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当前,国内外在设计冷弯型钢机组和成型方式时,有许多参数无法精确地确定,只能依靠经验数据和设想来推断,这给型钢生产带来种种弊端。据国外资料介绍,钢联在Darmstadt技术大学建造了一套冷弯型钢试验设备,专门对有关的特性参数进行测试,该设备目前已投入运行。其设计性能与标准的型钢机组相类似,但还具有如下设计特性:1.配有带钢活套由于具有可控的张力调节辊和电位器,带钢入口处无张力,以使测量结果不受开卷机和矫直机影响;2.成型机架单独传动成型机架的每根辊轴都装有可控硅直流电动机,电动机允许在四象限运行,用这种传动形式,能判断辊轴是由传动部件,还是由型材拖动的;3.可调节成型机架间距当测量各成型机架之间的张力时,为避免得出错误的数据,机架间的距离可根据孔型的横断面尺寸用齿条、齿轮和导向槽来调节;4.传动控制为对各辊轴进行单独的速度控制以及调节上下轴之间的速度比,该
At present, there are many parameters that can not be accurately determined in the design of cold-formed steel units and forming methods at home and abroad, which can only be inferred based on the empirical data and assumptions, which bring various defects to the steel production. According to foreign materials, steel joint at Darmstadt University of Technology to build a set of cold-formed steel test equipment, specifically for the relevant parameters of the test, the device has been put into operation. Its design performance is similar to that of a standard steel unit, but it also has the following design features: 1. Equipped with a strip looper Due to the controllable tensioning roller and potentiometer, there is no tension at the entrance to the strip so that the measurement results are not By the uncoiler and straightening machine effects; 2 forming frame individually driven forming rack each roller is equipped with SCR DC motor, the motor allows four-quadrant operation, with this form of transmission, can determine the roller shaft Is by the drive components, or by the profile drag; 3 adjustable molding rack spacing When measuring the tension between the molding racks, in order to avoid the wrong data, the distance between the rack according to the hole The cross-sectional size is adjusted by the rack, the gear and the guide groove; 4. The transmission control is to control the speed of each roller independently and to adjust the speed ratio between the upper and lower shafts.