A cutting torch guide assembly for cutting beveled openings includes a first rod that is hollow. A first sleeve is positioned around and slidably positionable on the first rod. A pin is coupled to and extends perpendicularly from the first sleeve. The pin is configured to couple to a metal substrate to define an axis of a penetration that is to be cut into the metal substrate. A second rod is positioned in and selectively extensible from the first rod. The first sleeve is positionable to select a diameter of the penetration on an opposing side of the metal substrate. The second rod is positionable relative to the first rod to select a thickness of the metal substrate. A ring coupled to the second rod is configured to insert a nozzle of a cutting torch so that the nozzle is positioned to cut a beveled penetration into the substrate.

An orbital welding device (1), having a welding current source (10) in a welding current source housing (11) and an orbital welding head (20), which is separate from the welding current source housing (11) and is connected to the welding current source (10) by a cable (2), the orbital welding head (20) having a pipe mount (21) and a welding electrode holder (22) for holding a welding electrode (23). An electric motor (31) is designed to drive the welding electrode holder (22) and thus turn it with respect to the pipe mount (21). The orbital welding head (20) has a chamber (50) for shielding gas. An optical oxygen sensor (40) is designed to measure an oxygen concentration in a measuring region (51) in the chamber (50). The oxygen sensor (40) is arranged outside the chamber (50) and is optically coupled to the measuring region (51) by an optical coupling.

An apparatus for volume reduction of material removed from a hazardous environment. The apparatus includes a shielded housing for receiving a workpiece therein, at least one cutting unit having a cutting head operable for contactless cutting, and a drive unit for rotating the at least one cutting unit around a main axis so the cutting head cuts the workpiece.

A method for manufacturing a razor cartridge component comprises continuously feeding an elongated band of material, separating one or more blade support elements from the elongated band of material, stabilizing the one or more separated blade support elements in a stationary position; providing one or more razor blades; and laser welding the one or more razor blades to respective ones of the stabilized one or more blade support elements.

A portable plasma cutting apparatus for coping and cutting pre-bend tubular members includes a control unit, a control arm, a first step motor, a second step motor, a linear drive mechanism, a rotary drive mechanism, a plasma cutter, a tube placement deck, and a platform. The control arm is operatively coupled with the first step motor by the rotary drive mechanism to rotationally drive the control arm around a rotational axis. The control arm is operatively coupled with the second step motor by the linear drive mechanism to linearly drive the control arm along the rotational axis. A torch of the plasma cutter is terminally mounted to the control arm and positioned in between the control unit and the tube placement deck as the control arm rotationally and linearly moves about the control unit. The platform provides the sufficient height for the portable plasma cutting apparatus.

A differential device including a planetary gear mechanism having a sub-gear, an annular gear and a planetary gear is more compact than a differential gear using a bevel gear mechanism. Since revolution torque of the planetary gear is transmitted to a free gear, and torque from the main gear is reduced to be transmitted, the differential device can use a small-sized drive unit in comparison with a conventional one. Hence, a machining apparatus including such a differential device is also compact. If the machining apparatus has three drive units, a pair of ring gears, first and second power transmission shafts, a radial movement mechanism and an axial movement mechanism, a tool holder, namely, a tool coupled to the radial movement mechanism and the axial movement mechanism, can be freely moved in axial and radial directions with respect to the pipe.

A hole cutting apparatus for cutting a hole in a tubular structure, which includes a center shaft, a slide mount rotatably attached to the center shaft, a slide rail slidably attached to the slide mount; a cutter attachable to the slide rail so as to move with the slide rail, and a cutter height roller attached to the cutter. The cutter height roller is structured and arranged to maintain the cutter at a distance from a cutting surface of the tubular structure as the hole is cut.

The invention is an apparatus and method for Orbital welding of pipes or pipe segments together to form a pipeline, i.e., Orbital welding. A scanner welding unit, a control unit and a welding unit are combined to travel along and above a seam, which is formed between two interfacing base/cylindrical surfaces of every two pipe or pipe segments, scan the pipes/pipe segments relative positioning, alignment and levelling, and their surface geometry and topography and overlay a welding material starting from the root layer at the bottom of the seam and up to its edge and sealing it with a capping layer. The welding unit lowers a welding tip into the seam that may rotate on its axis at different angels relative to the surface during welding. The scanner unit may alert on mismatches on the relative position of the pipes/pipe segments before or after welding and in some cases enable repositioning for a more hermetically sealed weld.

In one embodiment, an apparatus for attachment to a pipe cutter having a saddle portion is disclosed comprising a first member suitable for mounting to the saddle portion, a second member suitable for mounting to a pipe and a pivoting joint to pivotally connect first member to second member. In another embodiment, an apparatus for attachment to a pipe cutter having a saddle portion is disclosed comprising a first member suitable for mounting to the saddle portion, a second member suitable for mounting to a pipe, a pivoting joint to pivotally connect first member to second member, pipe mounting means to securely mount second member to said pipe, angle adjustment means and at least one fastener to securely fasten first member to the saddle portion of the pipe cutter.

An orbital welding device (1), having a welding current source (10) in a welding current source housing (11) and an orbital welding head (20), which is separate from the welding current source housing (11) and is connected to the welding current source (10) by a cable (2), the orbital welding head (20) having a pipe mount (21) and a welding electrode holder (22) for holding a welding electrode (23). An electric motor (31) is designed to drive the welding electrode holder (22) and thus turn it with respect to the pipe mount (21). The orbital welding head (20) has a chamber (50) for shielding gas. An optical oxygen sensor (40) is designed to measure an oxygen concentration in a measuring region (51) in the chamber (50). The oxygen sensor (40) is arranged outside the chamber (50) and is optically coupled to the measuring region (51) by an optical coupling.