Patent ID: 6503029
Filing Date: 2003-01-07
Classification: B23B,B23Q,Y10T

Abstract:
A boring arrangement adapted to be connected to a boring machine equipped with a boring bit for boring a hole in a workpiece, said boring arrangement comprising:a first element adapted to be secured to the boring machine; a second element that is movably connected to said first element so as to enable a relative motion between said first and second elements in a boring feed advance direction; a resilient biasing arrangement interposed between said first and second elements so as to bias said first and second elements apart from one another in said boring feed advance direction and so as to transmit a pressing force from said first element to said second element through said resilient biasing arrangement; a pressing sleeve that is connected to said second element at an end thereof facing away from said first element, and that has an end surface adapted to be pressed against the workpiece whereby said pressing force is transmitted from said second element through said pressing sleeve onto the workpiece, and that has a hollow interior space therein adapted to allow the boring bit to pass therethrough in said boring feed advance direction so as to contact the workpiece and bore a hole therein; and an air flow arrangement arranged in at least one of said first element, said second element and said pressing sleeve and adapted to cause an air flow that removes boring swarf from said hollow interior space of said pressing sleeve; wherein said air flow arrangement includes at least one air hole provided in a sleeve wall of said pressing sleeve, a suction opening provided in one of said first and second elements, and a suction pipe that communicates with said suction opening and is adapted to be connected to a source of suction; and wherein said sleeve wall includes two edge flanks that overlap each other circumferentially in a spiral fashion, and said at least one air hole comprises a lengthwise extending gap between said two edge flanks.