柴油机机体(图1)很长(如9缸柴油机机体长为2600mm),机体上的主轴承孔定位缺口磨削加工十分困难。为此,我们设计了一套磨床夹具。(见图2),经使用效果较好。该夹具结构紧凑,使用方便。通用性好,效率较原方法可提高2～3倍,光洁度可由▽3提高到▽7。使用时,先以架体上的两个20H7的长槽与机体 Diesel engine body (Figure 1) is very long (such as 9-cylinder diesel engine body length 2600mm), the body of the main bearing hole positioning notch grinding is very difficult. To this end, we designed a set of grinder fixtures. (See Figure 2), the use of better. The fixture is compact and easy to use. The versatility is good, the efficiency can be increased by 2 ~ 3 times compared with the original method, and the finish can be increased from ▽ 3 to ▽ 7. When used, first with two 20H7 frame on the body and slot