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Jig Milling Accuracy with Machining Center Productivity



Mitsui Seiki has launched a new series of CNC vertical machining centers (VMCs), called the J Series (for "Jig"), which are suitable for machining medical, optical, mold and die and aerospace parts.

The line provides positioning accuracy and repeatability of +/-1µm. A thermal compensation system employs sensors on the machine faceplate and inside the spindle to minimize the effects of temperature changes on part accuracy and cut temperature-generated displacement by 60%. This system also reduces Z-axis thermal growth and deflection by 30%. Cooling systems for slide way lubrication and ball screw cores stabilize axis feed precision.

Mechanical design features that maximize machine rigidity and accuracy include hardened and ground tool steel box slideways as well as contact elements that enhance acceleration, reduce stick-slip and allow for feed accuracy of 0.1 µm. "Another proprietary engineering detail improves the static rigidity of the Z-axis to more than six times that of conventional Z-axis arrangements," said a spokesperson.

These heavy-duty precision machines allow for more complete machining of precision components including precision boring, milling, drilling and tapping. "The solution offers machining center technology and jig borer precision in one machine," said the spokesperson.

The line includes four basic machines to satisfy a broad range of workpieces:

  • PJ812 (PJ for "Profile Jig"): XYZ travels 1,200 mm, 800 mm, 500 mm; max. work size 1,200 mm x 800 mm; table load 1,500 kg.; ATC 60, 90, 120 tools. Spindles are offered from 10,000 RPM to 30,000 RPM.
  • J1220: XYZ travels 2,000 mm, 1,250 mm, 500 mm; max. work size 2,200 mm x 1,500 mm; table load 3,000 kg (4,000 kg opt.); ATC 60, 90, 120 tools. Spindles are offered from 10,000 RPM to 15,000 RPM.
  • J1230: XYZ travels 3,000 mm, 1,250 mm, 500 mm; max. work size 3,000 mm x 1,500 mm; table load 3,000 kg (4,000 kg opt.); ATC 60, 90, 120 tools. Spindles are offered from 10,000 RPM to 15,000 RPM.
  • J1625: XYZ travels 2,500 mm, 1,600 mm, 500 mm; max. work size 2,700 mm x 1,700 mm; table load 6,500 kg; ATC 20, 60, 90, 120 tools. Spindles are offered from 10,000 RPM to 15,000 RPM.

All of the machines feature a full enclosure and various coolant system options.

For more information contact:

Mitsui Seiki USA Inc.

563 Commerce Street

Franklin Lakes, NJ 07417

201-337-1300

info@mitsuiseiki.com

www.mitsuiseiki.com

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