In recent decades, the demand for cold-rolled steel sheets has remarkably increased. To prevent the sheets from rusting before the manufacturing process, a layer of rust-preventive oil has to be coated on the sheets. ...In recent decades, the demand for cold-rolled steel sheets has remarkably increased. To prevent the sheets from rusting before the manufacturing process, a layer of rust-preventive oil has to be coated on the sheets. In this study, the shipment and storage environments were simulated through a salt spray test and a damp-heat experiment, respectively, and the packaging status of the sheets was imitated by a laminated sheet test. The protection effect of oil on the steel sheet was investigated under the different environmental conditions and oil weights by using electrochemical approaches, scanning electron microscopy （ SEM）, and X-ray diffraction （XRD） techniques. It was found that chloride ions had more severe effects on the corrosion resistance of the oils than hydrothermal conditions did. This was shown in the sheets with oil weights of 0.4,0.9 ,and 1.2 g · m^-2 ,which were too severely corroded after a four-hour salt spraying test to meet the demands of subsequent processing. However, the sheets showed satisfactory corrosion resistance after a three-week damp-heat experiment with a temperature of 49 ℃ and 95 % RH. In addition, it was disclosed that the penetration of the chloride ions determined the protection mechanism of the oil, i. e.,the corrosion resistance was initially enhanced by the increase in the oil content. As long as the chloride ion reached the interface between the oil film and the sheet, the oil distribution became the predominant factor in the protection of the sheet. The corrosion mechanism of the steel sheet was dependent on the stacking style of the sample. When exposed to air, the corrosion product of the sample was rust red with a composition of Fe2O3, whereas the black product that is mainly composed of Fe3O4 was found on the edge of the laminated sheets, which resulted from the oxygen concentration cell.展开更多
该文通过嵌入式WinCE系统,使用C++编程语言,在Visual Studio 2008环境中开发了码垛机器人垛型生成和编辑界面。该系统通过离线编程,根据产品的实际尺寸,以及系统相关设定参数,创建码垛数据。本系统能够设计的码垛数据,不仅能够实现每次...该文通过嵌入式WinCE系统,使用C++编程语言,在Visual Studio 2008环境中开发了码垛机器人垛型生成和编辑界面。该系统通过离线编程,根据产品的实际尺寸,以及系统相关设定参数,创建码垛数据。本系统能够设计的码垛数据,不仅能够实现每次规则抓取的袋子和箱子类产品;还能实现每次不规则抓取的产品尺寸和数量。本码垛工具的设计原则,采用基于终端客户的思想,即可视化编辑界面、即见即所得的产品布局,最大程度地减轻客户产品码垛类型设计负担,提高了客户可应用性和生产效率。展开更多
Rockery building and stone stacking is a technique commonly used in building of classical gardens.Its emergence allows the fairy thought of"one pond and three mountains"to be reflected in different classical...Rockery building and stone stacking is a technique commonly used in building of classical gardens.Its emergence allows the fairy thought of"one pond and three mountains"to be reflected in different classical gardens.In the Northern Song Dynasty,the style of rockery building and stone stacking in the royal garden was an artistic climax in the history of the garden,and the technique of rockery building and stone stacking in Genyue Royal Garden was considered as the beginning of specialization.Through sorting out the records of the royal gardens in the Song Dynasty,this paper summarized the content of studying the royal gardens of the Song Dynasty,and systematically sorted out the development history of the techniques and styles of the royal gardens of the Song Dynasty and applied them into construction of some gardens.展开更多
文摘In recent decades, the demand for cold-rolled steel sheets has remarkably increased. To prevent the sheets from rusting before the manufacturing process, a layer of rust-preventive oil has to be coated on the sheets. In this study, the shipment and storage environments were simulated through a salt spray test and a damp-heat experiment, respectively, and the packaging status of the sheets was imitated by a laminated sheet test. The protection effect of oil on the steel sheet was investigated under the different environmental conditions and oil weights by using electrochemical approaches, scanning electron microscopy （ SEM）, and X-ray diffraction （XRD） techniques. It was found that chloride ions had more severe effects on the corrosion resistance of the oils than hydrothermal conditions did. This was shown in the sheets with oil weights of 0.4,0.9 ,and 1.2 g · m^-2 ,which were too severely corroded after a four-hour salt spraying test to meet the demands of subsequent processing. However, the sheets showed satisfactory corrosion resistance after a three-week damp-heat experiment with a temperature of 49 ℃ and 95 % RH. In addition, it was disclosed that the penetration of the chloride ions determined the protection mechanism of the oil, i. e.,the corrosion resistance was initially enhanced by the increase in the oil content. As long as the chloride ion reached the interface between the oil film and the sheet, the oil distribution became the predominant factor in the protection of the sheet. The corrosion mechanism of the steel sheet was dependent on the stacking style of the sample. When exposed to air, the corrosion product of the sample was rust red with a composition of Fe2O3, whereas the black product that is mainly composed of Fe3O4 was found on the edge of the laminated sheets, which resulted from the oxygen concentration cell.
文摘该文通过嵌入式WinCE系统,使用C++编程语言,在Visual Studio 2008环境中开发了码垛机器人垛型生成和编辑界面。该系统通过离线编程,根据产品的实际尺寸,以及系统相关设定参数,创建码垛数据。本系统能够设计的码垛数据,不仅能够实现每次规则抓取的袋子和箱子类产品;还能实现每次不规则抓取的产品尺寸和数量。本码垛工具的设计原则,采用基于终端客户的思想,即可视化编辑界面、即见即所得的产品布局,最大程度地减轻客户产品码垛类型设计负担,提高了客户可应用性和生产效率。
文摘Rockery building and stone stacking is a technique commonly used in building of classical gardens.Its emergence allows the fairy thought of"one pond and three mountains"to be reflected in different classical gardens.In the Northern Song Dynasty,the style of rockery building and stone stacking in the royal garden was an artistic climax in the history of the garden,and the technique of rockery building and stone stacking in Genyue Royal Garden was considered as the beginning of specialization.Through sorting out the records of the royal gardens in the Song Dynasty,this paper summarized the content of studying the royal gardens of the Song Dynasty,and systematically sorted out the development history of the techniques and styles of the royal gardens of the Song Dynasty and applied them into construction of some gardens.
