Abstract: The invention relates to an improved micrometric device for finishing high precision bores. The device has a substantially cylindrical body having a displacement system arranged in an interior thereof. The displacement device actuates on a tool holder which is then displaced in the same direction of the radial component of the workforce. The micrometric device is also provided with a backlash suppression system. In accordance with the present invention, the micrometric device has an upper cylindrical body mounted and fixed to a lower cylindrical body, both of which coaxially envelop a graduated drum. The graduated drum, in turn, is coaxially mounted and connected to a micrometric screw arranged longitudinally in the interior of the micrometric device. In the interior of the micrometric device, and connected to an upper extension of the micrometric screw, a conversion mechanism is arranged which changes a rotating movement of the micrometric screw into a linear movement of a movable crossbeam.

Abstract: A machine for taper threading the end of a bar such as reinforcing bar used in concrete construction utilizes a power operated vice to clamp and feed the bar end axially into a rotary head which contains chaser tooling holders which open uniformly on the bar end as the head rotates. The rotary head is axially stationary but contains an axially movable key or linear cam which engages a readily removable transversely extending control rod assembly in turn moving the chaser holders. Axial movement of the power vice and thus the bar end at a controlled axial speed with respect to the rotary speed of the head moves the key to cause the movement of the chaser holders. The chaser holders in addition to supporting the thread cutting chasers also support ahead of the chaser an indexable triangular insert to pre-cone the bar end.

Abstract: A boring apparatus comprises an elongate support body adapted to be rotatable by a machine tool spindle, a cutter mounting body releasably securable to the end of the support body remote from the machine tool spindle and is provided with a cutter guide which slidably receives a cutter therein which is constrained by the guide to be displaceable in an adjustment direction inclined to the rotational axis of the elongate support body. An adjustment member is disposed within the elongate support body and is movable along an axis substantially coaxial with the rotational axis of the elongate support body, and an interengaging coupling on the adjustment member and on the cutting tool is provided whereby movement of the adjustment member along its axis of motion induces movement of the cutting tool in its adjustment direction.

Abstract: A machine tool that includes a rotary spindle having a radially movable cutter element. An axially movable drawbar within the spindle is used to move the cutter element to its retracted or extended position. A harmonic drive unit is carried on the spindle for imparting rotary movement to a cam element that has a driving connection with the drawbar. The harmonic drive unit can be controlled through a remotely-operated brake that is adapted to be selectively engaged with a reaction member that forms part of the harmonic drive unit.

Abstract: A machine tool and method for simultaneously boring, facing and back boring three bores in a differential carrier with three tools that rotate coaxially with their spindle axes. Each tool has a first slide at its free end that carries a first cutting insert for back boring a first diameter and then generating a radial face that serves as a bearing seat on the differential carrier. Each tool also has a second slide carrying a second insert for boring a second diameter. The construction, arrangement and movement of the two slides are correlated with each other to maintain the tool in balance during extension and retraction of both slides. In the preferred embodiment the first insert must be retracted when it is advanced into the carrier, extended to back bore and then retracted to generate a radial face. The second insert is at the same location circumferentially of the tool. One insert is retracted while the other insert is extended, and vice versa, to maintain the tool in balance.

Abstract: Apparatus for machining a valve seat and valve stem guide all from the valve seat side of a head or block. The valve seat is machined in one pass by a single point cutting tool which is moved on two axes and, the valve guide bore is machined by a reamer. The movements of the single point cutting tool and reamer are numerically controlled.

Abstract: A machining apparatus including a rotating shaft disposed rotatably about an axis thereof, an eccentric rotating member supported by the rotating shaft rotatably about an axis thereof which is offset from the axis of the rotating shaft, at least one cutting tool which is supported by the eccentric rotating member such that each cutting tool is rotated with the eccentric rotating member and such that the cutting edge of each cutting tool is offset from the axis of the eccentric rotating member, and a rotating device supported by the rotating shaft, for rotating the eccentric rotating member relative to the rotating shaft, and thereby changing the cutting edge position of each cutting tool in the radial direction of the rotating shaft.

Abstract: A high speed spindle has a motor and tool adjustment mechanism which aligns spaced bearing means to rigidly support the spindle shaft at high speed operation and to prevent excessive lateral loading of a bearing unit of the tool adjustment mechanism. The unitary motor and tool adjustment mechanism are joined together as a single unitary assembly which is mountable on a machine tool base without requiring alignment and pre-assembly of the motor and tool adjustment mechanism at field locations.

Abstract: A boring tool is made from simple bar stock without significant external machining of the tool body. By providing a longitudinal bore which intersects a transverse slot, a longitudinally slidable wedge with splines can cooperate with a disc carried by a tool bar slidably received in the transverse slot. To ensure the most precise alignment between splines of the wedge and splines of a cooperating disc in the tool bar, the disc of the tool bar is attached to the tool bar with epoxy cement while the splines of the disc are engaged with the splines of the wedge. With the splines of the wedge being angularly offset from the longitudinal axis of the wedge, translation of the wedge will ensure accurately controlled movement of the tool bar.

Abstract: In a precision adjustment head for a machine tool a slide (9) is radially adjustable in a radially extending guide (8) in a substantially cylindrical housing (1), on which slide a tool carrier (11) can be fixed. In the housing (1) the positioning member 5 is axially displaceable and a positioning element (14) is fixed to the slide (9), with a groove (15) extending obliquely to the housing axis A and tapering to its groove bottom (15a), in which engages a projecting insert (19) provided on the positioning member (5), tapering towards its free end in correspondence with the groove cross section. The insert (19) is adjustable and fixable relative to the positioning member (5) perpendicular to the groove bottom (15a).

Abstract: A boring tool is made from simple bar stock without significant external machining of the tool body. By providing a longitudinal bore which intersects a transverse slot, a longitudinally slidable wedge with splines can cooperate with a disc carried by a tool bar slidably received in the transverse slot. To ensure the most precise alignment between splines of the wedge and splines of a cooperating disc in the tool bar, the disc of the tool bar is attached to the tool bar with epoxy cement while the splines of the disc are engaged with the splines of the wedge. With the splines of the wedge being angularly offset from the longitudinal axis of the wedge, translation of the wedge will ensure accurately controlled movement of the tool bar.

Abstract: A self-opening diestock which is characterized by the fact that it comprises a rotating operating part which carries the thread-cutting dies that are capable of radial travel and have two grooves in which are accommodated the heads; means for exerting an outward thrust upon the cutting dies; means for restraining the cutting dies, where both said means are embodied onto the operating part; a flange which is capable of axial travel and carries the head of the means for restraining, and a stop piece attrached to the flange, which is capable of axial travel, and upon which the end of the pipe to be threaded rests.

Abstract: A tool for cutting an annular groove on the interior of a substantially cylindrical surface comprising a primary body having a pointed base for anchoring the cutting tool and a portion for being grasped and rotated by a power source, at least one groove cutting assembly attached to and extending horizontally from the primary body towards the internal cylindrical surface, and means coupled to said primary body and moveably spaced from the cutting assembly for selectively urging a portion of the cutting assembly outwardly a predetermined distance thereby enabling a groove of predetermined depth to be made on the interior of the interior cylindrical surface when the primary body is rotated.

Abstract: An automated machine tool is provided having an adjusting apparatus for changing the cutting radius of a cutting tool by changing the tool's position on a horizontal axis perpendicular to the axis of rotation of the cutting tool. A constant cutter feed rate is maintained by adjusting the rotation rate of the cutting tool in proportion to the distance of the cutting tool from the centerline of rotation.

Abstract: An interchangeable machine tool holder unit for use in a machining apparatus for the support of a machining element, for example, a cutting bit, which includes an elongated rotary body adapted to be driven in one direction about the longitudinal axis thereof, a tool holder supported in end-to-end fashion by the rotary body for movement in a direction radially of the rotary body, an axially displaceable member axially displaceably carried inside the rotary body, and an indexing mechanism for causing the axially displaceable member to move in the axial direction each time the rotary body undergoes one complete rotation to permit the tool holder to move in the radial direction.

Abstract: A boring head of a multiple-operation machine tool comprises a housing which accommodates a carriage carrying a mandrel for a cutting tool, and having a slanted surface to interact with a slanted surface of a rod arranged in the housing coaxially with the carriage and kinematically coupled to a drive which moves it in the axial direction. The housing also accommodates a fork arranged coaxially with the former and pressed against the carriage by a spring. At the ends of the fork are two slanted surfaces which are symmetrical with respect to the axis of rotation of the boring head. The fork interacts with the carriage on lines found in a plane extending through the axis of rotation of the boring head. The head further incorporates a rocker whose axle is installed in the housing on the side facing the two slanted surfaces of the carriage. The axle is parallel with the axis of rotation of the boring head.

Abstract: Metal working cutting tool with a cutting insert which can be inserted in a recess of a tool shaft and fastened therein by means of a clamping jaw, whereby the cutting insert has the approximate shape of a prism with two diagonal opposite cutting edges and along one of the two lengthwise edges are adjacent cutting faces, which form an acute angle with the respective opposite principal cutting pressure and support surface, so that the angle opens towards the pressure-feed and support surface, whereby in the area of the joint lengthwise edge of the cutting face, there is incorporated in the cutting insert a continuous longitudinal groove of which one of the side walls serves as a support area for the relief-cut pressure-feed and support surface of the recess of the tool shaft, and whereas the respective other side wall forms the support surface for a recessed clamping jaw which is located in a diagonal groove of the tool shaft.

Abstract: In the known, adjustable, single-cutting-edge machine reamers having a turnable cutting plate, the adjusting and re-adjusting operations are awkward and associated with difficulties because, at least as far as adjusting is concerned, adjustments have to be made at two points, and moreover for adjusting to the set desired value it is generally necessary to proceed in a step-by-step manner, gradually working ones way up to the desired value. These problems are due to the fact that adjustment can in principle only be made in the forward direction, that is to say in the direction of increasing diameter, whereas reverse adjustment in the proper meaning of the term is not possible but can only be achieved indirectly by carrying out a new adjustment with a lower starting value and adjusting in a forward direction.

Abstract: A boring tool for producing undercuts in preformed holes. The boring tool has a cutting element which is provided at one end of a driving shaft. In order to produce the undercut, the driving shaft can be deflected at right angles to the axis thereof via a deflection mechanism. The deflection mechanism is accommodated in the boring tool, and is provided with a longitudinally displaceable deflection rod for positively deflecting the driving shaft. In the deflected position, the driving shaft is driven by a rotary drive which is separate from the turning drive. As a result, the undercuts can be very precisely produced.

Abstract: For drilling a hole and machining at least its opening end without changing tools, a through-hole is drilled using a special tool, and then the same tool is moved sideways by means of a special chuck which guides the tool during machining of the drilled hole. The chuck has a locking device which when engaged holds it in a drilling position and which when disengaged allows sideways motion of a tool mounted in the chuck. The longitudinal section of the tool used, to be located within the hole during the machining operation, is situated within a curved surface having a radius just as great as that of the drill and having its center of curvature on the line about which the tool rotates during drilling.

Abstract: A cam-controlled boring bar system (100) includes a first housing (152) which is rotatable about its longitudinal axis (154), and a second housing in the form of a cam-controlled slide (158) which is also rotatable about the axis (154) as well as being translatable therealong. A tool-holder (180) is mounted within the slide (158) for holding a single point cutting tool. Slide (158) has a rectangular configuration and is disposed within a rectangularly configured portion of the first housing (152). Arcuate cam slots (192) are defined within a side plate (172) of the housing (152), while cam followers (194) are mounted upon the cam slide (158) for cooperative engagement with the cam slots (192). In this manner, as the housing (152) and slide (158) rotate, and as the slide (158) also translates, a through-bore (14) having an hourglass configuration will be formed within a workpiece (16) which may be, for example, a nuclear reactor steam generator tube support plate.

Abstract: Tool includes a plurality of circumferentially spaced radially extending guideways in an end face thereof for receipt of a corresponding number of cutting tool holders. The radial inner ends of the holders have cam followers thereon which are urged radially inwardly by spring members into engagement with one or more correspondingly tapered cam surfaces on a central pusher element. The pusher element is supported for axial movement within a longitudinal bore in the cutting tool and is precisely axially movable in opposite directions to cause precise radial inward and outward movement of the tool holders within such guideways.

Abstract: Pipe thread cutting apparatus having combined simplified control means for positively controlling the position of the thread cutting chasers throughout the thread cutting operation.The control is effective to move the chasers to a desired closed position, to adjust the closed position for sizing, to recede the chasers to produce a tapered thread and thereafter move the chasers to open position upon completion of the threading operation.

Abstract: Structure for and method of mounting and actuating a spring loaded drawbar actuated boring and grooving tool on a spindle which spindle includes a machine tool hydraulically actuated drawbar therein, wherein there is no positive connection between the spring loaded boring and grooving tool drawbar and the machine tool drawbar, facilitating angular alignment of the boring and grooving tool and spindle with the boring and grooving tool in surface to surface contact with the spindle. The spring loaded drawbar is resiliently urged toward the machine tool hydraulically actuated drawbar to actuate grooving bits on the boring and grooving tool.Leakage of air under pressure between the drawbars is sensed as an indication of a worn or broken grooving tool.Guiding and assuring concentricity of the grooving bits is accomplished from the outer end of the boring and grooving tool by rectangular boring bits secured in angularly spaced apart relation around the outer periphery of an end cap.

Abstract: A tool holder having a shank receivable in a machine tool spindle, a tool mounting shell securedly connected to the shank and adjustably movably carrying a cutting tool in a radial direction thereof, and a pair of contact detection members respectively protruded from the outer surface of the mounting shell in opposite directions. The tool holder, when used while received in the machine tool spindle, operates not only to make a bore in a workpiece, but also to be a measuring probe in measuring the diameter of the bore so that a machine tool using the tool holder is able to successively perform boring and measuring operations of the bore. Further, the tool holder incorporates a tool position adjusting mechanism therein.

Abstract: A boring tool for radial widening or enlargement of a cylindrical bottom, foundation, or anchor bore. The boring tool comprises a tubular tool body having a tool shank provided for clamping in a driving machine or prime mover, and an enlarging spindle guided in the tool body and adapted to be supported on the bottom of the bore. When entering into the tool body, the enlarging spindle radially adjusts the cutting parts or elements provided for carrying out the enlargement. The tool body is formed of radially resilient segments which extend in the axial direction and delimit longitudinal slots which are open toward the front end of the tool. Cutting parts or elements are arranged on the free ends of the segments, with each part having an axial working which extends in the circumferential direction of the tool body, with those working surfaces which are adjacent one another in the circumferential direction forming the front end face of the tool body.

Abstract: A tool positioning device for radially adjusting, by remote control, the position of a cutting tool very precisely relative to the axis of rotation of a rotating face plate includes an air pressure operated bi-directional pawl and ratchet mechanism employed to operate a differential screw to shift a tool carrying member radially of the face plate.

Abstract: A skiving tool having a retractable knife for use in combination with a roller burnishing tool for finishing the internal surface of a cylindrical hole. The retractable knife includes a pair of radially extendible knife holders defining a camming path having an axial portion and an angled portion. A push dart has a camming element with complementary camming surfaces which rides along the camming path. Axial actuation of the push dart causes the knife holders to extend radially into a stable, locked position. The roller burnishing tool includes a roller race having a central axis and a frustoconical outer surface tapering radially outward and axially forward. A plurality of frustoconically tapered rollers are arranged about the outer surface for rolling engagement with the outer surface with the smaller ends of the rollers facing forward. The taper of the rollers is such that the outermost surface portion of each roller is parallel to the central axis.

Abstract: A contouring and threading attachment for use with numerically controlled multi-function machine tools having automatic tool changing capability. The attachment has a spindle-actuated body adapted to detachably engage an adapter collar rigidly fixed to the outer end of the spindle sleeve. The body may be installed and removed by the automatic exchange arm mechanism of the machine tool and be stored in the tool magazine when not in use. A cutting tool on the outboard end of the attachment is movably radially of the spindle axis. The radial movements of the cutting tool are executed automatically through corresponding axial movements of the spindle under the numerical control of the machine tool.

Abstract: The present invention relates to a boring device for boring internal surfaces of hollow workpieces of the kind which comprises radially adjustable insert-provided holders, there being provided pressure means, such as steering pins so as to effect radial adjustment of the insert holder from an outer active working position to an inactive position. The radial adjustment occurs by having each insert holder via said steering pins supported against a bushing of non-circular cross section actuatable by a shaft member centered within the bushing, said bushing upon its rotation effecting said radial adjustment.

Abstract: A boring tool comprising a tool head provided with a slot extending transverse to the axis of the tool head in which a pair of opposite cutting knives are guided movable in longitudinal direction of the slot. A spacer is guided in the tool head movable between a first and a second position. In the first position the spacer is located between inner ends of the cutting knives which are spring biased to engage the spacer to be movable with the latter in the longitudinal direction of the slot while holding the cutting knives in a cutting position. In the second position the spacer frees the cutting knives to move under the influence of the biasing springs toward each other to an inactive position.

Abstract: A collapsible boring bar is disclosed having radially movable tool units on its outer periphery. The tool units are moved radially by an axially slidable ramp means that acts on cylindrically shaped rollers. The ramp means are located in grooves formed in a tapered spacer element that is located within the head of the boring bar.

Abstract: A machine tool having a boring bar carrying cutting tools and mounted for rotative adjustment on a rotary driven spindle with its axis offset from the axis of the spindle. An additional cutting tool is mounted for radial adjustment on the spindle individually of the boring bar. The tools on the boring bar and the cutting tool on the spindle are adjusted radially by means of a helically splined nut engaged with a similarly splined shaft which is rotated relative to the spindle in response to axial displacement of the shaft.

Abstract: The combination with a collapsing, rotary, thread-cutting die head of a chamfering tool inserted coaxially in the hub of the die head. The tool has a cutting blade which acts upon the end of the part being worked upon, during the threading operation. A series of channels drilled through the body of the tool are connected to a source of compressed air in order to blow away the waste material.

Abstract: A holder for use with a screw cutting diehead of a machine tool, the holder having a recess for the reception of a thread chaser element, which recess has a surface arranged to locate the chaser element therein at a predetermined helix angle, and the holder being adapted to permit the element to be gripped in position therein. The invention also includes the combination of a chaser carrier and separate chaser holder mounted therein.

Abstract: A high speed spindle has a motor and tool adjustment mechanism which aligns spaced bearing means to rigidly support the spindle shaft at high speed operation and to prevent excessive lateral loading of a bearing unit of the tool adjustment mechanism. The unitary motor and tool adjustment mechanism are joined together as a single unitary assembly which is mountable on a machine tool base without requiring alignment and preassembly of the motor and tool adjustment mechanism at field locations.