Claims
- 1. The method of hot rolling a metal slab in a plurality of mill stands to a transfer bar of reduced thickness, reduced width and substantially rectangular plan comprising forging the leading end of the slab to taper it to an end width less than the reduced width desired for the pass, thus upsetting the slab at that end, edge rolling the slab from the tapered end throughout its length, thereby further upsetting the slab and transferring upset metal into the voids left by said forging, rolling the edge rolled slab in a mill stand to reduce the thickness of and elongate the slab, thereby spreading it laterally, gradually reducing the edge rolling as the trailing end of the slab enters said thickness reducing mill stand, thereby allowing the trailing end to fan out to an increased width and to bulge rearwardly from its fanned edges, and edge rolling the trailing end of the slab to the desired width after it exits from the mill stand, thereby transferring metal to fill the corners of the fanned-out trailing end.
- 2. The method of hot rolling a metal slab in a plurality of mill stands to narrow the slab to a desired width and reduce trailing end fishtailing comprising edge rolling the slab, thus upsetting it, passing the edge rolled slab into a thickness reducing mill stand while the trailing end of the slab is being edge rolled, gradually reducing the trailing end edge rolling, thus allowing the trailing end to fan out to an increased width and bulge rearwardly from its fanned edges, and edge rolling only the trailing end of the slab only to said desired width after it exits from said thickness reducing mill stand, thereby causing sufficient fishtailing to fill the corners of the fanned trailing end.
- 3. The method of claim 2 including the further step of reversing the travel of the slab, forging the now leading end of the bar to taper it to an end width less than the reduced width desired, then upsetting it at that end, edge rolling the slab from the tapered end, and rolling it through said thickness reducing mill stand in the reverse direction, thereby causing sufficient front end fishtailing to fill the voids of the tapered leading end.
Parent Case Info
This is a division, of application Ser. No. 447,790, filed Dec. 8, 1982 U.S. Pat. No. 4,502,311.
US Referenced Citations (6)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0035302 |
Sep 1981 |
EPX |
0014004 |
Feb 1981 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
447790 |
Dec 1982 |
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