Second, sequence of operation
1) clicks on Edge in the CAM design pattern the main menu "the document" under "the insertion document", inducts leaf blade's three-dimensional model to Edge in the CAM environment, simultaneously increases the engine bed jig, observes the interference whether occurs. The attention this time CPL plane choice, the Z axis is vertical with the platen, like chart 2 shows.

Chart 2 leaf blade's clamps the situation under Edge CAM attire
2) acts according to the actual situation increase processing semifinished materials (chart 3), the semifinished materials three-dimensional model insertion, or clicks on the main menu "the modelling" under "the semifinished materials/jig", an automatic selection cube (attention clicks on semifinished materials after the leaf blade curved surface partial semifinished materials which determination selector vane entity can produce may use).

Chart 3 semifinished materials modelling
3) enters under the processing pattern, chooses the cutting tool, like chart 4 chooses T three edges milling cutters, pays attention in "are more" under fills in the cutting tool to be able to carry on the distance which the bottom cuts (like chart 5, will not have this data, system not to be able to carry on bottom to cut computation), according to actual size disposition cutting tool and its in numerical control engine bed position.

Chart 4 cutting tool parameter input

Chart 5 the cutting tool bottom cuts is away from the parameter

4) clicks on the main menu "铣削 the processing" under "the outline mill", enters "the outline mill" the parameter establishment environment. The attention (or entity) and the bottom cuts the curved surface processing the function to select (chart 6, only had has chosen T three edges milling cutters or outside raised ball knife this talent is activated). According to leaf blade Z to the size separately establishes approaches the plane, the datum plane and the depth of cut.

Chart 6 outline mill parameter establishment

5) after the parameter establishment completes clicks on the determination, then single-clicks the mouse left key selector vane curved surface in the graph work area, clicks on the right key choice conclusion. Cutting tool way automatic production (chart 7).

Chart 7 cutting tool way chart

Chart 8 simulation processing situation
6) clicks enters the simulation environment, observes components effect which the actual 走刀 situation and processes (chart 8).
7) clicks on the production numerical control code, spreads to the engine bed to carry on the actual processing.
Three and multiple spindle processing comparison
This processing method and the common 5 axes linkage or four axes linkages processing method compares, has respective good and bad points, under we compare.
First, the bottom cuts the way processing quite to be high to the cutting tool request, in the ordinary circumstances may select three edges the end mills, the counter- 锥度 knife perhaps the round head end mill (stick 棒糖 -like big end 球刀); The goal was gives way to traffic has processed 型面; But uses the multiple spindle processing, may use an ordinary ball knife. In comparison, the cutting tool cost comparison is high.

Next, quite is been big the components shape influence; The leaf blade distortion angle not suitable too is big, is processed the leaf blade highly also to receive the cutting tool the length limit.
When, programming quite is high to the software environment request, is not all software all may complete this kind of processing.
The bottom cuts above the processing although has some limitations, but, in actual production, also may bring some unexpected advantage to us. First it has solved a three coordinates processings 闭角 型面 craft problem, this kind of question not only limits the leaf blade processing which narrates in above, many similar three coordinates are unable processes has 闭角 型面 all to be allowed to use this method processing. This method effectively uses the existing three coordinates equipment to process the components which the multi- coordinates equipment can process, although cutting tool cost relative higher, but compares newly purchases a multiple spindle linkage the equipment to say has saved very many funds, moreover is very quick can see the benefit; Next, the processing 型面 quality definitely may compare favorably with with the multiple spindle processing. Under the multiple spindle processing processing condition, generally is chooses the method processing which the ball knife line cuts, after the cutting tool and the processing forms is processed the surface to belong the contact type; But the bottom cuts the processing method, so long as cutting tool choice appropriate, after the cutting tool and the processing forms is processed the surface also to belong the contact type, therefore, the surface quality basic is same. In addition looked from the processing efficiency, because this kind of processing cutting tool diameter generally quite big (if cutting tool diameter is small, affects bottom to cut distance;) In under the condition permission premise, may arrive by a processing, does not need to carry on the rough machining, therefore has saved the process period.
Four concluding remark
This article through uses in EdgeCAM one kind of outline mill function, has solved a kind of impeller blade's three axle 铣削 problem. At the same time, has regarding other some 闭角 型面 also may use the similar processing method, thus expanded three coordinates numerical controls equipment application domain and the category, enhances this kind of equipment the use value.