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二板式锁模装置的结构改进 总被引:1,自引:0,他引:1
为了解决二板式锁模装置的调模结构存在的问题,设计了一种不需调模装置的新型二板式锁模机构,其结构简单,更换模具容易,加工方便,降低成本,提高了经济效益。 相似文献
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将遗传算法应用于注射机合模机构运动行程的最大化设计研究。优化中运动行程为目标函数,肘杆断面尺寸、肘杆起始与最终位置为设计变量,考虑了强度、稳定性、锁模力等约束条件。从研究结果来看,应用遗传算法进行运动行程的优化设计是可行且高效,可在注塑机合模机构运动行程最大化设计中推广应用。 相似文献
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许善新 《中国制造业信息化》2012,41(13):88-91
在剖析现有压铸机液压-肘杆式合模机构特点的基础上,提出了采用液压-螺旋机构实现压铸机的合模、锁模和开模。同时,还设计了双液压马达驱动系统,实现快速合模、开模以及低速大扭矩锁模。为了解决中板移动时运动过约束问题,在螺杆与中板之间设置局部移动自由度。这3个创新点简化了压铸机的整体结构,避免了以往因锁模力控制不当引起的种种失效。 相似文献
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注塑机双肘锁模机构综合优化设计 总被引:4,自引:0,他引:4
本文对塑料注射成型机双肘锁模机构开锁模时间和材料成本两目标进行综合优化来确定机构参数尺寸,并利用所得优化参数进行机构运行特性分析,从而合理优化设计活塞行 两个极限荼位置,以保证开锁模动作和的良好特性和减少冲击振动。 相似文献
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本文对塑料注射成型机双肘锁模机构开锁模时间和材料成本两目标进行综合优化来确定机构参数尺寸,并利用所得优化参数进行机构运动特性分析,从而合理优化设计活塞行程的两个极限工作位置,以保证开锁模动作的良好运动特性和减少冲击振动。 相似文献
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滑柱式钻模圆锥锁紧机构工作情况分析王莉(山西长治职工大学机械系046000)滑柱式钻模是钻床夹具中应用很广泛的一种通用可调夹具,其中手动滑柱式钻模正常工作的关键问题是夹紧、自锁均可靠,常用的自锁机构就是双圆锥自锁机构;而夹具书及手册上只介绍当锥角小... 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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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
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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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Modern methods of implementation of the rule of positive gradient of mechanical properties are considered; this rule was formulated by I.V. Kragelskii and its application serves to minimize the friction and wear of solids. The given methods include the application of coatings with the method of finishing antifricton abrasion-free treatment; application of new metal-cladding lubricating materials; and creation of a nanostructural state of the surface iron nitride layer by nitriding steel with a positive gradient of hardness normal to the surface. 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