Method for increasing internal surface wearability of engine cylinder body and cylinder sleeve

A technology for the engine block and inner surface, which is applied in the direction of engine components, cylinders, mechanical equipment, etc., can solve the problems of shallow hardened layer, limited range of surface wear resistance, limited range of wear resistance, etc., and achieve the goal of reducing the friction coefficient Effect

Inactive Publication Date: 2003-08-27
武汉飞能达激光技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Existing surface strengthening technologies, such as laser quenching, plasma quenching, electroplating hard chrome, chemical plating composite materials and other technologies mentioned above, can greatly improve the hardness of the inner surface of the engine block or cylinder liner material, but A stable lubricating oil film cannot be produced between the friction pairs, so there is a limit to improving the surface wear resistance of the cylinder block or cylinder liner
On th

Method used

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  • Method for increasing internal surface wearability of engine cylinder body and cylinder sleeve
  • Method for increasing internal surface wearability of engine cylinder body and cylinder sleeve
  • Method for increasing internal surface wearability of engine cylinder body and cylinder sleeve

Examples

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Example Embodiment

[0021] Example 1

[0022] The engine block or liner is made of gray cast iron. After the conventional casting process and machining (including boring, honing the inner hole, etc.) steps, the inner diameter of the cylinder block or liner is about 100 microns from the final product size . Blacken the inner wall of the cylinder block or cylinder liner to improve the laser absorption rate of the material surface. Then, use CO 2The laser processing machine performs laser hardening on the inner wall of the cylinder block or cylinder liner. The process parameters of laser quenching are: laser power 1.5kw, spot diameter 4mm, scanning speed 45mm / s, and laser quenching adopts cross-network distribution. The laser quenching area is: when the cylinder block or liner moves, the stroke area from the top dead center to the bottom dead center of the piston is included. After laser quenching, honing the quenched cylinder liner, so that the inner diameter of the cylinder block or liner after honing...

Example Embodiment

[0024] Example 2

[0025] The engine block or cylinder liner is made of alloy cast iron. After the conventional casting process and machining steps, the inner diameter of the cylinder block or liner is about 100 microns away from the final product size. Blacken the inner wall of the cylinder block or cylinder liner to improve the laser absorption rate of the material surface. Then, use CO 2 Laser heat treatment equipment performs laser hardening on the inner wall of the cylinder block or cylinder liner. The process parameters of laser quenching are: laser power 1.5kw, spot diameter 4mm, scanning speed 45mm / s, laser quenching method is spiral pattern. The laser quenching area is: when the cylinder block or liner moves, the stroke area from the top dead center to the bottom dead center of the piston is included. After laser quenching, the quenched cylinder liner is honed, so that the inner diameter of the cylinder block or liner after honing is 10-20 microns smaller than the finishe...

Example Embodiment

[0027] Example 3

[0028] The material, processing method and process of the alloy cast iron are the same as in Example 2. The laser quenching process parameters and methods are also the same as in Example 2. After laser quenching, the quenched cylinder liner is honed, so that the inner diameter of the cylinder block or liner after honing is 10-20 microns smaller than the finished size. Then laser etching is performed. The arc length a of the laser-etched spiral intermittent stripes is 20mm, the distance b between adjacent stripes is 10mm, the spiral pitch h is 2mm, and the etching depth is 0.08mm. After laser etching, the cylinder block or the inner wall of the cylinder liner is finely ground to the size of the finished cylinder liner or cylinder block with a honing machine, and it can be used as a finished machine.

[0029] Bench test use effect: If the wear resistance (or service life) of the alloy cast iron cylinder liner without any treatment is 1 unit, the engine bench test ...

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Abstract

The invention discloses a method for enhancing the wearability in the cylinder of engine and the inner surface of the cylinder cover. The steps are: 1) carries on consolidating treagment to the surface of cylinder and the inner surface of the cover within section between the two stop points of valve; 2) uses laser etching method to etch tiny slots on the cylinder and the inner surface of the cover regularly; 3) grinds the cylinder and the surface of the cover subtly in order to eliminate the remnants around the slots. In the invention, the cylinder and the surface of the cover has high rigidity and oil storing slots, the friction factor is decreased greatly.

Description

technical field [0001] The invention belongs to the technical field of laser processing, and in particular relates to a method for improving the wear resistance of the inner surfaces of engine cylinder blocks and cylinder sleeves. Background technique [0002] Wear is the main cause of engine block or cylinder liner failure. How to properly treat the inner surface of the cylinder block or cylinder liner to greatly improve its wear resistance is the key factor to improve the life of the engine. At present, there are two main types of surface treatment methods for cylinder liners: ① Improve the hardness and wear resistance of the inner surface of the cylinder liner. The process methods used include hard chrome plating, electroless composite plating, laser surface quenching, plasma surface quenching, etc. The aluminum cylinder block also includes electroplating composite materials and anodic oxidation technology; ②Reduce the friction coefficient between the friction pair of th...

Claims

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Application Information

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IPC IPC(8): B23K26/364B24B33/02C21D1/09F16J10/04
Inventor 曾晓雁宋全胜胡乾午
Owner 武汉飞能达激光技术有限公司
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