论文部分内容阅读
轧钢厂常使用转盘来实现轧材的旋转和升降运动,其运动是依靠安装在转盘旋转主轴上的圆柱形辊子(直径φ155mm、长70mm)沿着辊板的螺旋面滚动而实现的。辊板形状如图1所示,圆环端面有四段螺旋面。我们用铣床挂轮铣的方法加工辊板螺旋面。工件定心胎夹紧在φ500mm的迴转工作台上;用一专用挂轮架使迴转工作台匀速旋转运动;铣床工台作匀速升降运动,来完成一个螺旋面的铣削。这种加工方法生产较率高,光洁度达▽6。但用此法加工出的辊板的平面段上是沿辊子母线全接触,在螺旋面上形成内圆处局部线接触,外圆处有间隙,而且螺旋升角愈大,外圆处间隙愈大。在螺旋升角为17°39′的BC段间隙竟达1mm多。
Rolling mills often use a turntable to rotate and lift a rolling stock by rolling along a helical surface of a roll plate with a cylindrical roller (φ155 mm in diameter and 70 mm in length) mounted on the rotating spindle of the turntable. Roll plate shape shown in Figure 1, the ring has four sections of helical surface. We use the method of milling wheel drive milling roller spiral surface. The workpiece centering tire is clamped on the rotary table with a diameter of φ500mm; the rotary table is rotated at a constant speed with a special rack; the milling machine workbench is used to make uniform helical milling. This method of processing more productive, finish ▽ 6. However, the flat plate of the roller plate processed by the method is fully contacted along the roller generatrix, and the local line contact is formed on the helical surface at the inner circle. There is a gap at the outer circle, and the larger the helix angle is, the more the clearance at the outer circle Big. In the helix angle of 17 ° 39 ’BC section as much as 1mm gap.