The present invention relates to methods and apparatus for detection of fire states in the presence of welding activities. In some examples, the welding detection system may algorithmically calculate a risk of a fire state developing. In some embodiments, the welding fire detection and prevention system may communicate warning states to users, supervisors, equipment and/or building monitoring systems.

An electrode and a device for resistance spot welding are capable of preventing an occurrence of a surface spatter by using magnetism. The electrode may include a shank and a welding tip mounted to an end of the shank. A magnetic unit is installed on an outer peripheral surface of the shank to form a magnetic field and to form a Lorentz force in a direction of rotation along a circumferential direction of the shank by the magnetic field and a current flowing through the shank.

Disclosed are a welding system and a welding method using the same. The welding system may include: a main conveyor configured to convey a battery palette on which a battery module assembly is mounted; at least two auxiliary conveyors disposed in parallel with the main conveyor; a loading-unloading module configured to transfer the battery palette, which is conveyed along the main conveyor, to the auxiliary conveyor and transfer the battery palette, which is completely subjected to a preset welding process, from the auxiliary conveyor to the main conveyor; clamping jigs on which the battery palettes are seated by the loading-unloading module so that the preset welding process is performed on the battery module assemblies on the auxiliary conveyors; and at least two welding robots configured to weld the battery module assemblies seated on the at least two auxiliary conveyors.

In a coolant drop prevention system (1), a first pipe (4) has a first end connected to a portion of a coolant supply pipe (15) closer to a welding gun (11) than a first stop valve (2). A second pipe (5) has a first end connected to a portion of a coolant discharge pipe (16) closer to the welding gun (11) than a second stop valve (3). A drain pipe (6) has a first end connected to a portion of the coolant discharge pipe (16) farther from the welding gun (11) than the second stop valve (3). A pump unit (7) sucks in coolant from the first pipe (4) and the second pipe (5) and discharges the sucked coolant into the drain pipe (6).

A collet assembly including an actuator and a collet connected to the actuator. The collet assembly is adapted to be installed on a welding electrode holder having an electrode. The collet is moveable by the actuator from an advanced position, in which the collet is adapted to grip a fastener such as a welding rivet, and a retracted position, in which at least a portion of the collet is retracted into the actuator to enable the electrode to engage the fastener for welding to a work piece, and the collet is adapted to release the fastener.

A joining apparatus for panel sheets and a joining method for panel sheets using the same are provided. The joining apparatus includes an element punching device which stores and supplies elements according to a specification of a panel sheet and inserts the element into a first panel sheet among different types of panel sheets. Additionally, a welding device resistively welds a part of the first panel sheet into which the element is inserted by the element punching device.

A joining apparatus for panel sheets and a joining method for panel sheets using the same are provided. The joining apparatus includes an element punching device which stores and supplies elements according to a specification of a panel sheet and inserts the element into a first panel sheet among different types of panel sheets. Additionally, a welding device resistively welds a part of the first panel sheet into which the element is inserted by the element punching device.

The present invention relates to an air conditioner. The air conditioner according to the present embodiment has a refrigeration capacity of 11 kW to 16 kW, inclusive, and uses R32 as a refrigerant circulating therein, and since a refrigerant pipe therein is made of a ductile stainless steel material having 1% or less of a delta-ferrite matrix structure with respect to the grain size area thereof, the refrigerant pipe can maintain strength and hardness as good as or better than those of a copper pipe, while also maintaining good processability.

A method for thermally joining thermoplastic fiber composite components, including jointly covering thermoplastic fiber composite components to be joined, at least in the region of a joining zone, with a pressurization arrangement, which is flexible, at least in some section or sections, and extensive pressurization of thermoplastic fiber composite components to be joined by the pressurization arrangement, with the result that the fiber composite components are pressed against one another, at least in the joining zone. The fiber composite components are welded in the joining zone during pressurization. The pressurization is maintained by the pressurization arrangement until the joining zone solidifies. A cover is also disclosed, in particular a mold or diaphragm, for a pressurization device for thermally joining thermoplastic fiber composite components, and an apparatus for thermally joining thermoplastic fiber composite components.

A connector used to join metal pipes, rubber hoses, and other tubular bodies and lines together in order to establish a fluid-tight joint therebetween. The connector is a v-clamp in an example. One or more windows reside in a metal wall portion of the connector. The metal wall portion is a part of a band of the connector, per an example. The window(s) is located at a resistance spot welding site. By way of the window(s), an inspector can visually view and examine whether an intended resistance spot weld has been properly established at the metal wall portion of the connector.