划线工作是机械行业的一项重要工作。通常在工件平面划椭圆线时,按椭圆作图法进行,这种作图法工效较低,准确性难以保证,如果工件表面是凹凸不平的形状,要在工件表面划圆弧和椭圆线就很困难了。为了解决在凸凹不平的工件表面划圆弧和椭圆线的问题,我们设计并制造了一个椭圆划规,经多次改进设计,现经使用证明性能理想。这种划规,不管工件大小和表面形状如何都能划圆弧线,可不用作图法,直接准确的划椭圆线,经几年来的实践使用证 Marking is an important part of the machinery industry. Usually oval line drawn in the plane of the workpiece, according to the oval mapping method, this method of drawing low efficiency, accuracy is difficult to guarantee, if the workpiece surface is uneven shape, the workpiece surface arcs and ovals Very difficult. In order to solve the problem of arc and ellipse on uneven surface of workpiece, we design and manufacture an ellipse design. After many times of improvement design, it is proven to be ideal performance. This regulation, regardless of the size of the workpiece and the shape of the surface can be drawn circular arc, can not be used as plans, direct and accurate oval drawn line, after several years of practice certificate