A method for machining cylinder bores

A processing method and cylinder hole technology, applied in the field of cylinder hole processing, can solve the problems of wear, affecting the performance and life of the engine, poor lubrication and friction reduction effect, etc. Effect

Inactive Publication Date: 2015-11-18
JIANGSU UNIV
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Problems solved by technology

The patent does not propose the surface requirements of the cylinder bore before machining, but in fact it is very critical, and the selection of the laser machining position in this patent does not consider the wear distribution of the cylinder bore surface, which is not targeted enough
In addition, the size of the microgroove structure in this patent is too large, so there is no microscopic lubrication effect, and the microgroove structure is difficult to process, and the corresponding lubrication and friction reduction effect is not better than that of the concave cavity
[0004] The wear conditions of the engine cylinder holes are different, and some places are prone to wear and affect the performance and life of the engine.

Method used

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  • A method for machining cylinder bores

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Embodiment Construction

[0014] The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0015] figure 1 It is a schematic diagram of cutting and flattening the cylinder bore 1. After the cylinder bore 1 is cut, it is divided into two parts, and the texture areas on the two parts are the same.

[0016] The pretreatment is obtained by mechanical honing process, and the surface morphology parameters after pretreatment are required: Rpk≤0.1μm, Rk≤0.15μm, Rvk≤0.3μm, Mr185%.

[0017] Surface texturing in the cylinder bore 1, the target area is the top dead center zone 7 and the piston skirt friction zone 8, the top dead center zone 7 covers the top dead center of the cylinder bore 1, and the piston skirt friction zone 8 covers the cylinder The contact area between the hole 1 and the piston during relative motion; the surface texture parameters of the above two areas are different, the cavity diameter, cavity dep...

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Abstract

The invention provides a cylinder bore machining method. The cylinder bore machining method comprises the steps of pretreatment, surface texture formation, aftertreatment and detection. A surface before machining is obtained through the pretreatment; texture features are machined on the surface of a cylinder bore through the surface texture formation; burrs on the surface of the cylinder bore are removed through the aftertreatment; quality test is finished through the detection process. The cylinder bore machining method has the advantages that the tribological performance of a cylinder bore-piston ring friction pair is remarkably improved, the abrasive resistance of the surface of the cylinder bore is enhanced, the fuel oil consumption is lowered by 1-3% for an engine, and the engine oil consumption is lowered by 30-50%.

Description

technical field [0001] The invention relates to a cylinder hole processing method, which belongs to the field of machinery manufacturing and automobiles. Background technique [0002] The cylinder bore-piston ring friction pair is one of the typical friction pairs in the engine, which determines the service performance and life of the engine, and the texture structure of the cylinder bore surface is directly related to the emission performance of the engine. At present, the machining of engine cylinder bores generally adopts the mechanical honing process, which improves the lubrication condition between the cylinder bore and the piston ring friction pair to a certain extent. In recent years, with the development of high-energy technology, cylinder bore laser texturing technology has emerged, which has the advantages of short processing time, small thermal stress, and good controllability. [0003] CN200510116292 discloses a laser honing tool for processing micro-groove stru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P15/00
Inventor 符永宏符昊康正阳华希俊葛汗青汤伯虎尹必峰
Owner JIANGSU UNIV
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