Leftward-rotating pass roller of small-size mill, for rolling track shoe profile steel for bulldozer

The utility model discloses a leftward-rotating pass roller of a small-size mill, for milling track shoe profile steel for a bulldozer. The leftward-rotating pass roller comprises upper rollers (1) and lower rollers (2) and is characterized in that a symmetrical wedge-shaped groove (3) is arranged on the upper rollers (1) and the lower rollers (2), wherein one end of the wedge-shaped groove (3) is of an external arc-shaped surface (4), the other end of the wedge-shaped groove (3) is provided with an internal arc-shaped groove (5), and the two ends of the wedge-shaped groove (3) are oppositely buckled to form a T-shape pass. Compared with the currently-adopted rolled track shoe of a large-size mill, the leftward-rotating pass roller of the small-size mill, for rolling the track shoe profile steel for the bulldozer has the advantages of small equipment investment, small occupied area and low production cost. Because three T-shaped pass rollers are additionally arranged after the third rolling process of the sma