Cold Rolling Mill

In: Business and Management

Submitted By rickyagarwal
Words 5872
Pages 24


Continuous Pickling Line No. 1


1. COIL RAMP : Coils are brought by crane and placed on the coil ramp .Coil ramp is provided with three coils stops which are operated by compressed air through hand operated levers. Side guides on the coil ramp are adjusted manually to the coil width +100 mm. 2. COIL ADJUSTING DVICE: The coil adjusting device is equipped with two parallel adjustable guide plates and 2 carrying rollers. They serve to bring the coil to the center line and for tightening the outer laps of the coil. Hydraulically operated coil ejector feeds the coil to the uncoiler supporting rolls. After centering the coil on the coil adjusting device, coil strap is cut and the head end of the coil is straightened with the help of a wooden block for easy feeding into uncoiler. 3. UNCOILER, SCALE BREAKER AND LEVELLER: This unit comprises of following equipments:- i) Supporting Rolls(2) are driven electrically. These are used to support the coil after it is ejected from coil positioner and to lift to the center-line of the uncoiler mandrel. Supporting rolls are raised and lowered hydraulically. ii) SCALE BREAKRS: In order to facilitate pickling in the pickling tanks, the cracking of scale becomes essential, upper layers of scale on hot rolled strip consist of Fe2O3 and Fe3O4 which act very slowly with sulphuric acid. After upper…...

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