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Lightweight castings increased emphasis on reducing vehicle weight; use of casting, the traditional red welding of structural
components, due to limitations of materials and manufacturing processes, such as the thickness of each part can only be, in order
to ensure that the parts of the overall strength and stiffness, are more often red thick weldment. Structural components can be
CAE finite element analysis software, to optimize the structure, according to the various parts of the force designed complex
variable thickness, variable cross-section of the structure, to ensure there is sufficient strength in the premise of the maximum
reduction of unnecessary partial thickness, and thus greatly reduce part weight. Less use of variable cross-section structure of
spring leaf spring, leaf spring as are the metal pieces, the weight is very large, reducing the weight of spring, is an important
measure to reduce the curb weight. Leaf spring is tapered less vertical direction by a few pieces of variable cross-section of
the leaf spring formed. Less variable cross-section leaf spring can not only reduce weight, but also by reducing the friction
between the spring and to improve ride comfort and prolong life. In addition the use of rubber suspension or air suspension can
also reduce the weight of the suspension system. Using single-beam frame, compared to steel springs, the weight of a larger
frame, effectively reducing the weight of the frame, it will greatly reduce the vehicle\\ s curb weight. With the design level, the
improvement of manufacturing processes, materials, improved performance, single-load operating conditions in the standard frame
is fully capable of. As China\\ s heavy truck severe overload, so before 2008, using the single beam of heavy trucks is almost
unthinkable. After 2008, domestic manufacturers began to be rolled out its lightweight products, the use of single-beam frame
structure. Use of composite materials, the cab is the largest assembly of composite materials, especially outside the coverage:
the front panel, including the corner boards, fenders, bumpers, and even the top cover, use a large number of composite
materials. In so doing, effectively reducing the vehicle weight, on the other hand the composite material forming good shape
structurally than the metal stamping parts can be more complex, more beautiful, more accurate size. At present the domestic heavy
truck cab still prefer all steel structure, mainly the poor and the Chinese heavy truck work environment: facing a lot of heavy
truck test and damage difficult to repair after damage to composite materials, improved vehicle repair and maintenance costs.
However, manufacturers of heavy trucks from the recent introduction of new products, the composite materials used in vehicle
gradual increase in the proportion of the extensive use of composite materials is an inevitable trend. Use of aluminum alloy,
aluminum alloy than steel density, so in some parts of composite materials can not be replaced, you can use aluminum materials,
including sheet metal parts and castings. Aluminum sheet metal that is most representative of the fuel tank, fuel tank aluminum
alloy, not only to reduce weight, but not easy to rust inside the tank, eliminating the periodic cleaning of the trouble. Body
can also be used instead of aluminum alloy cold-rolled steel. The United States to reduce the weight of heavy trucks, the use of
aluminum body, aluminum welding performance as poor, only riveting, so we see the long head of the United States are covered with
heavy truck rivets, very sturdy. Rims, engine block, transmission, body, etc., can also be extensive use of aluminum alloy
casting, you can ensure adequate strength, stiffness, while minimizing the weight. Use of high strength steel, other materials
can not be replaced in only the use of steel parts, the use of high strength steel plate, steel plate thickness can be thinned to
reduce weight. Used to produce cold-rolled steel body and frame made of hot-rolled steel, high strength steel can be used.
European and American heavy truck, heavy truck use of steel is almost 100% high strength steel. Before domestic heavy truck use
small proportion of high-strength steel, the increasingly widespread use in recent years, and even cars are beginning to use the
dump truck\\ s high-strength steel to enhance strength envelope, to reduce weight. Use of tailored blanks, steel stamping welded
together by a cab, due to various parts of the structure and force is different, so different parts of the sheet metal will be
using different grades of steel, a heavy truck\\ s cab may be used several dozens of different brands, different thickness of steel
plate. However, with the development of CAE technology, through simulation and analysis, can be calculated with a different sheet
metal parts of the force, in order to alleviate some of the unnecessary parts of local thickness, laser welding technology came
into being. Laser welding technology is handled by a different surface, different kinds of steel, two or more different thickness
of steel plate by laser welding method, a free combination of a steel plate. Such as tailor-welded steel plate. TWB is currently
in the application of large passenger cars, technology is very mature, Volkswagen, General Motors, Ford, Toyota, Honda, many of
our familiar brands in their large number of applications in automotive products, but in commercial vehicles, especially is not
much heavy truck use. As for the weight of heavy trucks are more sensitive to re-tailor welded blanks in a wide range of
applications on the card. Vacuum ultra-wide tires and the tire, reducing vehicle weight, tire can not be underestimated. Vacuum
tire and wide tire but also to some extent, reduce weight. Compared with conventional tires tire vacuum, not only to reduce the
inner tube, rim structure had been reduced accordingly, replaced all the vacuum vehicle tire, reducing the weight of the very
objective. Also driving the vacuum tire resistance, to a certain extent, reduce fuel consumption. Heavy truck driving wheel tires
are generally double, single wide tires if changed, will not only reduce the number of tires, rims can reduce the number of
weight loss results are quite remarkable. Another area of wide single tires better than dual tires small ground, in addition to
reducing weight, but also can improve the driving stability, to avoid double tire \"eat children\" phenomenon. Integration of parts
capabilities, reduce the number of parts, addition, integration of parts capabilities, integration of multiple components, to
achieve multi-functional components, reducing the number of parts to make the structure more compact, but also to a certain
extent, reduce vehicle weight. Such as: the combination of tank and table pedal, the fuel tank combined with SCR\\ s urea tank,
etc.
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