Experimental Measurement of Friction Coefficient Applied to HSM Modeling

Abstract

An experimental method using a specifically set-up is presented in order to investigate dry friction phenomena, which occurs in the cutting process at the tool chip contact, in a wide range of sliding speed. A ballistic set-up using an air gun launch is used to measure the friction coefficient for the steel/carbide contact between 15 m/s and 80 m/s. A series of tests are conducted according to the sliding velocity and the normal pressure. These measurements are also introduced in a finite element simulation. The focus of this work is to determine the relevance of the friction modeling in the finite element method of the high speed machining. Modeling results are compared with cutting forces measured on a similar experimental device, which can reproduce perfect orthogonal cutting conditions. Measurement of temperature fields during the cutting process complete the parameter required for modeling. The results show that in high cutting speed, the friction modeling usually used in the FE codes is limited and that novel formulations are needed.

A numerical method combining finite element and neural network model to study dynamic system prediction of dry friction

“…The dry friction phenomenon in the sliding velocity range 15 m/s to 80 m/s of the tool chip contact during the cutting process was investigated by an experimental method using a specific setting. 5 The experimental setup was used by Fridrici et al to study the fretting wear behaviour of polished and shot-peened Ti-6Al-4V specimens. The test results showed that the friction coefficient was variable during the cycle.…”

A smooth double spiral tool path generation and linking method for high-speed machining of multiply-connected pockets

“…They are 2 island ring (2) and (3)] and other 4 sub-domains. Among these 4 sub-domains, (1) and (6) can be thought to be an island chain for island ring (2); while (4) and (5) can be regarded as an island chain for island ring (3). The linking method with the sequence is…”

“…[2]. During high-speed machining (HSM), the shear sliding velocity of material removal process can reach or exceed a certain threshold value, and tend to be the best removal condition [3]. The efficiency, precision, and surface quality are obviously superior to traditional machining method in complicated surfaces machining [4].…”