Hole forming machine

Details Hole forming machine Hole forming machine

1976-06-21

1978-06-06

Schran, Donald R.

Cutting

With means to convey work relative to tool station

With work-constraining means on work conveyer

83513, 83519, 234 43, B26D 706

Patent

active

040928926

ABSTRACT:
The invention relates to a hole forming machine which has two or more punching heads for punching holes in a sheet of metal. The sheet of metal is moved relative to the punching heads in a guide frame to which is attached a stylus. The stylus is swept over a template having a pattern of pilot holes formed therein. By locating the stylus sequentially in the pilot holes and operating the punching heads, the pattern of holes on the template can be mapped on to the sheet of metal. The provision of two or more punching heads substantially reduces positional errors in the punched pattern.

REFERENCES:
patent: 2730173 (1956-01-01), Brescka
patent: 2958247 (1960-11-01), Levine
patent: 3297173 (1967-01-01), Schott
patent: 3613491 (1971-10-01), Kahmann
patent: 3738569 (1973-06-01), Killaly

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