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Compact High-Speed VMC and Hybrid Machining/Grinding Center

Mitsui Seiki Vertex 100 5-axis VMC

Mitsui Seiki Vertex Hybrid G VMC/grinding center grinding tools

Mitsui Seiki will display its new Vertex 100 5-axis vertical machining center (VMC) and demonstrate the broad capabilities of a new family of Vertex 5-axis hybrid vertical machining/grinding centers.

Vertex 100 5-Axis VMC

The Vertex 100 5-axis VMC is a compact, high-speed machine capable of high-precision milling of larger parts such as blisks for aircraft engines. The Vertex 100 can machine workpieces 1,250 mm in diameter and 850 mm tall while occupying only 3 m x 4.2 m of shop floor space. XYZ axis strokes are 1,000 mm, 900 mm and 750 mm. Maximum swing diameter is 1,480 mm.

From CAT 40 to HSK-A100 taper sizes, the Vertex 100 is supplied with multiple spindle options (15,000 RPM, 25,000 RPM and 30,000 RPM). A large 60-tool standard automatic tool changer handles maximum tool lengths of 300 mm and maximum tool diameters of 125 mm (CAT 40/HSK A 63) or 160 mm (CAT 50/HSK A 100), for flexibility in job shop applications. Larger capacity tool changers are an additional option.

The machine's tilt/rotary table, designed and built by Mitsui Seiki and supported by a rigid cast iron base, provides high precision and rotation speed up to 100 RPM. The table's C-axis motors are direct drive while the A-axis has tandem direct drive motors. The machine is capable of workpieces up to 1,250 mm (49.25") diameter.

The X- and Z-axes of the Vertex 100 are driven by single ball screws, with dual ball screws on the Y-axis. The linear axes are capable of fast, 1-G acceleration and deceleration. The machine's FANUC control features a state-of-the-art 375 mm (14.75") LCD HMI.

The Vertex 100 offers features designed to provide accuracy and consistency. The machine features a proprietary cast iron bed and a solid box-in-box design for enhanced rigidity, stiffness and agility. The innovative machine geometry results in positioning accuracy in the X-, Y- and Z-axes of 0.001 mm (0.000040"), ±6 arc seconds in A-axis and ±4 arc seconds in the C-axis.

Hand-scraped guideways maximize precision. An advanced thermal compensation system provides size consistency, and glass scales provide minimum resolution of 0.001 mm.

Vertex Hybrid G 5-Axis

The Vertex Hybrid G 55-5X/75-5X/100-5X machines provide CMM-level precision in critical high-speed milling and grinding applications such as lights-out machining of die and mold, optical and tooling components. The machines are capable of 0.0003" (7.5 µm) or better precision in 3+2 or fully simultaneous 5-axis machining, carrying out high speed milling and grinding via a 25,000 RPM main spindle and ATC changeable air spindles of 40,000 to 90,000 RPM capacity.

The new machines take advantage of Mitsui Seiki's engineered accuracy and rigidity to allow volumetric calibration according to ISO10320-2 using the latest FANUC 3-D volumetric compensation features, and enable use of in-process 3-D (NIST) traceable measuring capability. A part spinning process produces tangential planetary work spindle alignment, emulating the U-axis motion of jig grinding equipment. The machines can employ trochoidal dynamic power or high-speed cutting strategies up to 90,000 RPM.

Key features include automatic in-process grinding wheel dressing and size measurement and wheel calibration. AE sensors and software guided application strategies monitor milling and grinding process finishes.

Vertex machines feature proprietary cast iron beds and a solid box-in-box design that provide enhanced rigidity, stiffness and agility. Innovative machine geometry results in positioning accuracy in the X-, Y- and Z-axes of 0.001 mm (0.000040"), ±6 arc seconds in A-axis and ±4 arc seconds in the C-axis.

Hand-scraped guideways maximize precision. An advanced thermal compensation system assures size consistency, and glass scales provide minimum resolution of 0.001 mm.

Mitsui Seiki will demonstrate the machines' capabilities with a combination of milling and grinding operations on a D2 steel plate, hardened and heat-treated to 60-62 HRC. A form milling tool will rough and pre-finish corner relief, followed by a form-grinding wheel for finishing. After a rounded triangular pocket is milled in the part's center, a variety of grinding wheels will form critical step features.

For more information contact:

Mitsui Seiki USA Inc.

563 Commerce Street

Franklin Lakes, NJ 07417


IMTS 2018 Level 3, Booth S-338519

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