754 KB21 KB199920252015Bendikiene, RegitaKeturakis, GintarasPilkaite, TilmutePupelis, Edmundasletnik:61številka:7/8str. 459-464, SI 82ISSN:0039-2480COBISSID:14100763URN:URN:NBN:SI:doc-AMK0ZGOBenZveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikhrast (les)navarjanjeobraba orodjaobraba roburezkanje lesaSAWWear behaviour and cutting performance of surfaced inserts for wood machining|Machining, in general, and wood machining, in particular, are complex to explain and many factors influence the process. Natural wood is a nonhomogeneous biological material, so each species of wood requires different machining conditions and tools. Understanding the properties of wood and choosing the proper cutting tools and machining parameters can improve the quality of wooden products, increase production efficiency, and improve machining. The objective of this study was to find the most suitable cutting tools for the machining of oak wood grown in Lithuania. This paper describes tests of two commercial cutting inserts made of high speed tool steel (CT01M-LA2 and 8X6FT) and two experimental inserts (EI) made by surfacing using a submerged arc welding (SAW) technique and a mixture of alloying elements spread on the surface under industrial flux. The results obtained from the milling tests demonstrated the suitability of the suggested surfaced inserts for machining oak wood. All tool wear parameters, such as cutting edge radius, edge recession, nose width, and cutting power, have been evaluated and compared. The cutting edge radius of EI after 3200 m of cutting length was ~ 5.00 %m, 3 to 4 times lower than the wear of standard tools; similarly, the edge recession of the surfaced inserts showed 2 to 3 times lower results. The results of this study indicate that the cutting power increases as the feed per cutter increases. These findings suggest that surfaced inserts can replace the commercial inserts used for wood machiningCilj predstavljene študije je bil poiskati najprimernejša rezalna orodja za obdelavo hrastovega lesa, ki raste v Litvi. Članek obravnava preizkuse dveh vrst komercialnih rezalnih ploščic, izdelanih iz hitroreznega jekla (CT01MLA2 in 8X6FT), ter dveh eksperimentalnih ploščic (EI), izdelanih z navarjanjem po postopku elektroobločnega varjenja pod praškom (SAW) z zmesjo dodajnih elementov, ki se pod industrijskim praškom razporedijo po površini. Osnovni material za navarjanje je bila 8-milimetrska plošča iz cenenega navadnega ogljikovega jekla (C: 0,14 do 0,22 %; Si: 0,12 do 0,13 %, Mn: 0,4 do 0,65 %, S: % 0,05 %, P: % 0,04 %). Navarjanje je bilo opravljeno s tehniko SAW na vzorcih velikosti 40 x 100 mm, v enem prehodu in z zmesjo dodajnih materialov (pribl. 6 g), razporejeno po površini pod praškom. Postopek elektroobločnega varjenja pod praškom je bil izveden s samodejnim varilnim aparatom (z gorilnikom MIG/MAG EN 500 78). Zmes materialov v prašku je bila razporejena po površini osnovnega materiala in raztaljena z električnim oblokom. Za zaščito območja varjenja je bil uporabljen dodaten standardni prašek AMS1 (GOST 9087-81)TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo