Patent ID: 6503030
Filing Date: 2003-01-07
Classification: B23D,Y10S,Y10T

Abstract:
A reamer for fine machining of surfaces of drilled holes in workpieces, the reamer comprising:a base body for being advanced in a drilled hole to be reamed; the body having a front side which is advanced into the hole; a main blade supported toward the front side of the reamer body; an auxiliary blade behind the main blade with respect to the front side of the reamer body, such that the drilled hole is first reamed by the main blade and thereafter is reamed by the auxiliary blade as the reamer body is advanced through the drilled hole; each of the main and auxiliary blades having a same respective side toward which chips are directed by the blades reaming the hole; a chip surface adjoining both of the blades on the side toward which the chips are directed by the main and auxiliary blades and the chip surface extending inwardly toward the axis of the reamer body; a chip deflector step limiting the extent of the chip surface, the step being spaced away from the blades and extending along the length of the blades; the deflector step falling away in a first zone of the body over which the auxiliary blade extends to exhibit an increasing distance from the auxiliary blade in the direction opposite advancing of the reamer body, and the deflector step being further oriented to rise in a second zone of the reamer body over which the main blade extends to exhibit a decreasing distance from the main blade, in the direction of advance of the reamer body.