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哈尔滨科技大学机械厂是多年生产齿轮油泵的工厂,使用大量的圆柱销、内六角螺钉等外购件,所以外购件质量对产品质量的影响很大。齿轮油泵是由齿轮,轴及三扇体等主要零件组成的。总装时靠定位销定位后,用六个六角螺钉紧固,所以对螺钉的直线度要求较高。当螺钉的长度l与直径d之比即l/d>时,螺杆变形不大,直线度问题不是主要问题;当l/d>8时,直线度的问题就成为主要矛盾了。
Harbin University of Science and Technology Machinery Plant is the production of gear pump plant for many years, using a large number of cylindrical pins, screws and other outsourcing pieces, so the quality of purchased parts of a great impact on product quality. Gear pump is composed of gears, shafts and three main components and other components. Assembled by the positioning pin positioning, with six hex screws, so the straightness of the screw requires a higher. When the screw length l and the diameter d ratio l / d>, the screw deformation is not large, straightness problem is not the main problem; when l / d> 8, the straightness problem has become the main contradiction.