A method for analysing the quality of a weld bead in a welding zone using a thermal camera. A thermal image (IMG) of a given area is divided into a plurality of sub-areas each having a respective temperature (Ti). During a learning step, the temperature evolution (Ti(t)) of each sub-area is monitored for different welding conditions. During a training step, the temperature evolutions (Ti(t)) are processed for training a classifier (304). For this purpose, a respective cooling curve is extracted (302) from each temperature evolution (Ti(t)), and parameters (F) are determined that identify the shape of each cooling curve. The parameters (F) are used as input features for the classifier (304). In normal operation the temperature evolution (Ti(t)) of each sub-area (Ai) is monitored and the classifier (304) estimates weld quality (S).

A method utilizing cold welding to prepare grain boundaries having different included angles includes using a device including a support member. Two bent members are arranged opposite to each other in the support member. One ends of the two bent members are both fixedly connected to the support member, one end, away from the support member, of any bent member is fixedly connected to a first sample, one end, away from the support member, of the other bent member is fixedly connected to a second sample, and the first sample and the second sample are arranged corresponding to each other. The bent member includes a first metal sheet and a second metal sheet having different thermal expansion coefficients. An angle between the first sample and the second sample during butt welding can be controlled by changing an included angle of a bimetallic sheet.

The present disclosure relates to a portable production machine, a mobile terminal, a production system having a portable production machine and a mobile terminal, and a method for capturing data. According to aspects of the disclosure, on the production machine - which can be, for example, a welding machine or cutting machine - production data is automatically captured, organized into data sets, and converted into data set images, which are displayed on a display device. The displayed data set images are captured with a mobile terminal and transmitted to a central server. As a result, a plurality of production machines can be incorporated into a data system without the need for any changes to the hardware in the production machines.

A method is provided for determining whether post-weld heat treatments should be required for external attachment welds in applications where stress corrosion cracking is a possibility. According to the method, residual stress values are measured in test samples welded at high input heat levels and test samples welded at low input heat levels for a variety of different wall thickness. A threshold residual stress level is determined according to a method of selecting a common pipe used in industry and measuring the residual stress level in the longitudinal seam of the pipe. The measured residual stress values for the high and low heat input welds are compared against the threshold to determine whether for a particular wall thickness, the high and low input data exceeds the threshold, indicating whether post-weld heat treatments are required.

A method is specified for determining a size of a defect occurring in a surface region of a component while a surface modification process is performed on the surface region. The method includes identifying an occurrence of a defect occurring in a surface region of a component on a basis of a set of images and determining a size of the defect in a separate method step from the occurrence of the defect identified. In addition, an apparatus and a computer program are specified for determining a size of a defect occurring in a surface region of a component while a surface modification process is performed on the surface region.

A method for monitoring a spatter generating event during a welding application. The method includes capturing data that corresponds to a welding current of the welding application. The method also includes detecting parameters associated with a short circuit from the captured data. The method includes analyzing the detected parameters to monitor the spatter generating event during the welding application.

An ultrasonic machining device (1) for machining a workpiece. At least one component, selected from the group including a generator (11), a converter (12), a booster (13), a sonotrode (14), a HV cable (15), a machine frame (16) and a receiving device for the workpiece (17), is/are assigned an identifier (18). The identifier (18) characterizes at least one individual parameter of the component. The device (1) is assigned an input interface (19) which reads in the identifier (18) or generated data from the identifier. The device (1) is assigned a data processing arrangement (20). By way of the data processing arrangement (20), based on the read-in identifier (18) or the data generated from the identifier (18), at least one parameter of the device (1) is determined in such a way that the device (1) is operated in a target operating state, e.g., a resonant vibrating state.

Apparatus, systems, and/or methods are disclosed relating to welding systems that allow for virtual marking of welding workpieces. In some examples, a virtual marking process of the welding system generates and/or displays one or more markings on a display of the welding system in response to a dynamic input. In some examples, the dynamic input may comprise one or more of a user input received via a user interface, a marking instrument, and/or a welding gun of the welding system. In some examples, the dynamic input may comprise images captured by the welding system and recognized by the welding system as indicating markings. In some examples, the markings may guide an operator by indicating weld locations and/or weld order. In some examples, the markings may include embedded marking data (and/or metadata) that may be accessed and/or displayed to provide additional information and/or guidance to the operator.

A removable calibration plate (10) comprises a sheet (20) comprising an upper face (21) intended to face towards the powerful incident-radiation beam, and bearing a reference marking (30) and being intended to receive a test marking (40), and a lower face (23). The plate (10) comprises an etching layer (22) to be etched by a powerful incident-radiation beam (F),this layer being secured to the upper face (21) of the sheet (20) and opaque to visible light, and being able to be destroyed locally by the powerful incident-radiation beam (F) in order to form the at least one test marking (40), the sheet (20) being transparent to visible light, the lower face (23) of the sheet (20) being frosted.

A weld inspection apparatus that detects a weld defect in a welded portion of metal plates and includes a liquid application head disposed over one side surface of the metal plates and capable of moving in a welding direction of the metal plates, and an air jet head disposed over another side surface of the metal plates and capable of moving in the welding direction of the metal plates. The liquid application head includes a liquid application nozzle that projects toward the one side surface of the metal plates and applies liquid for sealing the welded portion. The air jet head includes an air jet nozzle that projects toward the another side surface of the metal plates and discharges air toward the welded portion to which the liquid has been applied.