Abstract: Cutting tool, such as a gun reamer or a drill, with a rotating cutting blade and a rotating support member for supporting the workpiece, where at least one of the cutting blade and the support member are selectively biased. The selective bias on the blade and/or the support member is preferably effected by selectively pressurized fluid which bears on the blade member and/or the support member.

Abstract: A mechanism and method for adjusting the position of a cutting insert relative to the body of a cutting tool is disclosed. The mechanism of the invention comprises a pair of flexible cantilevered walls each defining a wall of cutting insert pocket in the body of a boring bar. A boring bar of the invention comprises a bar body having at least one pocket for receiving a cutting insert and a position-adjusting mechanism including a pair of flexible cantilevered walls each defining a wall of the pocket. In the method of the invention, a boring bar is provided having a plurality of pockets each defined by a pair of cantilevered walls adapted to be flexed by a wedge mechanism. Next, a cutting insert is installed into each pocket. The position of the cutting edge of each cutting insert is then determined. In the last step of the method, the radially inwardmost insert is adjusted outward by using the wedge mechanism to flex the cantilevered walls.

Abstract: A cutting tool insert is mounted on a flexure member that is mounted on the end of a boring bar. The construction of the flexure member is such that it is compliant along a radial axis perpendicular to the direction of tool advancement, but relatively stiff along a feed axis in the direction of tool feed, and along a cutting axis in the direction of tool rotation. Any displacement of the flexure member and cutting tool insert as a result of workpiece engagement or boring bar deflection is sensed by laser detectors. Signals from the laser detectors are coupled to a computer that rotates with the boring bar and are used to provide feedback signals to an actuator in contact with the flexure member. The actuator displaces the flexure member to correct the position of the tool insert.

Abstract: A precise finish machining of bearing bores (25) at crankcases (26) is made feasible by way of a device with tow skid-guided spindle boxes (1, 2), the drivable spindles of which are in flush alignment. One spindle is designed as a working spindle (3) carrying a radially adjustable tool (11), while the other spindle is designed as a guide spindle (4) engaging with a guide pin (6) into a front-end bore (5) of the working spindle (3). The guide pin (6) is succeeded by a cone (7) on which the adjustable tool (11) is supported, and where a measuring key (14) is located between the cone (7) and the base (12) of the bore (5), the measuring signal from said measuring key serving for control of the distance between both spindle boxes (1, 2) and thus for control of the radial excursion of the tool (11).

Abstract: A drill bit including a body, a drill bit fixed onto the body, a thrust transmitting member arranged on the body and having a contact portion, and an undercut cutting member housed in a guide groove provided in the side face of the drill bit. The undercut cutting member is freely movable and provided with an undercut edge at the lower end thereof. A pull-up spring is installed to operably move the undercut cutting member, and a working force transmitting mechanism is installed on the body coupled with the thrust transmitting member and with the undercut cutting member, to press down the undercut cutting member against the resistance of the pull-up spring by the approaching movement of the body and the thrust transmitting member thereby to cause the undercut cutting edge to protrude outwardly of the drill bit body surface.

Abstract: A clamp for indexable inserts used especially for turning. The clamp consists essentially of a clamp shaft and a clamp head combined with it in one piece. The clamp shaft can be secured to an axis-parallel clamping surface of a tool holder by a supporting surface obliquely transfixed by a clamping screw. The clamp head has an open-edged recess to take the indexable insert, one effective cutting corner of which projects on one side beyond the outer surface away from the support surface. In order to be able to adjust the distance between the clamping surface and the cutting corner, the clamp head has, in the free region between the recess, the supporting surface and the clamp shaft, a slot-like aperture having a curved cross-sectional shape open towards the clamp shaft. The clamp head can be elastically bent with respect to the clamp shaft under the effect of an adjuster.

Abstract: A machining tool for the fine machining of internal surfaces, with a blade carrier and cutting inserts preferably attached releasably thereto. An adjusting device for the precision adjustment of the cutting edge is provided. The blade carrier has at least one slit located closer to the longitudinal axis of the machining tool than is the cutting insert, thus creating a blade carrier segment which can be essentially radially adjusted and which carries the cutting insert and which is connected in one piece with the remaining blade carrier. The degree of freedom of the blade carrier segment permitted by the slit can be stabilized via adjusting device.

Abstract: A boring bit includes a shank adapted to be mounted on a rotary tool. A blade is mounted on the shank and is resiliently deformable to reduce its boring diameter.

Abstract: A boring tool is equipped with a radially adjustable clutter element, and a remotely-operated mechanism for adjusting the cutter element between its active and inactive positions. During movement of the tool into a hole in a work piece the adjustable cutter element is inactive; the cutting operation is performed by one or more non-adjustable cutter elements. When the tool holder reaches the limit of its penetration into the work piece the remote adjusting mechanism is operated to move the adjustable cutter element radially outwardly to an active cutting position. During return movement of the holder out of the work piece the adjustable cutter element performs a finish machining operation on the hole surface.

Abstract: A cutting chisel holder which is controlled by pressure and constructed as a rotary drill head which can be precisely adjusted by hydraulic means has a cutting chisel, which can be clamped in, with a base and a driven member which is movable relative to the base, and has a pressure chamber arranged between the base and driven member, as well as a pressure medium feed. The driven member moves parallel to itself under the influence of the pressure medium and, in doing so, causes a movement of the cutting chisel on a curved path extending approximately vertically to the axis of rotation of the drill head by parts acting mechanically without friction.

Abstract: Rotating drill head with a boring bar which is swivel able by small amounts transversely to the rotational axis by fluidic means, with a base, a driven member located opposite the base, a pressure chamber arranged between the base and driven member and having a fluid inlet, and with an expanding lever gearing in a working connection with the driven member and serving for the synchronous and oppositely directed swiveling of a tool carrier and a compensating member which are constructed so as to be geometrically similar and constitute the boring bar.

Abstract: A tool holder for a machine tool is provided with a tool shank clamping mechanism in the form of an expanding or contracting sleeve, hydraulically actuated, and the chuck has an annular groove aft of an annular collar on the clamping mechanism. Circumferentially spaced conical screws, mounted axially in the collar, bear against the body of the tool chuck and allow fractional tilting of the clamping mechanism relative to the true holder and spindle axis to provide exact centering of the cutting end of the mounted tool.

Abstract: An adjustably expandable fluted tap to reform damaged threads defined in a blind hole, such as a spark plug hole. The tool provides an elongate body with a first end defining an expandable fluted tap having a relaxed diameter smaller than but matingly similar to the threads to be repaired, and a second end defining a butterfly handle. The body defines a medial channel carrying an arbor with a first end having a tapered forcing cone for expanding the fluted tap, and a second end threadedly engaged in a round knurled nut carried externally of the second end of the body. The tap is inserted in a hole beyond the damaged threads, the knurled nut tightened to retract the forcing cone to expand the fluted tap into mating engagement with the undamaged threads and the tool is then screwed out of the hole by revolving the butterfly handle to reform the damaged threads as it is withdrawn therepast.

Abstract: A tool holding fixture having a rotationally symmetrical holding body and a shaft that form one piece. The one piece has an axially directed first annular groove which is concentric with the shaft and is positioned in a transition area between the holding body and the shaft. The shaft has an annular collar with a flank which is inclined in a direction toward the first groove. The rotatable clamping ring encompasses the collar and engages the first annular groove. The rotatable clamping ring is seated on the shaft. The clamping ring has a second annular groove in which wedge-shaped sliding blocks are seated and are radially and axially moveable, but secured against canting within the second groove. The sliding blocks are supported on the inclined flank of the collar. A pressure screw is threadedly engaged within the clamping ring.

Abstract: A boring bar has a body formed with an axial cut at the portion near its tip to define a pair of cut-apart portions. Insert mounting portions are provided on mutually opposite ends of the cut-apart portions at a tip end of the cut. A dimension adjusting mechanism is provided at an intermediate portion of the cut-apart portions. A dimension adjusting mechanism is provided at an intermediate portion of the cut-apart portions to change a boring diameter between the tips of cutting edges of inserts mounted on the insert mounting portions by moving the cut-apart portions along surfaces of the cut. A fixing screw is provided between a tip of the cut-apart portions and the dimension adjusting mechanism to fix the cut-apart portions together after adjusting the dimensions.In another arrangement, another cut is formed in the bar body at its end opposite from the end on which the inserts are mounted. A covering member is mounted on the bar body to cover this cut.

Abstract: A fine adjustment device for turning tool bits in the form of a pneumatic/hydraulic converter for converting of control signals into proportional actuating or adjusting forces with a combination of an oil pump and pneumatically controlled overflow valve, whose outlet pressure is adjustable with the help of control air.

Abstract: An adjustable tool holder for cutting tools in boring machines having an internal drawbar includes a housing pivotally connected to a rotary spindle and a forwardly disposed cutting tool. A wedged camming surface is positioned forwardly on the drawbar for contact against an internal drive lever axially disposed for pivotal contact against the housing. Upon actuation of the drawbar the housing is stressed to a canted position causing pivotal adjustment of the cutting tool.

Abstract: A cutting tool includes a motor and control inside the cutting tool for adjusting the cutting radius of the cutting tool. The cutting tool is adaptable for use with machine tools which do not include integral systems for moving parts of the cutting tool adjust the cutting radius.

Abstract: To center a tool restrained within a collet coupled to a driven portion (9) which, in turn, is coupled to a driving portion (2), and to compensate for possible axial offsets of the respective portions, a coupling element connects the driving and driven portions and two first spring elements (23, 24) are located on the driving portion, two further spring elements (31, 32) are located on the driving portions offset with respect to the first spring elements of 90 degrees. Each one of the spring elements can be adjusted with respect to a centrally located counter support portion (29, 31) by adjustment screws passing through the spring elements and bearing against the counter support, to thereby position the axis of the driven portion (9) carrying the collet, in congruence with the axis of the driving portion (2) even if there are manufacturing tolerances or other offset conditions, such as tolerances in the tool clamped in the collet.

Abstract: An adjustable cartridge to be mounted in a boring bar, the cartridge including a anvil rotatably affixed to said boring bar, the anvil including a pocket into which a lay-down indexable insert is affixed. The anvil is secured in an axially oriented slot which includes an arcuate seating face. Rotation of the anvil within the slot effects radial adjustment of the insert.

Abstract: A tool for metal-cutting comprises a holder (3) on which is mounted in its front part (3a) a cutting plate (6) and which is formed together with a base body (2) as an integral unit by being connected rigidly to the base body (2) in the region of its rear end (3b), a perforation (9) in the holder forming a parallel-type spring arrangement so that the holder is resiliently deflectable relative to a support (11) formed by the base body (2), and an adjustment device for deflecting the holder in use as desired.

Abstract: A tool holder for a numerically controlled machine tool, in which a cutting edge provided on a base member is adjustable with respect to a reference surface on the base member by adjustment means. The adjustment means comprise a U-shaped slot in the base member. This slot serves to form a pair of lever portions in the material of the base member, which lever portions are connected to each other by an area of the base member serving as a pivot. An adjustment screw threadingly engaging the base member acts upon the free end of one of said lever portions such that upon an adjusting movement of the adjustment screw the first lever portion is deflected in a predetermined direction to thereby deflect the second lever portion of the opposite direction. The second lever portion transmits its movement to the cutting edge by means of a spacing member disposed in the slot (FIG. 1).

Abstract: Boring device which permits the taking of dimensions with precise tolerance, characterized in that it is designed with and comprises means which permit the taking of dimensions by deformation of the neutral longitudinal axis of the tool carrier axis, which means assure a controllable and modulatable force of a part of the tool carrier axis contained between two supports.

Abstract: Manually adjustable pivot head for a rotary boring bar having a spring steel mounting plate with two opposed arcuate slots terminating in yieldable webs extending between a rigidly mounted outer ring and deflectable central portion on which an annular flange of the boring bar is secured. A manually adjusted screw effects adjustment deflection of the central portion.

Abstract: An adjustable boring bar wherein the adjustment of the cutting end is provided by a prestressed internal bar bearing against the cutting end to selectively distort the boring bar in the direction of the cutting bit to compensate for wear. The adjustment is by means of rotation of the prestressed internal bar to direct the pressure of the internal bar against the boring bar and cutting bit in the desired direction.

Abstract: A method and device for changing a position of a cutting edge of a lathe tool, whereby the position is changed or altered in dependence upon a rotational frequency and a speed of rotation, respectively, that is, in dependence upon a centrifugal force.

Abstract: An expansion tap having a body (20) with a head (22) on one end and angularly tapered threads (26) on the other, with a bore (24) running therethrough. The body (20) has a shoulder stop (38) in the middle and a plurality of flutes (28) through the threaded portion. A capscrew (46) penetrates the bore (24) and is threadably engaged to a forcing cone (40) contiguous with the bore on the threaded end. A plurality of aligning ribs (44) engage the flutes (28), preventing rotation when the capscrew is tightened. The tap is inserted into a damaged threaded hole engaging the original threads in the middle and subsequently expanded by tightening the capscrew (46), thus straightening the tapered thread portion until the lands are parallel. Removal of the tap straightens and recuts the damaged threads.

Abstract: A holder for a rotary cutting tools has a holder body fixed to a spindle of a machine tool. A rotatable shaft concentric with the holder body and having a tool-mounting portion at one end thereof is coupled at its other end portion to the holder body to receive torque from the holder body. The rotatable shaft is so mounted as to be radially displaceable and inclinable relative to the holder body. A positioning member is fixedly disposed on the machine tool body radially outwardly of the spindle. A cylindrical casing disposed radially outwardly of and rotatably engaged with the rotatable shaft such that the casing and the shaft are rotatable relative to each other, the casing being engageable with the positioning member for accurate positioning thereof by the positioning member, and thereby positioning the rotatable shaft.

Abstract: A device for boring holes has a geometrical longitudinal axis, a clamping zone, a shank having a front end zone, two turnover plates fastened on the front end zone of the shank in opposite positions, and a chip space in front of each turnover plate. In the shank, a longitudinal slot runs radially to the geometrical longitudinal axis, which is open towards the front end zone and has a bottom that extends so far towards the clamping zone that the shank halves thus formed can be bent forward at the front end zone to a degree that is sufficient for fine setting the bore diameter. Beyond the bottom of the longitudinal slot, a tapped hole in the shank is coaxial with the longitudinal axis. A coaxial rest hole in the shank in the inner zone of the longitudinal slot is intersected by the longiudinal slot.

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: A diamond point type dressing tool with means for adjustment to dead center within a tolerance of .+-.0.0001" is mounted to a control head assembly capable of producing horizontal, rotary and vertical movements of the tool either independently or simultaneously to reproduce from a remotely disposed associated template any desired contour of angles and radii on the peripheral edge of a grinding wheel. A tracing rod, snugly but slidably journalled through a support ball, has a tracing end adapted for manual movement over the profile of the template and a control end operatively associated with the control head for reproducing the template profile in the movement of the dressing tool and for rotating the diamond point where necessary on the profile. The ball support is seated in the control head and is fixed against lateral or vertical movement but has the capablility of turning in place as the orientation of the axis of the rod is changed during movement over the profile.

Abstract: A boring tool is disclosed capable of positioning a tool element between a radial cutting position and a radial retracted position out of contact with the finished workpiece bore to avoid tool mark formation on the finished bore during tool withdrawal. The boring tool is simple and low cost in construction and includes a resilient tool-carrying member which extends transversely of the spindle axis in cantilever fashion for deflection by a spindle draw bar relative to a stop means on a fixed support member attachable to the spindle. During boring, the tool-carrying member is in deflecting engagement with the drawbar and, in conjunction with stop means, positions the tool thereon in a radial cutting position. For tool withdrawal, deflecting engagement is released so that the resiliency of the tool-carrying member positions the tool in a radial retracted position out of contact with the finished workpiece bore.

Abstract: A cutting tool has a body with an external screw threaded portion on which is mounted an internally screw threaded adjustment ring, a disc spring, a tapered collet having a frusto conical surface and a clamping member. The frusto conical surface is adapted to be engaged against a frusto conical recess in a tool holder having a bore therein in which said body is insertable. The body is adjustable axially of the tool holder by rotation of the ring and then clamped in position by the clamping member such as a bolt. A key engaged in a keyway prevents rotation of the body relative to the tool holder. The cutting tool is thus lockable relative to the tool holder firmly and accurately.

Abstract: A tool cartridge to be fastened to a boring bar for line boring operations comprising a pair of split legs on the tool cartridge. Each leg has an insert with a threaded bore having a different pitch. A differential screw comprising two threads on the shaft corresponding to the two different threaded bores on each insert effects a micro-adjustment of the radially moveable leg on the cartridge holding the cutting tool when the differential screw is rotated.

Abstract: A boring unit comprises a rotary spindle and a tool support mounted therein. The tool supports includes a rearwardly extending headbolt and a rearwardly extending supporting arm. The supporting arm engages an inclined wedge surface, the latter being movable by a connecting rod so that the wedge surface imparts rotary movement to the supporting arm and to the tool support about an axis of adjustment which is oriented perpendicular to the axis of rotation of the spindle, thereby moving the tool in a radial direction. The headbolt of the tool support is retained within a chucking cage. The chucking cage is movable to a position for releasing the headbolt by means of the movable connecting rod.

Abstract: A micrometrically adjusted tool arm assembly for mounting on a spindle or a non-rotating support has a tool arm with a mount thereon for generally centrally supporting a tool bar. Only the end sections of the arm are secured to a base support and a slot system extends axially through the arm so that the central section can move radially relative to the ends of the arm. A micrometrically adjustable positioner mechanism engages the central section in a position relative to the slot system to provide a rigid backup for the tool bar. When the assembly is mounted on a spindle a releasable lock is provided which functions to deform the slot system and move the central section radially to engage positioner mechanism at a preselected position.

Abstract: A deburring tool including an elongated arbor formed with a cutting blade recess. A unitary cutting tool has a cutting head with an elongated, flat, resilient blade extending therefrom. The blade is received in the recess, and the end of the blade opposite the cutting head is secured to the arbor by a pin and an adjustable screw with the cutting head projecting from the recess. Rotation of the screw causes pivotal adjustment of the blade to in turn adjust the unstressed position of the cutting head with respect to the recess. The portion of the blade that extends from the pin to the cutting head is yieldable to permit the cutting head to move resiliently inwardly with respect to the recess.