机床夹具的分类与构成

机床夹具的分类与构成(中文1900字,英文1200字)
1机床夹具在机械加工中的作用
夹具是一种装夹工件的工艺装备，它广泛地应用于机械制造过程的切削加工、热处理、装配、焊接和检测等工艺过程中。在金属切削机床上使用的夹具统称为机床夹具。在现代生产中，机床夹具是一种不可缺少的工艺装备，对工件进行机械加工时，为了保证加工要求，首先要使工件相对于刀具及机床有正确的位置，并使这个位置在加工过程中不因外力的影响而变动。为此，在进行机械加工前，先要将工件装夹好。工件的装夹方法有两种:一种是工件直接装夹在机床的工作台或卡盘上;另一种是工件装夹在夹具上。采用第一种方法装夹工件时，一般要先按图样要求在工件表面划线，划出加工表面的尺寸和位置，装夹时用划针或百分表找正后再夹紧。这种方法无需专用装备，但效率低，一般用于单件和小批量生产。

Machine classification and pose fixture
1 fixture in the role of machining
Workpiece clamping fixture is a kind of process equipment, it is widely used in mechanical machining of the manufacturing process, heat treatment, assembly, welding and testing processes. In the use of metal-cutting machine tools collectively referred to as the jig fixture. n a modern production machine is an indispensable fixture of the process equipment, machining of the workpiece, the processing requirements in order to ensure. First of all to the workpiece and the machine tool relative to a correct position, and this location during processing does not change the impact of external forces. To this end, during the pre-machining, workpiece clamping must be good. There are two ways to clamp workpiece: one is directly clamping the workpiece in the machine table or on the chuck; The other is the workpiece in the fixture on the fixture.