Research On The Structure Design And Test Of LED High Speed Chip Mounter Equipped With Simultaneously Mounting Head

With the rapid development of electronic science and technology,the automation degree of electronic assembly industry is deepening day by day.Surface mounted technology has become the key technology of electronic assembly industry.mounter is the most important equipment in SMT production line,its efficiency and accuracy determine the productivity and quality of the whole production line.In recent years,Light emitting diodes(LED)with low energy consumption,small size,fast response and a series of their own advantages to replace the fluorescent lamp,incandescent lamp and other traditional light sources,has become a new type of solid-state light source that attracted worldwide attention.At present,the domestic LED industry has a high degree of automation,most of the mounters in its production line are imported universal mounter,which are expensive and not fit with LED products,have low production efficiency.Therefore,it is of great significance for the development and upgrading of the LED industry to design a targeted chip mounter according to the characteristics and requirements of LED products.In order to solve this problem,we developed a new high speed chip mounter equipped with simultaneously mounting head for the LED industry.Mainly studied on the structure design and key technologies of high speed chip mounter equipped with simultaneously mounting head,Specific contents are as follows:1.Based on the analysis of mount object and the characteristics of mounting,the motion scheme of the mounter is proposed,the structure design of the whole machine and key components is Completed,the machine parameters are determined.2.Based on the motion scheme and structure of high speed chip mounter equipped with simultaneously mounting head,the timing planning and analysis of the mounter is completed.Setting minimum power consumption as objective function,the motion parameters of each axis as design variables,the mathematical model of timing optimization is established and the time sequence is optimized,the optimal solution of motion parameters is obtained.3.Based on timing optimization results,the numerical model of the dynamic analysis of the mounter is established and the dynamics simulation is carried out.The dynamic characteristic curves of each axis are obtained.According to the results of dynamic simulation,the optimization results of time squence and the structure of parts,the selection of the chip power is designed.4.Static and dynamic analysis of chip mounter beam is carried out in Ansys Workbench.The multi-objective optimization model of the beam structure parameters is constructed and t hen the change rules of the optimization targets with the structure parameters of the beam are found.The optimal structure parameters of the beam are obtained and the structural dynamics of the optimized beam is then verified.5.From the experiment of chip mounter prototype,the change rules of the motor shaft dy namic parameters in actual operation are founded.The actual mounting efficiency,distributio n and fluctuation of the mounting error of the chip mounter are also obtained from the experi ment.From the research above,we found that the maximum speed of the motor in x,y and z ax is is 3000 r/min,1000 r/min,3000 r/min respectively,the motion period is 0.44 s,0.12 s 0.14 s respectively and the acceleration period is 0.1309 s,0.06 s,0.07 s respectively.The numeri cal analysis result is basically coinciding with the practical result and the chip mounter runnin g smoothly in the whole working process.From the experiment results,the mounting error of the chip mounter is uniform distribute between-0.03 mm and +0.03 mm,which meeting the r equirement for mounting process.The practical efficiency of the chip mounter is 79985 chips per hour,which also meet the design requirement In conclusion,the kinetic scheme and struct ure design of the chip mounter are reasonable,that meeting the actual demand of chip mounting.