Grinding and polishing machine for inner wall of large square medical stainless steel tank and control method of grinding and polishing machine

The invention discloses a grinding and polishing machine for the inner wall of a large square medical stainless steel tank. A sliding rail and a single-row chain are fixed to a base. The driving spindle is rotationally connected to the middle of the base; the driving motor is fixed on the base and is in transmission connection with the driving spindle; the bottom disc guide rail mechanism, the middle disc mechanism and the top disc mechanism are sequentially connected to the driving main shaft through keys from bottom to top. The multiple grinding and polishing sleeve components are evenly distributed on the bottom disc guide rail mechanism, and the bottoms of the grinding and polishing sleeve components are matched with the single-row chain through chain wheels and limited through sliding rails. The multiple supporting shaft components correspond to the grinding and polishing sleeve supporting components one to one, are fixed to the bottom disc guide rail mechanism and are used for supporting the grinding an