A multiple indexable insert milling cutter of extremely simple precise construction providing unusual economy of manufacture. The tool includes a circumferential groove having a pair of angularly related insert locating surfaces and a back up or seat for each insert comprising a simple flat plate positioned in a slot transverse to the groove. The seating face of the plate positions a positive rake insert and a negative radial rake angle sufficient to provide flank as distinguished from insert cutting edge contact with the divergent locating surfaces of the groove. In the preferred embodiment conical locating surfaces defining a "V" groove engage triangular insert sides with line contact along two conical elements having a slightly greater than 60.degree. angular relationship in an axial-radial plane intersection with said groove.
A cutter for facing ends of tubes has a cutting edge perpendicular to the axis of a drive shaft and extending obliquely from a plane containing a reference side face of the cutter. The cutter has a base end portion fitted in a cutter mount groove which is defined by a reference side face a specified distance away from the drive shaft axis. The cutter is positioned as shifted a predetermined distance along the length of the groove, with the cutter reference side face bearing on the groove-defining reference side face, whereby the cutter is adapted to cut the tube end in a direction a predetermined angle outward with respect to a tangential direction of the tube at the cutting position.
A cutter insert of the indexable type comprises a plate of a generally quadrilateral shape including a front face, a rear face and four side faces. The cutter insert has two peripheral cutting edges defined by two opposite side faces and the front face. A pair of notches are formed in two diagonal corners of the cutter insert, and the other two diagonal corners are chamfered to provide respective corner faces which define together with the front face a pair of end cutting edges.
A cutter for processing a surface of a metal workpiece includes a body of a generally circular cross-section. The body has a plurality of generally radially outwardly-opening recesses formed in a circumferential surface of the body in circumferentially spaced relation to each other. Each of the recesses includes a first bearing surface sloping radially outwardly in a direction away from a forward end face of the body and extending to the circumferential surface. The recess also includes a second bearing surface sloping radially outwardly toward the forward end face. The second bearing surface is disposed forwardly of the first bearing surface and disposed at a predetermined angle relative to the first bearing surface. A plurality of cutter inserts of a quadrilateral shape are received in the plurality of recesses, respectively. Two adjacent side faces of the insert are held in contact with the first and second bearing surfaces, respectively. The insert has an end cutting edge at the corner thereof at which the side face held against the second bearing surface and the side face facing away from the first bearing surface intersect each other. The insert also has a peripheral cutting edge formed on the side face facing away from the first bearing surface. A plurality of clamp members are received in the recesses, respectively, and releasably hold the inserts in position.
A cutting tool employing negative cutting inserts providing both high volume stock removal and a fine surface finish. The insert utilizes negative radial and positive axial rake angles and incorporates a lead angle of between about 30.degree. degrees to about 90.degree. degrees.
A tool for material-removing machining of workpieces of hard metal with a blade plate held by a clamping lug is suggested which is distinguished in that the blade plate (11) has a groove (25) provided on the front side (45) in which the clamping lug (13) engages.
