Friction ring and method for producing same

Abstract

The invention relates to a friction ring, in particular for wet-running clutches or transmissions, having a carrier ( 10 ) and a friction lining ( 12 ), with a friction lining starting material ( 20 ) being a mixture at least of a thermosetting binder and a filler, and with the friction lining starting material ( 20 ) having a non-flowable, pasty processing consistency and the friction lining ( 12 ) having a solid final consistency after processing on the carrier ( 10 ). The invention further relates to a method of producing such a friction ring.

1 . A friction ring, in particular for wet-running clutches or transmissions, comprising
 a carrier ( 10 ), and   a friction lining ( 12 ),   wherein a friction lining starting material ( 20 ) is a mixture at least of a thermosetting binder and a filler, and   wherein the friction lining starting material ( 20 ) has a non-flowable, pasty processing consistency and the friction lining ( 12 ) has a solid final consistency after processing on the carrier ( 10 ).   
     
     
         2 . The friction ring according to  claim 1 , characterized in that the friction lining ( 12 ) is produced to be substantially fiber-free. 
     
     
         3 . The friction ring according to  claim 1 , characterized in that the friction lining ( 12 ) includes fibers, in particular exclusively non-fibrillated fibers. 
     
     
         4 . The friction ring according to  claim 3 , characterized in that the mass fraction of the fibers is in the range of from 1% to 20% of the solid fraction of the friction lining ( 12 ). 
     
     
         5 . The friction ring according to  claim 1 , characterized in that the friction lining starting material ( 20 ) includes a solvent in the processing consistency. 
     
     
         6 . The friction ring according to  claim 1 , characterized in that the friction lining starting material ( 20 ) includes a substance for adjusting a desired processing consistency. 
     
     
         7 . The friction ring according to  claim 1 , characterized in that the friction lining ( 12 ) has interruptions in the peripheral direction and/or has a flat or conical cross-sectional profile. 
     
     
         8 . The friction ring according to  claim 1 , characterized in that the friction lining ( 12 ) has a multilayer structure. 
     
     
         9 . The friction ring according to  claim 8 , characterized in that the multilayer friction lining ( 12 ) includes at least two friction lining layers having different friction lining starting materials ( 20 ). 
     
     
         10 . The friction ring according to  claim 1 , characterized in that the friction lining ( 12 ) includes friction particles, in particular coke particles, in the region of its friction surface. 
     
     
         11 . The friction ring according to  claim 1 , characterized in that the fraction of the thermosetting binder varies over a height (h) of the friction lining ( 12 ), in particular decreases from the carrier ( 10 ) towards a friction surface. 
     
     
         12 . A wet-running multiple disk friction system comprising at least one friction ring according to  claim 1 . 
     
     
         13 . A wet-running multiple disk friction system according to  claim 12 , characterized in that it is a transmission including at least one synchronizer ring, a wet-running brake, or a wet-running clutch. 
     
     
         14 . A method of producing a friction ring which includes a carrier ( 10 ) and a friction lining ( 12 ), comprising the steps of:
 a) providing a carrier ( 10 );   b) preparing a surface ( 14 ) of the carrier ( 10 ), which surface ( 14 ) is to be provided with the friction lining ( 12 );   c) applying a friction lining starting material ( 20 ) in a substantially dimensionally stable, pasty processing consistency onto the prepared surface ( 14 ) without an additional mold bordering the friction lining starting material ( 20 ) on the sides;   d) treating the friction lining starting material ( 20 ), which finally cures to form the friction lining ( 12 ) having a substantially solid final consistency.   
     
     
         15 . The method according to  claim 14 , characterized in that the pasty friction lining starting material ( 20 ) is applied in step c) by means of at least one metering pump ( 22 ). 
     
     
         16 . The method according to  claim 14 , characterized in that in step c) the friction lining starting material ( 20 ) is applied onto the prepared surface ( 14 ) during one revolution of the carrier ( 10 ). 
     
     
         17 . The method according to  claim 14 , characterized in that in step c) the friction lining starting material ( 20 ) is spirally applied onto the prepared surface ( 14 ) during several revolutions of the carrier ( 10 ). 
     
     
         18 . The method according to  claim 14 , characterized in that after step c), friction particles are applied onto the pasty friction lining starting material ( 20 ), further preferably characterized in that during the treatment of the friction lining starting material ( 20 ) in step d), the friction particles penetrate at least in part into the friction lining starting material ( 20 ). 
     
     
         19 . The method according to  claim 14 , characterized in that in step d), the friction lining starting material ( 20 ) is dried and/or hot-pressed.