Method and system for upsetting hollow members,申请号US200812673032-传众专利搜索

Method and system for upsetting hollow members

申请公布号：US9457394(B2)

申请号：US200812673032

申请日期：2008.08.07

申请公布日期：2016.10.04

申请人：

Magna International Inc.

发明人：Comer William K.

分类号：B21K21/12;B21J5/08;B21J9/06

主分类号：B21K21/12

代理机构：

Dickinson Wright PLLC

代理人：Dickinson Wright PLLC

地址：Aurora, Ontario CA

摘要：An apparatus and method for upsetting an end of a hollow workpiece to increase the wall thickness of that end is taught. A mandrel is inserted into the workpiece within a clamp which holds the workpiece. A die is urged into contact with the end of the workpiece to compress the end, decreasing its length and increasing the wall thickness of the end while the mandrel and clamp prevent deformation of the workpiece held in the clamp.

主权项：1. An apparatus for upsetting a hollow workpiece, comprising: a clamp for gripping the workpiece at a location offset from an open end of the workpiece that is to be upset, the clamp having a clamp surface shaped and sized complementary to the outer shape of a hollow workpiece; a one-piece die and first half cam having an inner cavity shaped and sized corresponding to a desired upset size and shape of the end of the workpiece and having a through-passage and having a first cam surface; a mandrel having a size and shape complementary to the interior surface of the workpiece, the mandrel being moveable into and out of the open end of the workpiece that is to be upset, the mandrel being positionable within the clamped portion of the workpiece, wherein the mandrel is axially moveable from a first position clear of the die and the clamp to a second position within the die and the clamp, the mandrel first entering the through-passage of the die from a side of the die opposite of the clamp and next entering the hollow interior of the workpiece and then entering the clamp; and a drive operable to move the die toward the clamp such that the die engages the end of the workpiece to be upset, the drive further operable to urge the die a pre-selected distance toward the clamp to upset the workpiece including decreasing the length of the end of the workpiece while increasing the wall thickness of the workpiece, the drive including a second half cam with a second cam surface that is shaped complementary to said first cam surface of said first half cam, and the drive including a ram operable to urge the second cam surface against the first cam surface to urge the die towards the clamp.