44 KB594 KB31 KB200020242013Kütükde, KenanTaşkesen, Ahmetštevilka:2letnik:47str. 169-176ISSN:1580-2949COBISSID:977322URN:URN:NBN:SI:doc-QUEUKYYHenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijecompositescutting forcedrillingkompozitiNavarnavorpowder metallurgyprašna metalurgijasila rezanjaTaguchi methodTaguchijeva metodatorquevrtanjeOptimization of the drilling parameters for the cutting forces in B4C-reinforced Al-7XXX-series alloys based on the Taguchi method| Optimiranje parametrov vrtanja za sile vrtanja pri zlitinah Al-7XXX, ojačanih z B4C s Taguchijevo metodo|In this study, drilling tests of aluminum-based composites produced with the powder-metallurgy (PM) technique and reinforced with boron-carbide (B4C) particles were carried out with three different types of drills under dry cutting conditions. In order to determine the mechanical properties of the produced composites, hardness and tensile tests were performed. Moreover, the effects of the machining parameters such as cutting speed, feed rate, particle fraction and cutting-tool material, and of their interactions on the thrust force and cutting torque were determined with the Taguchi experimental design. Drilling parameters were optimized in terms of cutting forces (thrust force and torque). Furthermore, an analysis of variance (ANOVA) was conducted to obtain the degree of the effect of the parameters. The most influential control factors for the cutting forces were found to be the particle fraction and feed rate. According to the experimental results, the thrust force and cutting torque increased significantly as the feed rate or the particle content increased. On the other hand, the influence of the drill-bit material and the interactions of the factors for the cutting forces were quite lowV tej študiji so bili narejeni preizkusi vrtanja kompozita na osnovi aluminija, ojačanega z borovim karbidom (B4C) in izdelanega po postopku prašne metalurgije (PM), s tremi različnimi svedri in pri suhem vrtanju. Za določitev mehanskih lastnosti izdelanega kompozita je bila izmerjena trdota in opravljeni so bili natezni preizkusi. Poleg tega so bili določeni s Taguchijevo eksperimentalno tehniko parametri obdelave, kot so hitrost rezanja, hitrost podajanja, delež delcev, material za orodje za rezanje in njihov vpliv na potisno silo ter navor pri rezanju. Parametri rezanja so bili optimirani glede na sile rezanja (potisna sila in navor). Poleg tega je bila narejena analiza variance (ANOVA), da bi dobili stopnjo vpliva parametrov. Ugotovljeno je bilo, da sta najbolj vplivna kontrolna faktorja na sile rezanja delež delcev in hitrost podajanja. Skladno z rezultati preizkusov potisna sila in navor močno narasteta, če se poveča hitrost podajanja ali poveča vsebnost delcev. Po drugi strani so razmeroma majhni vplivi materiala svedra in medsebojni vpliv faktorjev na sile rezanjaTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije