共查询到15条相似文献,搜索用时 62 毫秒
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基于制造成本与质量损失的并行公差设计 总被引:1,自引:1,他引:1
研究产品质量损失与产品尺寸公差的关系 ,提出具有多个相关装配尺寸产品的质量损失 ,并把它表示成工序公差的函数。利用成本 -公差函数和产品的质量损失函数 ,给出基于产品最低制造成本和多个相关装配尺寸产品质量损失的并行公差设计优化模型 ,实现公差的并行设计 ,最后通过工程实例验证所提出的方法 相似文献
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运用并行公差优化设计方法对精密卧式加工中心线性轴进行公差分配.在保证机床现有精度条件下,综合分析机床各线性轴制造误差的敏感度和加工成本,优化了给定结构机床线性轴导轨选型和导轨基面工序公差的精度设计,节约了机床制造成本. 相似文献
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Concurrent process tolerance design based on minimum product manufacturing cost and quality loss 总被引:3,自引:1,他引:3
M.F. Huang Y.R. Zhong Z.G. Xu 《The International Journal of Advanced Manufacturing Technology》2005,25(7-8):714-722
In a concurrent design environment, a robust optimum method is presented to directly determine the process tolerances from multiple correlated critical tolerances in an assembly. With given distributions of multiple critical assembly dimensions, the Taguchi quadric quality loss function is first derived. The quality loss is then expressed as the function of pertinent process tolerances. A nonlinear optimal model is established to minimize the summation of manufacturing costs and product quality loss. An example illustrates the proposed model and the solution method . 相似文献
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Concurrent tolerancing for design and manufacturing based on the present worth of quality loss 总被引:1,自引:1,他引:0
Heping Peng 《The International Journal of Advanced Manufacturing Technology》2012,59(9-12):929-937
The quality loss function developed by Taguchi provides a monetary measure for the deviation of the product quality characteristic from the target value. Product use causes degradation on its quality characteristic, and since such a deviation can be changing over time, so can the quality loss. However, most studies on concurrent tolerancing theory do not consider the quality loss caused by the degradation. In this paper, the present worth of expected quality loss expressed as the function of the pertinent process tolerances in a concurrent tolerancing environment is derived to capture the quality loss due to product degradation over time as a continuous cash flow function under continuous compounding. A new tolerance optimization model, which is to minimize the summation of manufacturing cost and the present worth of expected quality loss, is established to realize the concurrent tolerance allocation for products with multiple quality characteristics. An example of the bevel gear assembly involving concurrent allocation of design and process tolerances is given, demonstrating that the proposed model is feasible in practice. 相似文献
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Angus Jeang Chien-Ping Chung 《The International Journal of Advanced Manufacturing Technology》2009,43(7-8):710-719
Conventional process capability indices, such as C p, C pk, and C pm, have been used widely and successfully in most of today’s manufacturing sectors. These process capability indices, however, can only measure the process consequence resulting from various combinations of process mean and process variance on site by measuring the output without concern as to cost. Hence, the focus of this research was to develop a new process capability index, C pmc, which not only considered the impact from process mean and process variance, as is conventionally done, but also considered the relevant quality and production costs incurred in a product’s life cycle. With these added aspects, the new process capability index, C pmc, is considered as a response value which needs to be optimized to ensure that both an economical and a quality design can be achieved. The design constraints are the restrictions resulting from the process capability limits, the feasible process range, and the functionality requirements. An example of product assembly is introduced to demonstrate the applicability of the presented approach so that the optimal mean and tolerance values can be determined and so that the C pmc value is maximized. By using the presented C pmc, a high-quality but low-cost process design can be achieved during the early stages of product design and process planning. 相似文献
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《计算机集成制造系统》2015,(6)
为定量评估加工过程中各种随机因素造成的两类特性偏差对加工过程可靠性的影响,从完成生产任务的角度出发,将生产任务的时间(T)、质量(Q)、成本(C)均看作产品特性,研究了加工过程可靠度的概念,分析了工艺加工过程中的质量特性的关联机理,基于质量损失函数构建了加工过程的产品特性与任务载荷要求PL、过程特性与生产能力PC的关系模型。根据工艺设计及设备的固有生产能力,参考广义应力—强度干涉理论,提出了加工过程的任务载荷—生产能力(PL-PC)模型,建立了加工过程可靠性状态函数,并给出了评估框架。以某轴承的镀膜过程为例,验证和分析了模型和评估方法的可行性和有效性。 相似文献