MANUFACTURING METHOD OF ANTIFRICTION DOUBLE-LAYER SELF-CENTERING BUSHINGS FROM POLYMERIC COMPOSITE MATERIALS Russian patent published in 2009 - IPC F16C33/04 B61H13/34 

FIELD: machine building.

SUBSTANCE: invention relates to machine building and can be used at manufacturing of bushings of any purposes, including and for lever braking system of transit vehicles and also of passenger and freight stocks. Distinctive features of manufacturing method is that reinforcing fibers of polymer composite material of working and damping layer of bushing is impregnated each in the capacity of binding agent of phenol-formaldehyde or cresol formal resin in the form of novolak or resol form, containing adhesive and anti-adhesive. After drying fibers are cut for rope strands and it is implemented performing of chaotically located in mould of rope strands with application to tablet material of pressure and with receiving of two different semi-finished products in the form of horizontal semicircles. There are located semi-finished products in vertical mould with dimensions of manufactured bushing, matching to each other at first two semi-finished products for manufacturing of damping layer. There are laid into mould two semi-finished products for manufacturing of working layer, herewith docking interfaces of semi-finished products are located in mould crosswise relative to each other. Finishing hot pressing of bushing is implemented with application of compressing effort lengthwise the axis of manufactured bushing, additionally bushing during compressing is isolated under pressure during particular time.

EFFECT: increasing of bushing operation life, reduction of total linear wear in friction pair by contour-body of steel, providing of specified ultimate compression strength and impact elasticity at simultaneous keeping of steadiness to interleaving during operation.

2 cl, 3 ex