Papers by Author: Zheng Mei Zhang

Abstract: Based on the experiment of turning aluminium alloy (7075-T651), the relations between the fractal dimensions of cutting forces with machining parameters are studied. Cutting speed, feed speed and cutting depth are considered as the process parameters. The cutting force in turning aluminium alloy operation are measured and the fractal dimension are calculated using the algorithm of correlation dimension. From main effect plots the fractal dimensions of three directions of cutting forces are reduced with the increase of cutting speed, increased with the increase of cutting depth and insignificant with the increase of feed speed. The mathematic models of fractal dimension of cutting force are developed using response surface methodology (RSM). The results of the ANOVA show that cutting speed and cutting depth have remarkable influence to fractal dimension D_x, D_y and D_z.

Abstract: Based on the experiment of milling aluminium alloy (7075-T651), the relations between the fractal dimensions of cutting forces with machining parameters are studied. Cutting speed, feed speed and cutting depth are considered as the process parameters. The cutting force in milling aluminium alloy operation are measured and the fractal dimension are calculated using the algorithm of correlation dimension. From main effect plots the fractal dimensions of three directions of cutting forces are reduced with the increase of cutting speed and increased with the increase of feed speed and cutting depth. The mathematic models of fractal dimension of cutting force are developed using response surface methodology (RSM). The results of the ANOVA show that feed speed and cutting depth have remarkable influence to fractal dimension D_x and D_y, cutting speed and feed speed for D_z.

Abstract: Based on orthogonal experiment of machining the irregular surface of Wulian red granite (G3768) with diamond profiling wheel, the relations between the fractal dimensions of cutting forces with machining parameters are studied. Cutting speed, feed speed and cutting depth are considered as the process parameters. The cutting force in machining granite operation are measured and the fractal dimension are calculated using using the algorithm of correlation dimension. From main effect plots the fractal dimensions of three directions of cutting forces are reduced with the increase of cutting speed and increased with the increase of feed speed and cutting depth. The mathematic models of fractal dimension of cutting force are developed by analysis of regression. The results of the ANOVA show that cutting speed and feed speed have remarkable influence to fractal dimension D_x, D_y and D_z.

Abstract: In the process of cutting Countertop Board with Disc Circular Saw Blades, the intersecting that generated by them was an arc, which would improve the stress state of the blade greatly, therefore the efficiency of processing was improved significantly. However, in the process of cutting, the arc formed by them would be changing with the changing of the cutting depth. For the reason that the appropriate cutting radius of the Disk Circular Saw Blades also would be changing with the changing of the cutting depth. In this document, we can get the relationship between the appropriate cutting radius and the cutting depth, as well as the relationship between the the reasonable cutting radius and the structure and size of the Disc Circular Saw Blades through the theoretical analysis and calculations on the basis of the experiment, which could provide a reliable basis for the efficient and rational use of Disc Circular Saw Blades[1].

Abstract: Based on orthogonal experiment design, a study on the one-fourth arc special-shaped surface of Lord Red granite was conducted, the relationship between cutting speed, feed rate and cutting depth with tool wear rate and grinding force were analyzed. The research shows that tool wear rate and grinding force are basically reduced with the increase of cutting speed and aggrandized with the increase of feed rate and cutting depth. By regression analysis the empirical formulas of grinding forces are concluded, it is the theoretical foundation for on-line monitoring grinding force to optimize the processing parameters for machining irregular surface of granite.

Abstract: Based on orthogonal experiment design the study about the irregular surface of Qilu Red granite was performed, the tend charts of technologic parameters were established. The relations of factor primary and secondary between cutting speed, feed rate and depth of cut on two performance measures, machining efficiency and wear of cutter were investigated by range analysis, and the optimal cutting parameters for each performance measure were obtained too. Mathematic models of machining efficiency and wear of cutter were deduced by analysis of regression about experimental results. The theoretic foundation was offered to reasonably select technologic parameters of grinding for irregular surface of granite.