FIVE-AXIS MACHINING
Software Functionality is Enhanced in Advanced CNC The Okuma OSP CNC control offers a full suite of fi ve-axis functionality which has been enhanced with 3D cutter comp and tool center point control, according to Wade Anderson, product specialist sales manager, Okuma America Corp. (Char- lotte, NC). “The transition to fi ve-axis is a natural sequence as shops become comfortable adding a rotary table to a small three-axis vertical mill for the fourth axis, and then another ro- tary for the fi fth axis. Five-axis machining provides the ability to
Okuma doesn’t offer scaled-down versions of its OSP CNC control. “We offer only one control that is used on our machines, we don’t have a scaled down version that limits you to four axis or 4+1. Our MU series of fi ve-axis machinining centers, with pallet sizes ranging from 400 to 1000 mm,” said Anderson, “are all full fi ve-axis contouring OSP-P300S that has the functionalities of tool center point control and 3D manual feed mode. The control allows capabiliites of programming the part through CAM systems by putting in vectors instead of rotary axes. The part can be moved from one trunnion-style Okuma machine to an Okuma with a B axis on the spindle and C on the table without reposting the part program. In the same way using the tool center point fucntion, the part can be taken off the table and put back on to fi nd the zero point on the part again from where the center line of the rotaries are and then offset the tool center point control without reposting,” said Anderson.
Greg Hyatt, chief technology offi cer (right), and an attendee at DMG MORI’s Technology Days view the inner additive/subtractive workings of the Laser- tec 65 3D hybrid machine. Additive manufacturing, a.k.a. 3D printing, was the focal point of a panel discussion on its potential. Panelists agreed that there are no limits in the sky (jet engines/rocket motors) or deep under- ground (energy drilling/mining) for the hybrid technology in producing new products or repairing high value existing ones like turbine blades.
get to fi ve sides of a part and opens a lot of possibilities on how parts are processed, doing more work with less handling.” Depending on the type of work that is done, fi xturing for
fi ve-axis machining can be simple. “We do a lot of dovetail chucks where you have to cut the part to have a dovetail machined into it and then you grab that dovetail and that’s what you’re holding on to,” said Anderson. Okuma’s new MU series of full fi ve-axis machines, such as the MU-6300V and MU-8000V, utilizes a unique trunnion positioning on its fi ve-axis machines that places it 90° from traditional machine setups. “There are two benefi ts,” said Anderson. “A pallet changer can come out of the back of the machine, eliminating interference with operator setup and access to the front door and controls. Another benefi t is that negative machining angles are possible without a long spindle overhang,” said Anderson.
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AdvancedManufacturing.org | July 2015
Two Mills In Unique Bridge-Style Combination For machining composites and other aero- space materials, the P5 bridge-style fi ve-axis mill from Bertsche Engineering Corp. (Buffalo Grove, IL) features a unique confi guration in which two machining modules are hung on opposite sides of the bridge. Being on the opposite sides of the same bridge allows two different parts to be simultane- ously machined at the same time. To increase production capability the P5x5 machine features the two independent P5 mills packaged into the space of one P5 mill, essentially doubling the capacity per square foot of fl oor space occupied to meet production rates for the customer. The P5x5 mill confi guration has two completely indepen-
dent fi ve-axis (X-axis table and four axis on bridge) modules working in parallel with each other either making the same but more typically different parts. Each side runs its own program, has its own dedicated toolchanger, spindle probe, laser toolsetter, fl ood-coolant controls, machining compart- ment, auto part load door etc. Two CNCs, one controlling A side and one controlling
B side, operate the machine in one of three modes: A only mode; B only mode; and A&B mode. The two CNCs share information but either side runs independent of the other. One side can be serviced while the other side is machining parts. This allows production to continue even during PM periods.
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