共查询到18条相似文献,搜索用时 62 毫秒
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轻质高强ZL109铝合金应用广泛,切削加工过程中易形成积屑瘤,导致加工表面粗糙度不受控。对ZL109铝合金切削加工表面粗糙度演变进行研究,通过改变背吃刀量和进给量,进行ZL109铝合金棒材切削加工,分析表面粗糙度的演变规律,并分析切削温度、表面微观形貌、切屑形态、刀刃损伤对切削表面粗糙度的影响规律。研究结果表明,加工表面粗糙度值随背吃刀量和进给量的增大而增大,且背吃刀量对表面粗糙度的影响较大。当进给量为0.25~0.5 mm/r,背吃刀量为0.25 mm时,加工表面粗糙度值最小,表面完整性最好,并且刀刃损伤程度最轻。 相似文献
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高速铣削7050-T7451铝合金表面粗糙度研究 总被引:1,自引:0,他引:1
高速铣削广泛用于航空铝合金材料的加工,以7050-T7451铝合金材料为试验对象,运用正交试验方法分析研究了铣削该铝合金材料时,切削速度、切削深度、切削宽度和每齿进给量4个因素对表面粗糙度的影响规律,并通过多元非线性回归分析得出表面粗糙度的经验公式.研究结果表明:加工表面呈交叉织网状形貌,表面粗糙度随每齿进给量和铣削深度的增大而增大,随切削速度的增大而减小,切宽对铝合金表面粗糙度的影响不明显.铣削参数对表面粗糙度的影响显著性依次为:每齿进给量fz切削速度v轴向切削深度ap径向切削宽度ae. 相似文献
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高速切削加工是数控加工发展的一个重要方向,根据高性能铝合金的使用性能,论述了铝合金加工中高速切削加工技术的应用及高速切削加工中的关键技术。 相似文献
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导电加热切削是在切削过程中,对工件和刀具导入电流的一种加热切削方法。它与普通切削方法相比,具有许多突出的优点,如提高刀具耐用度、减小切削力、改善加工表面粗糙度等等。本文试图通过实验对导电加热切削改善加工表面租糙度方面,进行一些研究和分析。 一、导电加热切削方法的原理 导电加热切削方法的研究是在CM6140型车床上进行的,采用单相整流滤波直流电源。图1为导电加热切削原理示意图。 相似文献
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响应面法在高速加工切削参数优选中的应用 总被引:2,自引:0,他引:2
讨论了响应面法的原理及应用,结合回归统计建立了淬硬模具钢高速铣削表面粗糙度的经验公式,并分析了切削速度、进给率和轴向切削深度对表面粗糙度的影响规律,为高速加工切削参数的选择和表面质量的控制提供依据。 相似文献
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为在曲面精加工中获得理想的表面粗糙度,通过分析表面粗糙度的形成机理,建立了粗糙度与走刀行距、进给率关系的数学模型;通过实验,建立了高速曲面铣削时粗糙度与加工倾角、主运动线速度关系的图谱,实现了在生产过程中按照加工目标的表面粗糙度确定相应的走刀行距、进给率、加工倾角、主运动线速度等加工参数.研究结果表明,该研究对提高加工... 相似文献
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Yonghao Luo Qingxuan Meng Wenji Xu Renke Kang Dongming Guo 《Machining Science and Technology》2016,20(1):44-61
To study the regular pattern of vapor-to-melt ratio in laser cutting sheet metal, a physical model of vapor-to-melt ratio is developed to demonstrate the material remove forms of vaporization-melt in cutting area and the state of energy and mass flow in the molten layer. Variation of vapor-to-melt ratio with laser power and cutting velocity is obtained by laser cutting of 6063 aluminum alloy sheet. The 0.5-mm sheet thickness is carried out on a JK701H Nd:YAG pulse laser cutting system by simulating under the regression correction of cut radius. Observation on the cut samples with different parameters (65 W, 85 W, 105 W varied with laser power increasing, and 2.2 mm/s, 2.0 mm/s, 1.8 mm/s with decreasing of beam cutting speed) and the calculations show that vapor-to-melt ratio increases (0.595–1.995, 0.672–2.631, 0.787–4.171) with laser power (65 W–110 W) and decreases with cutting velocity (1.8 mm/s–2.4 mm/s). At the same time, the laser cutting quality increases with vapor-to-melt ratio and the decrease with thickness of residual molten layer. The results show good agreement between vapor-to-melt ratio model and experiments. The analysis verifies that this model is feasible and it makes contribution to laser precision cutting. 相似文献
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使用硬质合金刀具、陶瓷刀具和PCBN刀具对渗碳淬硬钢20CrMnTi进行干式车削试验,通过测量不同切削条件下的表面粗糙度值,得出切削速度、进给量对表面粗糙度的影响规律,验证了以车代磨的干式切削渗碳淬硬钢20CrMnTi的可行性. 相似文献
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For the technology of diamond cutting of optical glass, the high tool wear rate is a main reason for hindering the practical application of this technology. Many researches on diamond tool wear in glass cutting rest on wear phenomenon describing simply without analyzing the genesis of wear phenomenon and interpreting the formation process of tool wear in mechanics. For in depth understanding of the tool wear and its effect on surface roughness in diamond cutting of glass, experiments of diamond turning with cutting distance increasing gradually are carried out on soda-lime glass. The wear morphology of rake face and flank face, the corresponding surface features of workpiece and the surface roughness, and the material compositions of flank wear area are detected. Experimental results indicate that the flank wear is predominant in diamond cutting glass and the flank wear land is characterized by micro-grooves, some smooth crater on the rake face is also seen. The surface roughness begins to increase rapidly, when the cutting mode changes from ductile to brittle for the aggravation of tool wear with the cutting distance over 150 m. The main mechanisms of inducing tool wear in diamond cutting of glass are diffusion, mechanical friction, thermo-chemical action and abrasive wear. The proposed research makes analysis and research from wear mechanism on the tool wear and its effect on surface roughness in diamond cutting of glass, and provides theoretical basis for minimizing the tool wear in diamond cutting brittle materials, such as optical glass. 相似文献