Ensuring high-quality machining of the inner surface of the electric welded pipes during deburring in the mill line

The paper presents results of reviewing literary and patent sources on design and technological solutions in grinding (notching) the internal burr in the electric welded pipes production. Based on the review data, optimal designs were determined of the internal deburring stabbing tool located on the deburring machine rod. Studies were carried out on stabbing the internal burr in the production of pipes with the diameter of 60.3...73.0 mm in the pipe electric welding unit line using various methods and design solutions. Quantitative indicators were analyzed of designs of the internal deburring machine rods with the deburring function. Based on results of the practical studies of various methods for dividing the internal burr into parts in the mill line, the optimal option for designing the internal deburring machine rod was determined. This design makes it possible to reduce the number of emergency stops at clogging with long segments of the remote burr by the mill transport line, increase coefficient of the equipment (mill) effective operation and the yield of the useful products, as well as ensure the high-quality washing out of small segments of the removed internal burr inside the pipe with a high-pressure water jet at the flushing operations.