Abstract : as the most critical factor of mpm process , the groove design of fewer stand mandrel retained mpm significantly affects the rolling course as well as product quality 文摘:少机架限动芯棒连轧管机孔型设计是连轧管工艺的核心，对轧制过程的建立和产品质量起着极其重要的作用。
Card makes design period shorter compution periods , having very high superourity compared to the classical methods . the use of optimization technique in card is an inevitable trend Card使得设计周期短、计算准确，与传统的孔型设计方法相比有着极大的优越性。将优化技术用于card是必然趋势。
Abstract : for the square n side pipe , adopting diagonal coefficient method for the pipe roller design , it has the advantage of little procedure of design and no pre - assume parameter as well as calculated easy and accurately 文摘:对正n边形焊管采用对角线系数法进行孔型设计，具有设计步骤少，没有预先假设的参数，计算简便正确等特点。
Firstly , the distortion of rolled piece and the designing method in the beforehand slit pass and slit pass has been analyzed . secondly , based on the research production of predecessor and research of the author , card system selected some corresponding experience formulas such as roll force , roll moment , roll temperature and roll consume , and established spread model in the beforehand slit pass and slit pass and the distribution model of elongation coefficient . subsequently , card system applied the dynamic programming method with minimum roll consume and optimized its pass system 本文以圆钢双线切分为基本实体模型，着重分析了预切分孔型和切分孔型在轧制过程中的变形特点及相应的孔型设计方法；基于前人的研究成果及作者的探索，选择了相应的轧制力、轧制力矩、温度及能耗模型，建立了预切分和切分的宽展及延伸系数的分配模型；应用动态规划法以能耗最小为目标函数对孔型系统进行了优化设计；利用visualbasic6 . 0和microsoftaccess数据库的连接，建立了数据查询系统，以visualbasic6 . 0和autocad之间的接口在vb环境下完成了断面孔型图的绘制。
This research job analysised the extending roll pass system the finish roll pass system and the ultimate roll groove . the mathematical models and experience formulations used for roll pass design are corrected according to the basic theory and the practical experience of the engineerings . the thread steel bar card was set up with the visual program tool - visualbasic6 . 0 , based on the method of the structural program design 本课题通过对螺纹钢延伸孔型系统、精轧孔型系统及成品孔型的构成和设计方法的分析，结合螺纹钢孔型系统的基本设计理论和工程技术人员的实际生产经验，对以往孔型设计过程中所使用的数学模型、经验公式等进行了修正，以结构化程序设计方法为基础，采用可视化编程工具visualbasic6 . 0建立了螺纹钢计算机辅助孔型设计系统。
The drawing model is developed by utilizing the interface between visual basic 6 . 0 and autocad . applied comprehensively with theories of slit rolling and idea of card , the object - oriented technology and the database function of visual basic 6 . 0 , the sophisticated function of autocad in graph manipulation , this card system is provided with higher intelligent degree and good practicability 本文综合运用了切分轧制的工艺及理论和计算机辅助孔型设计思想，结合visualbasic6 . 0的面向对象技术及数据库功能和autocad成熟的图形处理功能，使开发的card系统具有较高的智能化程度和实用性。
Designing with this card system can shorten the design cycle of the new product , lowering the consumptions of the mills and the production cost , advancing the dimensional accuracy and the mechanical character of the finished thread steel bar . it has the important significance for increasing the economic benefit of the enterprise 采用本螺纹钢card系统进行孔型设计，极大地缩短了新产品的设计周期，降低了轧机能耗和生产成本，提高了螺纹钢筋成品的尺寸精度和机械性能，对增加企业经济效益具有重要意义。
On the basis of the theory of metal distortion , this dissertation has a series of research work with bar slit rolling and combining productive practice , firstly the author has been develop the computer aided roll - pass design system for bar slit rolling in the scope of rolling . the dissertation has been designed using round steel slit rolling as entity model 本文基于金属塑性变形基本理论，以棒材切分轧制为研究对象，结合生产实践进行了深入的理论研究，在轧制领域里率先开发了棒材切分轧制的计算机辅助孔型设计( computeraidedroll - passdesign )系统。
