Piston Influence
Release date:
2020-12-15
With the increasingly stringent requirements for the power, economy, environmental protection and reliability of the engine, the piston has developed into a combination of lightweight and high-strength new materials, special-shaped external circular composite profiles, special-shaped pin holes, etc.
With the increasingly stringent requirements for the power, economy, environmental protection and reliability of the engine, the piston has developed into a combination of lightweight and high-strength new materials, special-shaped external circular composite profiles, special-shaped pin holes, etc. This new technology is a high-tech product to ensure the heat resistance, wear resistance, smooth guidance and good sealing function of the piston, reduce the friction power loss of the engine, and reduce fuel consumption, noise and emissions. In order to meet the above functional requirements, the outer circle of the piston is usually designed as a special-shaped outer circle (convex ellipse), that is, the cross section perpendicular to the axis of the piston is an ellipse or a modified ellipse, and the ellipticity changes according to a certain law along the axis direction. (As shown in Figure 1), the ovality accuracy is 0.005mm; the outer contour of the longitudinal section of the piston is a fitting curve of a high-order function, and the contour accuracy is 0.005~0.01mm; in order to improve the bearing capacity of the piston, to improve the engine's lift Power, usually the pin hole of the high-load piston is designed as a micro-inner cone type or a positive stress surface type (special-shaped pin hole), the dimensional accuracy of the pin hole reaches IT4 level, and the contour accuracy is 0.003mm.
As a typical key auto parts, pistons have strong technological characteristics in machining. The domestic piston manufacturing industry usually consists of general-purpose machine tools and special equipment combined with the characteristics of piston technology to form a machining production line. Therefore, special equipment has become the key equipment for piston cutting, and its function and accuracy will directly affect the quality indicators of the key characteristics of the final product.
WeChat Official Account
Henan Zhongyuan Piston Co., Ltd.
Phone:+86-0391-8161717
Fax:+86-0391-8162166
Email:zhongyuan@zypiston.com
Website:http://www.zypiston.com
Address: No. 288, Wutong South Road, Mengzhou City, Henan Province, China