Experiment results showed that the fracture of the nut was originated from a variety of macro defects, micro defects both by founding and machining, as well as high residual stress.
结果表明，螺母存在多种铸造及加工的宏观、微观观察缺陷和残余应力过高是螺母断裂失效的原因。
Finishing machining and rough machining for numeric control turning ellipse curve are investigated through four arc approximation method and the macro program method.
从四弧逼近法和宏程序编程方法两方面对数控车削椭圆曲线的精加工和粗加工进行了探讨。
The design of helical milling holes progams, using macro commands, give full play to the machining center, high-quality, high-precision processing capacity.
设计的螺旋方式铣孔程序，利用宏程序指令，充分发挥了加工中心的高质量、高精度加工能力。
Various numerical control programs for rough profile machining and finish profile machining are developed using macro programs. This method can be used for the contour of all types of conic.
根据粗、精加工的不同情况，举例编制了相对应的数控加工程序，此方法适用于所有二次曲线的仿形加工。
With the theory, a piece of CNC codes for machining a sample cone surface is programmed based on NC macro instructor function of FANUC-0MD CNC system. , which is much efficient and universal.
基于FANUC-0 MD系统的宏指令功能，运用该原理编写了一模具锥面的数控加工程序，实例应用表明这种编程方法不仅减轻了规则曲面手工编程的困难，而且使曲面加工质量更加容易保证。
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。
On the basis of putting forward a new method of calculating joint, programming NC code adopting macro processor and subprogram, machining surface of part by means of row cutting.
在此基础上利用宏子程序进行数控编程，采用行切法切削加工。该方法简便易行，且能保证零件的表面粗糙度和加工精度。
On the basis of putting forward a new method of calculating joint, programming NC code adopting macro processor and subprogram, machining surface of part by means of row cutting.
在此基础上利用宏子程序进行数控编程，采用行切法切削加工。该方法简便易行，且能保证零件的表面粗糙度和加工精度。
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