# US 10,245,628 B2 · Ultra-fine wire fabricating apparatus and method

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- Number: US 10,245,628 B2
- Document ID: US10245628B2
- Status: Granted
- Kind: B2
- Application number: 15/421,379
- Filed: 2017-01-31
- Published: 2017-09-07
- Granted: 2019-04-02
- Earliest claimed: 2017-01-31
- Applicants: Mojtaba Pourbashiri; Mohammad Sedighi; Christof Sommitsch
- Inventors: Mojtaba Pourbashiri; Mohammad Sedighi; Christof Sommitsch
- Web page: https://patentgrep.com/patent/US10245628B2

## CPC

- B21C 1/04: with two or more dies operating in series
- B21C 1/003: {Drawing materials of special alloys so far as the composition of the alloy requires or permits special drawing methods or sequences}
- B21C 23/001: {to improve the material properties, e.g. lateral extrusion}
- B21C 23/08: Making wire, rods or tubes
- C21D 7/10: of the whole cross-section, e.g. of concrete reinforcing bars
- B21C 25/02: Dies
- C21D 9/525: {for wire, for rods (C21D9/54 takes precedence)}
- C21D 2201/03: Amorphous or microcrystalline structure
- B21C: MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B)

## Abstract

The ultra-fine wire fabricating apparatus comprises a feeder assembly, a stationary die, and a rotary die holder. The feeder assembly supplies a wire. The stationary die comprises a hollow inclined channel configured on an inner surface of the stationary die. The hollow inclined channel is configured to receive the wire from the feeder assembly. The rotary die holder configured to receive the wire from the stationary die and simultaneously torsionally deform the wire, wherein the rotary die holder rotates relative to the stationary die to produce the ultra-fine wire with improved mechanical properties. The method ensures continuous grain refinement of wires. The wires are severe plastic deformed using the combined effects of the stationary die and rotary die holder. The mechanical properties of the raw materials are improved due to a grain refinement and microstructure evolution caused by plastic deformation.

## Claims

### Claim 1

An ultra-fine wire fabricating apparatus for producing an ultra-fine wire with improved mechanical properties, the ultra-fine wire fabricating apparatus comprising:
a feeder assembly for supplying a wire;
wherein the wire is 4 mm in diameter;
wherein the feeder assembly comprises a roller unit configured to supply wire to a hollow inclined channel of a stationary die;
the stationary die is placed in a rotary die holder, the hollow inclined channel configured on an inner surface of the stationary die, the hollow inclined channel configured to receive the wire from the feeder assembly; and
wherein the rotary die holder rotates about a X-axis relative to the stationary die,
is configured to receive the wire from the hollow inclined channel of the stationary die, and the rotary motion of the rotary die holder causes torsional deformation in the wire simultaneously, to produce ultra-fine wire with improved mechanical properties;
a pick-up spool assembly operably engaged to the rotary die holder for collecting the fabricated ultra-fine wire.

### Claim 2 (depends on 1)

The ultra-fine wire fabricating apparatus of claim 1,
wherein the rotary die holder is connected to a motor, via a pulley and a belt.