Study of utilizing differential gear train to achieve hybrid mechanism of mechanical press

Abstract

The problems of hybrid input of mechanical press are studied in this paper, with differential gear train as transmission mechanism. It is proposed that "adjustable-speed amplitude" or "differential-speed ratio" is the important parameters for the hybrid input mechanism. It not only defines the amplitude of the adjustable speed, but also determines the ratio of the power of the servomotor to the power of the conventional motor. The calculating equations of the ratio of transmission in all axes, the power of two motors, and the working load distribution are deduced. The two kinds of driving schemes are put forward that the servomotor and the conventional motor simultaneously drive and the servomotor and the conventional motor separately drive. The calculating results demonstrate that the latter scheme can use much lower power of the servomotor, so this scheme makes manufacture and use cost much lower. The latter scheme proposes a feasible way to apply the hybrid mechanism of mechanical press in practice engineering.mechanical press, hybrid mechanism, differential gear train, adjustable-speed

Kinematic and dynamic analyses of the multi-actuated mechanical press with parallel topology

“…Li and Tso 16 proposed an iterative learning control approach for a hybrid driven press and demonstrated the improvement of pouch position errors and precision through experiments. He et al 17 used the differential gear train as transmission mechanism to study the hybrid problems of the mechanical press. According to the application objective of hybrid mechanism, it can use a constant speed motor with a flywheel to produce majority of the force, and at the same time use a servomotor to tune the performance.…”

Meshing Efficiency Analysis of 2K-H Type Differential Gear Train Closed by CVT

“…2K-H type differential gear train is widely used in mechanical transmission because of its wide range of transmission ratio [4][5][6][7].Transmission efficiency is an important index for the performance measurement of 2K-H type differential gear train. The traditional efficiency analysis aims at getting the calculated result of efficiency [8,9], without further consideration of the effect of some parameters on the transmission efficiency.…”