在ug中,残料开粗我们一般有三种方法（InUG,remainedroughwegeneral..

在ug中,残料开粗我们一般有三种方法（In UG, remained rough we generally have three kinds of methods）
In UG, remained rough we generally have three kinds of methods:
1. reference cutters
2. application IPW
3. use layer based functionality
I. reference tool:
The tool is usually used to refer to the tool first rough machining of parts, the use of reference tool two times thick, the system will calculate the remaining reference tool specified for cutting the material, and then the rest of the material as defined in the current operation of the cutting area. Using a reference tool for two times roughing, similar to other "cavity milling", but it is limited to cutting in the corner area. When using a reference tool for two turns, the reference tool must be larger than the diameter of the tool in use.
A. Good points:
1. fast calculation. The use of reference tools two times to open coarse ratio, with IWP or 3D for two times to open rough calculation, fast, less memory.
2., there is no dependence. Use the reference tool two times to open the rough, do not need and rough processing in the same
program male parent group, do not need to define the geometry male parent group. No relevance, easy to edit and modify cutting parameters.
3., the calculated knife rail ratio is refreshing.
B. disadvantages:
1. will not consider the narrow one step in the processing of coarse materials.
For example, we use spiral knife in the more narrow place, often have to set the minimum coil diameter, so the narrow place is not to go, leaving the remainder. If there is danger of reference tool, on the knife, because the reference tool will not take into account the spiral sword to scrap.
C. uses the reference tool two times to open the roughing technique:
1., you can choose a larger than roughing tool. Hypothetical reference tool is tool calculating system, select the reference tool, the tool can choose appropriate higher than the actual rough machining, such processing safety, easy cutting tool in small angle, can guarantee two times rough smoothly.
2., you can choose greater processing tolerances than rough machining. Using the reference tool two times to open rough, you can choose more than the previous rough machining tolerances, you can reduce the number of empty knives.
3., the correct set of "minimum material thickness", set a smaller material thickness, you can reduce the number of empty knives, speed up two times to open thick.
Two. Use layer based process model IPW two times to open rough
A. advantages:
1., a layer based process model, IPW, can efficiently cut the corners and stepped surfaces left in previous operations.
2. the process model based on layer IPW, when processing simple components, the tool track processing time is significantly reduced compared with the 3D process model, and the time required to process large complex parts is greatly reduced.
3., you can use larger tools in rough machining to complete deep cutting, and then perform the same tool in subsequent operations to complete very shallow cutting to clear the stepped surface.
The 4. cutter path is more regular than the 3D process model IPW.
5., you can combine a number of rough machining operations to allow roughing and two roughing of a given cavity to further automate the process.
B. disadvantages:
1. calculate the rail time faster than the reference knife,
slower than the 3D.
Two
Compared with 3D, the reference object of the two algorithms is different: the layer IPW is the 2D margin, and the 3D is the 3D margin.
C. notes:
1., the use of process model IPW must not be placed under the NONE program parent group, requiring special attention. Because in the "visual" and "cavity milling" in the NONE program group in the parent body will be ignored, so if you try an operation in the NONE parent group in the new tool path generation, and set up a "process model" option, according to the rough geometry input "process model" use the original definition, so the operation is still rough, but not two times rough.
2. when working model IPW must be placed in the same male parent group as rough processing. The system will generate a small flat body based on the previous tool path, and the current operation will take this micro plane as a blank for two times.
3. when using the process model IPW, you must use smaller tolerance values. The tool used should be less than or equal to the roughing tool.
D. uses the process model IPW to perform two roughing techniques:
1. using and displaying the 3D process model requires a large amount of memory to create the Xiaoping surface. To reduce memory usage and reuse Xiaoping surfaces, you can step down to create the 3D process model IWP and save it in separate component files. Right after the rough machining tool path generation, path selection simulation --Generate IPW option is set to "good" -- to save IWP as a first component complex, 2D path simulation is created, you can create a "process model" Xiaoping surface, then will create a small plane to save the corresponding layer. When needed, the "three dimensional process model" and Xiaoping face can be used as blank to carry out "cavity milling" and finish two times of roughing. This saves memory, since the small plane model does not continue to reside in memory after use, and can be reused as long as the operation is up to date. Through this method, two times of roughing, no dependence on rough machining, relatively independent, easy to modify.
2., the correct set of "minimum material thickness", set a smaller material thickness, you can reduce the number of empty knives, speed up two times to open thick.
Three. Use 3D process model IPW two times to open rough
A. advantages:
1., the 3D process model is used as the billet geometry in the cavity milling process to process an area according to the current state of the actual workpiece. This will avoid cutting the machined area again.
2. displays the previous 3D, process model, and generated 3D process model in the actions dialog box"
3. using 3D IPW process model of a crude tool without fear of overload, don't worry about where no clear, do not consider what remained too much by a process, without considering the definition of blank.
B. disadvantages:
1. use 3D process model IPW two times to open rough calculation long time and may produce more empty knife. The operation must be recalculated at the same time that there is a correlation between the upper process and the change of the previous process.
Brief summary:
1. using the two cutting off of the reference tool is limited to the cutting of the corner area of the remaining material,
The calculation speed is quick, and the two roughing is efficient
2. and the use of steps of model using IPW and 3D process model and IPW two based on the rough, rough machining residual material as blank two rough, coarse margin evenly after the opening, but the computing time is long, the processing efficiency compared with the reference tool two times lower crude.
3., the specific increase in which to adopt, two times to open rough, according to the complexity of the parts, the level of fine machining requirements, flexible use.。