The Principle of Square Hole Machining and It＇s Tooling Structure Design

In order to meet the rapid needs of processing square hole in mechanical equipment, the paper expounds the square hole processing method： planetary wheel method, and analyze the principle of tooling structure and process with computer graphics parameters design. The results that, as long as the appropriate parameters, using the above method not only can punch the square hole, can also be processed triangle, the five angle and hexagonal regular polygon holes. The square hole processing method can provide theoretical basis and engineering reliable reference for related engineering and technical personnel.

创新用人机制 狠抓干部教育 努力建设一支高素质的干部队伍

高等学校要培养高素质人才 ,必须加强干部队伍建设 ,这是党的建设的重要理论课题和实践内容。文章从三个方面介绍了华北工学院加强干部队伍建设的一些做法 :1.拓宽民主渠道 ,创新用人机制 ,严把干部“入口关”;2 .加强载体建设 ,狠抓教育培训 ,严把干部的“思想关”;3.不断研究新情况 ,吸收新经验 ,逐步形成一套干部工作的良性机制。