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2016, vol. 44, br. 2, str. 133-138
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Eksperimentalna istraživanja glodanja žljeba od legure titanijuma primenom obrade abrazivnim vodenim mlazom
Experimental investigations on pocket milling of titanium alloy using abrasive water jet machining
aCollege of Engineering Guindy, Anna University, Chennai, India bSt Josephs College Of Engineering, Chennai, India cSt Josephs College OF Engineering, Anna University, Chennai, India
e-adresa: kb@annauniv.edu
Projekat: Special Assistance Programme (SAP) by the University Grants Commission (UGC), Government of India, New Delhi, India to carry out this research work under the sanctioned project titled: Abrasive Water Jet Machining for High Strength Materials
Sažetak
Obrada abrazivnim vodenim mlazom je jedan od najrasprostranjenijih nekonvencionalinih procesa obrade materijala teških za obradu. Pored obrade rezanjem, koristi se za i za obradu struganjem, narezivanje navoja, izradu žljebova, glodanje, itd. U ovom radu podrobno su prikazana eksperimentalna istraživanja obrade titanijuma (TOAMV) abrazivnim vodenim mlazom primenom granatnog abraziva. Vršena su ispitivanja uticaja pritiska vodenog mlaza, razmaka između putanja alata, brzina putanje alata i brzine protoka abrazivne mase na konačne vrednosti dubine rezanja i rapavosti površine. Plan eksperimenata je napravljen pomoću programskog paketa L9 Orthogonal Array dok je ANOVA analiza varijanse bila od pomoći kod određivanja značaja procesa. ANOVA analiza dubine rezanja je pokazala da su razmak između putanja alata i brzina putanje alata dva najvažnije parametra procesa. Međutim, ANOVA analiza rapavosti površine nije dala ubedljive rezultate i parametri od značaja za proces obrade nisu mogli biti određeni.
Abstract
Abrasive Water Jet Machining (AWJM) is one of the most popular unconventional machining processes used to machine difficult-to-machine materials. Apart from regular cutting, it is also used for turning, threading, slotting, milling, etc. This paper details the experimental investigations on Abrasive Water Jet Pocket Milling (AWJPM) on Titanium (Ti6Al4V) using garnet abrasive. The influence of waterjet pressure, step-over, traverse rate and abrasive mass flow rate were studied on the output responses such as depth of cut and surface roughness (Ra). The experiments were designed using L9 Orthogonal Array and ANOVA analysis helped in determination of significant process. ANOVA analysis on depth of cut indicated that step-over and traverse rate are the most significant process parameters. However, ANOVA analysis for surface roughness (Ra) was inconclusive and the significant process parameters could not be determined.
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