共查询到19条相似文献,搜索用时 109 毫秒
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为满足LF2铝合金垫环零件对变形量、表面粗糙度和切削功率的加工要求,提出双刀车削加工工艺,经分析得出车削参数是影响加工结果的关键因素。利用中心复合法设计试验方案,通过对试验结果的趋势分析和机理分析探究加工参数对评价指标的影响规律,基于乘法归一法将层次分析法和熵权法融合为主客观赋权法对三项评价指标分配权重,利用TOPSIS法优选双刀车削参数,并将优选结果进行实际加工验证,结果表明:基于主客观赋权法-TOPSIS优选的双刀车削加工参数满足LF2铝合金垫环零件三项评价指标的综合要求,具有良好的实际工程应用价值。 相似文献
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阐述了如何结合专家系统和人工神经网络技术来开发外圆车削加工的计算机辅助工艺系统。根据设计要求,专家系统的推理机制能从相应的知识库中寻找出适合的工艺流程和参数;另一方面,同样的人工神经网络结构能根据不同的训练数据提供不同的答案,因此弥补了专家系统灵活性不足的缺点。所以,一个集成了两者的复合系统必将提供更好的实用性。 相似文献
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针对车削切削参数的优化提出了一种单目标非支配排序自适应遗传算法(SONSAGA),算法保留了NSGA-II的精英保留策略、快速非支配排序优点,克服了NSGA-II中取值边界附近多个无法消除的支配点现象。车削实例计算结果获得优于已发表文献的优选值,证明单目标非支配排序的自适应遗传算法用于车削用量参数的优化是有效的。SONSAGA算法设置参数少,包括相对变化量、种群规模、最大遗传代数,能自动调节最大遗传代数以及自适应地得到满足给定相对变化量的优选值,为车削用量优化提出了新思路。 相似文献
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《机械制造与自动化》2016,(3):62-65
影响PCD刀具车削铝合金表面粗糙度的主要因素是切削速度、进给量、背吃刀量。以黄金分割法设计了实验方案,优选了三因素的水平范围,用等距法设置了水平值。实验结果表明,对工件车削表面粗糙度影响最大的因素是进给量,次之是切削深度,切削速度的影响最小。通过正交实验法验证了上述实验数据并筛选了含优区间,获得了本工艺的最佳切削参数。 相似文献
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介绍一种通过合理选择切削参数控制振动对超精密加工表面质量影响的新方法。通过因子实验,设计建立的振幅预测模型,研究超精密车削铝合金过程中主要切削参数,如切削速度、进给量和切削深度的变化对振动的影响。并利用优化设计中的约束变尺度法编制程度,实现了对切割参数的优选。 相似文献
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对α+β钛合金TC11进行车削工艺研究,采用无涂层、PVD Ti Al N涂层、金刚石涂层三种刀片在干式加工和MQL冷却状态下进行车削试验。研究不同刀具、冷却方式和加工参数对车削TC11钛合金切削力、切削温度、加工表面质量、刀具寿命和刀具磨损方式等影响规律。通过相关试验数据得出相关切削参数,为优选加工刀具提供参考。 相似文献
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采用试验设计法对5083铝合金超精密车削的加工参数进行研究和优化,通过部分析因设计和响应曲面方法确认显著影响铝合金超精密车削的加工参数,应用JMP数据统计分析软件对试验结果进行回归分析。试验结果表明,在使用天然金刚石刀具的条件下,影响5083铝合金超精密车削的主要加工参数是进给量和切削速度。当进给量为0.06 mm/r、切削速度为1 010 m/min时,超精密车削加工得到的铝合金表面粗糙度Ra仅为0.03μm,刀具的有效加工距离为34 km,使用寿命明显提升。 相似文献
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Dr C. K. Kwong G. F. Smith 《The International Journal of Advanced Manufacturing Technology》1998,14(5):350-357
Process design of injection moulding involves the selection of the injection moulding machine, mould design, production scheduling, cost estimation, and determination of injection moulding parameters. An expert system approach has been used to derive the process solution for injection moulding over the past few years. However, this approach is found to be incapable of determining the injection moulding parameters owing to the fragile nature of the knowledge for setting the moulding parameters. In addition, the existing expert systems for process design lack proper architecture for organising heterogeneous knowledge sources. In this paper, the combination of a blackboard-based expert system and a case-based reasoning approach is introduced to eliminate the deficiency of the existing expert-system approach to process design, from which a computational system for the process design of injection moulding, named CSPD, has been developed. CSPD first derives the process solution including the selection of the injection moulding machine and the mould base, tooling cost, processing cost estimation, and production scheduling based on the blackboard-based expert-system approach. It is then followed by the determination of the injection moulding parameters based on the case-based reasoning approach and the previously derived partial solution. 相似文献
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机加工用量选择专家系统 总被引:4,自引:0,他引:4
将机加工用量参数数据库与专家经验知识结合起来,以专家系统的形式进行机加工用量的优化选择,进而达到提高生产效率和降低加工成本的目的。系统包括专家系统模块,机加工工艺模块及其他功能模块(包括设备维护、车间维护、数据管理、系统管理和帮助模块等)。 相似文献
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数控机床故障诊断专家系统的设计 总被引:3,自引:0,他引:3
建立了一个数控机床故障诊断专家系统。详细地介绍了TCG16CNC机床故障诊断专家系统的结构与功能,以及采用基于知识的诊断推理,诊断目标的建立、诊断知识库的组成两个关键性技术问题的解决方法。最后介绍了TCG16CNC机床故障诊断专家系统在工厂的应用。 相似文献
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采用一阶谓词、产生式和过程组合的混合知识表示方法,以VISUAL BASIC6.0为编程语言,AC-CESS为后台数据库,开发了车削可转位刀片选用专家系统。该系统为车削可转位刀片的选用提供了一种新的手段。 相似文献
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1IntroductionInrecentyears,themainfunctionsofCADarenu-mericalcalculations,dataretrievalandcomputergraphics.Thereis,however,somekindofworkstilltobedonebydesignerhimself,suchasorganizingdesigninformation,in-troducingcreativity,intelligenceandexperience,andc… 相似文献
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A computational system for process design of injection moulding: Combining blackboard-based expert system and case-based reasoning approach 总被引:3,自引:0,他引:3
Dr C. K. Kwong G. F. Smith 《The International Journal of Advanced Manufacturing Technology》1998,14(4):239-246
The process design of injection moulding involves the selection of the injection moulding machine, mould design, production scheduling, cost estimation, and determination of injection moulding parameters. Expert system approaches have been attempted to derive the process solution for injection moulding in the past few years. However, this approach has been found to be incapable of determining the injection moulding parameters owing to the difficulty in setting the moulding parameters. In addition, the existing expert systems for process design lack the proper architecture for organising a heterogeneous knowledge source. In this paper, the combination of a blackboard-based expert system and case-based reasoning approach is introduced to make up the deficiencies of the existing expert-system approach to the process design, from which a computational system for process design of injection moulding, named CSPD, was developed and described. CSPD first derives the process solution including the selection of injection moulding machine and mould base, tooling cost, and processing cost estimation, and production scheduling based on the blackboard-based expert-system approach. It is then followed by the determination of the injection moulding parameters based on the case-based reasoning approach and the previously derived partial solution. 相似文献