Modern Machinery (MM) Science Journal, June 2010

CALCULATION OF SPINDLE COMPLIANCE CONSIDERINGS IT ́S INTERACTION WITH MACHINE FRAME

Matej Sulitka, P. Kolar
Keywords: FEM | Modal reduction | Modal decomposition | Coupled models of spindle and machine frame | Spindle dynamic properties

The calculation of spindle dynamic compliance is usually performed taking into account only the mechanical system of the spindle and tool, while the influence of the machine tool frame is neglected. However, when performing machining operations characterized by high cutting forces – which typically arise e.g. during roughing – machine frame vibration may be induced. Under such conditions, a model o (…)

SOFTWARE ARCHITECTURE FOR PARALLEL SIMULATION OPTIMIZATION

Petr Horejsi
Keywords: ARENA | optimization algorithm | simulation optimization | optimization | Simulation

Manufacturing simulation issues can be solved in a variety of different COTS (Commercial off The Shelf) simulation software – for example ARENA, QUEST, SIMUL8, Siemens PlantSimulation, etc. The input and output values can be stored in databases, but the interface has to be implemented by a developer. The output values (such as manufacturing time, average time of product waiting, etc.) from one simu (…)

ANALYSIS OF DELAMINATION IN DRILLING OF COMPOSITE MATERIALS

J. Sedlacek, M. Slany
Keywords: tool wear | drilling | delamination | composite materials

The aim of this work is to clarify the interaction mechanisms between the drilling tool and material. Among the defects caused by drilling, delamination appears as to be of the most critical and may occurs at both the entrance and exit plane. This paper presents a prediction Hocheng-Dharan model of thrust force for drilling without delamination. HSS twist drills with different geometry were used fo (…)

IDENTIFICATION OF MATERIAL PARAMETRES BY FEM

J. Rojicek
Keywords: material parameters | multilinear isotropic | torsion | tension | experiments | FEM | inverse algorithm

The article describes an identification of material parameters from set of experiments. The experiments were made with hollow cylindrical specimens. The specimens were fabricated from the steel (11375). In this study are used the data obtained from 5 experiments (axis force, torque and their combination). Software ANSYS v.11.0 based on Finite Element Method (FEM) was used as a tool for the identifi (…)