US2419382A - Apparatus for cutting sheet metal and the like - Google Patents

Description

April 22, 1947 F. E. WARING APPARATUS FOR CUTTING SHEET METAL AND THE LIKE Filed NOV. 2, 1945 5 Sheets-Sheet 1 2 In Uentor y 7 a MM.

Attorney April 22, 1947. F. E. WARING 2,419,382

APPARATUS FOR CUTTING SHEET METAL AND THE LIKE 5 Sheets-Shet 2 Filed Nov. 2, 1943 A ttorne y April 22, 19.47. F. E. WARING 2,419,382

APPARATUS FOR CUTTING SHEET METAL AND THE LIKE I F'iled Nov. 2, 1943 5 Sheets-Sheet 3 nventor Attorney Patented Apr. 22, 1947 APPARATUS FOR CUTTING'SHEET METAL AND THE LIKE Frank Edgar Waring, Cheshire, England Application November 2, 1943,'-Serial No. 508,746

In Great Britain OctoberZ, 1-942 1 Claim.

This invention relates to improved apparatus for cutting and forming sheet metal and the like.

An object of the present invention is to provide a bench type machine adapted to shear sheet metal and the like, while at the same time, providing a frame on which may be mounted in compact form other devices for rolling or curling, shearing, ,jennying, punching, circle cuttin folding, flanging and seaming, swaging and so on. Such a device should be a great boon to amateur mechanics, model makers, and small workshops.

Another object of the invention is the provision of aguillotine-type shearing device consisting of a slidable inclined blade and a fixed blade, a rotary shaft having fulcrum cranks or lugs to enter openings in the inclined blade near its ends, and means for rotating the shaft to move the sliding blade over'the fixed blade. My arrangement also includes suitable means for guiding and gaging the metal to be sheared.

Other objects and advantages of m invention will be apparent from the accompanying drawings and specification, and the essential features will 'be set forth in the appended claim.

In the drawings,

Fig. 1 is a front elevation of the general assembly of the machine;

Fig. 2 is a plan view of the same;

Fig. 3 is a transverse vertical section on the line 33 of Fig. 1;

Fig. his a vertical section on the line 4-4 of Fig. 1;

Fig. 5 illustrates an alternative device for substitution in the machine shown in Figs. 1 to 3;

Fig. 6 is a vertical cross-section taken on the line 66 of Fig. 1;

Fig. 7 is a part of a sectional view corresponding to Fig. 3, but showing some elements of the machine in position at the end of a folding or flanging operation; while Fig. 8 is a further sectional View showing an alternative means for operating the punching tool.

In the example illustrated, the machine frame comprises two cast vertical end plates I, and a horizontal apron or skirt 2 adapted to be attached to the inner faces of the end plates by means not shown. The end plates have lateral feet 3 by which they may be secured to a bench or table.

Secured across the front of the machine, and secured to the end plates, is a front cover plate 29, on the inside of which is slidably mounted an :inclined guillotine cutter 30 having two openings 3| therein, one at each end. Ashaft 32 is journaled in the end plates I near their front ends, and carries two forwardly-extending cranks or lugs 33 which enter the holes 3| in the inclined guillotine cutter 38. Such shaft 32 is provided with a transverse hole 34 'at its outer end, to receive one end of a handle, by which it may :be rotated to lower the cutter 30 over a complemental cutting edge 35 formed on the front plate 2% along a through slot 36 therein. The handle is adapted to be pushed through the shaft to lie alongside the machine when the guillotine is not in use.

Extending forwardly from the lower part of the front plate 29 is a narrow horizontal table or leaf 3! whose upper face is level with the bottom edge of the slotE-ti in that plate.

Embracing the lower part of the machine is an open rectangular frame 38, the front of which lies across the front of the machine, the sides of which lie along the sides of the machine, and the back 33a of which extends through the machine opposite the slot 36. Screws 39 serve to hold this frame in any set position and the front bar of the frame carries a gauge llil slidable thereon and also angularly adjustable. This gauge includes a protractor scale 4|. The crossbar 3811 forms an adjustable abutment or limit stop for sheets of material passed through the slot 39 to be cut by the guillotine.

If a sheet or strip is to be sheared along a straight edge, it is passed through the slot 36, over the table 31, and, if the cut is to be parallel with the inner edge of the sheet, such inner edge is placed against the stop 38a, the frame 38 is brought forward so that the scale on its side arm indicates the correct position, whereupon the guillotine blade 30 is brought down by reason of the handle 41 being caused to rotate the shaft 32. If the sheared edge is to be at an angle to the sides of the workpiece, this may be determined by adjusting the protractor 4| against which the outer edge of the work-piece will contact.

As shown in the drawings, the above device may also provide a frame for the compact arrangement of devices for performing other operations on sheet metal. For instance, each end plate i may be slotted vertically at 4 to receive the trunnions 5 of a pair of rollers 6. At one end of the machine, meshed gear wheels 1 provide driving means for the rollers when the handle 8 is operated. A third roller ll may be mounted to therear of this pair of rollers so 3 that the three rollers together provide means for rolling or curling sheet metal.

A pair of rotary cutters I3 may be mounted on the outer ends of the rollers 6 to form a Jenny. A rod l6 carries a work-holder l8 to which sheet metal may be secured on a pivot l9 so as to be rotated while cutting to a circular profile in the Jenny l3.

Means for bending sheet metal may be provided by pivotally mounting in the end plates of the machine frame a hollow bar 20 which carries a bar 2| with a space between th bars to receive sheet metal for folding, flanging and like purposes. A round bar 22 mounted in the end plates serves as an anvil in the folding operations. A protractor 21 mounted on arm 26 forms an adjustable stop for the metal to be folded.

In a modification shown in Fig. 8, a bar. 54 may hold removable punches 55 adapted to register with openings in the skirt 2, and the bar 2| may be operated to drive the punch. Another punch 44 may be mounted on the front cover plate 29 in the block 42 which carries a springretracting spindle 43. Below this punch, the table 31 is fitted with a die plate 45 to cooperate with the punch.

Wire cutting means may also be provided by mounting on the front cover plate, adjacent the block 42, a rotatable stud 46 having holes 48 which may be brought into and out of register with holes in the adjacent support as the stud rotates. A wire passed through th holes 48 may be sheared by rotation of the stud 46.

One useful employment of the invention, as suggested above, is for the manufacture of sheet metal toys, the parts of which would be printed by transfers or the like on to sheets of metal and sold to the public ready for cutting out, working up, and connecting together with the use of th improved machine. The machine is also useful for amateur model makers as well as in workshops where sheet metal parts of various forms are required but not in suflicient demand to justify the expense of the several independent machines hitherto necessary.

What I claim is:

A sheet metal working machine of the type adapted to rest upon a table top and comprising a fram having parallel vertical end plates, a substantially horizontal apron extending between said end plates above and parallel to said table top, a vertically positioned front plate connecting said end plates forwardly of said apron, there being a slotted opening through the lower portion of said front plate through which to pass a sheet of metal, a horizontally extending table leaf on the forward side of said front plate at the level of said slotted opening, guillotine shear blade means mounted on said front plate for reciprocation adjacent. said slotted opening, whereby sheet metal supported on said table leaf and passed through said opening and beneath said apron may be sheared by said guillotine.

FRANK EDGAR WARING.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 655,597 Bates Aug. 7, 1900 2,031,604 Ingels Feb. 25, 1936 1,319,798 Satterlee Oct. 28, 1919 306,562 Vincent Oct. 14, 1884 691,234 Bowen Jan. 14, 1902 966,689 Johnson Aug. 9, 1910 377,780 Sagendorph Feb. 14, 1888 803,660 Bertsch Nov. 7, 1905 1,918,104 Hook July 11, 1933 2,260,188 Leslie Oct. 21, 1941 1,611,960 Thomas Dec. 28, 1926 858,066 Fehr June 25, 1907 1,658,498 Rose Feb. 7, 1928 836,020 Ecaubert Nov. 13, 1906 290,433 Jordan Dec. 18, 1883 FOREIGN PATENTS Number Country Date 603,429 German Sept. 29, 1934 212,265 German July 28, 1909

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