Precision, performance, reliability – these are the strong points of the ProfiGrind machines, appreciated by WaldrichSiegen customers all over the world. Taking into account changing market conditions and requirements, we have constantly further developed our products and have become technology leader. To date, more than 1,600 roll grinding and texturing machines from WaldrichSiegen are being operated in roll shops worldwide.
The roll grinders of the WaldrichSiegen ProfiGrind series are renowned for their very rigid design. All structural components are made of cast iron and machined in-house at tolerances within the micrometer range to ensure an extremely long lifetime, maximum reliability, stability and excellent damping characteristics.
The consistent integration of hydrostatic guideways provide for an almost wear-free operation, zero backlash, unsurpassed damping characteristics and high stock removal performance, excellent thermal characteristics and maximum precision.
With its modular structure, the WaldrichSiegen ProfiGrind series offers a perfect solution for every requirement and all demands.
The WaldrichSiegen X-axis design is industry advancement in terms of stiffness and accuracy. The grinding spindle with hydrostatic U-axis provides for wear-free operation throughout the complete speed range and guarantees the highest precision. For grinding of specific roll curves with a large variety of diameters, WaldrichSiegen has developed the B-axis. This patented concept ensures that the grinding wheel is always positioned vertically to the corresponding tangent of a curve. Thus, infeed marks are eliminated. The cast iron upper carriage of the ProfiGrind machines is designed for maximum firmness. The wear-free Master-slave drive of the Z-axis prevents tilting at the reverse point of the grinding wheel and guarantees the highest long-term precision.
The headstock housing of the ProfiGrind machines is designed for maximum stiffness. It is made of cast iron and is ribbed to yet further increase the firmness. Premium-quality bearings and components ensure the highest machining accuracy.
The tailstock housing, a closed construction made of ribbed cast iron, in conjunction with the generously dimensioned roller bearings ensure excellent run-out accuracies. The tailstock quill is exactly positioned via motor-driven operation and therefore allows for an exact pressure adjustment. Spring cups ensure a constant and safe load accommodation throughout the machining process. WaldrichSiegen optionally equips the tailstock with hydrostatic bearings.
Also in terms of steady rest design, WaldrichSiegen offers customized solutions geared to specific customer requirements:
The machine beds feature maximum bending and torsional stiffness and optimal load introduction into the foundation. In addition, precise and wear-free guidance of the lower carriage, as well as, exact positioning of the steady rests, tailstock and peripheral equipment is guaranteed.
Hydrostatic guideways and Master-slave drives are synonyms for dynamic stiffness and excellent damping characteristics of all carriage side components. The Master-slave concept for longitudinal drive and the ball screw for cross-adjustment guarantee the highest positioning accuracy.
In conjunction with the appropriate drives for all axes and main spindle, state-of-the-art measuring and control technology manufactured within our group of companies ensures ultimate reliability and precision along with a maximum degree of automation.
Quite often, roll surface defects cause serious interruptions of operation in rolling mills which result in considerable downtime with corresponding consequential damages. The integration of crack detection devices into the roll grinder enable the early detection of cracks and thus help prevent such outages. Eddy current systems in conjunction with ultrasonic systems detect structural changes, both on the roll surface, as well as, sub-surface. The roll defects are graphically displayed via the HCC/KPM HMI system.
In terms of roll handling, automated roll shops provide for considerable time savings. The automatic WaldrichSiegen roll loading/unloading system minimizes the need for manual intervention and is also suited for the handling of hot strip work rolls in chocks. Functions and tasks of a chock rotating/swiveling device can be carried out by the automatic loading/unloading system.
Further options to enhance the degree of automation include automatic roll neck detection for coupling of rolls with the headstock, additional measuring procedures, for example online roughness measuring devices or measurements with the Roll Surface Inspection System RSIS. In terms of corrosion protection we offer equipment for automatic drying and oiling of rolls.
WaldrichSiegen roll grinders feature cutting-edge technology and excel in precision, performance, reliability and long service life. With a focus on individual customer orientation, the machines offer a high degree of flexibility: