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在汽车白车身焊装线规划过程中,焊钳选择、设计及焊钳的仿真验证是重点工作之一,结合夹具设计进行模拟验证,将焊钳问题在数模设计阶段解决,不仅节约整改成本,更缩短了整改周期。 相似文献
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基于当前的以检具和人工检测为主的零部件尺寸检测模式,通过优化测点设计、检具设计以及尺寸测量记录表设计,分析预测现场造车匹配的问题,减少现场造车验证数量及次数,缩短车身匹配问题整改周期,并为零部件最终认可提供准确可追溯的并带有车身坐标方向的测量数据支持。 相似文献
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《机械工程与自动化》2016,(2)
应用ESP技术与电子专业知识相结合,通过对电路图进行仿真,对车身稳定系统进行了模拟,从理论上达到了提高车身稳定性能的目的。应用相关元器件,在飞思卡尔车上模拟了使用ESP系统前后车身的稳定性能。并且将SCA60传感器的输出信号通过数模转换模块转换成数字信号,通过LED灯直观显示出车身的稳定性。 相似文献
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基本体不同、截平面与基本体的相对位置不同,导致截交线的多样性,使截交线的作法成为《机械制图》的一个难点。详细介绍了截交线上点的选取方法以及这些点的第二面投影和第三面投影的求作方法,并运用此方法对平面立体、曲面立体和组合体的截交线作法进行了验证。实践表明此方法提供了一种清晰的思路,使初学者非常容易掌握各种类型截交线的作法,对教师的课堂教学也有一定的参考作用。 相似文献
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In this paper, the concept of isotropic compliance is extended to the field of compliant mechanisms. Starting from the design of a rigid-body mechanism, a planar compliant system is determined by applying the rigid-body replacement method. The static behaviour of the isotropic compliant mechanism is validated by finite element simulations and experimental tests. The extension of the proposed method to the Euclidean Space E(3) is discussed. 相似文献
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污水泵体经长时间使用后,在泵体的高压区出现大面积的掉块,使水泵的功率、扬程下降,同时增大了功率消耗;缩短设备的使用寿命、加快了设备的更换周期.介绍在钢铁企业中针对泵体锈蚀所采取的预防措施和掉块修复工艺,具有可靠、节约、简单易行和实用等特点. 相似文献
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电动低速汽车能满足人们对低速、短途运输的需求,同时具有绿色环保的特点,正越来越引起人们的关注。根据轿车车身刚度和电动低速汽车的特点,确定了电动低速汽车车身刚度参考标准,然后以某电动低速汽车为例,运用拓扑优化设计,结合实心梁—空心管梁等效材料方法,得到车身材料分布初步方案,随后根据该方案和可制造性原则,详细设计了车身结构。分析结果表明,基于刚度优化设计的电动低速汽车车身结构,其刚度和强度更优。 相似文献
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本文对车身结构复杂曲面的二维工作图,以Pro/E软件为载体,提出了CAD三维空间逆向造型的机械加工法、点线重构法和综合法等三种造型方法.这对新车身的开发具有重要意义. 相似文献
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Experimental and numerical investigations are carried out with various bluff body shapes to identify an appropriate shape which can be used for vortex flowmeter application. In both the cases vortex shedding frequency is inferred from the fluctuation of wall pressure. The numerical simulations are carried out with cylindrical and triangular bluff bodies to understand the vortex shedding phenomenon and to identify an appropriate turbulence model for this class of flows with wall pressure measurement. The simulations reveal that the k-ε RNG model predicts the Strouhal number closer to the experimental results than other models. The experimental investigations are carried out with several bluff body shapes, such as triangular, trapezoidal, conical, cylindrical and ring shapes, with water as the working medium. In this context, the effects of sampling rate, tap location and blockage effects are explored. The results suggest that the axisymmetric tapping is better than differential pressure tapping in terms of signal amplitude. The non-dimensional location of the static pressure tap is found to be 0.714 times diameter of pipe times blockage. The trapezoidal bluff body is found to be the best among all the bluff bodies investigated in terms of signal amplitude and constancy of Strouhal number. The vortex flowmeter performance is also measured under disturbed flow conditions created by using gate valve and bends. These results are significant because they provide an optimum bluff body shape and blockage, and also present the performance of vortex flow meter under disturbed flow conditions which is rather seldom reported in the literature. 相似文献