The present disclosure provides three-dimensional (3D) objects, 3D printing processes, as well as methods, apparatuses and systems for the production of a 3D object. Methods, apparatuses and systems of the present disclosure may reduce or eliminate the need for auxiliary supports. The present disclosure provides three dimensional (3D) objects printed utilizing the printing processes, methods, apparatuses and systems described herein.

A micromachining device that utilizes a solid state laser beam scanner to steer and scan laser beams onto a moveable stage. There are no moving parts as in the galvometric scanner devices in current use. The laser beam scanner has two components, a variable frequency signal generator that is electrically connected to at least one substantially transparent and partially conductive substrate plate (hereinafter plate) with a generally planar face thereon that has a series of quantum dots (of an arbitrary size but narrow size distribution) affixed with the plate, where each of the quantum dots possess an inducible dipole moment, and each of the quantum dots are in electrical contact with the plate, where the quantum dots undergo an excitation and successive recombination (or relaxation) by the input of magnetic, optical or electrical signals.

A roof laser brazing system comprises a side home position jig installed at each of opposite sides of the transferring path of the body in the brazing section, a roof-pressing jig detachably mounted on a handling robot, docked to the side home position jig, and that home-positions and presses the roof panel loaded on the opposite side panels, a brazing assembly mounted on at least one brazing robot in the side home position jig side and that brazes bonding portions between the opposite side panels and the roof panel using a laser as a heat source, and a grinding assembly mounted on the at least one grinding robot in the grinding section and that grinds brazing beads of the bonding portions between the opposite side panels and the roof panel.

A laser blast shield for preventing damage to a first wall of a workpiece opposite a second wall being cut by a laser includes a metal substrate having a micro-textured topology and a highly reflective and thermally conductive metal coating deposited over the micro-textured surface to facilitate spreading of residual laser energy penetrating the second surface and absorption of the laser energy throughout the body of the blast shield.

A build plate-clamping assembly may include a work station having a build plate-receiving surface and a lock-pin extending from the build plate-receiving surface of the work station. The lock-pin may include a hollow pin body, a piston disposed within the hollow pin body, with the piston axially movable from a retracted position to an actuated position, and a plurality of detents, with the plurality of detents radially extensible through respective ones of a plurality of detent-apertures in the hollow pin body responsive to the piston having been axially moved to the actuated position. A methods of working on workpieces may include lockingly engaging a build plate at a first work station, performing a first work-step, releasing the build plate from the first work station, lockingly engaging the build plate at a second work station, and performing a second work-step. An additive manufacturing system may include a vision system with a first build plate-receiving surface and an additive manufacturing machine with a second build plate-receiving surface.

The concepts described herein provide a method, system, and apparatus for joining, via welding, first and second members fabricated from an aluminum alloy including aluminum, zinc, and manganese, such as 7000-series aluminum alloys, and a resultant workpiece. A junction is formed by a first member being disposed contiguously to a second member. A welding machine generates a weld pool at the junction that includes liquified aluminum alloy. An ultrasonic transducer directs ultrasonic energy in proximity to the weld pool. In some embodiments, an electro-magnetic transducer directs electro-magnetic energy in proximity to the weld pool. The first member is fused to the second member at the junction upon solidification of the weld pool.

A method of producing a glass substrate having a hole is provided. The method includes preparing the glass substrate having a first surface and a second surface facing each other; forming a hole in the glass substrate with a laser; and annealing the glass substrate placed on a first support substrate having a thermal expansion coefficient whose difference from a thermal expansion coefficient of the glass substrate is less than or equal to 1 ppm/K, where the first support substrate is placed on a second support substrate having a thermal expansion coefficient of less than or equal to 10 ppm/K.

A directed energy deposition nozzle assembly including (1) a nozzle configured to dispense material for directed energy deposition, wherein the material comprises one or more of metallic powder, ceramic powder, and glass powder, and wherein (a) the nozzle has an orifice through which the material exits the nozzle, wherein the nozzle comprises an inner body and an outer body that is peripherally disposed around the inner body, and wherein the orifice is defined by a gap between the inner body and the outer body, or (b) the nozzle comprises a plurality of orifices through which the material exits the nozzle, and (2) a vibrator configured to apply a vibration to the nozzle.

A laser processing machine including: a laser source that emits a laser beam; a polarization rotator unit; a beam rotator unit; a lens; and a controller, which apply the laser beam to a workpiece, the polarization rotator unit includes a wave plate and first actuator that rotates the wave plate, the beam rotator unit includes an optical system that adjusts an irradiation angle of the laser beam to the workpiece by making an incident laser beam eccentric to output and making the laser beam incident on the lens at a position eccentric from a central axis, a second actuator rotates the optical system, the lens condenses the laser beam on the workpiece, the controller controls a rotational speed ratio between the first actuator and the second actuator, and adjusts a polarized state of the laser beam by controlling the rotational speed ratio.

In one example, a system comprises a laser assisted bonding (LAB) tool. The LAB tool comprises a stage block and a first lateral laser source facing the stage block from a lateral side of the stage block. The stage block is configured to support a substrate and a first electronic component coupled with the substrate, and the first electronic component comprises a first interconnect. The first lateral laser source is configured to emit a first lateral laser beam laterally toward the stage block to induce a first heat on the first interconnect to bond the first interconnect with the substrate. Other examples and related methods are also disclosed herein.