Abstract: In accordance with the present invention, there is provided a cutting tool having a cutting tool insert which is automatically rotationally indexable. The cutting tool includes a shank and an indexable cutting tool insert rotatably connected to the shank. The insert includes a plurality of cutting edges and side surfaces therebetween. The cutting tool is also provided with an indexing device, lock pin, cam plate and eccentric cam pin. The indexing device comprises a sliding key and a pair of spring metal legs attached thereto for engaging a serrated portion of the lock pin to which the cutting tool insert is attached. The indexing device is effective for indexing the insert on the lock pin upon rotation of the cam pin which effects a lateral movement of the cam plate along the longitudinal axis of the shank whereby the cam plate engages the sliding key causing it to also move laterally to engage the indexing legs on the lock pin resulting in rotation of the lock pin and the cutting insert attached thereto.
Abstract: A rotary cutting tool consists of a cutting body portion having a longitudinal axis and a plurality of blades separated by flutes extending the length of the cutting body portion. Each of the blades have a leading face side, a trailing face side, and a relieved land surface bridging the leading face side and trailing face side. The relieved land surfaces are interrupted by a plurality of spaced V-shaped notches to form a plurality of cutting edges at the intersection of the leading face side and the relieved land surface. The plurality of spaced V-shaped notches further define a plurality of cutting teeth having a leading face edge, a trailing face edge, and a flat land therebetween. A notch relief groove generates a positive relief at the plurality of cutting edges, leading face edges, and trailing face edges such that the cutting performance of the rotary cutting tool is significantly enhanced.
Abstract: An insert rotary cutter for processing a metal workpiece includes a cutter body of a generally circular cross-section having an axis of rotation therethrough. The cutter includes one or more cutter inserts releasably mounted on a periphery of the cutter body. The insert includes a generally quadrilateral plate defined by a front face, a rear face disposed generally parallel to the front face and four side faces. The insert has a pair of main cutting edges defined by the front face and one pair of the opposite side faces. The pair of opposite side faces serve as respective rake surfaces for the main cutting edges. Each of the rake surfaces is convexly curved in such a manner that the width of the insert between the rake surfaces is larger at a central portion of each main cutting edge than at opposite ends of the main cutting edge.
Abstract: The invention relates to a tool preferably for turning, and an insert therefor. The tool comprises a shank (11) upon which a loop-shaped outer disc (12) is secured. An inner disc (13) is displaceably arranged between the arms of the outer disc (12). A screw (15) is arranged to push the inner disc (13) forwards relative to the outer disc during inward screwing, such that the fore ends of the inner disc force the lower face of the insert against the upper face of the shank (11). The insert (14) is provided with a hole which is arranged to be wedged up on a pin (36) extending in the hole during a forward movement of the insert at the same time as the pin and the hole comprise cooperating surfaces to force the lower face of the insert against the upper face of the shank.
Abstract: The invention relates to a truncation apparatus and a process of truncating tubes. The truncation apparatus includes a mandrel, a means for advancing the tube to be truncated along the mandrel, at least one knife positioned in proximity to the free end of the mandrel, a slide moveably mounted on the mandrel and an exterior abutment whose distance with respect to the knife is adjustable, in addition to at least one reference system which is longitudinally adjustable adjacent the mandrel and defines predetermined and adjustable lengths between the front end of slide and the knife, and is provided with means to stop the longitudinal displacement of the slide in a manner so as to define a selected length for the last truncated portion of the tube. A method for truncating tubes wherein a length of tube is positioned on a mandrel and cut into at least a first section including one of the end edges of the tube and a last section including the other end edge of the tube.
Abstract: A ball end mill cutter comprises a mill body and a shank portion. The mill body comprises a tapered or non-tapered reference cylindrical surface, a reference semi-spherical surface on the end of the latter and cutting edges continuing between the reference cylindrical and semi-spherical surfaces. A random point on the cutting edges on the reference semi-spherical surface is expressed:When a reference latitudinal plane defines the junction of the reference cylindrical and semi-spherical surfaces, a Serial reference longitudinal (meridian) plane intersects the reference latitudinal plane; a latitudinal angle .gamma. lies between the reference latitudinal plane and a radius line drawn to the reference semi-spherical surface; a helical angle .alpha. lies between a tangential line of a helical cutting edge and the reference longitudinal plane; a longitudinal angle .beta.
Abstract: Conventional methods for reprofiling profiles of wheel sets by lathe machining predominantly produce continuous chips which interfere with the operating process, which can cause damage to the machine and which require continuous attention on the part of the operating personnel. The production of short fragmented chips through the use of suitable cutting edge geometry is impossible because of the continuous change of the cutting data during the reprofiling of such work pieces. In order to eliminate this problem, the profile is faced off or turned through the alternating use of hard-metal cutting materials and heavy-duty cutting materials and by adapting the cutting data to the cutting material then in use, wherein the heavy-duty cutting material is used in those profile regions in which a shock or sudden load on the cutting material is not expected, while the hard-metal cutting materials are used in the remaining regions.
March 17, 1987
Date of Patent:
December 8, 1987
W. Hegenscheidt GmbH
Dieter Lung, Werner Kluft, Jochen Fabry, Helmut Wittkopp, Theodor Dombrowski, Hartwig Klosterhalfen
Abstract: A portable multipurpose device for refacing both the make-up shoulder and the secondary shoulder of a two-shoulder tool joint, and for milling the outside surfaces of tool joints and pipes. The device uses a fixed cutting blade and rotates the tool joint to reface the make-up shoulder. The device holds the tool joint steady and uses rotating cutting blades to reface the secondary shoulder.
Abstract: A cutting insert (20) for chip forming machining has at least one cutting edge (21) created by the transition between an upper face (22) and a side face (23) of the cutting insert (20), said upper face (20) being a rake face and the side face (23) being a flank. The rake face comprises a chip upsetting face arranged adjacent to the cutting edge (21) and a curved chip breaking face (25) arranged adjacent to the chip upsetting face (24). A number of mutually separated along and inside of the cutting edge (21) located depressions (27) are arranged to bridge a border line (26) between the chip upsetting face (24) and the chip breaking face (25).
Abstract: A bar puller having a body which mounts a pair of rockers which project forwardly to effectively straddle a bar. The rockers mount rollers on the free ends thereof, the latter being provided with elastomeric surfaces to effect gripping of the bar. An adjusting mechanism coacts between the rearward free ends of the rockers to permit the minimum spacing between the rollers to be selectively adjusted to accommodate a selected bar size, and to permit the initial gripping pressure of the rollers on the bar to be selectively adjusted.
Abstract: An expandable wedge assembly which releasably secures a cutting blade or wafer like indexable insert in a pocket of a cutting tool. The wedge assembly includes flexible legs which expand or flex outwardly to secure the insert against a wall of the pocket and which unexpand or unflex to release the insert for indexing or replacement. Preferably, a screw and ball means movable in a bore in the wedge effect the flexing and unflexing of the wedge. A locater assembly for positioning the insert in the pocket also can be provided. Preferably, the structure and operation of the locator is similar to the structure and operation of the wedge.
Abstract: A metal cutting tool having an exchangeable cutting insert mounted on a replaceable cartridge seat releasably fitted in a tool holder of the cutting, the cartridge seat comprising a body portion with a receiving pocket formed therein, an axially directed external surface of the body portion and a substantially planar rear surface thereof; the receiving pocket being formed with a substantially planar insert receiving surface; the tool holder being formed with an insert receiving cavity having an axially directed internal surface adapted to receive the body portion and a substantially planar end surface adapted to abut said rear surface; one of said axially directed surfaces being substantially cylindrical and the other being formed with three suitably located, axially directed protrusions so that upon the screw coupling together of the cartridge seat in the receiving pocket the body portion pivots about its region of abutment so as to be clamped against the protrusions.
Abstract: A steel roughing grade coated cemented carbide cutting tool comprises WC grains equal to or less than 70 w/o of the tool substrate, from about 5 to about 10 w/o of a cobalt bonding phase and the remainder being metal carbide grains selected from the group TiC, TaC, NbC, HfC and combinations thereof. The average WC grain size is from about 0.9 to about 1.3 microns and less than 10% of the WC grains have a size less than 0.5 microns. The coated cemented carbide tool is coated with an adherent refractory coating layer. The coated cemented carbide cutting tool can be used to machine steel at rough and heavy rough cutting conditions.
December 19, 1986
Date of Patent:
November 24, 1987
GTE Laboratories Incorporated
Sergei-Tomislav V. Buljan, Helmut Lingertat, J. Gary Baldoni, II, Vinod K. Sarin
Abstract: A lathe-mounting apparatus defining a cylindrical core having an enlarged cylindrical termination at one end thereof and a separate slidably-mounted cone at the opposite end. The cone is adapted to slide onto the smaller end of the cylindrical core, the smaller end of the cone preceding the larger end, whereby a brake disk, or other similarly shaped cylindrical article, mounted on the cylindrical core between the enlarged termination and the cone, may be cut or resurfaced without significant vibration during rotation of the article.
Abstract: Disclosed is a method directed particularly to improving a modified threaded buttress collar. The method is also of value with any internally threaded member having a seal ring groove therein. The method specifically deals with the removal of the feather edge thread created when a seal ring groove is placed within an internally threaded member. Such groove usually provides residence for a seal ring. When the groove is placed in the internally threaded member there is created a feather edge thread immediately adjacent the groove. This feather edge thread is easily deformable and can create severe galling problems within the coupling.The feather edge is removed, preferably, in stepped fashion utilizing a machining tool such as a grooving tool within a computer numerically controlled lathe. The grooving tool is set such that as the coupling turns in the lathe, the movement of the grooving tool matches the pitch and helix of the threads and the speed of the lathe.
August 29, 1986
Date of Patent:
November 24, 1987
Dieter Hellnick, Karl J. Victor, Gregory K. Otten
Abstract: A butterfly-valve disc (10) is reconstituted by applying welding metal about its edge, rotating the disc with a lathe, and working the disc edge with a lathe tool. A spinner apparatus adapts the butterfly valve disc to be turned on the lathe. The spinner apparatus comprises two spinner mechanisms (A and B) for respectively attaching to opposite sides of the disc. Each of the spinner mechanisms includes a block (38), an elongated centering shaft (42) slidably mounted on the block, a spinner bar (48) fastened to the block for extending into a boss hole (22 or 24) on a side of the valve disc on which the spinner mechanism is to be mounted, and aligning bars (70 and 72) attached to the block for making contact with the side of the valve disc on which the spinner mechanism is to be mounted for holding a valve-disc axis (88) aligned with an axis (43) of the centering shaft.
Abstract: A clamping ring for use in pipe joints has an inside surface which is formed with generally peripherally extending indentations for axially fixing a pipe. In order to prevent an occurrence of dangerous stress concentrations in pipes in contact with such clamping rings and to permit such rings to be manufactured economically, the clamping ring is formed on its inside surface with a multiplicity of generally peripherally extending indentations, each of which extends only along part of the periphery of said inside surface, and said indentations are offset from each other in said peripheral directions and adjoint or overlap.
Abstract: A turret for an automatic lathe has a coupling sleeve connected with the driven shafts at each of a plurality of tool stations and actuated by a plunger displaceable parallel to the turret axis to couple the sleeve with the driven shaft when the tool is positioned at the working location. All of the driven shafts are continuously rotated by gearing connecting the driven shafts with the drive shaft extending along the axis of the turret.
Abstract: In polygonal cutting insert, each of the respective parallel faces of the insert include a single chip breaker scallop positioned at each corner wherein the scallop is formed as segments of conical frustum having a particular orientation.
Abstract: An improved centering system for turning lathes consisting of a conical device milled with four grooves, equally spaced, to accept corners of square stock to be turned which will provide for concentric turnings. The centering fixture is improved in that it receives the corners rather than the sides of widely varying stock to assure that the center will be obtained.