搜索结果: 1-15 共查到“知识库 机械制造工艺与设备其他学科”相关记录62条 . 查询时间(2.982 秒)
冷轧热镀锌线炉子段网络故障分析与解决方案
屏蔽 抗干扰能力 网络压力 拓扑结构
2014/5/23
针对涟钢冷轧热镀锌线炉子段网络经常出现网络闪断故障问题，提出一种故障解决方案。介绍冷轧热镀 锌线生产工艺和炉子段网络对工艺的重要性，重点分析炉子段网络拓扑结构和网络故障原因，从减轻网络负荷、增 强抗干扰能力等方面提出切实有效的解决方案。结果表明：经过一年多的运行测试，此段网络再未出现过网络闪断 故障，能确保炉子段设备的稳顺运行，能为全行业西门子网络所出现的问题提供指导性意见。
自动扶梯事故典型案例分析
自动扶梯 螺栓 振动 疲劳断裂
2013/6/8
根据断口特征和受力状态分析,探讨了某品牌自动扶梯驱动主机与座板联接螺栓的疲劳破坏原因. 该螺栓疲劳断裂很可能缘于驱动主机系统的异常振动以及螺栓长度不足导致螺栓与座板啮合段螺纹根部的应力高度集中. 电机系统动力学特性分析进一步表明:系统之所以发生异常振动,缘于制造商对该系统联接方式进行的不当设计变更.
人工神经网络在Al2O3陶瓷激光铣削中的应用研究
激光铣削 人工神经网络 陶瓷 工艺参数
2013/3/11
为了有效地控制Al2O3陶瓷激光铣削层质量，以人工神经网络（ANN）技术为基础，以MATLAB软件作为开发平台，建立了Al2O3陶瓷激光铣削层质量与铣削参数之间的关系模型。并以激光功率、扫描速度和离焦量作为输入参数，激光铣削层深度和宽度作为输出参数，对激光铣削层质量进行了预测。结果表明，该模型的平均误差小，拟合精度高。并在训练样本之外，选取了5组工艺参数来检验网络模型的可靠性，检验输出值和实验样本...
单晶硅电火花铣削电极表面覆盖效应研究
单晶硅 电火花铣削 电极损耗 覆盖效应
2011/2/18
对单晶硅电火花铣削过程中电极表面出现的覆盖层进行了分析,分析结果表明,该覆盖层的主要成分是SiO2。实验证明,SiO2是加工过程中电化学反应的产物。研究了电参数对SiO2覆盖层厚度的影响规律。研究结果表明,可以通过控制SiO2覆盖层的厚度来保护电极和补偿电极损耗,实现低损耗甚至无损耗的单晶硅电火花铣削加工。
Analytical solution for solute transport along and against time dependent source concentration in homogeneous finite aquifers
Aquifer Solute transport Contaminant concentration
2010/12/30
A solute transport equation is analytically solved to predict the contaminant concentration distribution along and against transient groundwater flow in finite aquifer. The horizontal dispersion along...
Coupled method of homotopy perturbation method and variational approach for solution to nonlinear cubic-quintic Duffing oscillator
Nonlinear Oscillators Variational formulation
2010/11/25
This paper presents a new approach for solving approximate analytical higher order solutions for strong nonlinear Duffing oscillators with cubic-quintic nonlinear restoring force. The system is conser...
A new technique of laminated composites homogenization
Laminated composites, homogenization behaviour law
2010/11/25
The homogenization technique of the laminated composite is presented in this paper. The behaviour law of each layer expressed in the laminated coordination axis is used. The homogenization technique i...
无侧隙双滚子包络环面蜗杆真实啮合齿面的理论研究
真实齿面 无侧隙 双滚子包络环面蜗杆 啮合原理
2010/4/30
为获得无侧隙双滚子包络环面蜗杆三维真实啮合齿面,基于空间啮合原理建立了无侧隙双滚子包络环面蜗杆传动的数学模型,推导了蜗杆传动的齿面接触螺旋线方程. 该方程与Pro/ E 软件结合,获得无侧隙双滚子包络环面蜗杆的真实啮合齿面. 在此基础上将利用Matlab 软件计算得到的蜗杆接触线与Pro/ E 软件拟合得到的蜗杆齿面对比分析. 结果表明:蜗杆齿面拟合精度由蜗杆齿面接触螺旋线条数决定,当螺旋线为9 ...
The Use of Rational Design in the Development of an Improved Plug Tool for the Rotary Tube Widening Process
Tool Design Tube Widening Process CRHS Concept
2009/12/30
To improve the performance of any metal forming process, a minimization in the process load parameters is needed. The used die geometry significantly affects the process performance. Several die desig...
基于VirtualHub多企业协作生产计划系统仿真研究
多企业协作 生产计划 VirtualHub 伙伴选择 仿真
2009/12/27
提出一种基于VirtualHub的多企业协作生产计划系统，并设计开发了支持多企业生产信息共享的VirtualHub，采用消息机制快速处理协作企业间的信息传递，屏蔽分布式企业异构系统之间信息共享的复杂性.基于成组技术的先粗后精订单分解方法，提高外部订单分解的效率.以某订单为例，着重就订单分解、企业生产进度更新和子任务实时监控等进行仿真，论证了所提系统和方法的有效性.
Purpose: In this paper, the effects of various process parameters of WEDM like pulse on time (TON), pulse off
time (TOFF), gap voltage (SV), peak current (IP), wire feed (WF) and wire tension (WT) ha...
Integrated product and process system with continuous improvement in the auto parts industry
Quality System CIM DFMA
2009/12/14
Purpose: Quality systems (QS) update must be based on the enterprise organization to assure customer satisfaction, as Deming, Juran and Feigenbaum did in their time, to seek improvement processes to r...
Investigations on the suitability of some ferrous alloys for semi-solid processing
Casting Thixoability Thixoforming
2009/12/14
Purpose: the work analyses the thixoability of SAE 1070, SAE 1548 and SAE 4340 steels; the possibility of producing thixotropic semi-solid by partial melting of these alloys and the phase transformati...
Achievements of sustainable manufacturing by machining
Sustainable development Sustainable manufacturing Cryogenic machining
2009/12/14
Purpose: Manufacturing industry is under increasing pressure of global competition, stricter environmental legislation and supply-chain demand for improved sustainability performance. The latter can b...