Hot grip assembly
AssigneeGeneral Electric Company
InventorsJeffrey L. Myers, Robert W. Aho, Douglas M. Carper, Earl D. Deaton, Thomas J. Dunyak, Ely E. Halila
Life of this patent
Estimating the term…
Abstract
A gripping system for use in uniaxial testing of test specimens at elevated temperatures, typically above 900.degree.-1000.degree. F. The uniaxial mechanical testing is typically tensile testing conducted on high temperature engineering materials which operate under severe conditions at elevated temperatures. The gripping system includes a gripping element having a first section adapted to contact the test specimen wherein a heater is received in the second section for heating the gripping surface. The heater is designed to heat the gripping surface and the test specimen to the desired temperature.
Claims18
A gripping element for use with a hydraulic wedge gripping machine for uniaxial mechanical testing a test specimen at elevated temperatures and having means for receiving said gripping element, said gripping element comprising a first section adapted to contact the gripping machine, said first section having a passageway adapted to receive a cooling fluid, and a second section having a gripping surface adapted to contact the test specimen wherein a heater is received in said second section for heating the gripping surface.
A uniaxial mechanical testing machine comprising:
- a frame;
- a first wedge grip mounted to said frame and a second wedge grip, said first grip and said second grip adapted to hold and elongate a test specimen along a longitudinal axis which passes through the test specimen;
- each of said grips having a recess and adapted to receive a pair of gripping wedge shaped elements;
- each of said gripping wedge shaped elements comprising:
- a first wedge shaped section having a passageway adapted to receive a cooling fluid, and adapted to contact a respective grip and a second section having a gripping surface adapted to contact the test specimen wherein a heater is received in said second section for heating the gripping surface, so that a gripping surface of one of said pair of element faces a gripping surface of the other of said pair of said gripping elements and an end of the test specimen is adapted to be sandwiched under clamping pressure between and frictionally held in place by said respective gripping surfaces;
- and
- means for moving said first grip in relation to said second grip along the longitudinal axis.
Dependencies are inferred from the claim text.