Method of manufacturing unevenness shaped Z-pin and Z-pin manufactured using the same and composite structure including the Z-pin

Patent metadata

Field	Value
Publication number	US-9434110-B2
Application number	US-201314086161-A
Country	US
Kind code	B2
Filing date	Nov 21, 2013
Priority date	Jul 17, 2013
Publication date	Sep 6, 2016
Grant date	Sep 6, 2016

Abstract

Provided are a method of manufacturing a Z-pin having an unevenness shape formed on a surface thereof so as to economically and effectively increase coupling force in the Z-pin for coupling of a composite material laminated structure in a laminated direction, and a Z-pin manufactured using the same and a composite structure including the Z-pin.

First claim

What is claimed is:

1. A method of manufacturing a Z-pin having an uneven surface used for Z-pinning of a composite material laminated structure, comprising:
forming a pillar shaped body by an extruding process, the pillar shaped body having a length and a cross-section;
preparing a gear-shaped press-fitting forming jig having gear teeth formed along a circumference of the gear-shaped press-fitting forming jig;
pressing and rotating the gear shaped press-fitting forming jig on the pillar shaped body along a longitudinal direction thereof to form an unevenness pillar shaped body having an uneven surface, thereby forming unevenness in a surface of the pillar shaped body by the gear teeth; and
cutting the unevenness pillar shaped body at an inclined angle with respect to the longitudinal direction thereof into a plurality of Z-pins each having the uneven surface and a predetermined length, at least one end portion of each of the Z-pins having a sharp distal end.

2. The method of claim 1 , wherein the gear-shaped press-fitting forming jig includes at least one pair of press-fitting forming jigs facing each other.

3. The method of claim 1 , wherein the gear-shaped press-fitting forming jig includes at least two sets of press-fitting forming jigs, each set of the press-forming jigs facing each other, the gear teeth in the press-forming jigs having different angles with respect to the longitudinal direction of the pillar shaped body.

4. The method of claim 3 , wherein the at least two press-fitting forming jigs are disposed to be perpendicular to each other when viewed in the longitudianl direction of the pillar shaped body.

5. The method of claim 1 , wherein the gear teeth have different shapes.

6. The method of claim 1 , wherein the gear teeth have a symmetrical shape or an asymmetrical shape.

Assignees

• Korea Aerospace Res Inst

Inventors

• Choi Ik Hyeon
• Lim Cheol Ho
• Sim Eun Sup

Classifications

• Y10T29/49

  Method of mechanical manufacture · CPC title

• B29C37/0082

  Mechanical anchoring (B29C66/303 takes precedence) · CPC title

• B29C70/24 Primary

  oriented in at least three directions forming a three-dimensional [3D] structure · CPC title

• Y10T428/2976

  Longitudinally varying · CPC title

• B32B37/00 Primary

  Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding · CPC title