Abstract: This roughing end mill is provided with an end mill body which is rotated around an axis, and with a plurality of inserts which are placed on an outer circumference of the end mill body at a predetermined distance apart from each other in the direction of the axis. The plurality of inserts form insert rows of which a plurality are provided in a circumferential direction of the end mill body, and at least the inserts included in a group are positioned so as to be offset in the axial direction from each other in the different insert rows which are mutually adjacent in the circumferential direction. The inserts included in the group are provided with cutting edges which face towards an outer circumferential side of the end mill body and which are formed as waveform cutting edges which undulate as they move in the axial direction.

Abstract: A multi-function cutting tool is disclosed. The multi-function cutting tool includes a cutting insert (200) and a cutter body (300). The cutting insert has an upper surface (201), a lower surface (205), and first and second cutting edge corner parts (210) and (220), which are provided on the upper surface such that the upper surface has a symmetrical structure with respect to a diagonal direction. The cutting insert further has a major cutting edge part (230), a first minor cutting edge part (240), and a lowered cutting edge part (250). The major cutting edge part has a downwardly inclined angle ranging from 3° to 10°, and extends from the first cutting edge corner part towards the corresponding second cutting edge corner part. When seen in the front view of the cutting insert, the major cutting edge is defined by a convex curved line, which has a curvature radius of 1000 mm or more.

Abstract: A cutting insert for retention in a rotating cutting tool having an axis of rotation has two opposing end surfaces and a peripheral surface extending therebetween, each end surface having a mutual first axis of symmetry passing through the end surfaces about which each end surface has N-fold rotational symmetry for some value of N where N is chosen from the group consisting of 2, 3 and 4. A peripheral cutting edge is formed at the junction between each end surface and the peripheral surface, the peripheral cutting edge having N curved cutting edges merging with N straight cutting edges which extend between the curved cutting edges at extremities thereof. The curved cutting edges of the two end surfaces are not aligned in an end view of the cutting insert along the first axis of symmetry.

Abstract: This roughing insert is provided with an insert body, and a waveform cutting edge which is formed on an intersecting ridge line portion between a rake face and a flank face of the insert body, and which undulates along this intersecting ridge line portion. The waveform cutting edges are formed on the insert body respectively at positions which are rotationally symmetrical at predetermined angular intervals around a reference line of the insert bodies. These waveform cutting edges which are positioned rotationally symmetrically to each other are formed such that, when the insert bodies are rotated by the predetermined angle around the reference line, one or more portions of the waveform cutting edges do not match each other and are mutually asymmetrical.

Abstract: A double-sided milling cutting insert has usable upper and lower faces. The upper face has a polygonal shape with curved edges. The lower face has a rotationally symmetrical relation to the upper face. Flank faces connect edges of the upper face to corresponding edges of the lower face. Upper cutting edges are formed on one of the edges of the upper face. The upper chip-forming portions have rake faces inclined downwardly from the upper cutting edges inwardly of the cutting insert and a plurality of protrusions arranged along inner boundaries of the rake faces for deflecting chips. When the cutting insert is mounted on the cutting tool, a width of the rake face of the upper chip-forming portion adjacent to an edge portion forming a main cutting edge gradually increases in a direction going away from a rotational axis of the cutting tool.

Abstract: A cutting tool, and a loose top therefore, includes two parts detachably connected to each other via a threaded joint in which co-operating male and female threads are included in the form of helicoidal ridges. The profile shape of each helicoidal ridge is defined by a top and two flanks, which delimit a helicoidal groove having a bottom. The first flank is inclined in relation to a center axis of the tool at a first angle that is smaller than a second angle of the second flank in relation to the center axis. Accordingly, the thread ridge is reinforced in comparison with thread ridges having a symmetrical profile shape, whereby larger tensile forces than compressive forces can be applied to the threaded joint while avoiding damage to the thread ridges.

Abstract: This roughing insert is provided with an insert body, and a waveform cutting edge which is formed on an intersecting ridge line portion between a rake face and a flank face of the insert body, and which undulates along this intersecting ridge line portion. The waveform cutting edges are formed such that a portion thereof has a smaller wavelength than the remaining portion thereof.

Abstract: A indexable insert (1) of the present invention has a structure including at least a rake face (2) and a bearing surface (5), the indexable insert (1) including a substrate and a coating layer disposed on the substrate, wherein the coating layer includes one or more layers, and at least one layer of the one or more layers covers the entire surface of the substrate and satisfies the relationship F1<F2, wherein F1 represents the residual stress in the rake face (2) and F2 represents the residual stress in the bearing surface (5).

Abstract: An indexable insert has one or more recesses formed in a frontside or backside surface which receives a surface of the head of a locking screw. When mounted, the insert is forced against respective support surfaces of an insert pocket. The locking screw is threaded into a counterbored tap hole to engage the insert and provide side locating forces and clamping forces to secure the indexable insert in the insert pocket. More particularly, the indexable insert has a shaped surface recess that mates to a complimentarily-shaped surface on the head of a locking screw and secures the indexable insert in multiple dimensions to a seating surface. A material removal tool and a method of mounting the indexable insert are also disclosed.

Abstract: A fully indexable square cutting insert has four side surfaces connecting to two end surfaces. At the intersection of each side surface with an end surface is a primary cutting edge which extends from an insert corner and along a first side surface, in a downward direction towards a median plane. A wiper extends from the same insert corner and along an adjacent side surface, in an upward direction away from the median plane, to rise above an abutment surface of an associated end surface. The geometry of the cutting insert and of the insert pocket in which the insert is seated are such that the primary cutting edge has a positive axial angle (helix), while the insert has an overall negative axial angle for providing axial clearance and an overall negative radial angle for providing radial clearance.

Abstract: The cutting insert has a front layer (1A) provided with the lateral faces of a front circumference (3A, 4A, 5A, 6A) defining together with a large front face (1) a given number of cutting edges (13a, 13b; 14a, 14b; 15a, 15b; 16a, 16b). The cutting insert also has a rear layer (1B) provided with lateral faces of a rear circumference where at least certain faces are embodied in the form of faces supporting a frame (3B, 4B, 5B, 6B) on the walls of a toolholder housing (30), and wherein the number of the frame supporting faces (3B, 4B, 5B, 6B) is less than the number of cutting edges (13a, 13b; 14a, 14b; 15a, 15b; 16a, 16b).

Abstract: An insert for a drill in which one of the cutting edges respectively formed at four side ridge portions of a rake face of a square flat plate-shaped insert body is made to protrude toward the tip of the drill body of the indexable insert drill while being detachably attached is provided. Each of the cutting edges has a corner cutting edge located at a corner of the rake face, and a major cutting edge and a wiper edge which extend substantially toward one peripheral direction of the rake face from a corner cutting edge. The major cutting edge has a first major cutting edge portion which has a convexly curved shape and extends from the corner cutting edge, and a second major cutting edge portion which smoothly touches the first major cutting edge portion and extends linearly, as seen from a direction facing the rake face. The wiper edge has a straight shape intersecting the second major cutting edge portion at an obtuse angle.

Abstract: An insert is disclosed for use in cutting tool applications having two major faces and at least two cutting edges. The insert is indexable by repositioning the cutting insert from one face to the other face. The inserts may be mounted in a seat formed in a fixed cutting tool. The seat has a major seating surface for mounting the insert and for receiving a retainer at a predetermined angle. In one form, the seat may also have dovetail walls oriented to engage side walls of the insert and to reduce the shear force against the retainer during contact between the insert and a rotating workpiece. The fixed tool has reliefs and a tip pocket to protect an unused cutting edge on the insert.

Abstract: A cutting tool, for cutting a workpiece of a non-ferrous metal with hard particles dispersed therein, includes a rake face, a relief face, and a cutting edge formed at the intersection of the rake face and the relief face. A distal end portion of the cutting tool including the cutting edge is composed of a diamond tip. The relief face is divided into a first relief face and a second relief face with a curved boundary ridge therebetween. The first relief face intersects the cutting edge, and the second relief face extends from the boundary ridge away from the cutting edge. A first relief angle, that is an angle between the first relief face and the rake face of the cutting tool, is larger than a second relief angle that is an angle between the plane of the second relief face and the rake face. The boundary ridge is formed on the diamond tip.

Abstract: A mill has a front cutting portion with a plurality of peripheral cutting edges extending rearwardly from a front cutting end. Each peripheral cutting edge is adapted to generate a corresponding outer envelope of a body of revolution as the mill rotates around its longitudinal axis. At least one cutting edge is adapted to generate a cylindrical outer envelope; at least one cutting edge is adapted to generate a generally frusto-conical taper outer envelope extending away from the front cutting end while tapering radially outwardly; and at least one cutting edge is adapted to generate a generally frusto-conical dovetail outer envelope extending away from the front cutting end while tapering radially inwardly.

Abstract: A cutting tool having an outer surface with a plurality of inserts connected to a distinct pocket extending generally radially on the outer surface. The cutting inserts are arranged in a helical array on the outer surface in a manner that at least one cutting edge of each cutting insert is spaced in an angular circumferential direction from the pocket of the next adjacent cutting insert. The spacing of the inserts is such that a distinct point on the each one of the one or more cutting edges define part of a layout line having a non-uniform slope.

Abstract: A tool system comprising a holder and a cutting tool having a tool cutting edge and a fixing part, wherein the tool cutting edge projects by a predeterminable projecting length beyond the holder for a machining operation, is characterized in that the holder is provided at the outer circumference with a supporting part which projects in the direction of the projecting length of the tool cutting edge and forms a supporting surface for at least partial abutment of the cutting tool.

Abstract: A cutting tool has at least one cutting insert seated therein. The cutting insert has a longitudinal axis, an upper surface, a lower surface and a peripheral surface that extends between the upper surface and the lower surface. At least a portion of an intersection between the upper surface and the peripheral surface constitutes a cutting edge. The lower surface has at least one set of base abutment surfaces, each set including at a least one major base abutment surface and at least one minor base abutment surface, the major and minor base abutment surfaces of a given set being spaced apart from one another along the longitudinal axis. When the lower surface has two such sets of base abutment surfaces, the major and minor base abutment surfaces of the first set are longitudinally displaced from the corresponding major and minor base abutment surfaces of the second set.

Abstract: A milling cutter for chip removing machining includes a milling cutter body with a number of cutting insert seats in connection to a chip removing end of the milling cutter body, the milling cutter body being formed to cooperate with a tool attachment at its opposite end in the axial direction, wherein indexable cutting inserts are secured in the cutting insert seats, each the indexable cutting insert having a top surface and a bottom surface substantially parallel with the top surface, wherein side surfaces extend between the top surface and the bottom surface, the indexable cutting insert having the basic shape of a truncated pyramid. The invention also relates to a milling cutter body and an indexable cutting insert, per se. Each indexable cutting insert has its top surface facing against the chip removing end of the milling cutter, and main cutting edges of the indexable cutting insert extend from the top surface of the indexable cutting insert.

Abstract: An indexable milling insert has a parallelepipedic shape. The cutting insert includes a mounting hole placed centrally in the cutting insert, a first support side and a second support side, which support sides are parallel with each other and act as alternating support sides. The cutting insert is provided with main cutting edges, which are orientated perpendicularly to the centre axis of the mounting hole as well as provided in such a way that a rotation of the cutting insert around the centre axis of the mounting hole to an alternative insert seat alternatively a turning of the cutting insert to an alternative insert seat provides an identical location of the main cutting edges in relation to a piece to be machined. A milling tool equipped with such milling inserts is also provided. The cutting insert can include four identical sides for chip removing machining, the sides extending between the parallel support sides, and each side has exactly two cutting edge areas.

Abstract: A cutting insert has four quadrants defined by vertical and horizontal axes that pass through a centerline axis of the insert. The cutting insert further includes a top surface; a bottom surface; a plurality of clearance side surfaces extending between the top and bottom surfaces. A cutting edge is formed at an intersection between the top surface and the clearance side surfaces. A serration is formed in each clearance side surface such that two of the four quadrants that are diagonally opposite each other do not have serrations, and the other two of the four quadrants that are diagonally opposite each other include a pair of serrations. The cutting insert can be mounted to a milling cutter in a variety of patterns by rotating one cutting insert relative to another cutting insert in the same flute or in a different flute.

Abstract: A wood working knife for use in a wood working machine, comprising a knife body having a first cutting edge and an opposed second cutting edge, the knife body having a first clamping surface and a second clamping surface. The first clamping surface has opposed clamping features separated by a middle section, the opposed clamping features and the middle section being sized and shaped such that, upon the knife body being inserted into a clamping assembly, the clamping forces are localized towards the opposed cutting edges and away from the middle section.

Abstract: The monoblock surface milling cutter has a milling cutter body (10) to which cutting plates (16) made of polycrystalline diamond (PCD), monocrystalline diamond (MCD) or polycrystalline boron nitrite (PCB) are fastened in a material-to-material fashion. In order to improve the surface quality of the work pieces manufactured with the milling cutter, axially adjustable finishing inserts (18) are fixed in place in at least two substantially axially extending bores (26), which are open at the front, of the milling cutter body (10). The finishing inserts (18) can also be equipped with cutting plates made of PCD, MCD or PCB. Preferably the cutting edges (24) of the cutting plates (22) of the finishing insert (18) are forward curved.

Abstract: A cermet insert having a structure composed of a hard phase and a binding phase and, as a sintered body composition, containing Ti, Nb and/or Ta, and W in a total amount of Ti in terms of carbonitride, Nb and/or Ta in terms of carbide and W in terms of carbide of 70 to 95 wt. % of an entirety of the microstructure, and containing W in terms of carbide in an amount of 15 to 35 wt. % of the entirety of the microstructure, the sintered body composition further containing Co and/or Ni. The hard phase has one or two or more of the phases: (1) a first hard phase of a core-having structure whose core portion contains a titanium carbonitride phase and a peripheral portion containing a (Ti, W, Ta/Nb)CN phase, (2) a second hard phase of a core-having structure whose core portion and peripheral portion both contain a (Ti, W, Ta/Nb)CN phase, and (3) a third hard phase of single-phase structure including a titanium cabonitride phase.

Abstract: A ball endmill having a cylindrical tool body and ball-nosed end cutting edges each of which includes a first portion and a second portion continuous to the first portion. The first and second portions are located at a radially inner portion of each ball-nosed end cutting edge in a distal end view. The first portion is convex in a direction of rotation of the tool body and has a first radius of curvature seen in a distal end view. A ratio of the first radius of curvature to an outside diameter of the cylindrical body is between 0.025 and 0.10. The second portion is convex in the direction of the rotation of the tool body and has a second radius of curvature as measured in the distal end view. The second radius of curvature is larger than the first radius of curvature.

Abstract: The present invention is directed to a cutting insert with a rake face, a seating surface and a plurality of flank faces extending between the rake face and the seating surface. The intersection of the rake face and the plurality of flank faces define a plurality of cutting edges. The rake face of the insert has a plurality of corner regions formed at the intersection of side cutting edges to define corner cutting edges. The corner cutting edge in at least one corner region has a recessed profile when viewed from the side of the insert. The recessed profile has a concave shape and extends inwardly from the cutting edge. At the cutting edge, the recess has a conical shape to define a conical portion and further inward from the cutting edge the recess may have a cylindrical shape to define a cylindrical portion.

Abstract: A milling head for a milling device, particularly a rotary milling device, wherein the milling head is capable of imparting a desired finish on a tube, preferably of a heat exchanger tube. The milling head includes one or more milling elements capable of cutting and/or removing heat dissipating elements connected to an outer surface of the tube. The heat dissipating elements are removed from the tube in a longitudinal direction along the tube length. In one embodiment, the milling head also includes a bevel milling element. Methods for milling a tube having heat dissipating elements are also described.

Abstract: An end mill including a shank having one end gripped by a chuck which is rotatable about a predetermined rotation axis, and a blade body attached to the other end of the shank and rotatable together with the shank. The blade body has a shape in which the area of a cross section in a plane perpendicular to the rotation axis decreases as the distance from the shank increases, and includes a linear cutting edge parallel to, and at a certain distance from, the rotation axis. An end cutting edge adjoining the cutting edge in the longitudinal direction thereof may be provided. The blade body includes, for example, a rake-face-side surface including a rake face and adjoining the flank-side surface in two portions, and a linear cutting edge formed at one of the positions at which the flank-side surface and the rake-face-side surface come in contact with each other.

Abstract: A cutting insert, a tool for holding a cutting insert, with a cutting insert and method of machining a workpiece with a tool holding a cutting insert. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. §1.72(b). As stated in 37 C.F.R. §1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading “Abstract of the Disclosure.” The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

Abstract: The invention relates to a cutting insert having an essentially parallelepiped-shaped basic body with two larger spaced-apart longitudinal surfaces (10,11) which are connected to one another by two smaller transverse surfaces (12, 13) and two smaller longitudinal surfaces (14) designed as rake faces, wherein the smaller longitudinal surfaces (14) form with the adjacent surfaces a respective, encircling, closed cutting line which forms the cutting edges and rounded-off cutting corners, and the larger longitudinal surface (10, 11) merges on both sides via respective rounded-off edges into the smaller transverse surface (12, 13), and one of the rounded-off cutting corners is designed so as to project relative to a basic shape which is determined by the cutting lines, on both sides, of the larger longitudinal surfaces (10, 11) with the smaller longitudinal surfaces (14).

Abstract: An end mill is provided having an axis of rotation, a shank section and a fluted section, each extending along the axis of rotation, and a plurality of helical teeth. The fluted section has a first end attached to the shank section and a second end. The plurality of helical teeth is disposed within the fluted section. Each helical tooth has a cutting edge, a relief surface, a cutting surface, and an edge preparation surface. The edge preparation surface is contiguous with the cutting edge of the respective tooth.

Abstract: An indexable milling insert includes opposite top and bottom sides between which a peripheral clearance surface extends, and two opposite cutting edges formed in the transition between the top side and the clearance surface. Each of the cutting edges includes a substantially straight portion connected with a straight section of the clearance surface, and further includes a curved portion connected with a convexly arched section of the clearance surface. A coupling including one or more male- and/or female-like engagement members is located along said clearance surface. Furthermore, the milling insert may be used with a shim plate for attachment to a milling tool.

Abstract: A cutting insert includes a milling insert body defining a first part of a rake surface of the cutting insert and a core defining a second part of the rake surface. The milling insert body includes at least one trough for allowing coolant to pass therethrough. The core is attached to the milling insert body by inserting a projection into a central aperture of the milling insert body. The projection includes a locating feature to assist in properly positioning the core when inserted into the milling insert body. A coolant passage is formed when the core is inserted into the central aperture of the milling insert body. The milling insert body could be made from a relatively expensive material, while the core could be made from a relatively inexpensive material, thereby providing significant cost savings.

Abstract: A four-sided cutting insert has a top surface, a bottom surface, and a pair of first side surfaces connected to a pair of second side surfaces via corner surfaces. The cutting insert has a rotational axis of symmetry, a first axis extending along the first side surfaces and second axis extending along the second side surfaces. Opposite corners of the cutting insert are provided with a first pair of corner edges defined between a first edge and an associated second edge. Proximate its leading end, the first edge has a main portion which, in a top view of the insert, extends inwardly toward the first axis at a first angle. In a side view, the first edge slopes downwardly from the corner edge in the direction of the base surface. The associated second edge, in the top view of the insert, extends from the corner edge in an outward direction relative to the second axis.

Abstract: An edge finishing system for items such as polycarbonate panels. The system includes a multi-purpose edge-finishing tool which trims and smoothes the edges of a workpiece. The tool includes a contour cutter portion having a concave toroidal surface and a straight cutter portion having a cylindrical shape. A flute extends generally along with the tool's axis and defines a straight cutting edge and contour cutting edge. The system may include a fixture with vacuum cups nested within a platform so as to secure a contoured workpiece by static friction, permitting edges of the workpiece to be both trimmed and smoothly finished using a multi-purpose edge finishing tool, without marring or disfiguring the surface of the workpiece.

Abstract: A milling insert and a milling insert tool for chip removing machining. The milling insert includes at least two teeth. The milling insert has substantially a disc shape and includes a topside and an underside. The milling insert in its entirety is formed of cubic boron nitride.

Abstract: A tangential cutting insert has an insert body provided with a convex upper surface, a bottom surface provided with a cylindrical insert protrusion, and a peripheral side surface including a pair of opposing major side surfaces and a pair of opposing minor side surfaces. A sloped, major cutting edge in formed at the intersection of each major side surface with the top surface, the rake surface being formed in the major side surface. The bottom surface is provided with an insert protrusion abutment surface for seating the cutting insert. An insert recess is formed in the cylindrical insert protrusion, and this recess communicates with the insert's through bore. The cutting insert is seated in an insert pocket with the insert protrusion abutment surface in abutment with the pocket case. A cylindrical pocket protrusion rising from the pocket base and having a threaded bore formed therein enters the recess and is aligned with the insert's through bore.

Abstract: An indexable cutting insert includes a first component with an outer or top surface and side surfaces. A third component is mirror symmetric with respect to the first component about a vertical or y-axis of the cutting insert. A second component is disposed between the first and third components. Multiple cutting edges are defined at an intersection between the side surfaces and the top surface, wherein the cutting edges define a positive axial rake angle. In one embodiment, the first and third components are in the shape of a polygonal with a star appearance, and the second component is in the shape of a square. The first and third components are offset from one another by a first offset angle, while the second component is offset from the first and third components by a second offset angle to allow the cutting insert to be indexable.

Abstract: A cutting insert is retained in a cutting tool through a combination of resilient clamping and abutment by a threaded fastener. The threaded fastener, which abuts but does not penetrate cutting insert, pre-loads the cutting insert against cutting forces, by biasing the cutting insert against a jaw of the cutting tool.

Abstract: A toolholder and cutting insert for a toolholder assembly wherein the cutting insert has a tapered shank which provides a resilient interference fit with a tapered section of a bore extending within the toolholder. Additionally, a rearwardly facing face on the cutting insert abuts with a forwardly facing surface on the toolholder to properly locate the cutting insert within the toolholder.

Abstract: An indexable cutting insert can be used for metal cutting processes in general and for radial and axial turning of a stepped square shoulder in particular. The cutting insert exhibits 180° rotational symmetry about three mutually perpendicular axes. The cutting insert has generally “S”-shaped cutting edges extending between raised and lowered corners. The cutting edges and side surfaces are concave in an end view of the cutting insert. The cutting insert enables radial and axial turning operations of a square shoulder with unlimited depth of cut.

Abstract: It is an object to provide a CBN cutting tool using cBN-based sintered bodies which shows high resistance to chipping even when a hard ferric workpiece which is difficult to cut is cut at a high feed rate for high-speed, high-efficiency machining, and which can provide a machined surface that shows superior surface roughness, and improved fatigue life and sealability. A cBN-based sintered body of a cutting tip has an arcuate nose 5, a rake face 6, flanks 7 and a negative land 9. One of the cutting edges 10 defined between the negative land 9 and the flanks 7 that serves as an end cutting edge forms an inclination angle ?? of not less than 20 degrees and not more than 35 degrees with respect to the rake face. Further, the cutting edges 10 are positioned such that they are the lowest at the apex P of the arcuate nose and gradually rise from the apex P toward two points Q1 and Q2, respectively.

Abstract: A throw-away insert includes: an upper surface; a bottom surface; two side surfaces formed with upper side surfaces and lower side surfaces; two end surfaces; four nose sections formed at the corners of the upper surface; a main cutting section formed from a ridge line positioned at the intersection between the upper side surface and the upper surface; a secondary cutting section formed from a linear ridge line positioned at the intersection between the end surface and the upper surface; and an axial support surface formed from a section of the end surface. The upper side surface is projected outward more than the lower side surface.

Abstract: In a ball end mill, cutting can be carried out with high precision, and abrasion or breakage of the cutting blade can be reduced. The ball end mill is provided with a cutting blade section having a cutting blade, which is U-shaped in front view, at the end section of a shank. The cutting blade is provided on a flat surface deviated by a predetermined distance from the shank axis, and comprises blade faces having rake faces, which become negative angles at the time of cutting. In cross-section intersecting the cutting blade, all the blade faces have the same shape.

Abstract: A throw-away insert includes: an upper and bottom surface; two side surfaces; two end surfaces; a main cutting section formed from a ridge line positioned at the intersection between the side surfaces and the upper surface; a secondary cutting section formed from a ridge line positioned at the intersection between the end surfaces and the upper surface; an axial support surface supported by an insert pocket of a cutter body; and noses formed at the corners of the upper surface. The corner angles of the noses when seen from above are essentially right angles. The axial support surface is formed as a section of the end surface. The secondary cutting section is parallel to the ridge line at the upper end of the axial support surface and the bottom surface. The upper end of the axial support surface is positioned so that it is projected more in the direction of the longitudinal axis of the main cutting section than the ridge line of the upper end.

Abstract: This insert type cutting instrument includes: an insert formed as a flat polygonal plate, and which has an upper surface formed as a rake surface and a lower surface; an instrument main body which has a recessed portion formed on an outer side surface of a head portion of the instrument main body; and an insert seat formed on a wall surface of the recessed portion facing in a normal rotation direction of the instrument main body, and to which the insert is attached so that the upper surface of the insert faces in the normal rotation direction of the instrument main body. A first through-hole and a second through-hole are formed in the insert. A first screw hole and a second screw hole are formed in the insert seat of the instrument main body so that the first screw hole separates from the second screw hole in an axial direction of the instrument main body.

Abstract: A tangential milling cutting insert has two identical opposing end surfaces with two identical opposing major side surfaces of a generally parallelogrammatic shape and two identical opposing minor side surfaces extending between them. An ambidextrous tangential cutting insert has two non-identical end surfaces and two opposing major side surfaces of a generally trapezoidal nature. In either cutting insert, each end surface has a peripheral cutting edge and four corners of which two diagonally opposed corners are lowered and the other two are raised. Each end surface has four separate planar regions arranged in pairs, the planar regions do not protrude relative to the surrounding end surface and the two planar regions of a given pair of planar regions slope in opposite directions with respect to a median plane of the cutting insert.

Abstract: In this insert, in addition to the insert being formed so that the cutting edge is twisted at a helix angle within the range of 5° to 25° about the axis when the insert is attached to the insert mounting seat, the thickness of the insert body at the flank located on a straight line, which passes through the center of the rough hemisphere formed by the rotational locus of the cutting edge and forms an angle of inclination of 90° relative to the axis, is set to be within the range of 0.5 D to 0.9 D relative to the thickness D of the rough plate that composes the insert body. As a result, since a comparatively gentle but adequately large helix angle is imparted to the cutting edge, cutting resistance decreases. In addition, since the thickness of the insert body at the flank on the rear end side of the insert body is not excessively thin, the rigidity of the insert body is adequately secured.

Abstract: The invention provides a shape member manufacturing apparatus and a shape member manufacturing method which aims at cutting and grinding a joint projection 8B formed when a plurality of shape members are joined together by welding or friction stir welding, in a short time with high accuracy. A plurality of mounts 11 having a side structure 8 placed thereon are arranged in the longitudinal direction of the side structure. A joint projection 8B of a welded portion or a friction stir welded joint is formed on the surface of the side structure 8 in its longitudinal direction. A carrier 100 travels in the longitudinal direction of the side structure 8. Columns 105 are installed in a girder 103 of the carrier, and a milling cutter device 80 and a grinding device 90 are installed in lower portions of the columns 105. A milling surface of a milling cutter 81 of the milling cutter device 80 has a circular-arc shape with a radius R.

Abstract: A cutting insert 1, 1?, comprising opposite insert planes E1, E2 of a base 2 of one base area 3 wherein a conical surface section 4a of a lateral face 4 and the base area 3 facing the same form an acute angle alpha while forming a cutting edge 5, while a planar surface section 4b of the same lateral face 4 forms an obtuse angle beta with the opposite base area 3. The cone axis 6 of the conical surface area 4a lying in the insert plane E1, E2 runs off-set in parallel to the center insert axis 7 lying in the same insert plane E1, E2 while forming an off-center arcuate profile of the cutting edge 5. A milling cutter 17 comprising a number of such cutting inserts 1, 1? is characterized in that a cutting insert 1, 1? preferably disposed on the periphery of the center line M of a tool support 16 is off-set from the center line M by an angle phi equal to 5±3 degrees.