Mitsui Seiki Offers VMC with Jig Milling/Boring Accuracy
Mitsui Seiki USA Inc. (Franklin Lakes, NJ) has launched the PJ812 CNC vertical machining center.
Posted: December 15, 2021
The VMC offers an X travel of 1,200 mm, a Y travel of 800 mm, and a Z travel of 500 mm. The maximum workpiece size is 1,200 mm × 800 mm. The table can handle a load of up to 1,500 kg. Also, the VMC provides positioning accuracy and repeatability of +/- 1 µm.
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 percent. This system also reduces Z-axis thermal growth and deflection by 30 percent. Cooling systems for slideway lubrication and ballscrew cores stabilize axis feed precision.
Mechanical design features that increase 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. According to Mitsui Seiki, a proprietary engineering detail improves the static rigidity of the Z-axis to more than six times that of conventional Z-axis arrangements.
This machining center allows for machining of precision components through processes like precision boring, milling, drilling, and tapping.
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