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Study on the Influence Law of Sun Wheel Stiffness on Floating Quantity of Planetary Mechanism 太阳轮刚度对行星机构浮量的影响规律研究
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.111005
娟 王
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引用次数: 0
Design and Simulation of Multifunctional Intelligent Seat 多功能智能座椅的设计与仿真
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.115055
子杰 陈
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引用次数: 0
Research on Aluminized Boundary of Car Lamp Parts 汽车车灯零件镀铝边界的研究
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.114039
佳焱 马
Based on the aluminizing process of automobile lamps, this paper studies the masking method of tooling in the non-aluminized area for the lamp parts with complex aluminized boundary structure. First, analyze the aluminized parts in the car lights, and determine four common aluminized boundary structure models; secondly, use a microscope to observe the aluminized transition area, and analyze the aluminized parts under different masking tooling parameters (H, J, Z) through a value and b value. And then, according to the analysis results, the design method of aluminized tooling with different aluminized boundary structures is given. Finally, the effectiveness of this conclusion is verified by practical cases.
以汽车车灯的渗铝工艺为基础,研究了具有复杂渗铝边界结构的车灯零件在非渗铝区域的模具掩模方法。首先,对汽车车灯中的镀铝件进行了分析,确定了四种常见的镀铝边界结构模型;其次,用显微镜观察渗铝过渡区,通过a值和b值对不同掩模工装参数(H、J、Z)下的渗铝件进行分析。然后根据分析结果,给出了不同渗铝边界结构的渗铝工装的设计方法。最后,通过实际案例验证了这一结论的有效性。
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引用次数: 0
Application Research of MES System Based on Cast Pipe Industry 基于铸管行业的MES系统应用研究
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.115053
雪川 林
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引用次数: 0
Parameter Optimization and Experimental Verification of Hydrodynamic Pressure Mechanical Seal in Aero Engine 航空发动机动液压力机械密封参数优化及实验验证
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.113030
伟 熊
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引用次数: 0
Research of Engine Performance Monitoring Based on Support Vector Data Description 基于支持向量数据描述的发动机性能监测研究
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.113034
向财 于
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引用次数: 0
Image Detection of Metal Surface Defects Based on Improved YOLOX-S Network 基于改进YOLOX-S网络的金属表面缺陷图像检测
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.114044
Chao Wu, Xin Ye, Jinmao Jiang, Shanglong Xu
In order to realize the image detection and identification of surface defects in the manufacturing and processing of metal parts, improve the image detection accuracy of unqualified products in the process of metal parts processing assembly line, improve the automation level of equipment in the process of metal defect detection, and solve the problems of easy fatigue, low detection effi-ciency, low detection accuracy, strong subjectivity and inability to adapt to the detection of large quantities of high-quality parts in manual detection. A convolution neural network model based on improved YOLOX-S is proposed for metal surface defect image detection. The model changed the structure of the unit module and introduced the attention mechanism module based on the original YOLOX-S model, which optimized the model parameters and improved bounding box position regression loss function and confidence loss function, and then the image detection model of common defects on the metal surface was constructed and realized. The results showed that the loss of improved YOLOX-S model could converge faster, the model with bounding box position regression loss function and attention mechanism added, its mAP increased from 94.23% to 96.14%, and the accuracy improvement effect is the best, while only a small amount of reasoning time is increased. Compared with the YOLOX-S model and the model with different improved methods, it is shown that the improved model based on bounding box position regression loss function and attention mechanism has the best comprehensive recognition effect, which can meet the require-ments of metal surface defect image detection and reduce the outflow of defective products in the production process of metal parts.
为了实现金属零件制造加工过程中表面缺陷的图像检测与识别,提高金属零件加工装配线过程中不合格产品的图像检测精度,提高设备在金属缺陷检测过程中的自动化水平,解决易疲劳、检测效率低、检测精度低等问题,主观性强,无法适应人工检测中大批量高质量零件的检测。提出了一种基于改进的YOLOX-S卷积神经网络模型用于金属表面缺陷图像检测。该模型改变了单元模块的结构,在原有YOLOX-S模型的基础上引入了注意机制模块,对模型参数进行了优化,改进了边界盒位置回归损失函数和置信度损失函数,构建并实现了金属表面常见缺陷的图像检测模型。结果表明,改进后的YOLOX-S模型的损失收敛速度更快,增加了边界盒位置回归损失函数和注意机制的模型,其mAP从94.23%提高到96.14%,准确率提升效果最好,而只增加了少量的推理时间。通过与YOLOX-S模型和不同改进方法的模型进行比较,表明基于边界盒位置回归损失函数和注意机制的改进模型具有最好的综合识别效果,能够满足金属表面缺陷图像检测的要求,减少金属零件生产过程中不良品的流出。
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引用次数: 0
Design of a Self-Closing Push-Out Device for the Side Cover of a Prefabricated Box-Filled Cigarette Pack 预制纸盒卷烟侧盖自闭推出装置的设计
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.113036
刚 王
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引用次数: 0
Flexible Analysis of Ball Screw Motion Accuracy Reliability 滚珠丝杠运动精度可靠性柔性分析
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.112017
亚西 刘
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引用次数: 0
Optimization Research of Air Gap Flux and Table Magnetic Flux Leakage in Electrodynamic Vibration Generator 电动振动发生器气隙磁通与工作台漏磁的优化研究
Pub Date : 2022-01-01 DOI: 10.12677/met.2022.114046
杨 李
Air gap magnetic flux and magnetic flux leakage on the table are two important performance indi-* cators of the electrodynamic vibration generator. It’s required that the magnetic flux leakage should be as small as possible and air gap magnetic flux should be as large as possible. At present, the general method of increasing the air gap magnetic flux is to increase the ampere-turns of the excitation coil, but the magnetic flux leakage will increase synchronously. The magnetic flux leakage can be reduced by adding a degaussing coil, but it is inconvenient in the design, manufacture and use, and even generates larger stray magnetic fields in some locations. According to the use experience, appropriately reducing the ampere-turns ratio of upper and lower excitation coil can effectively reduce the magnetic flux leakage. Aiming at this phenomenon, it’s simulated that the influence of different upper and lower excitation ampere-turns ratio on air gap flux and magnetic flux leakage when the when the number of ampere-turns remains unchanged. In this paper, con-sidering the air gap magnetic field and the surface magnetic flux leakage, a new method of balanc-ing the air gap flux and the surface leakage is established.
气隙磁通和工作台漏磁是电动振动发生器的两个重要性能指标。要求漏磁尽可能小,气隙磁通尽可能大。目前增加气隙磁通的一般方法是增加励磁线圈的安匝数,但漏磁会同步增加。增加消磁线圈可以减少漏磁,但在设计、制造和使用上都不方便,甚至在某些位置产生较大的杂散磁场。根据使用经验,适当减小上下励磁线圈的安匝比,可有效减少漏磁。针对这一现象,模拟了在安培匝数不变的情况下,不同上下励磁安匝比对气隙磁通和漏磁的影响。本文从气隙磁场和表面漏磁的角度出发,建立了一种平衡气隙磁场和表面漏磁的新方法。
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引用次数: 0
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Journal of Mechanical Engineering and Technology
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