共查询到20条相似文献,搜索用时 58 毫秒
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梁明忠 《机械工人(冷加工)》1991,(3):16-16
我厂是生产汽车配件的专业厂,过去在切削加工各种形状的产品时,多采用焊接硬质合金刀具,刀杆材料消耗大,刀片寿命受到严重影响,为此,革新一多用刀杆,采用后解决了上述矛盾,此刀杆有如下优点: 相似文献
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钱桂荣 《机械工人(冷加工)》1991,(11):24-25
不锈钢材料既硬又韧,切削性能差,我厂加工不锈钢缸套时,成功地使用机夹套料刀,既提高了工效,又节省了昂贵的不锈钢原材料。 缸套(φ160×284×φ112mm)套料工料如图1所示。材质为耐热不锈钢3Cr13。 相似文献
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苏明生 《机械工人(冷加工)》1991,(8):22-22
如图所示,为我们制作的机夹式切断刀,经生产验证效果较好,现介绍如下: 一、刀具特点及注意事项 (1)刀体为T8工具钢,淬火硬度HRC45。安装刀片的刀槽枉工具磨床上加工到所需尺寸,或按刀片实际尺寸配磨,刀片与刀槽的配合间隙为0.002mm。 (2)刀片材料W18Cr4V,淬火硬 相似文献
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谭礼银 《机械工人(冷加工)》1990,(4):13-14
在1987年以前,新疆境内生产的灰铸件长翼型散热器为大、小60型暖气片.使用的刀具都离不开焊接刀,由于焊接刀本身的缺陷,刀具消耗大,特别是刀体材料消耗较大,加工产品的质量差、生 相似文献
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提高生产率的模块刀夹 总被引:1,自引:0,他引:1
自立 《世界制造技术与装备市场》2002,(6):54-54
同为模块快速换刀刀夹装置,但新的生产率比旧的要提高10%,机床使用率提高20%,刀具寿命延长50%~70%。 相似文献
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将来高速主轴用的刀夹 总被引:1,自引:0,他引:1
自立 《世界制造技术与装备市场》1999,(4):104-105
本文介绍了用于主轴各种速度下的刀夹。一般速度下用弹簧夹头和液压夹头。随着主轴转速的提高,在10000r/mm以上的刀夹有德国生产的HSK型和日本生产的Big Plus型刀夹。为用于更高速度开发的收缩夹紧刀夹的试验速度达到了266000r/min。 相似文献
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为了解决高速高精直线电机应用于机床上时滚动直线导轨缺乏制动功能的问题,将气动制动技术运用于直线导轨的制动系统中,设计了一种新型气动式钳制器。首先,分析了钳制器的结构特点及工作原理;然后,通过对内部结构的受力分析,给出了输出力及增力系数的计算公式,并确定了其不自锁的条件。最后,通过对各个参数的分析,得出了在润滑条件和无润滑条件下楔形角、滚动摩擦系数及滑动摩擦系数对增力比的影响关系。研究结果表明,在无润滑条件下得到的增力系数范围为7.46~10.76,有润滑条件下得到的增力系数范围为17.72~18.38。计算结果与试验值的比较结果显示,两者基本吻合,验证了力学分析的正确性,从而为设计较大增力系数的新型气动式滚柱直线导轨副钳制器提供了理论依据。 相似文献
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Masahiko Yoshino Takashi Matsumura Noritsugu Umehara Yoichi Akagami Sivanandam Aravindan Takenori Ohno 《Wear》2006,260(3):274-286
This paper proposes a new concept of the ‘engineering surface’, which extends the conventional idea of a functional surface by combining it with micro/nano manufacturing technology. Characteristic features and possibilities of the engineering surface are discussed in detail. This paper reviews studies on micro/nano fabrication technologies for advanced materials and evaluation technology for surface function. New fabrication technologies, micro machining and nano forming, are introduced, which will be basic manufacturing processes of the engineering surface. Also, a new surface evaluation technique is introduced for the surface energy of the nano fabricated surface. Design of a new DNA micro array chip is introduced as an example of applications of the engineering surface. Controllability of surface property by nano fabrication is studied. 相似文献
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Zhiqiang Liang Shidi Li Tianfeng Zhou Peng Gao Dongdong Zhang Xibin Wang 《The International Journal of Advanced Manufacturing Technology》2018,97(1-4):39-50
Micro ball-end milling is an efficient method for the fabrication of micro lens array molds. However, it is difficult to meet the machining quality of micro dimple molds due to the wear and breakage of the milling cutter, which presents large challenges for designing geometric structure and edge strength of micro ball-end mills. In this study, a new configuration of a micro ball-end mill for micro dimple milling is designed and named the micro conical surface ball-end mill. The cutting edge is formed by intersecting the conical surface and the inclined plane. A practical grinding method is proposed based on the kinematic principle of the six-axis computer numerical control (CNC) grinding machine for micro conical surface ball-end mills and is validated by grinding simulations and experiments. Micro dimple milling experiments are conducted on the hardened die steel H13 to investigate the cutting performance of the mill. The milling force, the micro dimple roundness error, and the tool wear morphology are observed and analyzed. The results show that the radial milling force is more stable and the wear resistance is improved for the micro conical surface ball-end mill compared to the traditional micro spiral blade ball-end mill. Therefore, a more stable roundness at the entrance hole of the micro dimple can be obtained by using this design after a number of micro dimples have been milled. 相似文献
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An analysis of a model of the process of cold-driving a rivet is carried out with the primary aim of identifying the origin and magnitude of the resulting clamping force exerted by the rivet on the lapped sheets. The development of high hydrostatic pressure in the rivet shank in the first stages of the driving process, and its subsequent release as the rivet head is squashed, is the key to understanding the origin of the clamping force. The average clamping stress in the rivet shank is on the order of
, where
is the yield stress of the rivet. The model is used to explore the role of some riveting variables, including differing yield stresses in the rivet and sheet materials, strain hardening, and head size. 相似文献
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