We investigate a mathematical model for induction hardening of steel. It accounts for electromagnetic e ects that lead to the heating of the workpiece as well as thermomechanical e ects that cause the hardening of the workpiece. The new contribution of this paper is that we put a special emphasis on the thermomechanical e ects caused by the phase transitions. We take care of e ects like transfo...

In this study, the effects of cutting edge geometry, workpiece hardness, feed rate and cutting speed on surface roughness and resultant forces in the finish hard turning of AISI H13 steel were experimentally investigated. Cubic boron nitrite inserts with two distinct edge preparations and throughhardened AISI H13 steel bars were used. Four-factor (hardness, edge geometry, feed rate and cutting ...

A heat transfer study of resistance spot welding has been conducted both theoretically and experimentally. A numerical solution based on a finite difference formulation of the heat equation has been developed to predict temperature distributions as a function of both time and position during the welding process. The computer model also predicts the temperature distribution through the copper el...

The technology of hot flat rolling is a complex technological process that includes multiple shaping steel billet, the temperature bullet ranging from 1100 to 900 degrees [1-6]. To deform workpiece, mill rolls are used. control over workpiece thermal state an important task aimed at quality its manufacturing [7-13]. achieve goal, mathematical model developed for calculating billet state. makes ...

Helical milling operations are used to generate or enlarge boreholes by means of a milling tool. The bore diameter can be adjusted through the diameter of the helical path. The kinematics of helical milling on a three axis machine tool is analysed firstly. The relationships between processing parameters, cutting tool geometry characters with machined hole feature are formulated. The feed motion...

Existing simulation models used in predicting the surface roughness of a workpiece in finish turning are based on an ideal circular cutting tool nose profile. This leads to a single predicted roughness value for a given set of input parameters. In this paper, a simulation approach that considers the random tool nose profile micro-deviations as well as the tool chatter vibration to predict a rou...

Friction stir welding (FSW) can be defined as a green technology, because the consumption of energy during this process is less than other welding methods. In addition, during the process there is no gas, filler material or other consumables. It should be noted that, complex curved shapes are now commonly used in different industries in a bid to have lightweight structures. According to the abo...

Hybrid workpiece localization/envelopment plays an important role in automatic setup of workpieces. In this paper, we de ne hybrid workpiece localization/envelopment problems to partially nished workpieces. We rst analyze symmetric properties of nished surfaces of a workpiece and con guration space. We localize the workpiece with measurement points from the nished surfaces so as to obatin a rep...

The term xturing refers to the task of immobilizing a workpiece for the purpose of performing operations such as assembly and machining. As such, xturing is of fundamental importance to industrial manufacturing. Fixtures can either be fabricated from scratch, or assembled from a toolkit of modular components, the latter approach is termed modular xturing. In this paper, we present a complete al...

In the current industry, coolants are widely used in numerous operations for purpose of cooling and heat transfer. These include all kinds sinks electronic devices manufacturing processes such as milling, drilling, turning, CNC machining. The thermophysical properties play a vital role determining effectiveness transfer help prevent components from wear tear caused by extremely high temperature...