汽车厂工具制造中的五轴铣

汽车车身现今通常是借助CAD系统设计的，并用计算机内部的表面模型加以描述。根据CAD-数字模型来制造各种硬模、模型和模具，其目的在于待这些模型数据以最佳方式反映到工件上。车身外皮的5轴铣在梅塞德斯-本茨公司工具车间的应用已有11年的历史。本文虽重点介绍车身的5轴铣，但对于各种复杂模具如增压器叶轮及其模具同样适用。     

采用铣刨工艺是保证高等级道路养护质量的必要条件

基于提高高等级道路的作业质量和降低工程成本的目的,根据道路的固有特点,分析采用路面铣刨工艺的必要性和技术可行性。     

水泥稳定废旧沥青铣刨料再生材料性能试验研究

随着工程建设项目的环保、节能要求越来越高,国内普通公路建设对旧路面材料再生利用的要求逐渐成为旧路改造项目的关键技术点,而废旧沥青铣刨料柔性再生受技术和造价影响,推广程度一般.通过试验对水泥稳定废旧沥青铣刨料各项路用性能的研究,探讨废旧沥青铣刨料再利用的可行性.     

广西地区高速公路沥青路面养护措施评价研究

针对目前广西地区高速公路沥青路面养护状况,文章依托实体工程,通过路面养护数据和使用性能检测数据的收集、整理和分析,对微表处、不同厚度的铣刨重铺等常用沥青路面养护措施的使用效果进行评价,其对广西地区高速公路沥青路面养护方案的制定具有借鉴意义。     

XM-1800铣磨车车轴齿轮箱“零侧隙”齿轮传动换挡机构设计

介绍现有两种典型车轴齿轮箱换挡机构的结构组成,分析其结构特点对齿轮传动侧隙的影响。提出"零侧隙"齿轮传动换挡机构结构设计,分析其换挡原理和可行性。     

浅谈沥青路面预防性养护体系技术要点

对路面缝隙的处理,由原来的间接加热灌缝,改革成胶条式直接加热焊灌缝;对路、桥面的流滑拥包由原来的稀浆封层养护,改革成刨铣凿槽处理;对路、桥面渗漏水的处理,由原来的覆盖式养护,改革成渗透修复式养护;路、桥面防撞墙,护栏底座,箱梁等部位均采用硅烷基养护材料。该养护体系全方位将桥梁、路面进行预养护,表现出施工简单、挥发损失少、材料用量省及环境污染少等特点,在路、桥预养护方面具有很好的应用价值。     

沥青路面路侧震鸣带的设计与评价

就江西省石吉（石城—吉安）高速公路沥青路面铣磨式震鸣带试验段的设计与施工进行了介绍,通过对比分析震鸣带设置前后交通事故数量的变化,说明了震鸣带作为交通安全工程设施的实用性和有效性。     

Normal reference value of forced vital capacity of Chinese younger women and geographical factors

Objective To supply a scientific basis for standardizing the normal reference value of forced vital capacity (FVC) of Chinese younger women. Methods We studied the relationship between the normal reference value of 21767 samples of FVC of younger women and eight geographical factors in 157 areas in China. Results It was found that the correlation between geographical factors and the normal reference value of FVC of younger women was quite significant (F=5.884, P=0.000). By adopting the method of mathematical regression analysis, one regression equation was inferred: =3.146+0.00006919X1+0.01315X4-0.006966X6+0.09524X8±0.254. In the above equation, is the normal reference value of younger women' FVC (L); X1 is the altitude (m); X4 is the annual mean air temperature (℃); X6 is the annual mean relative humidity (%); X8 is the annual mean wind speed (m/s); 0.254 is the value of the residual standard deviation. Conclusion If geographical values are obtained in a certain area, the normal reference value of FVC of younger women in this area can be obtained by using the regression equation. Furthermore, according to the geographical factors, China can be divided into eight regions: Northeast China Region, North China Region, Shanxi-Shaanxi-Inner Mongolia Region, middle and lower reaches of the Yangzte River Region, Southeast China Region, Northwest China Region, Southwest China Region, and Qinghai-Tibet Plateau Region.