Abstract:
Tool block with a cutting insert holder (12), provided with a cutting insert (14), and a clamping device comprising a pivotally arranged lever (20), one end of which acts on the cutting insert holder (12) while the other end of which cooperates with a spring loaded device (21).
Abstract:
The present invention relates to a cutting tool preferably for milling. The tool comprises a holder (30) and a cutting insert (10). The cutting insert (10) has a generally circular basic shape and includes at least one cutting edge (16) created by the transition between an upper face (11) and an edge face (13) of the cutting insert (10). The upper face (11) is a rake face, and the edge face (13) is a clearance face. The holder and cutting insert have first means (37, 13b) for preventing rotation of the insert about a center axis (20). The clearance face is conical and converges towards a lower face of the insert. The first means for preventing rotation is provided distant from and radially short of the clearance face and at a part of the insert that is closer to the lower face than to the upper face so as to constitute an indication of fracture radially inside the conical clearance face. The holder and insert comprise second means (35, 13a) for preventing rotation of the insert. Also, said step constitutes an indication of fracture, and thereby a breakage of the cutting edge is better controlled. The present invention further relates to a cutting insert and a method for preventing rotation of the cutting insert about its center axis in a holder for chip forming machining.
Abstract:
The present invention relates to a shank (30; 60) for a milling tool, preferably an end mill, said shank (30; 60) including a first position (31; 61) and a second portion (32; 62), said first portion (31; 61) having at least a first recess (34; 64). The invention also relates to a coupling arrangement for the connection of a shank (30; 60) to a chuck (40; 50; 70; 80). When prior art shanks for milling tools are coupled to a chuck then the stability achieved in such a connection is not satisfying. The aim of the present invention is to increase the stability and consequently the load that the shank is subjected to. The present invention is characterized by having a transition surface (33; 63) between the first (31; 61) and the second (32; 62) portion, said first portion (31; 61) having a smaller diameter than the second portion (32; 62), said transition surface (33; 63) having an extension transverse to the longitudinal extension of the shank (30; 60). When coupled to a chuck (40; 50; 70; 80) the transition surface (33; 63) of the shank (30; 60) will cooperate with a contact surface (47; 57; 75; 85) of the chuck (40; 50; 70; 80).
Abstract:
The present invention relates to a tool for rotary chip removal machining. The tool comprises a cutting head (10), a retention means (11) and a shank (12). The cutting head (10) is provided with at least one cutting edge (27) which is integral with the cutting head. The cutting head and the retention means comprise overlapping asymmetrical means (15, 19) for mounting of the cutting head to the shank. The cutting head comprises two cutting edges (27), each major cutting edge (27) comprising a substantially straight edge (27A) and a convexly curved preferably part-circular edge (27B). The convex edge (27B) is provided radially outside the substantially straight edge (27A). The invention further relates to a cutting head for the tool.
Abstract:
The present invention relates to an end mill comprising an end mill head (11') having a pull rod secured thereto and a shank (13') having a hole (14') into which the pull rod is fitted. The end mill head has a cutting edge. The pull rod (12') is separable from the end mill head (11') and the end mill head and the shank (13') comprise cooperating abutment surfaces (19'; 20'). The abutment surfaces extend generally perpendicularly to the center axis of the end mill. The invention further relates to an end mill head and methods for securing an end mill head to a shank.
Abstract:
The present invention relates to a tool, a tool body and a tool tip for chip removing machining, wherein the tool in operative position preferably rotates about its longitudinal center axis. The tool comprises a tool body (12), a tool tip (10) and a pull rod, said tool body having a front surface and the tool tip having an end surface provided to detachably face each other. The body has a shank portion (40). The tool tip consists of injection molded cemented carbide and comprises a central blind hole (14) that cooperates with the means for retention, and at least one cutting edge (19). The blind hole and the cutting edge are integral with the tool tip (10). The cutting edge extends from the tool periphery to the area of the axis (22) of rotation of the tool. The front surface (24) and the end surface (16) comprise cooperating projections (30) and recesses (26), which are provided to substantially alone transfer cutting forces directed towards the shank portion appearing during machining. The cooperating projections (30) and recesses (26) are substantially X-shaped.
Abstract:
The present invention relates to a method and a cutting insert for threading. The method aims to produce a thread in a rotary work piece. The threading insert has a polygonal basic shape including at least one cutting corner. The cutting corner has two cutting tips (18a, 18b) with different projections (L1, L3), which cutting tips each comprises a cutting edge (30), which is provided to form a thread top substantially between the cutting tips (18a, 18b). The total, projected length of the cutting edge (30) is smaller than two thread pitches.
Abstract:
The present invention relates to a method and a cutting insert for threading. The method aims to produce a thread in a rotary work piece, wherein a threading insert, including at least one cutting tip, creates the shape of the thread. The flank infeed is performed in a direction (F) obliquely towards the rotational axis of the work piece and parallel to one thread flank of the thread. The cutting tip is provided with a cutting tip which has a passive edge (26), located at least partly on one side of an imaginary line (S) parallel with a direction of infeed (F) for the cutting insert and touching the cutting tip, said side facing away from the connected thread flank (23).
Abstract:
The present invention relates to a tool (10') and a cutting insert (12') preferably for grooving or slot milling. The tool comprises a holder (11') and a cutting insert (12'). The holder has at least one cutting insert pocket, in which the cutting insert is provided to be firmly clamped. The lower side (19') of the cutting insert pocket and the lower surface (29') of the cutting insert comprise cooperating projections (30') and recesses (26').