Punch top

The utility model discloses a punch top, the top is the bullet head type, the inside bullet head type cavity that is, the left end sets up support piece in the cavity, support piece includes supporting legs and roof supporting, the supporting legs is totally four, with the arc laminating of cavity inner wall, roof supporting sets up in the supporting legs right side, and circular for the fretwork, the centre sets up four fan -shaped fretwork holes, punch top, glossy anti -scratch layer can avoid in the course of working of steel pipe, because of carve to hinder on the surface, mar and tear etc. And influence quality of steel pipe, support piece not only can support the top but also can avoid the not hard up and drunkenness in top in steel pipe production, the arc fixed slot, the degree of depth is more shallow, can make things convenient for ejector pin and top to meet and leave mutually, the streamlined top makes things convenient for the production of steel pipe more, and is more laborsaving, long service l