Design And Strenth Analysis Of Heavy Type Automatic Tool Changer Mechanism

Automatic tool change institutions is the important device for mechanical handof the knife library changing tool.The carrying capacity of the key componentsachieving automatic tool change action play a crucial role. The subject based on Hertzcontact theory and differential geometry. Designed、modeled and simulated the cam ofautomatic tool changer.The key components of contact stress and strength is analyzed.The calculation methods for the machining parameters of the globoidal cam areacquired. Product requirements have been met, and get rid of the design flaws of thetraditional empirical method. It’s the machining instructive significance for theproduction of automatic tool changer.First, according to the rotation and reciprocating motion of the mechanical handdesigned the motion cycle diagram.Established the math model between the globoidalcam and follower.According to the reciprocating motion of the mechanical hand andthe motion characteristics of the four-link mechanism and the mechanisms establishedthe model between plane groove cam and follower. base on the modeling analysis ofthe globoidal cam and plane groove cam and the ProE powerful modeling capabilities,the cam ATC institutions is conducted a physical three-dimensional modeling and thesimulation analysis of the movement. The design expectations and the reliability ofthe design is verified.Secondly, due to restriction of the spindle swing angle of the special machine ofthe globoidal cam, causing the parts of the cam can not be machined.Based machiningprinciple.The establishment the objective function about machining globoidal camrequired minimum swing angle.Using numerical calculation get the angle ofmachining globoidal cam.Generating the machining pass trajectory and machiningdata.Providing a machining parameters.Providing sufficient theoretical guidance forthe processors.Finally, study the ATC cam strength,base on the theory of the contact stressanalysis and strength,the globiodal cam and groove cam of the ATC institutions iscalculated respectively,between the ProE simulation results and theoreticalcalculations is contrasted,verifiing the correctness of theoretical calculations basedATC cam,finally meet the strength requirements.