共查询到20条相似文献,搜索用时 40 毫秒
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我公司生产的角接触球轴承 ,部分保持架为青铜实体保持架。装配时 ,为了防止钢球从保持架内径方向掉出 ,产品图上规定钻孔后在保持架内径上压印。但在实际生产中 ,经常出现锁量过大或过小 ,因而造成装配困难。下面以QJ32 4Q4( 1 7632 4QT)保持架为例 ,对压印锁量工艺的改进作一论述。图 1图 1所示为产品图压印锁量尺寸 ,R、t和h由试压规定 ,其要求为装配时钢球从内径方向推入兜孔后不能掉出。原压印锁量为利用模具在压力机上完成 ,由于材料及内径公差的影响 ,压轻了不能锁住钢球 ,压重了装钢球时容易掉渣 ,造成装配困难。 图 2所… 相似文献
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针对推力球轴承实体保持架在安装使用中出现的相互摩擦掉屑,产生噪声、异常声等质量问题,设计了组合实体保持架。针对设计的关键问题,重点介绍了上、下模和锁点的设计。 相似文献
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周建美 《机械工人(冷加工)》2009,(11):42-43
圆柱滚子轴承槽形保持架装配中,由于该保持架结构复杂,装配时在内翻边上压锁点圆窝后,因过梁的弯曲和压缩变形,使保持架窗孔长度缩短,内翻边和锁点圆窝等部位与滚子有干涉现象(俗称夹滚子),使轴承回转灵活性差,其装配后的结构形状如图1所示。本文就如何保证轴承装配后回转灵活性,对保持架压印模设计做一些分析。 相似文献
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实体保持架滚子的锁紧是圆柱滚子轴承装配的重要环节。内压印模采用.窗口定位单柱悬臂结构,通过受力分析和生产实践证明,把模具中连接杆的结构由平板改为直角梯形非常合理。 相似文献
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原来生产的推力球轴承的钢球数量为偶数且钢球直径较小。根据市场需要,开发设计了大量奇数钢球和钢球直径较大的轴承产品。为满足该类轴承的生产需要,对原铜保持架锁球模具结构进行了改进,保证了产品质量和生产效率。 相似文献
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通过对浪形保持架球兜间隙影响球轴承动态性能的分析,确定了优化设计的205轴承浪形保持架整形模中主要零件冲头与凹模的设计方法。附图7幅,表2个,参考文献1篇。 相似文献
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采用保持架梁压斜坡形式,提高保持架强度,改善与滚动体的接触性能,延长轴承使用寿命,提高轴承质量。 相似文献
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针对圆锥滚子轴承筐形保持架在压靠时出现的压伤和梁塌腰现象,分析了产生原因,采取了改进设计,避免了此现象的发生。 相似文献
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针对198905k轴承压外罩时存在基面凹心、外罩与座圈相对转动、模具心柱定位不准确等问题,对一些模具参数进行了改进,并增加了垫圈,圆满地解决了以上问题,提高了装配质量和生产效率,降低了成本。 相似文献
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V. N. Vinokurov A. V. Emelyanov 《Journal of Machinery Manufacture and Reliability》2014,43(4):306-310
A flat axial bearing with pressurized gas supply through an annular flow valve made from anisotropic porous material is considered. The differential equation for the pressure in the lubricant layer adjacent to the porous wall is numerically solved using the Runge-Kutta method, with two boundary conditions taken into account. One of these, which is integral, has remained out of sight in the porous support analysis until recently. An algorithm for calculating the lifting force and rigidity of support as well as mass rate of gas flow through this support is presented. The optimization of support is performed, and conclusions are drawn as to its influence on different factors. 相似文献
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石墨以其良好的性能和一定的机械强度及优良的加工性能等特点而成为金刚石工具制造中为数不多的热压模材料中的首选材料 相似文献
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Johan Berglund Magnus Liljengren Bengt-G?ran Ros��n 《The International Journal of Advanced Manufacturing Technology》2011,52(1-4):115-121
Machine hammer peening (MHP) is a new method for finishing of surfaces. With this method, the workpiece surface is hammered with a spherical carbide tool. The main objective of the study was to evaluate whether the MHP method could become a plausible substitute for manual polishing in pressing die manufacturing where nodular cast iron is a common workpiece material. To do this, sample nodular cast iron surfaces were hammered and evaluated. Changes to the surfaces were evaluated using surface roughness measurements, hardness measurements and optical images. First of all, the workpiece surface was smoothened. Secondly, the surface hardness was increased significantly. Thirdly, the nodules on the workpiece surface were affected. They appeared to be smaller and not as visible. This effect would likely create a die surface less prone to galling since the cavities would not be filled with sheet metal to the same extent in a forming operation. In addition, with MHP, the amount of polishing needed to manufacture a die surface can be reduced because of the smoothening effect. 相似文献
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通过改进筐形保持架一次压坡凹模开槽的结构,提高了一次压坡凹模的使用寿命,节省了模具,降低筐形保持架的加工成本. 相似文献