MODELING THE EFFECTS OF COMPLEXITY ON MANUFACTURING COSTS AND TIME- TO-MARKET OF PLASTIC INJECTION MOLDED PRODUCTS
MODELING THE EFFECTS OF COMPLEXITY ON MANUFACTURING COSTS AND TIME- TO-MARKET OF PLASTIC INJECTION MOLDED PRODUCTS
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模拟复杂性对塑料注射成型产品的制造成本和上市时间的影响
DOI：
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发表时间：
1999
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影响因子：
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通讯作者：
D. Kazmer
中科院分区：
文献类型：
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作者：
Adekunle A. Fagade;D. Kazmer
复杂性对离散机械系统的制造成本和上市时间的影响是难以预测的。在本文中，注射成型过程被用来表征零件和系统复杂性对生命周期成本和上市时间的影响。预测零件复杂性对模具加工成本和交货时间的影响的模型是从经验数据中开发出来的，并在CAD建模器中实现。一个由六部分组成的内部底盘被用来证明在一个时间敏感的市场环境中，零件整合对上市时间和生命周期利润的影响。Ing在工业中用于弥合设计和制造之间的差距。这些方法的应用使设计人员通过一系列步骤，旨在确定设计产品中可以消除或与其他部分结合的部分。这些程序在产品设计的早期阶段进行，此时设计变更的成本最低。最终产品设计中剩下的零件越来越少，越来越复杂。只要塑料性能符合设计规范，这些复杂的部件通常都是塑料注塑成型的。在产品成本和可靠性方面的显著节约已经在许多行业报告了这些准则的应用。本文使用一个测试部分来量化部分合并对上市时间和生命周期利润的影响。本研究的动机是需要建立定量框架，以指导设计师在不同的内部产品需求和外部市场动态下定义产品整合的经济水平。在日常使用“复杂性”一词时，如果a比B更难设计和制造，则a可能被认为比B更复杂。然而，这种主观的复杂性度量不足以用于工程分析。因此，我们最初的任务是寻找或定义可在产品生命周期的早期阶段通过计算机辅助设计（CAD）模型评估的复杂性的定量度量。对其他研究人员如何测量注塑件的复杂性进行了回顾。研究发现，这些复杂性度量要么需要用户输入定性参数值，如低或高的削弱复杂性，要么可能不会在所有情况下产生独特的结果（Boothroyd， Dewhurst等人1994；Dixon和Poli 1995）。
The effects of complexity on the manufacturing cost and time-to-market of discrete mechanical sys- tems are difficult to predict. In this paper, the injection molding process is used to characterize the effects of parts and system complexity on life cycle costs and time-to-market. Models for predicting the effects of part complexity on mold tooling cost and lead-time are developed from empirical data and implemented in a CAD modeler. A six-part internal chassis is used to demonstrate the effects of parts consolidation on time- to-market and life cycle profit in a time-sensitive market environment. ing used in the industry to bridge the gap between design and manufacturing. The application of these methodologies take designers through series of steps aimed at identifying parts of a designed product that can either be eliminated or combined with other parts. These procedures are carried out at the early stages of product design, when design changes incur the least cost. The remaining parts in the final product design are fewer and more complex. These complex parts are most often plastic injection molded whenever plastic properties meet the design specifications. Significant savings in product cost and reliability have been re- ported in many industries from the application of these guidelines. This paper uses a test part to quantify the effects of part consolidation on time to market and life cycle profit. This research is motivated by the need to establish quantitative frameworks that can guide designers in the definition of economic levels of product consolidation under different internal product requirement and external market dynamics. SEARCH FOR QUANTITATIVE PRODUCT COMPLEXITY METRICS In the everyday use of the word "complexity", a part A may be considered more complex than B, if A is more difficult to design and manufacture than B. This subjective measure of complexity is however not sufficient for engineering analysis. Thus, our initial task was to find or define quantitative measures of com- plexity that can be evaluated from a computer aided design (CAD) model at the early stages of the product life cycle. A review of how other researchers have measured the complexity of injection molded parts was carried out. These measures of complexity were found to either require the user's input of qualitative pa- rameters values, such as low or high undercut complexity or may not produce unique results in all cases (Boothroyd, Dewhurst et al. 1994; Dixon and Poli 1995).