Abstract
Gear wear is a progressive material removal process that gradually changes the tooth profile shape and dynamic mesh force, where the dynamic mesh force affects the tooth surface wear. To describe this process, a spur gear dynamic model that includes the mesh stiffness and unloaded static transmission error (STE) of the worn tooth profile is proposed for calculating the dynamic mesh force. Then, based on the finite element method (FEM), a dynamic contact analysis model that considers the dynamic mesh force is proposed for calculating the time-varying contact stress and relative sliding distance of the tooth surface mesh point. Finally, combined with the Archard wear model, a tooth wear depth calculation method that considers the worn tooth profile and the dynamic mesh force is proposed. In addition, the wear depth and dynamic characteristics under different wear times are studied.
Highlights
Gear transmission devices are widely used in the field of mechanical engineering because of their high transmission efficiencies, stable transmission ratios, compact structures and long service lives [1,2,3]
The wear depth obtained by the finite element method (FEM) simulation is consistent with the experimental results, confirming that the wear depth calculation method based on the FEM is feasible and that the wear coefficient obtained by the pin-on-disc wear test is reasonable
A wear depth calculation method that can be used to update the geometry of the wear contact surface is proposed based on the FEM
Summary
Gear transmission devices are widely used in the field of mechanical engineering because of their high transmission efficiencies, stable transmission ratios, compact structures and long service lives [1,2,3]. Gear wear is a gradual material removal process that gradually changes the tooth profile shape and dynamic mesh force. There are two ways to study the wear depth of the tooth surface: experiments [6,7,8] and numerical simulations [9,10,11,12,13,14]. The wear data measured by experiments are often only a macro total, making it difficult to elucidate the details of gear profile wear. The numerical simulation method is the most popular method for studying gear wear
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