The invention relates to a manufacturing process of a
tin-
phosphor bronze stretching rod. The manufacturing process flow with the product specification of phi 15-phi 38 mm comprises the following steps of: carrying fusion
casting; sawing a cast
ingot; carrying out diplopore
extrusion by using a 4000-
ton oil press; sawing;
pickling; stretching; carrying out intermediate annealing; finishing; annealing a finished product; and packaging. The manufacturing process disclosed by the invention can carry out the fusion
casting on an
ingot blank by using a cored or coreless line-frequency furnace, carry out the diplopore
extrusion by using the 4000-
ton oil press, carry out gate stretching on a rod blank subjected to the diplopore
extrusion by adopting a chain stretcher and carry
out stress-relief annealing on the rod by adopting a
resistor annealing furnace, thereby greatly improving the production efficiency, meeting the requirement of a customer, simplifying the technical treatment process, cancelling the heading mode of a
burning head furnace, reducing the
energy consumption, further reducing the production cost, realizing the short-flow operation, shortening the production period, improving the integrated finished product ratio, improving the production efficiency, enlarging the product range, reducing the
energy consumption and realizing the industrialized production.