Author: Nelly Staneva
Articles
- STATIC ANALYSIS OF A BAND SAW SHAFT BY FEM
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Summary
A static analysis of the main shaft of a universal band saw with two bearing supports, a console drive side wheel and console V-belt pulley is carried out by the method of finite elements (FEM) with Autodesk Inventor ProfessionalÒ. The 3D model of the band saw shaft is generated with all elements of the real shaft – keyslot, grooves for clip ring, centre holes, chamfers, filets, and etc. Two variants of loading are set: first for vertical V-belt transmission and second for horizontal V-belt transmission. Stresses, strains, displacements and factor of safety distributions are obtained and visualized in the 3D model of the band saw shaft for these variants. The effected differences in the static strength of band saw shaft are analyzed.
Keywords: band saw, woodworking, shaft, static analysis, FEM, Autodesk Inventor Professional
- STUDY OF STATIC STRENGTH OF A MILLING WOODWORKING MACHINE SPINDLE BY FEM
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Summary
A static analysis of a milling spindle with two bearing supports from five-operating woodworking machine KP400 with lower position and console V-belt pulley is carried out by the method of finite elements (FEM) with program Cosmos WorksÒ. The milling spindle 3D model is generated with Solid WorksÒ with all elements of the real spindle – key-slot, grooves for clip ring, tread for fixing of the cutter, segments, chamfers, filets, etc. Von Mises stresses, equivalent strains, resultant displacements, stress intensities (P1 – P3) and factor of safety distribution is obtained and visualized. A decrease of the spindle inter-support distance is offered which brings about to reduction of stresses, strains, displacements, as well as to increase of the minimum factor of safety and will give opportunity to increase the vertical motion at spindle adjustment for this type of construction of the cutting mechanism.
Keywords: spindle, milling woodworking machine, static analysis, FEM, Cosmos Works
- FATIGUE STUDY OF A CIRCULAR SAW SHAFT WITH COSMOSWORKS
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Summary
In the last few years systematic fatigue studies are carrying out in Faculty of Forest Industry. Fatigue analysis of a 3D-model of circular saw shaft is carried out by finite elements method (FEA) with CosmosWorksÒ on the base of the fatigue curve (S-N curve) for carbon steel 45. Different fatigue events are studied – with constant amplitude (stress ratio R=-1) and with changeable amplitude. Plots for total life and damage, rainflow 3-D histograms and damage 3-D histograms are obtained.
Keywords: fatigue, fatigue life, circular saw, CosmosWorks, FEA