A survey of the dynamic characteristics of toolholders for diamond turning

Conference · Sat Jul 01 00:00:00 EDT 1989

OSTI ID:7197496

Franse, J. ^[1]; Roblee, J. ^[2]

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1. Philips Research Labs., Eindhoven (Netherlands)
2. Lawrence Livermore National Lab., CA (USA)

Four different sized toolholders used in diamond turning at LLNL were tested for their dynamic compliance at the tool tip. Two of the toolholders were entirely of LLNL design, one was an LLNL modified, special order toolholder, and one was a general purpose, commonly available toolholder. The toolholder is a critical component of a diamond turning machine because it is the final element in the structural loop between tool and workpiece. Unfortunately, its compliance is often overlooked when designing a machine tool because of their small size and high strength. However, high strength does not equate to high stiffness, and the requirements of convenient tool height adjustment and angular orientation often dominate stiffness considerations. Finally, the tool bit and the method of clamping the shank can also be a significant source of compliance. The test techniques and the equipment used for these measurements are similar to those used for testing the Precision Engineering Research Lathe. Here, each of the toolholders was rigidly attached to a massive granite table and a dummy tool bit, with the same dimensions as a diamond tool, was mounted in the holder the same way a diamond tool would be. To this dummy tool bit, an accelerometer and an electrodynamic shaker could be attached. The dynamic force applied by the shaker was measured by a quartz-crystal type, force transducer mounted in series with the shaker. From measured accelerations and forces, the dynamic compliances (amplitude and phase) of the toolholders were determined up to a frequency of 1000 Hz. Alternatively, we used a dummy tool bit with flat reference surfaces and a capacitance gage to measure the dynamic tool motion. 6 refs., 7 figs., 1 tab.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 7197496
• Report Number(s): UCRL-100125; CONF-8909314-1; ON: DE90009187
• Resource Relation: Conference: 5. international precision engineering seminar, Monterey, CA (USA), 18-22 Sep 1989
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
42 ENGINEERING
DIAMONDS
MACHINING
ACCELERATION
ACCELEROMETERS
ACCURACY
ADJUSTMENTS
BENDING
COMPLIANCE
CUTTING TOOLS
DATA PROCESSING
DYNAMICS
ELECTRODYNAMICS
FREQUENCY ANALYSIS
MEASURING METHODS
MODIFICATIONS
OPTIMIZATION
ORIENTATION
PERFORMANCE TESTING
RECOMMENDATIONS
RESONANCE
ROTATION
STRENGTH FUNCTIONS
SURFACE PROPERTIES
SURVEYS
TECHNOLOGY ASSESSMENT
TENSILE PROPERTIES
TRANSDUCERS
ADMINISTRATIVE PROCEDURES
CARBON
ELEMENTAL MINERALS
ELEMENTS
FUNCTIONS
MEASURING INSTRUMENTS
MECHANICAL PROPERTIES
MECHANICS
MINERALS
MOTION
NONMETALS
PROCESSING
TESTING
TOOLS
360603* - Materials- Properties
420200 - Engineering- Facilities
Equipment
& Techniques