Secondary Development Of Optimizing And Designing The Moving Cam Mechanism Process On Fishing Reels

Cam mechanism is widely used in all kinds of automatic machines because of its simple structure and the functions of transmission,guidance and control.The cam mechanism studied in this paper is a sliding chute moving cam mechanism which is modified based on traditional moving cam mechanism.It is used for controlling wire cup on the fishing reel to do reciprocating linear motion.Due to customers responded that the hands feel bad when using the fishing reel products,the main research content in this paper includes the following aspects for this problem:A dynamic simulation of the sliding chute moving cam on a kind of products in this company by a virtual prototype simulation software called ADAMS is finished.The law of displacement,velocity,acceleration,driving resistance force and pressure angle are analyzed in one motion cycle.The maximum values of driving re sistance force and pressure angle are too big to make a good dynamics performance when the product works.A mathematical model is established for the follower motion law of the sliding chute moving cam mechanism.A new method that reducing the maximum value of pressure angle by changing the shape of sliding chute curve is proposed in order to reduce the maximum value of driving resistance force but keep the stroke unchanged after optimization.The dynamic simulation of the optimized cam mechanism is carried out.The curves of dynamic and kinematic parameters with time are measured and compared with the results of the preliminary simulation.The feasibility of the optimization method is proved by the simulation results.The design scheme of the optimized cam mechanism is given back to the manufacturer,and the experiment is carried out on the product.The feasibility of the optimization method is verified by the practical results.The optimization method is summarized,and the mathematical optimization model is established for the optimization method.Reel products have the same mechanical structure and the same dynamic problem,but do not have the same size.Secondary development of the software involved the optimization method and analysis method can make des ign and analysis for the cam mechanism of each specification product more efficient.The scheme this paper picks is to make the software through MATLAB GUI to finish the function that input cam mechanism specification and output cam mechanism main design parameter,to develop the module of ADAMS in order to finish mechanism simulation analysis through the development interface system form.The scheme two was finally adopted through comprehensive consideration.The feasibility and correctness of the system are verified.Considering the dynamic unbalance of the rotor is one of the main causes of the harmful vibration of the product,the dynamic balance optimization design of the flywheel rotating mechanism of the original product is carried out by using the two-sided balance theory.The mass block is added to the virtual prototype in ADAMS,and the motion simulation is carried out in one rotating period.The inertia force in each direction of the correction plane before and after adding the mass block is compared,and the actual counterweight scheme is proposed.The feasibility of the dynamic balance optimization method is proved from the simulation results.