MM Science Journal, October 2013

EFFECT OF HEAT LOAD TO THE FORMING MACHINES

Zdenek Chval
Keywords: forming machines | hydraulic forging press | mechanical crank forging press | heat load | FEM simulation

When designing a forming machine for hot forming, it is necessary to take into account the effects of heat on the construction. Therefore, it is important to perform an in-depth analysis of the possible influences of temperature on individual parts of the machine and subsequent effects on durability of the construction and machine accuracy. The article deals with the thermal analysis of a crank forging (…)

KRYLOV SUBSPACE MODEL ORDER REDUCTION OF LARGE SCALE FINITE ELEMENT DYNAMICAL SYSTEMS

"Jaroslav Sindler, Matej Sulitka"
Keywords: model order reduction | Krylov subspace | large FEA | Machine tool | subsea equipment | system dynamics | transient thermal analysis

The purpose of model order reduction (MOR) techniques is to provide a fast response approximate solution of a given system. Naturally the error induced due the approximation should be as low as possible. The paper presents the benefits of using a Krylov subspace based MOR for solution of large scale finite element (FE) dynamical systems. The main advantage of using a Krylov MOR is significantly shorteni (…)

DEVELOPMENT OF A CUTTING TOOL FOR COMPOSITES WITH THERMOPLASTIC MATRIX

Petr Masek, Pavel Zeman, Petr Kolar
Keywords: thermoplastic composite | cutting tool | cutting conditions | development | milling

Fibre reinforced thermoplastic composites (FRTC) are becoming an increasingly important material for a wide range of applications. Thus, the demand for high performance tools for machining of this material is increasing. The main goal of the presented research results is to decrease cutting costs during trimming operations of thin plates and to increase the quality of machined composite materials by sui (…)