A reinforcement beam is roll formed from a metal sheet for use in a vehicle bumper system. The reinforcement beam includes adjacent tubes having a common center wall and lateral portions extending from opposing sides of the common center wall that are roll formed simultaneously in the same rotational direction to enclose interior volumes of the adjacent tubes and to define top and bottom walls and front and rear wall of the reinforcement beam. The front walls of the adjacent tubes each include a channel rib depressed into the interior volume of the respective adjacent tube longitudinally along the reinforcement beam for stiffening the respective front wall. A weld is formed separately in each of the seams between the front walls and between the rear walls, thereby defining a crevice rib between the channel ribs to improve the bending strength and torsional strength of the reinforcement beam.

A positive electrode tab and negative electrode tab of a battery pack are configured by stacking a plurality of single cells each of which has positive electrode tab and negative electrode tab drawn outward and formed of metals different from each other in kind. In a welding method, clad material is disposed between positive electrode tab of second single cell and negative electrode tab of first single cell. Next, with a laser welder, focal point is aimed at interface between negative electrode tab and clad material, and laser is applied thereto from the side of negative electrode tab. Then, focal point is aimed at interface between positive electrode tab and clad material, and laser is applied thereto from the side of positive electrode tab.

A method for marking a thin workpiece is designed to prevent deformation of the workpiece. A plurality of lasers are opposed to respective opposite sides of the workpiece so as to both sides are heat treated. The lasers can operate synchronously with the respective emitted beams aligned with one another. As a result, the workpiece does not exhibit signs of deformation upon the completion of the marking. The workpiece is made either from plastic or metals and has a thickness not exceeding 2 millimeters. The lasers each are configured as either a fiber laser or a gas laser. The marking can be performed by lasers which are configured uniformly or non-uniformly and includes annealing, engraving and ablating. The marking can be performed synchronously or sequentially. The multi-surface marking could also be used to cause distortion of the surface in a more controlled or desired fashion.

Disclosed is a process of annealing through silicon vias (TSVs) or other deeply buried metallic interconnects using a back side laser annealing process. The process provides several advantages including sufficient grain growth and strain relief of the metal such that subsequent thermal processes do not cause further grain growth; shorter anneal times thereby reducing cycle time of 3D device fabrication; and reduced pattern sensitivity of laser absorption.

A double-directional machining laser machine tool includes a focused laser source, a lifting platform, a motion platform, a rotating platform, a height sensor, a vision module, and a control device. The control device drives, according to a distance detected by the height sensor, the lifting platform to lift the focused laser source up or down, and drives, according to an image, the motion platform to displace the bearing table, so as to enable a first laser beam outputted by the focused laser source forms a first recessed hole at a predetermined position on a first surface of a workpiece. The control device drives the rotating platform to rotate the workpiece, so as to enable the first laser beam forms a second recessed hole on a second surface of the workpiece, and the first recessed hole is in communication with the second recessed hole, so as to form a deep hole.

Methods are provided for manufacturing a shell assembly for an electrical connector. First and second shells of a shell assembly may be formed from metal sheets via a stamping process. The stamping process may produce a number of first shells attached to a section of metal sheet remaining after the stamping processa guide railwith the front end opening of the first shell being oriented at 90 degrees relative to the guide rail. A second shell may be formed and severed from a metal sheet as a result of the stamping process. One end of the first shells may be exposed after the stamping process such that the second shells may be assembled over the exposed end of the first shells to form a shell assembly. Additional operations can be performed on the shell assembly.

A method is provided for the internal processing of a transparent substrate in preparation for a cleaving step. The substrate is irradiated with a focused laser beam that is comprised of pulses having an energy and pulse duration selected to produce a filament within the substrate. The substrate is translated relative to the laser beam to irradiate the substrate and produce an additional filament at one or more additional locations. The resulting filaments form an array defining an internally scribed path for cleaving said substrate. Laser beam parameters may be varied to adjust the filament length and position, and to optionally introduce V-channels or grooves, rendering bevels to the laser-cleaved edges. Preferably, the laser pulses are delivered in a burst train for lowering the energy threshold for filament formation and increasing the filament length.

According to one embodiment, an optical machining apparatus includes a first light source, and a second light source. The first light source is configured to radiate a first beam onto a first position of a surface of a work in such a manner as to transfer heat at a temperature lower than a melting temperature of the work from the first position of the work to a second position of a surface of the work on an opposite side to the first position. The second light source is configured to radiate a second beam onto the second position such that a temperature of the work exceeds the melting temperature of the work, in a state in which a temperature of the second position is raised by the transfer of the heat.

A system for welding a first component to a second component. The system includes a first laser head configured to emit a first laser beam and be movably disposable on a first side of the first component. The system further includes a second laser head configured to emit a second laser beam and be movably disposable on an opposing second side of the first component. The system further includes a controller configured to independently control a first power of the first laser beam and a second power of the second laser beam. The controller is also configured to independently and simultaneously control movement of the first laser head and movement of the second laser head relative to the first component.

A mask includes a mask sheet including an upper surface and a lower surface facing the upper surface, the mask sheet including an opening passing through the upper surface and the lower surface; and a mask frame that supports the mask sheet, the mask sheet includes a protrusion adjacent to the opening and protruding from the lower surface, and a recess adjacent to the protrusion and recessed from the lower surface toward the upper surface of the mask sheet.