crank drive is longitudinally adjustably connected to the outer end of arm 23. The other end 25 of the push rod is connected to crank 26 whose rotary axle 27 is mounted on support 1.
  • the above-described grinding machine operates as follows:
  • crankshaft grinding machine is so arranged that, in all grinding positions of crank pin I4, two congruent triangles 28, 29 are formed, the triangles being congruent because two of their sides and the angle opposite the larger side are identical.
  • the length of crank 26 is the same as the distance from the axis of main bearing pin 13 to that of crank pin 14, and the length of push rod 24 is the same as the distance from the axis of crank pin 14 to axis 30 of rotation of grind ing wheel 15.
  • the angles formed by the crank of triangle 29 and by crank 26 of triangle 28 are necessarily identical because of the synchronous drive of crankshaft 3 and crank drive 26, 27.
  • the grinding machine of the invention is useful for grinding all types of used in used piston machines and presses, for instance.
  • a grinding machine for grinding a crankshaft having a main bearing pin and a crank pin arranged to re volve around the main bearing pin during rotation of the erankshafL the machine comprising 1. means for mounting the crankshaft for rotation about the axis of the main bearing pin.
  • a grinding wheel mounted for movement in rela tion to the crankshaft and for rotation about an axis substantially parallel to the axis of rotation of the main bearing pin of the crankshaft 3.
  • a slide means supporting the grinding wheel for re ciprocation in relation to the crankshaft in a direction perpendicular to the axes of rotation, and
  • crank drive operatively connected to the slide means for reciprocating the slide means
  • the crank drive including a push rod connected to the slide means, the length of the push rod being identical to the distance between the axis of the crank pin and the axis of rotation of the grinding wheel.
  • crankshaft grinding machine of claim 1 wherein the axis of symmetry ofthe crank drive extending from the axis of rotation of the crank of the drive to the point of connection of the push rod to the slide means is parallel to the line of connection between the axis of the main hearing pin of the crankshaft and the axis of rotation of the grinding wheel.
  • crankshaft grinding machine ofclaim I com prising means for synchronously driving the crank drive and the crankshaft.
  • crankshaft grinding machine of claim 1. comprising means for longitudinally adjustably connecting the push rod of the crank drive to the slide means.
  • crankshaft grinding machine of claim 1 wherein in all grinding positions two congruent triangles are formed, on the one hand, by the crank of the crankshaft, the distance between the axis of the crank pin and the axis of rotation of the grinding wheel and the distance between the axis of the main bearing pin and the axis of rotation of the grinding wheel. and on the other hand, by the crank of the crank drive the length of the push rod, and the distance between the axis of rotation of the crank drive and the point of con nection between the push rod and the slide means.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
US482803A 1973-07-02 1974-06-24 Crankshaft grinding machine Expired - Lifetime US3885924A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19732333661 DE2333661A1 (de) 1973-07-02 1973-07-02 Kurbelwellenschleifmaschine

Publications (1)

Publication Number Publication Date
US3885924A true US3885924A (en) 1975-05-27

Family

ID=5885737

Family Applications (1)

Application Number Title Priority Date Filing Date
US482803A Expired - Lifetime US3885924A (en) 1973-07-02 1974-06-24 Crankshaft grinding machine

Country Status (5)

Country Link
US (1) US3885924A (de)
JP (1) JPS5038195A (de)
AT (1) AT328906B (de)
DE (1) DE2333661A1 (de)
GB (1) GB1433079A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309134A (en) * 1978-08-19 1982-01-05 Gebrueder Heller, Maschinenfabrik Gmbh Crankshaft milling machine
US5251404A (en) * 1992-02-28 1993-10-12 General Motors Corporation Belt grinder for crankshaft pins
US6015336A (en) * 1998-05-26 2000-01-18 Zexel Corporation Grinding apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1508676A (en) * 1974-05-13 1978-04-26 Hollis Engineering Method and apparatus for temporarily supporting electrical or electronic components on a perforated circuit board
JPS5236759A (en) * 1975-09-18 1977-03-22 Oki Electric Ind Co Ltd Method of fixing parts on printed circuit board
AT340225B (de) * 1976-05-21 1977-12-12 Gfm Fertigungstechnik Kopiervorrichtung fur kurbelwellenfrasmaschinen
JPS54107858U (de) * 1978-01-17 1979-07-30
JPS54111675A (en) * 1978-02-22 1979-09-01 Fujitsu Ltd Soldering method of printed board
DE3108780C2 (de) * 1981-03-07 1984-10-25 Wilhelm Hegenscheidt Gmbh, 5140 Erkelenz Kurbelwellenfest- bzw. Glattwalzmaschine
DE19849025B4 (de) * 1998-10-23 2007-12-20 Bayerische Motoren Werke Ag Kurbelwellen-Schleifmaschine

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2232228A (en) * 1940-05-10 1941-02-18 Leblond Mach Tool Co R K Crankpin grinder
US2232229A (en) * 1940-05-20 1941-02-18 Leblond Mach Tool Co R K Crankpin grinder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB674065A (en) * 1948-06-10 1952-06-18 Robert Musyl Improvements in or relating to machines for grinding the main bearing pins and crank pins of crankshafts

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2232228A (en) * 1940-05-10 1941-02-18 Leblond Mach Tool Co R K Crankpin grinder
US2232229A (en) * 1940-05-20 1941-02-18 Leblond Mach Tool Co R K Crankpin grinder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4309134A (en) * 1978-08-19 1982-01-05 Gebrueder Heller, Maschinenfabrik Gmbh Crankshaft milling machine
US4494281A (en) * 1978-08-19 1985-01-22 Gebrueder Heller Maschinenfabrik Gmbh Crankshaft milling machine
US5251404A (en) * 1992-02-28 1993-10-12 General Motors Corporation Belt grinder for crankshaft pins
US6015336A (en) * 1998-05-26 2000-01-18 Zexel Corporation Grinding apparatus

Also Published As

Publication number Publication date
DE2333661A1 (de) 1975-01-23
JPS5038195A (de) 1975-04-09
AT328906B (de) 1976-04-12
ATA493674A (de) 1975-06-15
GB1433079A (en) 1976-04-22

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