Annular piece tooling for rim of construction machinery wheel

The utility model relates to an annular piece tooling for the rim of a construction machinery wheel, which comprises an upper punch, a lower punch, a core roller, a main roller and a backing ring; the upper punch is a reversed truncated cone; the lower punch consists of a small truncated cone section and a large truncated cone section which are arranged coaxially in sequence from top to bottom to form a whole body; the core roller consists of a cylinder section and a truncated cone section which are arranged coaxially in sequence from top to bottom to form a whole body; the inside of the main roller is provided with a central hole; the outer edge of the main roller is provided with an annular groove matched with the shape of the outer wall of a wheel rim annular piece needing to be produced; the inside of the backing ring is provided with a bed opening; the backing ring consists of a backing ring truncated cone section and a backing ring cylinder section which are arranged coaxially in sequence from top to bo