Method for the production of a structure element

Abstract

The invention relates to a process for producing a structural element, having at least one cavity-forming half-shell, comprising at least two lips which together form at least one flange, and is distinguished by the fact that at least the lips are provided, at their contact surfaces, with a foam semi-finished product, that the lips are brought together with the aid of a clamping force, that the foam semi-finished product is activated, and the lips are welded together by the activated foam semi-finished product.

1 . A process for producing a structural element, having at least one cavity-forming half-shell, comprising at least two lips which together form at least one flange, wherein 
 at least the lips are provided, at their contact surfaces, with a metallic foam semi-finished product,    the lips are brought together with the aid of a clamping force,    the foam semi-finished product is activated, and the lips are welded together by the activated foam semi-finished product.    
   
   
       2 . The process as claimed in  claim 1 , wherein the half-shells, at least at the lips, are coated with the metal of the foam semi-finished product.  
   
   
       3 . The process as claimed in  claim 1 , wherein the foam semi-finished product is activated by thermal means.  
   
   
       4 . The process as claimed in  claim 1 , wherein the foam semi-finished product is arranged between the lips and in the cavity, and the cavity ( 13 ,  35 ,  37 ) is at least partially filled with foam as a result of the activation of the foam semi-finished product.  
   
   
       5 . The process as claimed in  claim 1 , wherein the foam semi-finished product is arranged areally over the surface of the half-shell on the cavity side.  
   
   
       6 . The process as claimed in  claim 4 , wherein the foam semi-finished product is applied to the surface of a metal sheet by roll cladding and the metal sheet is deformed to form the half-shell.  
   
   
       7 . The process as claimed in  claim 1 , wherein a sheet-like foam semi-finished product is clamped between the lips of the at least one flange, and at least subregions of the foam semi-finished product are located freely inside the cavity.  
   
   
       8 . The process as claimed in  claim 1 , wherein the at least one half-shell is clamped into a die.  
   
   
       9 . The process as claimed in  claim 1 , wherein to the foam semi-finished product is based on metal, in particular zinc, tin or aluminum.  
   
   
       10 . A process for producing a structural element, comprising the steps of: 
 providing at least one cavity-forming half-shell including at least two lips which together form at least one flange, wherein at least the lips are provided, at their contact surfaces, with a metallic foam semi-finished product;    bringing together the lips with the aid of a clamping force;    activating the foam semi-finished product; and    fixing the lips together with the activated foam semi-finished product.    
   
   
       11 . The process as claimed in  claim 10 , wherein the half-shells, at least at the lips, are coated with the metal of the foam semi-finished product.  
   
   
       12 . The process as claimed in  claim 10 , wherein in the step of activating the foam semi-finished product, the foam semi-finished product is activated by thermal means.  
   
   
       13 . The process as claimed in  claim 10 , wherein the foam semi-finished product is arranged between the lips and in the cavity, and the cavity is at least partially filled with foam as a result of the activation of the foam semi-finished product.  
   
   
       14 . The process as claimed in  claim 10 , wherein the foam semi-finished product is arranged areally over the surface of the half-shell on the cavity side.  
   
   
       15 . The process as claimed in  claim 13 , wherein in the step of providing at least one cavity-forming half-shell, the foam semi-finished product is applied to the surface of a metal sheet by roll cladding and the metal sheet is deformed to form the half-shell.  
   
   
       16 . The process as claimed in  claim 10 , wherein in the step of providing at least one cavity-forming half-shell, a sheet-like foam semi-finished product is clamped between the lips of the at least one flange, and at least subregions of the foam semi-finished product are located freely inside the cavity.  
   
   
       17 . The process as claimed in  claim 10 , further comprising the step of: 
 clamping the at least one half-shell into a die.    
   
   
       18 . The process as claimed in  claim 10 , wherein the foam semi-finished product is based on a metal.  
   
   
       19 . The process as claimed in  claim 18 , wherein the metal is at least one of zinc, tin and aluminum.