Paul H Wawrzonek

6446013, Sep 3, 2002

Jul 20, 1999

09/357178

William A. Veronesi - Hartford CT
Stephen E. Tolman - Vernon CT
Paul H. Wawrzonek - Bondsville MA

United Technologies Corporation - Harftord CT

G01B 528

702 39, 72 53

The rate of impact between the peening elements and an internal surface of a hollow part is a function of the vibration frequency, and there is a cut-off frequency at which a hollow part can vibrate and induce repeated impact between its internal surface and the peening elements because the rate of impact becomes erratic and loses its cyclical nature as the vibration frequency deviates from the cut-off frequency. The present invention provides a method for determining the cut-off frequency at which a hollow part can vibrate and maintain the repetitive nature of the impact between its internal surface and the peening elements. Such a method requires a peening element speed limit ratio, which is the ratio of the velocity of the hollow part compared to the velocity of the peening element above which the rate of impact begins to become erratic and lose its cyclical nature. The present invention, therefore, teaches a method of determining the peening element speed limit ratio.

6679121, Jan 20, 2004

Nov 6, 2001

09/994380

H. Eric Sonnichsen - Stow MA
Paul H. Wawrzonek - Bondsville MA
Richard B. Connell - Shrewsbury MA
Borislav D. Milatovic - Hudson MA

Test Devices, Inc. - Hudson MA

G01H 100

73660, 73671

An apparatus and method for testing vibration in a bladed disk includes a motor-driven rotor upon which the bladed disk can be attached. At least one nozzle coupled with a liquid source is positioned to direct liquid from the liquid source to a position where it would impact at least one blade of the rotating bladed disk. The stress state and/or position of a rotating blade, so impacted, can be monitored to test its vibration characteristics.

8419270, Apr 16, 2013

Jun 22, 2009

12/489023

Paul Wawrzonek - Bondsville MA, US
H. Eric Sonnichsen - Marlborough MA, US
Robert L. Murner - Wilbraham MA, US

Test Devices, Inc. - Hudson MA

G01N 3/00
G01K 1/00
G01K 3/00

374 46, 374144, 374137, 374141

A test facility includes a heat source to thermally load a test object being mechanically loaded by rotation imposed by a spin test rig. The heat source can be a quartz lamp controlled to provide a thermal load with a differing phase than the mechanical load. Testing cycles can be run for the test object, with impingement cooling permitting the removal of the thermal load between cycles. The test facility emulates operating conditions in a gas turbine engine to impose realistic thermal and mechanical fatigue stress on the test component.

61703087, Jan 9, 2001

Jul 20, 1999

9/357260

William A. Veronesi - Hartford CT
Pedro Sainz de Baranda - Farmington CT
Vincent C. Nardone - South Windsor CT
Stephen E. Tolman - Vernon CT
Paul H. Wawrzonek - Bondsville MA

United Technologies Corporation - Hartford CT

B21D 2614
B24C 100

72 53

The rate of impact between the peening elements and an internal surface of a hollow part is a function of the vibration frequency, and there is a cut-off frequency at which a hollow part can vibrate and induce repeated impact between its internal surface and the peening elements because the rate of impact becomes erratic and loses its cyclical nature as the vibration frequency deviates from the cut-off frequency. The present invention provides a method for determining the cut-off frequency at which a hollow part can vibrate and maintain the repetitive nature of the impact between its internal surface and the peening elements. Such a method requires a peening element speed limit ratio, which is the ratio of the velocity of the hollow part compared to the velocity of the peening element above which the rate of impact begins to become erratic and lose its cyclical nature. The present invention utilizes the peening element speed limit ratio to determine the frequency at which to vibrate the hollow part when peening its internal surface so as to and maintain repeated impact between it and the peening elements.