Pole Piece

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The pole piece is welded with the inner wall of the casing through two welding locating ribs. When the resistance heating causes the metal to melt instantaneously, the metal flows smoothly from the middle position with the largest diameter to the left and right ends, and the fluidity is better, thus significantly improving the welding quality and welding stability of the pole shoe and the inner wall of the casing, and greatly reducing the probability of quality accidents of the starter motor stator assembly.