共查询到12条相似文献,搜索用时 62 毫秒
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以目前生产设备的大型化趋势为背景,初步提出了利用气垫搬运系统来代替传统的运输、搬运方式的构想,即运用气垫技术和气囊原理实现了大型构件的搬运和翻转.在采用气囊作为大型构件翻转操作的主要设备的前提下,对气囊的布置、所需气囊数量、气囊的尺寸进行了相应的设计.旨在有效配合外围垫升系统运行,达到垫升、移动和翻身的目的. 相似文献
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介绍了一种自定心中心架,与目前机床上普遍采用的传统式中心架相比,可大大节省装卸工件的时间,并可减少找中心的麻烦。这种中心架性能可靠,精度好,对提高产品质量具有实用意义。 相似文献
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从磨床砂轮架的使用性能、结构设计、制造工艺、装配方法等方面,分别对其进行比较分析,给出不同砂轮架的正确设计方案和制造方法,从而满足性能各异砂轮架的不同要求. 相似文献
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针对中等批量加工轴承架上相互垂直的表面上的7个孔,设计了一种翻转式钻床夹具(钻模).传统的方法是设计两套夹具,当加工完一个表面上的孔时需要在另外一套夹具上从新装夹工件,生产效率低.为克服此问题,在夹具重量不增加的情况下设计一套钻床夹具,即可完成两套夹具的工作,而且工件一次装夹,避免了因重复装夹而产生的误差,减少了夹具的调整时间. 相似文献
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Sa-Hwan Leem Jong-Rark Lee Yong-Jeong Huh 《Journal of Mechanical Science and Technology》2008,22(8):1554-1560
From time immemorial, there have been 3E problems of energy, economy and environment. In particular, problems of energy and
environment become increasingly serious after the industrial revolution. The demand for gas as an ecofriendly energy source
is also increasing. With the demand, the installation and the use of gas boilers have also increased, so the damage to human
life by the waste gas (CO and CO2) continues increasing every year. Hence, the aim of this study was to investigate the concentration of CO (Carbon Monoxide)
by the length and the variation of the bent tube of the exhaust pipe by installing a boiler with the same method as a household
boiler and to discover the harm to humans. For the effect of the length, the allowable concentration of CO is 50ppm, and the
3m of the once bent tube starts exceeding the allowable concentration of CO after 5 minutes, and the 4m and 5m starts exceeding
after 3 minutes. In addition, the 1m of three times bent tube starts exceeding the allowable concentration of CO after 3 minutes. 相似文献