Milling plane cam parts

Example: Milling machining plane cam parts (below), CNC milling machine model XK5040, CNC system Fanuc 0M-C.
Requirements: Process analysis of the workpiece to determine the workpiece clamping program processing sequence and feed routing cutting tool selection cutting amount
1. Process analysis of the workpiece
As shown in the figure below, the cam profile consists of arcs BC, CD, DE, FA and lines AB and EF. The workpiece material is aluminum and it is relatively easy to cut and machine. The workpiece has been machined with both ends of the hole and the hole Ï†12H7 before the milling process, and the bottom surface A and the hole Ï†12H7 axis are set as the positioning reference. It is required that the A plane be perpendicular to the axis of the spindle of the milling machine, and the hole Ï†12H7 should be parallel to the axis of the spindle of the milling machine, so as to ensure the verticality of the cam groove contour facing the A plane and the dimensional and positional accuracy during machining.

Flat cam part drawing
2. Workpiece clamping scheme
Because the part is a small cam, it is better to use the mandrel to position and tighten the bolts. Set the intersection of the workpiece top surface and the hole Ï†12H7 axis as the origin of the workpiece coordinate system.
3. Processing sequence and feeding route
The processing path of this cam includes depth cutting feed and plane cutting. When the tool reaches a specified depth during cutting, the tool moves in the XY plane to mill the cam profile.
4. Select tool and cutting amount
1) Select cutting tool
The milling cutters and tool materials are mainly selected based on the machinability of the part material, the geometry of the workpiece surface, and the size of the workpiece. Since the part material is aluminum, the machining performance is good. The integrated JT-MW tooling system can be used and the Ï†10mm carbide keyway cutter can be selected.
2) Select cutting amount
According to the cutting performance of the aluminum material of the parts, the characteristics of the carbide cutting tool materials and the machining accuracy requirements determine the cutting amount. Cam groove depth 8mm, divided into 2 cutting. The depth of the groove is set to 1 mm for finishing allowance, leaving 1 mm of allowance on both sides of the cam; the cutting speed and feed rate should be selected taking into account the efficiency and life of the tool. The spindle speed is 500 r/min during roughing. The speed is 50mm/min. Before finishing, the part geometry is checked. The offset of the tool length and tool radius is determined based on the test result. The spindle speed is 1000r/min for the finish milling, and the feed rate for the milling cutter is 25mm/min. The dimensional accuracy and surface quality meet the processing requirements of the drawings.
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