ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALTRBGCZEE....SK................JDIM350 (Ver 2.1 Jan 2001) 1620000/01304178EUROPEAN PATENT APPLICATIONA320050413EP02079262.820021016EnEnEn2001006860 U20011022JP20050413200515200304232003177 7B 21D 5/00 AdeHochleistung-Maschine mit thermischer Kompensation zum programmierten Biegen von Blechen mit konstantem BiegewinkelenHigh performance machine with thermal compensation for programmed sheet bending with constant bending anglefrMachine à haute performance à compensation thermique pour le pliage programmé des tôles avec angle de pliage constant3SALVAGNINI ITALIA S.p.A.0190093001104/EP-srVia Monticello di Fara, 42I-36040 Sarego (Vicenza)ITKunze, WolfgangGaumbergstrasse 824060 LeondingATMittler, Enricoet al00040772Mittler & C. s.r.l., Viale Lombardia, 2020131 MilanoITATBEBGCHCYCZDEDKEEESFIFRGBGRIEITLILUMCNLPTSESKTRALLTLVMKROSI20050413200515

A sheet metal bending machine is provided with a bending unit (8) moved by hydraulic cylinders (12, 15) with sliding pistons (20, 21). The cylinders (12, 15) are controlled by a closed loop control system comprising temperature measuring means (18) for measuring the cylinder temperature, position detecting means (19) for detecting the piston position and a control unit (17) for varying the rate of hydraulic fluid fed to the cylinders (12, 15) according to the measured cylinder temperature and the detected piston position.