Die head with different axial tool paths

Details Die head with different axial tool paths Die head with different axial tool paths

1982-08-11

1984-12-04

Combs, E. Michael

B23G 100

Patent

active

044855117

ABSTRACT:
A rotary die head has radially extendable and retractable thread cutting tools moving in paths of different angularity relative to the workpiece to permit one tool to cut a load flank in the workpiece at one lead and another tool simultaneously to cut a stab flank in the workpiece at a different lead, with the tools commonly generating the thread root, whereby a dual lead tapered thread may be formed on the workpiece in one pass. The respective cutting tools may have chasers with multiple teeth to permit the formation of deeper dual lead tapered threads in one pass. The die head may also have a radially extendable and retractable turning tool commonly driven with but moving in opposite directions from the thread cutting tools, whereby the turning tool when extended may form a seal or thread relief surface on the workpiece while the thread cutting tools are retracted.

REFERENCES:
patent: 3082446 (1963-03-01), Benninghoff
patent: 3829920 (1974-08-01), Theverkauf
patent: 4118140 (1978-10-01), Hamilton

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