Finned multi-aperture sheet metal, method of manufacturing the sheet metal, part for exhaust emission control device using the sheet metal, and method of manufacturing the part for exhaust emission control device

Abstract

A holed sheet metal with multiple holes most suitable for forming a spaced body with a net-like cross section as a part for exhaust emission control device, a method of manufacturing the sheet metal, a part for exhaust emission control device using the sheet metal, and a method of manufacturing the part, wherein a plurality of holes ( 3 ) are formed in a long flat-like sheet metal ( 2 ) to form the finned sheet metal ( 1 ), and die holes ( 3 ) in the finned sheet metal ( 1 ) are formed by bending fins ( 8 ) from the sheet metal ( 2 ) in the direction of one surface side of the sheet metal, whereby the sheet metal can be easily provided at a low cost.

1 . A finned multi-aperture sheet metal in which a plurality of holes is formed in a long flat band-like sheet metal, wherein each of the holes is formed by bending a fin toward one surface side from the sheet metal.  
   
   
       2 . A finned multi-aperture sheet metal in which a plurality of holes is formed in a long flat band-like sheet metal, wherein each of the holes are formed by bending a fin toward any one of surface sides from the sheet metal.  
   
   
       3 . A method of manufacturing a finned multi-aperture sheet metal in which at least holes with a fin are formed in a long flat band-like sheet metal, wherein a plurality of substantially U-shaped cut lines is formed on the sheet metal, each of tongue portions formed based on the respective cut lines is selectively bent toward any one of surface sides of the sheet metal to form a fin projected in a bending direction, each of portions surrounded by the cut line is opened, and thereby holes with a fin are formed.  
   
   
       4 . A method of manufacturing a finned multi-aperture sheet metal in which at least holes with a fin are formed in a long flat band-like sheet metal, wherein between a perforating roller that is provided on an outer periphery surface with a plurality of projection-like blades each of which is capable of forming a substantially U-shaped cut line on the sheet metal and of bending a tongue portion formed based on the cut line outwards and a receiving roller that faces the perforating roller and is provided on an outer periphery surface with a plurality of grooves each of which is capable of temporally accommodating the projection-like blade formed on the perforating roller and the tongue portion bent by the projection-like blade, a long flat band-like sheet metal is continuously supplied, the cut lines are formed in substantial U-shape on the sheet metal by use of the projection-like blades, each of the tongue portions formed based on the cut lines is bent outward to form a fin, each of portions surrounded by the cut lines is opened, and thereby the holes with a fin are formed.  
   
   
       5 . A method of manufacturing a finned multi-aperture sheet metal in which at least holes with a fin are formed in a long flat band-like sheet metal, wherein on an outer periphery surface of one roller of a pair of rollers disposed oppositely, a plurality of projection-like blades each of which is capable of forming a substantially U-shaped cut line and of bending outwards a tongue portion formed based on the cut line is formed; on the outer periphery surface in band, a plurality of grooves each of which is capable of temporally accommodating a projection-like blade formed on an outer periphery surface of the other roller and the tongue portion bent by the projection-like blade is formed; also on an outer periphery surface of the other roller in band, a plurality of the projection-like blades is formed; and on the outer periphery surface in band, a plurality of grooves each of which is capable of temporally accommodating the projection-like blade formed on the outer periphery surface of the one roller and the tongue portion bent by the projection-like blade, a long flat band-like sheet metal is continuously supplied between the pair of rollers, thereby substantially U-shaped cut lines are formed on a sheet metal by the projection-like blades, each of the tongue portions formed based on the cut lines is bent outwards to form a fin, each of portions surrounded by the cut line is opened, and thereby holes with a fin are formed.  
   
   
       6 . A part for an exhaust emission control device, wherein a spaced body that is formed by spirally winding the finned multi-aperture sheet metal described in the  claim 1  and has a net-like cross section is inserted in a casing.  
   
   
       7 . A method of manufacturing a part for an exhaust emission control device having a spaced body that is formed by spirally winding a finned multi-aperture sheet metal and has a net-like cross section in a casing, wherein the finned multi-aperture sheet metal described in the  claim 1  is spirally wound into a diameter smaller than an inner diameter of a casing followed by inserting in the casing.  
   
   
       8 . A method of manufacturing a part for an exhaust emission control device having a spaced body that is formed by spirally winding a finned multi-aperture sheet metal and has a net-like cross section in a casing, wherein the finned multi-aperture sheet metal described in the  claim 1  is spirally wound, both or either one of at least part of the finned multi-aperture sheet metal and part of the spaced body having the net-like cross section is bonded, and thereby a spaced body having a circular columnar net-like cross section is formed.  
   
   
       9 . A part for an exhaust emission control device, wherein a spaced body that is formed by spirally winding the finned multi-aperture sheet metal described in the  claim 2  and has a net-like cross section is inserted in a casing.  
   
   
       10 . A method of manufacturing a part for an exhaust emission control device having a spaced body that is formed by spirally winding a finned multi-aperture sheet metal and has a net-like cross section in a casing, wherein the finned multi-aperture sheet metal described in the  claim 2  is spirally wound into a diameter smaller than an inner diameter of a casing followed by inserting in the casing.  
   
   
       11 . A method of manufacturing a part for an exhaust emission control device having a spaced body that is formed by spirally winding a finned multi-aperture sheet metal and has a net-like cross section in a casing, wherein the finned multi-aperture sheet metal described in the  claim 2  is spirally wound, both or either one of at least part of the finned multi-aperture sheet metal and part of the spaced body having the net-like cross section is bonded, and thereby a spaced body having a circular columnar net-like cross section is formed.