High precision rigid gas-permeable contact lens edge curve polishing lathe

A high precision rigid gas-permeable contact lens edge curve polishing lathe, comprising a machine body, wherein an upper end surface of the machine body is provided with a waste liquid tank;

• inside of the waste liquid tank is provided with a concave lens holder and a convex lens holder provided in parallel and capable of rotating circumferentially;
• two sides of the machine body are respectively provided with a first crank and a second crank;
• inside of the first crank and inside of the second crank are respectively provided with a first rotating spindle and a second rotating spindle, wherein the first rotating spindle and the second rotating spindle are provided with a polishing chuck at the front end and capable of rotating circumferentially;
• the first crank and the second crank rotate along the lateral surface of the machine body to form a match between the polishing chuck and lenses on the concave lens holder and the convex lens holder;
• a base is provided at the bottom of the machine body;
• a first crank and a second crank are respectively provided on two sides of the base;
• a positioning mechanism is provided on both the first crank and the second crank, wherein the positioning mechanism comprises an abutting pin matching the rotational direction of the first crank and the second crank and a numerical display unit displaying the position of the abutting pin.