Fastener_Torque_and_Fastening_(紧固件 扭矩问题)幻灯片.ppt

Zhang Haoyi Feb 28, 2006 * Zhang Haoyi July 05, 2005 ABC about Fastener, Torque and Fastening on-site Issues 紧固件,扭矩和现场问题基础 Fastener Introduction Every year we hear about issues related to the design or assembly of fastened joints. These issues bring us much trouble in on-site assembly, product liability, vehicle durability, even redesign. Fastener attention peaks when a catastrophic bolted joint failure occurs. This presentation is designed to raise the awareness of the need for proper joint design and validation. 每年我们都可以听说与紧固连接件的设计和安装相关的问题。这些问题给我们的零件安装，产品可靠性，整车耐久性带来了许多麻烦，甚至导致重新设计。当一个灾难性的螺栓连接失效发生时，紧固件就受到高度关注。这个报告主要用来提高工程师的意识，以进行正确的连接设计和验证。 Fastener Introduction Advantages of Proper Joint Design 正确连接件设计的好处 Customer Satisfaction 客户满意 Mass Reduction 重量减少 Improve Reliability 可靠性提高 Reduce Costs (direct and indirect) 成本减少（直接和间接） Government Regulation Compliance 符合政府法规 Complexity Reduction 复杂程度减低 Eliminate the need for “fixes” 减除了“安装”的需要 Fastener Introduction Why we need fasteners? 为什么我们需要紧固件? Joint different materials together 将不同的材料连接起来 Act as a heavy spring to keep components from slipping relative to one another 类似一个大弹簧，连接零部件以避免相互滑动 Act as a pivot/sheer point for the attachment of brackets, tethers, belts 在支架，绳，带连接中，类似一个支点/转向点 Connect hydraulic and other fluid lines to their respective components 将液压的和其他液体管线连接到他们各自的零部件上 Allow for disassembly 允许拆卸 Fastener Introduction What must a fastener do？ 紧固件必须做些什么？ Survive Assembly 起到连接的效果 Provide clamp load (or other joint performance criteria) to resist any type of joint failure 提供拉紧力（或者其他连接性能标准）来防止任何性质的连接失效 Incorporate specific corrosion protection and lubrication characteristics 具备具体的腐蚀保护和润滑特性 Fastener Categories According to different usage, shape and material, Fastener can be divided into following categories briefly： 根据使用，外形和材料的不同，紧固件可以被大致分为以下几种类型： Bolts and Screws Bolts Machine Thread Screws Tapping Screws Fastener I