A skiving apparatus is provided for at least partial removal of the surface of an least approximately tubular body having a center axis, in particular of a plastic pipe, comprising a clamp assembly having a center axis and at least one clamp member for clamping the skiving apparatus to the tubular body, a skiving assembly comprising a skiving arm unit, a skiving knife arrangement disposed at a first end of the skiving arm unit, and a skiving arm support that connects the clamp assembly to the skiving arm unit. The skiving arm unit is connected by its first and second ends to the skiving knife arrangement and the skiving arm support and is pivotable in the common plane with the center axis of the clamp assembly in such a way that the skiving knife arrangement keeps its orientation relative to the center axis of the clamp assembly in every pivoted position of the skiving arm unit. A clamp assembly as a tool holder for a tool such as a skiving tool is also provided, for machining an approximately tubular body having a center axis, in particular a plastic pipe, having a center axis, a mandrel disposed coaxially with the center axis of the clamp assembly, and at least one clamping device disposed on the mandrel and directed substantially radially outwards.

A pipe facing machine (PFM) system includes a PFM and a hydraulic power source having a single hydraulic pump arranged to provide a hydraulic oil flow to the PFM via single hydraulic circuit. The PFM includes a body defining an axis and a cutting head arranged to rotate and translate relative to the axis. Drive systems are arranged to drive clamping of the PFM on a workpiece, rotation of the cutting head about the axis, and translation of the cutting head along the axis. A hydraulic controller includes a plurality of control elements and hydraulically connects the drive systems. The hydraulic controller is arranged to direct and regulate hydraulic oil flow between the drive systems and the hydraulic controller based on signals from the control elements and a computer control system.

In one aspect tool holder assemblies are described herein. Such tool holder assemblies can employ outer and inner spring-like members. For example, a tool holder assembly described herein comprises a drawbar having an outer diameter surface and an inner diameter surface defining an interior of the drawbar. The drawbar is movable or actuatable along a longitudinal axis between a locked position and an unlocked position. The tool holder assembly can further comprise a first spring-like member positioned around the outer diameter surface of the drawbar and a second spring-like member positioned in the drawbar interior.

An actuatable boring bar is configured to place a cutting insert cartridge received onto the boring bar in a cutting position when the centrifugal force generated by the rotation of the boring bar about the rotation axis reaches a centrifugal force threshold and in a non-cutting position when the centrifugal force generated by the rotation of the boring bar about the rotation axis is below the centrifugal force threshold. The boring bar is further configured so that the cutting insert cartridge can be set-up onto the boring bar in the cutting position.

A selection system, comprising: a sheath defining an internal housing extending in a longitudinal direction; a link rod disposed in said internal housing, and extending in the longitudinal direction; and a selection slide mounted to slide in the internal housing, about the link rod; the link rod being held stationary relative to the sheath against movement in translation in the longitudinal direction by stop means; the system being characterized in that the stop means comprise: a base that is a body of revolution and includes a conical portion; and a shell comprising two shell portions each including a conical portion configured to come to bear in plane manner against the conical portion of the base.

A device for selectively moving a first or second tool relative to a workpiece on a lathe, the device including a first and a second tool providing system, each of the tool providing systems including a guide rail having a length direction, a slide slidably mounted on the guide rail, the slide being shiftable from a waiting position to a work position, a tool retainer on the slide, a block fixed relative to the guide rail, a first lever pivotably mounted to the block, a second lever having a first end pivotably mounted to the block and a second end pivotably mounted to the slide, and a linear actuator having a rod pivotably connected to the first lever, the rod extending in a direction not parallel to the length direction of the guide rail and being shiftable from a first position to a second position.

A machine control system for a multi-spindle machine includes a controller (42, 86). The controller is operative to reduce the risk of potentially damaging machining chip formation by controlled disengagement of a low speed clutch (18) of a transmission (14) which drives spindles (36) which rotate work pieces. Automatically selectively varying timing and duration of periods of disengagement of the low speed clutch breaks the continuity of chips to reduce the risk of developing damaging conditions as a result thereof.

A hydraulic fluid actuated lathe tool mounting expander assembly incorporating a block having a base, an inner end, an outer end, a compression end, and a compression face; a first cylindrical void extending into the block, the first cylindrical void having a floor and opening at the block's compression face; a second cylindrical void extending into the block, the second cylindrical void having a floor and opening at the block's outer end; first and second pistons respectively slidably mounted within the first and second cylindrical voids; a conduit extending between the first and second cylindrical voids, the conduit being adapted for conveying the hydraulic fluid from the second cylindrical void to the first cylindrical void; and a jack screw actuator connected operatively to the block for driving the second piston against the hydraulic fluid for upwardly driving the first piston.

When a wheel clamp is used, width of a wheel is detected first, a first servo motor drives a lead screw to rotate, a supporting block and a lifting plate are automatically adjusted to appropriate heights via a nut, a manipulator puts the wheel onto end face blocks, air-tight devices are pressed down, an oil cylinder drives a chuck so that clamping jaws expand the central hole of the wheel, meanwhile, four air cylinders drive clamping blocks to compact outer side of the wheel, and the wheel is completely positioned; at this moment, a bolt hole of the wheel can be drilled; after machining, second servo motor drives right shaft, right lug plate and a turnover part to rotate certain angles via second decelerator; high pressure oil is introduced into cavities between ipsilateral expansion sleeves and end covers, and left and right shafts are separately locked by ipsilateral expansion sleeves.

A threaded pin remover for a threaded pin in an interference fit in a structure is provided. The threaded pin remover includes a housing. A pin grasper is slidably mounted in the housing and includes: a first end configured to couple to a linear actuator for slidably moving the pin grasper between an extended position relative to the housing and a retracted position relative to the housing. A second end of the pin grasper includes a pin grasping collet configured to, in the retracted position relative the housing, engage with a portion of the housing to cause grasping of the exposed portion of the threaded pin by the pin grasping collet to release the threaded pin from the interference fit, allowing removing of the threaded pin from the structure.