The Design And Study Of Automatic Machine Of Weighing Capsule

It has been thousands of years since Capsule invention invented,and is publicly accepted by people up to now.With the increase of people's requirements of living quality,more and more people use the drug scientifically and rationally,therefore pharmaceutical companies must make the capsule dosage control which is the most important part of the product precise.At present,automatic capsule filling machine makes the domestic market of the capsules filling industry,its filling volume is mainly controlled by manual adjustment lever,making it difficult to ensure the accuracy of capsule filling.This paper we present a design and research on automatic capsule weighing machine which can improve its capsule filling accuracy.This study is an online dynamic weighing system which can weigh each single pharmaceutical capsules in turn.Moreover,this system eliminates substandard goods by weighing filled capsules quickly in turns then calculates the results to adapt the requirements of dynamic and fast.This system is a comprehensive electrical mechanical control systems which integrates the mechanical electronic,pneumatic sensing,control and other aspects of technology,and will have a certain significance to machine manufacturing and other related industries.The main results of the study are:(1)Based on the previous experience and other designs we designed the automatic capsule online weighing machine.Combined Mechanical structure with pneumatic systems based on Pro/E,we build a whole prototype assembly and checking the positional relationship between the agencies to ensure that interference does not exist between the agencies.(2)The cam curve is optimized.Firstly,compare all kinds of motion cam profile curve using Matlab drawing functions,choose a relatively Superior curve,then use the three-stage method to make the Superior curve further optimization,and derive the relevant equations obtained maximum speed,maximum acceleration and maximum jerk with the variation of the parameter optimization.Finally,amend three sine law to multi-objective optimization applying genetic algorithm,sum up the three sections of the applicable working conditions of modified sine law,combine with the analysis of the optimization problem of the effect.After comparison,the maximum speed can be reduced by 9.28%,the maximum acceleration by 9.28%,and the optimization effect is obvious.(3)Make kinematics analysis and verification to connected system cam mechanism and the capsule sorting mechanism.Initially,use Pro/E Mechanism Simulation module series cam mechanism to make kinematic simulation detailed,get the two cam follower motion characteristics.Through its motion characteristic curve analysis and research verifing this design series cam mechanism is in line with the design requirements.Then,make kinematics analysis using Adams to capsule sorting system,to measure the contact force pin chute and cylinder push rod and lever movement characteristic points of the capsule,the sorting mechanism design is reasonable through analysis..(4)Use Ansys to make dynamic analysis of the system.First,make system main cam system modal analysis to obtain the corresponding natural frequencies and mode shapes of the case body movement that may occur during resonance,thus has a certain significance to improve motion weighing accuracy and smooth organization of system reliability has a certain significance.Then make coupled dynamics analyzed to the main CAM mechanism using Adams,get the contact stress variation of every key locations and stress deformation nephogram of CAM in the process of exercise,validate the correctness of mechanism design and provide guidance to the measures of reinforce and fault prediction.