Mechanical heat exchanger punch tool and method

Details Mechanical heat exchanger punch tool and method Mechanical heat exchanger punch tool and method

1989-06-05

1990-06-26

Watts, Douglas D.

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

2940208, 30 92, B23P 2106, B23P 1536

Patent

active

049360132

ABSTRACT:
A punch tool is disclosed for creating an aperture in the wall of a heat exchanger tube. The punch tool comprises a cylindrical stem and bit means which is inserted into the tube from the tube sheet. The stem is retracted while the bit is forced upright by a rigid rod and punctures the tube.

REFERENCES:
patent: 3898896 (1975-08-01), Suhay
patent: 4165784 (1979-08-01), Gardner
patent: 4455746 (1984-06-01), Idzik et al.
patent: 4466185 (1984-08-01), Montiero
patent: 4646816 (1987-03-01), Rothstein
patent: 4730392 (1988-03-01), Allen

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