Construction method of numerical model of flow field in cutting zone with minimum quantity lubrication

Abstract

A construction method of a flow field numerical model in a minimum quantity lubrication cutting area comprises the following steps of building a cutting two-dimensional or three-dimensional model; conducting grid dividing on the module; leading the grid-dividing-completed-model in simulation software and using a steady state flow field computing method to conduct simulation after defining entry conditions and exit conditions; building a motion model and a cutting heat model and converting the motion model and the cutting heat model into recognizable language of the simulation software; selecting an appropriate nozzle model and a wall film boundary model; leading the models in a steady state flow field and using an unsteady state computing method to conduct simulation to obtain velocity field distribution, pressure field distribution, temperature field distribution, fogdrop diameter and fogdrop speed. The construction method can have flow field influences of minimum quantity lubrication on the cutting area during cutting and influences on the minimum quantity lubrication on workpieces and temperature fields inside a tool, provides basis for minimum quantity lubrication system setting, and simultaneously is used for parameter optimization of a minimum quantity lubrication system.

Description

technical field [0001] The invention relates to a lubrication method for cutting processing, in particular to a method for constructing a numerical model of a flow field in a cutting zone of a minimum quantity lubrication (Minimum Quantity Lubrication), and belongs to the technical field of mechanical cutting processing. Background technique [0002] Minimal quantity lubrication cutting technology usually refers to a lubrication method in which compressed air carries lubricating oil broken into microns by compressed air into the cutting area. The lubricating oil mist forms a lubricating film between the workpiece and the tool to reduce the friction between the tool and the workpiece, and the compressed air absorbs heat through heat exchange and the lubricating oil evaporates, so the temperature in the cutting area can be reduced and the tool size can be reduced. Wear and improve cutting performance. However, many problems still need to be solved in the research and practica...

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Problems solved by technology

Moreover, the DPM model has different conditions from the two-phase flow in the boundary setting, so the appropriate flow field model will affect the simulation results

[0005] After searching the existing literature, no public reports on the construction of the numerical model of the flow field in the MQL cutting zone have been found so far

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