摘要:
A method of making a tailored blank comprising the following steps: (a) friction welding first and second structural members together at a substantially right angle with respect to each other to form an intersection comprising a first joining surface formed by adjoining bottom faces of the first and second structural members, and a second joining surface formed by an angled face of the first structural member that is disposed at a first oblique angle relative to the bottom face of the first structural member; (b) friction welding the first joining surface of the intersection to a first portion of a surface of a base member; and (c) concurrently linear friction welding first and second joining surfaces of a third structural member to the second joining surface of the intersection and to a second portion of the surface of the base member respectively.
摘要:
A method of making tailored blanks in accordance with one embodiment comprises the steps of friction welding a first joining surface of a first structural member having a substantially non-rectangular parallelogram profile to a first portion of a joining surface of a substrate; and thereafter concurrently linear friction welding first and second joining surfaces of a second structural member having a substantially non-rectangular parallelogram profile to a second portion of the surface of the substrate and to a second joining surface of the first structural member respectively. The first and second portions of the surface of the substrate are adjacent. Two or more structural members having a substantially non-rectangular parallelogram profile can be linear friction welded in succession to the substrate and to each other, thereby building a structural assembly having a long flange or other long feature of a desired length.
摘要:
An assembly for positioning a structural assembly for friction stir welding, and a system and method for friction stir welding the structural assembly are provided. The assembly includes a substrate defining a recessed pattern therein, and at least one structural member positioned within the recessed pattern to at least partially secure the structural member therein. The structural member is positioned adjacent to the substrate and within the recessed pattern such that the substrate and structural member are formed of materials capable of being friction stir welded together.
摘要:
The present invention is a method for producing an insulin-secreting pre-adipocyte stem cell and the cells derived therefrom. The preferred method comprises obtaining fat cells from a human; treating the fat cells with low-level laser energy; culturing the treated fat cells and suspending them in media together with an insulin gene plasmid; and subjecting the fat cells to transfection. The transfection is facilitated with the application of low-level laser energy.
摘要:
The present invention provides a method for producing a structurally stable collagen producing mesenchymal pre-adipocyte stem cell and the cells derived therefrom by obtaining fat stem cells from a patient; centrifuging and washing the fat stem cells, culturing the fat stem cells and suspending them in media together with mesenchymal stem cells; and subjecting the fat stem cells to transfection via electroporation using a precisely controlled low voltage, pulsed, electrical field.
摘要:
A curved extrusion includes a body that has indefinite length and a cross-section, and that is formed to contour and at least one channel cut into the cross-section that is filled with deposited material such that said cross-section of said body is restored. By cutting the channels into the cross-section of the extrusion, the extrusion may be easily formed onto a contoured tool to be curved with lower forming and residual stresses and distortion. By filling the channels with deposited material, the original cross-section and strength of the extrusion can be restored. By adding a transverse stiffener, the strength of the original extrusion may not only be restored but also further improved. By depositing material to create structural features the cross-section of the extrusion may be locally changed. The method for forming curved extrusions of the present invention may be used, for example, to produce T-chords of an aircraft.
摘要:
A preform and method for forming a structural assembly are provided. The preform can be formed by friction welding structural members to a base member and subsequently providing a connection material to join the structural members. The resulting preform can be formed with dimensions and a configuration that approximate the dimensions and configuration of the structural assembly. Thus, the structural assembly can be formed by joining multiple members that are generally smaller than the finished assembly.
摘要:
In one embodiment of the present disclosure, a method for improving communication between a transmitter and a receiver is disclosed. The method can include receiving a first signal having a first power level over a first path, receiving a second signal having a second power level over a second path wherein the first path is different than the second path. The method can compare the first power level with the second power and determine a difference between the first power level and the second power level. The method can also adjusting a parameter in the system to reduce the difference in power levels between the first and second signals compensating for interference cause by many sources.
摘要:
A structural assembly and a preform and method for forming the structural assembly are provided. The preform can be formed by linear friction welding structural members to a base member and friction welding each structural member to at least one of the other structural members. The resulting preform can be formed with dimensions and a configuration that approximate the dimensions and configuration of the structural assembly. Thus, the structural assembly can be formed by joining multiple members that are generally smaller than the finished assembly.
摘要:
A preform and method for forming preforms and structural members are provided. The preform can be formed by cold spraying a structural material onto a base member, such that the preform has dimensions approximating the dimensions of the machined structural member to thereby reduce material waste and machining time when forming the structural member from the preform. In addition, the preforms can be plastically deformed to more closely correspond with the desired dimensions of the structural member. Further, hydrogen can be provided in a mixed stream of gas and structural material for spraying, and the resulting structural member can be subjected to a sub-atmospheric pressure to release hydrogen therefrom.