Abstract: A polishing device for a welding tip includes a cylindrical holder; and a polishing unit. The polishing unit includes a blade configured to polish a welding tip. The blade polishes the welding tip due to rotation of the polishing unit. The holder includes a groove extending along an entire inner circumference of the holder. The groove includes axial groove portions each of which extends along an axis of the holder, and inclined groove portions each of which extends for a specified first distance and is inclined in one direction with respect to the axial groove portions. The axial groove portions and the inclined groove portions are alternately arranged. The polishing unit includes projected portions each of which extends to an inside of the groove, and the number of the projected portions is two or more and is equal to or less than the number of the axial groove portions.

Abstract: An in situ fan case rub strip machining tool mounts to a LPT/fan rotor shaft assembly of a gas turbine engine. After a fan is removed therefrom such that the machining tool is rotatable about an engine axis of rotation in conjunction with rotation of the LPT/fan rotor shaft assembly. The machining tool permits machining of a rub strip within the fan case of the gas turbine engine without disassembly of the fan case from the core engine as heretofore required. As the machining tool is mounted to the LPT/fan rotor shaft assembly, the cutting tool is accurately locatable relative the engine axis of rotation such that the rub strip is evenly and precisely machined to be concentric with the engine axis to assure proper fan blade tip to rub strip interface.

Abstract: One embodiment includes an electrode dressing apparatus having a rotatable dressing blade including a first cutting face, an electrode comprising an electrode body and a weld face, and an electrode guide positioned absolutely relative to the rotatable dressing blade to position the weld face of the electrode at a designated location over the first cutting face.

Abstract: A knife (1) for machining spot welding electrodes (2) includes one or more cutting edges (3) for machining the spot welding electrodes (2) and one or more diverting devices (7) for diverting removed spot welding electrode material that occurs during the cutting process away from the area of the knife (1). The knife (1) has a cutting edge (3) and an associated diversion device (7). The cutting edge (3) and the associated diversion device (7) are formed in one piece. The knife (1) can be a component of an electrode cutting tool. A cap cutter that includes the knife (1) and/or the electrode cutting tool is also disclosed.

Abstract: A power tool for trimming soft materials has a power driver with a drive train engaged with a cylindrical cutter body wherein the power driver rotates the cutter body about its longitudinal axis. A plurality of mutually spaced apart cutter teeth are fixed to an exterior surface of the cutter body. The cutter teeth each have a top surface and a sidewall surface, the sidewall surface extensive between the top surface and an exterior surface of the cutter body. The top surface of each of the cutter teeth is a four-sided convex polygon and the sidewall surface includes four mutually discrete surfaces corresponding to the sides of the polygon, with each of said discrete surfaces extending between the top surface and the cutter body.

Abstract: A laser weld cutter assembly that includes a right angle driver comprising: a motor contained within a motor housing; a handle assembly; a burr; and a cutting guide assembly comprising a support element attached to the motor housing, a base plate assembly pivotally attached to the support element, a cutting depth adjustment screw engaged with the base plate assembly and the support element, and a guard attached to the base plate assembly; and wherein the operator positions the output shaft assembly perpendicular to the direction of the weld to be cut, and moves the laser weld cutter assembly in a forward direction away from the operator, the rotation of the burr in the clockwise direction undercutting the material to be removed and providing ease in guiding the burr along the laser weld to be removed.

Abstract: A tip shaping apparatus presses electrode tips against a shaping roller thereof held by a rotationally driven holder in such a manner as to bring tip sections of the tips close to each other, thereby shaping the tip sections into reusable condition. The tip shaping apparatus includes deburring sections located in such positions as to confront burrs that are formed during shaping in such a manner as to project from outer circumferences of root sections proximate the tip sections of the electrode tips in a direction perpendicular to the axes of the electrode tips, at ejection of the electrode tips from the apparatus. Each of the deburring sections is located proximate an outer circumferential plane of the root section of each of the electrode tips undergoing shaping so as to abut against and cut off or bend the burrs in such a manner as to suppress the projecting height of the burrs when the electrode tips are ejected from the tip shaping apparatus.

Abstract: A method for producing a consumable electrode for remelting and an end face cutter for use in the method in which an ingot made in a consumable electrode arc remelting process is used as a material for the consumable electrode, are characterized in that said ingot can be set so that its centerline axis in a longitudinal direction lies horizontally and an end face of said ingot is machined by milling to be flat, the end face being connected with a stub, the stub holding the consumable electrode. In melting the consumable electrode, the present invention makes it easier to machine the bottom face of ingot that is to be mounted onto the stub or to perform conditioning such as cleaning the surface, which results in cutting man-hours and processing steps required for those operations and improving a product yield, thus enabling it to be widely used as a method for producing an ingot by the VAR process and contributing to the development of the relevant technology.

Abstract: An apparatus having a mounting body, a support having a first end and a second end. The first end of the support being pivotally secured to the mounting body for pivotal movement about a substantially horizontal primary pivot axis. A rail grooming head mounted to the second end of the support.

Abstract: An electrode tip dresser is disclosed which can dress a pair of electrode tips to a usable state while achieving a desired accuracy of a tip surface of each electrode tip including an angular portion at a peripheral edge of the tip surface, without separating each electrode tip from a welding gun. The electrode tip dresser includes a holder which is rotatable about a common axis of electrode tips, a pair of support shafts which are held by the holder, are arranged in parallel in an approach direction of the electrode tips, and extend in a direction orthogonal to the approach direction, and a pair of dressing rollers which are rotatably supported by the support shafts, respectively, to dress the electrode tips to a usable state.

Abstract: An apparatus having a mounting body, a support having a first end and a second end. The first end of the support being pivotally secured to the mounting body for pivotal movement about a substantially horizontal primary pivot axis. A rail grooming head mounted to the second end of the support.

Abstract: The invention relates to a rim and to a method for its production, in particular for bicycles, using a machining device for the working a welding burr of the rim. The machining device comprises a machining means working the outer contour of the rim and a another machining means working the inner contour of the rim, that has an outer diameter being less than the width of the rim well. The main steps of the method include movement of the first means along the outer contour of the rim to work the welding burr on the outer contour and movement of the second means along the inner contour of the rim to work the welding burr on the inner contour. During machining the inner contour the rim is pivoted around an axis by a predefined angular range.

Abstract: The invention provides a shape member manufacturing apparatus and a shape member manufacturing method which aims at cutting and grinding a joint projection 8B formed when a plurality of shape members are joined together by welding or friction stir welding, in a short time with high accuracy. A plurality of mounts 11 having a side structure 8 placed thereon are arranged in the longitudinal direction of the side structure. A joint projection 8B of a welded portion or a friction stir welded joint is formed on the surface of the side structure 8 in its longitudinal direction. A carrier 100 travels in the longitudinal direction of the side structure 8. Columns 105 are installed in a girder 103 of the carrier, and a milling cutter device 80 and a grinding device 90 are installed in lower portions of the columns 105. A milling surface of a milling cutter 81 of the milling cutter device 80 has a circular-arc shape with a radius R.

Abstract: The invention relates to a rim and to a method for its production, in particular for bicycles, using a machining device for the working a welding burr of the rim. The machining device comprises a machining means working the outer contour of the rim and a another machining means working the inner contour of the rim, that has an outer diameter being less than the width of the rim well. The main steps of the method include movement of the first means along the outer contour of the rim to work the welding burr on the outer contour and movement of the second means along the inner contour of the rim to work the welding burr on the inner contour. During machining the inner contour the rim is pivoted around an axis by a predefined angular range.

Abstract: A surface compensating shaving apparatus (24) has been provided for removing a plurality of pins (12) from a surface of a pinmat (14). The apparatus (24) includes a rotary member (28) and a surface compensating member (32) that is fixedly coupled to the rotary member (28) in a rotational direction and slidably coupled to the rotary member (28) in an axial direction. The surface compensating member (32) has a plurality of cutting members (34) extending therefrom for cutting the pins (12). The surface compensating member (32) and the cutting members (34) are intended to move in the axial direction in response to the contour of the surface (26) of the pinmat (14). In this regard, the cutting members (34) can shear the pins (12) at the surface (26) of the pinmat (14).

Abstract: A machine for making a plurality of electrodes projecting from the front surface of a plate-like workpiece uniform in height, comprising a chuck table having a placing surface for placing the plate-like workpiece, which can be moved between a workpiece take-in/take-out area and a processing area, a chuck table moving unit for moving the chuck table between the workpiece take-in/take-out area and the processing area, a cutting unit having a cutting tool for cutting a plurality of electrodes projecting from the front surface of the plate-like workpiece arranged in the processing area and held on the chuck table to make them uniform in height, a cutting unit feed mechanism for moving the cutting unit in a direction perpendicular to the placing surface of the chuck table, a take-in means for carrying the plate-like workpiece before processing to the chuck table positioned in the workpiece take-in/take-out area; and a take-out means for taking out the plate-like workpiece after processing held on the chuck table p

Abstract: An apparatus for resurfacing a pair of guide plugs includes a turntable rotatably mounted on a frame having cutting tools Interacting with resurfaceable guide plugs mounted on a reciprocating slide assembly which includes a guide support block adapted for reciprocating motion with respect to the cutting tools. The block has a pair of saw guides selectively attached thereto so as to be parallel to each other so that parallelism is maintained during the resurfacing process.

Abstract: A tool for machining workpieces, having at least one cutting edge which is fastened to a main body of the tool. A respective deburring device removes the burrs produced by each cutting edge during machining. The deburring device is supported at the main body near the cutting edge and is movable by an actuatable piston between a retracted storage position in the tool body and an extended active position out of the tool body for deburring after surface machining.

Abstract: A planing device for removing weld beads on car sheet metal, which comprises a handle, a cylinder cover and a support frame; the front end of the support frame is mounted with a round milling cutter; the inner side of the round milling cutter is furnished with a guide frame for adjusting the height between the bottom surface of the guide frame and the surface a sheet metal; when the round milling cutter is rotated at a high speed, the weld beads on a car sheet metal will be planed off.

Abstract: The present invention relates to a novel cutting equipment, which automatically cuts hard plastic pipes produced from an extruder, having a table, an input V shape leading wheel, an input fixing clamp apparatus mechanism, a cutting mechanism, a bearing transmission mechanism, an output fixing clamp apparatus mechanism, a V shape leading plate, a leading wheel, a cuttings collector, and an electric control system, which are assembled to a novel means of a hard pipe cutting machine.

Abstract: A planing device for removing weld beads on car sheet metal, which comprises a handle, a cylinder cover and a support frame; the front end of the support frame is mounted with a round milling cutter; the inner side of the round milling cutter is furnished with a guide frame for adjusting the height between the bottom surface of the guide frame and the surface a sheet metal; when the round milling cutter is rotated at a high speed, the weld beads on a car sheet metal will be planed off.

Abstract: A deburrer machine for cutting burrs (2), which consists out of a rotating deburring body (3) and travelling carriage (6) is foreseen for application especially on longitudinally cut slabs in flow. For deburring the deburring pistons (4) perform a rotary movement around the deburring body axis (21), whereby they approach to the cutting burr (2) from the workpiece side. Therefore the rotation axis is arranged in a way that the deburring pistons (4) turn below the lower workpiece surface outside the workpiece (1) after having finished the deburring procedure in order to lift again against this lower surface. Inside the deburring body (3) is placed a pressure chamber (18) which effects the lifting of the deburring pistons (4). Thereby the air contained in the lower piston guidance (12) is displaced and then the throttled air is led-off via bores in the lower part of the deburring piston (4) in order to dampen the piston movement.

Abstract: In a burr removing method and apparatus of the present invention, a burr located at an edge of a steel piece is cut with a cutter by disposing the cutter such that the flank of the cutter is substantially in parallel with the surface of the steel piece on which the burr exists and the angle between the cutting edge of the cutter and the edge of the steel piece which the burr intersects is at least 45° and relatively moving the cutter toward the outside of the steel piece along the lengthwise direction of the burr; or by disposing the cutter such that the flank of the cutter is substantially in parallel with the surface of the steel piece on which the burr exists and the angle between the cutting edge of the cutter and the edge of the steel piece which the burr intersects is at least 90° and cutting the burr located at the edge of the steel piece by relatively moving the cutter perpendicularly to the lengthwise direction of the burr.

Abstract: A metal mold repair tool is provided for leveling the work surface of stamping dies used in metal forming operations. The repair tool includes a pair of guides disposed on opposite lateral sides of a rotary finisher to precisely position the finisher with respect to the work surface. The rotary finisher is preferably driven by a conventional drive motor. The finisher and guides are vertically displaceable relative to each other, such that the position of the finisher relative to the work surface can be adjusted as desired.

Abstract: A surface cutting apparatus for hot-rolled products cuts top and bottom surfaces of a hot-rolled steel product continuously or intermittently by passing the steel product between a pair of rotary drums (milling cutters) that rotate in a direction reverse to each other. The apparatus includes a disk having a larger diameter than that of the rotary drums at one or both ends of at least one of the rotary drums. The disk recognizes a gap between the rotary drums, allowing a zero adjustment to be made without excessively pressing the rotary drums. The measurement can be by a non-contact distance meter, eddy-current type sensor or other sensor.

Abstract: The machine for surface working of wood workpieces solves the problem of the quality wood workpieces working when passing over the working area of the working head, and when leaving it. The longitudinal central axis of the oblong static rotor, with therein fixed axes inserted and mounted, and front circular plates fixed onto it, is for the .alpha. angle staggered from the perpendicular to the front surface of the guiding plate in a way that the front circular plate is for the .beta. angle staggered from the guiding plate front surface. The .alpha. angle and the .beta. angle are preferentially of the same size, and their size changes inversely proportionally to the size of the outer diameter of the front circular plate, whereby the outer diameter of the rotor preferentially also represents its drive pulley at the same time.

Abstract: A surface cutting method for a hot-rolled steel product that includes a joint portion having a predetermined breaking strength includes a step of clamping the steel product between a pair of milling cutters that are arranged on top and bottom surfaces of the steel product, while the steel product is conveyed in a longitudinal running direction. The top and bottom surfaces of the steel product are subjected to cutting by rotating the milling cutters in a rotating direction. A cutting resistance applied to the milling cutters during the cutting is determined based on parameters including type of steel, width, thickness, surface temperature and conveying speed of the steel product, as well as circumferential speed and cutting depth of the milling cutters.

Abstract: Apparatus and method for refurbishing damaged belting. The apparatus includes a frame with a conveyor system. A mechanism is attached to the frame for removing a desired amount of the belting surface as the belting moves relative to the frame on the conveyor system.

Abstract: An apparatus for removing the dross ridges which are formed on the lower surface of a metal workpiece during torch cutting of the workpiece. The apparatus includes a support beam having generally flat upper and lower surfaces, and a cutting edge extending longitudinally along each of its four corners. The beam is positioned to extend across and below the workpiece path of travel, and the beam is rotatable between a neutral position wherein one of the upper and lower surfaces is just below the pass line of the workpiece, and opposite tilted positions in which one of the cutting edges engages and removes a dross ridge on the lower surface of the workpiece. Each of the cutting edges comprises a plurality of separately pivotable cutting blades, so that the cutting edge formed by the blades is able to closely conform to a non-linear surface contour of the workpiece.

Abstract: Apparatus and method for refurbishing damaged belting. The apparatus includes a frame with a conveyor system. A mechanism is attached to the frame for removing a desired amount of the belting surface as the belting moves relative to the frame on the conveyor system.

Abstract: The reprofiling installation includes, arranged below a railway carriage, a milling device consisting of two frames (8, 9) linked together. These frames (8, 9) of differing lengths and guided by the track, carry each one a milling unit (22, 24). The installation further includes track heating means (31) located in front of each milling unit (22, 24), means for cooling the tracks behind each milling unit, as well as units for measuring the deformation of the track.

Abstract: A cutter for use in an electrode tip dresser, which has a cutter holder for holding the cutter and dresses an electrode tip for a resistance welding apparatus, has a rising portion which has a cutting tooth for cutting a front peripheral portion of the electrode tip and a flat portion which faces a front end surface of the electrode tip. The flat portion has a single cutting tooth for cutting the front end surface of the electrode tip. The single cutting tooth extends from that central point of the cutter as and origin which coincides with an axis of rotation of the cutter holder towards a predetermined radial direction. An origin portion of the single cutting tooth further extends beyond the central point towards a direction which is opposite to the radial direction.

Abstract: A rotary stripper tool comprising a housing; a motor supported on the housing; a shaft supported in the housing; a cutter head supported on the shaft; a drive between the motor and the shaft for rotating the cutter head; guides on the shaft; a vacuum supported on the housing for removing dust and shavings from the work area; and hand supports for the tool.

Abstract: An apparatus (1) for work inside piping comprising an elongate clamping and/or moving unit (2) with a working attachment (8) at one end. The unit (2) is provided with two arrays of radially projectable feet (6, 7), suitably at either end thereof. The working attachment (8) includes radially projectable elements (22), all of which are adapted for being displaced to the same extent, and one array of feet (6) placed at the end of the unit (2) opposite the working attachment being adapted such that its feet are thrust out to the same extent. The unit (2) suitably comprises two parts (4, 5) which are mutually, reciprocally movable, there being an array of feet (6, 7) arranged in each part (4, 5).

Abstract: An apparatus for peeling a layer from a surface, including a nonplanar surface such as the hull of a ship, comprises a rotatable substantially cylindrical support with at least two peeling knives projecting from an outer surface thereof. An annular guiding element surrounds each end of the substantially cylindrical support, and these annular guiding elements have different diameters. Preferably, the peeling knives are spaced unequally around the circumference of the substantially cylindrical support.

Abstract: The invention relates to a machine for surface and thickness working of wood workpieces of any dimensions, in particular short and thin workpieces without rigid clamping of the workpiece, consisting of a machine housing, a movable working table, a two-part baseplate with circular cutout into which a face of a milling head provided with fixed and exchangeable cutting edges is inserted. In the head, there is a guide insert. An upper guide strip is disposed in exactly the same plane as the cutting edge apex on the milling head and also in the same plane as a stationary portion of the baseplate. At least two working spindles, set at predetermined angles, are provided. The workpiece slides on the two-part baseplate guided by two flank guide rails and an upper guide strip forming together a movement channel for the workpiece.

Abstract: A portable, hand-held machine for stripping hard surfaces such as fibreglass boat hulls which have suffered osmotic deterioration. The machine has a hose fed hydraulic motor for outdoor work and a cutter block fitted with rows of tungsten carbide teeth which exert a planing action. Individually adjustable stops control the depth of cut. Trickle feed water arrests dust and prevents clogging. Stripping rates of about 12 m.sup.2 /hr are sustainable.

Abstract: An apparatus is provided for removing scale from a hot rolled steel strip by rolls acting by grinding and/or milling so that these rolls are uniformly effective in all regions of the steel strip and an appropriate uniform removal of the scale layer occurs. This is attained when driven grinding rolls adjustable toward the surfaces of the steel strip are provided of which at least two opposing rolls are axially slidable in opposite directions and have inversely oriented S-shape contours. These contours complement each other completely flawlessly in one definite position of the grinding rolls. In one such position the rolls provide a uniform engagement on both sides of a steel strip with a nearly rectangular profile.

Abstract: The rolling mill for mechanical descaling of hot rolled steel is constructed according to the slidable roll process with reducing rolls so that a unform operation with different and/or changing shape steel strips can obtained. This is attained when the rolling mill has at least two rolls slidable in opposite directions whose body surfaces are constructed with S-shape contours positioned inversely to each other so that these contours compliment each other flawlessly in one certain axial relative position. When sliding the rolls in opposite directions in one case the contour is decreased in the center region of the steel strip and when slid in the opposite directions in the other case the contour is increased in the center region. Thus the rolls can be adjusted to fit a gently convex steel strip profile by axially sliding the rolls in opposite directions as also rolled strips with a thickness centrally reduced in comparison to that of the edge regions can by appropriate sliding of the rolls opposite each other.

Abstract: Device for the internal machining of a tube comprising a mobile assembly which can be located in the tube and having a first part with at least two centering bearings and two rotors, and a second part linked in radially sliding manner with the first part and having a machining tool able to machine the interior of the tube, one of the said rotors driving the machining tool via a transmission shaft and the other of the said rotors rotating said second part; as well as a fixed assembly arranged around the tube and having first and second magnetic devices, each establishing a rotary magnetic field able to rotate the two rotors and a third magnetic device establishing a rotary magnetic field able to displace the said second part radially with respect to the first part, while rotating in phase with the second part.

Abstract: An apparatus grinding a steel billet to remove surface cracks. The billet is advanced in the direction of it longitudinal axis while being rotated. The apparatus includes a grinding wheel mounted in a bearing in a movably mounted support member. In order to accurately and simply control the penetration depth of the grinding wheel, a stop member is mounted on the support member. In one embodiment, the stop member is a segment of a circle mounted eccentrically relative to the grinding wheel. In another embodiment, the stop member is a segment of a spiral mounted coaxially with the grinding wheel. The stop member engages the surface of the billet. Two arrangements are described for rotating the billet at an increased speed while grinding the edge regions.

Abstract: Methods and apparatus are disclosed for processing of steel billets or the like to remove surface defects. A material-removing device such as a grinding wheel is automatically controlled to initiate removal of material at points where defects have been detected and to continue removal of material as long as cracks or other defects continue to be detected. In certain disclosed embodiments, an inspection is performed using magnetic particle or other inspection equipment, the initial removal of material being controlled therefrom. Thereafter, material-removal is controlled from signals produced by a probe which is carried in the removal device or adjacent thereto. In other disclosed embodiments, a thin layer of material is removed to permit detection of defects by a probe, the material-removal being both initiated and continued under control of probe signals.

Abstract: An assembly capable of use in removing material from both ends of an elongated workpiece, such as a bar incorporates two similar pieces of apparatus of a known kind. Each apparatus has a cutter mounted at one end of a flexible drive and rotatable by a motor about its own axis to effect removal of the material; the cutter is supported in a universal mounting enabling the cutter to swing in a closed path about the axis of the cutter. The cutter is biased inwards towards the axis. The invention provides positioning means for moving the cutters aside into loading positions so that a finished workpiece can be removed laterally and a new one introduced laterally. The positioning means on each apparatus includes means for shifting the motor towards the universal mounting so as to cause the flexible drive to bow more markedly and move the cutter further from the axis, and a deflector for engaging the cutter-end of the flexible drive and moving it to its loading position.

Abstract: The present invention is directed to machining reforming apparatus for machining electrodes of a resistance welding device. The apparatus comprises a body having an insertion portion for receiving at least one electrode and at least one rotary cutter, the cutter having a cutter portion adapted to extend along a peripheral inclined surface on a front portion of an electrode. A receiving base member is positioned within the body on the axis of rotation of the rotary cutter, wherein the receiving base member is adapted to abut a front end surface of an electrode. The cutter portions are biased radially inward towards an electrode, the biasing device maintaining proper contact between the edge of the cutter and the electrode.

Abstract: A self-positioning scarfing apparatus includes a plurality of sensing wheels and scarfing tools, each sensing wheel and scarfing tool defining an operative set mounted on a common support and biased by a biasing device, such as a spring assembly or hydraulic cylinder, into engagement with an elongated weld on a workpiece. One operative set is mounted on each end of a yoke, which is in turn mounted for movement relative to the workpiece. In one embodiment, the yoke is mounted for pivotal movement with respect to the workpiece. In an alternate embodiment, a positioning wheel is mounted in the yoke for engagement with the workpiece, and the yoke is mounted for biased reciprocation to a hydraulic cylinder or spring assembly. Apparatus identical to that just described is positioned on the opposite side of the workpiece for scarfing the opposite side.

Abstract: Chamfering apparatus for simultaneously chamfering the I.D. and O.D. of tubular members including an internal cutter for chamfering the I.D. and an external cutter for simultaneously chamfering the O.D., the internal and external cutters being mounted self-adjustably to permit them to simultaneously engage the I.D. and O.D. of tubular members of different I.D.'s and O.D.'s up to a predetermined maximum I.D. and O.D. and to minimize the net torque imparted to the tubular members by such simultaneous chamfering.

Abstract: Spent nuclear fuel elements of spherical shape are stripped of their outer graphite shell surrounding the graphite matrix in which fuel particles are embedded by being admitted one by one to a work space between a rotary milling disk and an axially shiftable, but non-rotary, reaction disk. The radially ribbed stepped surfaces of low-pitched helical configuration allow the spherical body to shift its position several times per revolution as it rolls around between the disks under pressure from a spring acting on the axially movable disk. A spacing collar prevents the two disks from approaching closer than a minimum spacing sufficient to prevent more than the outer graphite shell to be worn away. By operating the work space with two or more spheres therein at the same time, a damaged or out-of-round fuel element can be ground to a spherical shape if at least one of the spheres in the work space is truly spherical. Pairs of disks may be operated together in coaxial alignment to provide a high throughput rate.

Abstract: A grinder is supported within a pipe, the support being arranged to adjust the movement of the head of the grinder radially and axially of the pipe axis to bear against internal cracks in the pipe wall.

Abstract: A welding bulge removing apparatus comprises a U-shaped carrier adapted to be placed by means of rollers on welded pipes at the weld bulge, and being provided with an arcuate guideway and a toothed segment. It also comprises a motor-operated carriage having a driving gear wheel and support rollers. Mounted on the carrier are cutting tool holders movable to and from the weld bulge. The gear wheel and the support rollers of the carriage are respectively brought into engagement with the toothed segment and the arcuate guide-way of the carrier. The carriage is adapted to be rigidly connected to a lifting mechanism of a vehicle used for raising and carrying the welding bulge removing apparatus, whereby rotation of the carrier is effected, while the carriage remains immobilized.

Abstract: A milling machine for milling a face of a metal workpiece has a cutter positioned to act on the face of a workpiece passed through the machine. A control means is employed to ensure that the depth of cut on the face remains at its preset value regardless of variations in thickness of the workpiece entering the machine.In a preferred arrangement, the machine has a pair of cutters positioned to act on opposed faces of the workpiece. The control means then ensures that the depth of cut on each face remains at its preset value.This is different from known machines in which the cutters are arranged to cut the faces so that the outgoing thickness of the workpiece remains the same regardless of variations in thickness of the workpiece entering the machine.