Methodology of Virtual and Physical Verification of Symmetrical Design of Tandem Axle’s Input shaft for Mining Application

A multi-stage cold forging process was developed and complemented with finite element analysis (FEA) to manufacture a high-strength one-body input shaft with a long length body and no separate parts. FEA showed that the one-body input shaft was manufactured without any defects or fractures. Experiments, such as tensile, hardness, torsion, and fatigue tests, and microstructural characterization, were performed to compare the properties of the input shaft produced by the proposed method with those produced using the machining process. The ultimate tensile strength showed a 50% increase and the torque showed a 100 Nm increase, confirming that the input shaft manufactured using the proposed process is superior to that processed using the machining process. Thus, this study provides a proof-of-concept for the design and development of a multi-stage cold forging process to manufacture a one-body input shaft with improved mechanical properties and material recovery rate.

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Elastic hydrodynamic lubrication analysis for a sine movable tooth drive

Advances in Mechanical Engineering ◽

10.1177/1687814018814101 ◽

2018 ◽

Vol 10 (12) ◽

pp. 168781401881410 ◽

Cited By ~ 2

Author(s):

Lizhong Xu ◽

Wentao Song

Keyword(s):

Film Thickness ◽

Hydrodynamic Lubrication ◽

Normal Operation ◽

Speed Ratio ◽

Input Shaft ◽

Load Carrying ◽

Radial Dimension ◽

Lubrication Condition ◽

Shaft Rotation Angle ◽

Large Speed

The sine movable tooth drive has small radial dimension such that the heat, caused by friction, becomes an important factor in deciding its load-carrying ability. It is important to determine the amount of tooth lubrication in order to reduce the heat caused by the friction. This study provides equations for the meshing performance and provides the forces for the sine movable tooth drive. Using these equations, the minimum oil film thickness for the drive system is investigated. Results show that the minimum film thickness between the movable tooth and input shaft or shell changes periodically along the input shaft rotation angle. A large movable tooth radius and a movable tooth rotation radius could increase the film thickness between the movable tooth and the input shaft or the shell. In addition, a large speed ratio could increase the film thickness between the movable tooth and the input shaft, but this would also decrease the film thickness between the movable tooth and the shell. A large sine amplitude could increase the film thickness between the movable tooth and the input shaft, but this does not change the film thickness between the movable tooth and the shell. Under normal operation speeds, the hydrodynamic lubrication condition occurs between the movable tooth and the input shaft, and the partial membrane hydrodynamic state occurs between the movable tooth and the shell.

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Early Failure Study of Gearbox Input Shaft Bearing on Damage Rate

Proceedings of the 2nd International Conference on Electronic and Mechanical Engineering and Information Technology (2012) ◽

10.2991/emeit.2012.438 ◽

2012 ◽

Author(s):

Zongqi Liu ◽

Zhiyuan Li ◽

Yongguo Wang ◽

Guang Xia

Keyword(s):

Early Failure ◽

Input Shaft ◽

Damage Rate

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A New Method of Torque Compensation for High Speed Indexing Cam Mechanism

Journal of Mechanical Design ◽

10.1115/1.2829462 ◽

1999 ◽

Vol 121 (2) ◽

pp. 319-323 ◽

Cited By ~ 11

Author(s):

Teng Guilan ◽

Fu Haibo ◽

Zhou Weiyi

Keyword(s):

Kinetic Energy ◽

High Speed ◽

Output Shaft ◽

New Method ◽

Linkage Mechanism ◽

Energy Fluctuation ◽

Positioning Accuracy ◽

Input Shaft ◽

Cam Mechanism

Severe vibration and poor positioning accuracy may occur in an indexing cam mechanism operating at a high speed. Torque fluctuation of the input shaft and the resulting fluctuation of kinetic energy of the mechanism may be the major cause of the vibration. In this paper a method is proposed to minimize the fluctuation by using a so-called “speed-varying flywheel” that produces an opposite kinetic energy fluctuation that can counteract the effect of the energy fluctuation. The flywheel is installed on the output shaft of an additional cam-linkage mechanism. The parameter of the cam-linkage mechanism is optimized. An example is given to demonstrate the effectiveness of this method.

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