共查询到17条相似文献,搜索用时 296 毫秒
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这里以难加工材料钛合金为研究对象,针对钛合金材料的加工难点特性,选择目前国内相应的硬质合金材料,并优化组合出不同的钻头几何参数,进行了深孔钻削试验。通过对试验结果进行分析,确定出适合加工钛合金材料的深孔钻用刀片材料和几何参数。 相似文献
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钛合金深孔钻削刀具的试验研究 总被引:1,自引:0,他引:1
以钛合金深孔钻削刀具为研究对象,针对钛合金材料的难加工特性,选择了几种常用的硬质合金刀片材料,并优化选择不同的刀片几何参数,进行了深孔钻削试验。通过分析试验结果,确定出适合加工钛合金材料的深孔钻用刀片材料为YT726,其磨损特性优于其他刀片材料,钻削47.4mm钛合金深孔时,比较合理的刀片几何参数为前角γo=7°、后角αo=12°、余偏角ψr=15°、钻头偏心量e=3.8mm。 相似文献
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钛合金的切削加工性能差,其深孔钻削的技术难度更大。枪钻是深孔钻削的高效刀具,能有效解决钛合金的深孔加工问题。本文基于对钛合金材料切削性能和深孔钻削工艺的分析,通过深孔钻削试验,改进了钛合金叶片深孔钻削工艺,提高了枪钻寿命。 相似文献
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根据不同被加工材料性能和特点,分析了深孔钻削刀具刀片材料的选择原则,并通过几种典型材料的深孔钻削试验,证明内排屑深孔钻刀片材料选择的重要性。 相似文献
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<正> 钛合金的比强度大,韧性高,但其回弹量大,导热性差,因而切削性能下降,特别是小直径深孔钻削加工更为困难。本文仅从我厂的实际情况出发,就钛合金小直径深孔钻削在刀具材料的选择、切削用量及刀具几何角度的选配和切削液的选用等方面进行了初步试验和实践。1.钛合金在钻削加工中的特点钻孔时切削状况沿整个切削刃是变化的,对于普通麻花钻,由于钻头的前角由外圆向钻心逐渐减小,切削状况由里向外逐渐改善,而在横刃处的工件材料要承受 相似文献
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针对不锈钢、钛合金材料的深孔加工问题 ,分析了难加工材料的切削特性。从刀具设计及工艺方面 ,对高效深孔钻削进行了研究 ,并实际进行了切削试验 ,取得了较为满意的加工效果 相似文献
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The primary objective of this research was to develop relationships which predict tool wear from measured cutting forces. Different cutting speeds and feed rates were examined. The workpiece materials used were a medium-carbon steel and a titanium alloy. A synthetic cutting fluid was used with a 9.525 mm drill and a 6.350 mm drill, for drilling the medium-carbon steel and the titanium alloy, respectively. Preliminary testing was conducted to find the optimal values for cutting speeds and feed rates. The main drilling tests were performed using the cutting conditions resulting from the preliminary tests. Statistical analysis of the results of the main drilling tests showed that the axial force was significant at the 5 per cent level in models for both materials. It also showed that the moment about the vertical axis was significant at the 5 percent and the 15 per cent levels in the models for the titanium alloy and the medium-carbon steel, respectively. The model for the smaller holes drilled into the more homogeneous material, the titanium alloy, was more accurate in predicting tool wear. 相似文献
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钛合金TC4的钻削力试验研究 总被引:1,自引:0,他引:1
钛合金TCA属于较难加工材料,其小孔钻削尤为困难。为得到钻头直径、钻削参数(进给量、切削速度)和刀具材料对钻削力的影响规律,采用标准高速钢钻头对TCA与45钢进行了钻削对比试验,并用多元线性回归分析模型分别建立了扭矩和轴向力的经验公式。结果表明,TC4的钻削力比45钢大,钻削参数对钻削力的影响规律与45钢基本相同,即钻头直径对扭矩和轴向力影响最大,进给量次之,切削速度的影响最小。 相似文献
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David Olvera Gorka Urbikain A. Lamikiz P. Rodal I. Zamakona 《Machining Science and Technology》2013,17(2):173-188
In this article, results of helical ball milling for hole making on Ti-6Al-4V alloy are presented and compared with drilling. Two different machining strategies were tested with a ball end mill. In the first strategy only a helical milling path was used to achieve the nominal diameter. The second strategy has two stages; first, helical milling considering a diameter 50 µm below the nominal, and second, the tool flank of the ball end mill were used to remove the stock left with a single contouring operation. Experimental tests were performed taking into account the process time, final quality of holes, hole diameter, roughness and burr formation at tool entrance and exit. With helical milling two advantages were concluded: the process is versatile because one tool is suitable for a range of diameters and negligible burrs are produced. However hardness in the zones close to hole internal surfaces machined with the ball end mill tool decreases with respect to twist drilling. The information obtained from this research work defines suitable cutting parameters for the helical milling process in the titanium alloy Ti-6Al-4V with ball end mills. 相似文献