Abstract: A method and apparatus for directing a coolant stream onto a cutting tool is made up of a nozzle pivotally mounted on a machine tool, the nozzle being automatically adjusted in response to movement of the machine tool via a retractable plunger or other linear drive member so as to cause the coolant stream to intersect the interface between a workpiece and each cutting tool that is brought into cutting position on the machine tool; and the nozzle is pivotal between a reference position and a different intermediate position corresponding to the length or diameter of the cutting tool which is advanced into cutting position.

Abstract: A process for the cutting or non-cutting forming of metals using two cooling lubricants, wherein an oil or a first emulsion having an oil content of at least 10 wt. % is applied to the workpiece, as a first cooling lubricant, at the tribo-zone and, at the same time, an oil-free cooling lubricant or a second emulsion that is an oil-in-water emulsion having an oil content of less than 10 wt. % is applied, as a second cooling lubricant, adjacent to the tribo-zone. Depending on the metal-working technique, a two-component nozzle is preferably used for supplying the first and second cooling lubricants, the jet of second cooling lubricant surrounding the jet of first cooling lubricant concentrically. Alternatively, it is possible to supply the first cooling lubricant directly to the tribo-zone through channels in the tool, while the second cooling lubricant is applied at the periphery.

Abstract: The present invention prevents coolant from leaking out of a valve (23) after a feed pump (4) stops feeding the coolant, and diminishes a time-lag between the onset of feeding the coolant and mist generation, when the feed pump (4) starts feeding the coolant again. In the machine tool of this invention, the coolant is fed from a feed pump (4) into a mist generating device (13) provided on the tip of a spindle (8) by way of a feed line (7), and a valve (23) is provided at an inflow part for coolant of the mist generating device (13) to be closed when the coolant pressure within the feed line (7) lowers below a fixed level. A coolant sucking and delivering (2) sucks a fixed amount of coolant in the feed line (7), when the feed pump (4) stops feeding the coolant. On the other hand, the device (2) feeds a fixed amount of coolant into the feed line (7), when the feed pump (4) begins feeding the coolant.

Abstract: A coolant assembly for supplying coolant fluid to a tool includes an outer ring defining an inlet and an insert pressed within the outer ring including an annular channel. The annular channel is in communication with the inlet defined by the outer ring and includes a plurality of passages disposed to direct fluid along an axis of a tool. At least two of the passages are disposed at different angles relative to the axis of the tool to direct coolant along the entire length of the tool in order to provide a uniform and consistent stream of coolant and uniform and consistent temperature of the tool.

Abstract: The present invention relates to a nozzle for use in a metalworking process, whereby the nozzle is designed to precisely deliver an oil-containing liquid and nonflammable gas mixture onto the interface between a metalworking tool and a workpiece, whereby the nozzle is comprised of a tip and a valve body affixed to one another. Furthermore, the present invention relates to a method for cooling and lubricating a tool and workpiece during a metalworking process.

Abstract: A tool-driving device (1), which is particularly provided for machine tools, has an internal drive (9), which serves to drive a tool. Also provided is a control device (36), which detects the movement of the tool-driving device (1) and correspondingly controls its drive (9). The tool-driving device (1) can thus be controlled independently of the other tool-machine controls.

Abstract: A method and apparatus for directing a coolant stream onto a cutting tool is made up of a nozzle pivotally mounted on a machine tool, the nozzle being automatically adjusted in response to movement of the machine tool via a retractable plunger or other linear drive member so as to cause the coolant stream to intersect the interface between a workpiece and each cutting tool that is brought into cutting position on the machine tool; and the nozzle is pivotal between a reference position and a different intermediate position corresponding to the length or diameter of the cutting tool which is advanced into cutting position.

Abstract: The present invention provides a capped collet and a cap attached to the collet, which are capable of efficiently supplying a cooling fluid to a tool according to the type of the tool held therein, and of performing satisfactory cooling. The capped collet comprises: a collet body 10; a cap 11 which is attached to the top-end side of the collet body 10 in an attachable and detachable manner and which allows the tool to pierce therethrough; and a sealing member 12 placed between a tool holder 101 and the cap 11 in order to hermetically seal a space between them. The collet body 10 has a slot 13 formed at least from the top-end side thereof, and an annular projection 21 which is formed on the top-end side and which is coupled with the cap 11. The cap 1 has an annular groove 18 for coupling with the annular projection 21 of the collet body 10, and a cover 22 for covering the end face of the collet body 10 on the top-end side.

Abstract: A machining method and a mist supplying apparatus for use in the method, which provide an excellent cooling effect for a rotation shaft without the need for an ejection nozzle. The machining method comprises the steps of: providing a machine tool which includes a rotation shaft (2) rotatably supported by a casing (1); causing compressed air and a liquid to separately pass through the inside of the casing (1) and into the rotation shaft (2); mixing the liquid with the compressed air within the rotation shaft (2) so as to form the liquid into a mist; feeding the resulting mist along the outer periphery of the tool or through the inside of the tool to a distal end of a generally cylindrical tool fixed to the rotation shaft (2); and supplying the mist to a machining part from the distal end of the tool.

Abstract: A chip suction type machine tool continuously removing chips produced during work machining by air suction, comprising a tool attaching part (200) in which a vent hole (s1) is formed and a spindle head (100) having an air suction hole (s2) communicating with the vent hole (s1) wherein, with the tool attaching part (200) installed on the spindle head (100), a telescoping cylinder means (201) which is formed in an inclined surfaces crossing at an angle (&thgr;) of approximately 60° or below, and facing closely, the direction of the spindle, allows at least one of the downstream end part of the vent hole and the upstream end part of the air suction hole to be deformably telescoped and, in free state, is held in a retracted state so that these downstream and upstream end parts are departed from each other by elastic member (205) which is provided between the downstream end part of the vent hole (s1) and the upstream end part of the air suction hole (s2).

Abstract: A frame-like nozzle for liquid coolant disposed above a machining tool is connected to a vertical main shaft. The nozzle is coaxial with the main shaft and directed downward. The nozzle has an inner peripheral wall, an inner flange formed in or close to the inner peripheral wall, an upper framework having a ceiling serving as a guide surface, and a lower framework. The liquid coolant flows upwardly out from the inside channel in a planar radial manner. The upper framework has an outer peripheral wall serving as an outside guide surface for downwardly bending the liquid and cooperating with the flange to define an outside channel. A flow agitating recess is formed in the wall surface. The lower framework includes a level difference, and forms a floor by which the coolant reaching the lower end of the outer peripheral wall is guided radially inward through the difference. Coolant is allowed to flow downward. The inner edge of the floor defines a circulatory waterfall opening.

Abstract: A rolled plate joining apparatus for joining rolled plates by cutting one surface of the tailing end of a preceding rolled plate and the other surface of the leading end of a succeeding rolled plate while traveling in the width direction and by overlapping the resulting cut surfaces to be joined. The joining apparatus includes machining apparatuses each having a cutter for cutting the undersurface of the tailing end and the upper surface of the leading end, a traversing apparatus for running said machining apparatuses in the plate width direction to move said machining apparatuses to waiting positions outside of the plate width, and cutter cooling apparatuses provided in said waiting positions for cooling said cutters.

Abstract: A cutting tool for a machine tool including a tool body, at least one cutting edge and a cutting medium supplier. The tool body has one and another end portions along an axis thereof and is configured to be attached to a machine tool at the another end portions to be rotatable. At least one cutting edge is provided on the one end portion of the tool body. The cutting medium supplier supplies an atomized cutting fluid or a chilled gas to a place where a work is cut by the cutting edge.

Abstract: The invention relates to a unit for holding a tool for chuck mounting heads used in machining where chips are removed from the worked part and waste material consequently produced. The unit comprises: a tool holder spindle designed to be attached to the chuck of the head; and an extraction device associated to the spindle and comprising an annular manifold comprising a first pipe which extends from a first end giving onto an area close to the tool and ends at a second end equipped with a first union designed to be quickly connected with the inside of a second union which matches the first and which is located at a connection unit associated to the chuck mounting head; said first and second unions forming a detachable coupling designed to connect the extraction device, through a second pipe, to a pump that creates a flow of fluid at a defined pressure along the first pipe so as to remove the waste material produced by machining from the area close to the tool.

Abstract: There is provided a rolled plate joining apparatus equipped with a truck that can travel reversibly in the rolling direction, tailing end pinch rolls that are mounted on the truck and can be moved vertically with the tailing end of a preceding rolled plate pinched horizontally, leading end pinch rolls that are mounted on the truck and can pinch horizontally the leading end of a succeeding rolled plate, machining apparatuses for cutting one surface of the tailing end of the preceding rolled plate and the other surface of the leading end of the succeeding rolled plate, and a pressure welding apparatus for compressing the preceding rolled plate and the succeeding rolled plate with the machined surfaces of the preceding rolled plate and the succeeding rolled plate overlapped to reduce them approximately to the thickness of the rolled plates, including a tailing end centering apparatus placed between the tailing end pinch rolls and the pressure welding apparatus for pressing the opposite width ends of the tailing

Abstract: In order to process a solid processed object with a simple construction, and to process a solid and flat work while effectively collecting particulate scraps, in a machine tool for processing work in which a working table on which the work is mounted and a spindle in which a cutter is installed move relatively to each other, a bellow which telescopes freely is provided, one open end of which connects to the spindle head so as to surround the spindle, and the other open end of which connects to a working table in such a manner as to surround the work.

Abstract: A rotary tool for imparting rotation to a drill or an attachment element (2), and including a rotation-imparting element (14), and apparatus (6) for storing a cooling medium, and a conduit (7) for delivering the cooling medium to an operational side end region of the drill or of the attachment element (2).

Abstract: A work machining method including ejecting from a nozzle a plurality of liquids separately toward a workpiece to be machined and a machining part and mixing the liquids each other as the liquids are made in a mist form; whereby the liquids in a mist form are supplied toward the workpiece to be machined and the machining part, and an apparatus for supplying mist including an air supply tube having an ejection nozzle installed in a work machining apparatus; the air supply tube having a hole on a point of the ejection nozzle and an air outlet in a peripheral area of the injection nozzle; and a cooling water supply tube and an oil cutting fluid supply tube within the air supply tube; wherein each open end of the supply tubes is opened to the hole of the ejection nozzle. With this method and apparatus, the quality of the liquids may not deteriorate, a cooling effect and lubricity are provided at the same time on the parts, and further the pressure of compressed air, water and oil can be separately regulated.

Abstract: The present invention provides a method of producing an electrophotographic photosensitive member capable of obtaining high-quality uniform images without image defects and nonuniformity in image density. The method of producing an electrophotographic photosensitive member includes a step forming a functional film on a substrate, and a washing step of spraying water on the substrate surface from concentrically arranged nozzle groups positioned in a twisted relationship before the step of forming the functional film.

Abstract: A coolant liquid feeding method comprises feeding a coolant liquid, with air bubbles caused to form continuously therein, for cutting or grinding operation to a region under machining, expediting the splashing of air bubbles in all directions when the air bubbles impinge on the region under machining and burst, and also expediting the entry of accelerated splashed liquid particles into a cutter/workpiece pressure contact plane, thereby improving the cooling and lubrication of the region under machining, whereby the air bubbles in the coolant liquid which has failed to reach the region under machining or which, though reaching there, has left there for the recovery channel are allowed to adhere to suspended foreign matters in the liquid, thereby expediting the surfacing of the foreign matters.

Abstract: A cooling apparatus for cooling a tool rotated by a spindle of a machining device. The cooling apparatus includes a tube having a plurality of orifices. The tube is mounted onto a stationary housing about the spindle to substantially encircle an axis of the tool. The apparatus also includes a plurality of nozzles connected to a respective one of the orifices, each of the nozzles directing a discharge of fluid substantially toward the tool.

Abstract: The present invention provides a tool holder which realizes an improved applicability to tools with different diameters and attains high sealability and is capable of efficiently supplying a fluid at a predetermined position even when a fluid of high pressure is supplied. The tool holder comprises: an engaging member 4 provided on the top end side of a tool holding portion of a holder body 2 and comprising an inclined face 15 constructed in a manner such that the inside diameter becomes smaller toward the top end of the tool 10 held by the holder body 2; and an elastic member 5 as a stopper provided between the inclined face 15 and the outside periphery of the tool 10.

Abstract: A selectively attachable dust suppressing misting device for use with percussive tools, such as air hammers or jack hammers, includes a frame having a first tube section connected to a fluid source. The misting device includes one or more misting nozzles connected to the first tube section to allow fluid to flow out of the misting device. The misting nozzles are rotatable to allow fluid to be sprayed in a desired direction. The device also includes at least one adjustable clamp for securing the device to various diameters of percussive tools. Preferably, a second clamp is mounted to a housing slidable on the first tube section to allow the second clamp to be moved with respect to the first clamp.

Abstract: An evacuated enclosure is provided around a circular cutter to collect the cutting dust produced while forming inspection apertures in insulation cladding. The enclosure includes an upper and lower coaxial chamber, the upper chamber provided with an air pump geared to a rotary shaft from a hand tool that also extends into the lower chamber. The hole cutter at the end of the shaft is then advanced through the insulation cladding by the advancement of the shaft through the cover, and the withdrawal stroke removes the cut pluc from the hale cutter while a spray of fixative is released into the enclosure. This fixative coats the loose strands on the plug exterior and also collects on the filter elements, to fix hazardous dust like asbestos from dispersal. The assembly may be combined with a portable power unit which may also include a vacuum device to augment the air draw across the filter.

Abstract: The device is equipped with a taper shank (23), a stationary member axially tapered shape (33), and a connecting member (49). The taper shank (23) is fitted in a deep portion of a shank receiving portion with a taper bore (5) formed at the tip portion of a spindle in such a manner that installation and removal are possible, and is fixedly connected to the spindle (3). The stationary member (33) is rotatably connected to the taper shank (23), and is located in the taper bore (5) with a clearance (35) and has a spray nozzle (37) for spraying cleaning fluid into the taper bore (5) and an inside passage (39). The connecting member (49) is connected, at one end thereof, to the stationary member (33) and is connected, at the other end thereof, to a supply block (13) located at the tip portion of a spindle head (1), and has a connecting passage (53) for continuously connecting a supply hole (15) and the spray nozzle (37).

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.

Abstract: A chip disposal device used in a machine tool for continuously expelling chips produced from a cutting tool such as a drill to another place, while a work is being processed with the tool. In this device, a hooding means (13) is slidably provided relative to a work (w) for forming an air-tight space around a cutting tool (11) such as a drill which is mounted on a spindle (3) of the machine tool by means of a cutting tool mounting member, and an air suction pipe (15) is provided for sucking the air from the space inside the hood. In addition, an air hole (11a) is formed in the shaft of the cutting tool (11) in such a manner that it is open at the tip end of the cutting tool at one end and at the other end is caused to communicate with passageways (p1, p2) open to the atmospheric area. In this case, the air hole (11a) may be connected to a compressed air supply pipe (33) at the other end instead of being open to the atmospheric area.

Abstract: A quill stop for a milling machine, drill press, or other like machine. The quill stop includes means for automatic control of coolant flow. The quill stop includes a passage through which high pressure air flows. A valve in the passage controls the air flow. The valve is activated by contact of the quill stop with a dog stop on the machine. The quill stop may also include a self contained mist unit activated by the valve.

Abstract: A chip adhesion preventing device is capable of preventing chips from adhering to the drill shank of a drill held on a spindle (1) included in a boring machine. Fluid passages (17, 23) are formed in the spindle (1) and a work holding member (19), respectively, and nozzle holes (18 and 22) are formed in the spindle (1) and the work holding member (19) so as to be connected to the outlet ends of the fluid passages (17 and 23), respectively, and to be directed toward the shank (13) of the drill (3). A high-pressure fluid is jetted through the nozzle holes (18, 22) toward the drill shank (13) to blow off chips (15) adhering to the drill shank (13).

Abstract: A method and apparatus for cutting mat board, and more specifically for cutting apertures including non-linear boundaries in mat board. The preferred embodiment of the apparatus of the present invention includes an automatically controlled cutting tool for cutting apertures having bevelled boundaries according to a predetermined pattern. The preferred embodiment of the method of the present invention includes stacking a mat board on a planar substrate and cutting through the mat board into but not through the underlying substrate.

Abstract: For the connection of the sheets of a multi-sheet printed product (14), such as magazines, brochures and the like, the sheets are adhesively connected together point-wise by the introduction of an adhesive into perforations formed in them. During this, the adhesive applied to the outer side of the penetration and drilling needles (20) is transferred onto the sheets over the whole length of the perforations simultaneously with the formation of the perforations by means of these needles (20) and/or on retraction of the needles (20).

Abstract: In a process and a device as well as their use for lubricating and cooling cutting blade edges and/or workpieces in machining operations with chip removal, at least two immiscible fluids are fed to the cutting edges or workpieces. The two fluids include a first fluid for reducing friction between the cutting edge and a workpiece or chip, and a second fluid for cooling the cutting edge, workpiece, cutting edge support and, in case of need, the chips. A surprising increase of the lubricating and cooling effect can be achieved by the fact that the two fluids are stored or processed separately in separate vessels, and each fluid is conveyed from its associated container via a separate feed line to an applicator. Also, each fluid is applied from its associated applicator to the workpiece to be machined or to the cutting edge of the blade.

Abstract: Fluid dispensing and control system for tapping attachments includes a controller mountable upon a machining center and connectable between the tapping attachment and a source of cutting fluid, as well as to the machine's recirculating coolant flow. Connection of the tapping attachment to the machine through the controller determines whether cutting fluid or coolant will circulate to the tapping attachment.

Abstract: A router includes a motor housing having first and second clam shell halves forming an air inlet and a stator forming an air outlet, the housing having a central axis therethrough. An electric motor having a rotary armature, an armature shaft and a stationary member is fixed with respect to the housing. An axial fan is fixed to the armature shaft and positioned between the rotary armature and the stator for drawing air across the armature and stationary member. The fan has a plurality of radially extending fan blades tilted with respect to the central axis for forcing air in a substantially helical path. The stator includes a plurality of radially extending stator blades oppositely tilted with respect to the fan blades and the central axis for receiving air moving in a helical path from the fan blades. The stator blades are configured to cause air to swirl in a predictable manner when leaving the housing.

Abstract: An automated air-burst control device is provided for use with a machining tool to clear away fragments of a work piece being machined. The air-burst control device includes an inlet pneumatically communicating with a source of compressed air. A control valve pneumatically communicates with the inlet, and is movable between open flow and closed flow conditions. The control valve is normally disposed in the closed flow condition for blocking air flow from the inlet through the control valve. An actuator is operatively connected to the control valve, and responsive to a triggering event for moving the control valve into its open flow condition to release air flow from the inlet through the control valve. An air flow outlet line pneumatically communicates with the control valve, and has a free end thereof directed towards the work piece being machined.

Abstract: A coolant delivery method and apparatus comprising a high and low pressure pump for providing high and low pressure coolant flow through a common conduit to a coolant orifice of a cutting tool of a machine tool or a nozzle of a workpiece flushing station. The high pressure pump has a cylinder with a reciprocable piston operably coupled to a drive for moving the piston to discharge coolant under high pressure to the cutting tool while a workpiece is machined by the tool. A one-way flow valve in the conduit permits coolant flow from the low pressure pump to reach the cutting tool as well as the high pressure pump cylinder to recharge the cylinder with coolant while the high pressure pump is not discharging coolant. Cutting tool failure as well as an orifice obstruction is detected by monitoring coolant flow from the high pressure pump during each machining cycle of machine tool operation.

Abstract: A method of through-hole drilling of metal workpieces having sufficient ductility to create hinged drill caps, which comprises: while carrying out through-hole drilling with low thrust drill tips, directing a fluid jet stream against the drill exit side of the workpiece with sufficient force to retain and resulting drill cap closed against the exit side until such drill cap is completely annularly severed from the workpiece, the jet stream being oriented substantially coincident with the revolving axis of the drill. The fluid of the jet stream may be a machining liquid coolant, a gas, or a water-based solution. The jet stream has a diameter upon impingement with the workpiece that is less than the diameter of the exit opening created by the drill.

Abstract: Within a hood, pressurized cold air is injected from a cold air injection pipe to the spindle and the cutting tool for a machine tool for cooling them and at the same time air is sucked and discharged through a discharge port provided on the hood from the inside of the hood by means of a vacuum pressure produced by a suction device. When air is discharged, a swirl is generated in the hood by discharged air and by deflected air streams passed through a plurality of guide blades provided at the open end of the hood. The cutting chips are floated up by the swirl and discharged together with air through the discharge port.

Abstract: A coolant system is disclosed for use with a machine tool in which coolant is used to both cool and lubricate a workpiece and cutting tool. The system of the present invention utilizes a positive displacement pump with one or more spray nozzles each having a restricted orifice whereby the coolant is sprayed from the nozzles at a relatively high velocity and pressure enabling the coolant to be precisely directed to the cutting location to provide optimum cooling and lubricating of the workpiece and cutting tool. Check valves are provided for both the pump inlet and outlet lines to maintain the pump in a primed condition and prevent drainage of coolant from the coolant system when the pump is not operating.

Abstract: A drilling tool is adapted for incorporation into a riveting robot. For this purpose, the drilling tool with its spindle head is mounted on a slide that is motor driven for displacement in the Z-direction of an XYZ coordinate system. The slide in turn is mounted on a console provided with a flange to be secured or docked to the riveting robot. The console is rotatable about its longitudinal axis that extends perpendicularly to the drill spindle axis and intersects the latter approximately in the center of the spindle axis. The drill spindle is rotatably mounted in a spindle head and carries a drive wheel approximately in the center between the spindle ends. The drive wheel is meshing or cooperating with a power transmission train from a motor that is also secured to the slide and moves up and down with the slide and thus with the spindle head. Another motor drives the up and down movement of the spindle head. This type of arrangement permits positioning the drill bit in difficult locations.

Abstract: A chip collector is proposed which can collect chips efficiently and which is easy to maintain and allows replacement of throwaway inserts without removing the cutting tool from a spindle of a machine tool. The cylindrical casing is divided into two casing halves, one of which is pivotable from the other around a hinge. The chip collector is provided with a sub-chamber connected to a chip suction port and a discharge duct connected to the sub-chamber. Also, a face milling cutter used in combination with the chip collector is proposed.

Abstract: A die handle oiling system for use with a cutting die head comprising a tubular handle having a sealed base end, a sealed tip end adapted for holding a cutting die head thereon, an air cavity for holding air formed therein adjacent to the base end, a plunger cavity for holding oil formed therein adjacent to the tip end and in communication with the air cavity, an inlet valve extended from the air cavity for allowing air to be disposed therein, a pressure release valve extended from the air cavity for allowing air to be released therefrom, a sealable filling bore extended from the plunger cavity for allowing oil to be disposed therein, and an oil outlet extended from the plunger for allowing oil to be released therefrom; a plunger slidably disposed within the plunger cavity; an oil hose coupled to the oil outlet; and an actuatable air pump coupled to the inlet valve for filling the air cavity with air; whereby when the air pump is actuated, air pressure builds in the air cavity and forces the plunger towards t

Abstract: A sealing collet is provided having a plurality of independent gripping jaws longitudinally disposed about a common centerline axis. The gripping jaws have exposed inner and outer faces. A resilient material is disposed between the gripping jaws and holds the jaws in a predetermined longitudinally and angularly spaced relation about the centerline axis of a collet. A continuous outer diameter seal is disposed circumferentially about the conical outer surface of the collet. The outer diameter seal is formed integral with the resilient material. A continuous inner diameter seal is also provided disposed circumferentially within the inner diameter of the collet and also formed integral with the resilient material. At least one coolant fluid channel may be defined in the resilient material in fluid communication with a coolant port defined through the face of the collet for introducing cooling fluid onto the working surfaces of a tool held by the collet.

Abstract: An annular front end base portion, a main portion and an annular rear end base portion form all together a substantial portion of a collet provided with a tapered outside surface adaptable closely in a tapered hole of a collet chuck and a tool holding hole is formed in the axial portion of the collet. In the main portion are formed a first set of axially long radial slits opening at the end surface of the front end base portion and terminating to be closing in the rear end base portion and a second set of axially long radial silts opening at the end surface of the rear end base portion and terminating to be closing in the front base portion. Each of the radial slits of the first set and each of the radial slits of the second set are arranged at proper angular intervals and alternately along the peripheral direction of the collet, and respective zigzag paths are formed which are closed over the whole peripheries of the outside and inside surfaces of the collet, respectively.

Abstract: A hydraulic chuck for securing a lathe shaft and cutting tool to a tool holder is provided with spray nozzles to project cooling fluid on the cutting tool.

Abstract: A device for accurately supplying a fluid such as a cutting fluid to the cutting portion of a tool of any of a wide variety of tools includes a tool holder having an internal fluid passageway and a forward end formed to include an annular fluid supply groove in communication with the fluid passageway, a nozzle ring having nozzles communicating with the annular fluid supply groove, and a coupling ring, which is screwed onto the forward end of the tool holder, for fixedly fastening the nozzle ring to the tool holder in an attachable and detachable manner. A cutting fluid from a fluid supply source is fed under pressure to the nozzles of the nozzle ring through the fluid passageway and the annular fluid supply groove, and the cutting fluid is jetted from the nozzles toward the cutting portion of the tool, such as a drill, held by the tool holder.

Abstract: A cooling and dust collecting apparatus for drilling machine tool is disclosed, which comprises a telescopically expandable/shrinkable cylinder having a base cylinder and a movable cylinder, the base cylinder being disposed on the drilling machine in such a manner that the base cylinder surrounds the drilling machine, the movable cylinder being slidably connected to the base cylinder, the movable cylinder surrounding a cutting tool, a blowing pipe connected to an outlet opening portion defined on the movable cylinder, the blowing pipe being adapted for blowing the cutter with cold air, and a sucking pipe connected to an inlet opening portion defined on the movable cylinder, the sucking pipe being adapted for sucking cutting chips and poisonous gas, wherein the movable cylinder has a joint portion, a forward end portion, and an intermediate portion, the joint portion being connected to the base cylinder, the forward end portion surrounding the drill of the drilling machine, the intermediate portion being dispo

Abstract: A machine tool comprising:a toolholder for holding a tool;a spindle for detachably supporting the toolholder;a spindle support for rotatably supporting the spindle;a drive means for driving the spindle supported on the spindle support;a stop means for preventing the toolholder from rotating relative to the spindle support; anda cutting oil supply means for supplying a cutting oil to the tool via the stop means.

Abstract: A cooling and dust collecting apparatus for machine tool for cooling a cutter mounted on a rotating spindle and for sucking and exhausting cutting chips to the outside of the apparatus is disclosed, which comprises a cooling and dust collecting housing surrounding the rotating spindle and the cutter, a plurality of cold air passages, defined inside the housing, for sending cold air of a pressurized cold air supply portion disposed as an external device to a first cold air delivery hole and a plurality of second cold air delivery holes, a cutting chip exhaust passage, defined in the housing, for connecting a cutting chip sucking device disposed as an external device to an inner space of the housing, and an elastic hood downwardly extending from the lower end of the housing, the elastic hood defining slits at the lower end thereof, wherein the first cold air delivery holes are adapted to blow pressurized cold air toward a shaft portion of the cutter, and wherein the second cold air delivery holes are adapted to

Abstract: A pressure foot (7) of a printed circuit board drilling apparatus is supported on a spindle (2) of the printed circuit board drilling apparatus slidably in the axial direction, and includes a pressing face (13) which presses a printed circuit board (5) at the time of drilling operation, a discharge port (11) formed in a side wall (8) so as to discharge chips produced by drilling operation, the discharge port (11) being connected to a suction device, and a compressed air supply conduit (20A) formed in a side wall so as to eject the compressed air toward a drill bit (4) of the printed circuit board drilling apparatus. A cooling fluid supply device (21) is connected to the compressed air supply conduit (20A). In place of the compressed air supply conduit (20A), a fluid supply conduit (14) for ejecting a cooling fluid toward the drill bit (4) of the printed circuit board drilling apparatus may be formed.