Abstract
This paper presents an analysis of the impact of modification of thermomechanical properties of polymer materials on the process of gear wheel machining on a CNC machine tool. Polymer materials Tecaflon (PVDA) and polyethylene (PE) were used for processing. The materials underwent thermal modification i.e., annealing. Prepared samples (gear wheel dimensions Ø76.5 × 20 mm) were machined under the same conditions, only changing the feed rate parameter. A CNC milling machine of its own construction was used for machining with a horizontal numerical dividing attachment. The obtained gear wheels were tested using ZEISS GEAR PRO gear analyzes software. Deviations of the involute outline and the tooth line allowed classification of wheels in the 9th grade of accuracy. Machined teeth surfaces were examined for changes in the properties of surface layer, taking into account the influence of polymer material thermal modification on the surface condition. The samples were tested for mechanical properties (tensile strength) and thermomechanical properties (DSC and DMTA). The tests showed positive changes in material strength and significant improvements in PVDA Tecaflon after heat treatment.
Highlights
Involute cylindrical gears with straight teeth are most commonly used in drive units in many machines and devices
In the case of material samples after heating, the first phase shows differences in relation to PE1000 not annealed where tan δ begins to decrease from smaller values
It can be concluded that PE1000 shows slight changes in thermal
Summary
Involute cylindrical gears with straight teeth are most commonly used in drive units in many machines and devices They are most often machined using shaping, presented by Litvin and Fuentes (2004) [1], or with the envelope method presented by Boral et al. (2012) [4], and they are beginning to be commonly used due to their acid resistance and lower noise emission, which was the topic investigated by Uysal et al (2011) [5] These polymers are characterized by many advantages, which include: chemical resistance, the ability to dampen vibrations and as a result, low noise emission, low coefficient of friction, high abrasion resistance, self-lubricity, good insulating properties, low weight and aesthetic appearance, as presented by Bussey et al (2018) [6]. Golebski (2016) [7] described that the constant development of modern machine tools and cutting tools contributes to gear construction correction and improvement of gears machining technology, which he presented in his work with
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