Sheet metal part machining method and range hood shell

The invention discloses a sheet metal part machining method and an extractor hood shell. The machining method comprises the following steps that S1, two adjacent wire grooves are formed in a sheet metal part through stamping; and S2, the back face of the part, between every two adjacent wire grooves, of the sheet metal part is bent, punching is conducted on the groove wall between every two wire grooves, and the two wire grooves communicate with each other. The back face of the sheet metal part between the two wire grooves is bent, the two wire grooves are communicated to form the complete wire groove, and therefore the problems that in the bending process of the profiled wire groove, bending is not formed or wrinkling deformation is caused by material extrusion at the corner of the bent position can be solved. 本发明公开了一种钣金件加工方法及吸油烟机壳体，加工方法包括以下步骤：S1、在钣金件上冲压分别形成两个相邻的线槽；S2、在相邻的两个线槽之间的钣金件背面上进行折弯，并在两个线槽之间的槽壁上进行冲压，将两个线槽连通。本发明在两个线槽之间的钣金件背面进行折弯，将两个线槽之间连通形成完整的线槽，进而可以解决压型线槽在折弯过程中，折弯处角部挤料导致的折弯不成型或者起皱变形等问题。