Five-axis CMM inspection lets "good times roll" in QC department at small engine plant
Scanning probes speed form-data collection and feedback to machining cells, reduce
CMM fixturing and cut probe calibration time from hours to minutes at Kawasaki's Maryville, MO plant. Increased measurement throughput and flexibility allow faster feedback to manufacturing and R&D department, while scanning CMMs may ultimately eliminate inspection systems for gears and cam lift.
Maryville, MO – Kawasaki encourages motorcycle enthusiasts to "let the good times roll," but good times of another sort are rolling at the company's Maryville, MO small engine plant, where two 5-axis scanning probe systems are slashing CMM inspection and probe calibration times, and speeding up QC feedback for machining of small engine components. The 5-axis Renishaw REVO systems, installed on Mitutoyo Crysta-Apex 121210 CMMs, replaced two PH10 articulating heads using SP25 scanning probes on traditional 3-axis CMMs. The REVO-equipped CMMs have cut inspection times by half or more on scanning intensive applications, eliminated the need for custom probe configurations, cut probe calibration times from six to seven hours to about 45 minutes, and added new capability to collect large amounts of form measurement data, improving part quality. Of primary importance, the REVO systems have greatly increased inspection throughput, data quality and flexibility of the QC department, enhancing its value as a strategic support asset to both manufacturing and R&D.
The Kawasaki Production System
Kawasaki's 800,000 square-foot Maryville plant, opened in 1989, produces single and twin-cylinder air-cooled or water-cooled engines, 1000 cc or smaller, for commercial and consumer lawnmower OEMs, as well as for a sister plant that manufactures ATVs and Mule™ utility vehicles. Operations at Maryville include aluminum die-casting, plastic injection molding, extensive amounts of machining, painting and assembly. All engines – approximately 500,000 per year – are run-off before shipping as well.
"We use the Kawasaki Production System (KPS)," said JC Watts, Quality Control Technical Group Supervisor at the Maryville plant. "Our quality and engineering requirements are comparable to the best in the automotive industry, though our manufacturing is focused on lower volumes of many different kinds of products." The plant has 50 machining lines, typically arranged in a U-cell pattern with start and end machines across from each other. "Primarily, it's one-piece production with machining lines running a part through multiple processes at a high rate," Watts explained. Kawasaki utilizes automation in many die cast and some machining operations, accomplished through the integration of Kawasaki robots. On one of the crankcase lines, robots load raw materials and unload finished parts that are placed into inventory for assembly to draw upon. Machined parts include aluminum, cast iron and steel.
