Nc incremental sheet parts forming process is a flexible process which is to form the sheet point by point on nc forming machine according to the prepared program.
板料零件数控渐进成形工艺是一种通过数字控制设备，采用预先编制好的控制程序逐点成形板料零件的柔性加工工艺。
STEP-NC relates design information and manufacturing information of the products in the form of oriented object, dispels the information flow bottleneck between CAX and CNC.
NC以面向对象的形式将产品的设计信息与制造信息联系起来，消除CAX 与CNC之间的信息流瓶颈。
Studios, in effect, control the movie ratings board and endlessly lobby it not to label extreme violence with an NC-17, the only form of rating that is actually enforced.
制片厂实际上控制了电影级别评定委员会，并且永无止境地对其进行游说，以便不把那些充满极度恐怖的影片评为NC - 17级，级别评定的唯一形式实际上是强制性的。
To aim at the research on cutting direction in NC machining of free-form surfaces, a simplified time model for tool trace is established, and the system of tool path programming is discussed.
针对自由曲面走刀方向数控加工的研究，建立了简化的刀具轨迹时间模型，并对路径规划的系统进行了讨论。
Moreover, the system could quickly, directly and accurately generate not only the detailed drawing of high precision form tools, but also the NC program.
借助该系统可直接快速、准确地生成高精度成形车刀工作图，以及成形车刀的数控加工程序。
The form design of NC Machine Tools is a complicated work that comprehends the knowledge of aesthetics, ergonomics and product structure.
数控机床造型设计是一项综合了美学知识、人机工程知识和产品结构知识的复杂的设计活动。
The step error and line error of free-form surface of projecting NC machining were analyzed.
分析了自由曲面三坐标投影法数控加工的步长误差和行距误差。
A design model of NC code complier based on ANother Tool for Language Recognition (ANTLR) was presented, which adopted the Extended Backus Naur Form (EBNF) to define the NC program syntax rule.
采用了扩展的巴科斯范式(EBNF)定义NC程序语法规则，提出了一种基于语言识别工具(ANTLR)的NC代码编译器的设计模型。
Method Plasma concentrations of 9-nc lactone form (lactone 9-nc) and the total of lactone and carboxylate forms (total 9-nc) were determined by the validated HPLC method.
方法：采用hplc法测定大鼠尾静脉注射给药后不同时间点9 - NC的内酯型浓度和总浓度并进行药物动力学拟合。
This paper presents a new discrete model of NC path generation for free form surface machining.
提出一个面向曲面nc加工刀位计算的曲面离散基本单元模型及其误差控制方法。
A new algorithm of automatic generation of interference free cutter location path for nc machining of free form surfaces with flat end cutters is proposed.
提出了一种新的曲面平头立铣刀加工无干涉刀位轨迹自动生成的算法。
Basic theory and procedure of NC machining for free-form surface based on reverse engineering were introduced. Digital measure and CAD modeling as well as tool path generating were analyzed.
介绍了以反求工程为技术支撑的自由曲面数控加工的基本原理和全过程，并对其中的数字化扫描、CAD建模及刀具轨迹生成等关键技术作了进一步的分析。
A novel method is proposed to calculate the minimum distance from tool to free-form surface, to solve tool interference problem in 5-axis nc sculptured surface machining.
提出了一种求解曲面到刀具极值距离的方法，以解决曲面5轴数控加工中刀具与曲面的干涉问题。
The concrete content involves: construction of the case-base that comprises 2000 cases of NC machine tools form design, and putting forward a further standardized case description mode;
具体研究包括：构建了以2000个数控机床造型设计案例为基础的案例库，并提出了规范的案例描述模式；
Various NC programs to machine sphericity thread form based on ellipse contour are developed using macro programs. This method can be used for the contour machining of all types of conic.
举例编制了椭圆轮廓上球形螺纹的宏加工程序，此方法适用于所有二次曲线的球形螺纹加工。
Aiming at the global collision detection in 5-axis NC machining free-form surfaces, it proposes a new method to primarily detect collision real-timed.
针对五轴数控加工复杂曲面的全局干涉问题，提出了一种实时干涉初步检测算法。
On the basis of the differential geometry, the geometrical theory of machining free form surface by cylindrical cutter in 5-axis NC machine tool is investigated.
从微分几何学的角度，探讨了在五坐标数控机床上采用圆柱形刀具线接触加工自由曲面的几何学原理，分析了刀具面与被加工曲面二阶密切的条件。
On the basis of the differential geometry, the geometrical theory of machining free form surface by cylindrical cutter in 5-axis NC machine tool is investigated.
从微分几何学的角度，探讨了在五坐标数控机床上采用圆柱形刀具线接触加工自由曲面的几何学原理，分析了刀具面与被加工曲面二阶密切的条件。
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