共查询到13条相似文献,搜索用时 265 毫秒
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异形凸曲前刀面硬质合金插齿刀制造模型研究与应用 总被引:1,自引:0,他引:1
随着硬质合金刀具的广泛应用,硬质合金插齿刀的研究越来越受到齿轮制造业的重视。从提高新构形硬质合金插齿刀异形凸曲前刀面铲磨精度的角度出发,根据微分几何的包络理论及新构形异形凸曲前刀面硬质合金插齿刀设计模型,推导出铲磨新构形插齿刀异形凸曲前刀面的数学模型,根据制造模型成功制造出新构形插齿刀。 相似文献
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新构形硬质合金插齿刀切削刃几何角度分析 总被引:1,自引:0,他引:1
提出了一种硬质合金插齿刀的新构形方法———异形凸曲前刀面硬质合金插齿刀,对新构形插齿刀的前角、后角及刃倾角进行了分析;建立了切削刃几何角度的数学模型,与原构形硬质合金插齿刀进行了比较研究。 相似文献
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针对新构形硬质合金插齿刀凸曲前刀面的构形特点,运用空间曲面族求包络面的运动学方法和理论设计了凸曲前刀面的加工工艺方案,确定了各坐标轴的位置和运动关系,开发了插齿刀凸曲前刀面专用加工设备。针对正弦波形凸曲前刀面求解了数控加工刀位特征点并进行了砂轮加工轨迹拟合,进行了模数为5mm、齿数为21的插齿刀凸曲前刀面磨削实验,实验结果验证了所设计的加工方法及开发的机床能够满足加工要求。对21个齿前刀面进行了变参数磨削,通过对实验结果的检测与分析,得出了相对稳定的表面粗糙度区域所对应的3个砂轮转速及进给量区间。 相似文献
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凸曲前刀面硬质合金插齿刀齿形精度分析 总被引:2,自引:0,他引:2
分析了锥形前刀面硬质合金插齿刀齿形误差,提出一种凸曲前刀面硬质合金插齿刀并对二者的齿形精度进行了比较。为提高硬质合金插齿刀的抗崩刃能力,需要采用负前角的特殊设计;但负前角的绝对值越大,抗崩刃能力越强,齿形精度下降越快。而硬质合金插齿刀的凸曲前刀面设计可很好地解决这个问题。 相似文献
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基于DEFORM - 3D软件对凸曲前刀面插齿刀插削过程进行仿真,分析插削温度对刀具磨损影响情况.结果表明,在插削刃附近温度梯度很大,温度高,相应刀具磨损量大;刀具前后刀面距插削刃相等地方的温度趋于一致;后刀面温度梯度大,相应刀具磨损量较大,即后刀面磨损较为前刀面严重;在与切屑分离的地方,温度梯度最小,虽有温度变化,但... 相似文献
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H.-Y. Lai D.-S. Wu 《The International Journal of Advanced Manufacturing Technology》2002,19(7):482-491
This paper presents a systematic CAD/CAM based geometric modelling technique for enhancing the manufacturing accuracy of general
straight-tooth shaper cutters. The proposed modelling technique systematically computes and improves on the shape of general
shaper cutters using a five-step procedure. In the first modelling step, the significant geometric parameters of shaper cutters
which including tooth profile, rake and clearance angles, offsets, and backlash are estimated using criteria associated with
the practical requirements and the theory of gearing, differential geometry, and motion theory. In the second modelling step,
the precise cutting-edge curve model of the shaper cutter is constructed. The theoretical involute or cycloidal cutting-edge
curve on the plane perpendicular to the motion axis of the shaper cutter is first computed and is then projected onto the
conic surface of the shaper cutter which has both the rake and the clearance angles. In the third modelling step, the convoluted
sectional profile of the diskshaped generating cutter required for producing the cuttingedge profile is established using
the theory of gearing and the relative motion relationship between the grinder and the cutter in the manufacturing process.
In the fourth modelling step, a simple procedure to obtain the profile shift coefficient of the shaper cutters from various
given process parameters is presented. Shaper cutters of various shapes can thus be designed and produced. In the last modelling
step, a practical working example for producing the precise disk-shaped generating cutter and associated shaper cutter is
presented to illustrate the effectiveness of the proposed modelling approach. The results of numerical modelling indicate
that the proposed approach is systematic, accurate and reliable for producing shaper cutters of various shapes. 相似文献