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当零件廓形是阿基米德螺线时,可以使用本文所述的阿基米德螺线绘制仪进行各段划线。这种仪器由18个零件装成(见图),机体1是轻合金,其余零件多数为塑料和硬木。轴杆4插入套筒2中。滑块口带着铅笔或划针沿有纵向槽的导轨移动。滚柱10可绕轴线旋转,装在滑块12上方,其上系着绳6。可换绳卷3套在轴杆4上,并将绳6的另一头系好。为防止绳卷3回转,用销子将其同轴杆4固为一体。为防止轴杆4从套筒2中脱落,在其下端装上开口销。用弹簧17连结滑块12与可调卡板14,这样可保持绳6经常拉紧。按所给螺线半径确定滑块位置,并
When the part profile is an Archimedes spiral, you can use the Archimedes spiral plotter described in this article to make a dashed line. The instrument is made up of 18 parts (see photo). Body 1 is light alloyed and most of the remaining parts are plastic and hardwood. The shaft 4 is inserted into the sleeve 2. Slider mouth with a pencil or scribe along the longitudinal groove of the guide rail. Roller 10 is rotatable about an axis, mounted above slider 12, to which tether 6 is attached. Change the rope roll 3 sets in the shaft 4, and tie the other end of the rope 6 good. In order to prevent the rope coil 3 rotation, the pin with its coaxial rod 4 as a solid. In order to prevent the shaft 4 from falling off the sleeve 2, a cotter pin is attached at its lower end. A spring 17 is used to connect the slider 12 to the adjustable pallet 14 so as to keep the cord 6 constantly tensioned. The slider position is determined by the radius of the helix, and