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目前,钢管三通的马口,仍然是用画展开图的方法手工切割。为改变这种工效低、质量差的状况,特设计了如图1所示的切割器械。可切割正交、斜交及偏心交的三通马口,两管切割坡口吻合。主管与支管的相关线是两圆柱面的交线。以图2中的坐标系为例:相关线在YOZ及XOZ两平面上的投影,分别是半径为R及r的圆弧。动点O′沿相关线的运动,可以分解为沿支管及主管的圆弧运动,其特点是两圆弧上的
At present, the mouth of the pipe tee is still hand-cut by means of drawing a picture. To change this low efficiency, poor quality conditions, specially designed as shown in Figure 1 cutting instruments. Can be cut orthogonally, oblique and eccentric cross the three-way horse mouth, two pipe cutting groove anastomosis. Supervisor and branch of the relevant line is the intersection of two cylindrical surface. Taking the coordinate system in Figure 2 as an example: The projection of the correlation line on the two planes YOZ and XOZ is a circular arc with radius R and r, respectively. The movement of the moving point O ’along the relevant line can be decomposed into a circular arc along the branch pipe and the main pipe, which is characterized by two circular arcs