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The tai-wagging internal screw rolling machine is the domestic relatively advanced equipment, it superior advantage is simultaneously rolling the internal screw and drawing the external
diameter of the tube. The steel balls of the through automatic internal screw machine are acted by the adapter sleeve, move forward under the cylinder pushing force; and the shifting yoke
reversely pushes the adapter sleeve forward, the steel balls move to the center, to extrude the tube external diameter and form the internal screw; and the ideal dimension is drawn by the
external drawing module. With the pneumatic and hydraulic devices, the automatization level of this equipment is at the absolute leading position in China.
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