Wheel spinning die and die releasing device

An apparatus comprising an upper die, a connecting sleeve, slide blocks, a lower die, a central connecting block, and an upper tail top, wherein the connecting sleeve is fixed on an upper main shaft of a spinning machine, the connecting sleeve is fixedly connected with an upper surface of the upper die, and the lower die is fixed on an upper end of a lower main shaft of the spinning machine;

• a circular groove is formed in middle of the lower die, and a cylindrical central connecting block is fixed in the middle of the circular groove;
• a diameter of the central connecting block is smaller than a diameter of the circular groove, and the diameter of the central connecting block is larger than a diameter of a portion of a wheel blank contacting the central connecting block;
• an upper surface of each slide block, a side wall of the side, facing a rim, of each slide block, an upper surface of the central connecting block and bottom surface of the upper die are adapted to shape of the wheel blank, and an upper end edge of the side, facing the rim, of each slide block is provided with an arc flange;
• a plurality of identical slide blocks are uniformly distributed in a circumferential space between the central connecting block and the circular groove, and the plurality of identical slide blocks are connected end to end to form a circular ring;
• bottom of each slide block is provided with arc grooves with right-angled longitudinal sections on a side facing the center of the wheel blank and a side facing the rim of the wheel blank;
• the slide blocks are inserted into an annular groove between a side wall of the circular groove at the upper end of the lower die and the central connecting block, and the side wall of the circular groove and the central connecting block can be respectively clamped in the arc grooves on both sides of the bottom of each slide block;
• during spinning, each arc flange is clamped at a joint of an outer wheel lip and a rim under a spoke;
• and during die releasing, the slide blocks can move up and down together with vertical movement of the wheel blank;
• a circular blind hole is formed in middle of the central connecting block, the upper tail top is fixed in the upper die, and a lower end of the upper tail top can be inserted into the circular blind hole of the central connecting block after passing through a central hole of the wheel blank along with the downward pressing of the upper main shaft of the spinning machine.