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基于无杆活塞缸的铰杆-杠杆增力双向夹紧液压夹具 总被引:6,自引:2,他引:4
介绍了两种由无杆活塞液压缸与双边铰杆-杠杆增力机构组成的双向夹紧液压夹具,分析了其工作原理,给出了理论与实际夹紧力的计算公式。相对于传统夹具,该类型夹具结构简单紧凑,刚性好,在输出力及液压缸直径一定的条件下,能显著降低系统的压力。 相似文献
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单缸双活塞正交夹紧液压夹具 总被引:1,自引:0,他引:1
介绍了2种基于单缸双活塞与双边铰杆一杠杆增力机构组成的正交夹紧液压夹具,分析了其工作原理与工作特性,给出了理论与实际夹紧力的计算公式。 相似文献
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介绍了6种铰杆-杠杆二次增力液压夹具的工作原理和结构特点,分析比较了它们的空间体积、输出力和结构刚性,并给出了相应的力学计算公式. 相似文献
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基于无杆活塞缸的斜楔增力液压夹具 总被引:1,自引:0,他引:1
液压传动夹具在现代制造业中应用极为广泛。液压缸的结构形式往往出于习惯而选择有杆活塞式液压缸。图1所示即为常用的基于有杆活塞液压缸的斜楔增力夹具,其工作时,斜楔的斜面在液压缸活塞杆的推动下作用于滚轮,使得杠杆式压板绕固定铰链轴转动,从而夹紧工件。 相似文献
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介绍了铰杆一杠杆增力机构与有杆活塞液压缸和无杆活塞液压缸组成的2种液压夹具,并通过对比提出了无杆液压传动相对于有杆液压传动具有结构紧凑、刚性好、摩擦损失小等优点. 相似文献
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基于杠杆-斜楔-铰杆三级增力的冲击式手动夹具 总被引:5,自引:0,他引:5
介绍了一种基于杠杆—斜楔—铰杆三级增力的冲击式手动夹具的工作原理,并给出了相关的力学计算公式。该夹具是手动敲击式的夹紧装置,能够在瞬间获得较大的作用力,而自锁则可以长时间保持输出力。 相似文献
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介绍了一种新型的基于无杆液压缸与对称铰链增力机构组合而成的液压夹具的工作原理。给出了相应的力学计算公式。该系统结构紧凑,力放大效果显著。 相似文献
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基于无杆活塞的铰杆-杠杆液压夹具 总被引:1,自引:0,他引:1
介绍了两种基于无杆活塞的液压夹具,分析了其工作原理,给出了相应的计算公式。此类夹具结构简单,制造方便,密封性好,具有广泛的使用前景。 相似文献
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阐述了以PowerBuilder为开发工具,应用SolidEdge软件进行液压缸设计的实现过程,给出了系统的体系结构,实现了液压缸CAD系统开发. 相似文献
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The hydraulic servo cylinders with conical–cylindrical hydrobearing can obtain a high normal load carrying capacity at the shoulder length ratio ns=0.8, and also avoid cylinder rod in collision with the sharp edge of conical surface. However, the effects of eccentricity and misalignment must be considered since aligning the centers of the hydraulic servo actuator with the applied mechanical load is concerned. In this study, eccentricity ratio is varied between 0 and 0.6 with misalignment factor up to 0.6 and 0.05 along the horizontal and vertical directions, respectively. Thermal effects that include isothermal, adiabatic and thermohydrodynamic boundary conditions on the bearing performance, such as pressure distribution, normal load carrying capacity and the frictional coefficient, are all examined herein. 相似文献
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本文针对钢球锁紧式液压缸的设计问题,分析了其受力情况,提出了三个设计条件,即自锁条件;解锁条件;承载条件。根据这三个条件,讨论了设计中的有关问题。 相似文献
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液压缸驱动的剪刀撑机构运动及动力学分析 总被引:1,自引:0,他引:1
对内装式液压缸驱动的剪刀撑机构进行运动学及动力学分析,推导出液压缸活塞运动速度与剪刀撑机构运动速度的关系式及活塞推力与剪刀撑机构荷重的关系式,并给出计算实例。 相似文献
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本文介绍了液压自定心夹具的工作原理和设计方法,并从加工、装配等方面说明了制造夹具的工艺控制要点和组装注意事项。 相似文献
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A laboratory simulation for stick-slip phenomena on the hydraulic cylinder of a construction machine
Stick-slip properties between steel and the glass fiber-reinforced nylon employed in the hydraulic cylinder of a construction machine were studied with a reciprocating tribometer as a laboratory simulator. A stick-slip evaluation method was established by introducing the running-in operation under certain operating conditions. Through studying the effect of sliding speed, the normal load and the viscosity, it was found that the sliding surfaces were operated in the mixed lubrication regime, where some friction modifiers were effective for elimination of stick-slip. Surface observation and surface analysis of the specimens after the tests indicated that stick-slip was mainly caused by an increase in the static friction coefficient due to transfer of iron oxide on to the seal surface from the steel surface. Subsequently, an attempt was made to correlate the results by the simulation test results for the hydraulic oil with those obtained by the hydraulic cylinder test. 相似文献