Abstract
This paper takes the long diameter geological drill pipe used in coal mine as the research object. The internal flash cleaning technology which remains in the drill pipe hole after the internal flash turning is studied. A hand - held pneumatic internal flash cleaning device was designed to replace the original manual way of removing iron filings. It greatly reduces the labor intensity of workers, improves the working environment, and shortens the cleaning time of flash inside a single drill pipe. This device greatly improves the work efficiency and makes it safer and more reliable to use.
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