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在生产中,中间为孔工件的划线工序,可在毛坯孔中镶入一定宽度的铅条,在铅条上将毛坯孔的中心确定下来。而当孔的直径变小时,铅条以长去短,逐次使用。再划大直径工件时,需用新铅条。从而造成浪费。 为此我们设计了专用系列工具,见附图。该工具由本体、铅块、调整螺钉组成,孔径很大时,也可在两端加接杆。划线时将工具放入孔中,调节调整螺钉的长度,使其两端撑在工件内孔中,然后在其铅块上划出中心。再次使用时,将铝块上的中心孔用榔头铆几下即可。
In production, the middle of the hole for the workpiece marking process, the blank hole can be set in a certain width of the lead, the lead in the blank hole to determine the center down. And when the hole diameter becomes smaller, the lead to the long to short, one after another. Draw a large diameter workpiece, the need to use new lead. Resulting in waste. To this end we have designed a special series of tools, see the photo. The tool consists of the body, lead block, adjusting screw composition, the aperture is large, but also at both ends plus post. When scribing, place the tool into the hole, adjust the length of the adjusting screw so that both ends of the adjusting screw stay in the hole of the workpiece, and then draw the center on the lead block. When used again, the center hole on the aluminum block with a few rivets can be hammer.