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

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...

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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 the cylinder liner are the same. In the working state, the inner hole of the cylinder liner will be deformed, resulting in differences in the shape of the inner hole in each area, resulting in increased friction work, increased heat loss, increased oil consumption, reduced life of the cylinder liner, and increased emissions.

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