电子零件计算机辅助工时定额计算系统的研究与实现

发布时间：2019-07-02 09:44

【摘要】：工时定额是企业信息化管理的一项基础性工作,是企业进行科学化、标准化管理的必要手段,是现代企业管理制度的重要组成部分,工时定额的制定关系到生产过程中的成本核算、制造周期及制造工人的经济效益等。本文对南京某企业的电子零件工时定额现状进行了研究,发现主要存在两个问题:企业长期采用经验估工法进行工时定额,定额结果存在较大偏差;电子零件结构复杂,工时定额难度较大。对此,本文开展了计算机辅助工时定额技术的研究,设计开发了电子零件计算机辅助工时定额计算系统,提高了工时定额的准确性和效率。本文的主要工作如下:(1)将基于实例推理技术应用于电子零件完整工艺流程工时定额。建立零件工时定额信息模型,给出了零件工时实例的表达方法;研究了基于Creo的零件特征提取技术以及相似零件的检索算法,确定了实例评价方式;针对工艺流程中的数控加工工序给出了实例的重用策略;研究了实例的修改保存技术。最后以壳体零件为例验证了算法的可行性。(2)研究了印制板零件的工时定额技术,分析了其工艺和工序工时的影响因素,通过实测法,MATLAB公式拟合等方法建立了关键工序的工时定额计算模型。(3)提出了系统的需求和总体目标,建立了系统的体系结构,划分了系统功能模块和业务角色,确定了业务流程,设计了系统数据库。(4)开发了电子零件计算机辅助工时定额计算系统,划分为基于Web和基于Creo的两个子系统,分别实现辅助工时定额计算功能和零件相似检索功能。
[Abstract]:Man-hour quota is a basic work of enterprise information management, a necessary means for enterprises to carry out scientific and standardized management, and an important part of modern enterprise management system. The formulation of man-hour quota is related to cost accounting in the production process, manufacturing cycle and economic benefits of manufacturing workers. In this paper, the present situation of man-hour quota of electronic parts in a Nanjing enterprise is studied, and it is found that there are two main problems: the empirical estimation method is used to carry out the man-hour quota for a long time, and there is a big deviation in the quota result, and the structure of electronic parts is complex and the man-hour quota is difficult. In this paper, the computer aided man-hour quota technology is studied, and the computer-aided man-hour quota calculation system for electronic parts is designed and developed, which improves the accuracy and efficiency of the man-hour quota. The main work of this paper is as follows: (1) the case-based reasoning technology is applied to the man-hour quota of electronic parts complete process. The information model of part man-hour quota is established, and the expression method of part man-hour example is given; the part feature extraction technology based on Creo and the retrieval algorithm of similar parts are studied, and the evaluation method of the example is determined; the reuse strategy of the example is given for the NC machining process in the technological process; and the modification and preservation technology of the example is studied. Finally, the feasibility of the algorithm is verified by taking shell parts as an example. (2) the man-hour quota technology of printed circuit board parts is studied, the influencing factors of process and working hours are analyzed, and the calculation model of man-hour quota of key processes is established by means of measurement method and MATLAB formula fitting. (3) the requirements and overall objectives of the system are put forward, the architecture of the system is established, and the functional modules and business roles of the system are divided. The business process is determined and the system database is designed. (4) the computer aided man-hour quota calculation system for electronic parts is developed, which is divided into two subsystems based on Web and Creo, and the auxiliary man-hour quota calculation function and part similarity retrieval function are realized respectively.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TP311.52;F273

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