Three-dimensional temperature field modeling method for flat base spiral end mill milling workpiece end

Abstract

The invention provides a three-dimensional temperature field modeling method for a flat base spiral end mill milling workpiece end. The method specifically includes the following steps: S1 axially dispersing a spiral end mill into a plurality of layers and obtaining heat source areas affecting temperature rise of the workpiece end in a cutting area of each cutter tooth micro element of each dispersing layer; S2 calculating heat source density of the heat source areas; S3 determining the heat distribution ratio of the heat source areas; S4 determining an instant limited large-face heat source transfer function of the heat source areas; S5 determining temperature rise of any point at the workpiece end according to the heat distribution ratio and the instant limited large-face heat source transfer function; S6 obtaining a temperature rise value of any point at any time according to the temperature rise of any point at the workpiece end and a temperature field at the workpiece end at any time can be obtained by summating the temperature rise value and the environment temperature value. By means of the method, a three-dimensional temperature field model of the flat base spiral end mill milling workpiece end is built, the temperature field on the surface of a workpiece in the milling process can be accurately obtained, and milling process parameter optimization based on cutting temperature is further achieved.

Description

technical field [0001] The invention relates to the field of metal cutting processing, in particular to a three-dimensional temperature field modeling method for the end of a milling workpiece, which is suitable for the milling processing of a flat-bottomed helical end mill. Background technique [0002] During the metal milling process, the work of the machine tool is converted into an equal amount of cutting heat. Except for a small amount of cutting heat dissipating into the surrounding medium, the rest is transmitted into the tool, chips and workpiece, resulting in an increase in the temperature of the machine tool process system and accelerating the cutting of the tool. Wear and tear will cause thermal deformation of the workpiece, and even cause thermal deformation of the machine tool in severe cases. [0003] Research on cutting heat was initially carried out in continuous cutting such as grinding and turning. During continuous cutting, cutting heat is continuously ge...

AI Technical Summary

Problems solved by technology

Moreover, due to the complex geometry of milling cutters and non-right-angle discontinuous cutting in milling, the temperature field modeling method suitable for grinding and turning processes cannot be directly applied to the calculation of temperature rise distribution at the workpiece end during milling.

Images