US656106A - Metal-punch. - Google Patents

Description

Nu. 656,")6. Patented Aug. I4, I900.

A. W. GDDDARD.

METAL PUNCH.

(Application filed my 12, 1900.) (No Model.) 2 Sheets-Sheet l.

ND. 656,!06. Patented Aug. I4, I900.

A. w. GODDARD.

M E T A L P U N C H (Application filed May 12, 1900.)

(No Model.) 2 Sheets-Shaet 2,

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UNITED STATES ATENT ERIC,

ANsoN w. GODDARD, or EARNAM, NEBRASKA, ASSIGNOR on ONE-HALF TO CHARLIE C. CALDWELL, or LINCOLN, NEBRASKA.

METAL-PUNCH.

SPECIFICATION forming part of Letters Patent'No. 656,106, dated August L4, 1900.

Application filed May 12, 1900. Serial No. 16,498. (No model.)

To all whom, it may concern.-

Be it known that I, ANsoN W. GODDARD, a citizen of the United States, residing at Farnam, in the county of Dawson and State of Nebraska, have invented a new-and useful Metal-Punch, of which the followingis a specification.

This invention relates to metal-punches in general, and more particularly to that class employed for punching heavy metal, although the principles involved may be applied to a stamping-press, as will be readily understood.

One object of the inventionis to provide a construction in which the metal to be punched will be automatically grasped to hold it in proper position relative to the punching-tool and in which, furthermore, a maximum pressure will be applied to the operating parts.

Further objects of the invention will be apzo parent from the following description.

In the drawings forming a portion of this specification, and in which like numerals of reference indicate similar partsin the several views, Figure lis a perspective view showing the complete tool with the jaws separated.

Fig. 2 is a central Vertical section of the tool. Fig. 3 is a section on line 3 3 of Fig. 2.

Referring now to the drawings, the punching-press of the present invention comprises a supporting-plate 5, which is adapted to be secured to a post or to any other form of base,

and centrally of this plate is formed or secured a guide-plate 6, having oppositely-extending flanges 7 and 8 at its side edges, these 3 5 flanges lying parallel with the plate 5 and separated therefrom by an interspace.

In the present construction the table 9 and the head 10 are both movable. The table 9 has a longitudinal groove which corresponds 0 to and receives the guide-plate at the lower portion of the latter, while the head 10 has a similar groove which receives the upper portion of the guide-plate. With this arrangement the table and head may be both moved along the guide-plate toward and away from each other. The table 9 and head 10 are similar in outline, and when in mutual Contact they present a segment of a disk, the chord of the segment lying against the supportingplate, as shown, and the adjacent ends of the table and head are flat and parallel to form the jaws of the press.

In the jaw-face of the table is formed arecess 12, in whichis disposed a die-plate 13, held in place bymeans of set-screws 14 in the usual manner. The table is adapted to hold the female die, as is usual, and leading to the recess 12 is a passage'14, through which the punc'hi'ngs pass. The head 10 has also a recess 22 inits jaw-face and which recess receives the dieplate 23, which carries the punch. This plate is also held in place by means of set-screws and is adapted for adjustment to aline the punch with the die in the table.

In order to reciprocate the head and table simultaneously in opposite directions to cause the punching operation, a shaft 15 is mounted in bearings in blocks 16, secured to the outer face of the supporting-plate and above the head 10, this shaft being provided with a lever 17 for oscillating the shaft, although it will be readily understood from the following description that the shaft may be rotated instead, by means of the usual belt and pulley, from asuitable source of power. The shaft 15 comprises three cranks lying between the bearing-blocks, and of these three cranks the outermost ones extend in the same direction and lie in a common plane. The third or central crank extends in an opposite direction from the first-named cranks, but lies in the same plane therewith, the outermost cranks being adapted to operate the table, while the central crank operates the head. In order to operate the table from the outermost cranks referred to, connecting- rods 20 and 21 have their upper ends pivotally mounted upon said outermost cranks. The lower ends of the connecting-rods are projected forwardly, as shown at 25, and these projecting portions are pivoted to the sides of the table. This form of connecting-rod throws the upper portion thereof rearwardly to lie close to the supporting-plate, so that the rods do not interfere with the manipulation of the stock in the press. A third connectingrod 26 has its upper end pivotally connected with the central crank of the shaft 15, while the lower end of the rod is out arc-shaped in the plane of rotation of the connected crank and rests with this are shaped lower end against the flat bottom of a recess 28 in the head 10. Thus when the shaft 15 is rotated the central crank thereof will press the connecting-rod 26 downwardly and force the head 10 in the direction of the table 9. The arc-shaped formation of the lower end of the connecting-rod insures proper pressure of the rod against the head at all times. To cause the head to ascend as the rod is drawn upwardly by its crank, a spring-metal strap 29 has one end attached to the head 10, while its other end is attached to the connectingrod, the yieldability of this strap permitting the rod to rock in its engagement with the head.

A presser-finger 30 for holding the metal upon the die in the table consists of a springmetal plate which has a downturned end attached to the guide-plate 6 in such manner that the finger will project over the die in the table, so that when the table rises it will move the metal against the finger to hold the metal clamped between the finger and the plate. The outer end of the finger is notched to permit the passage of the punch to the metal.

It will of course be understood that in practice the present mechanism may be mounted upon a base of any style desired and that modifications thereof may be made; also, that any suitable materials and proportions may be used Without departing from the spirit of the invention.

\Vhat is claimed is 1. A punching-press comprising a supporting-plate, a flanged guide-plate carried by the supporting-plate, a slotted table engaged with the guide-plate, a slotted head engaged with the guide-plate, recesses in the head and table for the reception of dies, and means for moving the head and table simultaneously toward and away from each other.

2. A press comprising a supporting-plate having afianged guide-plate thereon, a movable table engaged with the guide-plate,a movable head engaged with the guide-plate, said table and head being adapted to receive cooperating dies, a finger mounted upon the guide-plate in operative relation to the table to exert a clamping action thereagainst, and means for moving the head and table simultaneousl y toward and away from each other.

3. A press comprising a supporting-plate, a crank-shaft mounted on the plate, a table slidably engaged with the plate, a head slidably connected to the plate, a recess in the head a connecting-rod engaged with a crank of the shaft and having an arc-shaped lower end resting upon the base of the recessto press the head in one direction as the shaft is operated, a strap connecting the rod and head to raise the head when the shaft is further rotated, and connections between the table and additional cranks of the shaft for reciprocating the table.

4. A press comprising a supporting-plate having a guide-plate provided with flanges, a table slidably engaged with the guide-plate and adapted to receive a die, a head slidably engaged with the guide-plate and adapted to receive a die, a crank-shaft, rods connected with the shaft and the table for reciprocating the latter as the shaft is rotated, a clampingfinger in operative relation to the table, a recess in the head, a connecting-rod having its lower end arc-shaped and resting upon the base of the recess, said rod having connection with the shaft for reciprocation thereby, and a strap connecting the head and its rod, said head being adapted to receive adie.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

ANSON W. GODDARD.

Vitnesses:

O. J. GARVEN, O. L. DUNHAM.

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