The paper reports an advanced finite element analysis code for the investigation of the cutting process of rectangular groove. Three different restricted contact tools (RC tools) with rectangular, trapezoidal and double-trapezoidal shapes were employed in this study. The cutting force, feed force and rake face temperature distribution during the cutting process were analysed. The simulation res...

The objectives of this investigation were to evaluate the degradation in fatigue strength of dentin by diamond bur preparations and to identify the importance of cutting direction. Three groups of coronal dentin specimens were prepared from unrestored third molars, including a flaw free "control," and two groups that received a diamond bur cutting treatment performed parallel or perpendicular t...

Research of virtual surgical operations has advanced in recent years based on virtual reality technology. One basic operation is virtual cutting simulation. In order to realize the virtual cutting, there are two types of research, i.e. using a voxel model and a polygonal model.The voxel model expresses volume and is made by a small cube size. The polygonal model expresses the surface and is con...

Based on the lotus root slicing machine of crank-slider style designed by the authors, the virtual prototype model of slicing machine has been established by the software of PRO/E, and the kinematics and dynamics performances of the slicing machine were studied by utilizing ADAMS. At the same time, analyses were made on the changes of the cutting velocity and acceleration of blade, the force co...

Power reciprocating saws are used in surgical procedures to cut bone. Improved cutting rates are desirable in order to reduce operative time and improve patient outcome. A fixture was developed to test the effect of blade speed on cutting rate of bovine cortical bone. It was hypothesized that the volumetric cutting rate would increase in a linear manner for a fixed stroke length and a constant ...

Vermicular graphite cast iron, which is widely used in the automotive industry because of outstanding strenght properties. But, there are many problem with regard to machinability of this material. In this study, optimum cutting parameters were studied in order to improve machinability of vermicular graphite cast iron. Experiment parameters which is appropriate for ISO 3685 was selected. Depend...

Observations are made regarding the influence of cutting speed and friction on cutting force by way of finite element modeling. Simulations are validated by comparison of cutting forces and chip morphologies for the Al6061-T6. Analysis of cutting forces over a wide range of cutting conditions suggests an important role of the secondary shear zone in the decrease of cutting force as a function o...

The concept of an effective orthogonal cutting edge in turning is considered. The orientation of this edge in the radial-longitudinal plane, as commonly modeled through an effective lead angle, is studied. The methods of effective lead angle prediction used in numerous previously developed force models are plagued with large errors over ranges of process inputs, in particular feed rate and dept...