《专业英语论文考核》
专业年级 机械电子141
姓 名 韦 继 虎
学 号 **********
指导教师 董 文 彬
完成时间 2017年6月10日
一个半小时的英文
白领和蓝领的区别
窗体顶端
Application and Development of Lightweight Material for Automobile
窗体底端
财源滚滚的对联Abstract
Car lightweight is an important means to achieve energy-saving emission reduction and methods, in improving the fuel economy and environmental protection has an important role. At prent, the lightweight new material is the main way of the current body weight reduction, through the multi-material structure optimization, both to improve vehicle performance, but also significantly reduce the quality. This chapter discuss the performance and application of veral lightweight materials, describes the development of lightweight materials in the automotive industry and the application of the trend
生产车间质量管理Key words: 主持人的英文automotive ；lightweight ；lightweight materials
Preface
窗体顶端
窗体顶端
The study of lightweight car is a mainstream of modern car design and manufacturing. Car lightweight, is to ensure the strength and safety of the car under the premi of the car as much as possible to reduce the quality of the preparation, thereby enhancing the vehicle's power, reduce fuel consumption and reduce exhaust pollution. Data show that if the car to reduce the quality of 10%, fuel efficiency can be incread by 6% to 8%, fuel consumption can be reduced by 6% to 10%. Fuel consumption decline, emissions also decread, while resource utilization incread, extended life of the car, the u of performance has improved significantly. Car body quality accounts for about 50% of the quality of the vehicle, it is clear that the lightweight body for the vehicle lightweight play a pivotal role [1]. At prent, the car body weight reduction has two main rearch directions: First, the u of lightweight materials; Second, optimize the structure. Structural optimization potential space has been very small, the gradual u of lightweight new materials is the current body of one of the main means of lightweight.
手工日历简单又漂亮
1 New high strength steel
In recent years, with the progress of metallurgical technology, on the basis of high-strength steel, with ultra-low carbon as the basic characteristics, and gradually formed with deep drawing, high strength, baking hardening performance of new high-strength steel. At prent, the u of high-strength automotive body is mainly sheet metal and pipe. Mainly: (1) BH steel (bake hardening steel). BH steel plate yield strength in the baking paint incread, without loss of formability under the premi of improving the anti-depression, can reduce the steel plate, mainly for high strength and difficult to form parts, such as roof, Doors, luggage and other components, the main u of tensile strength of 340 ~ 390MPa BH steel plate. (2) RIP steel (pha change induced plastic steel). Mainly ud for the collision must absorb more energy when the high-strength structural parts, such as body frame. (3) MS steel (martensitic pha steel). Ud to hit the high impact parts, that is, in a very short collision deformation stroke to absorb a lot of energy, such as side crash protection. (4) boron steel. Ud to require high strength and high degree of molding of parts, can minimize the quality. Such as A, B column reinforce
ment, etc. [2].干部考察方案
Practice has proved that when the thickness of the steel were reduced 0.05,0.10,0.15 mm, the body weight loss were 6%, 12%, 18%. In terms of development trends, the u of new high-strength steel plate in the body is constantly thinning, while the body strength has incread, while increasing the safety of the car, reducing noi and vibration, improve fuel efficiency and reduce the overall quality of the car. The cost did not increa, while the acceleration, driving performance has improved. Whether from the cost point of view, or from the performance point of view, the new high-strength steel plate is to meet the lightweight body to improve the safety of the collision of the best materials. The proportion of new high-strength steel plates ud in various automobile factories is increasing. Japan's Mitsubishi Pajero (SPORT) for the company's latest SUV car designed a new body structure, body 70% of the components made of high-strength steel plate, the vehicle's torsional stiffness even higher than the Grand Cherokee 45% Body carrying capacity of up to 2t or more. Ford's Windstar body frame 60% is high strength steel. Toyota's new Vitz body structure in high-strength steel accounted for 48%, than the
company's Starlet car to reduce the quality of 17kg.
However, the high strength of the steel sheet is liable to cau a decrea in plasticity, a poor formability, and an increa in yield strength, which caus surface distortion and springback, and increas the shape's instability. Thus, high strength steel sheets are a difficult to form material. Thermoforming technology is a new type of high-strength stamping parts for the advanced manufacturing technology, can be ud to form a strength of up to 1500MPa stamping parts, including the thermoforming process is stamping The frontier technology of the field can be widely ud in the production of front and rear bumper, A-pillar, B-pillar, C-pillar, roof structure, door interior plate, door anti-collision beam and other components.
2 light alloy material
2.1 aluminum and aluminum alloy
Aluminum is the ideal choice for lightweight car, the resource is wide, lightweight, recyclin
g, saving resources, absorbing impact energy, corrosion resistance, is the best overall performance of the basic material. The aluminum alloy ud in the body is mainly deformed aluminum alloy, mainly AI-Cu-Mg system (2000 ries), AI-Mg system (5000 ries), AI-Mg-Si ries (6000 ries), AI-Mg- Zn-Cu system. Which 2000 ries and 6000 ries is heat treatment can strengthen the alloy, while the 5000 ries is heat treatment can not strengthen the alloy. The former through the coating drying process after the strength is improved, mainly for the body outside the board and other emphasis on strength, stiffness of the site, such as car cover, hood, lift rear door, front fender, etc .; the latter excellent shape, Mainly ud in the body plate and other complex parts of the shape, such as car floor structure and so on. At prent, low density, high strength, high elastic modulus and superplasticity of the AI-Li alloy and aluminum anti-vibration plate, etc. has been gradually applied to the body.
从事专业技术工作
