Product Description The operation machine is used for flat welding, butt welding seam and internal and external longitudinal welding seam of cylindrical body and it can be fitted with roller stand for welding seam of internal and external circular welding seam. If it is fitted with positioner, different type of body can be made for different places of welding. Main body box type welding structure is treating by stress after welding and fine machining shall be made. The guide surface adopts precision grinding processing or ensures the sophistication and smooth running. The precision grinding rack is installed on crossbeam to guarantee its flexibleness and free expansion and contraction. The crossbeam's expansion and contraction, motor-driven turning of column and running of motor-driven trolley adopt AC frequency control of motor speed and the constant torque output the stat and the stop are very rapid. The raise and lifting of crossbeam adopt the constant speed type, thus its lifting is smooth, safe and reliable. The travel of trolley has two types as manual and electrical-driven. The former is applicable to light duty and those operation machines with small moving range. While the electrical-driven mode is good for heavy duty and those operation machines with large moving range. The turning supporter of column adopts German HRS technology, which has high precision gear with such advantages as flexible rotation, safety and reliability. The heavy duty machine is fitted with operation platform, which is easy for operation and regulation. The manual control box may realize the remote control.,