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.

A joining device includes: an electrode for transmitting a current to an object to be joined; a current supply section for generating the current supplied to the object due to a voltage being applied thereto; a current measurement section for measuring the current supplied to the object; and a first control unit for correcting the voltage applied to the current supply section based on a current value measured before a last time by the current measurement section such that a current value measured by the current measurement section becomes a target current value. A method for manufacturing a joined object includes: supplying a current, which is generated by applying a voltage to a current supply section, to the object to be joined; measuring the current supplied to the object; and correcting the voltage applied to the current supply section based on a ratio between the measured current value and a desired current value.

A joining device includes: an electrode for transmitting a current to an object to be joined; a current supply section for generating the current supplied to the object due to a voltage being applied thereto; a current measurement section for measuring the current supplied to the object; and a first control unit for correcting the voltage applied to the current supply section based on a current value measured before a last time by the current measurement section such that a current value measured by the current measurement section becomes a target current value. A method for manufacturing a joined object includes: supplying a current, which is generated by applying a voltage to a current supply section, to the object to be joined; measuring the current supplied to the object; and correcting the voltage applied to the current supply section based on a ratio between the measured current value and a desired current value.

The invention relates to a device (2) for welding hard material elements (4) onto teeth (6) of a saw blade (8), comprising a saw blade feed device (12) for moving the saw blade (8) in a feed direction (14), such that a tooth (6a) of the saw blade (8) can be brought into a target position (16) in a working region (10) of the device (2), comprising a first centering device (30) for centering the saw blade (8) transversely to the feed direction (14), comprising a second centering device (32) for centering a respective hard material element (4) transversely to the feed direction (14), comprising a resistance welding device (24) having a welding electrode (26) that can be deployed into and withdrawn from the working region (10), comprising a supply device (28) for supplying and transferring a respective hard material element (4) to the welding electrode (26), and it being possible for the welding electrode (26) to be deployed in such a way that the hard material element (4) can be brought toward the tooth (6a) to abut the tooth (6a). According to the invention, the hard material element (4) can be centered relative to the centered and fixed saw blade (8) by means of the second centering device (32), and the first and second centering device (30) are provided in a common assembly (38), such that the centering of the saw blade (8) by the first centering device (32) predetermines a centering position for the subsequent centering of the hard material element (4) by the second centering device (32).

Provided is a method that allows for firm joining of power module components even if a joining area is large. The method includes: forming an oxygen ion conductor layer on a surface of one of a first member to be joined containing metal and a second member to be joined containing ceramic; arranging the first member to be joined and the second member to be joined so that they are in contact with each other via the oxygen ion conductor layer; connecting the first member to be joined to one of a positive electrode side and a negative electrode side of a voltage application device and the second member to be joined to the other; and applying a voltage between the first member to be joined and the second member to be joined to join the first member to be joined and the second member to be joined together.

A method for joining first and second axle components is provided. In one example, the method includes forming an aperture in a first axle component that is mounted to a second axle component, where the aperture has a chamfer at one end thereof, inserting an object into the aperture, and resistance welding the aperture while applying pressure to the object so that the object fills the chamfer.

A method for joining first and second axle components is provided. In one example, the method includes forming an aperture in a first axle component that is mounted to a second axle component, where the aperture has a chamfer at one end thereof, inserting an object into the aperture, and resistance welding the aperture while applying pressure to the object so that the object fills the chamfer.

A resistance spot welding system can join two polymeric workpieces and includes a power supply. The power supply has a positive terminal and a negative terminal. The resistance spot welding system further includes a welding electrode assembly electrically connected to the power supply. The welding electrode assembly includes a housing, a first electrically conductive pin and a second electrically conductive pin. The first and second electrically conductive pins both protrude from the housing. The first electrically conductive pin is electrically connected to the positive terminal of the power supply, and the second electrically conductive pin is electrically connected to the negative terminal of the power supply. The second electrically conductive material is electrically insulated from the first electrically conductive pin. The first and second electrically conductive pins are at least partly made of a material having a hardness ranging between 50 HRC and 70 HRC.

A resistance spot welding system can join two polymeric workpieces and includes a power supply. The power supply has a positive terminal and a negative terminal. The resistance spot welding system further includes a welding electrode assembly electrically connected to the power supply. The welding electrode assembly includes a housing, a first electrically conductive pin and a second electrically conductive pin. The first and second electrically conductive pins both protrude from the housing. The first electrically conductive pin is electrically connected to the positive terminal of the power supply, and the second electrically conductive pin is electrically connected to the negative terminal of the power supply. The second electrically conductive material is electrically insulated from the first electrically conductive pin. The first and second electrically conductive pins are at least partly made of a material having a hardness ranging between 50 HRC and 70 HRC.

Method for the manufacture of a temperature sensor with a thermocouple comprising the following successive steps: a) introduction, in a support tube made of a ceramic material, of two thermocouple wires until they extend beyond said support tube; b) welding the ends of said thermocouple wires extending beyond said support tube so as to form a thermocouple hot point; c) introduction, at least partially, of the support tube into a reinforcement tube made of a stainless steel; d) fixing a cap onto said reinforcement tube so as to protect said hot point.