Abstract: A gear machining apparatus includes a rough working tool having a plurality of replaceable tool blades attached to a tool main body, such that the tool blades are arranged in a circumferential direction of the tool main body and blade tips of the tool blades are oriented outward in a radial direction of the tool main body, a finish working tool having a plurality of tool blades provided to a tool main body in a similar manner to the rough working tool, and machining controllers control to perform rough and finish machinings on the workpiece, such that the working tools are rotated on center lines in axial directions of the working tools, the workpiece is rotated on a center line in axial direction of the workpiece, and the working tools are relatively moved to the workpiece along the center line in the axial direction of the workpiece.

Abstract: A hobbing tool includes a hob body having at least one axially extending slot, and at least one cassette removably disposed in the at least one slot. The at least one cassette includes at least one seating recess having at least a bottom abutment surface and two side abutment surfaces. At least one cutting insert is removably mounted in the at least one seating recess. The at least one cutting insert has at least one bottom supporting surface and two side supporting surfaces that abut the bottom abutment surface and the two side abutment surfaces when the at least one cutting insert is received in the at least one seating recess. The hob body includes a plurality of axially extending slots. The hobbing tool also includes a corresponding plurality of cassettes removably mounted in the plurality of axially extending slots. Each cassette of the plurality of cassettes is identical to every other cassette of the plurality of cassettes.

Abstract: This sectional hob is provided with: a cylindrical hob body; a plate-shaped blade having a saw-toothed cutting edge, the blade being disposed in at least one attachment seat formed in an outer peripheral part of the hob body such that a direction of the cutting edge is parallel to a center axis direction of the hob body; and a plurality of wedge members configured to detachably-fix the blade disposed in the attachment seat to the hob body, the wedge members being installed in a recess formed on the outer peripheral part of the hob body, wherein the recess is adjacent to the attachment seat in a circumferential direction of the hob body, and the plurality of the wedge members are disposed in a line in the center axis direction in the recess.

Abstract: A milling tool includes a tool body having a peripheral surface and a central rotation axis. A number of cutting teeth protrude from the peripheral surface, a front end set of the cutting teeth arranged along a front end portion of an imaginary helix concentric with the central rotation axis, and a back end set along a back end portion of the helix. The cutting teeth engage the workpiece successively, starting with the foremost cutting tooth of the front end set. The back end set includes at least three along the helix adjacent cutting teeth arranged at a constant first radial distance from the central rotation axis. The front end set has at least two adjacent cutting teeth arranged at an along the helix non-constant second radial distance from the central rotation axis. The second radial distance is smaller than the first radial distance and increases successively along the helix.

Abstract: A cutting insert for a gear milling tool comprises an under side, an opposite upper side that forms a chip surface and is parallel to an extension plane (p), a circumferential edge side that connects the upper side and the under side. A centre axis (A) extends through the under side. A symmetry line (S) is perpendicular to the centre axis. A first cutting edge comprises a primary main cutting edge, a secondary main cutting edge—which are symmetrical in respect of the symmetry line—and a transverse end cutting edge between the primary and the secondary main cutting edge. A normal to the extension plane (p) forms an acute clearance angle with the edge side at least along the first cutting edge so that the cutting insert obtains a positive cutting geometry.

Abstract: Milling tool and milling insert kit are provided for the gash milling of a workpiece. The tool comprises a tool body that defines a rotation axis and has a first end, an opposite second end, and a peripheral surface that extends around the rotation axis between the first end and the second end. A large number of separated seats, which are arranged one after the other in the tool body along a line and receive one each of corresponding number of replaceable milling inserts, comprise a primary main cutting edge and a secondary main cutting edge that converge to each other. The milling inserts comprise outer milling inserts, which project from the tool body by a first length from the rotation axis, and inner milling inserts, which project from the tool body by a second length from the rotation axis. The first length is considerably greater than the second length.

Abstract: A hob having a helically curved tooth profile. A plurality of segments covering only a limited angle range are attached to a base body for forming the tooth profile. The segments abut each other in the circumferential direction of the base body, and the segments form rows in the direction of the longitudinal axis of the base body. The segments each comprise a segment foot and a segment profile disposed diagonally thereon. The diagonal arrangement of the segment profile forms a coiled slope of the helically curved tooth profile in each segment and the tooth profile can be built up simply by arranging the segments in rows in the circumferential and the longitudinal directions.

Abstract: The invention relates to a milling tool for gear milling. The tool body is equipped with tangentially mounted milling inserts having four cutting edges and two holes, only one of which is utilized for a fixing screw in two of totally four index positions. By locating a screw hole in the seat of the milling insert at a distance from the radial support surface of the seat that is greater than the distance between an individual hole and a distal end of the milling insert, a clamping force is provided by means of the inherent elasticity of the fixing screw. In such a way, the milling insert is pressed against the radial support surface. By means of a transversal eccentricity, the milling insert is also pressed against a tangential support surface in the seat. By means of this construction, the two holes in differently long milling inserts can be formed with equally large distances from distal ends. Thereby, one and the same tool body can be equipped with differently long milling inserts.

Abstract: A thread-milling cutter including a tool holder (2) and at least one cutting insert (3) with a longitudinal cutting edge (30) mounted on it. The tool holder (2) includes at least one pocket (20) extending essentially in an axial direction (A) and adapted for receiving the at least one insert (3). The cutting insert (3) has at least one positioning plane (31) on a first abutment surface of the insert (3) opposite the cutting edge (30) for a radial positioning of the insert (3) in the respective pocket (20). At least one protrusion (32) is provided on the abutment surface, a side surface (320) of the protrusion (32) being oriented at an angle (?) to the axial direction (A) of the cutter (1) and adapted for contacting a surface (22) of the pocket (20) for an axial positioning of the insert (3). Also described is an insert for a thread-milling cutter.

Abstract: The invention relates to a form blade (10) for the milling of bevel gears, with a base body (11) which has a receiving area and with at least two cutting strips (13.1, 13.2) with a cutting edge (18.1). The cutting strips (13.1, 13.2) are detachably fixed in corresponding receiving areas (12.1, 12.2) of the base body (11).

Abstract: A face milling cutter method for manufacturing various hypocycloidal bevel gears that is characterized in that the following steps are performed to manufacture a first bevel gear: equipping a universal face milling cutter in a first configuration with a first number of cutter groups that corresponds to a first number of passes. A first bevel gear is then produced in the continuous partial method using the universal face milling cutter in the first configuration. The following steps are performed to manufacture a second bevel gear: equipping the same universal face milling cutter in a second configuration with a second number of cutter groups that corresponds to a second number of passes. The second bevel gear is then produced in the continuous partial method using the universal face milling cutter in the second configuration.

Abstract: Bar cutter head (20) for receiving multiple bar cutters of a first bar cutter set, the bar cutter head (20) having n receptacle openings (25.1-25.6) for receiving n bar cutters of the first bar cutter set, which are all situated along a first concentric cutter head nominal circle having a first cutter head nominal radius (r1). A first spiral-toothed bevel gear (11) can be milled in the single-indexing method in this configuration. The bar cutter head (20) additionally has m receptacle openings (26.1 -26.6) for receiving m bar cutters of a second bar cutter set, which are all situated along a second concentric cutter head nominal circle having a second cutter head nominal radius (r2). A second spiral-toothed bevel gear can be milled in the configuration having the m bar cutters. It is thus a universally-usable cutter head (20).

Abstract: Milling tool has a tool body with a fixing end, an opposite outer end, and a peripheral surface. The tool body comprises a large number of separated seats arranged at the peripheral surface one after the other along a helix line having a constant pitch. Corresponding large number of replaceable milling inserts comprise an under side, an opposite upper side forming a chip surface, a circumferential edge side, and two pairs of main cutting edges. The chip surface extends in an extension plane that comprises the main cutting edges. Each seat receives one of the milling inserts and comprises a support surface allowing support to the milling insert projecting from the tool body for cutting engagement with a gash of the workpiece. The chip surface extension plane of each milling insert has a normal parallel to the tangent of the helix line where the same intersects the extension plane.

Abstract: A milling cutter tool including a basic body and a replaceable cutting body. The cutting body includes a set of teeth which are situated with a uniform partition along one of a pair of opposite sides of the cutting body. The cutting body is fixed in a pocket having a support surface against which the underside of the cutting body is mounted. The support surface of the pocket, and the underside of the cutting body, are tipped at a negative axial angle ? of at least 0.5° in relation to a center axis (C1) of the basic body such that the teeth of the cutting body are located along a common, phantom helical line (X), which is concentric with the center axis (C1) of the basic body and has an even pitch which corresponds to the partition between the teeth.

Abstract: A hob having a helically curved tooth profile. A plurality of segments covering only a limited angle range are attached to a base body for forming the tooth profile. The segments abut each other in the circumferential direction of the base body, and the segments form rows in the direction of the longitudinal axis of the base body. The segments each comprise a segment foot and a segment profile disposed diagonally thereon. The diagonal arrangement of the segment profile forms a coiled slope of the helically curved tooth profile in each segment and the tooth profile can be built up simply by arranging the segments in rows in the circumferential and the longitudinal directions.

Abstract: A cutting tool having a two-sided cutting blade positionable in a tool holder to form a blade hob. The inventive cutting tool can be used to duplicate the generation action of single or multi-threaded, multi-gashed hobs. The two-sided cutting blade includes one or more tooth profile shaped cutting teeth located at each end of a cutting blade body. The cutting teeth on respective ends are axially offset from one another. The cutting blade is moved to a number of generating positions to generate the desired tooth surface on a workpiece.

Abstract: A gear hobbing cutter system that includes a cutter head body having a plurality of cartridge-receiving slots arranged in pairs comprising an inside and an outside cartridge-receiving slot. Each pair of inside and outside cartridge-receiving slots are capable of receiving a respective inside and outside cartridge assembly. To ensure that the inside and outside cartridge assemblies are properly positioned within their respective cartridge-receiving slots, one of the dimensions, preferably the length, of the inside cartridge-receiving slot and its respective inside cartridge assembly of a pair is different than the outside cartridge-receiving slot its respective outside cartridge assembly so as to form an error proofing system.

Abstract: The invention relates to a milling tool. The milling tool has bearing and orientation surfaces for a substantially tangential reception of milling inserts. The receptacles of the milling tool can be arranged in adjacent manner axially symmetrically to the rotational milling axis of the milling tool. The milling insert can be eccentrically braced in the milling tool receptacle.

Abstract: A face hobbing cutter including a cutter body having a top surface and a bottom surface and a side surface extending between the top surface and the bottom surface. A plurality of slots are formed within the cutter body extending from the top surface inward into the cutter body. The slots are adapted to receive cutting blades wherein each cutting blade is fixed in position in the respective slot by a wedge clamping assembly. The wedge clamping assembly includes a wedge block and a wedge screw for operatively securing the wedge block within the respective slot. The wedge block includes an outwardly facing locking surface for engaging a side of the cutting blade. The face hobbing cutter further includes an adjustable stop. The adjustable stop is in communication with the slot to support the cutting blade at the desired height from the top surface of the face hobbing cutter.

Abstract: A triangular threading insert has a mount portion (60) with three sides forming locating faces (50, 52, 54) that lie on the three sides of an imaginary triangle (96) and has three cutting arms (21-23) with outer edges (80) for cutting threads. The outer edge of each arm projects sidewardly beyond the sides of the imaginary triangle, to leave locating faces of long length. The top face (110) of the mount portion forms a hexagon with the cutting arms projecting radially from three of the sides (71-73) of the hexagon, and with the other three sides of the hexagon extending parallel to the locating faces of the mount portion. Each locating face has a smaller height (H) than the thickness (T) of the insert, with concave border regions merging the top and bottom (124, 126) of each locating face to the top and bottom faces of the insert, and merging horizontally-spaced ends (134, 136) of each locating face to a cutting arm.

Abstract: A thread-milling cutter includes a cutting head with cutting insert pockets and thread-milling inserts received in respective pockets. An attachment portion integral with the cutting head is received in a drive coupling. Each insert includes a recess forming an abutment surface that is engaged by a screw to secure the insert in the pocket. The abutment surface is inclined in a manner causing the screw to push the insert deeper into the pocket.

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 with different projections which cutting tips each comprises a cutting edge, which is provided to form a thread top substantially between the cutting tips. The total projected length of the cutting edge is smaller than two thread pitches.

Abstract: An arrangement comprising a bore-type hobbing cutter and a holding arbor wherein the bore of the hobbing cutter has ground cylindrical centering surfaces at its ends and the arbor has complementary seating surfaces and wherein the hobbing cutter is axially chucked on the holding arbor by means of axial chucking means, where a preferably sleeve-shaped cage is disposed between centering surfaces and has a thickness which is smaller than the radial distance between centering and seating surfaces, and has an outside diameter which is smaller than the inside diameter of centering surfaces, the cage supports, in a circumferential direction, at least a number of prechucking elements, which are preferably metallic and are in contact with the associated centering surface and the seating surface, and said diameter and the distance between the contacting points or contacting lines of prechucking members are slightly larger than the radial distance between centering and seating surfaces.

Abstract: The invention relates to a milling tool. The milling tool has bearing and orientation surfaces for a substantially tangential reception of milling inserts. The receptacles of the milling tool can be arranged in adjacent manner axially symmetrically to the rotational milling axis of the milling tool. The milling insert can be eccentrically braced in the milling tool receptacle.

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 with different projections which cutting tips each comprises a cutting edge, which is provided to form a thread top substantially between the cutting tips. The total projected length of the cutting edge is smaller than two thread pitches.

Abstract: A cutter blade for use with a face hob type cutter for producing the teeth of spiral bevel and hypoid gear members by a continuous index, face hobbing process comprises a cutter blade shank having a cutting member provided at one end thereof. The cutting member includes a tooth cutting edge having a given axial pressure angle, and a relief edge adjacent the tooth cutting edge having an axial pressure angle greater than the axial pressure angle of the tooth cutting edge. The relief edge of the cutting member simultaneously forms a relief on the tip of the tooth of the gear member as the tooth is cut by the tooth cutting edge of the cutting member.

Abstract: A novel hob construction includes a plurality of blades and a cylindrical main body having opposite axial ends. Flanges including axially aligned slots for receiving the blades are located only upon the ends of the main body. A chocking material is provided over the circumferential extent of the main body and between the blades for forming an effective physical extension of the body for bonding the blades to the body and to each other.

Abstract: A milling cutter has replaceable cutting inserts mounted on a toothed disc or drum body. Seatings for the inserts on the teeth locate them at spaced intervals on the periphery of each tooth. The inserts of at least one tooth of the body are peripherally staggered in their seatings relative to the inserts on at least one other tooth such that the staggered and spaced inserts on the teeth have paths of rotation that intersect to define a continuous profiled cutting line. The inserts have their cutting edges ground in situ on the teeth to define the profile of the cutting line. By this method a finish quality profiled surface can be produced using cutting inserts that are initially of standard form.

Abstract: Two cutting tool inserts are fastened at each side of a cutting tool insert holder to have their active primary cutting edges aligned. A third cutting tool insert is displaced in relation to the other two cutting tool inserts in the cutting direction such that its active primary cutting edge overlaps in extent the active primary cutting edges of the two aligned cutting tool inserts. This produces an effective total length of the cutting edges which corresponds to the sum of the edge lengths of the three cutting tool inserts less the two overlapping regions. Should one of the cutting tool inserts chip or break off in the region of the overlapping active primary cutting edges, the planing or shaping of hardened gear tooth flanks of a roughed-out gear blank or workpiece can nevertheless be continued since such chipping of the cutting edge has no detrimental influence on the workpiece due to the overlapping.

Abstract: A heavy-duty hob for hobbing gears comprises a cylindrical body formed in its peripheral surface with generally axially extending grooves, and tooth-carrying bars, which extend in said grooves and carry cutting teeth which radially protrude from said body and constitute a helical array around the body. It is an object of the invention to avoid the disadvantages of known hobs, to provide the hob with easily replaceable cutting tips, and to permit the use of stable bar-shaped cutting tips which have no through bores and can be used in a plurality of positions and regardless of the module of the gear to be cut extend throughout the length of that side face of the associated tooth which engages the cutting tip.

Abstract: A hob for making gears comprises a cylindrical mill base and a plurality of helix-like tooth segments positioned on the surface of the mill base adjacent to each other and each having a number of tooth cutters with cutting plates of hard metal. Tooth segments may be interchangeable if they are worn out.

Abstract: A cutter blade for use in cutting metal is formed with a recess spaced behind the cutting edge on the cutting face to save expensive cutting material, to reduce the time and energy required to sharpen the cutter blade, and to lengthen the life of the sharpening tool. High density sintered powdered tool steel lends itself well to this construction, as do cast and forged tool steels.

Abstract: The body of a gear hob consists of a plurality of adjacent disc-shaped segments. A helix of successive cutting teeth extends around the body and is formed by the adjoining peripheries of the segments. First and second metal cutter plates are replaceably mounted on the teeth flanks. The first cutter plate is mounted at the top of a respective tooth flank and the second cutter plate is mounted on the opposite flank. The first and second cutters alternate along the helix at each side of the teeth and their cutting paths overlap.

Abstract: An inserted-blade cutter assembly uses a laterally projecting finger formed integrally with each removable blade which is engagable with a reference-positioning surface on the cutter body to precisely position the blade. Two locking caps have frustoconical surfaces which engage similarly shaped end portions of the blade members providing a sufficient radial force to counter centrifugal forces and thereby retain the blades in the body member. The locking caps also provide a sufficient axial force to keep the blade finger in contact with the reference-positioning surface to provide precise cutting tooth alignment during the cutting operation. This structure obviates the need for individual fasteners, shrink fits, or adhesives thereby facilitating blade removal and replacement.

Abstract: A hob is formed of a body equipped with the seats of machining segments, each of the seats being profiled in a form of two mutually skew planes, where one plane is tangent to a cylinder circumscribed by a radius equal to 0.7 of a radius of the outer diameter of the hob, and the other plane forms with the first one an exterior acute angle, bigger than 30.degree.. During sharpening of the hob, the machining segments rest on identical flat strips. The profiles of the seats in the body and the machining segments of the hob enable fixing of these segments both for the purpose of sharpening and for the operation in the same body, without an application of complicated mechanical catches.

Abstract: A milling cutter comprising a cylindrical body having a bore adapted for receiving a driving shaft in coupled relation and a periphery with uniformly distributed trapezoidal cavities therein with inset cutting blades in the cavities. The cutting blades have base sections of trapezoidal shape corresponding to that of the cavities and the blades are insertable in two different positions, one being an endless screw position in which the periphery of the teeth of the blades are inscribed in a circle concentric with the axis of the body and the other being a spur position in which the tips of the teeth are inscribed in a circle concentric with the axis of the body. The base sections of the blades have surfaces facing respective surfaces of the cavities and respective pairs of the surfaces are formed with longitudinal grooves cooperatively defining common spaces in which axial keys are engaged to lock the respective blades in the cavities radially.

Abstract: A rotary cutting tool for forming fluted rotors and the like comprising a cylindrical body having a plurality of metallic carbide cutting blades which are detachably mounted on the circumference of the body. The blades are arranged along a helical line with respect to the axis of rotation of the cutter body. The blades may be circumferentially spaced apart equidistant, one blade from each adjacent blade, to form only one turn of the helix and whereby each blade may be easily ground to a precise cutting edge contour while mounted on the cutter body. The cutting edge contour of each blade may be such that each blade cuts portions along the entire profile of the form produced on the workpiece.

Abstract: A rotary cutting tool for forming fluted rotors and the like comprising a cylindrical body having a plurality of metallic carbide cutting blades which are detachably mounted on the circumference of the body. The blades are arranged along a helical line with respect to the axis of rotation of the cutter body. The blades may be circumferentially spaced apart equidistant, one blade from each adjacent blade, to form only one turn of the helix and whereby each blade may be easily ground to a precise cutting edge contour while mounted on the cutter body. The cutting edge contour of each blade may be such that each blade cuts portions along the entire profile of the form produced on the workpiece.