Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1984-11-13
1986-06-10
Rosenbaum, Mark
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
2940207, 2940218, 295276, 29703, 29720, 219 61, 219 7614, 2191171, 21912431, 21912433, 21912511, 228102, 228103, 228119, 228162, B21D 5300, B23K 904, B23P 600, B23Q 1500
Patent
active
045934452
ABSTRACT:
An apparatus and a method for remotely refurbishing valve seats are disclosed herein. The apparatus generally comprises a welding assembly having a welding head for depositing a bead of metal around the valve seat, and a positioning assembly detachably mountable onto the valve body for angularly and radially moving the welding head around the valve seat at a selected point along the axis of rotation of the seat. Additionally, the apparatus includes a control means operatively connected to the positioning assembly for controlling the movement of the welding head around the valve seat. In operation, the control means, which may include a microprocessor, first angularly moves the welding head 360.degree. around the circumference of the valve seat, then moves the welding head to a different point along the axis of rotation of the valve seat, and then rotates the welding head 360.degree. around the valve seat again for as many cycles as is necessary to rebuild the valve seat. The resulting deposit of metal beads is finally ground down into a desired contour. Both the apparatus and the process of the invention are particularly useful in refurbishing the seats of valves located in areas of limited accessibility, such as the governor valves in the steam chest of a turbine generator.
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Glosecki David M.
Snyder David A.
DePaul L. A.
Rosenbaum Mark
Wallace Ronald S.
Westinghouse Electric Corp.
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