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大批量生产中,有时在一道工序中在专用机床上既要进行普通(各种规格)螺纹的攻丝,又要同时加工锥管螺纹(见图1所示)。这时仅靠通用的攻丝靠模装置是无法控制锥管螺纹深度的,因为在大批量生产的过程中,一般是以毛坯面为基准来加工锥管螺纹的,而毛坯的铸造误差一般在3～4mm仍属正常。为此,我们设计了一种控制锥管螺纹攻丝深度的结构。它能以毛坯为基面对锥管螺纹进行攻丝,并能控制深度尺寸。如图2所示,图示位置为原始位置。靠模螺母装在座套上是固定不动的。座套装在攻丝主轴箱前盖上,攻丝主轴箱与动力头连接在一起。当动力头快进至一定行程位置时,行程挡杆与工件毛坯基面接触定位,
In mass production, it is sometimes necessary to perform tapping of normal (various specifications) threads on a special machine tool in one operation, and to process taper pipe threads at the same time (see FIG. 1). In this case, the common thread tapping device can not control the depth of the taper pipe thread, because in the mass production process, the taper pipe thread is generally machined on the basis of the blank surface, and the casting error of the blank is usually 3 ~ 4mm is still normal. To this end, we have devised a structure that controls tapping thread taper depth. It can tap the taper pipe thread on the base of the blank and control the depth dimension. As shown in Figure 2, the icon position is the original position. Die nut mounted on the seat cover is fixed. Block seat tapping the front cover of the spindle box, tapping the headstock and power head connected together. When the power head fast forward to a certain stroke position, the travel block and workpiece blank base surface contact positioning,