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81results about How to "Less dense" patented technology

Electric vehicles

Electric vehicles usually inherit a chassis of a pressed steel construction from a conventional vehicle design. This imposes a substantial weight penalty on the vehicle. We disclose a chassis element for a vehicle, formed of an outer skin material, an inner core material enveloped by the outer skin material, and at least one array of aligned fibres, and comprising a restraint for an electrical battery adapted to locate the battery over the at least one array. There can be multiple arrays of aligned fibres, preferably disposed at a transverse angle relative to each other of less than 90°. We particularly prefer three arrays of aligned fibres, which can be disposed relative to each other at an angle of 60°. The fibres can be disposed within the skin material. The restraint ideally comprises an upstanding wall which will serve to confine the batteries in the event of a collision or other sudden movement, but will allow them to be replaced easily for maintenance purposes or to replace an exhausted set of batteries with a charged set. Alternatively, the restraint can comprise an attachment point for the battery. The core material is preferably less dense than the skin material, thereby allowing the composite element to have a light weight and a high rigidity. The application also relates to a vehicle comprising a chassis, an electric motor, a chassis element as set out above, and electrical connections from the battery to the motor, wherein the chassis element is attached to the chassis via removable fixings extending through the fixing points of the chassis element into corresponding fixing points on the chassis
Owner:GORDON MURRAY TECH LTD

Method for preparing copper alloy additive material based on electron beam powder laying forming

ActiveCN109202081AAdditive Manufacturing PremiumAdditive manufacturing is efficientAdditive manufacturing apparatusIncreasing energy efficiencyManufacturing technologyMolding machine
The invention discloses a method for preparing a copper alloy additive material based on electron beam powder laying forming. The method comprises steps that an obtained STL format file is inputted into rapid forming software of a molding machine; a layer of copper alloy powder is spread on a forming platform in advance, and an electron beam preheats a substrate and a powder bed; the outline is melt, and the electron beam scans the boundary in a spotted mode; the cross section is melt, and an electron beam linear scanning cross-section beam current value is increased from 5.5 mA to 7 mA over time; the process is repeated till manufacturing of copper alloy parts is completed. The method is advantaged in that the method is the additive material manufacturing technology utilizing powder laying electron beam selective zone melting, due to substrate and powder bed preheating and beam incremental scanning modes of the electron beam before melting, warping and non-dense organization caused bythe residual stress in the forming process are effectively reduced, the phenomenon of overheating or spheroidization of formed parts is avoided, and thereby high quality and efficient additive material manufacturing of the copper alloy is achieved.
Owner:ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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