A joining system (100) of the present invention is for joining a joining target (W) including first, second, and third members (W1), (W2), (W3), and includes a welder (101), a friction stir welding machine (102), and a controller (110) that: (A) causes the welder (101) to weld the second and third members (W2), (W3); (B), after (A), causes the joining target (W) to be placed at the friction stir welding machine (102) so that the first member (W1) is opposed to a distal end of a tool (10); and (C), after (B), controls a linear motion driver (7) and a rotation driver (8) so as to, while pressing the distal end of the tool (10) to the joining target (W), rotate the tool (10) around an axis, so that the softened second and third members (W2), (W3) intrude into the softened first member (W1), thus joining the joining target (W).

Main current passage and subsequent current passage are performed, with a cooling time of 0.01 s or more being provided between the main current passage and the subsequent current passage. Ip/I which is a ratio of a current value of the subsequent current passage to a current value of the main current passage is controlled to satisfy a predetermined relationship depending on a constant A defined by Mn content and P content of a steel sheet as a part to be welded, in relation to a welding time Tp of the subsequent current passage, a cooling time T, and the constant A.

A resistance welding device is configured for use in combination with a resistance welder having a translating welding electrode. A first arm of the welding device is in a translating rotational engagement with a second arm thereof. The first arm of the device is engageable to a translating electrode from the resistance welder. Translation of the welding electrode of the resistance welder moves first and second electrodes to contact metal therebetween and spot weld the metal.

A single side heating apparatus equipped with a pair of electrodes for heating a workpiece is provided. The apparatus includes: a base portion; the pair of electrodes each having a contact portion configured to contact with the workpiece in one direction continuously or at a plurality of spaced-apart portions thereof; an electrode holder, to which the pair of electrodes are fixed; and a four-bar linkage provided between the base portion and the electrode holder and configured to rotate to tilt the electrode holder around an axis orthogonal to the one direction by a reaction force received by the electrodes from the workpiece. The four-bar linkage includes a first link located closer to the electrode holder, a second link located closer to the base portion, and third and fourth links. The first link is shorter than the second link, and the third link and the fourth link are equal in length.

A system for increasing joint strength and reducing embrittlement in a resistance spot weld of metal workpieces is disclosed. The system comprises a stackup of first and second metal workpieces, and an interface member disposed between the first and second metal workpieces. The interface member comprises a peripheral wall defining a hollow inner portion. The peripheral wall has a first open end extending to a second open end. The first open end is in contact with the first metal workpiece defining a first weld portion thereon. The second open end is in contact with the second metal workpiece defining a second weld portion thereon. The system further comprises a first electrode configured to contact the first metal workpiece to heat the peripheral wall at the first weld portion and join the first metal workpiece with the first open end of the peripheral wall. The system further comprises a second electrode configured to contact the second metal workpiece to heat the peripheral wall at the second weld portion and join the second metal workpiece with the second open end of the peripheral wall to define a weld joint. The system further comprises a power source configured to power the first and second electrodes and a controller configured to control the power to the first and second electrodes to heat the peripheral wall.

Provided are an electronic component, a lead part connection structure, and a lead part connection method which can reduce damage of a lead part and improve joint strength. In this lead part connection structure, a lead part (3) made of a conductor and a conductive wire (5) made of a plurality of core wires (52) are connected to each other through welding, wherein the lead part (3) and the conductive wire (5) are connected to each other through welding in a condition in which the lead part (3) is fitted into the plurality of core wires (52) of the conductive wire (5). In the conductive wire (5), the core wires (52) are not integrated with each other in advance through welding.

A system for resistance spot welding control and a method thereof are disclosed.

A system for regulating welding parameters of a spot welding machine joining a plurality of panels according to an aspect of the present disclosure includes an ultrasonic sensor installed inside an electrode of a welding gun, applying a ultrasonic wave to a welding part of the panel, and detecting a reflected ultrasonic signal; an ultrasonic analyzer capable of creating ultrasonic analysis information by analyzing in real time the ultrasonic signal; and a welding controller receiving the ultrasonic analysis information from the ultrasonic analyzer, performing adaptive welding control with the welding parameters set based on information of the panel, and compensating in real time one or more welding parameters according to the received ultrasonic analysis information.

An automated marking system for replaceable component tracking includes a robotic arm and a marking tool that is configured to place a distinguishing mark on a replaceable component of the robotic arm. A control system includes logic saved in memory that causes the robotic arm to move the replaceable component to the marking tool to place the distinguishing mark on the replaceable component.

A welding apparatus includes a welding rod; a temperature measuring jig to measure a temperature of the welding rod; and a welding rod cooler to cool the welding rod.

Provided is a method of resistance spot welding that can inhibit breakage of a high-tensile steel plate without materials being limited. One aspect of the present disclosure is a method of resistance spot welding including welding of a workpiece made of layered steel plates with a resistance spot welding apparatus. The resistance spot welding apparatus includes a first electrode contacting a first steel plate that is a high-tensile steel plate among the steel plates, and a second electrode contacting a second steel plate having less tensile strength than the first steel plate among the steel plates and configured such that the workpiece is interposed between the first electrode and the second electrode. In the welding, the first steel plate is compressed in a direction that intersects a thickness direction of the first steel plate at least from during welding of the workpiece until completion of welding of the workpiece.