This article describes three algorithms for distance field generation on triangulated model: brute force algorithm, single-threaded algorithm based on spatial partition and multi-threaded algorithm based on spatial pa...This article describes three algorithms for distance field generation on triangulated model: brute force algorithm, single-threaded algorithm based on spatial partition and multi-threaded algorithm based on spatial partition. Spatial partition algorithm use equidistant network divide the bounding box into equal-sized cubes, calculates the maximum and minimum distances between the sample point and each of the small cubes,taking the minimum value from the maximum distance as the minimum distance from the sample point to the model named d1, comparing d1 with the distance from sample point to every little cube's minimum distance d2, if d1 <d2, the sample point's distance to all triangles inside this cube are greater than d1, skip this cube, otherwise, calculated the distance from the point to all the triangles intersect with the cube, then alternative d1 with the minimum value, circulate all small cubes intersect with the model. Comparing the calculation results, it can be seen that the algorithm about the multi-threaded distance field relative to the other two algorithms in computational speed is greatly improved especially for complex models.展开更多
宏程序是数控系统提供给客户的一种类似于高级语言的编程方式,含有逻辑运算、算术运算和函数等混合功能,通过更改同一程序的参数设置,可实现多种相似工件的精确加工;而梯形螺纹是工程中应用广泛的结合形式,用于传递力和运动。由于螺纹...宏程序是数控系统提供给客户的一种类似于高级语言的编程方式,含有逻辑运算、算术运算和函数等混合功能,通过更改同一程序的参数设置,可实现多种相似工件的精确加工;而梯形螺纹是工程中应用广泛的结合形式,用于传递力和运动。由于螺纹刀牙形角小、刀具强度弱,易引起刀具三刃振动切削而严重影响精度,使得梯形螺纹在传统加工中是一个难点。本文基于FANUC Series Oi mate-TC数控系统,从梯形螺纹加工方法分析、工艺设计和程序编制等方面对梯形螺纹的数控车削方法进行探讨。展开更多
文摘This article describes three algorithms for distance field generation on triangulated model: brute force algorithm, single-threaded algorithm based on spatial partition and multi-threaded algorithm based on spatial partition. Spatial partition algorithm use equidistant network divide the bounding box into equal-sized cubes, calculates the maximum and minimum distances between the sample point and each of the small cubes,taking the minimum value from the maximum distance as the minimum distance from the sample point to the model named d1, comparing d1 with the distance from sample point to every little cube's minimum distance d2, if d1 <d2, the sample point's distance to all triangles inside this cube are greater than d1, skip this cube, otherwise, calculated the distance from the point to all the triangles intersect with the cube, then alternative d1 with the minimum value, circulate all small cubes intersect with the model. Comparing the calculation results, it can be seen that the algorithm about the multi-threaded distance field relative to the other two algorithms in computational speed is greatly improved especially for complex models.
文摘宏程序是数控系统提供给客户的一种类似于高级语言的编程方式,含有逻辑运算、算术运算和函数等混合功能,通过更改同一程序的参数设置,可实现多种相似工件的精确加工;而梯形螺纹是工程中应用广泛的结合形式,用于传递力和运动。由于螺纹刀牙形角小、刀具强度弱,易引起刀具三刃振动切削而严重影响精度,使得梯形螺纹在传统加工中是一个难点。本文基于FANUC Series Oi mate-TC数控系统,从梯形螺纹加工方法分析、工艺设计和程序编制等方面对梯形螺纹的数控车削方法进行探讨。
