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螺旋式快换夹具结构简单,使用方便,而且能减轻劳动强度,工效提高2～3倍,是车床上经常用来加工各种规格内外螺纹的通用性夹具。它可以加工M6～M20的各种规格内螺纹和外螺纹,包括盲孔内螺纹和台阶外螺纹。该夹具结构见图所示。螺旋式快换夹具操作程序介绍如下:将扳牙或丝锥装进快换套15,并被固定住。推动定位护套3,压缩弹簧5,快换套小端外圆将钢珠4压入定位护套3圆弧内,这样,快换套15便进入定位套1。当推动停止后,定位护套3在弹簧弹力作用下,向左移动,其孔壁即把钢珠压入快换套的圆弧中去,这样,快换套
Screw-type quick change fixture has the advantages of simple structure, convenient use, reduced labor intensity and improved work efficiency by 2 to 3 times. It is a universal fixture commonly used for machining various internal and external threads on a lathe. It can be machined M6 ~ M20 various sizes of internal and external thread, including the blind hole thread and stepped external thread. The fixture structure shown in the figure. Screw quick change jig operating procedures are described as follows: Fastener or tap into quick change sleeve 15, and was fixed. Push the positioning sheath 3, the compression spring 5, the quick-change sleeve small end of the outer circle will be pressed into the ball 4 positioning sheath 3 arc, so that the quick change sleeve 15 will enter the positioning sleeve 1. When the push is stopped, the positioning sheath 3 moves to the left under the elastic force of the spring, and the hole wall of the positioning sheath 3 presses the steel ball into the circular arc of the quick change sleeve, so that the quick change sleeve