公开(公告)号：EP0590682B1

公开(公告)日：1998-01-21

申请号：EP93115892.7

申请日：1993-10-01

申请人： HITACHI, LTD.

发明人： Kajiwara, Toshiyuki ,  Yoshimura, Yasutsugu ,  Sakanaka, Takao ,  Yasunari, Shinichi ,  Takakura, Yoshio ,  Kaga, Shinichi

IPC分类号： B21B27/10 ,  B21B13/02

CPC分类号： B21B27/10 ,  B21B13/023 ,  B21B37/007

公开(公告)号：EP0590682A1

公开(公告)日：1994-04-06

申请号：EP93115892.7

申请日：1993-10-01

申请人： HITACHI, LTD.

发明人： Kajiwara, Toshiyuki ,  Yoshimura, Yasutsugu ,  Sakanaka, Takao ,  Yasunari, Shinichi ,  Takakura, Yoshio ,  Kaga, Shinichi

IPC分类号： B21B27/10 ,  B21B13/02

CPC分类号： B21B27/10 ,  B21B13/023 ,  B21B37/007

摘要： A lubricant is supplied from headers (38) of lubricant supply units (5) onto surfaces of back-up rolls (3) at locations spaced from contact positions between a pair of work rolls (2) and a pair of back-up rolls (3). The headers (38) each include a lubricant spray nozzle (41) for spraying the lubricant under a pressure not lower than 3 kg/cm², a header cover (42) for confining the lubricant sprayed from the lubricant spray nozzle (41), an oil return line (44) for returning the surplus lubricant, and seal members (43) made of flexible material such as rubber. The work rolls (2) are provided with water wiping plates (6), and the back-up rolls (3) are also provided with water wiping plates (7). In a work rolls crossing type mill thus arranged, water films of cooling water deposited on the roll surfaces are removed to prevent the cooling water from mixing into the lubricant. Even if the water films are not totally removed, it is possible to surely plate out the lubricant for reliably lubricating between the work rolls (2) and the back-up rolls (3). Raw lubricant oil of the lubricant meets the following requirements; (a) the coefficient of friction between said work rolls (2) and said back-up rolls (3) is in the range of 0.04 to 0.1, (b) the viscosity is not larger than 80 Cst. at 40 °C, (c) mineral oil and synthetic ester not less than 5 % are contained as base oil, (d) a fatty acid in the range of 0.03 to 0.5 % is contained as an oiliness enhancer, (e) an extreme pressure additive not less than 0.1 % is contained, and preferably, (f) a surface active agent not larger than 0.5 % is contained as emulsifier.

摘要翻译： 润滑剂从润滑剂供应单元（5）的集管（38）供应到备用辊（3）的表面上，与位于一对工作辊（2）和一对支承辊 3）。 集管（38）各自包括用于在不低于3kg / cm 2的压力下喷射润滑剂的润滑剂喷嘴（41），用于限制从润滑剂喷嘴（41）喷射的润滑剂的集管盖（42） ），用于返回剩余润滑剂的返回油路（44）以及由诸如橡胶的柔性材料制成的密封构件（43）。 工作辊（2）设有水擦拭板（6），后备辊（3）还设有水擦拭板（7）。 在如此布置的工作辊交叉型磨机中，去除沉积在辊表面上的冷却水的水膜，以防止冷却水混入润滑剂中。 即使没有完全去除水膜，也可以确实地平滑出润滑剂，以在工作辊（2）和后备辊（3）之间进行可靠的润滑。 润滑油原润滑油符合以下要求; （a）所述工作辊（2）和所述备用辊（3）之间的摩擦系数在0.04至0.1的范围内，（b）粘度不大于80Cst。 （c）作为基油含有矿物油和不低于5％的合成酯，（d）作为油性增强剂含有0.03〜0.5％的脂肪酸​​，（e）极端的 含有不低于0.1％的压力添加剂，优选（f）不含0.5％以下的表面活性剂作为乳化剂。