英制系列紧固件扭矩拉伸紧固

[中文适用范围]： 本SAE信息报告作为咨询指南提供。建议根据个人应用酌情使用。内容尽可能准确呈现，但其应用责任由用户承担。文档涵盖了扭矩-张力关系中的变量：摩擦、材料、温度、湿度、紧固件和配合件的表面处理、表面以及使用的扳手类型。此外，本文档还描述了实现正确紧固件接头紧固所需的扭矩管理。紧固件的螺纹配合必须符合外部螺纹的2A级和内部螺纹的2B级。 [外文原描述]： This SAE Information Report is provided as an advisory guide and is not intended to be made a procurement requirement. Individual application discretion is recommended. The content has been presented as accurately as possible, but responsibility for its application lies with the user. The document covers a number of the variables in the torque-tension relationship: friction, materials, temperature, humidity, fastener and mating part finishes, surfaces, and the kind of tightening tools or equipment used. With an understanding of the variables to be considered, several methods to determine and tighten fasteners using the torque-tension relationship are identified. This guide is limited in application to fasteners with ISO-metric or UN series threads. Other thread types, such as self-tapping or thread forming, may apply to some aspects of this standard but are not specifically covered. The procedures described in this document are based on general factors for the determination of the torque-tension relationship for the use of end users. For critical joint design, the assembly torque values should be determined by experimentation using the exact assembly components.