Adjustable horn for spiral pipe forming machine

Details Adjustable horn for spiral pipe forming machine Adjustable horn for spiral pipe forming machine

2006-08-15

2006-08-15

Larson, Lowell A. (Department: 3725)

Metal deforming

By tool-couple pressing together adjacent surface portions...

To form helically-seamed tube

Reexamination Certificate

active

07089772

ABSTRACT:
An adjustable horn or mandrel for a spiral pipe forming machine. Such machines are made for continuously forming metal pipe from an elongated sheet of metal where the sheet is curled into adjacent helical convolutions in a multiple roll pipe forming head. The head includes a mandrel, and in accordance with the invention a mandrel mount is provided for vertical adjustment of the mandrel. The mandrel mount has opposite side supports sandwiching the mandrel and a motor mounted for raising and lowering the mandrel between the side supports. Raising and lowering is accomplished via a pair lead screws secured to the mandrel, each having a gear threadedly engaged thereon and which is driven by the motor. The mandrel is also horizontally adjustable.

REFERENCES:
patent: 2862469 (1958-12-01), Jensen
patent: 4070886 (1978-01-01), Nyssen
patent: 4436239 (1984-03-01), Tsuyama et al.
patent: 4578971 (1986-04-01), Leweke et al.

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