A method for reconditioning a railcar connector is provided. The method comprises machining a portion of a casting to create a wear plate application surface, positioning a plate on the wear plate application surface, and welding the wear plate to the wear plate application surface.

A welding unit for connecting two rails of a track by flash-butt welding, includes clamping jaws having contact surfaces intended for application to a rail web and a power jaw for current transmission having a contact surface for application to the rail web. The power jaw is displaceable relative to the clamping jaw in a pressing direction leading to contact with the rail. In an inoperative position spaced from the rail web, the power jaw, due to the pressure of a pressure spring, is situated in a forward end position with regard to the pressing direction, in which the contact surface of the power jaw projects beyond the contact surface of the clamping jaw.

A method for semi-automatically reconditioning a railcar articulated connector that comprises a male portion including a parent casting material is provided. The method comprises applying weld material to a male portion of an articulated connector, mounting a housing mounting a housing defining an interior space to the male portion, the male connector within the interior space, centering and stabilizing the fixture laterally on the male portion, inserting a clamping mechanism attached to the housing within an opening of the male connector to affix the housing to the male portion, securing the clamping mechanism to a surface of the male portion, and automatically machining at least a portion of the weld and/or parent casting material.

Application of the machine for flash-butt welding of rails with one rod, which connects two tong-type clamping devices is widening greatly the functional capabilities at its service, both in welding of separate rails and also in repair of rail tracks under the field conditions and in hard-to-reach places such as railway switches and frogs, the underground tracks, rails, which are laid side by side at a close distance, etc., not changing the optimum process and quality of the welded joints.

A welding unit for welding rails of a track includes a shearing device for removing a weld bead. The shearing device includes a head part having a shearing edge and two side parts which are pivotable towards one another and have a shearing edge. A rail base section to be applied to a rail base is associated with each side part. The rail base sections each include an end region facing towards each another having a tooth system for a form-locking connection which is effective in a longitudinal direction of the rail after the two side parts have been applied to the rail.

This welding method is a flash butt welding method of a pair of track rail steel pieces, having: a preheating process in which electric current is made to flow for a predetermined time in a state in which the welding surfaces of a pair of track rail steel pieces are forcibly brought into contact with each other, and vicinities of the welding surfaces are heated by resistance heating; a former flashing process in which flashing is partially caused in the welding surfaces, and the welding surfaces are heated by the resistance heating and arc heating of the flashing; and a latter flashing process in which the flashing is furthermore caused throughout the entire welding surfaces, and the entire welding surfaces are uniformly heated by the resistance heating and arc heating of the flashing, in which a latter flashing velocity is 2.1 mm/sec to 2.8 mm/sec in the latter flashing process.

A method of repairing a rail wheel including removing a selected segment of a rim of the rail wheel to provide a remaining segment having a first engagement surface, and providing a replacement workpiece including a replacement body element having a second engagement surface formed to mate with the first engagement surface. The replacement workpiece is positioned to define a predetermined gap between the first and second engagement surfaces. One or more heating elements are positioned in the predetermined gap, for induction heating, in a non-oxidizing atmosphere, of first and second heated portions of the remaining segment and the replacement workpiece, and the first and second engagement surfaces, to a hot working temperature, for plastic deformation thereof. The heating elements are removed, and the first and second engagement surfaces are engaged for plastic deformation of at least part of the first and second heated portions and the engagement surfaces.

A method for brazing an electrically conducting connecting piece, for example a cable shoe, of an electrically conducting material to a workpiece of electrically conducting material, by means of a temperature controlled brazing process in which the heat necessary for brazing is generated by striking an electric arc between a carbon electrode, and the electrically conducting connecting piece, where the voltage and current is electronically controlled by control electronics to achieve a temperature development to result in a martensite free brazing, and wherein the DC voltage applied is using the carbon electrode as the negative pole, and using the electrically conducting connecting piece as the positive pole, and 0 wherein the carbon electrode is having a tapering, bevelled, or pointy end at the end facing the electric arc.

A welding unit for welding rails of a track includes a first sub-unit which is displaceable on unit guides in a rail longitudinal direction relative to a second sub-unit by using displacement cylinders. Each sub-unit includes clamping cylinders disposed underneath the unit guides and coupled to clamping jaws for clamping the rails. The two sub-units are connected by the displacement cylinders in that a cylinder body of the respective displacement cylinder is connected to one sub-unit and a piston rod of the respective displacement cylinder is connected to the other sub-unit. Thus, it is not necessary to support the displacement cylinders relative to a transverse beam disposed at the front.

A rail welding method and device are provided. The method includes: welding a bottom of rail, wherein welding is repeatedly performed along a first swing trajectory in a lengthwise direction of a weld seam, from one end of the bottom of rail to the other end of the bottom of rail; welding a waist of rail, wherein welding is repeatedly performed in the lengthwise direction of the weld seam along a second swing trajectory, from one end of the waist of rail, and the second swing trajectory is divided into two regions for respective welding in a width direction of the weld seam; and welding a head of rail, wherein welding is performed in the lengthwise direction of the weld seam along the first swing trajectory, between one end of the head of rail and the other end of the head of rail.