Mechanical wrench control circuit

In order to reduce the labor intensity of the operator, shorten the auxiliary time, and improve the level of mechanization and automation,
various types of mechanical wrenches are widely used in combined machine tools and automatic lines to tighten or loosen
the nuts or bolts in the clamping mechanism to achieve automatic clamping Or loosen the item.
    The mechanical wrench control circuit is shown in Figure 2-19'. If the leap middle stroke switch sQ is loosened, it means that the wrench
is in a loosened state - the above operations can be performed. After clamping, return the clamping sleeve and press the sQ contact to connect
to other control circuits. At this time, since the sQ normally open contact is closed, other control circuits can be powered on and
work, so sQ is the clamping and releasing signal switch .