Abstract: A plurality of cutting edges that are arranged on an outer circumference of a shaft-shaped broach body are provided with a spline teeth group, which contains a plurality of spline teeth 8 that groove a prepared hole of a work material, and a round teeth group, which is disposed in a different position from the spline teeth group along an axis direction and contains a plurality of round teeth that machine an inner circumference of the prepared hole. At least one gullet is formed to extend along the outer circumference of the broach body in a circumferential direction around the axis between the round teeth that are adjacent to one another in the axis direction in the round teeth group. The gullet extends toward the axis direction, gradually twisting toward the circumferential direction. The spline teeth group and the round teeth group are formed integrally on the outer circumference of the broach body.

Abstract: A device for keyway broaching is provided with a housing, a drive shaft, a broaching carriage received and supported in the housing, a tool support connected to the broaching carriage, and a crank drive that couples the drive shaft and the broaching carriage with each other. The broaching carriage, when driven by the drive shaft, performs an oscillating movement comprising a cutting movement and a return stroke. A sleeve is arranged between the housing and the broaching carriage. A first seal is provided between the housing and the sleeve and/or between the sleeve and the broaching carriage. The tool support is connected to the broaching carriage with a rocking lever interposed between the tool support and the broaching carriage. The drive shaft has a control section that controls a relative movement between the rocking lever and the broaching carriage.

Abstract: An improved centrifugally-cast tube is provided, along with a related method and apparatus of making the tube. The tube includes a plurality of grooves and bosses that are mechanically machined into an interior surface of the tube, such as by a broaching process. The profile of grooves and bosses may be defined by a plurality of intersecting concave and convex radii. The tube is resistant to creep, carburization and metal dusting. The tube also has an enhanced heat transfer rate, and a desirable surface roughness. A method of making the tube is also provided. The method essentially consists of mechanically deforming the interior surface of the tube by passing a series of cutting inserts on support rings having incrementally-differing dimensions over the interior surface.

Abstract: A broach (20) includes a rough broach section (32) having toothed broach inserts (38) and guides (40) that provide rough broaching of gear teeth, and a shave ring section (34) of the broach includes annular shave rings (60) having internal teeth (62) for providing final shaving of the gear teeth and also having guides (70) that maintain the gear radially centered during the final shaving.

Abstract: An improved centrifugally-cast tube is provided, along with a related method and apparatus of making the tube. The tube includes a plurality of grooves and bosses that are mechanically machined into an interior surface of the tube, such as by a broaching process. The profile of grooves and bosses may be defined by a plurality of intersecting concave and convex radii. The tube is resistant to creep, carburization and metal dusting. The tube also has an enhanced heat transfer rate, and a desirable surface roughness. A method of making the tube is also provided. The method essentially consists of mechanically deforming the interior surface of the tube by passing a series of cutting inserts on support rings having incrementally-differing dimensions over the interior surface.

Abstract: An improved centrifugally-cast tube is provided, along with a related method and apparatus of making the tube. The tube includes a plurality of grooves and bosses that are mechanically machined into an interior surface of the tube, such as by a broaching process. The profile of grooves and bosses may be defined by a plurality of intersecting concave and convex radii. The tube is resistant to creep, carburization and metal dusting. The tube also has an enhanced heat transfer rate, and a desirable surface roughness. A method of making the tube is also provided. The method essentially consists of mechanically deforming the interior surface of the tube by passing a series of cutting inserts on support rings having incrementally-differing dimensions over the interior surface.

Abstract: A process to produce alternately concave and convex grooves that are evenly spaced inside a tube, wherein the process includes the steps of at least one simultaneous broaching stage for all the grooves of the tube using at least one roughing tool and/or at least one finishing tool, the tools made integral with a handle bar using a link, the different roughing tools being implemented successively and having a convex profile that gradually approaches the concave profile of the grooves, and at least one finishing tool having a concave profile to make the convex profile of the grooves.

Abstract: The apparatus of the present invention provides a broaching machine configured to produce an internal gear member. The broaching machine includes a broaching tool defining a central axis. The broaching tool includes a first set of broaching teeth configured to cut only a first flank portion of a plurality of gear teeth; and a second set of broaching teeth configured to cut only a second flank portion of the plurality of gear teeth. The plurality of gear teeth are formed such that the first and second flank portions of each gear tooth are tapered between a first end portion and a second end portion. The broaching machine also includes a motor configured to rotate the broaching tool about the central axis at a selectable rate and in a selectable direction. A corresponding method for producing an internal gear member is also provided.

Abstract: The apparatus of the present invention provides a broaching machine configured to produce an internal gear member. The broaching machine includes a broaching tool defining a central axis. The broaching tool includes a first set of broaching teeth configured to cut both a first flank portion and a second flank portion of a plurality of gear teeth. The broaching tool also includes a second set of broaching teeth configured to cut only the second flank portion of the plurality of gear teeth. The plurality of gear teeth are formed such that the first and second flank portions of each gear tooth are tapered between a first end portion and a second end portion. The broaching machine also includes a motor configured to rotate the broaching tool about the central axis at a selectable rate and in a selectable direction. A corresponding method for producing an internal gear member is also provided.

Abstract: A manufacturing tool (20) for forming a dynamic pressure groove (52) in an inner peripheral surface of a bearing sleeve (50) includes a tool shaft (21) for being rotated in a bore of the bearing sleeve while being moved in an axial direction thereof. Protrusions (25) are integrally and circumferentially arranged on an outer periphery of the tool shaft near a leading end (22) thereof. Machining tips (26) are integrally formed on outmost ends of the protrusions for machining the inner peripheral surface of the bearing sleeve to form the dynamic pressure groove therein.

Abstract: Since the chip-breaking groove 30 is cut in the inner peripheral surface of the prepared hole 22 by compressing the chip-breaking tool 10 into the prepared hole 22 prior to the tapping process (the cutting process of the female thread) by the cut tap, the chip can be securely broken by the chip-breaking groove 30 and well discharged even in the case that the work 20 is made of the material having the high ductility. Accordingly, for example, as shown in FIG. 10, it is possible to prevent a lot of long connected chips from entwining the tap, it is unnecessary to monitor the tapping work, and it is possible to achieve a complete automation (an unmanned work). Further, it is possible to inhibit the cut tap from being broken due to the pinching of the chip, and it is easy to execute a treatment such as a chip cleaning or the like.

Abstract: Disclosed is an apparatus for defining a bending or welding groove in a cutting blade. A pair of fixed blocks are fixed to a base of a cutting blade forming apparatus. A slider is slidably coupled to each fixed block, and a bit support block is slidably coupled to the slider. The slider and the bit support block are respectively operated by first and second operating mechanisms. First through fourth guide parts are formed on the fixed block, slider and bit support block, to constitute dovetail joints. The first guide parts of the fixed blocks and second guide parts of sliders are formed to have a slope, such that, as the sliders are lowered, they are horizontally moved toward each other. A lower portion of a broaching bit is formed as a supporting surface, and at least one broaching edge portion is formed above the supporting surface portion.

Abstract: A spindle for machining inner grooves and including a cylindrical input guide of diameter D1 and a cutting portion. In the spindle the cutting portion is subdivided into a plurality of cutting sections separated by realigning guides having a diameter equal to diameter D1 of the input guide to accurately center the grooves relative to the hole previously machined in the workpiece.

Abstract: Apparatus for machining a groove in an arcuate workpiece segment comprises a horizontal milling table, a carriage mounted on the table and supporting a workpiece to be machined, a milling guide mounted on the carriage and including a vertical post, an arm extending radially from the post, and a milling assembly attached to the arm and including a cutting tool overlying a workpiece mounted on the carriage. The table is movable in x and y directions in a horizontal plane to displace the workpiece along an arcuate path relative to the cutting tool, and the milling assembly is displaceable along a vertical axis to move the cutting tool toward and away from the workpiece.

Abstract: A device for forming a cutting blade for prints is disclosed. The device of this invention forms cutting blades by appropriately bending and cutting a metal strip into desired blades through integrated work regardless of a difference in the size of metal strips. The device is also provided with changeable jigs, thus being capable of forming bridge notches having different intervals, widths and configurations. The device has one vertically movable bending pin and one swing cutter. The bending pin is capable of quickly bending a metal strip into a desired configuration, while the swing cutter finely and precisely cuts the metal strip into cutting blades. The device also quickly produces high precision cutting blades, thus improving productivity and reducing the cost of the cutting blades.

Abstract: A tool retention apparatus for retaining a cutting tool in a tool holder which has a wedged shaped securing arrangement to hold the cutting tool against a pair of precision ground supports. The securing member provides both a vertical securing force and a radial location of the cutting tool to facilitate installation and removal of the cutting tool from a machine.

Abstract: A circulating type milling apparatus for milling a lock core keyway includes a frame with a rotating disc that is intermittently rotated through a pre-determined angle. Lock core seats are equidistantly provided on the rotating disc. A milling disc is mounted to a top plate of the frame and includes cutters, ejecting plate, and detectors mounted thereon. The cutters are lowered to mill a keyway in each lock core. When the cutters are further moved downward and thus disengaged from the lock cores, the rotating disc is rotated by a distance that is equal to a half distance between two adjacent lock core seats such that each lock core seat is in a positioning in alignment with an associated detector yet not in alignment with an associated cutter. When the milling disc is moved upward, the detector checks whether the milled keyway of the lock core meets the required standard. The ejecting plate ejects the finished milled lock core, and a new lock core is fed by a lock core supplying device.

Abstract: A device for stabilizing a workstock in a slotted broach tool guide sleeve while a key broach tool extending through the guide sleeve cuts a key slot in the annular bore wall of the workstock. In a preferred embodiment the device is characterized by a pair of top and bottom end plates, each provided with a semicircular notch for receiving the cylindrical guide sleeve at opposite ends of the workstock, after the workstock is positioned on the guide sleeve. Each end plate includes a beveled surface which engages the corresponding open end of the workstock and a plate mount bolt is extended through the end plates and the workstock bore and a nut is threaded on each end of the bolt to secure the end plates against the workstock. The guide sleeve with the assembled device is oriented in a vertical position, with the lower end of the guide sleeve typically secured between the adjacent support plates of a work bench or table and the bottom end plate resting on the work table.

Abstract: A previously used lock assembly constructed for operation using a given key may be operated by a different key after rebroaching. Instead of requiring an expensive, complete replacement of a lock assembly and its operable keys, the present invention allows a lock assembly to be refitted for a different key by a relatively inexpensive replacement of its plug and at least one of the tumbler components, preferably the bottom pin only, of one or more preexisting sets of tumbler components, as needed to modify the lock to receive the different key.

Abstract: The present invention relates to a method and apparatus for forming a longitudinally extending keyway portion in a mill roll having a central bore. The keyway portion may be either a keyway or a tab portion. A cutting head is provided, and includes a body and one or more cutting tools extending from the periphery of the cutting head body. The cutting head is driven through the central bore of the mill roll, and the cutting tools form one or more keyway portions adjacent and communicating with the central bore.

Abstract: A grooving machine efficiently and speedily forms different kinds of grooves on the surface of a plate work (W). The grooving machine comprises a work table (11) on which the work (W) is fixed, a frame (7), an X-axis slider (17) disposed above the work table (11) and horizontally movably supported by the frame (7), a Z-axis slider (19) vertically movably supported by the X-axis slider (17), a tool holder base (75) supported by the Z-axis slider (19), and different kinds of cutting tools (97A to 97C) attached to the tool holder base (75), for grooving the surface of the work (W). Any one of these cutting tools (97A to 97C) is indexed to a cutting position where the work (W) is grooved. The tool holder base (75) has a cutting liquid supply portion (109) for supplying cutting liquid to a cutting zone where the indexed cutting tool cuts the work (W), and a cutting liquid suction portion (111) for sucking and removing excessive cutting liquid.

Abstract: A tool for guiding a push type keyway broach in the broaching of one or more keyways in a single bore of a workpiece includes a bushing fitable into the bore of the workpiece, a rectilinear guideway in the bushing for slidably receiving the base portion of a conventional push type broach, and a guide pin receivable in a selected one of a plurality of angularly spaced radial holes in the bushing and having an externally extending portion dimensioned to slidable fit into a previously broached keyway, thereby to precisely set and hold the broach at a selected, predetermined angle relative to the previously broached keyway.

Abstract: The equal-pitch groove processing device (1) comprises transferring means (10), (40) for continuously transferring a workpiece (100) in an axial direction of the workpiece (100); processing tools (23), (33) in which cutting teeth (23a) of a thickness corresponding to a width of a groove to be processed are formed around an outer peripheral portion along a spiral path, and which is rotatively driven with the center of that spiral as an axis; and controlling means (70), (80) for synchronously operating the processing tools (23), (33) in such a manner that the workpiece (100) is transferred by a one-normal-pitch portion of the spiral while the processing tools (23), (33) undergo one revolution, whereby equal-pitch grooves are formed in the workpiece (100) by the cutting teeth (23a) of the processing tools (23), (33).

Abstract: A broaching bushing for guiding a broaching tool in a workpiece bore during the cutting of a keyway of in an annular surface of the bore. The bushing having two main components: a wedge-shaped member and a broaching tool guide member positionable in longitudinally abutting relation to one another to form a broaching bushing of substantially rectangular cross section for insertion in the workpiece bore. The width of the rectangular cross-section is adjusted to tightly fit the bore by the longitudinal shifting of the wedge and guide members relative to one another. The bushing is sizable to fit into a plurality of standard bores or non-standard undersize or oversize bores.

Abstract: The boss of a steering wheel is serrated by setting the steering wheel on a serrating broaching machine, inserting a serrating broach into a through hole defined in the boss of the steering wheel, and then pulling the serrating broach with a broach chuck gripping the serrating broach to cut serrations on an inner surface of the through hole in the boss. The steering wheel is positioned nonrotatably in a prescribed angular orientation on the broaching machine while placing the boss on a holder of the broaching machine. Then, the serrating broach is inserted through the through hole in the boss into the holder of the broaching machine while holding the serrating broach in a prescribed angular orientation around the axis thereof with respect to the broach chuck. Finally, the serrating broach is pulled from the boss with the broach chuck gripping the serrating broach to cut serrations on the inner surface of the boss.

Abstract: A portable device (10) for excising an axial slot (8) into the boundary surface (16) of an aperture (15). The device (10) includes a guide (11), a machining implement (12) and a power source (13). The guide (11) has proximal and distal ends (19 and 20) with an exterior configuration including at least a horn surface (26) and a transitional surface (30). A reaction flange (21) extends radially outwardly from the proximal end (19) of the guide (11). A slideway (35) extends longitudinally within the guide (11), and a tracking channel (36) extends radially outwardly from the slideway (35) to penetrate the guide (11) along the axial extent thereof.

Abstract: The device for supporting a cutting-tool is intended to be placed in a head for machining grooves in a cylindrical rod and mainly comprises a frusto-conical support member having an axial bore through which the cylindrical rod to be machined is capable of passing. The support member is placed within a frusto-conical recess of the machining head and provided with a cutting-tool recess having an opening which defines the profile of the cylindrical rod. The cutting-tool is clamped within its recess by means of a ring which is screwed into the support member and has a control front face for receiving the rod to be machined.

Abstract: A manufacturing tool for finishing a preformed scroll for use in a scroll type fluid displacement apparatus is disclosed. The tool includes a working member having an end plate and a first involute element extending from one end surface of said end plate. A cutting edge extends along the inner side wall of an axial end of the first involute, and the end plate has a plurality of arc shaped holes along the outer side wall of the first involute element. A second involute element is rotatably coupled to the working member and interfits with the first involute element in a disposition to define a radial gap between the first and second involute elements. A cutting edge extends along the outer side wall of a first axial end of the second involute. A plurality of pins project axially from the other axial end of the second involute element and penetrate through the arc shaped holes. A rotatable member has a plurality of holes extending in the axial direction.

Abstract: A tool for forming striations (shallow grooves) in a cylindrical dowel which includes a block having a dowel hole, and crested edges, such as screw threads, extending into the hole such that when a dowel is driven through the hole, it will be provided with surface grooves on one or both sides to provide glue release passages and a tight dowel joint.

Abstract: The key seat slotter has a shank on which a pulley is adapted to be clamped. A broaching blade is slidable in a groove on the shank through the bore of the pulley. The key seat is cut in the pulley bore by manually pivoting a handle to effect repeated strokes of the broaching blade. The depth of the cut is progressively increased to the desired depth of the slot between successive strokes of the blade by incremental advancement of a tapered feed bar in the groove on the shank on which the broaching blade is slidably mounted.