Analysis of the rotary cutting process of electrical steel on basis of a toroidal core test

Rotary Cutting of Electrical Steel Laminations – A Contrast to Traditional Stamping

“…On the other side two cylindrical roller bearings are mounted as floating bearings. [4] Moreover, at the drive side of the tool set, the spur gear is located. To ensure a synchronous and opposite rotation two gears of the same size are mounted on the shaft ends of the cylinders.…”

“…Therefore, the cutting cylinder immerses in the material without lifting. [4] The bearing unit is in the side walls of the housing. One side consists of two double-row angular contact ball bearings to absorb radial as well as axial forces.…”

“…To enable this, the toroidal core tests are comprehensively analyzed according to DIN IEC 60404-6. [4] The toroidal test specimens' inner diameter Di is 45 mm and outer diameter Do is 55 mm. The lamination stack length lstack is 10 mm consisting of 20 single toroidal laminations with sheet thickness s = 0,5 mm.…”

“…Finally, for investigation of electrical and magnetic properties, the toroidal core is wound with two coils of 16 windings each. [4] The cutting unit itself essentially consists of five components: Tool set, gear box, pressure rollers, bearing unit and housing. The housing consists of four plates which are detachably connected by screws and pins.…”

“…Thus, the punch also describes cycloid curves on the steel strip. [4,5] According to Figure 1 and [3], the conventional stamping process differs significantly from rotary cutting process through the following points:…”