Abstract: A machining center, particularly adapted for automated turning of workpieces, includes a headstock with one or more rotatably mounted spindles located in spaced generally horizontal alignment with drive means connected to rotate the spindles independently of each other as necessary. Automatic chucks or collets are mounted on and driven by each spindle. A bed supporting a power-driven cross slide extends across the axis of the spindle and at one end substantially beyond, in an offset T configuration, defining one or more machining areas between the chucks and one end of the bed. A ram carrying one or more tools, and mounted on the slide parallel to the spindle axes, faces into the machining area. A ram drive moves it toward and away from the chuck to maneuver a tool with respect to workpieces.

Abstract: A method of lubricating a metal working machine which has (i) at least one sliding machine surface requiring lubrication and (ii) a metal working section wherein metal is worked in contact with a metal working fluid, said method comprises applying a lubricating oil composition to said at least one sliding surface and using as said metal working fluid an aqueous working fluid composition comprising said lubricating oil composition diluted with water, the ratio of water to said lubricating oil composition being at least 3 to 1,said lubricating oil composition comprising:(A) 10 to 90% by weight of at least one oil selected from the group consisting of a mineral oil and a synthetic oil,(B) 0 to 30% by weight of at least one extreme pressure additive selected from the group consisting of sulfurized fat and oil, a phosphate, a phosphite, and an amine salt of phosphate or phosphite and(C) 10 to 60% by weight of an emulsifying agent selected from the group consisting of an anionic surface active agent, a cationic sur

Abstract: A cutting machine is provided in which the front and rear vises which deliver the material to be cut to the blade are mounted together on the same elongated guide members so as to insure a perfectly even cut across the material. Additionally, there is provided a pan for collecting the cutting chips and cutting oil from the work area as well as a filter for separating the cutting chips from the cutting oil.

Abstract: A tool for maintaining ice baskets associated with a nuclear reactor system. The frame of the tool includes a platform which is disposed on a lattice support structure surrounding a selected and isolated basket. The tool includes an electric drill mounted for vertical reciprocation, in parallel axial relationship with the ice basket, and plural, selectively connectable auger shaft sections having a continuous helical fin thereabout which are connected in succession between the drill and a rotary drill bit, for drilling a hole of the required length, down through the ice within the ice basket. The drill then is maintained at an upper, vertically fixed position and a funnel positioned about the auger; ice chips or flakes are fed into the funnel while the drill is driven in reverse rotation, the auger conveying the ice to the bottom of the ice basket for filling lowermost voids and for filling successively higher voids as the auger is withdrawn.

Abstract: Disclosed is a machine tool collet having a collet body having a shaft for receiving a cutting tool at a forward open end thereof and a rearward open end insertable into a tool holder means, at least one first axial slit opening into the rearward open end of the shaft and at least one second axial slit opening into the forward open end of the shaft, and a transverse channel connecting the first and second axial slits to thereby provide a pathway for the flow of a fluid from the rearward open end of the shaft to the forward open end of the shaft to thereby enable the fluid to move from the cutting tool machine through the collet to the workpiece during the cutting operation.

Abstract: An accumulator tank is mounted on a working head of a replaceable head type machine tool. The tank is connected to each spindle housing on the head to deliver a pressure fluid and jet the same forwardly through the interior of the housing and out an insertion gap surrounding a spindle mounted in the housing. Pressure fluid is supplied to the tank when the head is coupled to a driving unit through respective connecting opening and supply openings. An air jetting opening made in a docking portion of the driving unit to prevent foreign material from lodging therein and blocking entry of a corresponding pin on the working head during coupling can also be the supply opening.

Abstract: The power tool has a magnetic base with superimposed permanent magnet assemblies. The upper assembly can be moved relative to the lower assembly to shunt or reinforce the magnetic field. When the sensing probe is pushed into the base the electric motor can be switched on to rotate a spindle on which a rotary cutting tool is axially mounted. The tool feed is controlled by a handle which can be mounted on either side of the tool housing. A coolant reservoir on the base has a hose connected to a pump which is connected to a manifold supplying coolant to the interior of the cutting tool. The cutting tool is biased upwardly and pinches off the coolant when the tool is raised from the work.

Abstract: Disclosed is a nose piece for a power drill and hand drill with certain modifications made to nose piece and using telescopic bushing having a drill motor, a drill spindle and a drill bit attached to the spindle, the nose piece being capable of macro longitudinal adjustment with respect to the length of the drill bit and rotational adjustment of its position with respect to the drill motor and the work piece.

Abstract: A coolant supply apparatus, and cutting tool incorporating such apparatus, wherein during a cutting operation coolant is supplied from a coolant supply means through a coolant supply member which is spaced from a tool shank mounted supply ring. A valve is included for preventing leakage at the space between the coolant supply means and the supply ring when the coolant is being supplied.

Abstract: The power tool has a magnetic base with superposed permanent magnet assemblies. The upper assembly can be moved relative to the lower assembly to subtract from or reinforce the magnetic field. When the sensing probe is pushed into the base the electric motor can be switched on to rotate a spindle on which a rotary cutting tool is axially mounted. The tool feed is controlled by a handle which can be mounted on either side of the tool housing. A coolant reservoir on the base has a hose connected to a pump which is connected to a manifold supplying coolant to the center of the cutting tool. The cutting tool is biased upwardly and pinches off the coolant when the tool is raised from the work.

Abstract: A device for effecting a seal against an underlying surface (5) in conjunction with drilling a hole therein, comprising an inverted cup-shaped member (9,11) whose rim (23) is intended to sealingly abut the underlying surface around the site of the hole (3) to be drilled, and the bottom (11) of which remote from the underlying surface is provided with a hole (27) through which a drill (1) is able to pass in at least substantially sealing fashion in conjunction with a drilling operation. The inverted cup-shaped member includes a tubular, annular element (9), which constitutes a cup-wall element, and a plate-like cover member (11) which forms the bottom. The cover member (11) is removable and therewith exchangeable, and can be mounted on the annular element in an at least substantially sealing fashion in a number of mutually different rotational positions, and is provided with an excentric hole (27) for the drill (1).

Abstract: Device (1) for facilitating the circulation of fluid coolant having, in compact form, a circulating pump (7), a settling cascade (17) and a negative-pressure pump (20) for suctioning a workpiece (54) onto a worktable (21). The transfer pump (7) and a negative-pressure pump (20) are connected to operate with one another in the coolant cycle and to prevent loss of coolant.

Abstract: A holder for a cutting tool has a main spindle formed with a bore to receive the cutting tool, a casing mounted on the main spindle, and an oil receiver stand secured to the casing. The main spindle, casing and receiver stand are each formed with an oil passage communicating with one another to feed cutting fluid to the cutting tool. The holder is characterized in that an intersifier for increasing the feed pressure of the cutting fluid is provided in an annular chamber provided around the main spindle in the oil passage to the cutting tool.

Abstract: The invention is a rotary selectively directional valve assembly for use in an automated turret lathe for directing a stream of high pressure liquid machining coolant to the interface of a machine tool and workpiece for breaking up ribbon-shaped chips during the formation thereof so as to inhibit scratching or other marring of the machined surfaces by these ribbon-shaped chips. The valve assembly is provided by a manifold arrangement having a plurality of circumferentially spaced apart ports each coupled to a machine tool. The manifold is rotatable with the turret when the turret is positioned for alignment of a machine tool in a machining relationship with the workpiece. The manifold is connected to a non-rotational header having a single passageway therethrough which conveys the high pressure coolant to only the port in the manifold which is in registry with the tool disposed in a working relationship with the workpiece.

Abstract: A tool holder for holding a rotary cutting tool, attachable to a spindle of a machine tool, has a holder body fixed to the machine spindle. A rotatable shaft having a tool-mounting portion is coupled to the holder body such that the shaft is axially and radially displaceable relative to the holder body. A positioning member is fixedly disposed on the machine tool body radially outwardly of the machine spindle. A casing is disposed radially outwardly of the rotatable shaft such that the casing and the rotatable shaft are rotatable relative to each other, the casing being engageable with the positioning member to accurately position the rotatable shaft when the holder body is fixed to the machine spindle. A guide bushing is fixedly supported at one axial end portion of the casing remote from the holder body.

Abstract: A tap extension having a dual-mode coolant delivery system is disclosed which is adapted to connect a thread-cutting tap with an associated machine tool spindle having a pressurized coolant supply. The extension includes a generally elongated shank portion, with a locking arrangement provided at one end thereof for receiving and releasably retaining a tap in driven relation with the tap extension. Notably, the tap extension includes a valve arrangement whereby pressurized coolant is directed: (1) through the axial bore of a tap in a first mode of operation, or (2) exteriorly of a solid tap to between its cutting flutes in a second mode of operation. Versatile and efficient thread-forming in either blind holes or through holes is thus facilitated by use of the present construction.

Abstract: A pilot pin-locking means for a drilling machine including a drilling tool, a hollow shaft for supporting the drilling tool and provided with a lubricating means, a bearing means mounted on the drilling machine, the shaft being supported by the bearing means for vertical movement and rotation about an axis, further including a pilot pin inserted through the center of the drilling tool for vertical movement.The hollow shaft receives an engaging means that engages the pilot pin under the resilient action of a spring in a vertically movable manner. The engaging means is detachably locked to and biased against the inner face of the hollow shaft.

Abstract: A deep-drilling tool, embodied by a tube provided with an internal passage and on the end of which a drill head is attached, the tube being divided into two tube sections, the rear one of which in the drilling direction has a diameter larger than that of the drill head. The entire drilling tool can accordingly be removed together with the drill head through a bearing or lubricating-oil supply device for replacement without disassembling the tool.

Abstract: A tool changer for a deep hole drilling tool which has an internal passage for supplying or removing lubricating oil is described. The deep hole drilling tool is received such that it is adjustable in length in a tool receptacle, which on its receiving part has a groove which is engaged by clamping elements. These elements are provided in pivotable fashion in a tool adapter to which the receiving part belongs. They are held in the clamping position by spring-loaded parts and can by unlocked via a shifting sleeve counter to the force of the springs.

Abstract: An underwater tapping machine having a body equipped for attachment to a fitting secured to a pipeline and a rotatable boring bar within the body, a gear case affixed to the body to activate the boring bar, a containment vessel supported by the tapping machine body having a first opening communicating with the vessel exterior and thus to the pressure of fluid in which the tapping machine is employed, the containment vessel having a second opening and a fluid barrier pressure transmitting member dividing the interior of the vessel into a first portion having the first opening therein and a second portion communicating with the second opening, the second portion having liquid lubricant therein, and conduits extending from the containment vessel second opening to the interior of the tapping machine body and gear case so that the pressure of fluid in which the tapping machine is employed is applied by way of the pressure transmitting member to the liquid lubricant and thus to the interior of the tapping machine t

Abstract: An arrangement for supplying coolant to rotating cutting tools (1) for metal machining, in particular boring tools provided with coolant ducts (2,3), includes a coolant ring (4) arranged rotatably on the tool shank and sealed with respect thereto and having a radially projecting coupling piece (6) provided with a radial coolant bore. On a carrier piece (10) there are provided two intermediate parts (12) arranged at a distance from one another, each of which is swingable at one end (12a) with respect to the carrier piece (10) about an axis extending parallel to the boring tool axis (A), is slidable in a plane extending perpendicular to the boring tool axis (A) and can be clamped with respect to the carrier piece (10), and each of which has at its other end (12b) a bore (16) extending parallel to the boring tool axis (A) for a fixing bolt (17) which can be screwed into a stationary machine part (S).

Abstract: A deep boring machine is described which has a spindle unit (2) with a horizontal spindle shaft (40) for receiving a boring tool (50). The spindle unit is horizontally displaceable on a machine bed (1) and is driven by a spindle drive mechanism (2). The boring head (6) is guided, upon initial boring of the workpiece (11), in a jig bushing (7) which is disposed in a jig bushing holder (13). The jig bushing holder (13) is displaceable on a guide (25, 26) in the direction of the spindle shaft (40). The guide (25, 26) is disposed above and offset parallel (h.sub.1, h.sub.2) from the spindle shaft (40) and extends at least partly beyond the machine bed (1). A workpiece clamping table (19) is disposed adjoining the machine bed (1) and is adjustable independently thereof.

Abstract: A chuck provided with a collapsible collet for holding one of a number of twist drills of different diameters is equipped with a holder for the collet, the holder being one for mounting in an appropriate power tool such as a drill press or lathe. There is a stationary sleeve within which rotate the holder, collet and drill. For lubricating and cooling the cutting operation where the drill engages the work, use is made of a pipe fitting in a boss on the stationary sleeve. A fluid line to the pipe fitting continuously supplies a cooling lubricant which flows from there through a succession of passageways in the sleeve and the holder so that the lubricant is ultimately discharged into axially extending slits of the collapsible collet. Emerging from the slits the lubricant flows over the surface of the drill until it reaches the cutting edge, the flow being in sufficient volume to wash away chips.

Abstract: In known deep-hole drilling machines, the undesirable situation arises, in the case of large drilling depths, that the boring bar, which becomes increasingly softer with increasing drilling depth, sags and starts to vibrate, so that the boring bar must be supported. This should, however, be possible at suitable spacings in the simplest possible manner and without interrupting the working process. For this purpose, it is envisaged that at least one guide bush for supporting the boring bar in a workpiece bore is provided on the boring bar, the guide bush being associated in a coaxial arrangement with a clamping ring of a ringe thickness which makes self-jamming tilting on the boring bar possible, and which clamping ring is pivotally coupled at one peripheral point to the guide bush to permit a small radial movement and has an external diameter smaller than that of the guide bush, and that at least one disengageable stopping device for a guide bush is provided within the coolant feed device.

Abstract: An apparatus and method are disclosed for reducing the oxygen concentration at the interface between a cutting tool and a relatively rotating metal workpiece. The apparatus comprises (a) a supporting means for holding the cutting tool in a predetermined position relative to the workpiece, and (b) means effective to direct a plurality of discrete flows of inert gas between the cutting tool and workpiece in a manner to substantially reduce the oxygen concentration in the zone to a predetermined level. The method comprises (a) directing a first stream of inert gas closely adjacent the interface, and (b) directing a second stream of inert gas to at least partially surround the first stream.

Abstract: A distributor body is idly mounted on the toolholder through rolling bearing means and a connector for feeding coolant even during the rotation; an off-center piston member on the distributor body and with a passage for the coolant is able to match the coolant plug on the machine nose; the piston can slide to engage and respectively disengage the toolholder and the distributor body upon the drawing out and respectively the fitting of the group from and into the machine spindle.

Abstract: A tapping lubricant dispenser apparatus is provided for use in numerically controlled automatic toolchanger machining systems to dispense tapping lubricant into a previously drilled hole before tapping. The tapping lubricant is usually a viscous tapping compound of the consistency of paste, grease or the like. The apparatus includes a toolholder of the type to fit into the machine spindle, a reservoir for a supply of lubricant--typically sufficient to run unattended for several complete cycles, e.g. at least one shift--and a reciprocating pump that dispenses the lubricant responsive to actuation by the numerical control system when the toolholder of this apparatus is fitted into the machine tool spindle. The reservoir reloads the pump after each dispensing action. The numerical control and toolchanger system is programmed to select the apparatus, put it in the spindle, align same with the hole to be tapped, and causes pump reciprocation and dispensing and then remove the apparatus from the spindle.

Abstract: In the machining of composite material, improved rates of material removal and reduced machine tool wear are achieved by a cutting fluid comprising the binder of said composite in an uncured state.

Abstract: A block assembly is adapted to be removably fixed to a vertically disposed way of a machine having systems for automatically supplying lubricating oil to the way and for supplying a dissimilar liquid coolant to a workpiece; the block assembly serving to collect lubricating oil flowing downwardly along the machine way and prevent its contaminating the coolant. The block assembly comprises a multi-sectional block shaped to provide an oil collection reservoir adapted to be placed in flow communication with a separate oil collection tank or sump.

Abstract: A power tool having a plastics material housing and a power output spindle is provided with a tube-like metal member in the front end of the housing. A bearing is received within the tube-like member for supporting the spindle. The tube-like member has at the front end thereof radially outwardly extending tabs for dissipating heat therefrom. The tabs are preferably partially embedded in the plastics material of the front end of the housing for anchoring the member therein, alternate tabs preferably being angled rearwardly. The member may also support ratchet teeth of a hammer drill. A fan may be mounted on the spindle in the region of the front end of the member for facilitating dissipation of heat from the radial tabs.

Abstract: Drill structure including an improved drill with indexable inserts, the drill including a straight fluted end with increased chip clearance and decreased clearance between the outer periphery of the end and the bore surface for reduced chip binding. The drill includes a grooved barrel which is received in a bushing fixed with respect to the workpiece to prevent wobble and to precisely locate the bore.

Abstract: A drill press and stand providing an improved apparatus for cutting holes in plate vitreous material. The drill press includes a drill motor, a drill tool attached to the drill motor for cutting through the work piece, and a motor support interconnecting to and supporting the drill motor on the stand. The stand includes a base which is attachable to the work surface by a large suction cup which is attached to the lower surface of the stand base. The stand also includes a collar integral to and generally perpendicular to the upper surface of the base into which a mating drill press standard, a part of the motor support may be inserted. The motor support also includes a positioning mechanism for longitudinally moving the drill motor along the standard and may include a biasing spring to counteract the weight of the motor, etc.

Abstract: The present invention relates to a tool cooling device for machine tools in which a plurality of cooling fluid distributing units are provided on a fixed shaft having a hole formed therethrough and communicating with a source of cooling fluid and each of the distributing units is connected preliminarily to one of the tools with oil holes which are accommodated in the tool magazine of a machine tool, whereby when selected one of the tools is engaged as such with the spindle, the cooling fluid is automatically supplied only to the tool engaged with the spindle.

Abstract: A cutting and chamfering apparatus for opposite ends of a tubular member including a cutting and chamfering support for holding horizontally the member, two tables provided respectively at opposite ends of the support, and a cutting machine and chamfering machine mounted in combination on each of the tables.

Abstract: This disclosure relates to a tool for boring or drilling holes in relatively hard, thick material such as sheet steel. The borer includes a tubular, cylindrical part having cutting teeth on one end edge. The borer part is designed to be rotated on its tubular axis and to be advanced in a forward direction to move the teeth against the material to be bored. The teeth are circumferentially spaced and are, alternately, inner cutting teeth and outer cutting teeth. The teeth are formed at the leading corners of radially thickened portions of the part, and channels or grooves are formed between the spaced teeth for the efficient removal of shavings. The teeth cut an annular groove, the inner teeth cutting at the radially inner corner of the groove and the outer teeth cutting at the radially outer corner of the groove.

Abstract: The present invention relates to a deep drilling machine including an elongate base, a headstock at one end, a tailstock at the other end, each of the headstock and tailstock being shiftable axially of the base by drive device interposed between the base and each of the headstock and tailstock. A coolant supply apparatus having a chuck member is interposed between the headstock and tailstock at a central position along the base. Devices are provided for enabling the chuck member of the coolant supply devices selectively to face the headstock or the tailstock as desired. The chuck of the headstock is provided with drive device. By the foregoing arrangement a chuck member may be oriented toward the headstock or the tailstock whereby the device may be set up such that either the workpiece or the drilling tool is rotated without the necessity for providing drive device at both the headstock and tailstock ends of the device.

Abstract: A deep boring or drilling mill, especially of the horizontal type, comprises a machine bed. A headstock and a tailsotck are operatively arranged on the machine bed. A cooling medium supply device is operatively arranged between the headstock and the tailstock and participates in or performs a clamping movement. The displacement movements of the headstock and of the cooling medium supply device are synchronized with each other during the clamping phase and during the release phase of these displacement movements. Preferably, the length and speed of the displacement movements are balanced or adjusted by an electrical bridge circuit.

Abstract: The invention is an improved endodontic apparatus device for holding instruments, particularly endodontic drill files that are energized and vibrated by ultrasonic means. The invention also provides for the flow-through of solutions during debriding and irrigating of root canals. The invention consists of a hollow tube-like means for conducting solution and directing it in the axial direction of the endodontic drill file; the hollow tube-like means incorporates a special holding means at the outboard end thereof for mounting the drill file in a position so that ultrasonic waves can be transmitted to the drill file to cause it to vibrate in a manner that improves debriding of the root canals. The special holding means at the end of the hollow tube-like means retains the drill file in a firm position to receive the transmitted ultrasonic waves.

Abstract: The invention relates to a method and an arrangement for cleaning cutting fluid used for metal machining. The cutting fluid is withdrawn from the collecting tank (1) at a metal cutting machine by means of vacuum and conveyed to a central cleaning plant by way of a container (3) connected to a vacuum pump. From the cleaning plant the cutting fluid is returned to the collecting tank (1) at the metal cutting machine. The cleaning plant may with advantage comprise a separation tank (6), where separation takes place by gravity and a centrifugal separator (8).

Abstract: A system for washing chips from the inside diameter of a workpiece. The chip washing system significantly improves the efficiency of a lathe used to machine the inside diameter of a workpiece having a longitudinal flow passage therethrough. The system injects a large volume of fluid into the end of the longitudinal flow passage opposite the end into which a machining tool or boring bar is inserted. The fluid flow removes metal chip cut from the inside diameter of the workpiece. The time that the machining tool or boring bar can be used without damage is increased by both increased cooling at the point of contact with the workpiece and preventing metal chips from becoming fouled around the boring bar.

Abstract: A system for controllably positioning printed circuit boards or the like for the automatic drilling of holes therein. A plurality of individual work positions is provided, together with corresponding work carrier plates having individual or groups of circuit boards affixed thereto. Each work position includes a work table, a drilling machine with associated control equipment, a carrier plate for the circuit boards, and means for supporting the carrier plate and circuit boards above the work table with minimal resistance to lateral movement of the carrier plate and boards. The carrier plates are tied to a central drive system controlled by an automatic control unit in a manner which rigidly maintains close tolerances to lateral movement while permitting vertical displacement relative to the work tables. A master table is included for the drilling of a master template and to prevent displacement errors in the holes to be drilled.

Abstract: This disclosure relates to apparatus and method of forming circular holes in plate glass. A circular cut is made in the glass to a predetermined depth, which is less than the thickness of the glass by approximately 0.5 to 1.0 mm. After this cut has been made, the cutting apparatus is removed and the glass is softly struck adjacent to the circular cut in order to break loose the glass disc enclosed by the cut. The edge or margin of the hole may then be smoothed by grinding or polishing. The glass cutting apparatus includes a circular saw or glass cutter which is rotated to cut the glass. A stopper of the apparatus is adjustably mounted adjacent the cutting edge of the saw and stops the saw from cutting further after a predetermined depth has been reached. The position of the stopper may be adjusted for different thicknesses of glass.

Abstract: A pouring ladle is mounted on a carriage which is movable along a track by a motor drive coupled thereto through an overrunning clutch. Movement of the carriage along the track is interrupted at a predetermined position to align the tap hole of the ladle with a rotating reaming tool. The reaming tool is axially advanced into the tap hole for reaming and then retracted and the carriage is released for continued movement along the track. The reaming tool is a hollow tubular body having a longitudinal relief slot penetrating the side thereof and an annularly shaped reaming head is concentrically and removably secured to the forward end of the body and air is fed forward under pressure into the rearward hollow end of the body for cooling and clearing of reamed cuttings.

Abstract: In a fastener driving tool having a fastener holding nosepiece comprised of three concentric sleeves, the middle one of which is axially movable to carry a circumferential array of radially shiftable balls to and from inwardly cammed engagement against cam surfaces in the outer sleeve to grip the fastener head against the inner sleeve and release the head, improved structure wherein (1) the inner and outer sleeves have portions axially displaced from the middle sleeve which are threadedly connected to adjust the axial distance between the cam surfaces and inner sleeve for accommodating fastener heads of different axial thicknesses and radial tolerances; (2) to facilitate interchangeability of nosepieces, the inner sleeve is axially slidably retained on an adapter sleeve against a spring bias by a pin and slot connection with inner and adapter sleeves having means cooperable upon relative turning thereof to withdraw the pin from the slot and the pin being movable inwardly into engagement with a retaining ring

Abstract: A method for forming at least one air vent or hole in a casting mold made of molding said and having a top flask with at least one blind hole originating at its parting plane with a bottom flask comprises the steps of pressurizing the mold cavity and drilling the air vent or hole into communication with the blind hole while drawing off the materials produced by drilling directly at the drilling point. An apparatus for performing the above-noted method includes, according to a preferred embodiment, a source of compressed gas having a pressure hood mountable over the inlet of the mold, and a drilling tool disposed within a suction hood which is placed in a sealing engagement with the top flask after the drilling tool has been properly aligned with the blind hole that is to form part of the air vent or hole.

Abstract: A numerically controlled machining center has a tool magazine, automatic tool changer, workpiece shuttle, and a workpiece magazine which holds enough workpieces for operation by the machining center for an entire shift of approximately eight hours. The numerical controls are programmed to perform predetermined machining operations on each workpiece, in turn, and to replace each finished workpiece with a fresh workpiece at the end of each machining program. A proximity switch is mounted on the machining center for checking tools to detect broken or incorrect tools. The tools are positioned adjacent to the proximity switch and are rotated while the output of the proximity switch is counted for one complete rotation of the tool to determine the number of radially extending teeth on the tool. If the tool has too few or too many teeth, thus indicating a broken or incorrect tool, it is replaced by another tool of the same type.

Abstract: A positive feed drill having an elongated spindle mounted for reversible longitudinal motion in a drill housing. The spindle has an hexagonal cross-section with the apices of the hexagon being threaded. A toothed drive gear having a hexagonal aperture centrally thereof has a close sliding fit with the spindle and is mounted for rotating the spindle. A feed gear having a threaded aperture centrally thereof is in threaded engagement with the spindle apices and is selectively rotated at a different rotational speed than the drive gear to longitudinally advance and retract the spindle. A gear for driving the feed gear is pin-slot locked to a motor gear for longitudinal spindle advancement, and is pin-slot locked to the housing for rapid spindle retraction. A pneumatic circuit in cooperation with limit valves and stop members provides completely automatic drilling to an adjustable depth, a dwell, and a positive retract operation with an economy of pneumatic energy.

Abstract: A coolant system for a machine tool is disclosed. Sockets on the machine tool are equipped with check valves biased to a closed position. When a tool is inserted into a socket, an actuating member opens the check valve to enable coolant to flow through a conduit in the tool to the cutting edge of the tool. Tools whose cutting edges do not require coolant are not equipped with the actuating member. In addition, a distributor is provided for use in the coolant system of a machine tool having a turret. The distributor is mounted on the turret and is coaxial with the axis of rotation of the turret. Coolant is piped into the center of a distributing member having an outlet on a cylindrical side surface. A receiving member has a cylindrical chamber in which the distributing member is rotatably disposed. The receiving member has a plurality of radially disposed passages which lead from the receiving member to the tool receiving sockets on the turret.

Abstract: A lubricator for an automatic riveter positions an absorbent pad containing a liquid lubricant in the path of the riveter's drill bit when the bit is being moved laterally. The absorbent pad is resiliently held to ensure contact between the pad and the drill bit. When drilling only, the pad is mounted at an angle to a cylinder and is driven back and forth by the cylinder to contact the drill bit and transfer lubricant.

Abstract: A combined tool for precision boring and burnishing the internal surfaces of workpieces comprises a bore head arrangement, a burnishing head arrangement rearwardly of the bore head arrangement and a feed tube arrangement connected to the burnishing head arrangement for axially advancing the latter and the bore head arrangement into a rotating workpiece for finishing the internal surface thereof while a stream of flushing oil under pressure is fed about the tool for removing chips shaved off by the bore head arrangement. The bore head arrangement is provided with a plurality of circumferentially displaced oil pockets which are supplied with oil under pressure for hydrostatically supporting and guiding the bore head arrangement during its advance.