The present invention relates to headed push-in fasteners of the type produced by Penn Engineering & Manufacturing Corp. known as TackPins and TackScrews. More specifically it relates to a Tack Pin or a Tack Screw with a Belleville head that provides the functionality of a Bellville washer without needing a separate part. When installed, the compression of the Bellville shaped head will cause a permanent loading to be applied under the head of the fastener, essentially creating a clamping force to the members being attached.

A system and method of joining at least two workpieces together using a friction rivet and a friction rivet cap that are friction stirred together after a cutting tip or cutting feature on the friction rivet cuts through workpieces and is then bonded to the friction rivet cap, and wherein the friction rivet cap may be excluded if the friction rivet includes a hollow in the cutting tip, the hollow being flared after the friction rivets cuts through the workpieces to thereby create an integral rivet cap in the end of the friction rivet.

An occurrence of thermal distortion when heterogenous materials are joined together is suppressed. Provided is a joining structure that includes a first member, a second member, a rivet and a resin-filled portion. The first member is formed of a first material. The second member is formed of a second material that is different from the first material. The rivet penetrates through at least the first member and joins the first member and second member together. The resin-filled portion is provided around the rivet at a side of the first member at which the second member is disposed. The resin-filled portion is formed by at least one of the first member and the second member and forms a gap between the first member and the second member. A resin member is disposed inside the resin-filled portion.

An occurrence of thermal distortion when heterogenous materials are joined together is suppressed. Provided is a joining structure that includes a first member, a second member, a rivet and a resin-filled portion. The first member is formed of a first material. The second member is formed of a second material that is different from the first material. The rivet penetrates through at least the first member and joins the first member and second member together. The resin-filled portion is provided around the rivet at a side of the first member at which the second member is disposed. The resin-filled portion is formed by at least one of the first member and the second member and forms a gap between the first member and the second member. A resin member is disposed inside the resin-filled portion.

The present invention discloses a riveting method and a riveting structure. The riveting method comprises providing a plate having a first side and a second side opposite to the first side; forming a wall portion on the first side of the plate, the wall portion having a first recessed area at its first side and a second recessed area at its second side opposite to the first side; placing the fastener in the first recessed area so that the fastener is adjacent to the first side of the wall portion; and applying a force to the wall portion from the second side of the wall portion so that the wall portion is deformed so as to at least partially enclosed the fastener. This technical solution can avoid unwanted indentation on the back of the plate.

The present invention discloses a riveting method and a riveting structure. The riveting method comprises providing a plate having a first side and a second side opposite to the first side; forming a wall portion on the first side of the plate, the wall portion having a first recessed area at its first side and a second recessed area at its second side opposite to the first side; placing the fastener in the first recessed area so that the fastener is adjacent to the first side of the wall portion; and applying a force to the wall portion from the second side of the wall portion so that the wall portion is deformed so as to at least partially enclosed the fastener. This technical solution can avoid unwanted indentation on the back of the plate.

Provided is a riveting device that deforms a rivet inserted into a through-hole formed in a plurality of plate-shaped members disposed in a superimposed state and secures the plurality of plate-shaped members, the riveting device including: an upper anvil that is disposed in a state in which the upper anvil faces an end surface of a head of the rivet; a lower anvil that is disposed in a state in which the lower anvil faces an end surface of a shaft portion 210 of the rivet; and a pressurizing mechanism that generates a pressurizing force of causing a distance between the upper anvil and the lower anvil along an axial line to decrease and plastically deforms the rivet, in which the pressurizing surface of the lower anvil is formed into a flat shape that perpendicularly intersects the axial line, and a surface roughening treatment is performed on the pressurizing surface.

An attachment for an end effector. The attachment may include a clamp and a foot adhesively bonded to an edge of the clamp and having a set of interlocking features that form a mechanical interlock with the clamp.

An attachment for an end effector. The attachment may include a clamp and a foot adhesively bonded to an edge of the clamp and having a set of interlocking features that form a mechanical interlock with the clamp.

A system for attaching layers of material together comprised of a self-piercing rivet, a layer having a clearance hole through which the self-piercing rivet passes on assembly, and a layer free of a clearance hole and into which the self-piercing rivet is at least partially inserted. The system may include a third layer free of a clearance hole. The system may also include three layers wherein the clearance hole is formed in the middle layer. If the clearance hole is formed in the middle layer, the width of the hole may be greater than the diameter of the self-piercing rivet to avoid contact between the rivet and the middle layer. The layer having the clearance hole may be a hard material such as steel. One or more of the layers may be material that is difficult to pierce or can be damaged if pierced.