Modeling of Temperature Distributions in the Workpiece During Abrasive Waterjet Machining

Abstract

Modeling of temperature distributions in a block-type workpiece during cutting with an abrasive waterjet (AWJ) was the subject of an analytical/experimental investigation in the present study. The experiments included measurement of detailed time-temperature distributions in the workpiece for selected AWJ/workpiece operational parameters. Mathematical modeling of the problem made use of a two-part process. In the first part, the measured experimental data were fed into an inverse heat conduction algorithm, which determined the corresponding heat flux in the workpiece. In the second part, this heat flux was fed into a two-dimensional transient heat conduction model that calculated the corresponding temperature distributions in the workpiece. It is demonstrated that the proposed model can serve as a useful thermal analysis tool for AWJ cutting processes so long as a quasi-steady-state condition can be established in the workpiece.

Numerical and experimental simulation for heat flux and cutting temperature estimation using three-dimensional inverse heat conduction technique*

“…In this case, in spite of the application of one-dimensional model in ellipsoidal coordinates [6,15,16], a three-dimensional model is more appropriated to describe heat transfer in machining.…”

“…Ohadi and Cheng [14] in high speed machining and Yen and Wrigth, [15], Lin [ Ohadi and Cheng [14] have modeled the temperature distribution in a block-type workpiece during cutting with an abrasive waterjet (AWJ) considering that the workpiece is long enough so that "quasisteady-state" conditions can be established. Yen and Wrigth, [15] and Lin [16] have applied inverse techniques in the conventional metal cutting processes using simplified models. They have employed the ellipsoidal coordinates for investigating the transient problem that occurs in the tool-workpiece interface temperature during end milling.…”

Temperature determination at the chip–tool interface using an inverse thermal model considering the tool and tool holder

“…Ohadi and Cheng [15] applied them in high speed machining and Yen and Wrigth [16], Lin [17] and Stephenson [18] in conventional metal cutting. These works has used simplified models considering either the geometrical dimensions or steady conditions.…”

“…In this case, in spite of the application of one-dimensional model in ellipsoidal coordinates [14][15][16], a three-dimensional model is more appropriated to describe heat transfer in machining [19,20].…”

“…These works has used simplified models considering either the geometrical dimensions or steady conditions. Ohadi and Cheng [15] have modeled the temperature distribution in a block-type workpiece during cutting with abrasive waterjet process (AWJ) considering that the workpiece is long enough so that "quasi-steady-state" conditions can be established. Yen and Wrigth [16] and Lin [17] have applied inverse techniques in the conventional metal cutting processes using simplified models.…”