내연 기관 내부 표면 미세 가공에 355nm 자외선 나노초 레이저 적용

내연 기관은 국방, 자동차, 해운, 농업 및 기타 분야에서 일반적으로 사용되는 현재 주류 동력 출력 장치입니다. 최근 몇 년 동안 탄소 정점 및 탄소 중립이라는 "이중 탄소" 전략에 힘입어 배기 가스 규제의 압력 하에서 에너지 절약 및 배출 감소가 내연 기관의 지속 가능한 발전을 위한 주요 개발 경로가 되었습니다. 이 연구는 내연 기관의 왕복 운동 중에 실린더 벽과 피스톤(링)의 기계적 마찰을 줄이면 내연 기관의 동력 성능을 어느 정도 향상시킬 수 있고 배기 가스 배출을 줄인 다음 증가시킬 수 있음을 발견했습니다. 서비스 수명 및 전반적인 경제적 이점은 분명합니다.

The research results show that optimizing the microstructure and morphology of the surface of the cylinder wall enables the cylinder wall to obtain a certain function of storing and transporting lubricating oil, avoiding the solid phase contact between the cylinder wall and the piston ring, thereby improving the relationship between the two. Lubricating properties, which can effectively reduce friction, and this is the derivation of laser surface texture application technology.

The application technology of laser surface texture is to use a high-energy density laser beam to act on the surface of the workpiece to process a specific geometry and a texture with a certain density, width, depth, angle and distribution law, forming storage and transportation of lubricating oil. oil passages and cavities, and ultimately achieve the goal of optimizing the lubricating performance of the components.

The cold working effect of 355nm ultraviolet nanosecond laser can be used to texture the surface of the cylinder wall of the internal combustion engine. Its main advantages are that the wavelength of 355nm is short, the single photon energy is high, the cast iron material of the cylinder wall has a high absorption rate of ultraviolet light, and the heat affected zone during processing is processed. It is small, and the pulse width is narrow, only about 25ns. Such a short action time is not enough for the laser energy to gather on the surface of the cylinder wall, and the thermal effect is low, so as to minimize the influence of the laser energy on the nature of the material.

In addition, laser processing has the characteristics of mature technology, high efficiency and energy saving, and easy control. It is especially suitable for mass production line production. It has significant positive significance for internal combustion engine manufacturers to improve quality and efficiency.