Abstract
Traditional finishing technology is difficult to realize the precision machining of complex geometric parts. Abrasive flow machining technology solves this problem well. Taking the spur internal gear as the research object, the wall shear force, static pressure, dynamic pressure, and abrasive velocity vector of the internal channel of the straight internal gear under different inlet velocity, abrasive concentration, and abrasive particle size are analyzed by using the large eddy simulation method, and the action law of different parameters on the machining of straight internal gear by solid–liquid two-phase abrasive flow is discussed. At the same time, the orthogonal test was carried out. The results show that the solid–liquid two-phase abrasive flow machining technology can effectively remove the burrs, pits, and bulges on the tooth surface of spur internal gear, reduce the tooth surface roughness, and improve the surface quality. The optimal combination of processing parameters and the primary and secondary order of various factors affecting processing are obtained by range analysis and analysis of variance. The regression equation is constructed by regression analysis to verify the effectiveness and accuracy of the model, which provides theoretical support and data reference for actual processing and production.
Highlights
Internal gear pair has been widely used in gearbox
E) 16# Figure 17 Tooth surface profile of spur internal gear It can be seen from Figure 17 that there are obvious spot-like protrusions and pits of various shapes on the tooth surface of the original
Aiming at the problem of insufficient accuracy of internal gear tooth surface machining by traditional finishing technology, And proposes the selection of abrasive flow machining technology combined with large eddy numerical simulation method to carry out numerical simulation calculation and experimental research on internal gear
Summary
The essence of the law of conservation of energy as a basic law that all heat exchange fluid systems must satisfy is the first law of thermodynamics. The expression of the energy equation is:. Where: E is the total energy of fluid clusters, J⁄kg including the sum of potential energy, internal energy and kinetic energy; E = h − p⁄ρ + u2⁄2; h is the enthalpy; hj is the enthalpy of the component; keff is the effective heat transfer coefficient, and W⁄(m ⋅ K),keff = k + kt,kt is the turbulent heat transfer coefficient, which requires specific turbulence The model is determined; Jj is the diffusion flux of the component j; Sh is composed of the chemical reaction heat and the user-defined volume heat source term
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