Noise Evaluation of Coated Polymer Gears

Polanec, Brigita; Glodež, Srečko; Belšak, Aleš

doi:10.3390/polym15030783

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…Polymer gears are often used in different engineering applications, such as E-bikes, linear actuators, industrial and robotics automation, computer components, medical facilities, the food industry, etc. [ 1 , 2 , 3 , 4 ]. Polymer gears can be manufactured by cutting or injection moulding.…”

Section: Introductionmentioning

confidence: 99%

Computational Model for Analysing the Tooth Deflection of Polymer Gears

Ignatijev,

Glodež,

Kramberger

2024

Polymers

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A computational model for analysing the tooth deflection of polymer gears is presented in this paper. Because polymer gears have less stiffness compared to metal gears, the proposed approach considers a comprehensive analysis to determine the most suitable numerical model, i.e., the number of teeth that should be modelled for a given gear’s geometry and material. The developed computational model has been evaluated using a spur gear pair, where the pinion made of POM was meshed with a support gear made of steel. Material properties were assigned with linear elastic characteristics for the gear, while the pinion was characterised by hyperelastic properties using POM material. Furthermore, a nonlubricated frictional contact between the gear and pinion was considered in the numerical computations. The computational results that were obtained were compared to the empirical results according to VDI 2736 guidelines. Here, the computational approach showed more accurate results due to the hyperelastic material characteristics of POM and the simulation of multiple teeth meshing. However, VDI 2736 calculation showed comparability with the computational results, with a slightly larger deviation at higher loads. In this respect, the proposed computational approach is more suitable for analysing the tooth deflection of polymer gears under higher loads.

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Section: Introductionmentioning

confidence: 99%

Computational Model for Analysing the Tooth Deflection of Polymer Gears

Ignatijev,

Glodež,

Kramberger

2024

Polymers

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The effect of gear-manufacturing quality on the mechanical and thermal responses of a polymer-gear pair

Zorko,

Wei,

Vukašinović

2023

Journal of Computational Design and Engineering

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Gear-manufacturing quality affects the load sharing between the meshing gears as well as the load distribution along the width of the tooth. This study aims to investigate the effect of gear-manufacturing quality on the mechanical and thermal states of polymer-gear pairs and consequently on their lifetime. The deviations of the geometric quality parameters, i.e., the lead profile and pitch, were found to have a substantial effect on the stress (root and flank) state of the gear. The effect of the lead deviation was found to be most pronounced for the quality grades Q12 to Q10, where depending on the load, a 30–80% stress reduction was observed when improving the gear quality from Q12 to Q10. Improving the quality from Q10 to Q8 did not lead to a substantial improvement in the load distribution and the observed stress reduction was in range of 5–20%. Similar trends were found for the pitch deviation, where again the most pronounced stress reduction was seen when improving the quality grade from Q12 to Q10. The study reveals where the most effective changes, leading to an increased gear-life, can be achieved. Improving the gear quality grade from Q12 to Q11 proved to have a much more substantial effect than improving the gear quality from Q9 to Q8. Considering that improving the gear quality from Q12 to Q11 or even Q10 can be achieved by a proper tool design and corrective iterations with the right process parameters, while improving the quality from Q9 to Q8 is by far more challenging. A novel methodology is proposed to assess the effect of the gear's quality on the generation of heat and the resulting operational temperature. The proposed methodology enables more accurate prediction of the gear pair's operating temperature.

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Computational Model for Analysing the Tooth Deflection of Polymer Gears

Ignatijev,

Glodež,

Kramberger

2024

Preprint

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A computational model for analysing the tooth deflection of polymer gears is presented in this paper. Because polymer gears have less stiffness compared to metal gears, the proposed approach considers a comprehensive analysis to determine the most suitable numerical model, i.e., the number of teeth that should be modelled. The developed computational model has been evaluated on the spur gear pair, where the pinion made of POM has meshed with a support gear made of steel. Material properties were assigned with linear elastic characteristics for the gear, while the pinion was characterised by hyperelastic properties using POM material. Furthermore, a nonlubricated frictional contact between the gear and pinion was considered in the numerical computations. The computational results that were obtained were compared to the empirical results according to VDI 2736 guidelines. Here, the computational approach showed more accurate results due to the hyperelastic material characteristics of POM. However, VDI 2736 calculation showed the comparability with computational results with a slightly larger deviation at lower loads.

show abstract

Noise Evaluation of Coated Polymer Gears

Cited by 3 publications

References 35 publications

Computational Model for Analysing the Tooth Deflection of Polymer Gears

Computational Model for Analysing the Tooth Deflection of Polymer Gears

The effect of gear-manufacturing quality on the mechanical and thermal responses of a polymer-gear pair

Computational Model for Analysing the Tooth Deflection of Polymer Gears

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