共查询到20条相似文献,搜索用时 375 毫秒
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细长轴加工是车削加工中难度较高的一项工作。一般都采用焊接刃磨刀具加工细长轴,这里就如何选用机夹刀具高速加工细长轴的问题谈谈我们的体会。一、刀具的选择与修整(图示)我们选用沱江工具厂生产的刀体,型号为90W-25T3K13,夹固型式为内杠杆式,刀片选用T3K1305 A3型(一机部标准)YT 14(若用YT 15的更佳)。刀片装夹后由刀体的倾斜形成6°的主、副后角 相似文献
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1.推土机铲刀角度和其适应的作业条件推土机铲刀在作业中通常有平面角(α)、倾斜角(β)和铲土角(γ)三个基本角度(见附图)。(1)平面角平面角是指在水平面内,铲刀与推土机纵轴线所夹的锐角或直角(附图a)。推土机根据铲刀平面角是否能够变化,分为固定铲推... 相似文献
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桂育鹏 《机械工人(冷加工)》1980,(9)
45°粗、精两用机夹端铣刀,吸取了日本、瑞典粗、精加工两种端铣刀的特点,结合我国机夹端铣刀的结构型式综合为一种改进而成。是一种能同时粗精加工、适于大走刀切削的机夹端铁刀。加工钢件时,走力量可达1250~3200毫米/分,表面加工光洁度为▽5~7。设计原理及特点1.刀具几何角度选择合理 相似文献
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于建波 《机械工人(冷加工)》2010,(6):38-39
在机械零件加工中插槽加工一般为单刀加工,我们根据零件的加工要求,设计了一种双刀机夹式插刀,不但降低了刀具费用和零件加工成本,而且提高了零件加工质量和生产效率,解决了生产中的实际问题。 相似文献
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本文是研制国产化可转位机夹具的技术和经验总结,重点论述了在消化吸收国外产品技术的基础上设计可转拉机夹刀具的结构,采用普通机床代替加工中心,加工高精度的机夹刀具的元件,并介绍了可转位机夹刀具的加工工艺。 相似文献
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殷宏生 《机械工人(冷加工)》1995,(8):5-5
我厂加工的零件材料大都为45钢和27SiMn钢调质材料,强度较高,切削加工容易打刀。由于生产批量大,因此对刀具的需求量相应也较大。为了减少刀具费用,充分利用机夹可转位刀片。我们设计制作了机夹可转位强力内螺纹和内切槽刀,在生产实际中,深受操作者的欢迎。 相似文献
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弧面分度凸轮的非等径数控加工自动编程 总被引:3,自引:0,他引:3
弧面分度凸轮廓形的非等径加工自动编程,能够及时有效地补偿刀具尺寸的变化,保证加工精度,降低刀具费用.文章介绍了在三轴联动数控机床上加工弧面分度凸轮时,非等径加工刀具轴线的确定、编程坐标换算和自动编程应用程序框架,并给出了非等径加工程序实例. 相似文献
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J. N. Lee 《Journal of Mechanical Science and Technology》2007,21(10):1644-1650
The geometry of helical milling cutter with specific cross-section profile is normally generated with form cutter by the toolpath
generating method. The general purpose CAD/CAM software can generate the cutter location file of this class of product only
by the sculpturing method. To obtain the flexibility of machining process, this paper presents an interference-free toolpath
generating method for semi-finish and finish machining of the helical milling cutter. The method for design and machining
of the helical milling cutter is established based on the differential geometry and the enveloping theory. In the finish machining
of helical milling cutter, the form grinding wheel profile is firstly derived. To reduce the cost and lead time of the generating
method with the form-mill cutter for semi-finish machining, a toolpath generating method which combines the advantages of
the generating method and sculpturing method was presented. The cutter location uses ball-nose conical end mill is derived
according to the geometric characteristics of the enveloping element. The cutting simulations with solid model were performed
to verify the proposed toolpath generation method. 相似文献
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采用不同结构、精度的数控铣床,用两种结构铣刀加工汽封弧段,用可转位刀片加工试验,总结出相应材料应该采用刀具的几何参数、材质及机械加工切削参数。有利于在此类零件的加工中,为工艺编制、工人操作提供方便,加工参数更加规范,可以大大降低刀具使用成本,提高加工效率,更好地保证产品质量。 相似文献
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为了使多点切触加工算法具有更广泛的普遍性并降低原有的多点切触加工算法的计算耗时,对采用圆环面刀具和工件曲面实现多点切触加工的算法原理进行了分析,得到了多点切触加工中圆环面刀具的定位方法;同时提出了一种新的多点切触加工的加工误差控制方法。为了控制多点切触加工中两个切触点之间的最大欠切误差,建立了以两个切触点间参数差值圆半径为自变量的函数方程,采用割线法迭代求解该函数方程,可以得到在允许加工误差下的最优参数差值圆半径和当前的最优刀位。通过实例验算表明,采用圆环面刀具的多点切触加工的刀位计算可以获得很宽的加工刀轨,而采用割线法进行加工误差控制的多点切触加工刀位算法和Hermite算法相比,计算耗时明显减少,在曲面加工的刀位计算中更加实用。 相似文献
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讨论基于数控加工的箱体零件创成式CAPP系统中的关键问题——刀具选择。通过对此选择过程进行优化分析,建立了以加工质量、加工效率和成本等多种因素共同作用的优化决策理论模型。 相似文献
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研究铣削加工过程中加工误差的预测及控制策略是进行加工质量控制的核心环节,对于实现加工过程的高效化和精密化至关重要。针对刀具柔性较大的铣削加工过程,以周铣加工过程中的刀具变形及刀齿轨迹计算为基础,建立一种新的加工误差预测模型。该模型从铣削力的预测和刀具变形的计算出发,采用圆弧近似方法求解各刀齿的运动轨迹,然后将各刀齿轨迹离散,通过计算各离散点处所有刀齿轨迹的最小值获得加工误差。与现有方法相比,该建模方法的显著优点体现在两点:一方面,建模过程较完整地揭示了铣削加工中加工误差的形成机理;另一方面,由于考虑了刀齿轨迹对加工误差的影响,模型的预测结果能够反映已加工表面的形貌。模型的有效性通过一系列铣削试验得到了验证。 相似文献
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Ming Luo Dongqing Yan Baohai Wu Dinghua Zhang 《The International Journal of Advanced Manufacturing Technology》2016,85(9-12):2495-2503
Improvement of machining efficiency is always one of the most interesting problems in CNC machining. Traditionally, the ball-end cutter is widely used in sculptured surface machining for the highly flexible controllability. But the process efficiency is low especially for freeform surface machining, which generally needs multiple tool-paths. To improve the machining efficiency of multi-axis flank milling of freeform surface, a novel barrel cutter design method is proposed in this paper. There are two principle parameters determining the revolution surface of the barrel cutter: the radius of the generatrix curve and the maximum rotating radius. The main work in this paper is to calculate the two parameters for strip-width-maximization machining without local over-gouging. Firstly, the curvature properties are introduced by the geometry model of the barrel cutter. Then the contact condition between the barrel cutter and the freeform surface is analyzed, relationship between cutter parameters and surface curvature is derived. To avoid the over-gouging, based on the curvature constraint, the designed surface is fitted into the cutter surface by surface approximation theory, so that the cutter surface can approach to the designed surface as close as possible. After that, toolpath planning method for milling of freeform surface with the barrel cutter is presented. Finally, machining implementations are presented to verify the effectiveness of the proposed method. 相似文献