| Introduction to four-cylinder two-step pipe expanding machine
The equipment is an improved type of double cylinder two-step pipe expanding machine. For the expansion of large-diameter thick-walled steel pipes above φ630 ~ φ1020, it is necessary to enlarge the steel pipe hole of the support plate and push plate of the equipment itself, and make the last steel pipe expand backward. The through-hole is at least φ750 ~ φ1050, because the thrust generated by the parallel twin cylinders is on a horizontal center line, it can not meet the up-down balance of the equipment expanding pipe point. Due to the downward movement of the thrust point when expanding the pipe, the push rod between the cylinder rod and the two push plates of the equipment will bend upward, so that the cylinder rod is severely worn and the service life is reduced. In order to overcome the above weaknesses, a four-cylinder push pipe expanding machine is designed. The thrust force of the four cylinders of the pipe expander is changed into a square frame point, which improves the stability of the equipment, increases the freedom of the pipe expander equipment in operation, and improves the equipment life and production efficiency.
The product set interchanged cone die hole enlargement technology, medium frequency induction heating technology, technology in one page, with its reasonable technology, low construction investment range of raw materials and products specifications suitability, flexible variable low input of production batch adaptability to replace the traditional steel pipe industry drawing hole enlargement technology, became the resolve the shortage of large diameter seamless pipe at home and abroad, Large and medium caliber welded pipe specification series is difficult to perfect the indispensable important production capacity. The composition of mechanical equipment of pipe expanding machine: pipe expanding machine mainly includes: frame, main oil cylinder support plate (including main oil cylinder), automatic feeding mechanism, discharging roller table, mold support, intermediate frequency coil adjustment frame, intermediate frequency power supply, electrical control system and so on.
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