摘要:
In the manufacture of an electronic device comprising thin-film circuitry, a semiconductor film (1) on a polymer substrate (2) is subjected to a laser treatment, for example laser crystallisation, with a laser beam (10). The beam is reflected by the film (1). Significant non-uniformities in the laser treatment are found to occur due to a local overheating effect if the reflected laser beam (10b) impinges again on the heated area of the film (1). Thus, the invention identifies a particularly acute problem which arises when the device substrate (2) is of a heat-distortable polymer material in that the substrate (2) may experience temporarily a concave distortion at an area where the semiconductor film (1) on the substrate (2) is heated by the incident laser beam (10). The beam is focused as well as reflected by the concave distorsion in the substrate (2). Although the film (1) is under a window (22) of the treatment cell (20), this focused and reflected laser beam (10a) is prevented from being reflected again onto the same area of the film (1), by tilting the window (22) and/or the film/substrate (1, 2) at the area of the concave distortion at an angle theta so as to be inclined with respect to one another along the path of the beam (10).
摘要:
PCT No. PCT/JP83/00441 Sec. 371 Date Aug. 17, 1984 Sec. 102(e) Date Aug. 17, 1984 PCT Filed Dec. 17, 1983 PCT Pub. No. WO84/02296 PCT Pub. Date Jun. 21, 1984.This invention relates to improvement in a laser machining apparatus using both a working laser generator (101) and an auxiliary energy supplying apparatus (110) such as a plasma or the like. A feature of the invention is that an auxiliary energy generated from the auxiliary energy supplying apparatus is radiated on a workpiece (118) to a location which is slightly apart from an irradiation point of a working laser beam. In a preferred embodiment, the auxiliary energy supplying apparatus (110) is attached to a rotary disk (113) thereby allowing the auxiliary energy to be radiated to a location which is always preceding an irradiation point of the laser beam in the working progressing direction. The auxiliary energy may be radiated onto a surface opposite to the surface of a workpiece to which the laser beam is radiated. With such an arrangement, working efficiency and accuracy are improved and a structure of the whole system is also simplified, resulting in less failure. To further improve the working efficiency, in a desirable embodiment, an abrasive grain may be supplied to the working portion, or a high-pressure working fluid may be jetted thereto, or a working fluid to which an ultrasonic vibrational energy was applied may be supplied thereto. Further, a focal point automatic adjusting mechanism of the laser beam may be provided.
摘要:
There is provided a welding assembly comprising front (12) and rear (14) plates disposable to the front and rear of a joint to be welded, wherein each plate (12, 14) comprises an array of spaced apart evacuatable chambers (24, 24', 26, 26', 28, 28', 30, 30', 32, 32'), one of the chambers (32) being adapted to receive a welding gun (34). The evacuatable chambers (24, 24', 26, 26', 28, 28', 30, 30', 32, 32') are arranged so as to produce a pressure profile having a minimum pressure at the chamber (32) adapted to receive the welding gun (34). The front and rear plates (12, 14) have substantially identical configurations and spacings of chambers(24, 24', 26, 26', 28, 28', 30, 30', 32, 32'). Resilient sealing means (20, 20') in the form of a sheet extends over the internal face of each plate (12, 14) and are formed with apertures matching the array of chambers (24, 24', 26, 26', 28, 28', 30, 30', 32, 32').
摘要:
The invention relates to a method for laser cutting a meltable material, comprising heating and melting at least a part of the meltable material at a laser cutting spot (44) by using a laser beam (34) directed towards the laser cutting spot (44), and removing at least a part of the meltable material molten by the laser beam (34) by using an assist fluid jet (44), which is at least partially directed towards the laser cutting spot. The assist fluid jet (52) comprises liquefied carbon dioxide and the assist fluid jet (52) is provided at the laser cutting spot (44) at least partially in a liquid phase and at a higher pressure than an ambient pressure at the laser cutting spot (44). The invention further relates to an apparatus (30) for laser cutting and the use of liquefied carbon dioxide as an assist fluid (48) for laser cutting.
摘要:
There is provided welding apparatus (10) having a welding head (20) comprising an outer face attachable to a welding device (16) such as an electron beam gun or laser, an inner face sealable to a workpiece (12), and an outer sealing ring and an inner sealing ring situated within the inner face and disposed on either side of an evacuatable region, wherein the outer and inner sealing rings are formed from different materials, the outer sealing ring being formed from a material with a Shore hardness of between 50 to 70 and the inner sealing ring being formed from a material with a Shore hardness of 20 to 40. The welding head can be circular or teardrop-shaped. A bridging seal can extend from within the inner sealing ring to the outer sealing ring.
摘要:
A method and apparatus particularly for additively manufacturing materials that are susceptible to hot cracking. The additive manufacturing process may include a leading energy beam (16) for liquefying a raw material to form a melt pool (20), and a trailing energy beam (17) directed toward a trailing region of the melt pool. The trailing energy beam may be configured to enhance agitation and/or redistribution of liquid in the melt pool to prevent hot cracking, reduce porosity, or improve other characteristics of the solidified part. The method and apparatus also may improve processing parameters, such as adjusting vacuum level to prevent volatilization of alloying agents, or providing a chill plate to control interpass temperature. The process may be used to form new articles, and also may be used to enhance tailorability and flexibility in design or repair of pre-existing articles, among other considerations.
摘要:
A modular laser processing enclosure includes an enclosure housing defining a laser processing area. The enclosure housing includes a top defining a top laser processing access opening providing access to the laser processing area and at least two sides defining side laser processing access openings providing access to the laser processing area. The side laser processing access openings may be located proximate the top of the enclosure housing. The enclosure may further include at least one plate configured to cover any one of the laser processing access openings. Optionally, at least one laser processing head may be configured to be mounted to any one of the laser processing access openings and/or a least one part handling mechanism may be provided to access the laser processing area through any one of the laser processing access openings for delivering parts to and/or from the laser processing area.
摘要:
Es wird ein Verfahren zum Wideraufbereiten eines betriebsbedingt lokal geschädigten Bauteils (120) mit einer ursprünglich kubischen γ/γ' -Mikrostruktur, wobei die betriebsbedingte lokale Schädigung in einer entlang einer Ausdehnungsrichtung gerichteten Vergröberung der γ/γ' -Mikrostruktur besteht, zur Verfügung gestellt. In dem Verfahren wird die Ausdehnungsrichtung der gerichtet vergröberten γ/γ' -Mikrostruktur durch lokales Erwärmen und Einbringen einer Zug- und oder Druckspannung (503, 505), insbesondere im Bereich einer lokalen Schädigung des Bauteils, in ihrer Orientierung gedreht.
摘要:
Airbag-Perforationsvorrichtung zum Schneiden oder Perforieren von Polymer- und/oder Textilbauteilen von Airbags im Fahrzeugbau, umfassend einen Laser und eine Bearbeitungskammer, wobei der Laser zumindest teilweise in der Bearbeitungskammer angeordnet ist, wobei innerhalb der Bearbeitungskammer ein Unterdruck, Vakuum und/oder eine Schutzgasatmosphäre erzeugbar ist, wobei der Unterdruck und/oder das Vakuum über zumindest eine Vakuumpumpe erzeugbar ist, wobei die Polymer- und/oder Textilbauteile in die Bearbeitungskammer einbringbar sind, so dass sie durch den Laser bei Unterdruck, Vakuum oder in Schutzgasatmosphäre geschnitten oder perforiert werden können.