| 摘要 |
Disclosed are a fin for heat exchangers, a drawing unit of the fin and a heat exchanger with the fin. A lower die (70) comprises a drawing male die (71), a male die fixing plate (72) and a height adjusting device (77); the height adjusting device (77) is used for adjusting height of the upper end face of the drawing male die. The male die fixing plate is provided with a through hole (72a) and an intra-plate oil feed path (81); the through hole (72a) allows embedding of the drawing male die; the intra-plate oil feed path (81) is provided with an opening part (81a) in the through hole. The drawing male die comprises an oil feed channel (82), a connecting path (85), a vertical oil feed path (83) and a transverse oil feed path (84); the oil feed channel (82) which is circular is communicated with the opening part of the intra-plate oil feed path; the connecting path (85) is communicated with the oil feed channel. When the height adjusting device adjusts the height, no matter how high the upper end face of the drawing male die is, and connection of the opening part and the oil feed channel can be maintained. According to the drawing unit, lubricant supply for a drawing part is improved, and a sleeve part of the fin for heat exchangers is machined more precisely. |
