Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1977-03-15
1978-12-12
Larson, Lowell A.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29401A, 51217R, B23P 1502, B23P 1302
Patent
active
041289293
ABSTRACT:
The method of restoring the worn edge surfaces of the shroud portion of a turbine component, such as a blade of the type having a ribbed mounting base at one end, which involves the steps of applying welding material to the worn edges of the shroud portion so as to build up the same beyond the dimensions of the shroud of a new component, and thereafter clamping the blade by its base in a fixture having a reference surface with a fixed position-relationship with respect to one edge of the shroud of a new blade of the type being refurbished when said new blade is similarly clamped in the fixture, and grinding off the added or overlay metal from the one edge of the built-up shroud until such edge is restored and duplicates the fixed relationship with respect to the reference surface. Thereafter the blade is clamped in a second fixture which has a supporting surface so arranged as to back up the one restored edge and thereby accurately position the blade with respect to the fixture, and then a remaining one of the built-up edges is restored. Finally, the blade is clamped in a third fixture having multiple surfaces backing up respectively the one restored edge and the remaining restored edge, while a third edge of the shroud is resurfaced. The method is characterized by high accuracy and good repeatability; excellent uniformity between successive units being refurbished thereby results.
REFERENCES:
patent: 1755321 (1930-04-01), Hendrickson
patent: 2565925 (1951-08-01), Lombard et al.
patent: 3127710 (1964-04-01), Karbowski
patent: 3331166 (1967-07-01), Brenning
patent: 3376674 (1968-04-01), Ernesto
patent: 3423885 (1969-01-01), Crandall
patent: 3818646 (1974-06-01), Peterson
patent: 3988126 (1976-10-01), DeMusis
patent: 4028788 (1977-06-01), DeMusis
Crane Daniel C.
Larson Lowell A.
Lehmann H. Gibner
Lehmann K. Gibner
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