Tapping attachment for a punch press

Details Tapping attachment for a punch press Tapping attachment for a punch press

B - Operations, Transporting

23

G

10/25

B23G 5/20 (2006.01) B23G 3/00 (2006.01) B23Q 5/04 (2006.01) B23Q 11/10 (2006.01)

Patent

CA 2014784

A tapping attachment (1) for threading a relatively large number of holes through a sheet metal part at a relatively low cost per hole. The tapping attachment includes a thrust bearing assembly (6) which is aligned with a turret-type punch press or the like and movable in response to an axially directed force generated by the punch press. The axially directed force applied from the press to the thrust bearing assembly is transferred to a spline shaft (26). The spline shaft is rotated within and moved linearly relative to a screw threaded roller nut (74), whereby the axially directed force is converted into a rotating force for advancing and turning a tap (80) at high speeds of rotation. A nitrogen reservoir (14) is provided so that a supply of gas is available for returning the thrust bearing assembly and the spline shaft to their initial positions in order that a new hole can be tapped in response to another axially directed force. Also provided is an oil reservoir (12) so that a supply of oil is available for lubricating and cooling the tap via an oil spout.

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