Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
  • F02F7/00—Casings, e.g. crankcases or frames
  • F02F7/0021—Construction
• • 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
  • B24B33/00—Honing machines or devices; Accessories therefor
  • B24B33/02—Honing machines or devices; Accessories therefor designed for working internal surfaces of revolution, e.g. of cylindrical or conical shapes
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
  • F02B75/00—Other engines
  • F02B75/02—Engines characterised by their cycles, e.g. six-stroke
  • F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
  • F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
  • F02F1/00—Cylinders; Cylinder heads 
  • F02F1/24—Cylinder heads
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
  • F02F7/00—Casings, e.g. crankcases or frames
  • F02F7/0002—Cylinder arrangements
  • F02F7/0007—Crankcases of engines with cylinders in line
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
  • F02F7/00—Casings, e.g. crankcases or frames
  • F02F7/0002—Cylinder arrangements
  • F02F7/0012—Crankcases of V-engines
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
  • F02F7/00—Casings, e.g. crankcases or frames
  • F02F7/0043—Arrangements of mechanical drive elements
  • F02F7/0053—Crankshaft bearings fitted in the crankcase
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
  • F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
  • F05C2201/00—Metals
  • F05C2201/02—Light metals
  • F05C2201/021—Aluminium

Definitions

• the invention relates to a machine housing having a bore for an internal combustion engine with the features of the preamble of patent claim 1.
• the grinding device is suitable for machining a plurality of crankshaft bearing bores for rolling bearings of a crankshaft bearing of a crankcase.
• the grinding device has a rotationally drivable tool shaft which carries a plurality of axially spaced-apart machining units whose number corresponds to the number of crankshaft bearing bores present on the crankcase.
• Each machining unit arranged on the tool shaft has at least one grinding wheel.
• An axial distance between two grinding wheels of two adjacent processing units corresponds to a distance between two adjacent crankshaft bearing bores.
• German Patent Application DE 102009051 285 A1 discloses a method and a honing tool for producing at least one bearing bore and an internal combustion engine with at least one honed bearing bore. Disclosed is inter alia a method for producing at least one bearing bore in the internal combustion engine, in particular for a crankshaft or a camshaft, by means of a honing tool, which is moved axially parallel to a bore axis of the bearing bore and about a tool axis.
• a honing tool for producing at least one bearing bore is disclosed.
• the honing tool is mounted on its side facing away from the tool drive in an abutment which is arranged outside of the internal combustion engine.
• the method is characterized by at least one power honing operation, wherein an honing of at least 0.5 mm is produced using a honing tool by honing the hole relative to the diameter of the hole, wherein the power honing operation is performed as an aligning honing operation such that the power honing operation results in a displacement of the receipt - tion axis in the direction of the target position.
• a workpiece holder for the workpiece is provided and further an abutment on the honing spindle side facing away from the workpiece holder for rotatable mounting of the honing tool, wherein the anvil preferably with the lifting movement of the honing tool mitbewegbar with the honing tool , that is, in the axial direction is variable in position.
• a guide bore integral with the crankcase abutment, so to speak, a guide bore, the tool for the machining of the bore in the machine housing, for example, a crankshaft bearing bore, are performed.
• the cycle time of processing can be reduced by up to 25%, with excellent coaxiality of the finished bore.
• the anvil force or form and / or stoffschlüsslg be connected depending on the embodiment with the machine housing.
• the anvil according to claim 4 is an extension of a bore portion, for example a crankshaft bearing.
• the counter bearing according to claim 5 serves as a bore for a Radlalwellendichtring. So there is a best possible KoaxiaItician between bearing and Radlalwellendichtring what positive effect on the long-term tightness effect
• the inner diameter according to claim 6 of the thrust bearing is made smaller than the bore diameter of the bore sections.
• the method according to the invention can be used not only for a crankshaft bearing track but also, for example, for a camshaft bearing track and / or an eccentric shaft bearing
• Flg. 1 shows a view of a machine housing according to the invention with a bore for an internal combustion engine.
• Fig. 1 shows a view of an inventive machine housing 1 for an internal combustion engine.
• the machine housing 1 has a bore, which in the present exemplary embodiment is formed by five spaced-apart bore sections 2, 2 '.
• the engine housing 1 for example, a crankcase with five Bore sections 2, 2 'formed by crankshaft bearings.
• the view of the crankcase is made from below on the crankshaft bearing lane of the crankshaft, with an oil pan, which would prevent the view of the crankshaft bearing lane, is not shown.
• the machine housing 1 may also be a cylinder head.
• the machining of bearing bores for balance shafts in a crankcase or bearing bores for camshafts and / or eccentric widths is also possible in a cylinder head.
• a rod-shaped, rotating and cutting tool 3 is provided, which on the one hand of the machine housing 1 by an axial displacement in the Bohrungsabschnttten 2, 2 'formed hole can be introduced.
• the cutting tool 3 may be, for example, a fine boring tool or a grinding tool or a honing tool.
• the tool 3 has for each bore section 2, 2' its own non-numbered cutting area, which is located in the illustrated position in each case in a crankshaft bearing.
• an abutment 4 for the tool is provided on the side of the bore facing away from a drive 6 of the tool 3, for the radial support of the tool 3.
• the abutment is 4 integrally formed with the machine housing 1
• Weather has the tool 3 shown in Figure 1 on the opposite side of the drive a guide pin 5, which is used to guide the
• the anvil 4 is manufactured in one piece with the machine housing in a casting process.
• the anvil 4 may also be non-positively or positively connected to the machine housing.
• the anvil 4 can be screwed on and removed after the fine machining or it can be welded or soldered.
• the anvil 4 is an extension of a bore portion 2, 2 ', in the present embodiment, a crankshaft bearing. This embodiment reduces the manufacturing costs again.
• the anvil 4 can also serve as a bore for a Radialwellendlchtring. This has the advantage that the Koaxialtttechnik between radial shaft seal and crankshaft axis is very accurate, so that the greatest possible permanent density of the radial shaft sealing ring is guaranteed.
• the inner diameter of the anvil 4 is smaller than a bore diameter of the bore sections 2, 2 '.
• the attachment of a guide option is proposed in the machine housing 1 for the tool 3 for machining the crankshaft bearing track with a defined guidance of the tool 3.
• the embodiment according to the invention makes it possible to dispense with a separate counter bearing 4 located outside the machine housing 1.
• the tool 3 for machining the hole in the machine housing 1 are performed. So is a different over the life of the tool 3 Dodge the tool 3, for example, by different materials, no longer possible.
• the cycle time of machining can be reduced by up to 25%, with excellent coaxiality of the machined bore.

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Publications (1)

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• 2012
  • 2012-03-21 DE DE102012204483A patent/DE102012204483A1/de not_active Withdrawn
• 2013
  • 2013-03-14 WO PCT/EP2013/055220 patent/WO2013139674A1/de active Application Filing
  • 2013-03-14 CN CN201380009140.9A patent/CN104114321A/zh active Pending
  • 2013-03-14 EP EP13709124.5A patent/EP2828035A1/de not_active Withdrawn
• 2014
  • 2014-09-18 US US14/489,709 patent/US9303585B2/en active Active

Patent Citations (1)

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