Abstract: A method and apparatus for controlling the penetration depth of a cutting tool of a numerically controlled machine. A substantially cylindrical collar extends around at least part of the cutting tool with the collar being axially movable with respect to the axis of rotation of the cutting tool. An electronic sensor, secured to a non-rotatable housing of the numerically controlled machine transmits a signal to terminate further penetration of the cutting tool. The sensor is situated adjacent the collar and axially rearward thereof. A locking pin is provided for preventing an axially rearward end of the collar from touching an axially forward end of the electronic sensor when the collar is not being subjected to a force acting in a rearward axial direction. A nose bush for pre-positioning of the collar relative to the cutting tool in the axial direction is advantageously provided.

Abstract: A line boring apparatus comprising a motorized spindle and tool support mounted on a support frame for motion along two axes perpendicular to a rotational spindle axis. The spindle is also supported for motion along the spindle axis relative to the tool support. A tool cradle is supported beneath the spindle on the support frame and stores boring bars of differing outside diameters equipped with support bushings having outside diameters equal to an inner diameter of the tool support. A CNC is programmed to actuate an axes drive to cause the spindle to select a boring bar and bushing from the cradle. The CNC and axes drive then move the bar and bushing to a predetermined boring position axially aligned with an interrupted line bore to be machined in a workpiece.

Abstract: An underwater machining apparatus that is capable of drilling completely through a surface and collecting all machining debris is described. The underwater machining apparatus, in one embodiment, includes a drill body, a drill motor coupled to the drill body, a drill bit coupled to the drill motor, and a drill bit sleeve positioned coaxially around the drill bit. The underwater machining apparatus also includes a vacuum assembly coupled to and in fluid communication to the drill bit sleeve. The drill bit sleeve is configured so as to permit water to be drawn through the sleeve by the vacuum assembly, thereby removing the machining debris. The vacuum assembly includes a collection container configured to collect solid particles of machining debris while permitting water to flow through the container.

Abstract: The following invention relates to a drill bit that will drill a round and precisely sized hole when using a hand-held drill motor. The bit has a unique multi-angle lip relief that cuts faster than a standard drill bit and stays sharp longer as well.

Abstract: A cutting tool assembly which is adapted for use in combination with a drill for cutting a hole in a work piece. The assembly includes a u-shaped blade and a mandrel assembly for fixing the blade to the drill, a dust shield which surrounds the blade and a stabilizer which can be fixed adjacent the blade. In one construction, the blade includes tips which are removably connectable to a wing portion. Also, a coating of wear-resistant material may be applied to the tips so that the blade is self-sharpening during cutting operations.

Abstract: The present invention includes the apparatus and method to create an improved loose tenon joint with multiple arculate mortise surfaces and similarly configured loose tenon member for woodworking applications. A drilling jig is provided to axially guide a drill bit for boring a series of adjoining holes forming a mortise, and a router bit is provided to form a cooperating tenon. A first jig embodiment manipulates a slidable drilling guide bar maintaining longitudinally spaced thru-bores and a plurality of index holes. A second embodiment includes a stationary jig body having an opening that supports at least two drilling guides each having at least one thru-bore. A third embodiment provides a drilling guide bar slidably attached to a stationary support member by at least one indexing pin inserted through an elongated indexing aperture in the stationary support member and into an indexing hole in the guide bar. Preferably, the indexing pin and indexing hole are threaded.

Abstract: A method for supplying the working parts of a boring tool, in particular a drill, with a lubricant which both cools and lubricates the drill. A dispenser is connected directly or indirectly to the drill to enable lubricant to be fed to the working parts of the drill through at least one channel in the drill. A boring tool, in particular a drill, is also disclosed with a shaft, a cutter, at least one internal lubricant channel and at least one reservoir being fitted as a dispenser for the lubricant. The reservoir is directly or indirectly connected to the drill by mechanical connections and to the at least one lubricant channel to permit the passage of lubricant. In addition, a tool holder designed to hold the drill is disclosed. The tool holder has an internal dispenser for the lubricant. The dispenser is connected, when the drill is fixed in place, to the at least one lubricant channel in the drill to permit the passage of lubricant.

Abstract: A kit for repairing a worn out of round aperture. The kit includes a template which is later utilized as a part of the repair. In a first embodiment, the template is precisely located by means of utilizing the bottom of the aperture which does not become out of round as does the upper portion thereof and is fixedly attached to the structure containing the out of round aperture. A sacrificial pin is inserted in the out of round aperture, centered therein by means of the bottom non-out of round portion and adhered thereto. A drill is then passed through the boring guide enlarging the out of round aperture to a true round bore and the sacrificial pin is drilled out at the same time. The boring guide is then removed and an enlarged precision pin is inserted into the re-bored aperture. The new pin is fixedly secured in the new aperture by any convenient means such as peening between the pin outer surface and the adjacent structure.

Abstract: An automatic fluid valve (25) includes a drive member (32) having an aperture (43) and a driven member (54). The automatic fluid valve (25) also includes at least one torque transfer member (38) for transferring torque from the drive member (37) to the driven member (54) and at least one elastic member (36) disposed between the drive member (32) and the driven member (54). The at least one elastic member (36) is responsive to a force transferred by the driven member (54). The automatic fluid valve (25) also includes a fluid blocking member (30) disposed within the aperture (43) for selectively allowing or preventing the flow of fluid (100) through the aperture (43). The fluid blocking member (30) is responsive to compression or decompression of the at least one elastic member (36).

Abstract: A miniature tenon cutter having an aluminum body and a flat cutter blade positioned adjacent to a throat having a funnel mouth utilizing a gauge to assist in establishing cutter blade position. The tenon cutter is used with an electric drill motor, and it forms a cylindrical tenon with a sloping shoulder.

Abstract: A drilling tool for machine tools includes a drill shank provided with a radially outwardly projecting feed helix. The drilling tool also includes a drilling head disposed at the end of the drill shank and having two segment sections which are delimited radially outwardly by partially cylindrical peripheral surfaces and separated from each other by axially parallel chip grooves which are adjacent in the peripheral direction. The drilling head also includes at least two cutting plates disposed at different radial spacings from a drilling tool axis and each having a cutting edge projecting beyond the drilling head. The chip grooves are delimited on the side of the cutting plates by at least one axially parallel radial chip-deflection surface and by a chip-guide surface disposed on the adjacent segment section.

Abstract: A drill assembly for facilitating the removal of a rivet from a workpiece. The drill assembly includes a cutter housing which has an end portion that defines a recess for receiving a head of the rivet. The cutter housing also has a channel for receiving a cutter, and the channel communicates with the recess for cutting a notch in the head of the rivet. A longitudinal axis of the channel is offset from a longitudinal axis of the rivet when the head of the rivet is positioned in the recess defined by the end portion of the cutter housing.

Abstract: A method of boring a plurality of aligned, mating bolt holes in a pair of separated coupling flanges comprising the steps of:a) providing a template with pre-formed holes matching a desired location for bolt holes in the pair of coupling flanges;b) securing the template to a first of the pair of coupling flanges;c) attaching a boring tool to the template in alignment with one of the bolt holes;d) re-boring one of the bolt holes in the first coupling flange and repeating steps c) and d) for each remaining bolt hole individually in succession;e) removing the boring tool and template from the first coupling flange;f) relocating the template on the second of the pair of coupling flanges; andg) repeating steps b) through e) for the bolt holes in the second coupling flange.

Abstract: A preform gate cutter for cutting a hole in a preform gate includes a cutter, a housing forming a cutting chamber, and a preform chuck having a longitudinal preform bore for receiving a preform. The preform chuck is insertable into a housing bore. The preform chuck defines a centerline that is coincident with the preform centerline and is aligned with a perimeter of the cutter to enable the cutter to form a hole in the preform at the preform gate. The housing may have a cutting chip discharge slot. A method for cutting a hole at the preform gate is also provided.

Abstract: A method is provided for machining threads on cylindrical parts, particularly oil country tubular goods, by mounting four thread-cutting chasers in a die head of a thread cutting machine. The thread chasers are each of unique profile, which enables the cutting of threads to close tolerance and decreases metal burrs on the first and last threads cut on the part by reducing the total tool cutting forces imposed on the part and said threading machine.

Abstract: The invention relates to a method of cooling and lubricating a metal-cutting rotating tool with a geometrically defined cutting element and/or the workpiece in the cutting zone. A coolant-lubricant and a carrier gas are fed separately into a tool shaft, brought together inside the rotating working spindle as close as possible to the cutting zone and directed via integral feed ducts onto the cutting element and/or cutting zone. Also disclosed is a device for applying this method. The coolant-lubricant and carrier gas are each introduced into a coolant reservoir completely or partially filled with a porous filler where they are mixed; the mixture is then fed directly into the cutting zone.

Abstract: An apparatus for drilling holes in multiple pieces of lumber of uniform width and which is capable of processing more than one width is disclosed. The drill bits are arranged in rows and the spacing between drill bits differs from row to row so as to permit the drilling of holes in more than one size of lumber. The header in which the drill bits are mounted is adapted to travel vertically along two parallel guides. Stabilizers prevent the lumber from buckling or shifting and help to ensure that the holes will be drilled in the same location in each piece of lumber. When a layer of lumber is conveyed to the apparatus, pistons lower the header which brings a spring-loaded horizontal stabilizer into contact with the lumber to stabilize the lumber. A second stabilizer pushes the lumber laterally to press the pieces of lumber together.

Abstract: A method and apparatus for optimizing the drilling position of a multi-layer printed circuit board prior to drilling. Each board is x-rayed to determine location coordinates information of the inner layers of multi layer circuit board panels. An optimization process determines optimal locations for drilling. The board is then drilled according to the optimized coordinates. By minimizing misregistration between the drilled holes and inner layers of the multi layer semiconductor circuit board, the present invention reduces a significant cause of scrap to the circuit board industry as well as removing a major impediment to further increasing circuit density and wireability.

Abstract: An article assembly an alignment machine includes a table comprising a base frame and a work surface mounted thereon. A jig system includes X-axis and Y-axis jig subsystems each including clamps slidable on the work surface. The jig subsystems are actuated by pneumatic piston-and-cylinder units. An article forming system includes a gang drill mounted on the base frame below the work surface and adapted for raising and lowering between engage and disengage positions.

Abstract: There is provided an Al.sub.2 O.sub.3 -TiN coated cemented carbide insert intended for turning of steels and especially Ca-treated steels. The alumina layer is protected by an extra thick and multilayered coating of TiN. The TiN coating is wet blasted and, for this purpose, (Ti,Al)(C,O,N) bonded to the underlying Al.sub.2 O.sub.3 layer which preferably consists of .alpha.-Al.sub.2 O.sub.3. The extra tough behavior together with increased wear resistance can be obtained by optimizing the TiN layer thickness, structure and adhesion and wet blasting the said TiN coating. This invention is characterized by the fact that the coating layers are not missing at the cutting edge of the insert.

Abstract: An end effector (30) adap ttachment to and accurate positioning by a robot is provided for positioning a channel-shaped workpiece (10) at a desired position and drilling an accurately located positioning hole in the work piece, even if the workpiece is curved or has a compound contour. The end effector (30) includes a conventional speeder assembly (68) with a taper that can be grasped by the robot and rotated for transfer of torque to the speeder assembly. A flange base (54) is attached to the speeder assembly (68) and has a central opening to accommodate a drill bit (67). A housing assembly (50) is slidably mounted around the flange base (54) through a linear bearing (109). An index shaft (32) is slidably mounted partially within the housing assembly (50) through a second linear bearing (110). A collet (36) is concentrically mounted slidably about the index shaft (32). The collet (36) is adapted to expand radially when it is forced over a wider portion (34) of the index shaft (32).

Abstract: An engine block is located and clamped on a pallet and then brought into a boring station where the pallet is located and clamped on a shuttle. The shuttle moves solely along a straight horizontal path to move the engine block into the work station, locate the engine block during a machining operation, and then transfer the block out of the work station. First and second three-axis boring machines at respective opposite sides of the block locate crankshaft and camshaft boring bars for different engine blocks and then simultaneously back bore both the crankshaft and camshaft bores. A computer numerical control (CNC) positions the boring bars and the block and controls other machining parameters for different engine blocks. The CNC causes the shuttle to move to a location horizontally offset from a final machining location so that the boring bar axes are offset horizontally from the bearing bore axes and the boring bars are then inserted into the block.

Abstract: A machine for use underwater and therefor subject to ambient hydrostatic pressure for tapping a pressurized pipeline has an elongated tubular tapping machine body with a boring bar therein that receives a cutter at its lower end. A passageway in a lower end portion of the tapping machine body senses the internal pressure of a pipeline after the pipeline is penetrated by the cutter, the passageway being connected to a pressure equalizer having communication with the interior of the tapping machine body to thereby balance hydraulic forces applied to the boring bar during a tapping operation.

Abstract: A method of producing a hole in a fiber reinforced composite material workpiece includes the step of providing a cutting tool having a shaft, a cutting head, and an axis of rotation. The cutting head has a diameter which is substantially smaller than the diameter of the hole that is produced. The shaft has a diameter which is substantially smaller than the diameter of the cutting head. The cutting head has a height which is substantially smaller than the depth of the hole that is produced. The cutting tool is oriented such that the axis of rotation of the cutting tool is substantially orthogonal to the surface of the workpiece. The workpiece is simultaneously machined in both an axial and a radial direction relative to the longitudinal axis of the hole, by simultaneously rotating the cutting tool around the axis of rotation, moving the cutting tool in an axial direction, and moving the cutting tool eccentrically around the longitudinal axis of the hole.

Abstract: A rotating tenon cutter having a wooden or aluminum body and a curved cutter blade positioned adjacent to a throat having a bell mouth with a matching curve. A cylindrical tenon is formed with an attractive shoulder that curves from the tenon to the largest cross-sectional dimension of the work piece on the same radius as the cutter blade. A bubble level vial in the body indicates when the axis of rotation (and axis of the tenon to be formed) is horizontal. The cutter blade is repositionable on the body so that the bevel is appropriately presented for sharpening using a drum sander while the face or a flat side of the tenon cutter body rests on a drill press table.

Abstract: An entry board for drilling small holes having a front surface layer made of aluminum or aluminum alloy to be disposed at the drilling inlet side and a back surface layer made of aluminum or aluminum alloy to be disposed at the drilling outlet side. The back surface layer is adhered or joined by clad rolling to said front surface layer. The hardness of the front surface layer is smaller than that of the back surface layer.

Abstract: A tool includes a tool body and a cutting portion detachably mounted thereon, the tool being rotatable about a longitudinal center axis. The tool body includes flutes formed in an outer surface thereof, and a pair of forward projections at a front end thereof. The cutting portion includes front flutes formed in an external side thereof, and a pair of recesses extending circumferentially in communication with respective ones of the front flutes. To connect the cutting portion to the tool body, the cutting portion and tool body are converged longitudinally so that the projections enter the front flutes. Then, relative rotation is produced between the cutting portion and tool body to align the front flutes with the rear flutes while causing the projections to enter the recesses and form therewith a bayonet coupling.

Abstract: Method and apparatus for non-destructively picking locks which normally are operated by keys, such locks capable of having twisting tumbler pins and sidebars. The method requires that: the pins be raised high in the keyway; the plug be axially bored by a thin drill which enters through a low portion of the keyway, the rear end of the drilled bore opening to the bolt cam operator; the drill bit be removed from the bore; and then the bolt cam operator be directly turned to shift open the bolt. This method does not decode the tumblers nor release any sidebar. The preferred apparatus comprises a pin raiser tool, which is self-retaining due to bias on the pins, which is transmitted to the handle of this tool; and a torquing tool, which is passed through the bore and has a blade which seats in the cam operator for turning the operator to shift open the lock bolt. A unique safety shield can be installed on the tailpiece to prevent picking by the method of this invention.

Abstract: A drill rig for drilling access holes in drill resistant materials, such as those used to construct safes or other secure containers. The drill rig includes a drill bit holding and advancing mechanism having enclosed threaded members for allowing incremental, even pressure to be applied during a drilling operation while preventing burrs and chips from becoming lodged within the threads. A sliding connection is provided between stationary frame structure of the rig and the drill bit holding and advancing mechanism. The connection includes a spring loaded, quick-release mechanism for allowing quick detachment of the drill bit holding and advancing mechanism from the frame structure at the end of a drilling operation or as needed to replace the drill bit.

Abstract: In a golf ball having at least a set of large and small diameter dimples, the large and small diameter dimples are of the same cross-sectional shape in their lower portion. A master model is prepared by feeding a cutter into a hemispherical surface of a master block to different depths while rotating the cutter, thereby forming a set of large and small recesses, respectively, wherein the large and small recesses have the same cross-sectional shape. The master model having plural types of dimples can be briefly fabricated and has increased freedom of design. Using the master model, a golf ball featuring uniform and densely distributed dimples can be manufactured.

Abstract: A firearm barrel having a barrel bore in a barrel bore entrance end is arranged to receive a conical milling tool directed to shape the conical entrance into the barrel bore entrance end, with a counter-bore drill followed by a second conical milling tool directing an annular seat at an interface of the counter-bore and the conical bore to receive a load tool cylinder onto the seat for ease of directing a charge into the barrel.

Abstract: A tool includes a tool body and a cutting portion detachably mounted thereon, the tool being rotatable about a longitudinal center axis. The tool body includes flutes formed in an outer surface thereof, and a pair of forward projections at a front end thereof. The cutting portion includes front flutes formed in an external side thereof, and a pair of recesses extending circumferentially in communication with respective ones of the front flutes. To connect the cutting portion to the tool body, the cutting portion and tool body are converged longitudinally so that the projections enter the front flutes. Then, relative rotation is produced between the cutting portion and tool body to align the front flutes with the rear flutes while causing the projections to enter the recesses and form therewith a bayonet coupling.

Abstract: A short-hole drill bit and short-hole drilling method in which a drill bit has a unitary body with a substantially V-shaped flute and a support pad are provided. The unitary body has a shank portion and a working portion. The flute extends axially along the working portion, and defines a cutting edge and a passive edge at the body periphery. The support pad is located along a portion of the body periphery. The support pad is located with respect to the cutting edge based on a normal cutting force and a tangential cutting force at the cutting edge. The resultant cutting force is directed at the support pad to cause the support pad to center the short-hole drill bit during operation.

Abstract: An overlay sheet having a first thin layer of a polymer material, a second thin layer of a hard material such as a phenolic, melamine or metal foil, and a third thin layer of a polymer material, the first and third layers sandwiching the second layer. The sheet is applied to a surface of a printed circuit board such that the third layer is against the board surface, and the first layer is exposed to receive the drill bit. During drilling operations, the drill bit is advanced initially through the softer first layer of the polymer material, immobilizing the tip of the drill bit against lateral movement, then through the harder layer, then through the softer third layer, and finally through the printed circuit board. The harder layer prevents formation of burrs, and the polymer material inhibits drill bit wander.

Abstract: An air-suction chip removing device for use in continuously removing chips produced by a cutting tool such as a drill when a work is processed by a machine tool to another place without inflicting any damage onto the work. This device is characterized in that a surrounding body (8) is provided around the proximal end of a cutting tool (7) mounted on a spindle (1), that a tubular member (14) adapted to surround the cutting tool (7) in such a manner as to be freely withdrawn, that this tubular member (14) is formed into a shape in which an opening (p) formed in the distal end of the cutting tool (7) is narrowed toward the center of the cutting tool (7) and is biassed toward the distal end of the cutting tool (7) by means of a spring (17), and that a suction pipe (9) is connected to the surrounding body (8) for sucking air from the inside of the tubular member (14).

Abstract: A face frame dowel apparatus is disclosed that is accurate, simple to use and easily transported to remote locations. Two positioning blocks are secured parallel to each other and sandwiched about a smaller spacer block in such a manner so as to form a U-shaped channel for receiving work pieces to be dowelled. The spacer block contains one or more sets of dies to guide the drill bit during drilling of pilot holes for dowels. The apparatus is secured to the work piece by pressure asserted by a securing means such as a platen-like device perpendicular to and transversing one of the positioning blocks. Another embodiment of the invention includes a reciprocated guide useful in drilling shelf holes. The guide is attached to the positioning block opposite that containing the securing means, and reciprocated by means of allen screws.

Abstract: There is now provided a method of machining and shaping a through opening in a fiber-reinforced composite material starting from a preformed hole. At least one rotation symmetrical milling body with a substantially smaller diameter than that of the preformed hole is placed in that hole and the opening is machined and shaped by the milling body partly rotating around its own axis, partly by a translational movement relative to the edge of the opening. According to the method, the fiber-reinforced material is oriented in such a way that the axis of rotation of the milling body is essentially perpendicular to the longitudinal direction of the fibers at the edge of the opening. The size and/or form of the finished opening differs significantly from that of the preformed hole. The radial spread of the damages and/or the defects define a lower limit for the amount of material removed.

Abstract: The invention includes retrofitting a plasticating machine for the working and forcing of plastic material into a moldor die, the machine including an elongated housing having a first or proximal end and a second or distal end, and elongated screw shaft with a screw flight therearound. The screw shaft is rotatably supported in the elongated housing, for the working of plastic between the screw shaft and the elongated housing with at least one delivery conduit generally longitudinally arranged through the screw shaft, from a location proximal to the distal tip end of the screw. To accomplish such delivery, the screw shaft is replaced with a corresponding screw shaft with a bore extending through the distal tip end thereof, or the existing screw shaft is machined to have such a bore extend therethrough, from location proximal to the distal end out through the distal tip end. The bore in one embodiment may extend completely through the screw shaft, from its proximalmost end to its distalmost tip end.

Abstract: A method for drilling holes into a mantle of a cylinder of a paper machine while the cylinder is in its site of operation in the paper machine. The holes are drilled into the cylinder mantle by a drilling device having drill bits and which is transferred after each drilling cycle to the next drilling position. When drilling the holes, the device is supported on cylinders placed adjacent to and above the cylinder to be machined and/or on the cylinder to be machined by fastening supports of the device. Before the drilling is started, the device is locked in its position by locking fastening supports in a desired position and, the holes are drilled into the cylinder placed underneath from the top toward the bottom.

Abstract: A system and method are disclosed for drilling into an object with a drill bit. The system comprises: (a) a frame having a front and back orientation and at least one configuration, the at least one configuration being a drilling configuration; (b) a driving assembly supported by the frame during drilling, the driving assembly transferring a rotational force from to a drill bit, and, at least initially, providing a forward axial force to the drill bit; and (c) attachment means for releasably and rigidly securing the frame to the object.

Abstract: A drill jig for installing a lockset in a hanging door with an aperture for the lockset. The drill jig has a plate with a plug on one side dimensioned to fit into the aperture. An array of drill bushings is mounted in the plate aligned with a level on the top edge of the plate. Rubber feet protect the the door from being marred by the plate. The plate is positioned against the door in preparation for drilling holes through the drill bushing into the door.

Abstract: For influencing the run of a deep hole drilled passage in a metallic or non-metallic material a pusher pad (6) variable in strength and position is interposed between the drill rod (2) driving the drill tool (1) or the drill tool (1) itself and the inner wall of the drilled passage so that it causes a bending of the drill rod such that the drill tool assumes a changed run. The variation in the position and/or thickness of the pusher pad (6) can be fed back to the sensing of the corresponding position of the drill tool (1) and controlled by the results of sensing.

Abstract: A device for and method of preventing accidents caused by jamming of a tool when working with hand-operated machine tools driving a rotating tool, especially hammer drills, is outfitted with an interrupter device for interrupting the action of the driving motor on the rotating tool depending on the operating state detected by a deflection sensor (1). The device includes a computer unit (R) in which a probability for an expected accident is determined from the sensor signals supplied by the deflection sensor (1), and in that the interrupter device (5, 6) can be activated when a preset accident probability is exceeded. In the method rotational movement values are determined from the measurement signals supplied by the deflection sensor (1), these rotational movement values are converted in a computer unit (R) by nonlinear logic operations to form accident probabilities and activating the interrupter device as soon as the estimated accident probability exceeds a preadjustable threshold value.

Abstract: A drill including a cutter member and a shank which are formed separately from each other and fixed to each other for rotation as a unit, wherein the shank has an engaging groove formed in a distal end face thereof such that the engaging groove extends in an axial direction of the shank and is aligned with a center of the distal end face, and the cutter member consists of a rectangular plate including a proximal end portion fixed to the shank by engagement thereof with the engaging groove, and a distal end portion which is remote from the shank and which has at least one cutting edge.

Abstract: The present invention relates to the multi-splindle machining apparatus which carries out machining of the discontinuous surfaces of a plurality of workpieces simultaneously, and in order to restrain the amplification of chattering, oscillation or the like so as to prevent the machining precision from deterioration, the diameters of plural drive pulleys 7a, 7b, 7c connected to a driving motor are finely varied to change at random the rotational speeds which are transmitted from the drive pulleys 7a, 7b, 7c through belts 10 to driven pulleys 8 provided on each machining spindle 3a, thus changing irregularly the timings at which cutting edges 9 of the machining spindles 3a pass the discontinuities such as joint portions s.

Abstract: A deburring machine essentially comprising a cutting tool (13) which pivots on an axis (16) that is perpendicular to the axis of rotation (X) and which may be retracted inside the cover (11) by a wedge (10) so that the cover (11) may be inserted through a hole; the cutting tool (13) may then be extended and opened out to deburr the edge of the hole situated on the hidden face of the part. The cutting tool pivots freely in order to adopt the correct angle for the edge to be deburred.

Abstract: A machine tool includes a spindle having a cutting tool for cutting a workpiece. For fault detection, a control unit of the machine tool detects a value representing a torque applied on the spindle while the spindle is stopped in a state the cutting tool is engaged with the workpiece. The control unit further compares the detected value (representing a torque) with a predetermined threshold thereby to determine that a fault has occurs. Since the detection of the value representing a torque is performed while the spindle is stopped, the detection is free from the effects of acceleration or deceleration of the spindle.

Abstract: A tool for removal of rivets includes three main sections--a tubular body section, a base, and a drive shaft assembly. The drive shaft assembly includes an upper portion to be received in the chuck of a rotational source of power and a lower portion to be received in the bore of the tubular body. An internally threaded drill receiving socket is disposed at a lower end of the lower portion of the drive shaft. The body section includes a coil spring for retracting the drill and a drill stop bushing for limiting the depth of penetration of the drill bit into the rivet. The base includes an upper disc and a larger diameter lower disc and three equally spaced tubular legs connect the upper disc to the lower disc. The bottom of the base includes a non-slip polymeric pad for contacting a work surface surrounding the rivet and stabilizing the cutting path of the drill.

Abstract: The invention therefore provides a tool holder for tools supplied with coolant or lubricant, especially rotating tools such as boring or milling tools, with an internal duct system for passing coolant or lubricant to the shank of the tool. To enable particularly flexible use of machine tools, the tool holder is equipped according to the invention with a lubricant reservoir which is integrated into the tool holder and which is preferably fillable and pressurizable, which during operation of the tool can be decoupled from a coolant or lubricant source and supplies the tool controllably with coolant and lubricant via a metering unit.

Abstract: An apparatus and method are disclosed for controlling the rate of application of a machine tool to a work piece by compressing a lubricating agent, and then distributing the compressed lubricating agent to lubricate and cool a cutting point of the machine tool. A rod (15) translates axial forces from the machine tool (170) to compress a lubricating agent provided in a compression chamber (70). The pressurization of the lubricating agent creates a counter force to regulate the motion of the machine tool (170), and also forces a lubricating mist out of an exhaust opening (75) which can be directed by an air passage (80) to any point where lubrication is desired.