Method and machine tool for machining a tire of a train wheel set

Abstract

Disclosed is a wheel set which comprises two wheel disks and is placed upon several support and drive rollers of a movable wheel set machine. The wheel set axle is the received between lathe centers of two tailstocks which are supported relative to each other. The position of the wheel set relative to the center of the machine is identified. A tool for machining the tire of at least one of the two wheel disks of the wheel set if first adjusted in the Z direction of the machine according to the result of the identification, the wheel set being made to rotate by means of one of the support and drive rollers. The back of the tire is subsequently planed with the aid of the tool. The planed back of the tire is supported in the Z direction, and the supported tire is profiled beginning from the front face thereof by means of a tool.

1 . Method for machining running surfaces of a railroad wheel set, wherein 
 the wheel set with both wheel disks is placed on several supporting and drive rollers of a movable wheel set machine,    the wheel set axle is received and centered between back centers of two supported tailstocks,    the position of the wheel set relative to the center of the machine is ascertained,    depending on the result of the ascertainment, a tool is first is adjusted first in Z direction of the machine to machine the running surface of at least one of the two wheel disks of the wheel set,    the wheel set is imparted rotation by at least one of the supporting and drive rollers,    the back of the running surface is then planed by means of the tool,    the planed back of the running surface is supported in Z direction and    the supported running surface is profiled by means of a tool.    
   
   
       2 . Method to machine running surfaces of a railroad wheel set, wherein 
 the wheel set axle is received and centered between back centers of two supported tailstocks of a movable wheel set machining machine,    the position of the wheel set relative to the center of the machine is ascertained,    depending on the result of the ascertainment, a tool for the machining of the running surface of at least one of the two wheel disks of the wheel set is first adjusted in Z direction of the machine,    a drive roller is applied to the running surface of at least one of the two wheel disks of the wheel set and rotation is thereby imparted to the wheel set,    the back of the running surface is then planed by means of the tool,    the planed back of the running surface is supported in Z direction and    the supported running surface is profiled by means of a tool.    
   
   
       3 . Method as in  claim 1 , wherein 
 the running surfaces are planed and/or profiled by turning, milling or grinding.    
   
   
       4 . Method as in  claim 1 , wherein 
 the position of the wheel set relative to the center of the machine is ascertained by tracing a shoulder or relief of the wheel set axle by means of a tracer.    
   
   
       5 . Method as in  claim 1 , wherein 
 the backs of each of the running surfaces of the two wheel disks of the wheel set are planed by means of a tool.    
   
   
       6 . Method as in  claim 5 , wherein 
 the AR distance between the two backs of the running surfaces is adjusted.    
   
   
       7 . Method as in  claim 1 , wherein 
 the planed back of the running surfaces is supported in Z direction by means of a roller.    
   
   
       8 . Method as in  claim 1 , wherein 
 brake disks that may also be present on the wheel set are machined by means of a tool.    
   
   
       9 . Method as in  claim 8 , wherein 
 the same tool is used to machine brake disks as to machine running surfaces.    
   
   
       10 . Machine tool for the machining of running surfaces and/or brake disks of railroad wheel sets by chip-removing machining, wherein 
 a movable machine frame,    two back centers each of which is supported in a tailstock so as to bew capable of longitudinal displacement and rotation and at a distance from each other in Z direction of the machine frame equal to the length of the wheel set length and aligned with each other,    a common support of the two tailstocks    at least one supporting and/or drive roller that can be brought to bear against the running surface of at least one of the two wheel disks of the wheel set ( 2 ) which can be brought into contact with.    at least one apparatus to ascertain the position of a wheel set in Z direction relative to the center of the machine frame,    at least one tool carriage with    at least one tool    one advance feed to move the tool carriage at least in directions X and Z and    one support of the running surfaces in Z direction.    
   
   
       11 . Machine tool as in  claim 10 , wherein 
 the common support of the two tailstocks consist of a yoke for each tailstock and two draw bars connecting the two yokes with each other.    
   
   
       12 . Machine tool as in  claim 10 , wherein 
 two supporting and drive rollers are provided for each wheel disk of the wheel set.    
   
   
       13 . Machine tool as in  claim 12 , wherein 
 the two supporting and drive rollers are at a distance from each other and are located nearly vertically below the wheel set held between the back centers.    
   
   
       14 . Machine tool as in  claim 13 , wherein 
 the two supporting and drive rollers can be adjusted and fixed in X direction.    
   
   
       15 . Machine tool as in  claim 10 , wherein 
 a tracer movable at least in Z and X directions is provided.    
   
   
       16 . Machine tool as in  claim 10 , wherein 
 the tool support is movable in X, Y and Z directions.    
   
   
       17 . Machine tool as in  claim 15 , wherein 
 the tool carriage is provided with a tool receptacle to receive a machining tool or a tracer    
   
   
       18 . Machine tool as in  claim 10 , wherein 
 at least one rotatably mounted supporting roller is provided and is longitudinally movable in Z direction.