Патент USA US2407093код для вставки
Sept- 3, 1946- H. H. MOHAUPT 2,407,093 METHOD AND APPARATUS FOR CUTTING OR PUNGHING SHEET MATERIAL Filed May 21, 1942 . 13 H. H. Mo/mupf, w, r W 2,401,093 Patented Sept. 3, 1945 , "UNITED STATES PATENT ol-"rics METHOD AND APPARATUS FOR CUTTING OR ' PUNCHING SHEET MATERIAL Henry H. Mohaupt, Washington, D. 0., assignor to Societe Anonyme de Gestion et d’Exploita tion de Brevets, Switzerland 2'“; - Application May 21, 1942, Serial No. 443,958 15 Claims. 1 This invention relates to a simple and prac tical method and apparatus for cutting or punch; ing sheet or plate material, usually of a ferrous character such as iron or steel. > One of the objects of the present invention is to provide an improved relatively small, compact and self-contained article especially adapted for cutting or punching holes in sheet metal. ‘ A further object is to provide an article of the (01. 164-45) I 2 tion to the other parts when in the position shown _ in Figs. 1 or 2. This cutter or punch 8 is of any suitable metal, and may be mild steel,‘ which may be easily and quickly deformed and collapsed un der'the tremendous pressure, heat and action of the explosive indicated at H! and positioned in the upper part of- the container 6. The'explosive, which may be of any suitable kind, is preferably a relatively small quantity of TNT, or any other above character which may be inexpensively 10 powerful explosive, which is detonated or ignited by any suitable means such as a detonator or cap manufactured and assembled, andwhich will be I . reliable and safein use and operation in proper The term “detonating” herein used in the spec hands. i?cation and claims is to be construed broadly A further object is to provide an article of as including any means or method of initiating the above character requiring little or no external 15 the action of the explosive within the container. means for operating the same at the place The upper and lower ends of the container 6 desired. may be closed, if desired, as by means of thin A further object is to provide an improved cover plates l2 and I3. These can be of ?ber or method of quickly cutting or punching holes in very thin sheet metal and are used primarily to 20 sheet metal or the like. protect the explosive against moisture and dis Other objects will be in part obvious and in placement. part hereinafter pointed out in connection with It will be noted particularly that the cutter the following analysis of this invention wherein or punch 8 has a frictional ?t with respect to is illustrated an embodiment of the invention in the inner wall of the container 6 and the guide 25 1 and in certain cases may be held in place by its detail. ' In the drawing: adhesion to the explosive Ill placed thereabove, Fig. 1 is a semi-diagrammatic perspective view which in certain cases is melted and either poured of the device in operative position upon a sheet in the top, or the container may be inverted and, of material to be punched; ~ while the explosive is still in a semi-plastic con Fig. 2 is a vertical longitudinal sectional view 30 dition, the cylinder ‘I and cutter 8 may be pressed of the complete device; and downwardly into the semi-molten or plastic mass. Fig. 3 is a sectional plan view taken substan Of course, if desired shear pins or the like, such tially on the line 3-3 of Fig. 2 with. parts re as indicated at 9 may be used in order to prevent moved for the sake of clearness. relative movement of the parts if handled Referring now to the drawing in detail, 5 in 35 roughly. ‘ dicates diagrammatically a sheet of material This cutter 8 for the size hereinafter described, through which a hole is to be punched or cut by is preferably spaced from the botto T3 of the means of the device shown positioned thereon or container 6 a distance substantially equal to the in section in Fig. 2. This device comprises a con 7 tainer 6 which, for cheapness and simplicity of 40 diameter of the case and, being held in position largely by its frictional engagement with its co manufacture, is preferably made cylindrical in acting parts, is otherwise free to move. down form with a substantially smooth unobstructed inner surface, having a height slightly greater wardly with respect to the smooth substantially unobstructed inner surface of the container. than its diameter. While shown. cylindrical, it of course could be a polygon of any desired num 45 However, when the explosive charge is detonated, the extremely rapid formation of the gases forces ber of sides, but such construction is less desir- ’ the cutter downwardly at very high speed and at able because of the dimculty of manufacture. the same time causes the two sides M of the v Centrally disposed within this cylinder is a guide ring to move into intimate engagement.’ The in member ‘I which may be a solid bar or a tube tense heat generated li ally fuses the two sides as desired, which is concentrically disposed with of the V into one solid, constituting a sub relation to the container 5 and is for the purpose stantial. cutting or pimching tool. The cutter of positioning and guiding a cutter or punch 8. thus formed thereby is driven downwardly against This cutter or punch as herein shown is annular the plate 5 at tremendous speed and great force in plan view and V-shaped on any radius,- the open part of the v. facing downwardly with rela 55 and will by reason of items and inertia instantly I 3 - 2,407,093 ,cut or'punchanopenmg in the plate 5, conform ierpreted as ing to'the shape of the cutter when the. rela- ’ ~ tive size of the device and, thickness of the plate sense. 1 will permit. It is'to be noted, however, that the ' diameter of the hole is actually a little larger - thanthe diameter of the container, this being due '" to an outward movement of the cutter and ex I claim: illustrative and not in a limiting I ., 1. A self-contained cutter or punch for sheet material comprising a container adapted to be positioned adjacent the plate to be cut or punched, a collapsible concave tool within the container spaced from the plate a material distance, an explosive within the container and on the other shown cuts a circular opening in the plate and 10 side of said tool with respect to the plate where the central disc falls clear on operation. Thus the by, on detonating the explosive, the tool is freed cutter is far more effective and e?lcient in pene from the container by collapsing its sides and trating qualities than were the explosive force to driven into said sheet. be applied to a solid punch acting on the entire 2. A cutter or punch as set forth in claim 1, in area of the opening to be out. 15 which the tool is V-shaped in cross-section. pansion ‘of the bottom of LL the container. The cutter being of concave ring form as herein In other words, if the container G'is, say, four inches in inside diameter, the cutter 8 should be 3. A cutter or punch as set forth in claim 1, in . which said tool is of ring-form and V-shaped in about four inches from the bottom and will punch cross-section on any radius of the ring. an opening or circle through a mild steel plate 4. A cutter or punch as set forth in claim 1, in . about % inch in thickness and about 4% inches 20 which said tool is of ring-form and V-shaped in in diameter. Accordingly, the size of the con cross-section on any radius of the ring, the open tainer may be selected according to the thickness end of the V facing the plate to be perforated and of the plate and the hole to be punched. The the point of the V adjacent the explosive. ' amount of explosive‘ may be varied as desired. I 5. A substantially cylindrical container of a Thus a four inch hole on a. quarter inch stock 25 height slightly in excess of its diameter, the half requires less explosive. . . adjacent the plate to be out being free and un Itfrequently happens in engineering, mining obstructed, a tool inthe container positioned near and construction problems, as well as in other the middle of the container and held in position cases, that it is necessary to quickly force an largely by frictional engagement with the con opening through a metal plate or the like, when tainer, and an explosive in the container between an acetylene torch or boring machine, or other , the tool and the outer end of thecontainer, said complicated apparatus, is not available. tool being V-shaped in cross-section. ' ' ~ - . ' The present device is directed to a complete, 6. A substantially cylindrical containerv of a compact and self-contained mechanism which height slightly in excess of its diameter, the half may be easily and quickly conveyed, placed or 35 adjacent the plate to be out being free and unob positioned with respect to the plate to be per structed, a tool in the container positioned near forated and actuated to accomplish the penetra the middle of the container and held in position tion, all in a very short space of time. The action largely by frictional engagement with the con of the device-is limited to a very speci?c zone of tainer, and an explosive in the container between the obstacle. By way of example, a building may 40 the tool and the outer end of the container, said be on fire and sections of the building protected tool being annular in form and V-shaped in from other sections by means of ?at steel ?re cross-section on any radius whereby on detonating doors either in the walls or ?oor which are pos the explosive the tool is deformed by bringing the sibly locked. or otherwise secured against move sides of the V into contact and freed from con ment. Assuming that ?remen desire to get a tact with the sides of the container and driven stream of water to such burning part of the through the plate. ' building, or even through the floor of the build 7. A container of a height or length slightly in ing, one of these small, portable, self-contained excess of its transverse dimension and having a mechanisms, say three or four inches in diameter, smooth internal surface, a centrally disposed may be placed against the sheet material to be 50 guide within said container, an annular tool posi perforated and ignited by a fuse, detonator or tioned in the container and about the guide and even a ?ashlight battery I5, to almost instantly held in position largely by its frictional contact cut or punch the desired hole'thro-ugh the door or with the guide and the inner surface of the con— ?oor, after which a hose could Ire inserted tainer and spaced from the plate to be cut a dis through the opening and the desired results ac 55 tance substantially equal to the diameter of the complished. Containers of chemical substances container, and an explosive adjacent the tool canalso be pushed or projected through the aper and on'its opposite side from the plate to be per ture thus produced. forated whereby on detonating the explosive the It is thus seen that the present invention con tool is deformed and freed from contact with the templates a simple and practical mechanism as sides of the container and driven as a cutting ring well as a. method for quickly cutting or punching 60 into the plate. holes through sheet material and is well adapted 8. An apparatus as set forth in claim 7 in which to accomplish, among others, all of the objects the tool is V-shaped in cross-section taken on and advantages herein set forth. any radius. In using such terms as “upper,” “lower,” "bot 65 9. An apparatus as set forth in claim 7 in which tom,” etc., these are to be interpreted as being the tool is V-shaped in cross-section taken on relative or in relation to the drawings showing one any radius and the open end of the V faces the of various possible embodiments or applications. plate to be cut. Obviously the-device could be applied to a verti 10. A device of the character described com cal surface such as a sheet metal door or the like. prising a substantially cylindrical container, the As many changes could be made in carrying out 70 lower part of which provides a free and unob the above constructions without departing from structed bore, a cutting tool within the bore and the scope of the invention, it is intended that all positioned a material distance up said unob matter contained in the above7 description or structed bore, said cutting tool comprising a con shown in the accompanying drawing shall be in‘ 75 cave member facing downwardly, and explosive 2,407,093 material on the upper side of said concave mem-v ber adapted to collapse said concave cutter and weld the sides thereof by the heat of the explosion into a substantially solid cutting tool adapted to be driven through the plate by the force of the explosive. 11. A device of the character set forth in claimv punching an opening insheet metal or the like comprising a container having an explosive and detonator, and a collapsible concave cutter or punch ring in the proximity of the sheet to be perforated, with the concave surface of the cut ter facing the sheet metal and spaced at a mate rial distance therefrom, whereby on detonating 10 in which the cutter is of annular form to make the explosive the sides of themtool are collapsed and fused into substantially o / solid mass with a a circular opening and disc-shaped cutting. 12. A device of the character described, com 10 sharp cutting edge adapted to be driven through the sheet to be cut or punched. prising a substantially cylindrical container with 15. The herein described method of cutting or an inverted concave cutting tool positioned there punching out a disc in sheet metal or the like, in and embedded in and held in position by an comprising the steps of positioning a. container explosive on its upper side, the lower part of said container providing a free and unobstructed bore 15 having an explosive'and a collapsible inverted " concave cutter ring adjacent the plate to be cut for said tool, and means for detonating said ex with the cutter ring freely spaced a material dis plosive thereby to drive said cutter downwardly tance therefrom, and detonating the explosive to with great velocity and simultaneously fuse and collapse its sides to form a substantially solid cut collapse the ring and fuse the ‘sides of the con ting member. 20 cave cutter ring by the heat of explosion into one substantially solid mass to drive the ring through 13. A device as set forth in claim 12 in which the plate and to cut a disc out of the plate. the cutter is of ring form thereby to make a circu lar cutting with a central solid disc. HENRY H. MOHAUPT. 14. The herein described tool for cutting or .