At the METEC, Vollmer will be showing two innovations for the cold rolling of strips: The BFI roller for shape measurement now has a web-based evaluation system which simplifies integration into the rolling process. Furthermore, the company now supplies the laser-based thickness gauges of the VTLG series in versions for strip widths up to 1,480 mm and for thin foils.
Shape measurement with the digital BFI roller
For the measurement of the strip shape, Vollmer has digitalised the interface of the BFI roller. Communication with the mill process control system is via TCP/IP. Parameterisation of the software and the display in the new graphic design are completely web-based. Every device with a web browser in the same network as the shape computer – be it a PC, notebook, tablet or smartphone – can display the measurement data.
With individually manufactured diameters of between 200 and 600 mm, the BFI roller that Vollmer manufactures under the patent of the VDeH-Betriebsforschungsinstitut (BFI) can be integrated into practically any mill stand instead of deflector rolls. The outer surface of the roll body is absolutely homogeneous and can be reground on all standard roll grinding machines. The width of the measuring zones can be freely selected above 17 mm.
Laser-based thickness measurement with VTLG
Vollmer now supplies the VTLG thickness gauges with a measurement throat depth of up to 1,480 mm so that they can record transverse thickness profiles even on wide strips. The new systems work with the same high measuring resolution of 0.1 ?m as the smaller ones used on narrower strips. Also new is the VTLG 1420/20 for measuring on strips up to 20 mm thick; with an air gap of 215 mm, they measure with an accuracy of +/- 5 ?m.
Vollmer will also be presenting the VTLG 101/1 at the fair. It has been specially designed for the cold-rolling of foils with thicknesses between 0.003 and 2.0 mm, and is the only laser measuring system available on the market that can be installed in the immediate vicinity of the roll gap even when rolling foils. It operates with an absolute measuring precision of +/- 0,5 ?m.
Vollmer at the Metec 2023
D?sseldorf, 12 to 16 June 2023
Hall 4 / Stand D18
Keywords:Vollmer, Metec, cold rolling strips, BFI roller, thickness gauge, laser, strip widths, shape measurement, measuring precision, foils