Open AccessWear Analysis of gun barrel drill blade in 1.0503 steel drilling process in Milpro HG12 oil environment with addition of ultra-dispersive copper particles and copper oxides
Author(s) -
K. Rychlik,
C. Senderowski
Publication year - 2020
Publication title -
technical sciences
Language(s) - English
Resource type - Journals
eISSN - 2083-4527
pISSN - 1505-4675
DOI - 10.31648/ts.4966
Subject(s) - drill , drilling , barrel (horology) , materials science , blade (archaeology) , copper , mechanical engineering , metallurgy , tungsten carbide , composite material , engineering
The paper presents construction solutions for guiding a single-sharp barrel drill blade during drilling deep holes, with an analysis of construction and technological problems for two ways of inserting the drill into the processed material in the first stage of drilling - using a pilot hole or guide sleeve.
During the implementation of the technological process of deep drilling of holes with barrel drills using a vertical numerical milling machine FNE 40NC AVIA, the kinematics of the object-tool system (P-N) and other technological parameters affecting the execution of pilot holes in strictly defined technological operations were analyzed.
The course of operational tests carried out using two types of cooling-lubricating agents - Milpro HG12 oil without and with the addition of ultra-dispersive copper particles and copper oxides (0.05 ÷ 0.6 µm), Panther GP-1 (PWPH PantherOil Poland) in a ratio of 1 to 100 is characterized.
Based on the performed drilling of through holes in 1.0503 steel with EB80 drills with a diameter Dc = 8 mm, made of cemented carbide K15 (WC 94%, Co 6%), the course of wear of the barrel drill blade on the total drilling path Lw = 8000 mm for 112 was determined through holes and Kw geometric wear indicator of the drill bit.
The obtained results of wear were compared with the results of tribological tests. with the use of cooling lubricants, under the conditions of friction involving 1.0503 steel with tungsten carbide, of chemical composition as K15. The material and technological conditions of abrasive wear of a particular friction pair are the same as for operational tests of the barrel drill blade wear at deep hole drilling.