Nickel-based superalloy GH4169 is a material with strong mechanical properties and difficult to process. In order reduce tool wear during processing improve the workpiece surface quality, based on finite element simulation software DEFORM, influence of n, ap, fz parameters carbide milling was studied, an orthogonal experimental model established. The prediction obtained. ultrasonic vibration co...

Molecular dynamics (MD) was used to simulate the effect of TiC particles distribution on tribological behavior reinforced composites. The mechanical properties, friction coefficient, number wear atoms, stress and temperature, microscopic deformation TiC/Ni composites during nano-friction were systematically investigated by MD reveal removal mechanism material. It found that larger radius partic...

Grinding is a complex material removal process with a large number of parameters influencing each other. In the process, the grinding wheel surface contacts the workpiece at high speed and under high pressure. The complexity of the process lies in the multiple microscopic interaction modes in the wheel-workpiece contact zone, including cutting, plowing, sliding, chip/workpiece friction, chip/bo...

An external transverse-alternating magnetic field with sinusoidal and triangular alternating currents was applied to a combined plasma arc to create a plasma arc for expanding the cross section of arc column and flatting the distributions of arc temperature. Two mathematical models were developed to describe the heat flux density distributions of the combined plasma arc driven by a transverse-a...

The following article examines the influence of glass-crystalline bond in grinding wheels with grains made from microcrystalline aluminum oxide, and specifically its effect upon the values of selected operational indicators in the process of traverse internal cylindrical grinding of surfaces made from Inconel® alloy 600. The experimental test results obtained showed that changes in the bond pha...

This paper presents a methodology to determine simultaneously (a) the flow stress at high deformation rates and temperatures that are encountered in the cutting zone, and (b) the friction at the chip–tool interface. This information is necessary to simulate high-speed machining using FEM based programs. A flow stress model based on process dependent parameters such as strain, strain-rate and te...

This paper presents the use of Cellular Automata (CA) for modelling micro abrasive machining. A onedimensional CA was initially used to model the workpiece, as having different heights, to represent the roughness; and the forces from the abrasive grits were modelled to randomly erode the workpiece, as such smoothening out and polishing the surface. The modelling was then extended further to two...

(72) Inventors: BEKIR SAMI YILBAS, DHAHRAN (57) ABSTRACT (SA); SOHAIL AKHTAR, DHAHRAN (SA); CIHAN KARATAS’ ANKARA The laser nitriding method of making phosphor bronze with (TR); CHRIS CHATWIN’ BRIGHTON surface-embedded titanium carbide particles involves coating (GB) a cleaned phosphor bronze workpiece with a thin ?lm formed (73) Assignee: KING FAHD UNIVERSITY OF of a carbonaceous layer mixed w...

A method and apparatus are presented for five-axis NC milling process simulation and dimensional verification. An algorithm is utilized which employs a dexel representation of the workpiece and milling tool to reduce the complexity of the solid representation and associated Boolean operations. This representation is exploited to obtain high computational efficiency which affords real-time visua...

In this paper, a state space model is developed to describe the dimensional variation propagation of multistage machining processes. A complicated machining system usually contains multiple stages. When the workpiece passes through multiple stages, machining errors at each stage will be accumulated and transformed onto the workpiece. Differential motion vector, a concept from the robotics field...