Special-shaped inner hole honing cylinder sleeve and manufacturing method thereof

A cylinder liner and inner hole technology is applied in the field of special-shaped inner hole honing cylinder liner and its preparation, which can solve the problems of shortening the life of the cylinder liner, deformation of the inner hole of the cylinder liner, increasing oil consumption, etc. cylinder, the effect of reducing heat

Inactive Publication Date: 2020-08-28
GKN ZHONGYUAN CYLINDER LINER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the shape processing of the inner hole of the cylinder liner is mainly based on the honing process. The current inner hole of the cylinder liner is in the shape of a straight cylinder. In the non-working state, the inner hole shapes of the working area, non-working area and different wall thickness areas of

Method used

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  • Special-shaped inner hole honing cylinder sleeve and manufacturing method thereof

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Embodiment 1

[0034] Such as figure 1 As shown, the present invention provides a special-shaped inner hole honing cylinder liner, including a cylinder liner body. The material of the cylinder liner body is pearlitic cast iron, and the cylinder liner body is provided with an inner hole. One end of the cylinder liner body is The big end 1 and the other end is the small end 2. The diameter of the outer circle of the big end 1 is larger than that of the small end 2. The shape of the inner hole depends on the actual temperature of the different sections of the cylinder liner at the working temperature. It is processed into two sections with different shapes, so that the inner hole of the cylinder liner is in the shape of a straight cylinder as a whole under working conditions. The actual temperature of the section corresponding to the big end 1 under working conditions is 180-240°C. Section 3, the diameter of the inner hole of the straight cylindrical section 3 is D=132±0.01mm, the length L1 is ...

Embodiment 2

[0037] Such as figure 1 As shown, the present invention also provides a kind of preparation method of special-shaped inner hole honing cylinder liner, comprising the following steps:

[0038] 61) Cylinder liner blank: the cylinder liner casting or formed steel pipe is prepared by wet coating centrifugal casting process, and the material is pearlitic cast iron;

[0039] 62) Machining: Cutting and preliminary honing of the cylinder liner blank, the specific process includes rough turning - rough boring inner hole - repairing - fine boring inner hole - semi-finishing outer circle - rough grinding inner hole - finishing turning Outer circle - semi-fine grinding;

[0040] 63) Fine grinding: firstly, according to the mesh parameters of the inner hole of the cylinder liner, sand bars are selected, and the honing parameters are input into the numerical control honing equipment, and the inner hole wall of the cylinder liner obtained in step 62) is finely honed by the numerical control h...

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Abstract

The invention relates to the technical field of cylinder sleeve inner hole machining, in particular to a special-shaped inner hole honing cylinder sleeve and a manufacturing method thereof. One end ofa special-shaped inner hole honing cylinder sleeve body is a large end, the other end of the special-shaped inner hole honing cylinder sleeve body is a small end, and the shape of an inner hole is machined into different sections according to different actual temperatures of different sections of the cylinder sleeve at the working temperature, the inner hole of the cylinder sleeve is wholly cylindrical under the working conditions, the section corresponding to the large end is in a straight cylinder shape, the other sections are in conical cylinder shapes or arc cylinder shapes, the sectionsare in smooth transition connection, the inner hole diameter of the large end is smaller than that of the small end, the inner hole diameter of the straight cylinder section is smaller than the minimum inner hole diameter of the other sections, and the inner hole diameters of the other sections are gradually increased from the large end to the small end of the cylinder sleeve. According to the special-shaped inner hole honing cylinder sleeve, the shape of the inner hole of the cylinder sleeve is changed by analyzing the temperature of the inner hole of the cylinder sleeve in the working state,the friction coefficient is reduced, the exhaust emission is reduced, the use performance of the air cylinder sleeve is improved, and the service life of the air cylinder sleeve is prolonged.

Description

technical field [0001] The invention belongs to the technical field of cylinder liner inner hole processing, and in particular relates to a special-shaped inner hole honing cylinder liner and a preparation method thereof. Background technique [0002] The cylinder liner is one of the key parts of the engine. The inner hole of the cylinder liner adopts a cylindrical structure. When it is working, it is placed in the cylinder block hole of the engine body. The upper end is pressed and fixed by the cylinder head, and the piston is in the inner hole of the cylinder liner. Therefore, the shape of the inner hole of the cylinder liner directly affects the loss of friction work, oil consumption, exhaust emission and service life of the engine. At present, the inner hole of the cylinder liner is straight in the non-working state. In the working state, the cylinder liner will be heated and deformed due to the workmanship. The temperature of different regions will change the shape of t...

Claims

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Application Information

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IPC IPC(8): F02F1/00B24B33/02
CPCB24B33/02F02F1/004
Inventor 王中营王海军张冲冲张静静陈艳丽行心慧牛志超闫涛
Owner GKN ZHONGYUAN CYLINDER LINER CO LTD
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