two slitter heads – XIONGJIN MACHINERY – Slitting & Cut-to-Length Line Machine Expert

Levelling and Cut to Length Lines

FIMI Machinery has commissioned lines able to level high-strength steel coils up to 2.000 N/mm2 yield strength, achieving perfect levelling quality and a level of internal tension dimension to meet the special demands of laser cutting.

These performances of excellence are possible thanks to the application of a levelling philosophy, which is based on the progressive contribution of several levellers in series, adjusted to generate a kind of tension levelling.

Depending on the production range, FIMI’s levelling and cut-to-length lines are equipped with min. two machines, a pre-levelling and a levelling machine, up to a maximum of three machines, i.e. pre-levelling machine with two levelling machines working in cascade.

Main Features

0,1 - 25,4 mm

Material thickness range

2.800 mm

Maximum strip width

18.000 mm

Maximum sheet length

2.000 N/mm2

Maximum tensile strength

50 ton

Maximum coil weight

Patents

Torque Dynamic Distribution System

This is a FIMI patented system, already applied on several lines, necessary for levelling both high strength steel strips and non-ferrous strips with a very delicate surface.

Media

Product range

For the use in the automotive sector

The levelling and cut-to-length lines for automotive applications are specially designed to meet the surface quality requirements and the tight sheet size tolerances demanded by the automotive sector. Typical thicknesses range from 0.3 to 3.5 mm, while the material processed is both steel and aluminium, including high strength material.

For Trapezoidal and Multiform Sheets

This type of cut-to-length line is equipped with a special and innovative rotary shear with tilting die-holders and an automatic die changing device.

This solution allows the assembly of equipment for various types of cutting (orthogonal straight and/or inclined for trapezoidal sheets or straight sheets for various shapes). Used for both carbon steel up to 3.0 mm thick and aluminium up to 5.0 mm thick.

For "Multi-Blanking" Applications

These are combined line configurations, equipped with a slitting shear for cutting into strips (max 5 strips) and a subsequent cutting shear for cutting the strips into sheets.
Typical applications are the household appliances and automotive sectors.

For High-Strength Steel (HSS) and Ultra High-Strength Steel

The levelling and cut-to-length lines for high-strength (HSS) and ultra-high-strength (UHSS) hot-rolled steels were successfully developed to meet the growing market demand to reduce the material thickness and, at the same time, increase its strength. The traditional configuration of these plants would have never been able to process such HSS and UHSS material; therefore, FIMI developed a special patented system, TDDS® for the levelling units and a levelling philosophy that allowed the required performance to be achieved.

For Heavy Gauge Thickness (up to 25.4 mm)

Cut-to-length lines for hot-rolled high-strength steels are becoming increasingly popular in recent years, due to the growing demand for heavy sheet metal for structural applications, such as wagons, ships, etc. These lines also make use of the patented TDDS® system developed by FIMI for its levellers to gently remove internal material tension. In some special cases requested by customers, an in-line Skin Pass Mill can be added to the line to increase surface quality.

For Tin plate and Pre-Painted Sheet Metal

They are characterised by solutions aimed at the highest productivity (process speeds up to 180 m/min), maximum compliance with the strip surface and the production of sheets with very tight geometric tolerances in width, length and squaring.

The line consists of:

Entry Group

Coil Stocking and automatic loading with vertical and horizontal centring.
Automated strap removal devices, both off-line and on board of the decoiler.
Devices of various configurations for opening the strip head.
Static and dynamic strip centring with head straightening.
Cropping, automatic dividing and scrap handling.

Trimming

Edge trimming from 0,1 a 25,4 mm.
Possibility of integration with central cut.
Scrap winding devices, both in foil and coils.
High efficiency scrap cutters.
Customised solutions for scrap handling.

Levelling

Levelling is at the heart of the technological process of cut-to-length lines and it is the function where FIMI has dedicated the most research and development activity, defining innovative solutions that represent the state of the art in the sector and are essential to be able to process the most modern materials, developed by the most advanced steel mills.

Cut to Length

Different types of shears are available for cut-to-length lines, depending on the type of material to be processed and the production capacity required.

Fixed and oscillating hydraulic shear.
Fixed quick shear with flywheel and brake/clutch.
Drum shear “Rotronic”.
Rotary shear “Vectronic” for strips up to 8mm thickness.
Rotary shear “Transtronic” for strips up to 16mm thickness.
Rotary shear for trapezoidal or shaped sheets.
Flying shear up to 25,4 mm.

Stacking

Vacuum stacker.
Magnetic stacker.
Air cushion stacker.
Rackets stacker.
Air cushion and rackets stacker.
Bomb doors stacker.
Stacker for trapezoidal sheets.

Complementary Devices

Paper Recoiler.
Automatic Plastic Film Applicator.
Paper Appplicator.
Book Opening Levelling Cassette.
Tool handling systems.
Multiple Brushing Systems.
Cassette tilter for Heavy Gauge Levellers.
Cleaning system for levelling rolls.
Dimensional measurement systems and sheet flatness.