Double cut die set with improved pull-across notching feature

Details Double cut die set with improved pull-across notching feature Double cut die set with improved pull-across notching feature

1983-10-07

1985-02-19

Schran, Donald R.

Cutting

Cutting motion of tool has component in direction of moving...

Tool carrier shuttles rectilinearly parallel to direction of...

83 54, 83300, 83382, 83519, B23D 2100, B26D 316

Patent

active

044998031

ABSTRACT:
Tube cutoff apparatus of the double cut type wherein a horizontal blade passes across and notches a section of tube wall prior to the entry of a vertical severing blade. The horizontal blade holder assembly comprises a carriage which is interconnected with the base by means of a pair of parallelogram links. In one embodiment the horizontal blade holder assembly is driven through an arcuate path of travel by a depending dogleg cam which is mounted on the upper platen assembly of a die set. In a second embodiment the horizontal blade holder assembly is driven by a linkage including a triangular link and a drive link connected to the upper platen assembly. The result in both cases is to drive the horizontal blade holder assembly through an arcuate path which carries it downwardly and away from the path of the vertical blade in a minimum vertical stroke length. In both embodiments, means are provided for adjusting the vertical position of the notching blade relative to the tube section to accommodate tubes of varying diameter.

REFERENCES:
patent: 3938415 (1976-02-01), Borzym
patent: 4108029 (1978-08-01), Borzym
patent: 4109555 (1978-08-01), Borzym
patent: 4294149 (1981-10-01), Borzym
patent: 4337680 (1982-07-01), Borzym
patent: 4361064 (1982-11-01), Sasaki
patent: 4392644 (1983-07-01), Borzym
patent: 4457200 (1984-07-01), Borzym

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