Method for producing a component of a synchronization device for a manual transmission

Abstract

The invention relates to a method for producing a component of a synchronization device for manual transmissions, in particular a synchronizer ring ( 1, 2, 3 ), wherein a round blank produced from metal is formed in a plurality of forming steps. In order to simplify the production process, it is proposed according to the invention that at least one of the forming steps is a hot forming step in which the round blank is partially heated to a temperature of more than 600° C. and is then formed in the partially heated forming portion.

1 . A method for producing a component of a synchronization device for a manual transmission, in particular a synchronizer ring, wherein a round blank produced from metal is formed in a plurality of forming steps,
 wherein   at least one of the forming steps is a hot forming step in which the round blank is partially heated to a temperature of more than 600° C. and is then formed in the partially heated forming portion.   
     
     
         2 . The method as claimed in  claim 1 , wherein the round blank is produced by means of stamping. 
     
     
         3 . The method as claimed in  claim 1 , wherein at least one of the forming steps is a cold forming step. 
     
     
         4 . The method as claimed in  claim 1 , wherein the round blank is produced from steel. 
     
     
         5 . The method as claimed in  claim 1 , wherein the forming portion is heated to a temperature above the austenitization temperature. 
     
     
         6 . The method as claimed in  claim 1 , wherein the forming portion is at least partially quenched and consequently hardened. 
     
     
         7 . The method as claimed in  claim 1 , wherein the forming portion is quenched during forming and consequently hardened. 
     
     
         8 . The method as claimed in  claim 1 , wherein the round blank is partially heated by means of laser or induction. 
     
     
         9 . The method as claimed in  claim 1 , wherein the thermal energy required for partial heating is supplied to the forming portion in less than 3 seconds. 
     
     
         10 . The method as claimed in  claim 1 , wherein a cooled forming tool is used for quenching. 
     
     
         11 . The method as claimed in  claim 1 , one of the preceding claims, wherein the hot forming step is carried out as a cycle in a cyclic sequence of forming and/or stamping steps. 
     
     
         12 . A component of a synchronization device for a manual transmission, in particular a synchronizer ring, comprising at least one press-hardened forming portion. 
     
     
         13 . The component as claimed in  claim 12 , wherein the press-hardened forming portion has one of the following configurations: toothing ( 4 ), indexing stud ( 5 ), centering stud ( 6 ), driving tab ( 7 ), driving stud ( 11 ), connecting web ( 14 ). 
     
     
         14 . The method as claimed in  claim 3 , wherein the cold forming step is deep drawing. 
     
     
         15 . The method as claimed in  claim 1 , wherein the round blank is produced from a steel alloy. 
     
     
         16 . The method as claimed in  claim 5 , wherein the forming portion is heated to a temperature of 850° C. to 1000° C. 
     
     
         17 . The method as claimed in  claim 6 , wherein the forming portion is consequently hardened by contact hardening. 
     
     
         18 . The method as claimed in  claim 9 , wherein the thermal energy required for partial heating is supplied to the forming portion in less than 1 second.