A tube-facing machine includes a driving unit including a driving shaft and a motor for rotating the driving shaft, a cutting unit including a cutting tip mounted to the front end of the driving shaft and having a blade, and a tube-mounting unit. The cutting tip is disposed such that an angle between an imaginary reference line extending outwards from the center point of the tube in a radial direction and an imaginary line extending from the center point of the tube to a point at which the blade meets the inner circumference of the tube in a rotating direction of the cutting tip is greater than an angle between the imaginary reference line and another imaginary line extending from the center point of the tube to a point at which the blade meets the outer circumference of the tube in the rotating direction of the cutting tip.

An automatic movable machine configured such that: a vertical plate and a support plate are fixed, in a perpendicular direction to each other, to a semicircular chamfering angle adjusting plate fixed to a head of the movable chamfering machine; a moving body is provided at the vertical plate on the inside of the pipe or the lower side of the metal sheet, and equipped with an internal roller regulated by a spring contact with the inside of the pipe or the lower side of the metal sheet; the support plate has a fixing bolt; a fixing plate is provided to the support plate, and provided at the front of a gear box; and external rollers are provided at the front of the gear box, and allow the speed of the rotational force of a motor, to be reduced in the gear box and transmit the speed-reduced rotational force.

An apparatus (100) for machining a tubular or round-bar type piece, wherein the apparatus comprises a frame element (102), a machining unit (104), as well as a threaded shaft (110), which is fitted to the frame element in a rotatable and axially immobile fashion and has a first section 110a) provided with a right-handed thread and a second section (110b) with a left-handed thread. The first section is provided with at least one first support element (106a) and the second section is provided with at least one second support element (106b), the mutual distance between the support elements being adjustable in response to rotating the threaded shaft, such that the support elements, for example wheels, are adapted to touch a workpiece and to support and guide the apparatus (100) in the process of machining the piece. At least one of the support elements, such as wheels (106a, 106b), is adapted to be capable of rotating relative to its axis in response to moving the apparatus along the surface of a workpiece.

A facer for use in preparing the opposed ends of polyolefin pipes for fusion into a pipeline has a pair of cutting wheels which rotate in unison. A controller causes the cutting wheels to trace and face the pipe end walls in a closed loop path.

Disclosed is a chamfering machine which enables a smooth cutting operation by allowing a workpiece to be fixed to a position corresponding to an optimal cutting condition. The chamfering machine comprises a cutting position groove, which is formed in the bottom surface of an upper guide, and into which a part of the outer circumferential surface of a workpiece is inserted, wherein the central part of the cutting position groove is formed to correspond to the cutting end of a chamfering cutter. The machining method is configured such that the chamfering cutter enters perpendicular to a centerline direction of a circular material and, after entering while cutting, to a point where the cutting end of a cutting tip is in line with the centerline, rotates a tubular material or revolves the chamfering cutter around the tubular material and thus can cut the surface of the circular material.

The present invention relates to a portable pipe outer diameter-chamfering apparatus characterized in that a vertical fixing plate is fixed to the outside of the vertical plate, a horizontal fixing plate is fixed in an orthogonal direction to the tip of the vertical fixing plate, a rectangular link with one open side is coupled to move upward and downward along the vertical fixing plate, a pair of circumscribing rollers, each of the pair of circumscribing rollers being installed on either end portion of the rectangular link with one open side, respectively, the rectangular link with one open side moves up and down along the vertical fixing plate, a moving body is installed in the horizontal fixing plate, the moving body moves up and down, and an inscribing roller which is in close contact with an inside of the pipe is installed on the moving body.

A facer for use in preparing the opposed ends of polyolefin pipes for fusion into a pipeline has a pair of cutting wheels which rotate in unison. A controller causes the cutting wheels to trace and face the pipe end walls in a closed loop path.

Pipe machining apparatuses and methods are disclosed. Embodiments include placing a clamp around a plastic pipe and attaching a cutting tool to the clamp, the cutting tool moving around the clamp and around the pipe as the cutting tool shapes the pipe end by removing portions of the pipe end. Further embodiments include forming a male portion of a snap coupling on one pipe and forming a female portion of a snap coupling on another pipe and pressing the two coupling portions together until the two pipes associated with the coupling portions snap together. Still further embodiments include rotating the pipe as the cutting tool travels around the pipe. Additional embodiments include an adjustment mechanism that adjusts the radial and/or axial location of the cutting head with respect to the clamp and with respect to the pipe.

A cutting tool to cut a hollow vessel includes a conical member, a plurality of grooves, and a plurality of cutting members. The plurality of grooves are disposed in a semi-helix around an outer conical surface of the conical member. Each of the plurality of cutting members is disposed in fixed position within one of the plurality of grooves at a non-zero angle relative to a vertical axis.

According to an aspect of the present disclosure, a low profile travelling pipe cutter is provided which is adapted to perform at least one of cutting and beveling a hollow vessel while traveling around the vessel using a cutting tool mounted thereon. The pipe cutter includes inner and outer carriages, a capstan assembly attached to the outer carriage to which a feed cable is attached, and rollers attached to the outer carriage to which a tension cable is attached. The force adjustment assembly changes the vertical position of the outer carriage relative to the inner carriage to compensate for the pipe cutter going inwardly and outwardly as it travels around a hollow vessel in order to maintain constant pressure caused by the lever tension interface. A guard assembly is provided for covering and uncovering the cutting tool during cutting.