Results 31 to 40 of about 152,043 (117)
为了分析PDC全钻头破岩中单齿受力,一方面通过对比不同切削参数影响下,PDC单齿破岩数值模拟中采用的MohrCoulomb本构模型与Drucker Prager本构模型计算结果,评判了模型的计算效率与精度;另一方面进行了PDC全钻头破岩试验,建立了同比条件下更为精细化网格的PDC全钻头破岩有限元模型,将数值模拟结果与试验结果进行了对比。分析结果表明,在不同的工况下,MohrCoulomb模型计算的结果误差虽然比Drucker Prager模型略高,但Mohr ...
doaj
The research of metal cutting under tool vibration based on CEL method
金属高速切削是一种重要的加工成型工艺, 已经成为机械制造业中运用最 广泛的基础加工技术。 为了得到良好的加工效果,要求在加工过程中刀具和工 件组成的切削系统具有稳定而精密的特点。在实际切削过程中刀具与工件组成 的系统难以避免会产生振动现象, 振动对工件精密加工带来严重挑战, 这就需 要科研工作者对切削过程中振动现象展开深入研究。 以往对振动切削的研究主要集中在理论和实验方面, 由于高速切削涉及到 高应变,高应变率以及高温等机理, 是一个复杂的材料非线性问题,纯粹的理 论研究一方面需要大量而繁杂的公式推导,
陈相宇
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Based on investigating and cutting test, Hobbing technology anaiysis of surface hardened gear with carbide hob was made. Design and cutting condition of carbide hob with radial negative front angle were discussed.
张晋
doaj
In order to solve the problems existing in geometric simulation of spiral bevel gear and hypoid gear cutting process,such as slow speed,low precision and lack of independence,slice algorithm is presented.The five axis numerical control simulation system ...
李敬财 +4 more
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The conicity cutting method and generating theory are introduced on the spiral bevel gears.Based on the local synthesis method,the preconditions of performing the conicity cutting on the pinion are presented.By using the tooth contact analysis,the mesh ...
聂帅强, 魏冰阳, 邓效忠
doaj
AutoLISP环境下模拟范成法切削生成齿轮模型及齿厚控制与测量
A discussion of using AuotLISP to develop programs and simulation using generation method to cut and generate the 3-D models of gears is presented. The gear models are obtained through cutting,and the involute and the transition curve of tooth profile of
周太平, 叶爱雪, 张蓬
doaj
本发明公开了一种基于霍普金森压杆加载技术的高速切削实验装置,包括动力机构、切削机构、固定机构和收捕机构,动力机构、切削机构、固定机构和收捕机构沿一轴线依次排布,动力机构用于向切削机构发射弹丸,通过弹丸撞击切削机构从而推动切削机构的入射杆前行,随着入射杆前行,入射杆前端设置的刀具切削固定机构上固定的工件;收捕机构用于抵挡前行的入射杆,使入射杆快速停止。本发明的整个实验装置基于Hopkinson压杆加载技术搭建,整个切削过程速度快、历时短,加之冲击能量远大于切削所需能量,可视为稳态过程 ...
叶贵根 +5 more
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磨齿机的效率是其生命力的象征,为此,提高磨齿机的工作效率已成为世界各国致力研究的共同目标。近年来,世界上的磨齿机生产厂为了满足各工业部门对磨齿机效率所提出的迫切要求,在应用 CBN 砂轮及改善冷却润滑条件等方面作了大量的试验研究工作,并不断改进机床结构,善遍采用 CNC 技术,提高自动化程度,实现自动工作循环,同时,不断改进磨削原理,采用新的磨齿工艺和方法,使磨齿机取得了长足的进展。尤其是高效的数控立方氮化硼蜗杆砂轮磨齿机和数控立方氮化硼成型砂轮磨齿机的开发,将使磨齿机的应用变得更为有效,更为普遍 ...
柏鸿文
doaj
Development of Free Cutting 22CrMoHS Gear Steel
The free cutting 22CrMoHS gear steel (/% :0.19 〜0.25 C,0.80~1.00 Mn, W0.025 P,0. 040 ~0. 060 S,l. 00 〜1.40 Cr,0. 35 -0.45 Mo) is developed by Suzhou Steel Group. The range of sulfur content in steel is 0.040% ~ 0. 060%.
乔晓阳, 裴小芳, 崔冕, 周志伟
doaj
Aimed at a kind of rotary cutting machine,the machining process of involute gear chamfering is kinematically analyzed,and the moving locus equations of cutting edge are deduced.The chamfering process is dynamically simulated.The analyzing results provide
胡昌军, 钱瑞明
doaj

