# US 4,393,679 A · Method for producing blank for wide flange beam

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- Number: US 4,393,679 A
- Document ID: US4393679A
- Status: Granted
- Kind: A
- Application number: 06/209,299
- Filed: 1980-11-21
- Granted: 1983-07-19
- Earliest claimed: 1979-12-29
- Assignees: Sumitomo Metal Industries, Ltd.
- Inventors: Yoshiaki Kusaba
- Web page: https://patentgrep.com/patent/US4393679A

## CPC

- B21B 1/088: H- or I-sections
- B21B: ROLLING OF METAL (auxiliary operations used in connection with metal-working operations covered in B21, see B21C; bending by rolling B21D; manufacture of particular objects, e.g. screws, wheels, rings, barrels, balls, by rolling B21H; pressure welding by means of a rolling mill B23K20/04)

## Abstract

A blank for a wide flange beam is produced by feeding a flat slab to a break-down mill in which a box caliber, one or more forming calibers and a sizing caliber are formed by a pair of rolls, and rolling the material in a former stage of the rolling process so that the rectangular ratio of the rolled material is substantially equal to the rectangular ratio of the slab.

## Claims

### Claim 1

A method for producing a blank for a wide flange beam, said method comprising:
forming a box caliber, at least one forming caliber and a sizing caliber by a pair of rolls of a break-down mill;
providing a flat slab as raw material with said flat slab having a rectangular ratio of width to thickness of from 3 to 6;
conducting a former stage of a rolling process by edging said raw material by said box caliber with the widthwise dimension of said material maintained vertically until the total reduction of said width is 30%, and then reducing said material, mainly in a web portion thereof, by said forming caliber, with the widthwise dimension of said web maintained horizontally, into a dog-bone-shaped workpiece having a rectangular ratio which substantially is equal to that of said raw material;
conducting a latter stage of said rolling process by edging said workpiece to reduce the width thereof by said box caliber with said web maintained vertically, and web-rolling said workpiece to reduce the thickness of said web by said sizing caliber with said web maintained horizontally, thereby forming said workpiece into a desired blank for a flange beam and providing said forming and sizing calibers to be sequentially smaller in width.

### Claim 2 (depends on 1)

A method as claimed in claim 1, wherein said rectangular ratio of said workpiece in said former stage is equal to that of said raw material with a tolerance of .+-.10%.

### Claim 3 (depends on 1)

A method as claimed in claim 1, wherein said web-rolling by said sizing caliber forms said blank with a rectangular ratio substantially larger than that of said raw material.