郑新立：汽车产业前景可期国内车企应抓住时机做大做强

2013年中国汽车发展国际论坛领袖峰会盛大开幕，本次论坛对“新环境下中国汽车产业的责任和未来”的主题进行了探讨。主要有两方面内容：     

奔驰722.9自动变速器机械传动与油路分析(七)

<正>本期分析奔驰722.9自动变速器倒挡机械传动与油路工作流程,如图13所示,看机械元件工作表得知,挂入倒挡时,B3制动器开始工作,目的是制动前排的大内齿圈,BR制动器开始工作,目的是制动后排的行星架和中间排的内齿圈,K3离合器开始工作,把后排太阳轮和中间排太阳轮联接成为一个整体。     

提高隧道内整体道床翻修施工中支承块安装精度的措施

如何提高支承块的安装精度,一直是运营线隧道内整体道床翻修施工中致力解决的问题。从施工过程中几个关键环节,分析隧道内整体道床翻修施工中支承块安装出现误差的原因,提出提高支承块安装精度的措施。     

提高汽车产品竞争力的模内装饰工艺2008模内装饰国际研讨会一瞥

目前,模内装饰工艺主要应用在汽车仪表板、中空面板、门板嵌件、装饰条等内饰产品,及汽车保险杠、后视镜、门板的扶手等外饰产品.     

Correlation analysis between the interface membrane and loose hip prosthesis

Objective To analyze the cause of prosthesis loosening by observing the interface membranes harvested during the hip restoration operation. Methods A total of 28 specimens of interface membrane around the loose prosthesis were harvested from 28 patients undergoing the restoration of total hip replacement. All the specimens underwent the observation of appearance, light microscopy and scanning electronic microscopy(SEM). Results All the gaps around the loose prosthesis were filled with interface membrane of different thickness. The color of the most interface membrane was madder red, and the other one third of membrane was black. The comparatively thicker membrane was similar to scar connective tissue while the thinner was similar to fiber membrane. A large number of wear debris, macrophages and foreign-body giant cells were found under light microscope. With SEM observation a large number of different diameter collagen fibra structures that looked like scar tissues were arranged disorderly in a great mass, foreign particles and bone debris of different size were distributed unevenly, and the fibroblast was distributed in the collagen fiber. Conclusion Wear debris is related to inflammatory cell response around the interface membrane of the loose prosthesis. The wear debris engulfed by macrophage stimulates the interface membrane to release bone resorption factors (such as TNF) which lead to osteolysis, and this is one of the most important causes of the prosthesis loosening.     

货车钩舌销孔内壁无损检测方法探讨

针对货车厂修时,如何发现13、13A钩舌销孔内表面缺陷,提出了相应的解决措施,保证了货车运行的安全性。     

大型内齿圈齿形的加工

利用线切割机和计算机辅助设计CAD/CAM转换软件,及自行设计配套工装,按照图纸技术要求加工出外径Φ4500 mm,分度圆直度为Φ3888 mm的大型内齿圈内齿,从而解决以我们目前设备无法加工的难题。     

宁波恒通液压马达有限公司

宁波恒通液压马达有限公司是设计、制造内曲线液压马达、曲轴液压马达、液压绞车、液压回转器、静液压驱动装置及各类液压系统的专业企业。公司的主营产品是为工程机械、船舶机械、煤炭机械、冶金机械等领域提供全系列MS系列（赫格隆、波克兰、力士乐、萨奥等进口马达的互换品）、HT系列、QJM系列及HBM系列的低速大扭矩液压马达、液压绞车、回转装置等液压产品。     

剪力墙结构设计中墙厚问题探讨

文章通过剪力墙计算,指出墙体厚度在剪力墙结构设计中的作用,在设计和审图过程中,如何把握三种规范对剪力墙最小厚度的规定,以及墙体厚度减小后的意义。     

对氨合成塔系统改造后的运行分析

以油田气为原料的氮肥厂,在引进瑞士Casale氨合成塔内件投产后,由于一些主要工艺指标未达到设计值,三年以后相继对塔内件和系统中的氨分离器内件、冷凝塔的分离段及滤油器内件等设备进行了改造,使合成氨产量有了明显提高,系统操作状况也得以明显改善.取得了较好的经济效益和社会效益.