共查询到20条相似文献,搜索用时 73 毫秒
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贾德洁 《机械工人(热加工)》1995,(6):25-25
为解决图1所示的石棉垫圈加工问题,我们自行设计了一种简易冲裁模,其结构如图2所示。 1.冲裁模的设计 在设计冲裁模时,应保证冲孔工序中用的凸模棒3刃口尺寸等于工件孔的尺寸,凹模刃口尺寸等于孔径尺寸加上间隙值0.05~0.15mm.而落料用的凹模尺寸等于成品尺寸,凸模套2刃口尺寸等于成品尺寸减去间隙值0.05~0.15mm。因此,加工图1所示的 相似文献
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钟翔山 《机械工人(冷加工)》2008,(10):47-48
支撑板是我公司对外承揽的某产品上的加工件,生产批量较大,采用2mm厚的碳素钢Q235A钢板制成,其外形形状如图1示。一般来讲,对该类零件的加工需要冲孔一落料复合模和弯曲模两套模具完成,但用户要求用一副模具一次加工成形完成。 相似文献
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孙荣典 《机械工人(热加工)》2003,(5):88-88
图1所示为警用产品上的重要零件,材质为20钢,厚度为2mm。零件的特点是:两端的弯曲方向相反,而且两侧面也有弯曲,弯曲边较短,均为90°。如果采用常规方法进行,需要两副弯曲模弯曲两次。既增加了制造成本,又增加了装拆时间,从而降低了效率。为此我们设计了一套一次弯曲复合模。 相似文献
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任连梅 《机械工人(冷加工)》2004,(6):66-66
我厂为美国大平原公司生产一种农用设备行走轮配套设备,其中图1所示支承圈零件为厚2.5mm、08F钢板,制件表面要求光滑平整、无拉痕、皱折和裂纹,外形轮廓分明、清晰,Ф92mm孔有装配要求。支承圈需落料、拉深、冲孔等工序,为此设计了图2所示综合式复合模使落料、拉深、冲孔一次成形,提高了生产效率。 相似文献
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国内新型结构冲压模的应用 总被引:1,自引:0,他引:1
实际生产中,某些产品的成形往往需要冲裁方向或拉深方向与冲压设备滑块的运动方向垂直或成一定角度,这时可以采用楔块模结构将冲压设备的滑块方向转换成需要的加工方向。尤其在冲压复杂工件时,这种楔块模结构就显得特别重要。而我们在设计模具时,只需在原模具的基础上增加一个楔块机构就可以同时实现多种工序,既减少了模具数量,也减少了模具零件总数。而且还缩短了模具制 相似文献
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1.工艺分析
如图1所示弹簧垫圈,材料为厚2mm的65、70优质碳素结构钢或优质的合金结构钢65Mn。按传统的常规工艺加工的工序,有孔的加工,外形的加工、弯曲,热处理(淬火+中温回火),单工序机加工不仅费时、费料,而且效率低,生产质量难保证,故从经济性角度考虑效果较差。通过对工件加工工艺性分析,多个方案的比较,将工件的机加工工序改为用冲压加工来完成,比较合理。 相似文献
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Classical sandwich theory incorporates stretching and bending action in the facings and transverse shear deformation in the core. The theory presented here is intended for sandwich beams with relatively thick facings and moderately stiff cores of either bimodular material (which has different elastic moduli in tension and compression) or ordinary materials. Thus, transverse shear deformation in the facings as well as stretching and bending action in the core are also considered. Both analytical and finite-element results are presented and compared with the existing classical sandwich theory, which is shown to be unconservative in its predictions of both deflections and maximum shear stresses. 相似文献
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目前国内对大型液压设备的工作台面要求越来越大,精度要求越来越高,尤其是四角调平精度,现在只有极少数国家有能力设计制造能够满足要求的液压设备,但费用比较高.文中通过多轴同步控制技术和液压比例伺服控制技术相结合,使YT71S-3500玻璃钢液压机的四角调平精度控制在0.05mm以内,达到了国际先进水平,结束了高端液压设备完全依靠进口的局面,增强了国产大型液压设备在国际市场的竞争力. 相似文献
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A damage reference database from armor piercing bullet hits was established for tube and plate specimens with different thicknesses. The penetration damage diameters of the tube specimens showed larger at the center than the periphery in the front, but they resulted larger at the periphery than the center in the rear. As the angle of attack of the plate specimens increased, the penetration damage diameters increased as well, with the penetration damage diameters becoming larger in the rear than the front. Using the damage reference database, the fatigue analysis was performed to determine whether the safety requirements for the military aircraft could be met. 相似文献
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Simulation of pyramid type three-roll bending process 总被引:2,自引:0,他引:2
A simulation of the deformation of a workpiece with a U-shaped cross section in a three-roll bending process is performed. Based on the properties of the workpiece, the distribution of curvature and bending moment are calculated in accordance with the displacement and the rotation of the rolls. The relationship between the position of the rolls and the final curvature of the workpiece is obtained. An experiment is performed and the accuracy of the simulation is confirmed. 相似文献