Metal deforming – With cutting – By composite tool
Patent
1979-01-03
1980-10-14
Mehr, Milton S.
Metal deforming
With cutting
By composite tool
83191, B21D 3102
Patent
active
042273935
ABSTRACT:
An apparatus for punching openings in tubing (T) includes a stationary mandrel (50) having a guide aperture (142) through the walls thereof and adapted for insertion within the tubing to be punched. A moving actuator (110) having an inclined ramp (130) on one end is receivable within the stationary mandrel. A punch (134) is provided having an inclined end for engagement on the inclined ramp of the moving actuator and an opposite end for engagement through guide aperture (142) in the wall of the stationary mandrel. A T-shaped slot (136) is provided on the inclined end of the punch and a corresponding T-shaped ramp (132) is provided on the inclined ramp of the moving actuator. The engagement of ramp (132) in slot (136) provides for sliding engagement of the punch on the actuator. T-shaped slot (136) and ramp (132) are symmetrical about a plane through the longitudinal axis of the punch and the moving actuator. A stop bar (56) extends to one side of stationary mandrel (50). A plurality of stop arms (66) are hingedly secured to the stop bar for selective engagement against stationary mandrel (50) to act as dimensioning guides. A clamp structutre (60) is supported from stop bar (56) and is selectively movable from a first position circumferentially engaging the tubing mounted on the stationary mandrel and a second position wherein the clamp structure is removed from circumferential engagement of the tubing. Clamp structure (60) has an indentation (154) therein corresponding to the position of punch (134) such that the side wall of the tubing surrounding the area to be punched is supported during the punching operation.
REFERENCES:
patent: 2749983 (1956-06-01), Rogers
patent: 2884066 (1959-04-01), Teplitz et al.
patent: 3064707 (1962-11-01), Walts
patent: 3087362 (1963-04-01), Genier
patent: 3259003 (1966-07-01), Griffin
patent: 3271988 (1966-09-01), Klinksiek
patent: 3811352 (1974-05-01), McFadden
patent: 3815399 (1974-06-01), Foulks et al.
patent: 3995518 (1976-12-01), Spiroff
Anvil Corporation
Mehr Milton S.
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