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The study investigated execution tolerances and profile load capacity curves occurring in industrial conditions. Using graphic images of fits expanded by profile load capacity curves, an attempt was made to explain the effect of the profile load capacity curve on the fitting character of the tenon joint.
Galvanizing treatment as a method to protect tools used in teaching processes. This paper presents the use of zinc coating applied on surfaces of wood machining tools - exhibits in teaching processes. Analyses were conducted to determine resistance of applied coatings to the action of various environments, which in an accelerated manner assessed suitability of coatings as a method of tool protection, mainly in terms of their contact with users. Very advantageous effects of zinc coating application were observed in the analyzed variant. Galvanizing processes and the resulting coatings made it possible to identify defects in the material structure of the tools, being the most frequent results of intensive operation and wear.
Comparative wear analysis of modified cutters during processing of milling of selected wood-based materials. This study presents comparative investigations of durability of cutters covered with different variants of antiwear coatings. The impact of hard coatings spread on faces of cutters on the wear of cutting edges during the process of milling of chipboards and MDFs was investigated. Every time, the wear of the cutting edge caused by milling chipboards and MDFs was determined in the area of the same cutter utilising the entire length of the main milling edge which guaranteed the same characteristics of the applied coating. The edge wear surface area was measured using, for this purpose, a surface analyser. It was established that milling chip boards and MDFs of similar mean density using cutters made from high-speed steel covered with antiwear coatings of different characteristics caused, for each of the examined cutting edges, at least over 50 times greater wear during chipboard milling. The character of the obtained wear curves makes it possible to assume that the applied milling method will allow initial assessment of edge durability, especially in the case of MDF and will make it possible, on this basis, to plan the timetable of investigations.
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