When milling complex workpieces in milling machining center(2)

3. The end of the end mill cutting edge

And other artifacts in the mold cavity CNC milling, cutting point when the concave portion or deep cavities, need longer end mill protrusion amount. If using a long blade-type mills, due to the large deflection of the tool, the tool is easy to produce vibration and cause breakage. Thus in the process, if only around the end of the tool cutting edge to participate, it is best to choose a longer total length Duanren tool shank type cutter. When using large-diameter end mill machining a workpiece on a horizontal CNC machine tools, deformation due to the weight of the tool to produce larger, more should pay attention to the topic very easily end cutting edge appears. In case you must use the long edge milling cutter type, we need to significantly reduce the cutting speed and feed rate.

4. Selection of cutting parameters

Cutting speed depends on the choice of secondary material workpiece feed rate depends on the choice of secondary material and milling cutter diameter workpiece. Some foreign manufacturers of cutting tools with cutting tool parameters tool sample selection table, for reference. But at the same time cutting parameters chosen by the machine, tool systems, is affected workpiece clamping appearance and manner, and many other factors, should be adjusted cutting speed and feed rate according to the actual situation.

When life gives priority to the tool elements may be appropriate to reduce the cutting speed and feed rate when the chips away from the edge of the case is not good, may be appropriate to increase the cutting speed.

5. Select the cutting mode

Climb use helps prevent blade damage, can improve tool life. But there are two points need to pay attention:

① as ordinary machining, should the idea to eliminate the gap feed mechanism

② when the workpiece surface residual casting, forging process consisting of an oxide film or other hardened layer, should adopt the milling.

6. The application of carbide end mills

High-speed steel milling cutter have wider application ranges and loss requirements, it will not cause big problems even the improper cutting condition adopoted. While, for carbide end mills, having good wear resistance in high-speed cutting, it requires stricter cutting condition and narrow application range.

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