AUTOMATIC CIRCULAR CUTTING DEVICE FOR STEEL PIPE END

摘要

PURPOSE:To perform circular cutting of a steel pipe end with high efficiency and high accuracy by arranging a cutting mechanism to that of an angle adjustment system in every direction as a column and cutting unit lifting system. CONSTITUTION:The axial center (a) of a driving shaft 50 is aligned with a pipe axis (b) of a pipe P to be cut. A cutting angle, a vertical angle, a vertical stroke, etc., of a cutting torch 62 are then adjusted and in addition, a rotary rod 58 is expanded and contracted and a cutting rotating radius is adjusted. In addition, an arm rod 60 is parallel to the pipe axis (b) and an interval between the cutting torch 62 and base metal is set at a prescribed place. A clutch power source is then cut off and the rotary rod 58 is made free and rotated manually and the interval between the torch and the base metal is confirmed and further, the presence or absence of contact between the rod 58, etc., and other set materials is confirmed. The cutting alignment and the interval between the torch 62 and the base metal are then subjected to fine adjustment properly by the lateral adjustment and vertical adjustment of a torch holder 61 to complete every adjustment. The automatic cutting is then started and a non-stage transmission 49 with a speed reducer incorporated in the column is driven and transmitted to the driving shaft 50 and the cutting torch 62 is rotated together with the rotary rod 58 to cut the end of the pipe P.