Abstract: A battery pack mounting system includes, among other things, a bracket having a first connection flange configured to connect to a vehicle structure, a second connection flange configured to connect to a battery pack, and a spanner portion spanning from the first connection flange to the second connection flange. The bracket includes one or more openings that segment the bracket into at least a first section and a second section. Each of the openings extends into both the spanner portion and the first connection flange.

Abstract: An air intake of an air handling or HVAC system, such as located in a ceiling of a structure, includes a movable filter housing. The filter housing comprises a grate configured to support one or more air filters at a top side thereof. The filter housing is mounted via one or more extendable connectors and includes a control tool mount. Connection of a control tool to the filter housing allows a user to pull the filter housing downwardly to a lowered position for replacing the air filter(s). The filter housing may be biased upwardly to its use position and may include a latch or lock to secure it in the use position.

Abstract: A hole expansion device includes a cutting portion main, body formed to have a diameter for the cutting portion, main body to be housed within a joint hole and including a cutting blade tool movable in a range from a housed position at which a blade is housed within a diameter for the cutting portion main body to an extended position at which the blade projects out of the diameter, an advancing and retracting member that is constructed to move in an axial direction by an external force and rotate about an axis of the advancing and retracting member, and a link mechanism that converts an advancing and retracting movement of the advancing and retracting member into a rotational movement of the cutting blade tool.

Abstract: A hand held flaring tool includes a receiving portion for receiving an end of a tube, a stop element, a locking mechanism and a flaring mechanism. The stop element is movably disposed at the receiving portion and is movable between a stopping position, where the stop element limits insertion of the tube at the receiving portion to set the tube at an appropriate location for flaring the end of the tube, and a flaring position, where the stop element is moved to a position remote from the end of the tube. The locking mechanism is operable to lock the tube at the receiving portion when the tube is inserted into engagement with the stop element. The flaring mechanism is operable to move a flaring mandrel towards and into engagement with the end of the tube to flare the end of the tube.

Abstract: A floating chuck assembly used in connection with a workpiece support carrying a workpiece, the floating chuck assembly comprising a chuck assembly; a linkage assembly adapted to support the chuck assembly, the linkage assembly including a mounting link attachable to the chuck assembly, a first link having a first end pivotally attached to a support about a first support axis and having a second end pivotally attached to the mounting link about a first mounting axis, a second link having a first end pivotally attached to the support about a second support axis and a second end pivotally attached to the mounting link about a second mounting axis; and, an extendable support having a first portion attached to the support and a second portion attached to one of the mounting link, first link, and second link, wherein the first portion moves relative to the second portion.

Abstract: A wind turbine installation comprises anchor bolts having a sheath or sleeve which extends above the cement foundation and the overlying grout layer. If desired, the sleeve may partially extend inside the base flange of the wind turbine tower. The sleeve may be manufactured from polypropylene, polyethylene or other materials having satisfactory mechanical properties, primarily that the material be capable of withstanding sufficient plastic deformation to cause the material to conform to the shape of the threads of the anchor bolts without the material failing. This swaging operation results in a crimped end which forms an interference fit with the threads of the anchor bolt thereby preventing or limiting the intrusion of water or other liquids into the bolt-sleeve annulus during the installation of the turbine foundation.

Abstract: A micro-concave portion machining method is provided for forming micro-concave portions on an inner circumferential surface of a cylindrical bore form in a workpiece. The micro-concave portion machining method includes performing mirror surface machining and subsequent plastic working on the inner circumferential surface. The plastic working on the inner circumferential surface forms a plurality of recesses with each of the recesses including a micro-concave portion.

Abstract: A shaping tool as depicted in exemplary FIG. 3 comprising a rotatable base member having at least one profiled bending roller (13) which is mounted on a circular track and is rotatable about a rotation axis. The bending roller (13) arranged on a radially movable slide (11) is movable from a position defining a maximum working aperture for the tool, by means of a spring-loaded lever (9) which has an axial configuration, into a position defining a minimum working aperture for the tool.

Abstract: A metallic container end closure is provided which includes a channel or groove in a predetermined location in at least one of an inner panel wall, outer panel wall, or chuckwall, and which is formed by a shaping tool. An apparatus and method for spin-forming the end closure with the improved geometry is also provided herein.

Abstract: An apparatus for forming microscopic recesses on a circumferential surface that defines a cylindrical bore in a workpiece, the apparatus including a form roller, a form roller drive driving the form roller to rotate about a rotation axis in an axially offset position in which the rotation axis is offset from a central axis of the cylindrical bore, an axial drive causing a relative axial movement of the workpiece and the form roller drive along the central axis of the cylindrical bore, and a rotary drive driving at least one of the workpiece and the form roller drive to rotate about the central axis of the cylindrical bore while keeping an outer peripheral surface of the form roller pressing against the circumferential surface that defines a cylindrical bore.

Abstract: A pipe expanding device inserts a pipe expanding punch into an opening end portion of a steel pipe with a special shape in the state where the opening end portion of the steel pipe with a special shape is pressed in an insertion direction of the punch.

Abstract: An improved tool assembly for enhancing the surface of a heat transfer tube is provided. The tool assembly includes rods having cutting tips and positioned in rod guides which are slidably positioned in shafts provided in a tool holder. In an equilibrium state, the cutting tips do not extend from the tool holder. When a force is applied to the rod guides, the rod guides move in a first direction along the shafts in the tool holder, resulting in exposure of the cutting tips which enhance the tube surface. When the force is removed from the rod guides, the rod guides move along the shafts in a direction opposite the first direction to retract the cutting tips within the tool holder. In this way, the cutting tips are protected when not in use.

Abstract: A roller tool for forming circumferential grooves around a pipe is disclosed. The tool is rotatable about an axis of rotation and has a circumferential surface engageable with a pipe. The tool surface includes first and second surface portions positioned in spaced relation and oriented perpendicularly to the axis of rotation. A radial surface portion extends between the first and second surface portions and is oriented substantially parallel to the axis of rotation. An angled surface portion is positioned adjacent to the second surface portion. The angled surface portion is oriented at an angle up to about 70° and slopes away from the second surface portion.

Abstract: A method of expanding a diameter of a tube includes the steps of positioning the tube with one end abutting a stop member, extending a mandrel through an interior passageway of the tube, and expanding a diameter of an expandable head connected to the mandrel as the mandrel is moved in a direction toward the stop member. The diameter of the tube expands in correspondence with the expansion of the diameter of the mandrel. A longitudinal axial force is applied to the tube in a direction toward the stop member as the expandable head expands the diameter of the tube.

Abstract: A reforming assembly for simultaneously reforming and reprofiling a bottom portion of a metallic container is provided. The reforming assembly generally includes a roller block having a pair of reform rollers and two pairs of outside reprofile rollers. A biasing means is operably interconnected to the reform rollers, such that the reform rollers extend to contact the inner surface of the bottom portion of the container when contacted by the bottom portion of the container. The outside reprofile rollers engage with an outer surface of the bottom portion of the container. The container reforming assembly is rotated, while maintaining the container body in a static non-rotating position, to create an internal can profile on the inner surface by the pair of reform rollers, and an external can profile on the outer surface by the outside reprofile rollers.

Abstract: An apparatus and method for forming grooves in a pipe for receiving mechanical pipe clamps are disclosed. The apparatus includes a holding fixture for securing the pipe and a carriage rotatably mounted on the holding fixture. Two arms are pivotably mounted on the carriage and extend on opposite sides of the pipe. Each arm has a grooving roller rotatably mounted thereon. An actuator connects the arms and forces the grooving rollers into engagement with the pipe. The carriage, arms, actuator and grooving rollers are rotated about the pipe in an orbit to form the circumferential groove. The method steps include forcing the grooving roller into the surface of the pipe at a fixed rate per revolution of the grooving rollers about the pipe in the orbit.

Abstract: A tool for preparing pipes for coupling using mechanical couplings is disclosed. The tool has a movable roller pivotally attached to a body, a tapered roller rotatably attached to the body and a plurality of tool rollers rotatably mounted on a carriage slidable within the body. Each tool roller has a chamfering flange, a grooving flange and a textured, surface for chamfering the pipe end, forming a groove in the pipe end and marking the pipe end. The carriage is movable to position a tool roller at a predetermined distance from the pipe centerline. The tapered roller and the movable roller support the pipe end at an equiangular spacing from the tool roller. The movable roller is actuated by a jackscrew to forcibly engage the tool roller with the pipe end as the tool is rotated about the pipe end circumference to form the chamfer, the groove and an insertion depth mark.

Abstract: A reforming assembly for simultaneously reforming and reprofiling a bottom portion of a metallic container is provided. The reforming assembly generally includes a roller block having a pair of reform rollers and two pairs of outside reprofile rollers. A biasing means is operably interconnected to the reform rollers, such that the reform rollers extend to contact the inner surface of the bottom portion of the container when contacted by the bottom portion of the container. The outside reprofile rollers engage with an outer surface of the bottom portion of the container. The container reforming assembly is rotated, while maintaining the container body in a static non-rotating position, to create an internal can profile on the inner surface by the pair of reform rollers, and an external can profile on the outer surface by the outside reprofile rollers.

Abstract: A reforming assembly for simultaneously reforming and reprofiling a bottom portion of a metallic container is provided. The reforming assembly generally includes a roller block having a pair of reform rollers and two pairs of outside reprofile rollers. A biasing means is operably interconnected to the reform rollers, such that the reform rollers extend to contact the inner surface of the bottom portion of the container when contacted by the bottom portion of the container. The outside reprofile rollers engage with an outer surface of the bottom portion of the container. The container reforming assembly is rotated, while maintaining the container body in a static non-rotating position, to create an internal can profile on the inner surface by the pair of reform rollers, and an external can profile on the outer surface by the outside reprofile rollers.

Abstract: A process for the manufacture of a tube blank, comprising the following steps:

Abstract: A device for preparing pipe segments for joining with mechanical pipe fittings in a piping network is disclosed. The device has a fixed support with support surfaces engageable with the pipe segment, and a movable support, facing the fixed support, on which tools, such as grooving rolls, chamfering rolls, marking rolls and cutting blades are rotatably mounted. The tools engage the outer surface of the pipe to form a circumferential groove, a marking pattern, a chamfer or a cut through the pipe when the movable support is moved toward the fixed support. A collar or cup having a circumferential side wall sized to receive the pipe is mounted on the fixed support adjacent to the support surfaces and radially reinforces the pipe to prevent it from collapsing or going out of round during groove formation.

Abstract: A method of forming a profile (10) in a section of tubing (12) comprises: providing an expander device (14) having at least one radially extendable expander member (22); positioning the device (14) at a predetermined location in the tubing (12); and extending the member (22) to deform the tubing (12) to create a profile (10).

Abstract: The planarity of a strip, especially metal strip is measured in a measurement zone in which the tension of the strip has been reduced in a targeted way by braking the strip. The braking force should be practically equal to the strip tension.

Abstract: A die assembly includes spinning pilot rollers for necking-in the open end of a container. The die assembly includes a cylindrical die for engaging the outside surface of a container. A tubular spindle is rotatably mounted along the axis of the die. One or more of rollers are rotatably mounted on the spindle, and each roller is pivotable about an axis which extends parallel to the axis of the die. An actuator is reciprocably mounted within the spindle and is movable between first and second positions for camming the rollers away from the axis of the spindle and toward the inside surface of the die.

Abstract: A tool for expanding a tube into engagement with a wall of a hole in a plate and simultaneously forming a flange on the end of the tube has a mandrel having a tapered distal portion. The mandrel receives for rotation and axial displacement a tubular cage. The cage carries expanding rolls, each of which is supported for rotation in a slot in a distal portion of the cage, is displaceable radially, is in rolling engagement with the tapered portion of the mandrel and the tube when the tool is in operation, and is skewed at a small angle to the mandrel axis so as to impart traction to the cage and the mandrel and draw them distally into the cage upon rotation of the mandrel.

Abstract: A branch pipe is formed on a metal tube using a forming tool including a milling part and a burring part adjacent the milling part. The milling part has a first diameter and is provided with a prescribed cutting edge on its outer peripheral surface. The burring part has a sloping surface with a maximum second diameter larger than the first diameter, and has a slope diameter that gradually diminishes in a direction away from the milling part. The branch pipe forming tool can be used for forming a branch pipe on a metal tube regardless of the shape of the metal tube.

Abstract: An apparatus for guiding hot-rolled strips through an inductor, arranged between two adjacent roll stands, of an induction heating device, in particular within a finishing mill behind a strip-casting installation or thin-slab casting installation. The apparatus guides the strip between the roll stands under controlled tension over at least two guide rollers arranged on both sides of the inductor in a plane of travel of the strip which extends centrally through the inductor space between the induction coils. A tension-measurement roller is provided for regulating the tension of the strip and is arranged in front of the inductor and the first guide roller.

Abstract: The invention relates to a control process for a roll stand consisting of a pair of work rolls, a pair of backup rolls, and optionally a pair of intermediary rolls. The controls for a rolling force, a deflecting force, and optionally a roll shift are given specified values, which are obtained on-line in a roll stand model with a roll deflection model. According to the invention, relationships between the rolling force, the deflecting force, and the roll shift, on the one hand, and a corresponding roll gap variation on the other hand are determined on line in the roll deflection model at interpolation points. These relationships are used to calculate at the interpolation points set points for the rolling force, the deflecting force, and the roll shift.

Abstract: A device is indicated for flanging the end of a metal tube to achieve a circumferential surface extending outward at right angles from the tube. It has the form of a cylindrical housing with a flange at its open end for fastening a clamping tool which is fastened to the tube, and its other end is closed by a bottom part. The housing has a flanging attachment that is able to rotate around the longitudinal axis of the housing, and a hand-wheel which is attached to a connecting element and extends outward through the bottom part. The hand-wheel is rigidly linked to a guide part of the flanging attachment by a threaded rod which fits through a suitably threaded bore in the bottom of the housing. A pressure element of the flanging attachment is guided by a pin which also forms part of the flanging attachment. The pressure element is operationally attached to the guide part so that it is able to rotate with it around the longitudinal axis of the housing.

Abstract: A system and method for achieving an optimum interstand strip tension providing substantially equal loading of adjacent stands of a tandem rolling mill where such optimum tension is determined by the expression ##EQU1## where A1 and B1 are, respectively, the load ratio intercept and the slope of the load ratio versus interstand tension function for a first mill rolling stand, and A2 and B2 are, respectively, the load ratio intercept and the slope of the load ratio versus interstand tension function for an adjacent second mill rolling stand, and whereby the rolling capacity of the mill is substantially fully utilized.

Abstract: A process for the cold rolling of a metal strip between rollers of rolling stands arranged sequentially is provided, along with a plant for its implementation, wherein the process involves:analyzing, as a function of frequency, a signal from an inter-stand tension measurement sensor corresponding to a level of tension of the metal strip to determine periodic variations in the signal having frequencies corresponding to a speed of rotation of the pair of rollers in a downstream rolling stand and proportional to out-of-roundness defects present in the rollers of the downstream rolling stand; andcompensating for the out-of-roundness defects in the rollers in the downstream rolling stand by adjusting the clamping setting of the rollers in the downstream rolling stand in accordance with a compensation signal, produced by the means for compensating, that is proportional to the periodic variations.

Abstract: A method of controlling and maintaining a drawing force applied to a length of rolled stock between two-spaced apart rolling units includes the steps of determining the value of at least one of a frequency and an amplitude of a transversed vibration of the rolled stock between the drawing units, correlation of the determined value to a corresponding value of drawing force, comparison of the correlated value of the drawing force to a reference value, and adjustment of the drawing force to maintain it at a substantially constant selected value. In another aspect of the invention an apparatus is provided which includes elements for measuring at least one of a frequency and an amplitude of a traversed vibration experienced by a length of rolled stock between two drawing units, a unit for correlating the measured value to a corresponding value of applied drawing force, and a control unit for adjusting the applied drawing force as necessary to maintain it substantially at a selected constant value.

Abstract: The present invention relates to a process and to a device for the rolling of bands (B) with uneven thickness and/or length distribution over their width by using at least one control roller (5, 9, 21, 27, 41, 43) located on the inlet and/or outlet side of a mill (W, W', W") and capable of swiveling in its position relative to the band (B), making it possible in case of minor disturbances, independently of the existing operating conditions, to compensate for the running of a band caused by unevenness in the thickness and/or length distribution over the width of the band. This is achieved according to the invention in that the distribution of the tensile stress over the width of the band (B) is detected with at least one measuring device (7, 11, 25) and in that the control roller (5, 9, 21, 27, 41, 43) is adjusted in function of the detected distribution of tensile stress until the detected distribution of tensile stress is equal to a desired value.

Abstract: A control method of strip travel for ensuring, in a tandem rolling operation for metal strips, stable positioning of rolled work during the rolling process including the rolling of the leading and trailing ends of the work, and a tandem rolling mill in which the method is used are disclosed.

Abstract: A looper control system has a looper that is interposed between two rolling stands of a tandem rolling mill and is actuated by a hydraulic actuator; and a control calculating section for calculating a speed change rate command value of a primary rolling machine and a pressure command value of a hydraulic looper actuator so that an interstand tension and a looper height can be both controlled at target tension and looper height values, respectively, on the basis of a detected looper height value and a previously determined control gain. A resonance frequency changing section detects hydraulic flow rate of the hydraulic actuator and multiplies it by a gain to obtain a first speed change rate command value; and a damping constant changing section detects pressure in the hydraulic actuator and multiplies it by another gain to obtain a second speed change rate command value.

Abstract: An apparatus and method is shown for reforming the bottom of a container. The container is supported during processing by a container holder. A number of tooling rams each have a reforming roller supported by a pivot roller shaft that is in turn connectedly pinned to one end of a pivot arm. The opposite end of the pivot arm is connectedly pinned to an eccentric lug on a pivot base that is connected to a tooling drive shaft. The reforming roller is restrained axially by roller guide disks mounted to the tooling rams and is driven by the pivot arm such that the reforming roller travels along a circular orbital path of varying diameter in a plane perpendicular to the central axis of the pivot roller shaft and having a center of curvature position coextensive with the container axis. The tooling drive shaft is supported rotatably in and moved axially with a tooling ram that moves axially toward or away from the container.

Abstract: An apparatus and method is shown for reforming the bottom of a container. The container is supported during processing by a container holder. A number of tooling rams each have a reforming roller supported by a pivot roller shaft that is in turn connectedly pinned to one end of a pivot arm. The opposite end of the pivot arm is connectedly pinned to an eccentric lug on a pivot base that is connected to a tooling drive shaft. The reforming roller is restrained axially by roller guide disks mounted to the tooling rams and is driven by the pivot arm such that the reforming roller travels along a circular orbital path of varying diameter in a plane perpendicular to the central axis of the pivot roller shaft and having a center of curvature position coextensive with the container axis. The tooling drive shaft is supported rotatably in and moved axially with a tooling ram that moves axially toward or away from the container.

Abstract: An interstand tension controller for a continuous rolling mill having a plurality of rolling stands and provided with a looper between the adjacent rolling stands controls two controlled variables, i.e., the interstand tension of the workpiece and the looping angle of the looper, to adjust the measured interstand tension and the measured looping angle to desired values, has control loops that control the rotating speed of the rolls of the rolling stand and the looping torque or the looping speed of the looper to regulate the interstand tension and the looping angle, estimates disturbances acting on the control loops, the variation of the characteristics of the controlled system and the interference between the control loops, and operates manipulated variables to offset the disturbances.

Abstract: A procedure and an apparatus for forming a rectangular collar at the end of a pipe (34) by shaping it includes a forming element (1) which is moved in the axial direction of the pipe towards the pipe and rotated along the interior surface of the pipe end about the longitudinal axis of the pipe. The forming cone (1) is moved in the axial direction of the pipe towards the pipe so that, as it moves towards the pipe, the forming element (1) is automatically turned from an initial position to a final position by the thrust producing the movement, simultaneously forming the pipe end so as to produce a collar substantially rectangular with respect to the direction of the longitudinal axis of the pipe.

Abstract: A procedure and an apparatus for forming a rectangular collar at the end of a pipe (16) shape the pipe using a forming element (8) which is moved in the axial direction of the pipe (16) towards the pipe (16) and rotated along the edge surface of the pipe end about the longitudinal axis of the pipe. In the procedure, a conical collar is first produced, whereupon the forming element (8) is moved in the axial direction of the pipe away from the pipe (16) and turned to a position where its forming face is substantially perpendicular to the longitudinal axis of the pipe, whereupon a rectangular collar is formed.

Abstract: Apparatus (110, 180, 270, 330, or 360) either reforms a circumferential part (86) of a container body (11) radially outward to form a container body (64), or reforms a plurality of circumferentially-spaced parts (74) of the bottom recess portion (25) of a container body (11) radially outward to form a container body (62). The apparatus (110, 180, 270, 330, or 360) includes a body (158, 230, 288, 332, or 365) and has a tooling element attached thereto which may be a roller (172, 246, 302, or 350) or a swaging element (392). Means is included for providing relative transverse movement between the container body (11) and the tooling element (172, 246, 302, 346, or 392). Means (160, 222, 296, or 332) is provided for providing relative rotary movement between the container body (11) and the tooling element (172, 246, 302, or 346 ) in all embodiments except the apparatus ( 360 ) in which the bottom recess portion (25) is swaged.

Abstract: A method and apparatus for reforming the bottom of a drawn and ironed or a drawn beverage container, and a container made by that method. The container for which this method and apparatus are suitable has a vertical axis; a generally cylindrical side wall parallel with the vertical axis; an outer annular wall; a convex U-shaped portion; a preformed bottom wall including a center domed portion; and an annular, substantially vertical wall joining the domed portion and the convex U-shaped portion. The method comprises supporting the container in a jig, the jig having a bottom peripheral profile portion substantially corresponding in shape to the outer annular wall of the container. The bottom peripheral profile portion of the jig is then mated with the outer annular wall. A reforming roller is brought into engagement with the substantially vertical wall. The reforming roller rotates along the vertical wall and about an arcuate path, affecting the angle of the substantially vertical wall.

Abstract: Apparatus and method for forming external raised beads on hollow rigid tubing. The apparatus includes an adjusting screw threadably mounted into a threaded body member having one or more balls mounted in apertures in the body member. The body member is inserted into one end of the hollow tubing, the balls being disposed inside of the body member between a reduced diameter portion of the screw and the inner wall of the body member. When the screw is threaded into the body member, the balls are forced outwardly against the inner wall of the tubing forming a raised bead on the exterior of the tubing. Continued rotation of the screw and body member increases the height of the bead.

Abstract: After machining, the floor of a countersink is chased by means of rollers driven to execute an orbital motion, the angle which the attack surface of the rollers forms with the axis of the opening being progressively reduced as a function of the advance of the roller carrier. Application to the forming of connecting lips around the openings of a nuclear reactor vessel barrel.

Abstract: The present invention is a tool for repairing damaged pneumatic lines. The tool is small and compact, and is capable of being moved to the line to be repaired. The device has multiple rollers which may be adjusted to various line interior diameters and to various angles desired for the flange. When the tool is rotated, the rollers reform the flange in the subject line.

Abstract: A method and apparatus for rolling tubes into tube plates, especially heat exchangers, with a tube roller. Prior to the rolling process, the desired holding expansion value is set, and during the rolling process the holding expansion is measured. When the preset expansion value is reached, the expansion is discontinued. The magnitude of the holding expansion is determined by ultrasonically measuring the changing thickness of the wall of the tube during the expansion. The apparatus includes a tube roller that is operated by a drive mechanism. Also provided is a roll controller that can be set to the desired holding expansion value. An ultrasonic measuring head is provided in the tube roller, and is connected with the roll controller.

Abstract: A flexible extension assembly for use with a tube expander of the type having an expanding head which has internal apparatus driven for tube expansion by a drive device connected coaxially thereto with a spacer for locating the expanding head at a predetermined distance from the end of the tube to be expanded. The flexible extension assembly comprises a rigid hollow extension segment pivotably connected at one end to the expanding head and pivotably connected at the other end to the spacer so that the extension segment is pivotable into and out of coaxial alignment with the tube to be expanded, and an extension link slidably carried in the hollow rigid extension segment and pivotably connected at one end to the internal apparatus and pivotably connected at its other end to the drive shaft so that the extension link is pivotable with the extension segment into and out of coaxial alignment with the tube to be expanded.

Abstract: Fixture for machining the cutting line of a pipe, including a centering device insertible into an end section of the pipe, the centering device including a clamping system having pressure pieces with pressure surfaces formed thereon, the pressure pieces being disposed about the longitudinal axis of the centering device, and a pressure motor for driving the pressure pieces in radial direction of the pipe, for maintaining an equal distance between each of the pressure surfaces and the longitudinal axis of the centering device and for holding the centering device in the pipe with the clamping system, and a coupling device disposed at an end of the centering device along the longitudinal axis thereof for mounting an accessory device.

Abstract: A skiving and roller burnishing tool includes a plurality of frustoconically tapered rollers and a retractable knife for use in combination for finishing the internal surface of a cylindrical hole. The roller burnishing tool includes a roller race having a central axis and a frustoconical outer surface tapering radially outward and axially forward. The rollers are arranged about the outer surface of the race for rolling engagement with the internal surface of the hole. The smaller ends of the rollers face forward, and the taper of the rollers is such that the outermost surface portion of each roller is parallel to the central axis of the race. The rollers are biased in the forward direction using a roller pusher with a chosen force so that the force exerted on the internal surface of the hole remains constant over a range of sizes of the hole. The retractable knife includes a pair of radially extendible knife holders defining a camming path having an axial portion and an angled portion.

Abstract: A secondary working apparatus for secondarily machining a blank formed with internal serrations on a cylindrical plane, comprising a stationary housing structure, support means for supporting the blank with the center axis of the cylindrical plane fixed with respect to the housing structure, a plurality of shafts each having a center axis parallel with the center axis of the cylindrical plane and rotatable with respect to the housing structure about an axis coincident with the center axis of the shaft and an axis coincident with the center axis of the cylindrical plane, each of the shafts having a cylindrical eccentric axial portion having a center axis parallel with and radially offset from the center axis of the shaft, cylindrical machining tools coaxially carried on the eccentric axial portions of the shafts, respectively, and each having a center axis coincident with the center axis of the eccentric axial portion of each of the shafts, and an annular guide gear coaxially held in position about the center