Abstract: A roll stand has a frame, a pair of small-diameter and substantially parallel working rolls defining a workpiece nip, and respective journal blocks supporting the working rolls in the frame for rotation about substantially parallel axes flanking the nip. These working-roll journal blocks and the respective working rolls can be axially shifted in the frame and the working rolls can be bent positively and negatively, that is respectively convex and concave toward the workpiece. A pair of large-diameter and substantially parallel backup rolls flank and bear toward the nip on the working rolls. Respective journal blocks support the backup rolls in the frame for rotation about substantially parallel axes flanking and generally coplanar with the working-roll axes. A strip is passed repeatedly in a multipass run through the nip generally perpendicular to the plane while the working rolls are pressed against the workpiece to reduce its thickness.

Abstract: An end preparation tool for pipe fittings includes an end preparation tool having a rotary cutting head with shaping bits carried thereon mounted on a base that also carries a universal clamping fixture for pipe fittings having end openings to be machined in preparation for welding. The clamping fixture includes workpiece engaging clamping pads that permit adjustment of the position of the workpiece relative to a pair of opposed clamping plates that normally secure the pipe fitting in place relative to the cutting head of the end preparation tool. The clamping fixture includes adjustment features that enable the fixture to be moved transversely relative to the cutting head, along the rotary axis of the cutting head and about a vertical axis that permits indexing of the clamping fixture relative to the tool cutting head.

Abstract: Chip separation is assured while turning work pieces, by causing an oscillating movement of the turning or lathe tool during the work piece rotation. The tool oscillation is controlled in response to the work piece rotation and so that the tool oscillates periodically along or rather relative to a line defined by the feed advance vectors of the tool movement. The oscillation amplitude corresponds approximately to half the effective feed advance path for each work piece revolution. The wave length of the oscillation has a magnitude such that it itself or an integral multiple thereof, plus a half wave length, is equal to the momentary respective work piece circumference at the instantaneous point of contact between the tool and the work piece. Several ways are possible for imparting an oscillating movement to the tool support or tool supports.

Abstract: A cutter guide fixture for use in removing a top nozzle from the guide thimbles of a fuel assembly includes upper and lower plates coupled to one another for movement of the upper plate relative to the lower plate between upper and lower positions. The plates include aligned pairs of holes within which are mounted a plurality of cutters such that the cutting elements of the cutters are disposed in a common cutting plane. A pair of expansion locking pins are provided at a pair of diagonal corners of the lower plate for releasably attaching the fixture to the top nozzle and positioning the cutters in general alignment with a plurality of passageways defined in the adapter plate of the top nozzle and with a plurality of hollow upper end portions of the guide thimbles inserted and attached in the passageways.

Abstract: A blade for a cutting tool is provided having plane parallel faces with V-shaped upper and lower jaws, the jaws being separated at one plane parallel face by a web, the upper and lower jaws being shaped to receive and prevent lateral movement of an insert when retained by the jaws. The insert is shaped to cooperate with the blade. The insert has a cutting edge mounted on a cutting portion separated from the seat portion by a rebate.

Abstract: A machine tool, especially a lathe, has a pair of ways 2 and 3 of a longitudinal slide 6 and a pair of ways 4 and 5 of a tailstock, between which below ways 2 and 3 a headstock 8 is situated. Location of the axis of the object being machined below the plane of ways 2 and 3 of the longitudinal slide 6 enables passing with the longitudinal slide 6 over the tailstock, the object being machined and the headstock 8.

Abstract: Thread rolling dies for pointed fasteners having an improved working face contour which promotes displacement of blank material from the blank point area at an early stage in the thread rolling sequence to avoid excessive pressures in the die and blank at the finishing stages of the rolling sequence. Thread cutters include an extend section that presurfaces the rise angle of the die working face to produce uniform, improved thread profiles.

Abstract: A process for copying and threading in automatic square cycle, applicable to and/or incorporated into engine lathes in general, includes material removing machining of parts by copying method in automatic square cycle, providing during the machining an automatic feed system for depth of cut with programmable and progressive increments through electric means, cutting of threads on a surface of the machined parts in automatic square cycle, and providing during the cutting an automatic feed system for depth of cut with programmable and progressive increments through electric means.

Abstract: A portable lathe tool includes fixed and rotating split rings, the fixed ring arranged to be secured to a pipe workpiece, the rotating ring being relatively rotatable with respect thereto for carrying a tool capable of performing a machining operation on the workpiece as it is driven around the circumference of the latter. A bearing arrangement for supporting the relatively rotating ring on the fixed ring is disclosed as comprising a bearing ring having a sloping bearing surface for engaging the rear end area of the rotating ring for axially, radially and rotationally locating and guiding the rotating ring relative to the fixed ring. An adjustment system is provided for accurately locating and adjusting the position of the bearing ring relative to the fixed ring to permit compensation for wear and dimensional variations.

Abstract: A material removing tool wherein a substantially plate-like support of steel carries at least one annular cutter which is made of a harder metallic material capable of being soldered to the material of the support. The support has a centrally extending projection which is received in a complementary opening of the cutter, and the cutter has two or more substantially radially extending webs in register with grooves which weaken the cutter in the regions of the webs so that at least one of the webs breaks in response to soldering of the cutter to the support. The breaking of one or more webs is promoted by proper selection of the thermal expansion coefficients of the materials of the support and cutter. The provision of breaks in the webs, either as a result of bonding or as a result of utilization of cutter sections, ensures that each cutter section between two neighboring webs can be put to use independently of the condition of the other section or sections.

Abstract: The invention concerns a process for machining a joint element for steel tubes, intended in particular for the petroleum industry, containing a truncated surface (2) and at least one screw stop.

Abstract: An apparatus for feeding bars to a machine tool, in particular a multispindle lathe, comprising a plurality of pairs of opposed arrays of respectively stationary and movable jaws extending radially from a rotary drum, wherein the movable array of each pair can be distanced from the opposed, stationary array through the intermediary of a control system.The stationary arrays are formed of side-by-side sets of jaws extending radially in one piece from respective central hubs fitted onto the drum and there locked against rotation, whereas the movable arrays are secured to radial tongues swing-mounted on axles carried by the stationary arrays. The control system for the movable arrays is, on the contrary, carried by sets of radial tongues extending from respective central hubs which are also fitted and locked to the drum between the sets of jaws.

Abstract: This invention relates to a tool for use in carrying out a cutting process, and more particularly to a cutting tool formed so that it can be sued to cut an iron material of a high hardness and thereby obtain a mirror-polished surface thereon, the cutting tool being characterized in that it is formed by attaching a monocrystal of boron nitride to the tip thereof so that predetermined surface and orientation of the crystal are set suitably. To be concrete, the present invention is directed to a cutting tool in which monocrystalline boron nitride is used for a tip which forms a blade of the cutting tool, (111) surface of this boron nitride being used as a relief surface of the blade, <211> direction being used as a cutting direction; or a cutting tool of the same material, in which (100) surface of the boron nitride is used as a relief surface of the blade, <110> direction being used as a cutting direction.

Abstract: A machine bed for machine tools having two guides lying in separate planes each having two guide ways, namely an approximately horizontal main guide and an additional guide at an angle thereto, in which at least the guide ways of the main guide lie on intersecting tangents or parallels thereof, of a circle whose center is the same as the workpiece and/or tool center of rotation of the machine.

Abstract: A three-jaw chuck of a lathe is adapted to rectangular or square-shaped work pieces by a U-shaped adaptor placed on one of the jaws. The adaptor may be adjustable as to the distance between the jaw tip and the support surface for the workpiece. Alternatively, a set of adaptors of differing thickness can be provided for purpose of selection on a case-by-case basis.

Abstract: A portable lathe includes a bed, a removable headstock and a removable slidable fixable tailstock. The bed has a horizontal plane surface and a vertical plane surface at one end thereof. The horizontal surface has a central longitudinal guide way therethrough. The vertical surface has a plurality of bed holes horizontally disposed therethrough. The headstock has a plurality of first headstock holes horizontally disposed therethrough. The first headstock holes are equal in number to and aligned with the bed holes. The headstock has a plurality of second headstock holes horizontally disposed therethrough. A second headstock hole is adjacent each first headstock hole. A push bolt is associated with each first headstock hole, and the free end of the push bolt bears on the vertical surface. A pull bolt is associated with each second headstock hole and bed hole. The tailstock includes a locking mechanism and an alignment mechanism.

Abstract: Opposite ends of a silencer band having a plurality of weights attached thereto are coupled together by selective engagement of a clip member and one of the silencer band weights. To effect such engagement, the clip member comprises a connection portion including a pair of first leg members and an interconnecting first bight portion which together define a loop. Instead of being riveted to the silencer band, the clip member is also fixedly attached to another one of the silencer band weights by an attachment portion. The attachment portion includes second and third leg members each extending from one of the end portions of the first leg members and arranged in predetermined spaced apart parallel relation one to another. A fourth leg member reversely depends from the third leg member and defines a second bight portion.

Abstract: The invention relates to a process and an apparatus for positioning a point belonging to the cutting zone of a tool in a digitally controlled lathe.The process consists of obtaining the image of the contact point of the tool cutting zone in a virtual relative mark with two perpendicular axes and then bringing about coincidence between the origin of the relative mark and the rotation axis of the tool holder capstan. The process then involves bringing about coincidence between the chosen contact point and the origin of the relative mark. The contact point is then made to coincide with the intersection point of the axes of an absolute fixed reference mark.Application to the regulation of the position of a tool in a digitally controlled lathe.

Abstract: A portable lathe device is modular in character and can be employed for flange facing, line boring or other purposes. The spindle carrying the tool means is readily axially adjustable, and the radial feed rate for a facing head tool carrier is infinitely variable and reversable.

Abstract: The cabinet of the numerical control device contains a memory, a frequency changer, an amplifier and two correcting units. A programing station with keyboard and mounted on the cabinet enables programing the memory. The control device further comprises an encoder and a DC motor. It shall be associated with a lathe mechanically controlled by cams. The encoder records the successive positions of the camshaft and transmits these informations to the memory. In accordance with these informations the latter transmits mandatory instructions to the frequency changer and to the amplifier which modify the motor speeds and, consequently, those of the spindle and of the camshaft, to an extent dictated to the memory by the keyboard. At the beginning of particular machining steps the memory can activate the correcting units thus permitting to modify the instructions of the memory in order to find out the optimal speeds after some tests.