In a laser welding method for joining a first workpiece to a second workpiece, the first and the second workpieces are brought into contact with each other in a first method step, an intended welding distortion is ascertained in a second method step, and the first and the second workpieces are welded together in a third method step as a function of the welding distortion.

The present invention describes a stronger and more durable welded joint for attaching individual baffle members and spacer members within a firearm suppressor or silencer. In the preferred embodiment, the diameter of the individual spacers is slightly larger than the diameter of the adjacent baffle members at the joint. Additionally, the thickness of the spacer member casing increases as it approaches the joint. When the spacer members are attached to the ends of the baffle members, this configuration produces a joint such that the entire well seam is inside the diameter of the adjacent spacers, i.e. no material extends beyond the diameter of the spacer. The extra material on the spacer at the baffle/spacer joint is then melted along with the baffle material to form a stronger welded joint that does not extend beyond the diameter of the spacer.

A method for limiting fitting distortion when welding a fitting to an in-service pipelinewhere the fitting includes a thick, longitudinally extending, seam located between fitting halvesinvolves welding, on each side of the fitting, a middle third section of the seam in a pyramid-like fashion using an inward progression starting from an end of the middle third section along a profile of a seam bevel, and welding outer third sections of the seam using an outward progression from an end adjacent to the middle third section along a profile of the seam bevel. The welding of each of the three sections per side includes a temper bead welding technique of at least two layers to provide stress relief in lieu of traditional post weld heat treatment.

A method for constructing a body-in-white (BiW) spot welding deformation prediction model based on a graph convolutional network (GCN) includes: 1) acquiring a welding feature and 3D coordinates of a spot weld to form an eigenvector and extracting designed 3D coordinates at each 3D coordinate measurement point; 2) encoding, by an encoder, eigenvectors and designed 3D coordinate vectors into hidden space vectors of spot welds and hidden space vectors of the coordinate measurement points, respectively, and constructing a graph topology G through a k-nearest neighbors algorithm; 3) decomposing a Laplacian eigenvector of the constructed graph topology G to acquire frequency domain components, and linearly transforming eigenvalues corresponding to the frequency domain components to construct a multi-layer GCN; 4) inputting the thermodynamic and kinetic information of each coordinate measurement point into a deep neural network and decoding a final deformation at each coordinate measurement point; and 5) optimizing the model.

A multi-spots welding method for processing a camera and a laser radar includes a position-determining method of welding spots, a solder-control method and a welding energy compensation method; the position-determining method of welding spots includes providing a plurality of welding spots between a first weldment and a second weldment; the solder-control method includes adding equivalent amount of solder on the plurality of welding spots according to a preset amount of the solder; and the welding energy compensation method includes detecting energy of the plurality of welding spots in real time when the plurality of welding spots are welded simultaneously, comparing detected real-time data of the plurality of welding spots with the preset amount of the solder.

Provided is a vehicle frame structure including (1) a first frame member that has a closed cross-sectional shape as seen in a cross-sectional view orthogonal to an extension direction and (2) a second frame member that extends along the first frame member, overlaps a wall surface of the first frame member, and has a hole portion that exposes the wall surface, with an edge portion of the hole portion being joined to the wall surface by a linear welded portion, wherein both end portions of the welded portion are disposed in close proximity to a neutral axis of the first frame member and the second frame member in a case in which the first frame member and the second frame member have undergone bending deformation in an in-plane direction of the wall surface in which the welded portion is formed.

An example additive manufacturing apparatus includes an energy source to melt material to form a component in an additive manufacturing process, a camera aligned with the energy source to obtain image data of the melted material during the additive manufacturing process, and a controller to control the energy source during the additive manufacturing process in response to processing of the image data. The controller adjusts control of the energy source based on a correction determined by: applying an artificial intelligence model to image data captured by a camera during an additive manufacturing process, the image data including an image of a melt pool of the additive manufacturing process; predicting an error in the additive manufacturing process using an output of the artificial intelligence model; and compensating for the error by generating a correction to adjust a configuration of the energy source during the additive manufacturing process.

A gear box having a carburized shaft and steel bearing assembly. The bearing includes an inner-race and an outer-race. The shaft includes a distal end surface extending perpendicularly from a shaft faying surface and a shaft annular beveled edge. The shaft faying surface is in intimate contact with the inner-race. The inner-race second annular face is coplanar with the distal end surface. The shaft annular beveled edge cooperates with the inner-race faying surface to define a half-V shaped groove. An annular weld joint is formed in the half-V shaped groove thereby joining the shaft to the inner-race. The outer-race includes a first width (W1) and the inner-race includes a second width (W2). W2 is wider than W1 by greater than 0 millimeters (mm) to about 10 mm.

A structural member is disclosed. The 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.

A method for positioning a welding clamp includes: a first step of determining a reference clamp position on a first workpiece (STEP 2); a second step of determining a first workpiece state in welding and determining the presence or absence of a site having a deflection larger than a predetermined deflection amount in the first workpiece (STEPs 3 to 5); and a third step of, if the second step determines the presence, determining the site as an additional clamp position (STEP 6). The method suitably determines a limited number of clamp positions that cause no welding target workpiece deflection exceeding the predetermined deflection amount by repeating the second step and the third step until the second step determines the absence.