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Precautions for Processing Aluminum Alloy Cavities

2021-11-20
Precautions for processing aluminum alloy cavities
The CNC machining center is mainly used for the processing of key mold parts such as mold cores, inserts, and copper males. The quality of the mold core and inserts directly determines the quality of the molded part of the mold.
1. Precautions for front mold processing
① Tool path sequence: broad knife curved surface grooving tool path coarse, small knife contour contour tool path coarse, broad tool (ball cutter) parallel milling tool path light tool, small tool parallel milling tool path light tool. When the front mold is manufactured, there is usually a matching copper male, which is mainly used for roughing toolpaths, supplemented by partial curved light knife.
②With parting surface and pillow surface, it is necessary to add time together, the pillow surface of the parting surface is processed in place, leaving no margin, and leaving a margin of 0.2-0.5 in the cavity for sparking. If there is only a young man, leave a margin of 0.3. When there are both thick and young men, the margin can be 0.5. The margin of 0.1 for the front mold and the rubbing position can be reserved for the front and rear mold matching.
③Use a large-diameter round nose knife (knife handle) when opening thick. If the diameter of the tool is too small, it is easy to break and snap off the knife. Try to use it when the knife is in the middle.
④The tool path range in curved surface processing is calculated based on the movement track of the tool center axis, that is, the actual machining area is one side larger than the selected tool path range limit box by a tool radius value. The tool path range limit box parameters should be set reasonably to avoid machining The range exceeds the actual processing needs.
⑤The front mold material is hard, so it should be carefully checked before processing to reduce errors and cannot be easily welded.
2. Precautions for post-mold processing
①Sequence of back mold toolpath: rough surface grooving toolpath for big knife, limit range of small tool for rough groove grooving, clear corner, big knife (ball knife) parallel milling tool path smooth, small knife (ball knife) parallel milling toolpath restriction The range of clear corners, smooth knife, flat knife and other high profile tool path clear corners.
②The material used for the back mold is the same as that of the front mold.
Precision Grinding of Aluminum Alloy