A -- IN-PROCESS CHATTER AVOIDANCE DISPLAY

Notice Date

June 19, 2001

Contracting Office

Department of Commerce, National Institute of Standards and Technology (NIST), Acquisition and Logistics Division, 100 Bureau Drive, Building 301, Room B129, Mail Stop 3571, Gaithersburg, MD, 20899-3571

ZIP Code

20899-3571

Description

Researchers at the National Institute of Standards and Technology (NIST) are working on the following technologies: An invention is described which uses once-per-revolution sampling of the audio (or other appropriate sensor) signal during cutting to detect chatter (i.e., unstable machining). The synchronously sampled audio (or other appropriate sensor) machining data is shown on a real-time LED display that allows the user (machinist) to visually detect the onset of chatter and adjust machining conditions. This method of chatter avoidance requires no knowledge of machine dynamics, process specific cutting energy coefficients, or chatter theory; all of which are the key impediments to the successful implementation of high-speed machining on the shop floor. The device described here requires no interface with the machine tool controller and could be added as an after market supplement. Additionally, it is shown that the use of this device allows determination of the well-known stability lobe diagrams without direct knowledge of the tool point dynamic response or cutting energy coefficients. For further information, contact: National = Institute of Standards and Technology, Office of Technology Partnerships, 100 Bureau Drive, Stop 2200, Gaithersburg, MD, 20899; This is not an announcement of a contract action or a grant.

Web Link

Visit this URL for the latest information about this (http://www.eps.gov/spg/DOC/NIST/AcAsD/NISTDOCKETNUMBER01-014PA/list= ing.html)

Record

Loren Data Corp. 20010621/SPMSC017.HTM (D-170 SN50P3M3)