Modern Machinery (MM) Science Journal, April 2008

System methodology of risk assessment in machine tools

Petr BLECHA
Keywords: risk management | risk assessment | risk analysis

The contribution deals with the problem of safety assurance in machinery in accordance with the requirements of the Directive 2006/42/EC of the European parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast), replacing the Directive 98/37/ES. The existing methods suitable for identification of hazards associated with machinery are reviewed. A new method (…)

A study of computer assisted analysis of effects of drill point geomerical features on forces and power in dribling with general purpose twisk drills

Jaromir AUDY
Keywords: cutting power. | thrust and torque forces | rake angles | chisel edge | lip region | drill point | geometrical features | general purpose twist drills | Computer assisted predictions

This paper presents results of a systematic – computer assisted – study focused on determining, and describing, from a mathematical point of view, the relationship between the drill point geometrical features and predicted performance measures as assessed by the cutting forces (thrust and torque) and cutting power when drilling a Type Bisalloy 360 steel work-piece material with general purpose twis (…)