共查询到20条相似文献,搜索用时 15 毫秒
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在不考虑工艺因素及切削条件等的影响下,仅从滚切原理、滚刀误差及滚齿机不准确性等方面进行分析计算,并论述由此产生的各种误差。 相似文献
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齿轮表面损伤是影响齿轮传动的重要因素,提高齿轮表面损伤的识别效率和准确率极为重要。基于Pytorch架构建立齿轮表面损伤的ResNet识别模型,利用数据增强的方式扩大数据集,使用迁移学习方式优化模型训练,并对比了4种ResNet结构。结果表明,将64张原始图像数据增强后得到的由640张图像组成的数据集不足以满足模型训练对大量数据的需要;使用迁移学习能够提高模型训练速度和准确率,满足齿轮表面损伤的识别要求;ResNet-101模型在本框架中是最优结构。研究对齿轮表面损伤的检测具有重要的科学意义和工程价值。 相似文献
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Recently, based on the powerful capability of feature extraction, deep learning technique has been applied to the field of process monitoring, and usually, the researches utilize all the abstract features to establish the detection model and detect or classify the fault. However, whether all the extracted features are valid and beneficial for process monitoring have never been researched and discussed. If there are some features that are adverse for process monitoring, the detection performance of the model would be reduced once they are considered in the model, and utilized the features that are advantageous for process monitoring could ameliorate the performance of detection model. Motivated by this, a feasibility analysis on each feature captured by deep belief network for process monitoring is executed and the conception of active features (AFs) which have active expression for the occurrence of the fault is proposed. Based on AFs, utilized Euclidean metric to calculate the dissimilarity between the test sample and the training sample, and moving average technique is employed to reduce the effect of the burst noise in measurement variables on the result. Finally, the comparison of fault detection rate with other advanced methods on a numerical process and TE process demonstrate the feasibility and superiority of the proposed method, AF-DBN in this study. 相似文献
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利用Visual Basic开发了计算和选配滚齿机挂轮的软件,该软件计算精度高、界面美观友好、操作快捷方便,提高了生产效率,在生产实际中有着广泛的应用前景。 相似文献
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根据PCB制造需求,该文设计了以OPC UA接口为核心的数控铣床eMCS系统,详细描述了数控铣床文件内容分析、OPC UA服务和客户端配置、平台配置及系统数据应用。实际应用表明,通过OPC UA接口实现的数控铣床 eMCS系统,取得了较大的经济效益,提高了生产效率。 相似文献
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R. Galczyński 《Precision Engineering》1984,6(1):25-30
Increasing demand for precision and economy in gear manufacture necessitates control of the essential parameters in the hobbing process. Recognizing this necessity, research was undertaken to develop a hob wear detector. Using an empirical procedure, the acoustic signal emitted in hobbing was assessed with respect to its capacity to provide information about the extent of hobbing cutter wear. It was shown that signals from measurement of acoustic pressure in full bandwidths are unsuitable for the purpose. Frequency analysis of the acoustic signal enabled a third-octave frequency range with a centre frequency of 160 Hz to be singled out, wherein the acoustic signal level showed a close correlation with hob wear. The suitability of the signal is independent of most of the basic machine and process parameters and, for the purposes of hob wear detection, is reduced with higher values of module pitch of the hobbed gear 相似文献
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基于神经网络多传感器融合的刀具摩损定量监测的研究 总被引:5,自引:0,他引:5
研究了前馈神经网络(FNN)的自构造型学习算法,提出了基于神经网络多传感器融合的一般结构及刀具磨损监测方法,讨论了多传感器的选择、多传感器信号的采集与预处理以及多传感器信号的特征选择与正规化处理,并就铣削过程的刀具磨损监测进行了实验研究,结果表明,所提出的方法可获得93%的识别率。 相似文献
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随着机床及刀具等技术的发展,以及对效率的追求,在对大模数淬硬齿轮加工过程中以刮代磨所产生的经济效益愈加显著。通过试验总结出刮削的辅助条件、参数设置、精度范围等。随着淬硬齿面刮削技术的日益成熟,该工艺方法必将得到更大的推广。 相似文献
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针对当前智能楼宇控制系统中各子系统难以实现开放、无缝连接,本文介绍了基于OPC UA技术的智能楼宇控制系统,该系统集成了OPC UA服务适配器,可方便的实现设备更新和系统扩展,提高了设备之间的互操作性和运行效率,同时也是未来楼宇控制系统的发展方向。 相似文献
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数控滚切修形齿轮时确定刀具坐标的方法 总被引:4,自引:0,他引:4
根据在数控滚齿机上加工鼓掌形和小锥修形齿轮时,刀具和工件之间相对运动及相互位置坐标的分析,提出了一种确定刀具在垂直平面内截面中心位置坐标的计算方法,且推导出了有关的计算公式,并在齿轮加工机床CNC系统中应用。 相似文献
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通过分析直齿圆锥齿轮的加工特点,结合普通滚齿机的加工方法,利用计算机控制的优势对普通滚齿机进行改装,实现将圆锥齿轮的断续加工变为连续加工的目的。 相似文献