MM Science Journal, April 2008

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

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 (…)

System methodology of risk assessment in machine tools

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

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 (…)