Vibration Balance And Optimization Of Combing Nipper Mechanism

The high speed combing machine can improve the production efficiency, which can bring about huge economic benefits. But the high-speed reciprocating swing of combing nipper machanism causes great inertia force. The inertial force acts on the frame by cylinder axis, nipper balance shaft, tension axis, which results in the violent vibration of the whole combing machine. The vibration brings about noise pollution and worsening environment, increasese fatigue damage and reduces the life of the part, brings about the decline of combing process quality and the reducing of the company’s benefit.This topic explores the essence of nipper mechanism’s vibration. Inhibition of nipper mechanism vibration is analyzed from different points of view by a variety of methods. Comprehensive consideration, choose from the direction to reduce the vibration source. On the basis of the mechanical equilibrium theory, the researching of vibration is going on. The Pro/E 3D model of nipper mechanism is builded, and we analyze the nipper mechanism by ADAMS’s kinematics and dynamics. From the result, we obtain the shaking force change during an oscillation cycle. We analyze nipper mechanism vibration change rule under different process parameters. Add the clump weight to the nipper mechanism. Take the quality of clump weight m1, centroid r1, azimuth θ1 as design variables. Take the total inertia force of nipper mechanism and the clump weight as optimization objective. Take advantage of the optimization module of ADAMS, we can analyse nipper mechanism’s vibration balance optimization and obtain the optimum parameters of clump weight.Theoreticial studies have shown that, the design variables are m1=6kg, r1=43.7mm, θ1= 38.1°. Contrast with the original nipper mechanism’s vibration, the nipper mechanism’s vibration with optimized clump weight decreasese by 81.1%. Contrast with the original clump weight and the optimized clump weight of nipper mechanism, it is concluded that eight groups of nipper mechanism from a combing machine with installed the original clump weights produce the inertia force. Its largest amplitude is 645.52 N. Eight groups of nipper mechanism from a combing machine with installed the optimized clump weights produce the inertia force. Its largest amplitude is 270.64 N. Relative to the original clump weight, the inertia force of nipper mechanism with the optimized clump weight reduces by 58.1%.Use the vibration measuring instrument measure combing nipper mechanism’s vibration displacement with the original clump weight and the optimized clump weight. The experimental results show that, the comber’s speed is 350, 400, 450 pliers/min, the nipper mechanism’s vibration with optimized clump weight is falling. With 350 pliers/min, six test points’ displacement is reduced by an average of 5.21%; With 400 pliers/min, the six test points’ displacement is reduced by an average of 8.14%; With 450 pliers/min, the six test points’ displacement is reduced by an average of 5.32%.