US 9,808,855 B2
Rivet module and joining structure and method using the same
Yun Sung Chung, Busan (KR); and Mun Yong Lee, Busan (KR)
Assigned to SUNGWOO HITECH CO., LTD., Busan (KR)
Filed by SUNGWOO HITECH CO., LTD., Busan (KR)
Filed on Oct. 27, 2014, as Appl. No. 14/524,039.
Claims priority of application No. 10-2014-0124566 (KR), filed on Sep. 18, 2014.
Prior Publication US 2016/0084290 A1, Mar. 24, 2016
Int. Cl. F16B 35/06 (2006.01); B21J 15/02 (2006.01); F16B 19/08 (2006.01); F16B 19/10 (2006.01); B21J 15/04 (2006.01); B21J 15/14 (2006.01)
CPC B21J 15/02 (2013.01) [B21J 15/027 (2013.01); B21J 15/043 (2013.01); B21J 15/147 (2013.01); F16B 19/083 (2013.01); F16B 19/1054 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A rivet module for joining at least two sheets of base materials in a solid state, the rivet module comprising:
i) a shank portion to be mounted on a reciprocal and rotatable joining tool;
ii) a base material friction portion that is integrally connected to the shank portion and drills through the base materials as the joining tool causes the base material friction portion to be rotated while applying pressure to the base materials; and
iii) a base material fastening portion that is fixedly fitted to the shank portion, supports the base material friction portion, and is fastened to the base materials through a threaded portion including a thread formed on an outer peripheral surface thereof so that the threaded portion is disposed within the base materials,
wherein a circular cross-sectional diameter of the base material friction portion becomes progressively larger and then smaller from a part connected to the shank portion toward a tip, and the tip is sharpened,
wherein the base material fastening portion has a hollow space into which the shank portion and the base material friction portion are fitted,
wherein the hollow space comprises:
a first portion having a shape corresponding to a cross-section of the shank portion; and
a second portion connected to the first portion and having a shape corresponding to a region where the cross-sectional diameter of the base material friction portion becomes progressively larger,
wherein the base material friction portion is pulled upward by the joining tool and enters the first portion, and
wherein the threaded portion of the base material fastening portion is plastically deformed by the base material friction portion, causing a cross-section of the threaded portion to expand outward.