我厂63吨可倾压力机(型号 JB23—63)的工作键和制动键的形状见图1,其偏心距为48,偏心圆弧半径分别为 R53和 R54。它容易损坏,经常需要更换。过去我们在 X53K 立式铣床上加工偏心圆弧,达不到图纸要求,无法使用。为此,我们设计了一个专用夹具,用该夹具可在车床上车削偏心圆弧,车出的工作键和制动键符合图纸要求,解决了我厂的生产关键。夹具结构简单、制造容易、使用方便、效率也高(一次可车削四件)。车偏心圆弧夹具由轴1、固定圆盘2和可移动圆盘3等组成,见图2。使用时,用三爪卡盘夹住轴1 I plant 63 tons can be tilting presses (model JB23-63) working keys and brake keys shape shown in Figure 1, the eccentricity of 48, eccentric arc radius R53 and R54. It is easily damaged and often needs to be replaced. In the past we X53K vertical milling machine machining eccentric arc, can not meet the requirements of the drawings, can not be used. To this end, we designed a special fixture, the fixture can be used in lathe turning eccentric arc, the car out of the work keys and brake keys in line with the drawings requirements to solve the factory production of our key. Fixture structure is simple, easy to manufacture, easy to use, high efficiency (a turning four). Cart eccentric arc fixture by the shaft 1, the fixed disc 2 and the movable disc 3 and other components, shown in Figure 2. When used, clamp the shaft 1 with a three-jaw chuck