Патент USA US2410676код для вставки
Nov. 5, 1946. J. s. NIELSEN 2,410,676 APPARATUS FOR FORMING SHEET METAL ‘ Filed Oct. 16, 1943 James S, N/e/sen Patented Nov, 5, l ‘ , 2,410,676 .UN'ITED' STATES ' 12,410,875 I . APPARATUS FOR FOG SHEET ‘EAL lanes 8. Nielsen, Stow, @hlo, assignor to its - "i year Aircraft Got-partition, Akron, Ohio, a-cor ‘porationoi Dela 1-: Application October iwitdt, Serial No. 506,474 I 5 Claims. - (Cl. E This invention relates to apparatus for form! ing sheetmetal, and, moreparticularly, is con- _ cerned with improved apparatus for use in con junction with rubber platen presses wherein sheet metal parts are ?anged around or shaped over forming-dies. » 4), ‘ . - ‘ It is old and well known to employ so-called rubber platen presses for shaping sheet metal. Apparatus of this type possesses the important edge, and means for e?ecting relative movement between the shaping means and the support to progressively bend the overhanging edge around the support with a progressive slipping oi’ the overhanging edge out from between the shaping means. For a better understanding of the invention, reference should be had to the accompanying drawing, wherein Figure 1 is a vertical cross-sec _ characteristic that only one die is needed, instead 10 tional view through typical apparatus incorpo of .a mating male and female die, with the rub rating the invention (with the sectional view be ing taken on line i~+l of Figure 2-) ; and Figure 2 sure over the entire area of a piece of sheet metal is a plane view of a portion of the apparatus as positioned over the forming die. However, in taken substantially on line 2-2 of Figure 1. forming ?anges on sheet metal by apparatus of 16 Having speci?c reference to the drawing, the this type, and, speci?cally, where such ?anges numeral l0 indicates generally a bed or platen are curved or contoured, as is so often the case, adapted to mount thereon a support or die‘ it it has usually been necessary to partially form for a piece of sheet metal It, with the sheet the sheet metal with the rubber platen apparatus, metal being supported so as to have an edge and follow this forming operation with extensive .20 portion overhanging the die or support It. The and laborious hand-finishing operations or other overhanging edge of the sheet metal it is adapted machine-?nishing operations. to be adjustably gripped by contoured shaping It is the general object of this invention to‘ means, indicated as a whole by the numeral it, avoid and overcome the foregoing and other ob which conveniently take the form, as illustrated, jections to and dlmculties of known rubber 25 of a pair of opposed metal shoes, draw-blocks, or platen-press apparatus and the like, by the pro dies in the form of plates it and I8, having one vision of improved means for facilitating form or more aligning pins 20. The plates it and it ing curved and contoured edges on sheet metal of the shaping means are adjustably secured to in a single rubber pressing operation. gether by any suitable means, such as threaded Another object of the invention is the provi 30 studs 22, secured in the plate It, extending sion of improved apparatus of relatively inex through holes in the plate it, and receiving ber platen serving to apply relatively high pres pensive, readily operated'character which facil itates forming contoured ?anges and'the like on sheet metal during a rubber platen-press sheet thumb nuts 2%. . Some means are provided for mounting the shaping means It so that the metal-gripping metal-forming operation, 35 edges thereof can have relative movement with Another object of the invention is the provi respect to the support 82 for the sheet metal. sion of apparatus of the character described and One particularly practical way of achieving the wherein an overhanging sheet metal edge is desired result is to form the plate member It of gripped by adjustably actuated clamping plates a wedge shape and with the plate tapering to a to provide a progressive bending and stretching 40 relatively thin edge adjacent the die or support of the sheet metal edge and a progressive slipping l2. When the plate It is shaped in this way. of the sheet metal edge out‘ from between the the contoured shaping means I5 have bodily clamping means. movement as a whole of pivoting character from The foregoing objects of the invention, and‘ the full-line-position shown to beyond the dot other objects which will become apparent as the 45 ted-line position shown. The movement of the description proceeds, are achieved by the provi contoured shaping means from the full to the sion of a method for forming sheet metal which dotted-line position is achieved by ‘any desired includes the steps of gripping an edge to bend means, for example by the use of a rubber platen progressively and simultaneously to stretch the including a rubber body 30 supported in the metal edge to the desired contour. The apparatus of 50 platen member 82. The rubber body 30 not the invention includes in combination, means for only serves to force the sheet metal 14 into shaped supporting sheet metal with an overhanging edge, contact with the die or support l2 but also serves a pair of contoured shaping means, means for to-apply pressure to the top plate It of the con adjustably clamping the shaping means against toured shaping means I 5, and this pressure causes each other on opposite sides of the overhanging the contoured shaping means I! to tilt with a 9,410,070 .plvotingactioni’romthemll-linetoandbeyond . 4 During the movement or the contoured shap ing means I‘ from the rull-line position to and beyond the dotted-line position, the overhanging edge oi’ the sheet metal gripped by the contoured shaping means progressively slips out from be gripping means, independent of the overall con ?guration oi the main die,- used only adjacent said curved die portions and coniorming to the contours thereof, the outer bottom portion of said gripping means being in sliding and tilting contact with said die support and its inner por tion being in slidable and adjustable clamping tween the shaping means to cause a progressive engagement with the metal sheet, so that the the dotted-line Politico. _' straight edge portions oi said sheet are ?anged bending and a simultaneous progressive stretch in! ‘of the overhanging sheet metal edge, so that 10 directly by the rubber platen, but which acts upon the curved portions by means of said gripping the edge oi’ the sheet metal is contoured and shaped to the particular form desired. From means in order to obtain smooth wrinkleless the drawing it will be recognized that a longi tudinally curved ?ange can be formed on the 3. Apparatus for forming sheet metal, com-_ ?anges. ‘ - ' sheet metal edge, and the ?ange can extend at 15 prising a die support, a die resting on said sup port and having straight or substantially straight any desired angle with respect to the main body _ oi’ the sheet metal. as well as curved circumferential contour por tions. said die carrying the sheet to be formed From the foregoing, it will be recognized that with its edges overhanging, rubber platen means - the objects of the invention have been achieved by the provision of simpli?ed and improved 20 movable to and from the die, and- a. supplemen tary, relatively short, tiltable gripping die in means and method for forming sheet metal and dependent of the overall con?guration oi the particularly for shaping curved and contoured main die and adjustable for various sheet thick ?anges on sheet metal parts during a rubber platen-pressing operation. The ?anges are nesses, in sliding contact with said die support formed to the desired shapes and contours sub 25 and in slidable engagement with only the curved edge portions of the metal sheet in order to pre stantially without spring-back and to substan vent wrinkling of said curved portions. tially eliminate the necessity for subsequent hand-forming or additional shaping operations. 4. Apparatus for forming sheet metal, com-, prising a die support, a die resting on said support 01 course, any number of contoured shaping means, such as particularly illustrated, can be '30 and having straight or substantially straight as well as curved circumferential contour portions, employed, and the contour oi’ the shaping means said die carrying the sheet to be formed with its can be widely varied to suit any speci?c re edges overhanging, rubber platen means movable quired shaping operation. to and from the die, and at least one supplemen While, in accordance with the patent statutes, the invention has been speci?cally illustrated 35 tary ?anging die independent of the overall con ?guration of the main die in cooperation with and described, it will be understood that the in ‘said ?rst mentioned die and said rubber platen vention is not limited thereto or thereby, but means for ?anging only the curved portions of that the scope of the invention is de?ned in the said metal sheet, said supplementary die being appended claims. I claim: . 40 wedge-shaped in cross section with its thin por tion gripping the sheet edge and with its wide 1. Apparatus for shaping sheet metal and in portion resting in sliding and tilting relation on cluding a die support, a die on the support, said said die support. die carrying and positioning the sheet with an 5. Apparatus for forming sheet metal, com overhanging edge, multi-part contoured shaping means adapted to grip the overhanging edge 0! 45 prising a die support, a die resting on said sup port and having straight or substantially straight the sheet, the lowermost part of said shaping as ‘well as curved circumferential contour por means having a wedge shape in vertical section tions, said die carrying the sheet to be formed and resting loosely on the die support in pivotal with its edges overhanging, rubber platen means relation therewith, said shaping means being pivotally supported on the die support at a point 60 movable to and from the die, and a separate supplementary ?anging die in cooperation with spaced from the die and to the underside of the the die and said rubber platen means, said ?ang plane of the overhanging edge, a rubber block, ing die including means for clamping with ad and means for forcing the rubber block against ‘justable pressure on the overhanging edge of the upper surface of the sheet to form it into the die and simultaneouly to rock the shaping means 65 the sheet adjacent the curved portions of the die, that portion of the ?anging die remote from about'the pivotal support progressively to bend the sheet resting in tilting and sliding relation and stretch the overhanging edge. ‘ on the die support, so that movement of the rub 2. Apparatus for forming sheet metal, com ber platen means against the die will ?ange the prising a die support, a die resting on said sup port and having straight or substantially straight 60 overhanging sheet edge against the straight por tions of the die and will simultaneously move as well as curved circumferential contour por the ?anging die with a tilting and wiping move tions, said die carrying the sheet to be formed ment to form a curved ?ange in the sheet with with its edges overhanging, rubber platen means out wrinkling the curved ?ange. movable to and from the die, and supplementary .~ ‘ JAMES S. NIEISEN.