发明名称 |
Method of making nailable steel floor channels |
摘要 |
A steel floor construction for freight hauling vehicles includes a plurality of elongated floor planking members arranged in side-by-side relation to provide a load bearing floor with a nailing groove between adjacent planking members. Each plank includes a downwardly open channel member having a relatively wide central web supported along its edges by integrally formed downwardly extending flanges, with the web being reinforced along its length by an upwardly directed generally U-shaped member welded to its bottom surface and having a pattern of anti-skid projections die-formed on and project upwardly from its top surface. The channels are progressively roll formed from a continuous length of strip steel by passing the strip through a series of forming roll pairs. A pair of die rolls are employed between two adjacent sets of forming rolls, with the die rolls being driven together and cooperating to form the anti-skid projections by a cold forming process after the sheet has been partially formed into this channel shape by passing through a plurality of the sets of forming rolls. The U-shaped reinforcing member is welded to the strip after the anti-skid projections are formed.
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申请公布号 |
US4267954(A) |
申请公布日期 |
1981.05.19 |
申请号 |
US19790060770 |
申请日期 |
1979.07.26 |
申请人 |
NATIONAL STEEL CORPORATION |
发明人 |
SMITH, JAMES T. |
分类号 |
B21D13/04;B21D22/04;B62D25/20;E04B5/10;(IPC1-7):B21D5/08;E04F15/06 |
主分类号 |
B21D13/04 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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