Method for producing a metal container

Abstract

Method for producing a metallic container ( 1 ) from a sheet material ( 2 ), the container ( 1 ), which is produced at least by deep drawing and/or extrusion along an axial direction ( 3 ), having at a first end ( 4 ) a base region ( 5 ) which at least partially closes the first end ( 4 ) and, adjoining the base region ( 5 ), a wall region ( 8 ) which extends along the axial direction ( 3 ) to a second end ( 6 ) and is formed circumferentially in a circumferential direction ( 7 ).

1 . A method for producing a metallic container from a sheet metal material, the metallic container comprising, at a first end, a base region which at least partially closes the first end and, adjacent to the base region, a wall region which extends along an axial direction towards a second end and is formed circumferentially in a circumferential direction, the method comprising:
 partially forming the sheet metal material in a second area along the axial direction, wherein the second area at least partially comprises an annular first area;   contacting the sheet metal material in the annular first area with a first punch; and   deep drawing and/or stretch-glide drawing the sheet metal material to form the base region and the wall region along the axial direction;   wherein a material thickness of the sheet metal material in the second area is reduced by the partial forming thus increasing at least one yield strength R p0,2  of the sheet metal material.   
     
     
         2 . The method of  claim 1 , wherein the second area is annular or annular-segment-shaped; and
 wherein the second area comprises an angular range of at least 180 angular degrees along the circumferential direction.   
     
     
         3 . The method of  claim 1 , wherein the annular first area is bounded by a first inner diameter and a first outer diameter;
 wherein the second area is bounded by a second inner diameter and a second outer diameter; and   wherein the second inner diameter is smaller than the first inner diameter.   
     
     
         4 . The method of  claim 3 , wherein the second outer diameter is larger than the first outer diameter. 
     
     
         5 . The method of  claim 1 , further comprising:
 contacting the sheet metal material with a second punch; and   deep drawing the sheet metal material with the second punch;   wherein the second punch has a larger punch outer diameter than the first punch.   
     
     
         6 . The method of  claim 5 , wherein contacting the sheet metal material with the second punch and deep drawing the sheet metal material with the second punch occurs after partially forming the sheet metal material in the second area along the axial direction. 
     
     
         7 . The method of  claim 1 , wherein
 partially forming the sheet metal material in the second area along the axial direction reduces the material thickness in the second area by at least 3% and a yield strength R p0,2  of the second area is increased by at least 5%.   
     
     
         8 . The method of  claim 1 , wherein deep drawing and/or stretch-glide drawing the sheet metal material to form the base region and the wall region along the axial direction is carried out at least partly with the first punch, the method further comprising further forming of the base region by a third punch,
 wherein a third area of the sheet metal material arranged within the first punch with regard to a radial direction is formed by the third punch along the axial direction towards the second end.   
     
     
         9 . The method of  claim 8 , wherein, the second area is displaced inwardly in the radial direction so that, after the further forming, the second area is arranged along the radial direction between the first punch and the third punch. 
     
     
         10 . The method of  claim 8 , wherein a wall section of the third area, extending at least along the axial direction, is formed outwardly in the radial direction in a fourth area. 
     
     
         11 . The method of  claim 10 , wherein the fourth area at least partially comprises the second area. 
     
     
         12 . The method of  claim 1 , wherein the method further comprises, before or after partially forming the sheet metal material in the second area along the axial direction, cutting out a sheet section of the sheet metal material, wherein the sheet section is deep-drawn and/or stretch-glide-drawn. 
     
     
         13 . A sheet metal material comprising a width forming a planar surface and a length and a material thickness;
 wherein the planar surface comprises a plurality of annular or annular-segment-shaped second areas having a second area material thickness reduced with respect to the planar surface.   
     
     
         14 . An apparatus for producing a metallic container from a sheet metal material, the apparatus comprising:
 a first punch configured to form the sheet metal material at least by deep drawing and/or stretch-glide drawing in a first area,   a holder configured to position the sheet metal material relative to the first punch, and   a device configured to form and/or reduce a material thickness of the sheet metal material in a second area.   
     
     
         15 . A container produced by the method of  claim 1 , the container comprising:
 at a first end, a base region at least partially closing the first end,   adjoining the base region, a wall region extending along an axial direction to a second end and formed circumferentially in a circumferential direction, and   a lid region at least partially closing the second end.   
     
     
         16 . The apparatus of  claim 14 , wherein:
 the device configured to form and/or reduce the material thickness of the sheet metal material in the second area comprises a second punch;   the second punch is located along an axial direction from the first punch; and   the second punch is configured to deep draw the sheet metal material in the second area.   
     
     
         17 . The apparatus of  claim 16 , wherein the second punch has a larger punch outer diameter than the first punch. 
     
     
         18 . The apparatus of  claim 14 , further comprising a third punch located along a radial direction from the first punch, wherein the third punch is configured to form and/or reduce the material thickness of the sheet metal material in the second area such that the second area is arranged along the radial direction between the first punch and the third punch; and
 wherein the third punch is configured to deep draw a third area.   
     
     
         19 . The apparatus of  claim 18 , further comprising a second device configured to form a fourth area that extends at least along an axial direction radially outward from the third area. 
     
     
         20 . The apparatus of  claim 14 , further comprising a third device configured to cut a sheet section from the sheet metal material.