Rebar quenching and tempering production line

With an annual output of 20,000 tons, (ф7.1mm, ф9.0mm, ф10.6mm each one third). Among them: ф7.1mm line speed is 105 m / min, ф 9.0 mm line speed is 90 m / min, ф10.6 mm line speed is 65 m / min.

First, the steel bar quenching and tempering production line process

Raw material wire rod - mechanical rust removal - straightening - drawing diameter reduction - nicking - induction heating quenching - induction heating tempering - inspection - crimping finished product - packaging

Second, the steel bar quenching and tempering production line process plan

The heat treatment production line is a pipeline type system. The system block diagram is shown in Figure (1). The system can be divided into four parts: electric drive, induction heating, console, data acquisition and other ancillary equipment. The electric drive part consists of 4 motors (1 press machine, 1 tractor, 2 wire take-up machines) and steel bar straightening rollers. Each motor is driven by ABB's inverter; The heating part consists of 4 induction heating machines (2 sets of intermediate frequency power supply, wherein the power of 1# intermediate frequency power supply is P1=500KW, the power of 4# intermediate frequency power supply is P4=250KW. 2#, 3# power supply super audio power supply, power is respectively Composition of P2=320KW and P3=250KW). The 1# thermometer is used to measure the quenching temperature, the 2# thermometer is used to measure the tempering temperature, and finally the shear and line of the PC steel bar. The console is the main control station of the entire production line. The Simens series PLC and touch screen (TP270) jointly monitor the production line.

Third, steel quenching and tempering production line equipment selection

        1 , mechanical equipment

        A, line planes 2

B , press machine, straightening machine, tractor

        C , insulation pipe (length 3 meters) 2 pieces

        D , cooling sink (length 4 meters) 2 pieces

        E , gear shear (including dispensing device) 1 piece

        F , finished product receiving machine 2 pieces

Fourth , steel quenching and tempering production line heating power equipment (including sensors)

A , preheating thyristor intermediate frequency power supply ( 500KW/4KHZ ) 1 set

B , heating IGBT super audio power supply 320KW/30KHZ ) 1 set

C , quenching IGBT super audio power supply 250KW/50KHZ ) 1 set

D , tempered thyristor intermediate frequency power supply ( 250KW/4KHZ ) 1 set

5. Supporting equipment for steel quenching and tempering production line

A , thermometer (domestic, import alternative) one each for high and low temperature

B , centralized console (including 4 inverters , one set of PLC control system)

C , the connection between the control parts of the device