US2937479A - Crankshaft journal grinder - Google Patents

Crankshaft journal grinder Download PDF

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Publication number
US2937479A
US2937479A US612451A US61245156A US2937479A US 2937479 A US2937479 A US 2937479A US 612451 A US612451 A US 612451A US 61245156 A US61245156 A US 61245156A US 2937479 A US2937479 A US 2937479A
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US
United States
Prior art keywords
journal
cupwheel
grinding
crankshaft
fixture
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
US612451A
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English (en)
Inventor
Golten Sigurd
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.)
Individual
Original Assignee
Individual
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
Priority to IT591673D priority Critical patent/IT591673A/it
Application filed by Individual filed Critical Individual
Priority to US612451A priority patent/US2937479A/en
Priority to GB20700/58A priority patent/GB869240A/en
Priority to CH6127158A priority patent/CH364426A/de
Application granted granted Critical
Publication of US2937479A publication Critical patent/US2937479A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • B24B5/425—Single-purpose machines or devices for grinding crankshafts or crankpins in situ
    • 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

  • This invention relates to crankshaft journal grinder. Its principal object is to provide improved means for regrinding main and crankpin journals in large marine engines without removing the crankshaft from the engine and without laying up the ship for more than a few days. (When journals have been scored heretofore, it has 'been usually necessary to lay up the ship for weeks while the engine is torn down and the crankshaft removed forregrinding.)
  • a crankshaft consists of a series of main and crankpin journals connected by fillets to crank cheeks.
  • journal bearings run on the cylindrical portions of the journals, the ends of the bearings being chamfered to provide clearance so that they never touch the fillets.
  • An object of this invention is to use the fillets as the reference surfaces in regrinding crankshaft journals.
  • Another object is to use the engine frame to position the grinding wheel, while the crankshaft is turned in its other bearings, to regrind a main journal without removing the crankshaft from the engine.
  • A11 object of this invention is to provide means such as gravity or spring pressure for feeding the grinding wheel into contact, permitting the wheel to stop feeding or back away from the journal if the operator should release the feed too rapidly.
  • FIG. 1 is an elevational view of a crankshaft with sectional views of two modifications of the invention
  • Fig. 2 is an end view partly in section taken on the line 2-2 of Fig. 1;
  • Fig. 3 is a side view of a portion of Fig. 2, taken on the line 33;
  • Fig. 4 is an end view partly in section taken on the line 4-4 of Fig. 1;
  • Fig. 5 is a sectional view of a portion of the mechanism, taken on the line 5-5 of Fig. 4;
  • Fig. 6 is an end view partly in section taken on the line 6-6 of Fig. 1.
  • crankshaft 10 is mounted in bearings in fra-me 11.
  • Crankshaft 1t comprises the usual series of main journals and crankpin journals connected by fillets 23 to cheeks 14.
  • a false half-'bearing 12 after -removing the main ⁇ bearing cap and the main bearings, a false half-'bearing 12, with the cylindrical portion of the bearing removed, may be slipped into place to support the shaft on fillets 23 during the regrinding operation.
  • two-part fixture 15-16 is ice clamped to false half-bearing 12 by studs A18.
  • Fixture" 16 is provided with VV-ways 17.
  • Universal j oint 21 is slidably mounted in V-ways 17, and operablyj supports carriage 24 in a manner preventing rotation of carriage Y 24 while permitting it to be swung about univeral joint ⁇ 21 and moved longitudinally in V-ways 17.
  • Motor 25 is clamped in carriage 24j and carries cupwheel 26.
  • Car-L riage 24 is provided with handle 28 and feed screw 27 operably bearing on top surface 19 of fixture 15,
  • crankshaft 10 (supported by other main bearings and by fillets 23 bearing on false half-bearing 12) is turned by the starting engine or other means, motor 25 drives cupwheel 26, and the operator releases feed screw 27 until cupwheel 26 comesv into grinding contact with journal 20, fed by gravity.
  • a threepart fixture 31-32-33 is clamped around crankpin journal 30 by bolts 34.
  • Ball-ended screws 35 inclined at 45 Y degrees in fixture 31-33 are held in contact with fillets 23 by spring-pressed ball-ended plungers 36 in fixture 32.
  • crankpin journal 30 spaced about crankpin 30 to locate and hold fixture 31-32-33y concentric therewith while leaving itfree' to rotate about the axis of crankpin journal 30.
  • Yoke 37 is pivoted in fixture 33.
  • V-way block 38 may rock on trunnions 39 in yoke 37.
  • block 38 form a runiversal joint.
  • One end of carriage 40 is slidable in the V-ways of block 38.
  • Grinding spindle 41 is operable in suitable bearings in carriage 40.. ⁇
  • Handle 49 is provided on carriage 40,
  • crankpin journal 30 In regrinding crankpin journal 30, motor 45 drives gear' ⁇ 44 which drives gear 43"on spindle 41 which drives cup-, wheel 42.
  • the operator may unscrew feed's'crew 4'6 un-' til cupwheel 42 comes into grinding contact with journal 30, fed by spring 47, and may use handle 49 to swing Vcarriage 40 about the axis of yoke 37 or move it longitudinally in V-ways of block 38, causing cupwheel 42 to move in a plane parallel to the axis of crankpin journal 30, while crankpin journal 30 is rotating relative to the grinding mechanism until the entire cylindrical surface of journal 30 has been reground precisely cylindrical relative tothe axis of fillets 23.
  • shaft 10 instead of rotating crankpin journal 30 relative to the grinding mechanism, shaft 10 may remain stationary while the entire grinding mechanism is caused to rotate about Y A stood that changes may be made in the construction and rending-d May 24.19.60,'.
  • a mechanism for grinding a crankshaft journal having a cylindrical portion connected by fillets to crank cheeks comprising a fixture operably mounted around said journal, three pairs of ball-ended rods angularly disposed in said fixture and spaced about said journal to bear in said fillets and hold said fixture operably coaxial with said journal, a carriage operably mounted on said fixture, a grinding cupwheel, a motor for driving said cupwheel and mounted on said carriage, and means for feeding said grinding cupwheel into grinding contact with said journal and for moving said cupwheel in a plane tangent to said journal while rotating said mechanism about said journal until the entire journal has been ground precisely and coaxially with respect to its axis.
  • a mechanism for grinding a crankshaft journal having a cylindrical portion connected by fillets to crank cheeks said mechanism lcomprising a fixture operably mounted around said journal, three pairs of ball-ended rods angularly disposed in said fixture and spaced about said journal and bearing in said fillets, one of said pairs being spring-pressed, said pairs-of ball-ended rods holding said fixture operably centered with respect to said journal, a carriage operably mounted on said fixture, a grinding cupwheel, a motor carrying said grinding cupwheel and mounted on said carriage, and means for feeding said cupwheel into grinding contact with said journal and for moving said cupwheel in a plane parallel to the axis of said journal while rotating said mechanism about said journal until the entire journal has been ground coaxially therewith in one operation.
  • a fixture operably centered on said fillets and comprising a grinding cupwheel, a motor for driving said cupwheel, and means for allowing said cupwheel to be fed into grinding contact with said journal and for moving said cupwheel in a plane parallel to the axis of said journal while rotating said fixture continuously more than one revolution about said journal until the entire cylindrical surface of said journal has been reground precisely coaxially therewith.
  • a mechanism for grinding a crankshaft journal having a cylindrical portion connected by fillets to crankcheeks comprising a fixture operably centered on said fillets, a carriage operably mounted on said fixture, a grinding cupwheel, a motor carrying said cupwheel and mounted on said carriage with the cupwheel axis substantially normal to said journal, means for feeding said cupwheel into grinding contact with said journal and for moving said cupwheel in a plane tangent to said journal, and means for continuously rotating said fixture more than one revolution about said journal.
  • a mechanism for regrinding one of said journals without removing the crankshaft from the engine comprising a frame member operably mounted on the undamaged ring areas at the ends of said journal; a carriage operably mounted on said frame memberg.
  • a motor mounted on said carriage; a cupwheel driven by said motor the plane grinding face of said cupwheel being tangent to said journal; means for moving said cupwheel in a plane tangent to said journal; and means for rotating said frame member continuously more than one revolution about said journal until the entire journal has been reground coaxially with said undamaged ring areas.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)
US612451A 1956-09-27 1956-09-27 Crankshaft journal grinder Expired - Lifetime US2937479A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
IT591673D IT591673A (de) 1956-09-27
US612451A US2937479A (en) 1956-09-27 1956-09-27 Crankshaft journal grinder
GB20700/58A GB869240A (en) 1956-09-27 1958-06-27 Improvements in crankshaft grinders
CH6127158A CH364426A (de) 1956-09-27 1958-07-01 Verfahren und Einrichtung zum Nachschleifen von Kurbelwellen

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US612451A US2937479A (en) 1956-09-27 1956-09-27 Crankshaft journal grinder
GB20700/58A GB869240A (en) 1956-09-27 1958-06-27 Improvements in crankshaft grinders
CH6127158A CH364426A (de) 1956-09-27 1958-07-01 Verfahren und Einrichtung zum Nachschleifen von Kurbelwellen

Publications (1)

Publication Number Publication Date
US2937479A true US2937479A (en) 1960-05-24

Family

ID=61012517

Family Applications (1)

Application Number Title Priority Date Filing Date
US612451A Expired - Lifetime US2937479A (en) 1956-09-27 1956-09-27 Crankshaft journal grinder

Country Status (4)

Country Link
US (1) US2937479A (de)
CH (1) CH364426A (de)
GB (1) GB869240A (de)
IT (1) IT591673A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054233A (en) * 1960-07-05 1962-09-18 Golten Sigurd Crankshaft grinders
US3103088A (en) * 1961-12-06 1963-09-10 Golten Sigurd Crankshaft journal grinders
US3165866A (en) * 1962-11-16 1965-01-19 Golten Sigurd Crankshaft main journal regrinding process
DE1225066B (de) * 1961-03-29 1966-09-15 Maschf Augsburg Nuernberg Ag Vorrichtung zum Nachrunden der Kurbelzapfen von Brennkraftmaschinen-Kurbelwellen
CN110788679A (zh) * 2019-12-18 2020-02-14 沈阳多元机电设备有限公司 高温高压汽轮机转子轴颈磨削设备
CN111421422A (zh) * 2020-05-11 2020-07-17 山东理工大学 一种抛光装置及其制造方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1253610B (de) * 1964-02-07 1967-11-02 Knut Golten Schleifapparat fuer Hauptlagerzapfen von Kurbelwellen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523890A (en) * 1922-09-07 1925-01-20 Howard E Parkinson Shaft truing and grinding device
US2130003A (en) * 1938-04-30 1938-09-13 Fuglie Elmer Crankshaft grinder
US2277144A (en) * 1940-01-29 1942-03-24 Storm Mfg Company Inc Grinder
US2574228A (en) * 1948-06-03 1951-11-06 Sawyer Eugene Grinder support attachment for main journals and the like without removal of the shaft
US2599954A (en) * 1951-11-23 1952-06-10 Emmet R Garner Sr Supporting means for bearing grinders
US2755609A (en) * 1953-12-24 1956-07-24 Thelma Sylvester Shaft grinding tool

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1523890A (en) * 1922-09-07 1925-01-20 Howard E Parkinson Shaft truing and grinding device
US2130003A (en) * 1938-04-30 1938-09-13 Fuglie Elmer Crankshaft grinder
US2277144A (en) * 1940-01-29 1942-03-24 Storm Mfg Company Inc Grinder
US2574228A (en) * 1948-06-03 1951-11-06 Sawyer Eugene Grinder support attachment for main journals and the like without removal of the shaft
US2599954A (en) * 1951-11-23 1952-06-10 Emmet R Garner Sr Supporting means for bearing grinders
US2755609A (en) * 1953-12-24 1956-07-24 Thelma Sylvester Shaft grinding tool

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3054233A (en) * 1960-07-05 1962-09-18 Golten Sigurd Crankshaft grinders
DE1225066B (de) * 1961-03-29 1966-09-15 Maschf Augsburg Nuernberg Ag Vorrichtung zum Nachrunden der Kurbelzapfen von Brennkraftmaschinen-Kurbelwellen
US3103088A (en) * 1961-12-06 1963-09-10 Golten Sigurd Crankshaft journal grinders
US3165866A (en) * 1962-11-16 1965-01-19 Golten Sigurd Crankshaft main journal regrinding process
CN110788679A (zh) * 2019-12-18 2020-02-14 沈阳多元机电设备有限公司 高温高压汽轮机转子轴颈磨削设备
CN111421422A (zh) * 2020-05-11 2020-07-17 山东理工大学 一种抛光装置及其制造方法
CN111421422B (zh) * 2020-05-11 2022-08-30 山东理工大学 一种曲轴的抛光方法

Also Published As

Publication number Publication date
IT591673A (de)
GB869240A (en) 1961-05-31
CH364426A (de) 1962-09-15

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