Experimental investigations of pick-rock interface temperature in drag-pick cutting

Abstract

<span style="font-size:11.0pt;line-height:115%; font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:arial;mso-ansi-language:en-us;mso-fareast-language:="" en-us;mso-bidi-language:ar-sa"="">Temperature developed during drag-pick cutting has been measured in laboratory, on a single pick orthogonal cutting tool. Other cutting responses such as cutting force, wear rate of picks, and depth of cut were also measured. All these measurements were carried out for different machining parameters such as thrust and cutting speed on five rock type’s viz., sandstone two varieties of granites and two varieties of limestones. For softer rocks (limestones), the maximum temperature ranged between 236 and 566°C whereas in harder rocks (granites) temperatures as high as 920°C were also recorded. This rise in temperature may be due to the frictional heat produced by the rubbing of the rake and flank faces of the drag cutter against the rock surface. The deleterious effect of high temperature, indicated by wear rate, has also been studied.</span>