DID YOU KNOW…
April 24, 2011
Typical honing systems are standalone, dedicated machines. The flexibility provided by the in-process PAGS honing system incorporated into a Mazak CNC Machining Center effectively eliminates the need for the dedicated equipment as well as streamlines the process, resulting in a significant cost-savings for the end-user. Common markets for high precision honing (developing a structured surface by abrading metal with abrasive stones) include machine parts for gas/diesel engines, aircraft components, compressor bodies, liners and tubes.
Not seen in the industry before and with patent protected tooling, Bates developed this on-the-fly honing system for CNCs with the help of HEIDENHAIN.
“This really has been a collaboration of experts over the last few years in order to enable this important paradigm shift in honing and air gaging for use on flexible and agile platforms,” said Darrell Day, president of Bates Technologies. “The overwhelming support and expertise from HEIDENHAIN has contributed into allowing our PAGS to talk to our customers’ PLCs and make this truly an in-process system.”
The particulars of the PAGS in process gaging system for use on CNCs includes the use of a controlled air pressure flowing through orifices located on the hone tool body to measure changes in the bore size as it is honed. This air pressure differential is detected by an A/E (Air to Electronic) box where the pressure differential is changed into an electronic signal. This information is then passed onto the GAGE-CHEK unit which has been programmed to monitor the changes in bore size during the process. This information is visually available to the operator through the unit’s DRO function. As the bore size grows larger with each stroke of the honing tool, the gaging unit mounted on the side of the machine displays its dimensions in microns, and when the correct size is reached, the CNC machine PLC is fed information from the GAGE-CHEK to notify it to complete its cycle, and automatically stops.
Day continued, “At the very initial stages of this project development, we had tried a competitor’s gage box but had issues with configurations. The GAGE-CHEK DRO has proven to be extremely flexible and reliable, as well as easy to use. After initially mastering the PAGS with the GAGE-CHEK unit, it has seamlessly provided accurate data to the CNC machine even through multiple tool changes and varying finish bore diameters.”
The HEIDENHAIN GAGE-CHEK (model ND 2100G) metrology display is well known for its use with multipoint inspection apparatuses in manufacturing and quality assurance industries. With inputs for up to eight gages, it is predestined for multipoint measurements from simple pass/fail detection up to complex SPC evaluation.
“And the cost of the GAGE-CHEK is reasonable too,” explained Day.
Day believes the future of their PAGS system will further advance the ability of a CNC machine to offer a closed loop process with the information provided by the GAGE-CHEK unit to allow for automatic size compensation of the tooling (boring, reaming, etc.) that is used prior to the honing process.
Established in the honing business in 1985, along with the purchase of the Micromatic Hone Tool and Abrasive Group from Textron in 2005, Bates Technologies LLC (www.batestech.com) is now a division of Lapmaster International and is one of the leading developers of specialized honing technologies for use on both dedicated honing machines as well as on many flexible and agile machining centers and work centers.