摘要
通过建立滚切剪空间剪切机构运动轨迹方程,在滚切模拟基础上,以采用非对称、负偏置新型结构的某大型钢铁有限公司3000mm单轴双偏心定尺滚切剪为计算模型,对非对称前后的钢板剪切力、连杆力、连杆水平分力、保持剪刃间隙恒定的后滑道推力进行了分析对比,并推导了非对称公式。非对称曲柄结构能够降低滚切过程中的连杆水平分力,增大最大剪切力时刻连杆的有效驱动力,降低刀弧对钢板刃口的挤压。理论分析结果及现场钢板剪切质量表明:非对称、负偏置结构是提高剪切机剪切能力提高刀片寿命,降低剪刃磨损,提高剪切质量,保证剪刃间隙恒定的重要手段。
Based on rolling-cut simulation,using a kind of 3000 mm cut-to-length of single-shaft and double eccentricity rolling shear from such a large-sized company,which adopts a new structure of asymmetric feature and negative bias,as the calculating model by establishing motion path equation of spatial shear mechanism,comparing with the steel shear forces,link forces and horizontal link force compo-nents with or without asymmetric feature,the asymmetric formulation is deduced.Such asymmetric crank structure can decrease horizontal force component between the linkages during rolling-cut process,increase the effective drive force on links while it comes to the maximum shear force,and decrease the extrusion of blade arc on steel edge as well.Theoretical analysis and steel-shearing quality at site indicate that asymmetric and negative bias is an important and efficient way to prolong the lifetime of blade,to decrease blade wear,to improve shearing quality,and maintain the constant clearance between blades.
出处
《机械设计与制造》
北大核心
2010年第8期66-68,共3页
Machinery Design & Manufacture
基金
新世纪人才支持计划(NECT-05-0268)
山西省科技攻关项目(2006031174)
山西省科技成果推广项目(2007071071)
关键词
滚切剪
负偏置
剪刃间隙
剪切质量
Rolling shear
Negative bias
Clearance between blades
Shear qualit
