导弹雨蚀头与陶瓷锥壳粘接技术

Bonding Technology between Missile Erosion Head and Ceramic Cone Shell

陶瓷天线罩与雨蚀头采用耐高温有机硅胶黏剂连接,在以往例行实验时雨蚀头发生松脱现象,无法满足天线罩的气密性功能要求。但是当胶黏剂涂抹过多,热强度试验则出现陶瓷罩体破裂现象,这种破裂现象是由胶黏剂体积膨胀力引起的。提出了一种胶黏剂体积膨胀力方法;该方法通过瞬态热试验测试雨蚀头直杆温度,由于胶黏剂很薄(2 mm),宏观上认为雨蚀头直杆的温度为胶黏剂温度。通过典型试验建立胶黏剂温度与其体积膨胀力的数学关系式,以均布压力形式施加到陶瓷天线罩锥壳孔内进行锥壳的热应力分析。改变胶粘区域范围进行多次计算,得到锥壳一系列孔边环向应力值,以确定胶粘最佳范围。结果表明按照最佳胶粘范围粘贴的天线罩,在飞行试验中雨蚀头没有发生松脱现象,陶瓷罩体也没有发生破裂现象,可以为导弹的设计的工艺改进提供理论指导。

Ceramic radome and rain erosion head were bound together with high temperature resistant silicone,when the adhesive glue is insufficient,the rain erosion head is easy to loose,and it couldn’t meet the air tightness of the radome requirements,but when the amount of adhesive glue was excessive,ceramic cover would be ruptured in thermal strength test.Both of these phenomena are caused by improper use of adhesive glue in bonding process.In this paper,based on the physical experiment and numerical simulation,a method to determine the suitable dosage of adhesive glue was advanced.In this method,the temperature of the rain erosion head bar was obtained through transient thermal test.Then the mathematical relationship between the adhesive temperature and its volumetric expansion force is established through a typical test,and then the simulation model of the ceramic radome is established,and the thermal stress of the cone shell is analyzed by applying the uniform pressure in the bonding area to the shell hole of the ceramic radome.Finally,the parametric modeling and simulation of the adhesive region were employed to establish the change rule between the adhesive region and the stress value of cone-shell hole edge,and then the optimal adhesive region is determined.The flight test practice shows that the antenna cover which was pasted according to the optimal adhesive range has no loose phenomenon and the ceramic cover has no rupture phenomenon,thus it could be concluded that the method in this paper would provide theoretical guidance for the design of the missile.