STUDY AND PRACTICE ON ELIMINA-TING OVERCONSTRAINT TO REDUCE SENSITIVITY TO ERROR IN BLAST FURNACE TAPHOLE DRILL

摘要

Aimed at bad robustness of taphole drill of 1 200 m~3 blast furnace in a iron and steel works, overconstraint of the mechanism is analyzed, which is closed-chain six-bar mechanism. Then its structure design to eliminate overconstraint is discussed, and non-overconstraint basic links combinations and their configuration pattern are presented, combined with working characteristic and movement precision requirement of taphole drill, desired configuration pattern is selected. In this way, the machine runs smoothly, its efficiency is high.