B - Operations – Transporting – 21 – J
Patent
B - Operations, Transporting
21
J
29/49
B21J 5/00 (2006.01) B24C 1/00 (2006.01) B24C 1/10 (2006.01) B24C 3/00 (2006.01)
Patent
CA 1191672
Shot Peening Apparatus Abstract In apparatus for shot peening, gravity is used to accelerate uniform sized steel shot, and thereby impart a combination of good surface finish and uniform com- pressive stresses to workpieces. It is especially use- ful for finishing gas turbine airfoils. Shot is intro- duced into the peening enclosure (28) through a gate (40) at near zero velocity. It is then accelerated along a streamline (31) toward the workpiece (18) with uniform velocity. The workpiece, positioned along the streamline, can be manipulated in three rotational modes: oscillatory rotation to uniformly peen con- toured surfaces of a workpiece, periodic incremental rotation to peen different sides of a workpiece; and, tilting motion to enable peening of shoulders (22). The apparatus is especially suited to peening fragile workpieces such as gas turbine airfoils (18). A di- verter plate (44) intercepts the shot stream at times when repositioning of a fragile workpiece is under- taken. Thus, possibly damaging impacts are avoided and steady state operation is able to be promptly resumed.
409436
Loersch Joseph F.
Neal James W.
Alan) Swabey & Co. Alan (swabey & Cie.
United Technologies Corporation
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