Abstract: A dental milling machine is provided with a tool which is guided in a chuck. A workpiece arm is mounted opposite the tool to be able to be moved at least in the direction of the spindle axis. With a control device it can be moved in relation to the workpiece, especially by means of a drive motor at the workpiece arm. The workpiece arm has an abutment element, whereby the control device moves the tool and the abutment element towards each other until they abut each other. The control device can be used to detect abutment of the abutment element with respect to the tool, in particular with respect to its tip, in particular by decelerating the (relative) movement of the tool and the abutment element towards each another, upon contact of the tool and the abutment element. This position may be signaled as a reference position and, especially may be stored.

Abstract: An automatic lathe includes a main spindle that rotates a workpiece about a shaft center, a cutting tool that processes the workpiece, a feeder that moves the cutting tool, an input receiver that receives inputs regarding an eccentric distance and a radius, and a controller that controls the movement by the feeder such as to set a virtual circle having a radius of the distance, to set an offset virtual circle having a center at a position where a center of the virtual circle is offset from the shaft center of the workpiece in the radial direction of the workpiece by the radius, and to move the cutting tool along an circumference of the offset virtual circle in relation to a rotation of the workpiece by the main spindle. A hole is processed, which has the radius at a position away from the shaft center by the distance.

Abstract: The invention relates to a groove cutting tool having: a body and a holder wherein the holder is slidably mounted in the body. The holder has a first end at which a blade is mounted and a second end, distal in a slidable direction of the holder, from the first end. A drive pinion, located towards the second end, is configured to be in rotational communication with the blade.

Abstract: An improved portable boring bar apparatus includes a small hydraulic motor and drive mechanism for rotating a cylindrical boring bar and axially advancing it in the cutting direction. The boring bar is received in a drive housing, and a support arm affixed to the drive housing includes a bearing for rotationally supporting the boring bar, and a mounting tongue that extends radially beyond the drive housing for attachment to a workpiece mounting arm. At set-up, the workpiece mounting arm is temporarily joined to a set-up support arm identical to the drive housing support arm, and the arms so joined are positioned such that the bearing of the set-up support arm is centered relative to a workpiece pilot hole. The workpiece mounting arm is tack-welded to the workpiece, and the drive housing support arm is joined to the workpiece mounting arm in place of the set-up support arm.

Abstract: A machine for boring spaced, axially-aligned surfaces of a part includes a frame and a boring apparatus associated with the frame. The boring apparatus is configured to bore at least one surface of the part and includes a boring bar associated with a cutting tool configured to rotate about a longitudinal axis of the boring bar. The machine further includes a mounting fixture associated with the frame configured to mount the part in a fixed relationship with respect to the frame. The machine also includes an alignment assembly including at least one pair of plates. At least one of the plates of the pair of plates is configured to pivot such that the longitudinal axis of the boring bar is aligned with an axis defined by the axially-aligned surfaces of the part.

Abstract: A machine for boring spaced, axially-aligned surfaces of a part includes a frame and a boring apparatus associated with the frame. The boring apparatus is configured to bore at least one surface of the part and includes a boring bar associated with a cutting tool configured to rotate about a longitudinal axis of the boring bar. The machine further includes a mounting fixture associated with the frame configured to mount the part in a fixed relationship with respect to the frame. The machine also includes an alignment assembly including at least one pair of plates. At least one of the plates of the pair of plates is configured to pivot such that the longitudinal axis of the boring bar is aligned with an axis defined by the axially-aligned surfaces of the part.

Abstract: A debeading tool capable of internally debeading butt-welded pipe made of PVC and similarly hard plastics has a work head that can be coupled to a distal end of a torque tube. The work head includes a motor carrying a cutter which is oriented at an angle, e.g., 12 degrees, to the interior pipe wall for cutting the weld bead as the tool is rotated inside the pipe. The work head cutter can be moved between an insertion/removal position away from the side wall and a cutting position against the bead on the side wall. A locator assembly that contacts the bead during insertion of the work head aids in positioning the cutter to straddle the weld bead. A pipe cleaner can be prepositioned in the pipe before butt-welding to be engaged upon removal of the work head to pull weld bead chips and fines from the pipe.

Abstract: A method for deburring and tool for use therein wherein workpiece-engaging portions of a cutter of the tool prevent the cutting of chamfers to hole edges of boreholes. The tool removes burrs from a drilling operation performed on a steering yoke. The yoke includes two boreholes on parallel legs that are drilled in line with one another. The boreholes must be burr-free with little or no chamfer. The cutter is spring-urged or loaded to pivot on a cylindrical shaft to expose cutting edges of the cutter after a predetermined amount of angular movement from a substantially vertical position. The workpiece-engaging portions prevent the cutter from digging in and cutting the chamfers. The cutter rotates into retracted positions within the shaft to allow the cutter to pass through the drilled boreholes so that the cutting edges of the cutter can deburr surfaces of the yoke at both sides of each of the legs.

Abstract: A boring head is disclosed in which a plurality of boring tools provide a plurality of simultaneous cuts to a workpiece. A tool holder supports the plurality of boring tools generally perpendicular to a bore axis, so as to increase the rate of a boring operation.

Abstract: A tool having a base body which carries cutters for machining bores in a workpiece, the cutters being arranged coaxially with one another. The base body further has at least one lifting element, with which the base body can be moved from an eccentric position in relation to an axis of the workpiece bores into a central position, in which the axis of the tool coincides with the axis of the workpiece bores.

Abstract: A process is proposed for chip-removing machining of bore surfaces spaced at a distance from one another in axial direction, particularly of crankshaft and/or camshaft bearing bores, in which at least one of the two outermost bore surfaces is machined to produce a bearing surface for the machining of additional bore surfaces, and a boring bar is inserted through one of the machined outermost bores into at least one bore lying between the outermost bore surfaces.

Abstract: There is disclosed a machine tool for machining bores having a large axial length and a boring tool especially suited for a machine tool of this kind in which a boring bar holding at least one tool lip is supported by a steady adapted to be connected to the boring bar 28 via a coupling 48. By the steady the radial excursion of the boring bar during the machining process is reduced to a minimum.

Abstract: A device for machining bores in a workpiece has a tool with a base member and cutting blades mounted on the base member for machining coaxial bores in the workpiece. At least one guide bearing for supporting the tool is provided. The at least one guide bearing has a guide bearing axis coaxial to the workpiece axis. The tool and the at least one guide bearing are shaped such that the tool is guided and centered in the machining position of the tool by the at least one guide bearing and is insertable and removable in a radial offset position from the bores and the at least one guide bearing.

Abstract: A method of repairing a diametral surface of a mold of the type used in manufacturing glass containers by an I.S. machine, after a repair procedure that causes or can cause an out-of-roundness condition in the diametral surface. The method, which is applicable to the frusto-conical baffle match surface of a parison mold and to a compound cylindrical and frusto-conical bottom plate engaging surface of a blow mold, involves positioning a mold set with its separable semi-circular molds in end to end contact and contacting the diametral surface to be repaired, while the mold set is stationary, with a rotating reaming tool the tips of the removable blades of which define a surface that is complemental to the surface to be repaired.

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

Abstract: There is disclosed a boring machine capable of achieving high processing precision and high processing efficiency. A table is mounted on a bed for reciprocal movement in right and left directions. A workpiece fixing device for fixing workpieces W of a semi-cylindrical shape is mounted on the bed. Cutting tools P and Q for cutting the workpieces W, a workpiece carry-in device and a workpiece carry-out device are provided on the table. The table is moved to a left side, and the workpieces W are placed on the workpiece carry-in means. Then, the table is moved to a right side to transfer the workpieces W to the workpiece fixing device. The table is again moved to the left side, so that each workpiece W is subjected to a boring processing by the cutting tools P and Q. The workpiece carry-out device receives the processed workpieces W, and then the workpieces W are unloaded from the boring machine by a workpiece unloading device, and are fed to a subsequent step.

Abstract: A method and machine for repairing overhead cam engine cylinder heads and the like. The method includes the steps of removing the caps from the bases of the bearing towers or housings, removing material from the legs of the caps to reduce their height, replacing the caps on the bases, and boring the resulting bearings to produce bearings of the proper diameter. The machine includes a device for machining a bearing cap and a device for boring the bearings. The device for boring the bearings has a boring bar that is supported only at opposite ends of the cylinder head. The bar does not sag or chatter because it is made of an extremely hard and dense material such as a dense tungsten alloy or a ceramic-coated metal.

Abstract: A method and machine for repairing overhead cam engine cylinder heads and the like. The method includes the steps of removing the caps from the bases of the bearing towers or housings, removing material from the legs of the caps to reduce their height, replacing the caps on the bases, and boring the resulting bearings to produce bearings of the proper diameter. The machine includes a device for machining a bearing cap and a device for boring the bearings. The device for boring the bearings has a boring bar that is supported only at opposite ends of the cylinder head. The bar does not sag or chatter because it is made of an extremely hard and dense material such as a dense tungsten alloy or a ceramic-coated metal.

Abstract: An improved tool and method for the machining (e.g., boring, cutting, grinding and the like) of a workpiece. The tool includes a body that can be connected in a cantilevered arrangement to a machine for rotating machining operations and has fluid distribution channels formed in the body in a predetermined arrangement. The tool also includes a machining surface and at least one bearing surface formed on the peripheral surface of the tool. Pressurized fluid is provided through the fluid distribution channels in use, which, enable creation of a fluid bearing between the tool and an opening in the workpiece which has been machined by the tool. In addition, the tool can also include additional fluid distribution openings for cooling and cleaning of machining surfaces.

Abstract: An improved support mechanism for supporting a boring bar at spaced locations along its length within a workpiece during a boring operation, the present support mechanism being particularly adaptable for precision in-line boring of the cam shaft bores associated with overhead cam cylinder heads such as the Ford Escort overhead cylinder head presently in use and being specifically directed to centrally supporting the boring bar intermediate the respective opposite end portions of the cylinder head or other workpiece, the present support mechanism including a first annular member slidably positionable on the boring bar at an intermediate location along its length, the annular member being constructed to enable the boring bar to rotate freely therein, a second member slidably positionable within any one of the lifter bores associated with the particular cylinder head or other workpiece to be re-bored, the second member including a locking mechanism for locking the second member within any one of the lifter bores

Abstract: A method and apparatus for machining the inside surface of the two halves of the hollow casing of a machine or the like with the two halves positioned and mated together to form the closed hollow casing thereby providing machined areas on the inside surface of the two halves which are symmetrical and in line. The apparatus comprises a support structure in the form of a boring bar extending through the closed housing. A pair of spaced bearings in the closed hollow casing rotatably support the boring bar. Positioning apparatus is operatively attached to the boring bar for rotating and axially positioning the boring bar within the closed hollow casing. Support assemblies are positioned within the closed hollow casing and are attached to the boring bar to move with the boring bar. Cutter devices are attached to the support assemblies and are movable in a radial direction with respect to the boring bar to machine the inside surface of the closed hollow casing.

Abstract: A method and apparatus for removing metal from a workpiece so as to form an incomplete hole therein is disclosed. The tool includes a shank having a plurality of cutting inserts adjustably attached to one end thereof. The cutting inserts are axially spaced apart from one another along the tool shank by a predetermined distance which is greater than the thickness of the workpiece. The first cutting insert functions as a drill or end mill to form a rough incomplete hole through the workpiece, while the second cutting insert functions as a boring tool to finish the incomplete hole. An opposite end of the tool shank is retained within a bore formed in a tool holder. The tool holder is supported within a conventional rotational means, such as a lathe. Both the opposite end of the tool shank and the bore formed in the tool holder are formed eccentrically to provide maximum flexibility in adjusting the rotational axis of the cutting inserts and, therefore, the diameter of the incomplete hole being formed.

Abstract: A device for removing a collar coaxially fixed to a projecting end of a fastener axially extending through the surface of a substrate, the device comprising a jig having opposed base and top surfaces and a cavity open at the base surface and disposed to coaxially receive the collar when the base surface is disposed on the substrate, at least one drill bit bushing extending through the jig on an axis generally parallel to and spaced a predetermined distance from the axis of the cavity, the bushing being disposed to guide a drill bit into engagement with the collar when disposed in the cavity, and an adjustable screw for controlling the axial length of drill bit extending through the bushing.

Abstract: Method for the non-destructive removal of tubes or of portions of tubes from heat exchangers, comprising:(a) the lengthwise cutting along at least one generatrix of one tube or of a plurality of tubes of said exchanger, to a depth at least equal to the thickness of the tube plate and to a width of up to 2% of the outer perimeter of the tubes;(b) the approaching to each other of the edges of the so-obtained cut section up to the complete release of the tube, or of the tubes, from the tube plate;(c) the possible crossways cutting of the tube, or of the tubes, to a height at least equal to double the thickness of the tube plate; and(d) the recovery of the tube, or of the tubes, by sliding same out of the said plate.

Abstract: Improved apparatus for threading a longitudinally divided partial hole in a machine component has a tap driving spindle selectively and reciprocally carried by a frame. On a base plate is a positioning means for holding the component in a predetermined relationship with the frame and locater means for accurately aligning the component with the tap driving spindle. A movable guide shoe that is operable in combination with the locater means opposes the partial hole to be threaded and forms temporarily an opposed partial hole that accurately guides the tap. Adjustment and retainer means are used for selective positioning of the guide shoe in relation to the tap guide hole.

Abstract: A portable cambearing line boring tool for an internal combustion engine with an aluminum head or a cast iron block with aluminum caps and an overhead camshaft with non-replaceable bearings that are cast in as an integral part of the cylinder head which utilizes a cutting bar formed with blind openings for receiving spring loaded cutters. Centering of the cutting bar is by the use of locating bushings selected to fit a plurality of different cam-oil-seal and/or oil-plug openings at either end of the cylinder head. The bushings remain in place during the line boring. Horizontal alignment is by alignment ears secured to the upper valve cover gasket surface. For long heads a center bar support is provided. Rotation of the bar is by a portable hand held drill.

Abstract: A boring apparatus and process comprising suspending a boring bar for boring a hole in a workpiece for universal pivotal movement in all directions. Then, the workpiece is brought below the boring bar with the axis of the hole being vertical. Thereafter, the boring bar is lowered and eccentrically passed through the hole in the workpiece and slidably and rotatably supported at least at two points thereof axially spaced apart. Then, the boring is effected by the rotation and axial relative movement of the boring bar with respect to the workpiece, with the axis of the boring bar aligned with the axis of the workpiece.

Abstract: Apparatus for machining a stop valve seat ring while the valve remains piped to a turbine comprises a pair of spiders with adjustable arms which fit within the valve and a shaft rotatably supported by the spiders and driven through a gear train by a motor attached to one of the spiders, the shaft having a tool support which holds and is capable of moving a single edge cutting tool axially to machine the seat ring.

Abstract: A portable boring machine for boring bearing housings in situ includes a pair of spaced apart mounting members for adjustably positioning a boring bar within a row of bearing housings. The spaced apart mounting members are removably positionable on the boring bar and permit rotation of the boring bar with respect to the housings. The mounting members include radially adjustable jaws which enable the space between the boring bar and an adjacent bearing housing to be adjusted by the user in order to adjust the position of the boring bar within the housing and to vary the inclination of the boring bar with respect to the row of housings to be reconditioned. In this way the user has complete control between the relative positions of the boring bar and the bedplate. Moreover, since the support members are removably positionable on the boring bar they may be adjusted in position with respect to the particular housing to be bored.

Abstract: The invention relates to a drill jig assembly for use in the removing a tube from a wall structure. the device fits within the tube and defines drill guide grooves along its length such that, a rotating drill inserted into the guide grooves will cut away a portion of the wall thickness of the tube. When portions of the tubing wall thickness have been reduced, the tube may be readily inwardly collapsed so as to easily remove it from the wall structure.

Abstract: A machine for cutting insulation material into semicircular blocks. Circular cutting blades of different diameter and thickness are mounted reciprocally on a support shaft.

Abstract: An apparatus and method is provided for an air bearing support of a rotatable tooling bar, such as a boring bar. One or two mandrels may be provided for this tooling bar to form a complete mandrel assembly with the tooling bar. An air pressure expansible collet is provided on each mandrel so that each may be clamped within a clamping aperture, such as an aperture on the workpiece itself. Air under pressure is supplied to the two mandrels simultaneously to accomplish, first, an air bearing centering of each mandrel around the tooling bar as a guide; second, an expansion of the collet on each mandrel for clamping of each mandrel within the clamping apertures; and, third, provision of an air bearing support and centering of the tooling bar within the two mandrels during machining for precise machining of the workpiece by the continued air supply.

Abstract: An apparatus for machining a workpiece to a predetermined contour in accordance with a reference pattern comprises a cam mechanism which defines the reference pattern. The cam mechanism is mounted on a carrier assembly, on which is mounted a rotary workpiece holder for positioning a workpiece in relation to a machining tool. The cam mechanism is coupled to the workpiece holder by drive means and is driven so as to impart an oscillatory pivotal movement to the workpiece holder while rotating the workpiece holder, thereby effecting a predetermined pattern of movement of the workpiece in relation to the tool.

Abstract: A machine for cutting insulation material into semi-circular blocks. Circular cutting blades are mounted reciprocally on a support shaft. A router functions to cut a groove in the insulation material to provide clearance for the cutting blade support shaft.

Abstract: A tool for use in the line boring of diesel engine cylinder blocks. The tool includes a mounting pad having a pair of holes for fitting over dowel pins projecting from the end of the cylinder block. A central opening of the pad is then centered in alignment with the bores of the engine block to receive a bearing providing rotative support for a shaft. The shaft extends through the center of each bore to permit accurate cutting of damaged bore areas with a cutting tool on the shaft. The bearing can be adjusted in limited fashion by an adjustment mechanism on the pad to assure that the shaft is centered in any undamaged bores that are present. An adapter plate permits mounting of the pad on engine blocks having locating openings instead of dowel pins.

Abstract: A pipe coupling, which renders it possible to connect branch pipes (24) to a feed-pipe (1) without requiring the flow in the feed-pipe to be shut off. In a cylindrical guide passageway (5) of one of two coupling parts (2a,2b) embracing the feed-pipe a piston (4) is located, which is provided with a passageway (10) for fluid connection between the feed-pipe and the branch pipe. The piston is provided with an internal knife (9) which upon rotation of the piston cuts up material out of the feed pipe to form the opening to the passageway and projects the cut-up material into the guide passageway (5) to assist in anchoring the coupling in place.

Abstract: Apparatus for machining the planar side face of a piston ring having a cutting tool holder reciprocable with respect to the planar side faces of the piston rings in the axial direction thereof. A cutting tool is secured to the cutting tool holder so that it cuts the side face of the piston ring from the axial direction to reduce the amount of cutting depth of the undercut portion on the ring.

Abstract: A router is made from a carbide shaft or rod which has two sets of flutes, which preferably turn in the same direction and overlap each other in each and every circumference of the fluted part of the shaft. One set of flutes has a slow spiral and sharp cutting edges. The other set of flutes has a fast spiral and a clean out groove with a large cross section. The rod turns, for cutting, in a direction which drives chips, dust, and other debris downwardly where they are drawn off by a vacuum cleaner. The air draft of the vacuum cleaner passes through the flutes and cools the cutting edges.

Abstract: A grinding apparatus for forming and grinding complex curved surfaces such as the peritrochordal bore of rotary a combustion engine, e.g.

Abstract: A machine for cutting a tubular key from a tubular key blank. The tubular key blank is mounted on a stanchion and is rotatable in respect thereto. Also, the tubular key blank is movable a limited lineal distance in respect to the stanchion. A key ejector assembly is connected with the key blank supporting mechanism to manually eject the key after the key has been cut. A cutter is mounted on a mounting assembly which is lineally movable in two directions (perpendicular to each other) in respect to the base. Measurement means in the form of a plurality of dial indicators are mounted between the base and the mounting assembly to accurately ascertain the extent of movement of the mounting assembly in respect to the tubular key blank. A decoder mechanism is mounted on the base which is to be used to measure the length of grooves already cut within a tubular key permitting that key to be duplicated within the tubular key blank mounted within the key supporting structure.

Abstract: A machine for cutting insulation material into semi-circular blocks. Circular cutting blades are mounted reciprocally on a support shaft. A router functions to cut a groove in the insulation material to provide clearance for the cutting blade support shaft.

Abstract: An align boring machine for boring bearing housings of an automotive engine block wherein a boring bar is rotatably suspended by and rotatably driven between two columns positioned upon machine ways, and the engine block is mounted for aligned movement along said ways.

Abstract: Apparatus for recapping tires, particularly of the type used on off-the-road vehicles. Rubber strips are applied to the prepared tread surface of the tire to "smooth" the tire, after which the tire is disposed on a roller assembly to cut i.e., "groove" a tread design in the tire. The roller assembly is hydraulically displaced to dispose the tire in a pit and is rotated for indexing the tire to groove the circumference thereof. A grooving blade is heated to a controlled temperature and is hydraulically pulled across the tread surface to cut the tread grooves.

Abstract: An align boring machine for boring bearing housings of an automotive engine block wherein a boring bar is rotably suspended by and rotably driven between two columns positioned upon machine ways, and the engine block is mounted for aligned movement along said ways.

Abstract: A system for notching tubes to facilitate their joinder to other tubes or rods, in which a first portion of the notch is formed by a rotary cutting action extending progressively inwardly into the tube side wall and then outwardly in an arcuate path, and the second portion of the notch is formed by a plunging, shearing action which simultaneously punches the entire second portion of the notch out of the wall of the tube. The apparatus for forming each of the notches preferably includes a pair of die halves which together define a tube receiving passage intersected by a tool receiving passage, and a cutting tool positioned in the tool receiving passage. The tool is provided with a substantially axially extending rotary cutting edge for forming the first portion of the notch and a shearing edge for punching out the second portion of the notch when the tool is plunged through the wall of a tube positioned in the intersection of the tube and tool receiving passages.

Abstract: A milling head having a shaft for attachment to a machine tool, and at least one cutting insert or bit, characterized in that the cutting insert is supported in a tiltable or swivelable holder having a swivel axis extending perpendicularly to the axis of rotation of the milling head. Stopping means is situated between the milling head and the holder, against which the holder rests in its working position. A cam plate is held in a stationary position such that the cam plate cooperates with the holder to tilt or swivel the latter along a portion of its arcuate movement thereby lifting the cutting insert off the surface to be machined. The stopping means may include travel limit elements that comprise a bore in the holder and a protruding pin which engages with the bore. Biasing means is provided in the form of a spring arranged so that it tends to bias the holder into its working position.

Abstract: As part of the process of realigning the distal ends of a bone having an intermediate section of width W, an arcuate osteotomy is performed on the intermediate section using a cutter having an arcuate cutting edge of a diameter slightly greater than W and an arcuate extent of 180.degree.-N.degree.. The blade is oscillated through an arc of approximately N.degree. to form a crescentic joint having a maximum bearing area.

Abstract: A method of forming a groove in an essentially planar face of a metal object, the groove being uniformly curved on an arc of radius "r", and being of a width "w" and a constant depth "d". Such grooves must be formed, for example, to receive the end face seals of the piston of a rotary engine of the trochoidal type. The groove is cut with a broach which is uniformly curved on an arc of said radius "r", by producing relative motion of the broach and the object about an axis which is the center of a circle of said radius "r", in such manner that the teeth of the broach cut the groove.

Abstract: Methodwise this disclosure relates to the manufacture of workpieces having polygonal inner or outer contours based upon radii of predetermined inner and outer circles with n being the number of angles of the desired polygon, the method including the steps of rotating a workpiece about its axis, moving the tool along an ellipsoidal path while in contact with the rotating workpiece with tool travel along the ellipsoidal path having velocity varying generally sinusoidally as a function of tool location, said ellipsoidal paht is radially offset from the workpiece axis of rotation and its width generally corresponds to the difference between said inner and outer radii, and rotating the workpiece about its axis for a duration of time longer than the duration of movement of the tool along the ellipsoidal path by said factor n.

Abstract: An align boring machine for boring .Iadd.a plurality of generally aligned .Iaddend.bearing .[.housings.]. .Iadd.units .Iaddend.of an automotive engine .[.block.]. wherein a boring bar is rotatably suspended by and rotatably driven between two columns positioned upon machine ways, and the engine .[.block.]. .Iadd.unit having the bearing units .Iaddend.is mounted for aligned movement along said ways.