共查询到19条相似文献,搜索用时 156 毫秒
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本文建立了可转位刀片上反屑面为凸曲面断屑槽的截面模型──凸包型断屑槽,讨论了该模型各参数变化对切屑向上卷曲半径的影响,并对其截面参数设计进行了探讨。结果表明,本文提出的新的断屑槽截面设计方法简单、方便,具有实用价值. 相似文献
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陈舜青 《组合机床与自动化加工技术》1992,(6):35-39
本文通过实验研究和理论分析,讨论了前、后刀面磨损量对断屑槽断屑效果的影响及断屑槽槽形与磨损量的关系,还讨论了改变槽形以减少磨损量、提高刀具寿命并达到最佳断屑效果的断屑槽的设计原则。图4幅。 相似文献
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本文采用接触图形法和切屑折断性模糊估计等方法,对国外流行的可转位刀片复杂断屑槽的断屑机理进行了实验研究。研究结果表明:为了扩大断屑范围、改善断屑性能,这些断屑槽均采取了根据不同吃刀量和进给量改变有效槽宽,使切屑横截面弯曲、弹性挡屑、断屑槽形状、棱带宽度和刀尖圆弧半径的有机结合等措施。这些对于新型断屑槽型的开发具有重要意义。 相似文献
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本文采用接触图形法对硬质合金可转位车刀片UG型断屑槽的断屑机理进行了实验研究。结果表明:由于采用了根据不同切削深度和进给量巧妙改变有效槽宽、使切屑横截面弯曲呈拱形、弹形挡屑等措施,UG型断屑槽具有断屑范围较宽、在进给量较大时不易出现过分断屑等特点。此外,文中还对化学气相涂层刀片的UG型断屑槽在切削速度明显提高以后断屑范围的变化进行了研究。文中给出的UG型断屑槽的断屑范围图可供实际选用。 相似文献
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为了解决小切深小进给的断屑问题这一技术难题,该文从二维槽型的断屑机理出发,引进三维槽型促成断屑的主要的三个几何要素——斜槽、小凸起与波形刃,并对此三者进行了理论分析,在理论分析的基础上提出了精加工三维刀片新槽型方案。图13幅,表1个。 相似文献
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本文从结构上分析了硬质合金国产刀片和引进刀片的槽形设计的几点不同之处,进行了加工45号碳钢的断屑实验比较,并对现代槽形设计中的几个主要问题进行了探讨. 相似文献
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Investigation of chip in vibration drilling 总被引:5,自引:0,他引:5
Zhang Deyuan Wang Lijiang 《International Journal of Machine Tools and Manufacture》1998,38(3):165-176
Up to the present, all published vibration drilling chip-breaking theories have considered that for zero-phase-difference axial vibration drilling (ZVD), major cutting-edge chip-breaking was impossible, and have not discussed the chisel-edge chip. In this paper, the extruding action of the rake and the flank have been considered, the possibility of the major cutting-edge chip-breaking in ZVD has been verified, the chisel-edge chip formation in vibration drilling has been analyzed, and theoretical chip graphs have been drawn. The new chip-breaking theory has been confirmed by vibration drilling experiments using aluminum and stainless steel. 相似文献
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W. Grzesik E. Kwiatkowska 《International Journal of Machine Tools and Manufacture》1997,37(5):569-577
The paper presents some interesting findings which contribute to a better understanding of chip-breaking using grooved tool inserts to machine steels in a turning process. Experimental investigations were carried out including measuring the cutting force, cutting energy and the temperature at the chip-tool interface together with identification of the chip form. The experimentally obtained results were used to correlate the transition from unacceptable chip forms to the chip-breaking area (acceptable chip forms) with a critical value of the specific cutting energy. In particular, it was shown that the interface control factor was one of the most important factors controlling the mechanism of chip-breaking. Based on the experimental results there was distinguishable uniformity in distribution of the total cutting energy for finish, medium and rough machining operations. The beneficial effect of controlling the cutting contact area, with respect of energy reduction, became more significant with an increase in feed rate. 相似文献
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核反应堆压力容器进出口接管与主管道相连接部位的坡口形式为J形,且与球面相交,进出口接管间距小,要求焊后变形小,焊接难度较大。针对以上问题,开发了J型坡口自动焊接机,通过精巧结构的设计解决空间狭小的问题;通过多轴控制系统解决了复杂行走轨迹的生成、修正和简单化操作问题;通过合理的焊接方法和夹具的水冷结构,解决了焊接变形问题;通过双层保护气体的设计,解决了焊缝保护的问题。经实际焊接确认,该设备满足实际生产需要,填补了国内此类设备的空白。 相似文献
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介绍了飞利浦公司某款产品的塑料锁扣注射模,该模采用定模斜滑块进行外侧抽芯,采用“T形槽”锲紧块进行动模内侧抽芯。模具动作复杂,结构巧妙,其定距分型机构和推杆板先复位机构新颖可靠,值得同行借鉴。 相似文献
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