Chopping blade of a forage harvester and method for producing said chopping blade

A chopping blade (10) of a forage harvester,

• having a basic body (11), which has a fastening portion (12) for fastening the chopping blade (10) to a chopping drum and a cutting portion (13) which is angled in relation to the fastening portion (12) and is configured for harvested crop to be chopped,
• having at least one crop-guiding element (15) which is a roll profiling element and is fastened to the fastening portion (12) and is configured for guiding chopped harvested crop, wherein a guide surface (16) of said crop-guiding element has a contour which is curved at least in sections and begins at a distance from the one transition edge (14) between the fastening portion (12) and the cutting portion (13), characterized in that
• a distance (a) between the beginning of the guide surface (16) of the at least one crop-guiding element (15) and the transition edge (14) between the fastening portion (12) and the cutting portion (13) of the basic body (11) is between 4 mm and 8 mm,
• the guide surface (16) of the at least one crop-guiding element (15) runs rectilinearly adjacent to the beginning of said guide surface in a first portion (18) with a length (B) between 4 mm and 8 mm, wherein the first portion (18) of the at least one crop-guiding element (15) encloses an angle (α) between 18° and 22° with the fastening portion (12) of the basic body (11),
• the first portion (18) of the at least one crop-guiding element (15) merges into a concavely curved second portion (19), the radius of curvature (Rx) of which is between 21 mm and 25 mm and which has a wrap angle (β) between 29° and 33°,
• the second portion (19) of the at least one crop-guiding element (15) merges into a concavely curved third portion (20), the radius of curvature (Ry) of which is between 18 mm and 22 mm and which has a wrap angle (γ) between 24° and 28°,
• the third portion (20) of the at least one crop-guiding element merges into a convexly curved fourth portion (21),
• a maximum height (c) of the crop-guiding element (15) is between 24 mm and 30 mm starting from the fastening portion (12) of the basic body (11).