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杨洪春 《现代制造技术与装备》2011,(2):13-14
在分析曲轴加工工艺特点的基础上,提出以加工工序作为特征,以VB、ACCESS、AutoCAD作为工具进行曲轴的CAD/CAPP系统的研究和实用系统开发,实现曲轴零件图形的快速绘制和加工工序的自动生成及工艺信息的管理,提高工作效率。 相似文献
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在分析曲轴加工工艺特点的基础上,提出以加工工序作为特征,以VB、ACCESS、AutoCAD作为工具进行曲轴的CAD/CAPP系统的研究和实用系统开发,实现曲轴零件图形的快速绘制和加工工序的自动生成及工艺信息的管理,提高工作效率. 相似文献
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曲轴是发动机的主要零件,其加工质量和加工效率直接影响发动机的工作性能和制造。曲轴粗加工采用CNC外铣加工工艺,使工件的加工精度、适应多品种生产的柔性和质量的稳定性都有了明显的改善。我厂引进了两台数控曲轴外铣铣床,特别适合于那些对平衡块侧面需要加工、轴颈没有沈割槽的曲轴。其较之车削、内铣等工艺,具有更高的生产效率。以济柴190型柴油机曲轴加工为实例,简要讲述了用数控曲轴铣床进行曲轴粗加工、半精加工的铣切工艺过程步骤和优点。 相似文献
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曲轴是一种典型的轴类零件,一般由曲轴的专业制造厂或专用生产线,按照严格的工艺文件经过三、四十道工序加工完成。用手工设计工艺文件劳动强度大、设计周期长、文件质量不容易保证。采用计算机辅助工艺设计很好地克服了这些缺陷。曲轴根据其曲拐个数、主曲轴径、轴径长度的不同,其加工工艺规程主要是工序尺寸和公差的变化,其内在的联系较强,为实现CAPP提供了较好的工艺条件。另外,随着All-toCAD12.0以上版本中的ADS和AutoCADSQL及其扩充ASE等开发接口的出现,为实现CAPP提供了技术条件。一、系统的构成及原理1.总体结构… 相似文献
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In a recent paper, the Ritz method with simple algebraic polynomials as trial functions was used to obtain an eigenvalue equation for the free vibration of a class of homogeneous solids with cavities. The method presented is here extended to the study of a class of non-homogeneous solids, in which each solid is composed of a number of isotropic layers with different material properties. The Cartesian coordinate system is used to describe the geometry of the solid which is modelled by means of a segment bounded by the yz, zx and xy orthogonal coordinate planes and by two curved surfaces which are defined by fairly general polynomial expressions in the coordinates x, y and z. The surface representing the interface between two material layers in the solid is also described by a polynomial expression in the coordinates x, y and z. In order to demonstrate the accuracy of the approach, natural frequencies are given for both a two- and three-layered spherical shell and for a homogeneous hollow cylinder, as computed using the present approach, and are compared with those obtained using an exact solution. Results are then given for a number of two- and three-layered cylinders and, to demonstrate the versatility of the approach, natural frequencies are given for a five-layered cantilevered beam with a central circular hole as well as for a number of composite solids of more general shape. 相似文献
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通过分析膨胀套在实际使用产生滑移受阻现象、卡死现象原因的实质,并在分析产生问题原因的基础上提出了改进措施即:增加导向机构。 相似文献
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设计了磨粉机快辊轴承座的加工工艺和具体的工装夹具.利用卧式加工中心加工磨粉机快辊轴承座,辅以能够高效快速夹紧的夹具,既可以保证加工精度,又能够提高加工效率. 相似文献
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一种涡旋压缩机径向随变机构的设计 总被引:1,自引:0,他引:1
详细介绍了运用随变原理设计的一种新型径向密封机构的结构特点,工作原理及主要参数的确定方法,该机构可补偿由于涡旋体加工精度不高而造成的功率损失,适用于涡旋压缩机的批量生产。 相似文献
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V. P. Dragunov E. G. Kostsov 《Optoelectronics, Instrumentation and Data Processing》2009,45(3):234-242
Specific features of operation of one- and two-capacitor microelectromechanical converters (MEMC) of energy of mechanical microscopic vibrations into electric energy with a modulated electrode-gap magnitude and with allowance for the mutual influence of electrical and elastic forces are analyzed, and the characteristics of these two devices are compared. The main factors restricting the increase in MEMC power are demonstrated to be the effects of “collapsing” and the condition of conservation of positive rigidity of the system. Expressions for estimating the limiting MEMC parameters are derived. The possibility of electrical energy generation in the presence of “real“ sources of wide-spectrum microscopic vibrations is considered. 相似文献
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针对目前市场对工业设计人才的需求,本文论述了我校在工业设计教育方面的改革措施,着重介绍了我校工业设计教育在软件和硬件方面所进行的一系列的改革。 相似文献
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本文以某些积算和双笔记录仪产品为例说明由于仪表功能设计的不合理或选型不当,影响了仪表的正常使用,制造厂和用户应关注这类问题。 相似文献