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车削偏心零件(图1)时,关键是偏心部位的加工,其质量主要取决于工件在车床上的装夹方法。本文介绍在标准三爪卡盘上增加一个偏心盘的装夹方法。这样一来,既可以当作一般的正三爪卡盘使用,又可以使其中心在一定范围内作偏离车床主轴中心的偏心三爪卡盘使用,其结构如图2所示。法兰盘3和车床主轴联接,它制有一个偏心凸台,偏心盘2用于联接标准三爪卡盘1和法兰盘,其偏心距和法兰盘凸台的偏心距要完全相等。三爪卡盘用三个内六角螺钉和偏心盘2联接,然后一起由两个T形螺钉紧固在法兰盘3上。偏心盘的外圆面上,刻有0°～180°的刻度。法兰盘外圆面上和0°～180°相对处,刻有“游标”,读数可精确到3′。
Turning eccentric parts (Figure 1), the key is the processing of eccentric parts, the quality depends on the workpiece in the lathe clamping method. This article describes the standard three-jaw chuck to add an eccentric disk clamping method. In this way, it can be used as an ordinary three-jaw chuck, and the eccentric three-jaw chuck whose center is deviated from the center of a lathe spindle within a certain range can be used as shown in FIG. 2. Flange 3 and the lathe spindle coupling, which made an eccentric boss, eccentric disc 2 is used to connect the standard three-jaw chuck 1 and the flange, the eccentricity and the flange boss eccentricity to be exactly the same. Three claw chuck with three hexagonal screws and eccentric 2 coupling, and then together by two T-shaped screws on the flange 3. Eccentric disc outer surface, engraved with 0 ° ~ 180 ° scale. The outer surface of the flange and 0 ° ~ 180 ° opposite, engraved with “cursor”, the reading can be accurate to 3 ’.