Dynamic Analysis And Optimization On The Bonding Structure For The Led Automatic Die-bonder

LED industry of China has rapidly developed these years, and the annual consumption has reached more than one hundred billion chips. But the level of domestic manufacturing equipment for LED is far behind, what's more, an implementation of high-end equipment embargo was set to china. Therefore, the localization of high-quality LED manufacturing equipment must be resolved. LED die-bonder is one of the packaging equipment for the LED industry, the process efficiency and quality is a measure of its performance parameters. So it's necessary to conduct the dynamic analysis and optimization for the Die bond structure to improve the response speed and to shorten the settling time.First, kinetic theory of elastic linkage was used to analysis the die bond structure, and the factors of vibration characteristics explored.Second, modal analysis of institution was conducted, and showed that the ann and connecting rod component are the most significant impact on system operation.Third, by comparison, the method of rigid-flexible coupling multi-body dynamic analysis was selected, transient dynamic analysis and the principle of one single variable was used, the result showed that the damping of rotation joint effects the vibration characteristics, the magnesium alloy of different materials has the best vibration absorption effect, and cubic curve has the best response characteristics.Fourth, the effect of single flexible parts to the system was studied and the conclusion showed that rod is the primary effected component; then the stress-strain characteristics of the rod optimized. The result showed that the arm in the limit position got barely driving force. Structural optimization tool was used to reconfigure the material distribution, and the arm mass was reduced without reducing much strength.In the end, a comprehensive optimization program was concluded:changing the component materials with magnesium alloy; switching a flexible coupling or timing belt to connect the servo motor and crank shaft; using cubic function curve to drive the structure; increasing the width and thickness of rod; optimizing the size of the ann components and adding rubber skin outside the ann.