切屑

Based on the analysis of the process of free orthogonal metal cutting, the theory of elastic-plastic distortion and temperature field was discussed. Yield rule, intensify rule, fluxion rule, types of contact and diathermanous model of metal cutting were also analyzed detailedly. The FEA model of stress field and temperature field of free orthogonal metal cutting were established by the fundamental idea of FEA. State nonlinear, material nonlinear and geometry nonlinear thermal-stress coupling were analyzed by FEA technology. The separate criterion of chip and dispose of contact types were research emphatically.

本文在直角自由切削过程分析的基础上，讨论了金属切削过程中的弹塑性变形理论和温度场理论，详细分析了屈服准则、强化准则、流动准则、金属切削传热模型、接触类型等问题，并利用有限元的基本思想，建立了直角自由切削应力场和温度场的有限元模型，进行了状态非线性、材料非线性和几何非线性的热力耦合分析，重点研究了切屑分离标准的确定、表面接触类型的处理等问题。

As a result, the chips produced break up easily and are small; this improves machinability.

其结果是使切屑容易断开而变小，从而改善了可加工性。

The work area of the machine is enclosed by a sheet metal enclosure with shatterproof windows and manual sliding doors, which protects operator against splash and chips.

机床的工作区用金属板封闭，手动滑门，护罩上的视窗采用防碎玻璃。这些措施防止飞溅和切屑对操作者的损伤。

Compared with the numerical model, the analytical model is more propitious to studying relationship between process parameters and surface geometrical error.

通过研究这些因素，基于铣削力/铣削扭矩和瞬时未变形切屑厚度的关系，建立了一个考虑了铣削力/铣削扭矩的解析模型，用来预报在端铣情况下工件的表面几何误差。

The present invention is suitable for aluminum casting requiring high antiwear property and Al-Si alloy with smelted waste material.

本发明适用于要求耐磨性高的铝铸件，以及熔化大量废、旧零件以及切屑的铝硅合金。

Unfortunately, coolants create high coats in production and can be hazardous to the environment and human health.

当今机械切削加工领域大量使用切削液，目的是为了在切削加工过程中冷却工件、刀具和机械设备，此外还可以降低摩擦力和促进切屑排出切削区，但是由于使用了切削液，增加了生产成本，同时对环境造成污染，损害人们的身体健康。

In face milling the generated flat surface is at right angles to the cutter axis and is the combined result of the actions of the portions of the teeth located on both the periphery and the face of the cutter.

在两种铣削方法中，切屑的形成是不同的，逆铣过程中，刀具有推动工什丌使工件从工作台上提升的趋势，这种作用有助于消除铣床工作台进给螺杆和螺母间的间隙，从而形成平稳的切削。

The article studies the relationships of geometry parameters, movement parameters and coal lump section of continuous miner.

本文由连续采煤机几何参数和运动参数与切屑断面积的关系式，定性分析了各种因素对落煤块度的影响。

NC lathe virtual manufacturing whole machining environment chip simulation machining quality simulation

数控车床；虚拟制造环境；全景仿真；切屑仿真；加工质量仿真

A three-dimensional finite element model for precision cutting 3J33 maraging steel using the commercial software Marc is presented to study the effect of tool nose radius on chip formation, the principal cutting forces and the temperature fields.

在商业化软件Marc的基础上建立了圆弧刃精密切削三维有限元模型，研究不同半径的圆弧刃精密切削条件下主切削力、切屑形状和切削温度场分布。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。