title: Impact resistance of materials for guards on cutting machine tools--requirements in future European safety standards.
abstract: Guards on machine tools are meant to protect operators from injuries caused by tools, workpieces, and fragments hurled out of the machine's working zone. This article presents the impact resistance requirements, which guards according to European safety standards for machine tools must satisfy. Based upon these standards the impact resistance of different guard materials was determined using cylindrical steel projectiles. Polycarbonate proves to be a suitable material for vision panels because of its high energy absorption capacity. The impact resistance of 8-mm thick polycarbonate is roughly equal to that of a 3-mm thick steel sheet Fe P01. The limited ageing stability, however, makes it necessary to protect polycarbonate against cooling lubricants by means of additional panes on both sides.
authors.affiliation: Institute for Occupational Safety of the Accident Insurance Institutions (BIA), Sankt Augustin, Germany. D.Mewes@hvbg.de
authors.forename: D
authors.initials: D
authors.lastname: Mewes
authors.forename: R P
authors.initials: RP
authors.lastname: Trapp
mesh_terms: D000062:Accidents, Occupational / Q000517:prevention & control*; D004867:Equipment Design; D004868:Equipment Failure; D019544:Equipment Failure Analysis / Q000295:instrumentation*; D004869:Equipment Safety / Q000592:standards*; D006804:Ergonomics; D005060:Europe; D005260:Female; D005858:Germany; D006801:Humans; D008297:Male; D008422:Materials Testing; D008669:Metallurgy / Q000295:instrumentation*; D008670:Metals; D011076:Polycarboxylate Cement; D019904:Polymethyl Methacrylate; D011482:Protective Devices / Q000592:standards*
chemical_list: D008670:Metals; D011076:Polycarboxylate Cement; C005506:polycarbonate; D019904:Polymethyl Methacrylate