Titanium has a wide variety of applications, particularly in the aerospace industry. However, because of its low thermal conductivity and high strength, machining of titanium is very difficult. The heat generated in machining can dramatically shorten the tool life. Rotary ultrasonic machining (RUM) is a non-traditional machining process, and has been used to machine various difficult-to-machine...

Due to their high-temperature resistance, nickel-based super alloys are used in many fields, especially the aviation and aerospace industries. In addition these advantages, there some machining difficulties. Some cooling methods minimize difficulties of materials. For this purpose, study, tool life, wear, surface roughness (Ra), cutting forces (Fc), zone temperature (T) were investigated turnin...

sar-kuh porphyry copper deposit is located 6 km southwest of the sar-cheshmeh copper mine, kerman province, iran. based on field geology, petrography and fluid inclusions studies, four alteration types have been identified in the sar-kuh area. early hydrothermal alteration formed a potassic zone in the central parts of mamzar granite/grano-diorite stock and propylitic alteration in its peripher...

ABSTRACT In this paper, the phenomenon of chatter vibration in metal cutting is investigated. For this purpose, a theoretical one-degree of freedom model of the vibrations generated in an orthogonal cutting process is developed. The dynamic cutting forces are strongly affected by the variations of the cutting process parameters, and the model is based on the mechanical theoretical prediction of...

This present investigation uses the Taguchi and response surface methodology (RSM) for modelling and optimization of the temperature produced during bone drilling. The drilling of bone is a common procedure in orthopaedic surgery to produce hole for screw insertion to fixate the fracture devices and implants. A major problem which is encountered during such a procedure is the increase in temper...

Laser assisted machining is an alternative to conventional machining of hard and/or difficult-to-process materials which involves pre-heating of a focused area with a laser beam over the surface of the workpiece to cause localized thermal softening along the path of the cutting action. The main advantage that laser assisted machining has over conventional machining is the increased material rem...

Quality improvements in laser cutting of mild steel have been achieved. by a newly developed model-based optimisation strategy. The specific aims of such efforts are to assure quality of cut when cornering. Such routines encompass a large proportion of all features processed on laser curting systems, and therefore their successful production is paramount. Associated with cornering is the elevat...

In this paper, predictive modeling of cutting and ploughing forces, stress distributions on tool faces, and temperature distributions in the presence of tool flank wear are presented. The analytical and thermal modeling of orthogonal cutting that is introduced in Part I of the paper is extended for worn tool case in order to study the effect of flank wear on the predictions. Work material const...

The in situ strain measurements during orthogonal cutting were performed to get information about the local stress state in the chip formation zone. These results will be used to verify and extend existing chip formation models. Until now the existing chip formation models, e.g. [1-3] are relying on a number of restricting preconditions, because the strain and stress fields in the chip formatio...

This paper uses quasi-steady molecular statics model and diamond tool to carry out simulation temperature rise of nanoscale orthogonal cutting single-crystal silicon. It further qualitatively analyzes temperature field of silicon workpiece without considering heat transfer and considering heat transfer. This paper supposes that the temperature rise of workpiece is mainly caused by two heat sour...