公开(公告)号：EP0581650B1

公开(公告)日：1996-06-12

申请号：EP93401897.9

申请日：1993-07-22

Applicant: REYNOLDS METALS COMPANY

Inventor： Lee, Harry W. ,  Jensen, Eric J.

IPC: B21D51/26 ,  B21D19/04

CPC classification number: B21D51/2615 ,  B21D19/046 ,  B21D51/263

公开(公告)号：EP0581650A1

公开(公告)日：1994-02-02

申请号：EP93401897.9

申请日：1993-07-22

Applicant: REYNOLDS METALS COMPANY

Inventor： Lee, Harry W. ,  Jensen, Eric J.

IPC: B21D51/26 ,  B21D19/04

CPC classification number: B21D51/2615 ,  B21D19/046 ,  B21D51/263

Abstract: A flanging head (10) assembly having a cluster of freely rotatable spin flanging rollers (12) includes a stop ring (26) against which the flange (68) hits during the final flange forming stages to limit the flange to a specific diameter. To prevent the flange from entering the crack (72) formed between the rotating roller and the stationary stop ring, there is provided a step (80) spacing the stop ring surface (70) from the roller forming surface (66). In this manner, as the terminal edge of the flange (68) slides around the flanging roller during final forming, it will pass over the crack (72) and across the step (80) to lodge in a corner (85) formed between the step and stop ring surface. In a preferred embodiment, the step is a conical surface extending from the stop ring surface in a direction away from the can bottom. This conical surface extends radially inwardly a sufficient distance to contact unsupported flange portions between the flanging rollers to limit the degree of elastic sagging of these portions.

Abstract translation: 具有可自由旋转的旋转凸缘辊（12）的一簇的凸缘头（10）组件包括止挡环（26），凸缘（68）在最终凸缘成形阶段期间撞击该止动环以将凸缘限制到特定直径。 为了防止凸缘进入形成在旋转辊和静止止动环之间的裂纹（72），提供了一个将止动环表面（70）与辊形成表面（66）间隔开的台阶（80）。 以这种方式，随着凸缘（68）的末端边缘在最终成形期间在折边辊周围滑动，它将越过裂纹（72）并穿过台阶（80），以便落在形成在凸缘 步进和停止环表面。 在优选实施例中，台阶是从止动环表面沿远离罐底的方向延伸的锥形表面。 该锥形表面径向向内延伸足够的距离以接触凸缘辊之间的未支撑的凸缘部分，以限制这些部分的弹性下垂的程度。