Why do the upper and lower shaft cutting units of the slitting machine use an alternating male and female configuration?

In the field of metal longitudinal shearing, the blade of the same round knife, according to its installation position on the upper and lower knife shaft, can be used as a cutting edge of the upper knife unit or as a matching blade of the lower knife unit. Scientific expression should clearly distinguish the cutting unit of the upper and lower knife shafts.

In the cutting operation, each cutting strip requires a set of cutting units on the upper and lower cutting shafts to cooperate. When multiple cuttings are carried out, the cutting unit of the upper and lower knife shafts must be arranged alternately. The core purpose of this design is to cancel each other out the horizontal axial force generated by the shear force of the upper and lower tools, so as to avoid the bearing to bear continuous unilateral axial load, so as to effectively reduce equipment wear, reduce operating vibration, ensure the processing accuracy and long-term stability of the equipment under high-speed cutting conditions, and extend the service life of the equipment.