Abstract:
The present invention relates to cutting tools with cutting inserts and, more particularly, to cutting tools with cutting inserts that have mounting recesses. The cutting insert (21) includes a body (23) having a mounting hole (25) having an axis (A) extending therethrough, and a surface portion (37) in the mounting hole. The surface portion is substantially circular when viewed in a direction of the axis and is non-parallel to the axis and including at least two contact points (39) disposed at a lesser distance from the axis than a region (31) between the at least two contact points. A cutting tool (45) is also disclosed.
Abstract:
A cutting tool (30, 230, 320) assembly includes a tool body (32) and a clamping mechanism for releasably clamping a cutting insert (50, 250, 350) to the tool body. The clamping mechanism includes a rotatable cam member (68, 268, 368), a coupling member (70, 270, 370), a biasing spring (72, 272, 372) and a clamping element (78, 278, 378). The rotation of the rotatable cam member in opposite senses results in the adjustment of the position of the coupling member in opposite directions, which results in a displacement of the clamping element, and therefore changing the locking position to a releasing position and vice versa.
Abstract:
A clamping tool holder (10) includes a tool holder body (12) and a clamp (10) for clamping a cutting insert (22). The clamp (40) causes the cutting insert (22) to press against the bottom and the side walls of an insert-receiving pocket (14) of the tool holder body (12). The tool holder body (12) has an inclined surface (34) sloping inward in a direction away from the insert-receiving pocket (14) . The clamp (40) has an inclined surface (50) that acts as a ramp with the inclined surface (34) of the tool holder body (12). A guide pin (60) prevents the clamp (40) from twisting during tightening or loosening of the clamp. When a clamp screw (52) is tightened, a nub (48) of the clamp (40) engages only an inside rearward surface of a mounting bore (24) of the insert and the top surface (22a) of the cutting insert (22). In addition, only a forward lower face (46a) of a head portion of the clamp screw (52) engages a top surface (22a) of the clamp (40).
Abstract:
A tool holder, in particular a turning tool holder, is equipped with a rapid locking system (4 to 10 inclusive) for the mechanical fastening of interchangeable inserts (21) to the tool holder body (1). The inserts may be made of Tungsten Carbide, Cermet, Ceramics, PCBN (Diamond Cubic Boron Nitride) or PCD (Polycrystalline Diamond). The rapid locking system (4 to 10) consists of a clamp (5), a drive pin (7) and a cylindrical pin (8) mounted on the drive pin (7). The cylindrical pin (8) extends radially with respect to the drive pin (7) and cooperates with two cams (10), each of which is equipped with a helical section (S) developed on an arc of 90 degrees. The cams (10) and the cylindrical pin (8) of the rapid locking system (4 to 10) are located inside a housing seat (23) formed in the tool holder body (1). The rapid locking system (4 to 10) allows an interchangeable insert (21) to be locked to the tool holder body (1) through a rapid action that allows a reduction of the time needed to index or to replace the insert (23).
Abstract:
A clamping tool holder (10, 100) includes a tool holder body (12) and a clamp (40) for clamping a cutting insert (22). The tool holder body (12) has an inclined surface (34) sloping inward in a direction away from the insert-receiving pocket (14). The clamp (40) has an inclined surface (50) that acts as a ramp with the inclined surface (34) of the tool holder body (12). A guide pin (60) prevents the clamp (40) from twisting during tightening or loosening of the clamp (40). When a clamp screw (52) is tightened, a nub (48) of the clamp (40) engages an inside rearward surface of a mounting bore (24) of the insert (22) along a line of contact (48a) and exerts a force downward and rearward on the insert (22).
Abstract:
A toolholder (21) for use with a cutting insert (23) having a clamping opening (25), comprising: a toolholder body (27); and a clamp (29) pivotably mounted to and contacting the toolholder body (27) and pivotable between a first position in which a protrusion (31) of the clamp (29) is disposed in a position in which it is adapted to be received in the clamping opening (25) in the cutting insert (23) to secure the cutting insert (23) to the toolholder body (27) and a second position in which the protrusion (31) is spaced, relative to the toolholder (21), upwardly from the first position so that the cutting insert (23) is not secured to the toolholder body (27) by the protrusion (31). A resilient member (41) is arranged relative to the clamp (29) to urge the clamp (29) to the first position and to resist pivoting of the clamp (29) to the second position. An opening (63o';63o") in the clamp (29) may receive a portion of a separate lever. A method for changing cutting inserts on a toolholder is also provided.
Abstract:
A clamp assembly for fastening a cutting insert to a tool holder is disclosed herein. The clamp assembly comprises: a body portion provided with a screw hole, a forward protrusion formed at the front portion of the body and extending downward, a rear protrusion formed at the rear end portion of the body and extending downward, and a bridge connecting the forward protrusion and the central portion of the body; and a pressing plate comprising upper and lower surfaces, a front nose portion, a rear end portion, and is provided with a keyhole shaped groove having an enlarged inner cavity open toward the rear end by a narrow neck extending thicknesswise. The forward protrusion is inserted into the enlarged inner cavity and the bridge is inserted into the narrow neck of the keyhole groove so that the pressing plate is coupled to the clamp.
Abstract:
Fluid passageway (36''') are defined by the top plate (30), tool holder body (22) and the cutting insert (27) to permit the optimum cooling of the interface between the insert and the word piece reducing degradation of the cutting edge of the insert. A number of top plate designs with channel configurations are disclosed to provide the desired coolant flow distribution and accommodate the desired flow rate.
Abstract:
A tool comprising a toolholder (23) and a cutting insert (25) disposed in the pocket (27), the cutting insert (25) having a hole (39) having a cutting insert clamping surface (41) that is contacted by the clamp clamping surface (55). The clamp clamping surface (55) and the cutting insert clamping surface (41) are formed such that, as a clamp bottom surface (49) is moved toward a bottom surface (65) of the pocket (27) when a post (51) is in a post hole (71) and a fastener (33) is in a clamp hole (35) and a toolholder hole (73), the cutting insert (25) is urged against the bottom surface (65) and a rear wall (67). A tool holder is also disclosed.