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第二讲 粘接维修技术和工艺 一、粘接技术的特点及设备粘接维修的应用范围 1.粘接技术的特点 能把各种不同类别的材料粘接起来,例如铜与铝这类不易焊的金属,玻璃陶瓷、橡胶织物这些不能焊的材料都可以粘接;粘接可以有效消除接合面的应力集中,增强连接件的疲劳寿命。因为胶粘剂是在整个胶接面上连续分布的,所以负荷比较均匀地分布在整个粘接面上,而不是像焊接、铆接那样应力集中在少数几个点上;因为胶粘剂是高分子材料,所以粘接处同时具有密 3.粘接维修的技术关键及粘接工艺 假若把粘接体系分成软件和硬件两部分的话,粘接的三大要素即合理的接头设计、正确的胶粘剂选择、严谨的粘接工艺,就是其软件;而胶粘剂和粘接设备等物质条件就是其硬件。 (1)接头设计 ①结构粘接中,粘接接头是要传递力的,所以必须首先弄清接头受力的类型,即拉伸力、剪切力、剥离力、劈裂力4种力中的哪一种?从粘接的特性来看,胶粘接头承受拉伸力的能力最强,
Lecture 2, adhesive repair technology and process First, the characteristics of adhesive technology and equipment, adhesive repair applications 1. The characteristics of adhesive technology can bond a variety of different types of materials, such as copper and aluminum is not easy Weld metal, glass ceramic, rubber fabric can not weld these materials can be bonded; bonding can effectively eliminate the stress concentration of the joint surface and enhance the fatigue life of the connector. Because the adhesive is continuously distributed over the entire adhesive surface, the load is distributed more evenly over the entire adhesive surface rather than at a few points such as welding and riveting. Because the adhesive is a polymer material, Bonding at the same time with the dense 3. Adhesive repair technology and bonding process If the bonding system is divided into two parts of software and hardware, then the three elements of bonding that is a reasonable connector design, the right choice of adhesive, rigorous Bonding process, is its software; and adhesives and bonding equipment and other material conditions is its hardware. (1) joint design ① structural bonding, adhesive joints are to pass the force, it must first find out the type of joint force, tensile strength, shear force, peel force, split force 4 kinds of force Which one? From the bonding properties, the ability of adhesive joints to withstand the strongest tensile force,