摘要:
A method for erecting a solar field (20) includes inserting piles (24) into the ground (22) in a predefined pattern covering an area of the solar field, and deploying rails (32, 36) between the piles. Elements (64, 66, 70) of an array of solar collectors (80) are transported along the rails to respective deployment locations in the solar field. The solar collectors are erected on the piles using the elements at the respective deployment locations.
摘要翻译:一种具有一体式背板的溅射靶,其特征在于,凸缘部分的维氏硬度(Hv)至少为90°,凸缘部分的0.2%屈服应力为至少6.98×10 7 N / m 2。 通过仅增加目标的凸缘部的机械强度,可以抑制溅射时的靶的变形,而且,可以制造高度均匀的薄膜,而不会有现有技术的可变溅射特性。 结果,可以提高半导体产品的可靠性和产量,其小型化和高集成度不断前进。
摘要:
Embodiments of the invention relate to systems and methods for casting hybrid rocket motor fuel grains. In one embodiment, a method for casting a rocket motor fuel grain can be provided. The method can include providing a positive image of a port made from at least one material. The method can further include disposing at least one fuel material around at least a portion of the positive image of the port. Further, the method can include removing the at least one material, wherein a negative image of the port is formed in the at least one fuel material.
摘要:
The invention provides an extendible member (10) which is configurable between a coiled form (11) and an extended form (12). The extendible member (10) comprises: a primary member (14) comprising a sheet of material resiliently biased in a slit tube form, wherein the slit tube can be opened out at the slit to assume an open form in which it has a flattened cross section; at least one resilient secondary member (15) having first and second connections to the primary member (14) at respective different circumferential positions on the primary member (14), wherein in the extended form, the primary member (14) is in its slit tube form and the resiliency of the secondary member (15) causes at least part of the secondary member (15) to displace towards the slit in the primary member (14) to provide torsional and axial stiffness to the primary member (14), and wherein in the coiled form (11), the primary member (14) is in its open form and the secondary member (15) conforms to the flattened cross section of the primary member (149 so that primary and secondary member can be co-coiled. Corresponding methods are also provided.
摘要:
Die Erfindung betrifft eine Vorrichtung zum schichtweisen Aufbau von Modellen, aufweisend eine höhenverfahrbare Werkstückplattform, eine Dosiervorrichtung zum Aufbringen von Bindemittel auf die Werkstückplattform, wobei die Vorrichtung zusätzlich eine Montageplattform aufweist, an die alle Verfahreinrichtungen der Dosiervorrichtung und der Werkstückplattform angebracht sind.
摘要:
This invention concerns an active reconfigurable stretch forming tool, and in another aspect the invention is a method of stretch forming. The tool comprises an array of extensible shape forming elements which are driven in extension to produce the same force per unit area across a workpiece during shape forming. An array of limit switches are located in front of the array of shape forming elements, such that each shape forming element is driven in extension towards a respective limit switch during shape forming. In use, each limit switch is activated by the workpiece as it is shaped and each switch, upon activation, prevents further extension of the respective driven element. The tool and method are useful in the forming of three dimensional shapes in solid sheet metal or mesh, to produce panels for reflector antennas.
摘要:
Die Erfindung betrifft unter anderem ein Verfahren zur Herstellung eines einen Flanschabschnitt (28) aufweisenden Elementes (21), insbesondere eines Bremszylinders, welches wenigstens einen an dem Flanschabschnitt (28) angeordneten Stutzen (14, 26), z. B einen Druckluft-Einleitungsstutzen, umfasst, dem wenigstens eine Funktionsfläche (15, 19), wie beispielsweise eine Gewindefläche oder eine Dichtfläche zugeordnet ist. Die Besonderheit besteht darin, a) dass ein metallisches, im wesentlichen plattenförmiges Werkstück (10), insbesondere eine Ronde, bereitgestellt wird, b) dass das Werkstück (10) zur Bildung einer in eine erste Richtung (b) hin vorstehende Ausbuchtung (13) tiefgezogen wird, und c) dass die Ausbuchtung (13) zur Bildung eines doppelwandigen Stutzens (14, 26) teilweise, unter Belassung eines Abschnittes (h 5 ) der Ausbuchtung (13), in eine zweite, der ersten Richtung (b) entgegengesetzte Richtung (a) hin, umgestülpt wird.
摘要:
A method of making a knob (30) and ferrule (50) for a captive screw (10) is disclosed, the knob (30) integrally attached to the screw (10), the ferrule (50) attachable to a panel (60). The method of making the knob (30) includes providing an aluminum alloy base metal for the knob (30), pressing by cold-forming the base material into a generally cylindrical cup-shaped article (32) using at least one pressing operation, the cup having a generally cylindrical side wall (33), removing any base material situated outside of the perimeter of the cup-shaped article (32) and providing a hole in the bottom of the cup (32), coaxial with the hollow cylindrical walls (33) of the cup (32), thereby forming the knob (30).
摘要:
A device for forming bow springs in a one-piece centralizer includes a swing arm that is configured to receive the one-piece centralizer. The device and process using the device include mechanically applying, with a press, an external load onto an un-formed bow spring positioned on a form of the swing arm. When the load is applied with the device, the un-formed centralizer is forced downward to allow the bow spring to take the desired form/shape/geometry, length, and height of a formed bow spring.