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介绍了超硬刀具材料的发展概况和最新的超硬刀具材料,结合我国超硬刀具材料发展中的有关问题进行了综合分析,提出了解决当前我国超硬刀具材料发展中有关问题的对策,探讨了未来超硬刀具材料的发展趋势与应用前景。 相似文献
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干切混凝土时,金刚石锯片在实际工作过程中产生的振动和噪声是非常严重的。文章从理论上分析了混凝土锯切过程中的强振动、高噪音的原因。通过改变锯切速度、进给速度、切深以及通过采用两种不同的基体结构的锯片,研究了不同的切削参数以及锯片的结构对锯片振动和噪声的影响。在不同的锯切工艺参数和锯片结构下,测量了噪声值、噪声功率、噪声电压、振动功率和振动幅值,并对其进行频谱分析。可以从锯片的基体结构、金刚石节块的结构、锯切工艺以及锯机的整体性能等方面来进行改进,从而达到降低噪声与振动的目的。本文在理论分析和实验的基础上提出了一些降低噪声和振动的方法。 相似文献
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FK6V—700高速弹力丝机由于设计原因,加工111dtex以上产品时,产品质量不及FK6M—700。通过改变D/Y比、拉伸比、摩擦盘组合方式及改变摩擦盘材质对张力及张力比的影响,寻找到在全陶瓷摩擦盘中加入两片或两片以上聚氨酯摩擦盘和改变D/Y比,可以得到最佳工艺参数,从而使产品外观降等降低,染色M率提高,产品质量得到明显的提高。 相似文献
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PCD、PCBN切削刀具的发展浅析 总被引:2,自引:0,他引:2
从常用切削刀具入手,重点介绍了PCD、PCBN切削刀具的特点、性能、应用及其国内外发展,最后对国产PCD、PCBN切削刀具提出了几点建议。 相似文献
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J.M.DE MAN 《Journal of texture studies》1969,1(1):109-113
The work-softening of margarine and butter resulting from passage through perforated plates was determined. Various plates were used differing in size and number of perforations, but identical in the total area of perforations. Greater work-softening was obtained with plates having many small perforations, but the back-pressure in the equipment was higher. Passing the product through two or three plates slightly increased work softening. Additional mechanical action was provided by a propeller rotating immediately behind the perforated plates. Only small additional work-softening was obtained by this action and little remained after 8 days storage. Increasing the speed of the propeller up to 100 r.p.m. increased work softening. Increasing it to 300 r.p.m. did not further increase work softening. It appears that excessive mechanical action has little permanent softening effect on plastic fats. 相似文献