CNC machining centers are primarily used for processing key mold components such as mold kernels and inserts, as well as copper pins. The quality of the mold core and inserts directly determines the quality of the formed part of the mold. What should be paid attention to when CNC machining aluminum alloy cavities in normal production?

1. Precautions for front mold processing

① Knife path order: the large knife surface groove cutting path is rough, the small knife contour contour cutting path is rough, the large knife (ball cutter) parallel milling cutter path is smooth, the small knife parallel milling cutter path is smooth. During the production of the front mold, there is usually a matching copper tool, mainly with a rough cutting path, supplemented by a local curved smooth knife.

② With a parting surface and a pillow surface, it is necessary to add time together. The parting surface and pillow surface should be machined in place without leaving any margin, and the cavity should have a margin of 0.2-0.5 for sparking. If there is only a young male, leave a margin of 0.3. Both coarse and young males can have a margin of 0.5. The front mold can have a margin of 0.1 at the collision and friction positions, which is used for front and rear mold matching.

③ When cutting, use a large diameter round nose knife (handle), and when the diameter of the knife is too small, it can easily break and bounce the knife. Try to use it when cutting.

④ The tool path size in surface machining is calculated based on the movement trajectory of the tool center axis, that is, the actual machining area is one tool radius value larger than the selected tool path size constraint box on one side. Therefore, it is necessary to set the tool path size constraint box parameters reasonably. Avoid processing scale exceeding practical processing needs.

⑤ The front mold data is relatively hard, so it is necessary to carefully check before processing to reduce errors and avoid easy soldering!

2. Precautions for rear mold processing

① Rear mold cutter path sequence: large cutter surface grooving cutter path is rough, small cutter constraint scale surface grooving cutter path is rough, corner cleaning, large cutter (ball cutter) parallel milling cutter path is smooth, small cutter (ball cutter) parallel milling cutter path constraint scale is corner cleaning, smooth cutter, flat cutter, and other high profile cutter paths are corner cleaning.

② The rear mold uses the same information as the front mold, and try to use a round nose knife (handle) for processing.