Primetals Technologies introduces its most advanced heavy-gauge laser welder performing welding and cutting using asolid laser source. This laser welder called LW21 is designed to provide a very high performance level for a wide range of grades including the stainless steel grades. Easy and low maintenance thanks to beam transmission via fiber optic cable making the troublesoom mirror reflected transmission are past history. Repeatable and constant cutting performance and high level of availability are achieved thanks to the choice of laser cutting. The other advantage of the latter is the compactness of the machine which enables an easy installation in existing lines with minimum field work.
In most cases the equipment comprises two-high mills with one work roll diameter. The equipment integrates positive and negative bending blocks, an automatic pass-line adjustment device, a quick automatic work roll change system, efﬁcient roll cleaning tools and high-performance automation.
Tension leveling stands include several six-high leveling cluster assemblies on which the strip is subjected to elasto-plastic deformation under controlled elongation to stretch the strip’s longitudinal structures to equal length and to eliminate residual crossbow and coilset. Tension leveler entry and exit tension bridles can be driven with different systems depending on application. It is often desirable to combine the skin-pass and tension leveler with an intermediate tension bridle in a versatile system to facilitate the production of different types of high-quality strip.
Fig.1- Inline Skin Pass Mill | Fig.2- Medium tension leveler TL21M (wet process) | Fig.3 Scale breaker (Wet process)
The scale breaker is composed of a stand, a dust collection system (wet or dry process) and entry and exit tension bridles with their respective drive systems. The strip in the stand is subjected to a series of alternating ﬂexions under tension on the work rolls. This results in an elongation of the strip and corrects ﬂatness defects. The scale breaker is also equipped with a quick work roll changing device which operates when the line is running, as well as a complete hooding of the stand to prevent pollution to the surroundings, and back-up rolls with built-in air blowing systems to prevent dust penetration.
Primetals Technologies innovative side trimmers dedicated to stainless steel applications are called ST21M or ST21H. Coming in turret or single head type, these machines can also feature several options, such as the Dynamic Width Adjustment (DWA) and/or the EdgeMon system. Our single-stand or turret or dual shifting scrap choppers SC21 are designed and manufactured to ensure the highest quality cutting and strongest availability. The pertinent choice of drum diameter and number of knives ensures the longest running time available in the market. Close association of side trimmer and SC21 scrap chopper is a guarantee for a best scrap disposal and lowest cobble ratio.
In the high-added-value stainless steel market, the SIAS automated surface inspection system is a key component of global equipment, essential to high quality and productivity. SIAS® can be applied to bright annealing lines and annealing and pickling lines as well as integrated stainless steel lines, skin-pass mills and tension levellers. SIAS® will alarm operators about all surface defects (harmful defects for the lines and/or unacceptable defects for required quality).
The TCOptimizer offers the means to secure the production by keeping an eye on all the signals of the whole metallurgical route (from casting to downstream process) and triggering just-in-time alarms against performance degradation regarding equipment conditions, process and product quality. It enable an automatic process follow up, a direct product quality estimation thanks to embedded metallurgical models and just in time alarms for immediate actions to reach final quality requirements.