Method of producing a rack from pipe material and a rack thus pr

Details Method of producing a rack from pipe material and a rack thus pr Method of producing a rack from pipe material and a rack thus pr

1984-04-25

1986-07-08

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

74422, B29D 1500

Patent

active

045984514

ABSTRACT:
A pipe material is tightly clamped into a first pair of split forming dies to form a first formed tubular body which comprises a cylindrical wall part and a flat wall part, and then the first formed body is clamped tightly into a second pair of split forming dies, the interior of which is formed to be complementary to a toothed rack to be produced on the flat wall part. A mandrel is then forcefully inserted, either with or without vibration, into the bore of the first formed part while contained within the second forming dies, so that the teeth of a rack are formed on the flat wall of the first formed part by plastic deformation. A rack thus produced from a pipe material is light in weight and inexpensive, while functionally equivalent to a rack conventionally produced by machining from a round bar.

REFERENCES:
patent: 1879663 (1932-09-01), Dreyer
patent: 4133221 (1979-01-01), Clary

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