| The process of producing and processing large pipe by expanding pipe machine
The prominent quality problems of large diameter seamless pipe of φ 650mm thermal expansion unit are compared with several sizing forms, and the advanced frame two-roll single DC motor drive belt rapid roll change sizing machine and the sizing process of large diameter seamless pipe of φ 650mm thermal expansion unit are discussed and analyzed. On the basis of fully considering the production process characteristics of hot-dip galvanizing machine, the flatness quality of pipe expander products, the stability of zinc layer and the uniformity of zinc flower in the leveling process, taking the uniform transverse distribution of tension and rolling pressure before the strip export as the objective function, A set of automatic comprehensive setting model for core process parameters such as elongation, forward and back tension of hot dip galvanizing machine was established and applied to the setting of parameters of a 1800 cold rolling 3^#CGL hot dip galvanizing machine.
The pipe expanding machine is designed for the shortage of large diameter seamless steel pipe production and incomplete specifications. The equipment is double cylinder or four cylinder parallel speed pushing machine, pump station valve platform adopts integrated form. According to the outer diameter and length of the expanded steel pipe, set the power of the intermediate frequency heating power supply, the thrust and stroke of the oil cylinder.
Pipe expanding machine equipment is composed of the following components: hydraulic push machine host, automatic loading and unloading structure, hydraulic pump station, pipe matching device, operation table, motor control cabinet, intermediate frequency power supply, compensation capacitor, water cable, intermediate frequency coil adjustment frame, reactor.
The pipe expanding machine is a double cylinder parallel speed hydraulic pushing machine, and the valve platform of the pump station adopts integrated form.
The pipe expanding machine feeds the steel wire rope and pushes the pipe through the steel wire rope wheel to reciprocate and send the original pipe to be expanded into the equipment.
The intermediate frequency power supply of the pipe expander is installed in the front end of the equipment, and the intermediate frequency induction coil is placed on the coil adjustment rack, and the coil can be adjusted up and down, before and after. The tube expanding core head mold and the original tube expanding, turn on the water pump and the intermediate frequency power supply, adjust the intermediate frequency power, you can heat the tube expanding core mold and the pipe, and slowly push the pipe forward. The pipe will produce plastic deformation as the heating temperature rises to a certain temperature, and push forward along the outer diameter of the mandrel, and the pipe expanding can be realized.
The controllable silicon of intermediate frequency power supply of pipe expander, intermediate frequency coil, reactor and other parts need cooling tower pool, etc.
The electrical control part of the pipe expander is installed in the main control cabinet. The travel switch is installed at both ends of the pipe expander. After the push plate is in place, the machine will stop automatically.
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