Method for producing an assembly

Abstract

The invention relates to a method for producing an assembly ( 1 ) consisting at least of a first component ( 2 ) and a second component ( 3 ), the first component ( 2 ) being arranged at least partly inside the second component ( 3 ), and the first component ( 2 ) and the second component ( 3 ) being produced from at least one metal sintering powder according to a sintering method comprising the steps of powder pressing and sintering. The first component ( 2 ) and the second component ( 3 ) consisting of the at least one metal sintering powder are pressed together in a mold to form a one-piece green compact ( 4 ) and the two components ( 2, 3 ) are only separated after sintering.

1 . A method for producing an assembly ( 1 ) comprising at least a first component ( 2 ) and a second component ( 3 ), the first component ( 2 ) being arranged at least partly inside the second component ( 3 ), and the first component ( 2 ) and the second component ( 3 ) being produced from at least one metal sintering powder according to a sintering method comprising the steps of powder pressing and sintering, wherein the first component ( 2 ) and the second component ( 3 ) comprising the metal sintering powder are pressed together in a mold to form a one-piece green compact ( 4 ) and the two components ( 2 ,  3 ) are only separated after sintering. 
     
     
         2 . The method as claimed in  claim 1 , wherein the first component ( 2 ) is connected to the second component ( 3 ) by at least one predetermined breaking point. 
     
     
         3 . The method as claimed in  claim 2 , wherein the predetermined breaking point is in the form of at least one web ( 8 ). 
     
     
         4 . The method as claimed in  claim 3 , wherein the at least one web ( 8 ) is formed between an outer surface ( 10 ) of the first component ( 2 ) and an inner surface ( 13 ) of the second component ( 3 ). 
     
     
         5 . The method as claimed in  claim 3 , wherein the at least one web ( 8 ) is formed off-center and in the area of one end face ( 17 ) of the first component ( 2 ) and/or in the area of one end face ( 19 ) of the second component ( 3 ). 
     
     
         6 . The method as claimed in  claim 3 , wherein a plurality of webs ( 8 ) are formed distributed evenly over a periphery ( 11 ) of the first component ( 2 ). 
     
     
         7 . The method as claimed in  claim 6 , wherein the plurality of webs ( 8 ) are formed at the same level. 
     
     
         8 . The method as claimed in  claim 1 , wherein the first component ( 2 ) and the second component ( 3 ) are joined together on their end faces. 
     
     
         9 . The method as claimed in  claim 1 , wherein the first component ( 2 ) is produced coaxially relative to the second component ( 3 ). 
     
     
         10 . The method as claimed in  claim 1 , wherein the first component ( 2 ) is separated from the second component ( 3 ) by breaking or by piercing or by turning. 
     
     
         11 . The method as claimed in  claim 1 , wherein the first component ( 2 ) is produced as a rotor and the second component ( 3 ) is produced as a stator of a pump. 
     
     
         12 . The method as claimed in  claim 1 , wherein the first component ( 2 ) is produced from a first sintering powder and the second component ( 3 ) is produced from a second sintering powder, wherein the first sintering powder has a different composition than the second sintering powder. 
     
     
         13 . A press mold ( 7 ) for producing a green compact ( 4 ) for an assembly ( 1 ) comprising at least a first component ( 2 ) and a second component ( 3 ), with a mold cavity for receiving at least one sintering powder, wherein the mold cavity comprises a first mold cavity ( 23 ) for the first component ( 2 ) and a second mold cavity ( 24 ) for the second component ( 3 ), wherein the first mold cavity ( 23 ) is separated from the second mold cavity ( 24 ) by at least one mold wall ( 25 ), and wherein the first mold cavity ( 23 ) is also surrounded at least partly by the second mold cavity ( 24 ), and wherein in the mold wall ( 25 ) separating the first mold cavity ( 23 ) from the second mold cavity ( 24 ) at least one opening ( 26 ) is formed, by means of which the first mold cavity ( 23 ) is connected to the second mold cavity ( 24 ). 
     
     
         14 . The press mold ( 7 ) for producing a green compact ( 4 ) for an assembly ( 1 ) comprising at least a first component ( 2 ) and a second component ( 3 ), with a mold cavity for receiving at least one sintering powder, and a pressing punch ( 27 ), wherein the mold cavity comprises a first mold cavity ( 23 ) for the first component ( 2 ) and a second mold cavity ( 24 ) for the second component ( 3 ), wherein the first mold cavity ( 23 ) is separated from the second cavity ( 24 ) by at least one mold wall ( 25 ), and wherein in a base area of the mold cavity and/or the pressing punch ( 27 ) at least one depression ( 30 ) is formed by means of which the first mold cavity ( 23 ) is connected to the second mold cavity ( 24 ).