A corn precision dibbler was designed aiming to solve the problems of high rate of empty seed and asymmetry of seeding,etc.The main technology parameters of dibbler were determined.The precision metering device and compulsive cam opening device were used to ensure the quality of seeding.The duck-beak compulsive opening device was simulated to measure the duck-beaks swing angle,angular velocity and angular acceleration,with the cam of duck-beak compulsive opening device designed based on the relative path cu...