| 摘要 |
PURPOSE: Routers, and more especially routers having high-metal removal capability is provided to manufacture integral skeletal frames for aircraft components from plates or slabs of aluminum alloy by milling. CONSTITUTION: A high-speed end-milling router(10) for raping entry into a workpiece has plate-like hard metal cutting inserts(28) fitted in pockets(30) milled in chip gullet surfaces(24) to present the insert at a desired axial rake angle and with radially inwardly and outwardly facing cutting edges(34,36,38,40). Each insert is secured in its pocket by two countersink headed machine screws(43) whose holding power against centrifugal dislodgement of the insert is reinforced by a projection(46) from the seating surface of the pocket extending into a blind recess(44) molded in the undersurface of the insert. |
