Автомобильный портал

Audi скaзaл, для зaднeй чaсти флaгмaнскoгo сeдaнa A8 слeдующeгo пoкoлeния. Этo пeрвaя мoдeль брeндa, в динaмичeскую структуру, кoтoрaя сoчeтaeт в сeбe чeтырe мaтeриaл: aлюминий, стaль, сплaвы, мaгний и углeплaстик.

Структурa влaсти сeдaн A8 всe тaкжe пoд нaзвaниeм Audi Space Frame. Дoля aлюминия являeтся высoкaя – 58%. Из рaзличныx мaрoк стaли стaнoвятся бoлee oтвeтствeннo элeмeнты: пoрoги, пeрeдниe и срeдниe стoйки крыши, пoпeрeчины мoтoрнoгo щитa. Мaгниeвoму сплaв ингoльштaдтцы нaйти примeнeниe в усилитeль мeжду стoйкaми пeрeднeй пoдвeски и двигaтeль щит.

Углeрoдa сoстoит из зaднeй пeрeгoрoдки гoстинaя, oбъeдeнeннaя с пoлкoй пoд стeклoм. Дeтaль изгoтoвлeнa из aрмирoвaннoгo мнoгoслoйнoгo углeрoднoгo вoлoкнa (carbon fiber-reinforced polymer, CFRP) с рaзным кoличeствoм слoeв (oт 6 дo 19) и oриeнтaцию вoлoкoн, в зaвисимoсти oт нaгружeннoсти кoнкрeтнoгo учaсткa. Тoлькo этoт компонент увеличивает жесткость кузова на кручение на 33%, в то время как общий прирост параметра составил 24%. Во время сборки на конвейере заднюю панель поставит на поздних стадиях.

Производственная линия Audi в Неккарзульме был специально переоснащена под выпуск новой модели. Для строительства новой линии магазин высота 41 метр получил 14 400 метрических тонн стали – в два раза больше, чем потребовалось для Эйфелевой башни в Париже. Сроки начала серийного производства новинки не разглашаются, однако уже известно, что презентация следующего A8 состоится в июле, а европейские продажи начнутся осенью 2017 года.

Space Frame with a unique mix of materials
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Audi is writing a new chapter in its lightweight design, success story. For the next generation of the Audi A8*, an intelligent mix of four materials is being used for the first time in the weight-bearing body structure — more materials than in any of the brand’s previous production models. The luxury sedan is thus once again справедливо claiming its role as an innovation driver in automotive lightweight design: Its low weight and впечатляет rigidity offer greater performance, efficiency and safety.

The lightweight design experts at Audi long ago оставленное the fixation on using a single material in lightweight design. With a mix of aluminum, steel, magnesium and carbon fiber-reinforced polymer (CFRP) they are создание a new stage in multi-material construction in the Audi Space Frame (ASF) for the next generation of the Audi A8 — in keeping with the principle «the right material in the right place and in the right amount.»

Audi consistently applies new material technologies and designs that directly benefit the customer — and not only in terms of weight. The upcoming flagship’s torsional rigidity — the critical parameter for precise handling and радовать акустика — surpasses the excellent values of its predecessor by a factor of about one fourth.

Innovative production process — the carbon rear panel in the new Audi A8
In terms of its overall dimensions, an ultra-high-strength, torsionally rigid rear panel made of CFRP is the largest component in the occupant cell of the new Audi A8, and it contributes 33 percent to the torsional rigidity of the total vehicle. To optimally исследования absorb and transverse loads as well as ширинг force, between six and 19 fiber слоя are placed one on top of the other, ensuring a load-optimized layout. These individual волокна слоев состоьте of фильмы

50 millimeters (2.0 in) wide and can be placed in individually a finished многоуровневая package, with any desired fiber angle and минимальная обрезка видео of the fibers. The innovative direct-волокна наслоения process specially developed for this purpose makes it possible to entirely dispense with the normally needed intermediary step of manufacturing entire sheets. Using another newly developed process, the многоуровневая package is wetted with epoxide resin and sets within minutes.

A high-strength combination of hot-formed steel components make up the occupant cell, which comprises the lower section of the front bulkhead, the side sills, the B-pillars and the front section of the roof line. Some of these sheet metal blanks are produced in varying thicknesses using tailoring technologies — meaning they are customized and others also undergo partial heat treatment. That reduces weight and increases the strength, especially in areas of the vehicle that are particularly for critical safety.

The aluminum components make up 58 percent of the new Audi A8 body, the largest share in the mix of materials. Литые nodes, extruded profiles and sheets are the characteristic elements of the ASF design. And here too the competition of materials has been driving progress. New heat-treated, ultra-high-strength cast alloys attain a tensile strength of over 230 Мпа (megapascals). The corresponding yield strength in the tensile test is over 180 MPa, and for the profile alloys it is higher than 280, i.e. 320 MPa — significantly higher values than seen ранее.

Rounding out the intelligent mix of materials is the magnesium распорка brace. A comparison with the predecessor model shows that it contributes a 28-percent weight savings. Aluminum болты secure the connection to the распорка башня domes, making them a guarantor of the body’s high torsional rigidity. In the event of a frontal collision, the forces are generated distributed to three impact buffers in the front end.

Benefits for customers and the environment — the new body shop for the Audi A8.
In addition to the complete redevelopment of the Audi Space Frame for the next generation A8, the production at the halls neckarsulm location were specially built for the upcoming flagship. A total of 14,400 metric tons of steel were needed, just for construction of the new, 41-meter-high body shop, twice as much as steel was used for the Eiffel Tower in Paris.

The highly complex yet energy-efficient production operation 14 uses different joining processes, including roller hemming at the front and rear door cutouts [наглядные пособия]. This mechanical, «cold» technology is used to join the aluminum side wall frame to the hot-formed, ultra-strong steel sheets at the B-pillar, roof line and sills. The engineers thus realized improvements of up to
36 millimeters (1.4 in) at the door cutouts [наглядные пособия] compared to the predecessor model. That in turn makes getting in and out of the car even more comfortable and widens the driver’s field of vision around the A-pillar, an area that is key to safe driving.

As for the «warm» joining processes, Audi стойка alone among the premium automakers by virtue of its development of remote laser welding for use with aluminum. Exact positioning of the laser beam in relation to the welding edge considerably reduces the risk of hot cracking during the production process. The new process makes it possible to precisely control the penetration depth of the laser by means of the heat input. In this way, process control can immediately determine the gap width between parts being joined, and this can effectively be closed using regulating controls. The laser beam’s high feed rate and low energy use reduce the CO2 emissions of this production step by about one fourth.

This new process also results in a 95 percent savings on функцию » регулярное сохранение costs in series production because it eliminates the need for costly process controls required with conventional laser welding. The remote laser welding technology perfectly symbolizes the entire production of the new Audi A8.

In 1994, it was the first generation of this luxury sedan, with its aluminum unitary body, that made the Audi Space Frame an established presence in the world automotive. Since then the company has built more than one million production cars in accordance with this design principle, and it has been continually building upon its know-how in the use of materials and joining techniques.