Surface Grinder Maintains Flatness Across Large Parts
Okamoto’s ACC-3280CHiQ double-column surface grinder is designed for high-precision grinding of large components, particularly demanding mold and die base production applications.
Okamoto’s ACC-3280CHiQ double-column surface grinder is designed for high-precision grinding of large components, particularly demanding mold and die base production applications. According to the company, the machine’s double-column design and robust construction stand up to prolonged, heavy-duty grinding conditions, while a double-V table way construction promotes accuracy.
A “reform” mechanism automatically adjusts for crossrail slide wear without CNC compensation, helping to maintain a high degree of flatness across the workpiece surface. Other notable features include a Shift-Plunge grinding cycle for fast, efficient stock removal and multi-level grinding capability to enhance flexibility.
The machine comes standard with a 30-hp spindle motor and 20" diameter concave grinding wheel. Table size is 32" × 80". Maximum pass width is 40". The maximum distance under standard wheel is 23.5". Table load capacity (including chuck) is 5,512 lbs. Larger-capacity models are also available.
All data input can be completed using only two data screens with Okamoto’s iQ software.
Other features include a grinding wheel adapter; a hydraulic wheel dresser with dress compensation; a dresser stand with diamond tool; an automatic oil temperature regulator; a spindle speed controller; and more.
The BIX high-pressure coolant system is available as an option. This system optimizes grinding throughput with a tenfold increase in vertical infeed amounts, the company says. The BIX System also minimizes wheel clogging, extending wheel life. Other options include electromagnetic chucks, a 24" grinding wheel, dynamic balancing apparatus and more.
Two enabling technologies -- superabrasive wheels and high precision servo control -- come together to provide a contour grinding process that resembles an OD turning operation. For many medium volume OD grinding applications, this method may be a means to consolidate several manufacturing steps into a single setup.
Optimizing a camshaft lobe grinding cycle has traditionally been based less on science and more on educated guesswork and numerous test grinds. Now, computer thermal modeling software can predict areas where lobe burning is likely to occur, in order to determine the fastest possible work speed that won't thermally damage lobes and greatly reduce the number of requisite test grinds.
Advanced grinding equipment gives this shop the flexibility and automation it needs to serve customers with either rapid-response or high-volume jobs.