During aluminothermic welding, excess metal remains above the rail head. This was traditionally removed manually with a hammer and chisel.
The hydraulic shearing machine is much safer to use than the traditional hammer and chisel method of reducing excess metal, which was hard work and exposed workers to projections of metal.
With the shearing machine, there is no risk of damaging the rail.
The adjustable blades and guiding rollers result in much greater precision than possible when removing the metal deadhead manually.
The powerful hydraulic unit significantly reduces grinding time, saving money and decreasing downtime.
The upper positioning of the handles on the shearing machine ensures the operator remains a good distance from the hot area, increasing safety.
The positioning of the handles and the machine’s light weight, thanks to the separate hydraulic unit, make it easy to carry around.
The Bi-Bloc Weld Shear EGH1 is a narrow unit, able to operate in turnouts thanks to its small size. The EGH2 model is wider, bringing more comfort when shearing through the mould for Vignol rail. The EGH2 RAG is the declination of the EGH2 for grooved rail.
The shear is able to produce a force of 21.5 tons under a pressure of 250 bars.
Two blades, one on either side of the weld, move and cut off the excess metal. Adjusting screws enable the blades’ cutting edge to be adjusted exactly, both laterally and vertically.
A hydraulic distributor with manual control lever keeps the blades moving. Loosening the action on the distributor control lever stops the translator movement.
Locking systems fixed under the rail head prevent the shearing machine from rising up and adjust the cutting operation to the thickness of the metal deadhead.
The shear is operated by a separate hydraulic unit with two power sources; either an electrical motor or a gas power engine.