An ultrasonic welding device is provided. The ultrasonic welding device includes an anvil configured to support a flexible first member below and overlapping a flexible second member, a horn configured to ultrasonically weld the first member and the second member with ultrasonic vibration and by changing elevation upwardly toward the second member, and a guide jig defining an opening corresponding to a welding portion of the first member and the second member and configured to guide elevation and ultrasonic vibration of the horn, the guide jig being configured to cover an external plane of the welding portion with a plane corresponding portion during ultrasonic welding of the first member and the second member.

A method for laser beam joining of at least two joining partners, in which a laser beam device produces a continuous weld seam along an application path with a preferably very long path length. Irregularities in the weld seam due to high process speeds are avoided as follows: in a first process step, at least two weld seam sections spaced apart from one another in the longitudinal direction of the path, are respectively produced with an intermediate weld seam interruption. In a second process step the laser beam device produces in each weld seam interruption a further weld seam section, such that all weld seam sections merge together without interruptions, in particular with formation of the continuous weld seam.

A double side welding method used for producing a differential gear for welding a weld part to join a ring gear fitted on a gear case from both sides. The method uses welding distortion caused by welding to improve product accuracy. The method includes welding from both sides of a weld part where a first member and a second member, which are the objects being joined, face each other. The method is performed by first welding, which is performed from one side, and second welding, which is performed from the other opposite side from that first welding. Heat quantity adjustment, that adjusts the quantity of heat input to the weld part for the second welding, is performed after the first welding, and is carried out such that an amount of welding distortion that is the objective arises.

The present disclosure relates to fluid injection valves. Embodiments of the teachings thereof may include a valve needle for a fluid injection valve and a fluid injection valve. For example, a valve needle for a fluid injection valve may include: a needle shaft; and a sealing ball welded to a tip of the needle shaft. The welded joint between the sealing ball and the needle shaft comprises at least two separate weld seams extending along a perimeter of the valve needle in the form of c-shaped arcs.

Methods for determining the quality of a weld of a workpiece welded by laser-beam welding, wherein at least a partial region of a molten pool and/or of a surrounding area of the molten pool is observed by means of a measuring system during the laser-beam welding and the quality of the weld of the welded workpiece is determined on the basis of the observation result. At least one characteristic value that correlates with molten pool oscillation of the molten pool is observed during the laser-beam welding and a measure of an amplitude of the molten pool oscillation and/or a measure of a frequency of the molten pool oscillation is determined from the observed time curve of the characteristic value. A probability and/or a frequency for the occurrence of hot cracks at the weld of the workpiece is inferred.

A method for forming a vertically cracked thermal barrier coating is disclosed including positioning an article relative to a heat source. The article includes a thermal barrier coating disposed on a first surface of a substrate, and the substrate includes a second surface distal across the substrate from the first surface. Heat is applied locally to at least one discrete portion of the second surface of the substrate. At least one vertical crack in the thermal barrier coating is formed disposed over the at least one discrete portion. An article is disclosed including a substrate and a vertically-cracked thermal barrier coating disposed on the substrate. The vertically cracked thermal barrier coating includes at least one vertical crack in the thermal barrier coating and at least one of a low density of less than 85% of a theoretical density for the thermal barrier coating and a selective crack distribution.

A metal block has a joint element. The joint element is defined between a trench in an outer surface of the metal block and a hole extending from the outer surface of the metal block to the interior space. The trench is configured such that when heat is applied to the joint element the trench reduces dissipation of the heat throughout the metal block. The hole is configured to receive a metal tube.

A method for quality control on laser peening correction of an aero-engine support includes: building a corresponding relation database of laser peening correction parameters and welding deformations through a big data platform; refining the structure of the aero-engine support; performing welding and laser peening correction on the refined structure; performing assembly welding and laser peening correction on the support; and performing correction effect detection. According to the solution, the complicated aero-engine support is refined into three simple refined structure, and a machining sequence of section-by-section welding, section-by-section laser peening correction, assembly welding and general laser peening correction is adopted. Because the laser peening correction is performed on all the refined structure before the assembly welding, the welding deformation of the support assembly may be reduced, and the support assembly is easier to be corrected during the laser peening correction.

A new technique in welding is provided that utilizes vibration during the welding process. The technique requires a pneumatic control panel having a master pneumatic input and dual pneumatic outputs. Each pneumatic output powers a pneumatic vibrator arranged in a particular orientation with respect to the weldment. The vibrators may be arranged such that the axes of rotation of the vibrators are orthogonal to the vector of the weld seam. The vibrators are set using the pneumatic control panel to vibration frequencies that are out of phase sufficient to form a beat frequency in the weldment. The weld produced when the welding occurs during this vibration yields less distortion and stronger and more predictable welds.

A system for generating a G-code for controlling an operation of a laser-cutting machine to cut parts from a sheet of material, upon receiving cutting data specifying a cutting order of parts and a cutting order of edges of each part, tests the parts for potential distortions and generates a G-code to avoid the potential distortion. For testing a current part, the system detects a potential distortion when the final edge of the current part is adjacent to an edge of a previously cut part scheduled for cutting before the current part according to the cutting order of parts. The system modifies the cutting order to select the modified cutting order for which the final edge is not adjacent to any edge of any previously cut part.