Method and apparatus for finish machining crankshaft bearing borehole

A technology of crankshaft bearings and crankcases, applied in metal processing equipment, manufacturing tools, honing tools, etc., can solve the problems of power influence, emission and engine noise influence

Inactive Publication Date: 2011-11-16
NAGEL MASCHEN UND WERKZEUGFAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has an effect on power and through the combustion process also has an effect on emissions and engine noise

Method used

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  • Method and apparatus for finish machining crankshaft bearing borehole
  • Method and apparatus for finish machining crankshaft bearing borehole
  • Method and apparatus for finish machining crankshaft bearing borehole

Examples

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Embodiment Construction

[0049] exist figure 1 shows a schematic side view of a device designed as a horizontal honing machine for finishing crankshaft bearing bores in a crankcase of a cylinder block. The honing machine is set up for complete finishing of the crankshaft bearing bore immediately after assembly of the parts of the engine block forming the crankshaft bearing bore. The honing machine is designed in such a way that by means of the honing manufacturing method it is possible, on the one hand, to adjust the correct position of the bore axis of the crankshaft bearing bore relative to a fixed reference system of the workpiece, and on the other hand to achieve (Lagerstelle) surface structure tolerances.

[0050] Mounted on a machine tool 102 of a honing machine 100 is a horizontally movable spindle slide 104 which has a headstock 106 in which a honing spindle 110 of the honing machine with a horizontal spindle center line 111 is rotatably mounted . An electronic rotary drive 107 for spindle ...

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PUM

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Abstract

In a method for finishing a borehole in a workpiece, particularly for finishing a crankshaft bearing borehole in a cylinder crankcase of an internal combustion engine, a machined borehole is generated based on a prepared borehole, the machined hole has a settable theoretical size, a settable theoretical structure of the inner surface of the borehole and a settable theoretical position of the borehole axis. The method is characterized in at least one high efficient honing operation. A degradation of 0.5 millimeter is generated under the use of a honing tool by the honing of the borehole relative to the diameter of the borehole during the high efficient honing operation. The high efficient honing operation is executed as honing operation such that a shifting of the borehole axis takes place in the direction of the target position by the engine power honing operation.

Description

technical field [0001] The invention relates to a method according to the preamble of claim 1 for finishing bores in workpieces, in particular for finishing crankshaft bearing bores in a crankcase of a cylinder block of an internal combustion engine. Furthermore, the invention relates to a device suitable for carrying out the method. Background technique [0002] Cylinder block crankcases (ZKG), which are often also referred to simply as crankcases or engine blocks, are integral components of internal combustion or gasoline engines, which are used, for example, in passenger cars or trucks, aircraft, ships or stationary installations. The most widely used construction type is the multi-cylinder engine, the pistons of which are connected by connecting rods to a rotating crankshaft which transmits the forces generated by the engine to wheels, boat propellers, propeller propellers, generators or similar objects. [0003] The crankshaft is located below the cylinders in an in-li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24B33/02B24B33/10
CPCB24B33/02B24B33/084
Inventor B·纳格M·马耶
Owner NAGEL MASCHEN UND WERKZEUGFAB
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