Matters needing attention before CNC machining
① Cutter path sequence: large cutter curved surface grooving cutter path opening, small cutter contour contour cutter opening rough, large cutter (ball cutter) parallel milling cutter path smooth cutter, small cutter parallel milling cutter path smooth cutter. When the front die is manufactured, there is usually a matching copper male, mainly with a rough cutting path, supplemented by a local curved surface smooth knife.
② With parting surface and pillow surface, it is necessary to add time together. The parting surface pillow surface shall be machined in place without allowance, and the allowance of 0.2-0.5 shall be reserved at the cavity for spark. If only the young male is needed, a margin of 0.3 can be left. The allowance is 0.5. The allowance of 0.1 can be reserved at the position of collision and wear of front die, which is used for front and rear die matching.
③ When the diameter is too small, it is easy to break and snap the knife. It should also be selected as far as possible.
CNC machining
④ The tool path size in curved surface machining is calculated according to the moving track of the tool center axis, that is, the actual machining area is one more tool radius value than the one side of the selected tool path size constraint box, so the parameters of tool path size constraint frame should be set reasonably. To prevent the processing scale beyond the practical processing needs.
⑤ The data of the front die is hard. Check carefully before processing to reduce mistakes and not easy to weld!
Precautions after CNC machining
① Sequence of tool path of back die: large tool surface grooving, cutter path opening, small tool constraint scale, curved surface grooving and opening, angle cleaning, large cutter (ball cutter) parallel milling path smooth surface, small cutter (ball cutter) parallel milling path constraint scale, angle cleaning, smooth cutter, flat cutter and other high profile tool path angle cleaning.
② The data of the back die is the same as that of the front die, and the round nose knife (handle) should be used as far as possible.
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