Patent ID: 7114892
Filing Date: 2006-10-03
Classification: B23B,Y10S,Y10T

Abstract:
1. Rotatable tool for chip removing machining, comprising a basic body rotatable about a geometrical center axis, and a replaceable cutting part which is rigidly connectable to an axially front end of the basic body by a male/female coupling; the coupling comprising a groove formed in a front end of the basic body, and a male part insertable into the groove and protruding axially rearwardly from the cutting part; the male part comprising a front base portion which is delimited by a pair of opposite, first flank surfaces, as well as a rear wedge portion which is narrower than the base portion and delimited by a pair of opposite, second flank surfaces; a forwardly open slot being formed in the front part of the basic body, which slot communicates with the groove and separates two elastically deflectable legs of the basic body which clamp the male part in the groove; the groove comprising two axially separated front and rear spaces; the front space mouthing at a free front end surface of the basic body and delimited by a pair of first, opposite side surfaces; the rear space being delimited by a second pair of opposite side surfaces; at least one of the two second flank surfaces of said male part being inclined at a first acute angle in relation to the center axis in a radially outward and axially rearward direction; one of the second side surfaces being disposed at the rear space of the groove and being inclined in relation to the center axis at a second acute angle in a direction radially inward and axially forward; the rear space of the groove forming a jaw having a variable minimum width in a radial plane oriented perpendicular to the center axis; the wedge portion of the male part having a maximum width in a radial plane; the legs being elastically deflectable away from one another, wherein the minimum width of the groove upon deflection of the legs away from one another being larger than the maximum width of the wedge portion of the male part; the first and second acute angles being equally large to create surface contact between the flank surfaces and the side surfaces when the legs resiliently spring back against the male part from their deflected state.