Papers by Author: Yan Jun Han

Abstract: Four kinds of casting process were designed for the rear wearing plate of 65ZGB slurry pump in this paper. The casting process design principle, process parameters, points of attention, and the simulation parameters for the kind of high chromium cast iron casting were introduced. Huazhu CAE was used to optimize the casting process and the best casting process was selected. Practical production also showed that the casting process can reduce shrinkage defects of the casting.

Abstract: Based on the theory of graph representation, links of the oblique crossing 3R wrist are devided into carriers and carried links, and contributions of the carried links to the generaliazed inertia forces can be divided into two parts. The first part is due to the motion with the carriers and the second part is due to the motion relative to their carriers. At the same time, the concept of virtual link is introduced to calculate the first part and carriers’ generaliazed inertia forces. The second part is derived with Lagrange Equation. At the end, an efficient and systematic dynamic equation in which the coupling effects of carried links can be identified individually and systematically, is developed. This method provides the basis for the design of driving chains and leads to a computer automated analysis for other geared robotic mechanisms.

Abstract: Based on the study of 3R oblique non-spherical wrist and the analysis of the NC machine spindle’s function, the concept of a oblique crossing 3DOF NC spindle was offered and the 3D model of this 3DOF NC spindle was made with Solidworks software. At the same time, the kinematics model of this 3DOF NC spindle was setup with D-H parameter method and the kinematics & workspace of this 3DOF NC spindle were analyzed and simulated. Simulation results indicated that this 3DOF NC spindle, with compacted-structure, low inertness and considerable flexibility, could be in any gesture in the 3D space, and could expand the work range of the NC machine.