US1639100A - Punch press - Google Patents

Description

Aug. 16, 1927.

J. J. NEILAN PUNCH PRESS INVENTOR Filed A'Dril the auto body.

Patented Aug. 16, 1927.

"UNITED STATES:

JOHN J. NEILAN, or CLEVELAND, oHIo.

PUNCH PRESS;

Application filed April 21, 1926. Serial no. 103,568.

This invention relates to new and useful improvements in punch presses and more particularly to power driven nail-hole perforating or punch presses adapted to be adjusted for a vertical gravity feed or a horizontal hand feed of angularly formed sheet metal automobile body trim having spaced nailing tabs for rapid separate nailhole punching thereof, for nailing the trim to The present practice is to nailhole punch the nailing tabs separately by passing the trim rapidly by hand through a power driven punch press. In this manner some of the tabs are usually missed and'leftunperforated by the punch and are consequentlynot nailed when the trim is applied to an auto body. Another practice is to combine the puncher with the trim stamping and v forming dies, forming and punching the sheet metal trim simultaneously. In this practice the stresses and strains set up in the sheet metal while forming causes the punches to break often, delaying operation and production.

In my improved means for separately nailhole punching the trim tabs, an object is to,

provide adjustable guiding means co-operatmg w1th transverse gauging means for feeding the trim vertically by gravity, while gauging the tabs transversely for punchin Another object is to provide adjustable means for longitudinally gauging the tabs, co-operating with the transverse gauging and guiding means for centering the tabs for nailhole punching.

A further object is to provide adjustable means for horizontally feeding the trim by hand for nailhole punching, including adjustable transverse gauging means co-operating with adjustable longitudinal gauging means for centering the tabs for nailhole punching. Other objects and features of the invention will be hereinafter pointed out and described.

In the drawings Fig. 1 is a plan view of the punch press positioned for vertical gravity feeding of the auto body trim.

Fig. 2 is a detail plan view of the punch head and die block with parts broken away.

Fig. 3 is a detail section on line 33 of Fig. 1.

Fig. 4 is an enlarged front view of the punch head and die block.

Fig. 5 is an enlarged detail view with parts removed showing vertical the auto body trim.

Fig. 6 is a perspective of a punched by the press. Referring! s ecifically to the-drawings,- 5 indicates the frame of a punch press having a base 6, a pulley driven crankshaft? connected by connecting rod 8 to block 9 slidably mounted on guideways 10 on the frame. The block 9 has a socket 11 with set screw 12 for securing the post 13 of a punch head 14 carrying the punch 15 and an adjustable post 16 set screwed as at 17 to the head and carrygravity feeding of piece of Work ing at the end thereof a cam '18. A substantially-shaped die block 19 is secured by bolt 20'to the base 6 of the press. 1 I

The outer face of block 19 is recessed at 21 and 22a stripper 23' secured by screws 24 in recess 22 provides a slot at recess 21 through which the material or trim, as hereinafter described, is fed for punching. A punch guide 25 is mounted in stripper 23' aligning the punch with a die 28 mounted in a bore 27 in the blocln Gauging strips 28 of; graduated thickness aregadapted to be suitably secured to the outer face of block 19 for guiding. and transversely gauging the materizil for punching.

Means for longitudinally gauging the sheet metal trim is provided by a rocking gauge or stop 29 pivoted at 30 on a pin '31 between the arms of the block 19 having slot 33 therein slidably receiving the gauge toe 32. An arm 34 formed at right angles to the gauge at the pivot 30 has a knob 35 at the end thereof.

The material or trim to'be punched may be automobile body sheet metal trim indicated generally at 36 which is tamped and formed in various suit-able shapes usually having an outer face 37 which may be plain or beaded and a substantially right angled flange 38 formed with spaced projecting nailing tabs 39 which are separately punched as at 40 to receive the nails securing the trim to the auto body.

For vertical gravity feed punching the press is positioned on its back as shown in Fig. 1 and suitable guides 41 adjustably se cured to block 19 by screws 42 are positioned to co-operate with gauge 28 for guiding and feeding the trim 36 which drops between by gravity as shown in Fig. 5, the gauge 28 transversely centering the tabs for the perforating stroke of the punch. The tabs are gauged longitudinally for the perforating and 5, the crankshaft 7 through connecting rod 8 and block 9 thrusts the punch head 1d toward die block 19, forcing the punch end through a centered tab 39 into die opening 26. At this point of travel the post end 16 engages the gauge arm 29 swinging the toe 32 out of slot 21 and throwing knob 35 forward as shown in Fig. 2. Upon completion of the punch stroke the punch head let is drawn back by the crank, drawing the punch 15 out of the tab against stripper 23 allowing the tab 89 to drop.

Further withdrawal of the punch head engages cam 18 in post 16 with knob 35, forcing the knob back, throwing gauge toe 32 across slot 21 again catching and centering the next tab 39 above, which drops thereupon. The punch is now ready to re peat the cycle of operation. The gauge toe 32 is timed to catch and center each tab as the trim drops.

For horizontal feeding of the trim for punching, the press is adjusted upright on its base 6 and the trim 39 is fed rapidly against gauge 28 from the right to the left hand side the tabs passing through the slot 21. The guides 41 are omitted. The gauge 32 is timed to stop and center each tab for perforation by the punch 15 as hereinbefore.

described.

lVhile I have shown and described certain embodiments of the invention, obviously various changes in the details of construction may be made witnout departing from the spirit and scope of the appendedv claims.

I. claim 1. The combination in a punching machine for notched work, said machine having a reciprocating punch, a die, and a guide for the work, said guide having aslot extending cross-wise thereof, of a pivoted stop working in saidv slot and movable sidewise with respect to the guide to engage in a notch in the work, and means actuated by the movement of the punch to operate the stop.

2. The combination stated in claim 1, said means including a cam carried by the punch and a projection on the stop engaged by said cam. a r

3. The combination in a punching machine having a punch and a die, of a work guide having a slot therein at'substantially right angles to the path thereof, and a stop pivoted adjacent said guide and having a toe arranged to swing in said slot into the path of i the work. 7

In testimony whereof, I do afiix my signature;

JOHN J. NEILAN.

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