METHOD FOR OBTAINING CONTACT INSERTS OF TROLLEY BUSES Russian patent published in 2014 - IPC B22F3/20 B60L5/08 

FIELD: metallurgy.

SUBSTANCE: powder composition based on carbon is extruded from a press container through a mouth-piece with formation of a profiled working surface of the insert and further division of the obtained semi-finished product into separate workpieces. The semi-finished product is extruded in the form of two workpieces of inserts with opposite lying profiled surfaces, which face to each other with their bottoms; with that, powder composition is divided with a divider along the extrusion axis into two workpieces of inserts. After the profiled surfaces of workpieces leave the mouth-piece, they are calibrated in a four-roll gauge formed with two smooth and two drive calibrated opposite lying rolls, with crimping equal to 5-10%.

EFFECT: improving quality of the obtained inserts by eliminating bending as to length and increasing density and strength of their working profiled surface.

2 dwg