Cold Rolling Mills
Cold Rolling Mills
Hertz Controls (India) Pvt. Ltd. is introducing our new Product Cold Rolling Mill. The Cold Rolling Mills are used for reducing the thickness of sheet/ strip/ coils of various metals to the desired thickness and to improve various properties like surface finish, strength, thickness tolerances and achieving required hardness like full hard, half hard, quarter hard etc.
Normally, these mills are made in 4Hi, 2Hi and 6Hi configurations
The machines are designed in compliance with advanced technological standards in order to achieve better formability, finish, precise dimensions and strength of the material. Various parts of the mill like the Rolls, Housings, Gear Box, Screw Down and drive system are matched properly to give optimum performance with minimal down time in maintenance and repairs.
In reversing cold mills the tension reels are placed on both ends of a single- or two-mill-stand arrangement. Due to the reversing rolling passes, production efficiency is lower than that of a tandem mill.
However, because the rolling parameters can be quickly changed for each coil, reversing cold mills are especially suitable for the small-lot production of various product types.
The size of the mill equipment is also smaller, which allows easier access to mill equipment and machinery for maintenance purposes. Due to their simpler design, reversing mills can be more easily stopped and restarted. They are also less expensive to purchase and operate.
REVERSING COLD ROLLING MILL
In reversing cold mills the tension reels are placed on both ends of a single- or two-mill-stand arrangement. Due to the reversing rolling passes, production efficiency is lower than that of a tandem mill.
However, because the rolling parameters can be quickly changed for each coil, reversing cold mills are especially suitable for the small-lot production of various product types. The size of the mill equipment is also smaller, which allows easier access to mill equipment and machinery for maintenance purposes.
Due to their simpler design, reversing mills can be more easily stopped and restarted. They are also less expensive to purchase and operate.
TECHNOLOGY
Depending on the product mix, a single-stand cold rolling mill can deliver rolling capacities of 100,000 to 400,000 t/a. Rolling schedules can be carried out with an even or odd number of passes to maximize mill availability and performance.
The Universal Crown Control mill (UCM mill) with work roll bending, intermediate roll bending, intermediate roll shifting and all straight roll application ensure enhanced flatness control.
Also strip flatness measuring equipment mounted at one or both ends of the mill combined with multi-zone work-roll cooling to meet the highest demands for flatness.
MAIN 6HI REVERSING COLD MILLS
- High production capacity and yield
-
Flexible, low-cost rolling of a wide range of
products, especially for small order lots - Tight strip thickness and shape tolerances
- Minimum off-gauge length
- High surface quality
- Second stand can serve as a skin pass mill
The cold rolling mill is used to pass hot-rolled coils produced from the hot rolling mill between two rotating rolls and produce products of the desired thickness. The cold rolling process provides a more refined surface, improved mechanical properties and excellent thickness product precision.
Cold rolling mills are largely divided into the TCM (Tandem Cold Rolling Mill) and the RCM (Reversing Cold Rolling Mill). In the TCM, material passes 5 or 6 rolling mills continuously to obtain the desired thickness, while in the RCM, material passes a single rolling mill multiple times.
Each rolling mill is designed to ensure extreme flexibility and to adapt the deformation process to the material, to optimize the mechanical characteristics of the end product.
A winning tool of the company is the total modularity of the multi-stand tandem rolling mills, customizable according to specific requests, even combining rolling and forming units to obtain rolled/formed products.
EXCELLENT STRIP QUALITY WITH:
Roll Eccentricity Expert
- For uniform and accurate strip thickness
Coil Eccentricity Expert
- Flatness Optimizer - Model based Automatic Flatness control
- For uniform and accurate strip thickness
Chatter Block Controller
- Mill Chatter Monitoring with automatic process speed adaptation
- For Reversing cold mills a highly optimized solution is available matching all kind of mill stand configurations. According to the complexity of production a look-up table or rolling model based mill setup can be chosen.
AUTOMATION: COMPLETE AUTOMATION AND PROCESS CONTROL FOR REVERSING COLD MILLS
Plant productivity and product quality are substantially depending on the quality of plant automation, process control, and available process optimization functions. To get the best performance out of a plant, HERTZ CONTROLS provides add-on specific optimization solutions for further improvement of production efficiency and strip quality, besides standardized high performance automation system.
