A structural member includes a body having a first surface, a second surface, and an end surface at an end portion of the structural member. The end portion of the structural member includes a root protrusion extending radially outward from the second surface of the structural member along a root protrusion radius to an outer end of the root protrusion to define a root protrusion height extending from the second surface of the structural member to the outer end of the root protrusion. The root protrusion further includes a root protrusion width extending between an inner edge and an outer edge of the outer end of the root protrusion. The root protrusion radius, the root protrusion height, and the root protrusion width are configured to define a stress protected weld root region isolated beyond and away from a root stress flow path propagated through the body of the structural member.

The present invention provides an additive manufacturing (AM) processing and design approach using removable “heat sink” artifacts to tailor the mechanical properties of traditionally low strength and low ductility alloys. As an example, the design approach was demonstrated with the Fe-50 at. % Co alloy, as a model material of interest for electromagnetic applications. AM-processed components exhibited unprecedented performance, with a 300% increase in strength and an order-of-magnitude improvement in ductility relative to conventional wrought material. The method enables the design and processing of high-performance, next-generation components and alloys.

A control device for reducing and homogenizing welding residual stress by acoustic waves, comprising: a fixing tool having two rows of through holes; a plurality of ultrasonic transducers each having a body and a conical horn transmitting portion at a lower end of the body, wherein lower ends of the horn transmitting portions are fixedly connected with flanges, the horn transmitting portions of the ultrasonic transducers extend into respective through holes of the fixing tool to be in contact with welded parts below the fixing tool, the flanges are fixed to the fixing tool by bolts, and the two rows of through holes are arranged both sides of a welding seam of the welded parts; and a driving device for driving the ultrasonic transducers to operate. A corresponding control method is also provided. The control device can be used to control residual stress at the welding seam of steels.

The present invention provides a single-beam double-physical-effect coordinating and distributing method applicable to uniform laser shock and application thereof, and belongs to the technical field of laser shock effect control. The present invention does not stipulate the specific adjusting and distributing mean, and only provides a coordinating principle and method. The present invention gives a universal and systematic method for setting absorption layer feature parameters applicable to mass laser shock uniform peening under a liquid constraint condition, so as to facilitate the relevant technician to quickly obtain the liquid constraint laser shock processing technology conforming to a distribution proportion of its double physical effects, thereby being beneficial to development and application of the laser shock peening treatment, and therefore having the good actual application value.

A method includes the following: an incidence step in which ultrasonic waves from an insertion side and the side opposite thereto of a tool are caused to be incident on a joint part when a workpiece is joined by the tool that has a probe and a shoulder which supports the probe and that is for friction stir welding; an image acquisition step for obtaining an ultrasonic wave transmission image of the joint part using the ultrasonic waves; and a determination step for determining that the joint part has been joined if width-dimensions of the joint part obtained from the ultrasonic wave transmission image are equivalent to at least the outer diameter d of the probe and if no defect of a prescribed size or greater is found in a range equivalent to the outer diameter D of the shoulder or less in the ultrasonic wave transmission image.

A laser welding apparatus includes: a laser oscillator configured to emit a laser beam toward a welding portion of a welded material; an optical interferometer configured to generate an interference signal that indicates an intensity of an interference beam of a measurement beam reflected by the welding portion and a reference beam; and a derivation unit configured to generate, based on the interference signal, two-dimensional tomographic image data indicating a correlation among a distance in a proceeding direction of welding of the welding portion, a depth of the welding, and an intensity of the interference signal, to extract specified depth tomographic image data within a specified range from the two-dimensional tomographic image data, and to derive a depth for each distance based on the intensity of the interference signal in the specified depth tomographic image data.

A light detection and ranging system including a mounting connection of a lens system in a mounting structure, including a lens system mounted in the mounting structure, the mounting connection including that the mounting structure includes at least one alignment opening, and the lens system includes a mounting shaft configured to mount the lens system in the mounting structure, wherein the alignment opening laterally surrounds the mounting shaft at least in part spaced apart in an alignment distance from the mounting shaft in the predefined alignment condition; and a spacer configured to span at least in part the alignment distance, wherein the mounting shaft is fixed in the alignment condition in the alignment opening by a first connection that fixes the spacer to the mounting structure, and by a second connection that fixes the spacer to the mounting shaft.

This method for acquiring weld pass information pertaining to execution conditions for a weld pass for welding two workpieces, which are to be welded by the welding robot, includes: a step in which a weld pass for welding the two workpieces is extracted from 3D CAD data; a step in which a wall determination model having a predetermined 3D shape is prepared; a step in which the wall determination model is positioned in the direction extending towards the outside of the weld pass, the end of welding which is the starting point or ending point of the weld pass serving as a reference; and a step in which, for the positioned wall determination model, a determination is made as to whether there is interference from a wall surface demarcated by another member different from the two workpieces.

In electric resistance welding for energizing a workpiece formed by superimposing plural metal plates, an energization resistance reduction amount between a pair of electrodes pressurizing the workpiece is detected at a specified time interval during each welding process under a specified welding condition, frequency distribution of the energization resistance reduction amount under the welding condition is calculated on the basis of data relating to the energization resistance reduction amount, the frequency distribution is fitted with a Gaussian function, and occurrence of an expulsion under the welding condition is determined on the basis of whether the fitting is statistically significant.

An arc welding display device is included in a welding apparatus having a weaving function of swinging a torch with respect to a welding direction. The arc welding display device displays, on a screen, at least one of a welding current and a welding voltage during the arc welding with a range sectioned by each fixed period including at least one weaving period.