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Cylinder bore and method for producing the same

A manufacturing method and cylinder bore technology, applied to cylinders, cylinder heads, engine components, etc., can solve problems such as deformation and product quality degradation, and achieve the effects of preventing cracks, achieving product quality, and achieving durability and reliability

Inactive Publication Date: 2013-06-05
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the above method is applied to components such as cylinder bores that require high roundness, deformation will occur, resulting in a decrease in the quality of the product

Method used

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  • Cylinder bore and method for producing the same
  • Cylinder bore and method for producing the same
  • Cylinder bore and method for producing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] 1. Embodiment 1 (evaluation of surface roughness control)

[0039] In Example 1, evaluation of surface roughness control was performed. In the boring process, a plurality of cylinder bores with approximately the same surface roughness were obtained, and in the plastic working of the cylinder bores, the amount of polishing was changed, and the surface roughness Ra (μm) of the cylinder bores before and after plastic working was studied. The relationship between the amount of polishing. The result is in image 3 shown in .

[0040] It should be noted that, in Example 1, only one cylinder bore is subjected to plastic working for each cylinder block. image 3 In , the polishing amount (μm) is defined as the difference between the diameter of the cylinder bore before plastic working and the tool diameter of the polishing tool 100 (the length from the center of the mandrel 101 to the outermost peripheral surface of the roller 103 ). In the evaluation of surface roughness...

Embodiment 2

[0044] In Example 2, evaluation of cylindricity was performed. In the boring process, a cylinder block having a cylinder bore with approximately the same surface roughness was obtained. In the plastic working of the cylinder bore, the amount of polishing was changed to obtain the cylindricity (μm) and The relationship between the amount of polishing (μm) and the evaluation of cylindricity was carried out. It should be noted that the polishing amount is defined as the maximum value of the difference between the bore diameter of the cylinder bore before plastic working and the bore diameter of the cylinder bore after plastic working. like Figure 5 As shown, the cylindricity is defined as the difference between the maximum value R1 and the minimum value R2 of the bore diameter of the cylinder bore after plastic working.

[0045] Specifically, the cylindricity was evaluated for the following forms: the form for which only one cylinder bore was plastically worked for each cylind...

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Abstract

The present invention provides a method for manufacturing a cylinder bore having a sliding surface that slides with a mating member. The cylinder bore of the present invention is characterized in that the cast body is formed on the cast body by boring processing. For the sliding surface, after the boring process, plastic processing is performed on the sliding surface, so as to crush the air pockets on the sliding surface and its vicinity, and at the same time make the sliding surface smooth. After the plastic processing, An anti-seizure film is formed on the sliding surface.

Description

technical field [0001] The present invention relates to a cylinder bore (Cylinder Bore) used in the engine field and a manufacturing method thereof, in particular to the improvement of a sliding surface (folding surface). Background technique [0002] The cylinder bore has a sliding surface that slides against the piston with an oil film interposed therebetween. For the sliding surface, for example, for the main purpose of securing an oil film to improve seizing resistance and wear resistance, groove shapes such as Cross Hach are formed by honing, and a coating is formed on the surface of the groove shape. Furthermore, the technique of forming a plated film as a coating film using a wet plating method such as a Ni—SiC plating method in which SiC particles are dispersed in Ni metal has been put into practical use. [0003] Various improvements have been made to such sliding surfaces. For example, in the technique of JP-A-2005-69008, a DLC film (Diamond-Like Carbon) having e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02F1/00
CPCB23P9/02F02F1/20Y10T29/49231
Inventor 小林幸司
Owner HONDA MOTOR CO LTD
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