{
  "$type": "site.standard.document",
  "description": "A means which can enhance fatigue strength of ear portions which are high fatigue risk parts in a torsion beam almost without bringing about disadvantages in terms of productivity and cost is provided. To be more specific, in manufacturing the torsion beam by forming a tubular body 1, a portion of…",
  "path": "/patents/1005422",
  "publishedAt": "2012-02-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B21D11/02",
    "JFE STEEL CORP [JP]"
  ],
  "textContent": "A means which can enhance fatigue strength of ear portions which are high fatigue risk parts in a torsion beam almost without bringing about disadvantages in terms of productivity and cost is provided. To be more specific, in manufacturing the torsion beam by forming a tubular body 1, a portion of the tubular body is formed into an approximately U-shape in cross section by crushing the portion of the tubular body in the radial direction and, thereafter, due to bending with a bottom line 3 set as a belly side of bending, a bending strain of 2 to 6% in the tube longitudinal direction on a tensile side is imparted to the ear portions 2.",
  "title": "METHOD FOR MANUFACTURING TORSION BEAM"
}