Patent ID: 6664495
Filing Date: 2003-12-16
Classification: B23K

Abstract:
A thermal cutting machine for thermally cutting a workpiece placed on a table from above by means of a torch movable in substantially a horizontal direction, comprising:a plurality of exhaust chambers which are separated by at least one partition plate provided in substantially parallel with one side of said table, and are placed side by side inside said table; an exhaust port provided at one end side in an exhaust direction of each of said exhaust chambers; exhaust means, which is provided at each of said exhaust ports, communicates with said each exhaust port via an exhaust duct shared by each of said exhaust ports or an individual exhaust passage, and performs exhaust of said each exhaust chamber; opening and closing drive means for opening and closing each of said exhaust ports; an air blow port provided at a side of the other end of each of said exhaust chambers and at a position substantially opposing each of said exhaust ports; air blow means which communicates with an inlet side of each of said air blow ports and blows air into said each air blow port; and control means for controlling each of said opening and closing drive means and each of said air blow means provided at both end sides of each of said exhaust chambers in synchronism with each other, or controlling them individually, correspondingly to a horizontal position of said torch which is under cutting operation.