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Shigiya (USA) Ltd. has upgraded its GPV-10 vertical CNC grinder to include polygon capability. Engineered in response to customer demands, Shigiya's new GPV-10-20 vertical CNC grinder incorporates the advanced polygon grinding technology utilized in their successful GPES Series.
The GPV-10-20 features a compact footprint to accommodate a range of production line layouts. Its main body is approximately 1m2 (10.76 square feet), or about half the size an existing Shigiya GAC-20 Grinder. A smaller size results in a machine that's less expensive than a horizontal version without sacrificing accuracy or advanced features.
Including a workhead that is powered by a direct-drive motor, the GPV-10-20 grinds small workpieces with greater precision and control than a belt-driven grinder. This direct drive motor has been upgraded from the original GPV-10 to facilitate polygon grinding. An innovative gate structure further ensures accuracy by counter measuring against vibration, thermal displacement and noise. A top beam securely connects the upper portion of the two columns. The superior rigidity of the GPV-10-20 ensures extreme precision after a cold start, and even during post-process grinding.
Further contributing to GPV-10-20 accuracy is Shigiya's original non-concentric hydrodynamic bearing for the wheel spindle. Mounted on the wheel side of the wheelhead, this bearing maintains low processing heat by optimizing the bearing clearance and the wedge angle. Infeed is performed by the table moving toward the wheel.
Features that promote ease of use include a wide machine opening that allows for flexible automation of loading/unloading and easy maintenance, an electrical control panel hinged on the rear of the machine that swings open wide to ensure enough working space for easy wheel change. The grinding wheel is not angled and does not require a wheel changer to be changed.
The GPV-10-20 includes the option to install the control panel on the left or the right side of the machine for easy automation in tight spaces.
Specifications for the GPV-10-20 include a swing over table of 100mm (3.93 inches) in diameter, a maximum work piece height of 200mm (7.87 inches) and a weight capacity of 10 kg (22.05 lbs).
Related Glossary Terms
- clearance
clearance
Space provided behind a tool’s land or relief to prevent rubbing and subsequent premature deterioration of the tool. See land; relief.
- computer numerical control ( CNC)
computer numerical control ( CNC)
Microprocessor-based controller dedicated to a machine tool that permits the creation or modification of parts. Programmed numerical control activates the machine’s servos and spindle drives and controls the various machining operations. See DNC, direct numerical control; NC, numerical control.
- grinding
grinding
Machining operation in which material is removed from the workpiece by a powered abrasive wheel, stone, belt, paste, sheet, compound, slurry, etc. Takes various forms: surface grinding (creates flat and/or squared surfaces); cylindrical grinding (for external cylindrical and tapered shapes, fillets, undercuts, etc.); centerless grinding; chamfering; thread and form grinding; tool and cutter grinding; offhand grinding; lapping and polishing (grinding with extremely fine grits to create ultrasmooth surfaces); honing; and disc grinding.
- grinding wheel
grinding wheel
Wheel formed from abrasive material mixed in a suitable matrix. Takes a variety of shapes but falls into two basic categories: one that cuts on its periphery, as in reciprocating grinding, and one that cuts on its side or face, as in tool and cutter grinding.
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