Papers by Author: Hong Zhen Chu

Abstract: Although intelligent NC programming technology has made some progress, the efficiency and practicability were not high. For this reason, we presented the intelligent NC programming pattern based on process scheme (PS). In this pattern, some models and the rules were mainly proposed. Firstly, by analyzing the machining characteristic of aircraft structural parts, we established the tree model of PS and the constructing rules. Secondly, we constructed the extended generalized pocket model by slicing recognition to create the machining volume model (MVM). Thirdly, the machining chain model was put forward based on the PS and MVM. Finally, the developed pattern and model have been applied in the intelligent NC programming system of aircraft structural parts and are validated with high practicability and efficiency through a case study.

Abstract: Tool cutting envelope (TCE) and tool path (TP) for planar profile machining are calculated at the same time in the presented work, using a novel motion method called Rolling Disk Motion (RDM) method. RDM method employs a rolling disk (RD) as the manufacturing tool, and considers the disk running around profile boundaries as cutting process. During this RD motion, RD center locus is just TP for profile or contour-parallel manufacturing strategy. Also, the track of point on RD contracting with the profile is just TCE. Furthermore, the RDM technique can find a further application in the study for uncut areas in machining domains. As well, the calculation of TCE, TP and uncut areas, based on RDM, are finished only by simple point transformations and arcs creation. Finally, an example is included to illustrate TCE and TP computation by means of RDM, and the result shows that the approach is implemented and tested successfully on real-world data.