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一组螺栓孔里圆周分布或呈其它型式分布的工件,常常借助回转工作台在摇臂钻床上加工。使用如下装置(图1),将有助于迅速而准确地使钻头找到中心位置。装置的本体由断面尺寸为20×40mm 的钢料制成,长度按摇臂钻的最大回转半径决定。其底面铣出两条相互平行的平面,以便与回转工作台的槽子配合;上面制出若干个中心孔,供钻头定中心之用。本体与回转工作台的联接还可通过一个圆柱销来实现。销的一段与本体孔压配,另一段与回转工作台的中心孔轻转配合。
A group of bolt holes distributed around the circumference or other types of workpieces, often with rotary table in the radial drilling machine processing. Using the following device (Figure 1) will help to quickly and accurately locate the drill bit to the center. The body of the device is made of steel with a cross-section of 20 × 40 mm and the length is determined by the maximum radius of gyration of the rocker arm. The bottom surface of two parallel milling plane, in order to work with the rotary table slot matching; above the center of a number of holes made for the drill centering purposes. The body and the rotary table can also be connected by a cylindrical pin. A section of the pin is press-fit with the body hole, and the other section is pivoted with the center hole of the rotary table.