Modern Machinery (MM) Science Journal, October 2013

EFFECT OF HEAT LOAD TO THE FORMING MACHINES

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

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: transient thermal analysis | system dynamics | subsea equipment | Machine tool | large FEA | Krylov subspace | model order reduction

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: milling | development | cutting conditions | cutting tool | thermoplastic composite

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 (…)