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COLD ROLLING MILLS

  Cold rolling mills for producing aluminium and steel strips are operating today in many works of ferrous and non-ferrous metallurgy in the countries of CIS and abroad.
  When designing the rolling mills a package of software on automated calculation, design and optimization both of technological schedules and structural parameters of future equipment is used, a number of the following urgent tasks being solved:
  • fitting of rolling mills with hydraulic fast acting high-sensitive screw-down mechanisms as well as with high-efficient mechanisms of preliminary and prompt strip crown and shape control;
  • optimization of reduction schedules and utilization of high-efficient rolling lubricants;
  • development, research and bringing the new rolling processes facilitating the intensification of technological schedules and the finished product quality improvement to a commercial level.
Cold rolling mills

 

REVERSING-NON-REVERSING MILL
Reversing-non-reversing mill
  1. Coil setting device;
  2. Floating uncoiler;
  3. Spool stripper;
  4. Push rolls;
  5. Shears;
  6. Clamp-type roller guide;
  7. Working stand;
  8. Hydraulic screw-down mechanism;
  9. Thickness gauge;
  10. Stressometer roll;
  11. Coiler;
  12. Wrapper;
  13. Hold-down roller;
  14. Coil stripper;
  15. Load cell;
  16. Wedge mechanism.
  In the field of cold rolling of strips made of aluminium and its alloys we have developed an ingenious conception of the reversing-non-reversing mill.
  Rolling on this mill is performed in batches, in the same way as on the non-reversing mill, each coil of the batch being rolled in the reversing schedule first and then the whole batch being rolled according to the non-reversing rolling technology. The capacity of the mill is 10-15% higher than that of the non-reversing one due to the higher machine-handling time ratio. The mill operation permits the reduction of energy expenditure, extension of service life of a number of machines and mechanisms and considerable decrease of the required volume of mechanized stores for coils.
  The working stand of the mill is equipped with the hydraulic screw-down mechanism, the work roll positive and negative bending system, automatic plate-changing mechanism and wedge mechanism for maintaining the rolling level. The version of a six-high working stand is also possible. The coiler and floating uncoiler with the cantilivered drum and hinged support are connected to the double-motor drives ensuring maintenance of tensions within a wide range.
  The reducers of drives of the working stand, coiler and uncoiler are performed as speed reducers that provide minimun energy-intensity of the mill as a whole.
  The mill is fitted with the automatic system with the functions of rolling process control, diagnostics, setting of mill to roll the predetermined products, maximum possible automation of the back-up and work roll-change process as well as with the other systems ensuring the process of rolling.

Incoming billet:
  - strip thickness, mm 0.8 - 6
  - strip width, mm 1000 - 1600
  - coil weight, ton up to 22
Finished product:
  - strip thickness, mm 0.15 - 4
Four-high mill stand:
  - work roll diameter, mm 510 - 560
  - back-up roll diameter, mm 1500 - 1600
  - work roll barrel length, mm 1800
  - maximum roll force, kN 25000
  - maximum rolling speed, m/sec 25
Capacity, t/hr 60
  When constructing the cold-rolling mills for producing steel strips both for the new shops and the ones under reconstruction, there may be proposed a variant of transformation of the continuous coil rolling mill to the endless rolling mill and construction of pickling and rolling lines in future. This will allow for the customer to manufacture finished products within a minimum period and to construct a complex by stages with minimum expenses.

 

ROLLING MILL 1700

 

1700 mm Rolling Mill
Scheme of rolling mill 1700
  1. Double-drum uncoiler;
  2. Five-stand mill;
  3. Coiler with wrapper and coil stripper;
  4. Second coiler;
  5. Rotary shears;
  6. Two-position uncoiler;
  7. Butt-welding machine;
  8. Line coil ramp;
  9. Helical guides.
Strip section - width, mm 800 - 1550
Thickness of:
  - ingoing strip, mm 2 - 4
  - outgoing strip, mm 0.35 - 2
Coil weight, ton 15 - 35
Strip speed:
  - when going into the mill, m/sec 4 - 6
  - when going out of the downstream stand, m/sec 25
Working stands - roll barrels length:
  - back-up, mm 1700
  - work, mm 2000
Work roll diameter, mm 560/510
Back-up roll diameter, mm 1500/1430
Work roll axial shift, mm +150
Rolling force, kN 25000
Capacity, mln. t/year up to 2