US1782641A - Machine for flanging plate disks - Google Patents

Description

NM 25, 1930. o. WILD ET AL 1,782,641

} MACHINE FOR FLANGING PLATE DISKS Filed July so, 1928 2 Sheets-Sheet i Nov. 25, 1930. o. WILD ET AL 1,782,641

MACHINE FOR FLANGING PLATE 'DISKS Filed July :50, 1928 2 Shoots-Sheet 2 Patented Nov. 25, 1930.

TED S TE PATENT oFFicEl-s o'r'ro WILD AND Louis WILD, on MURI, SWITZERLANDY 7 e MACHINEFOB FLANGING. PLATE nisxs Application filed Iiily so, 1928, Serial No.

Inorder to flange a disk of sheet metal it is old to'clamp the disk centrally and to cause axisotthe sheet metal disk. In the method heretot'oreapplied thebendin'g of the flange portion around orv behind the rollerworking on theinside of the flange causes considerable difficulties. The Working eflect on the sheet riletalfduring the flingin process begins within the rounded portion ofthe flange and ends in the wall ofthe latter. Naturally the circumferential velocity of the above mentioned'roller is much larger onthe extreme edge of thesaid roller than itisfat the inner end of its rounded portion. Therefore, a slip between the sheet metal disk and individual i I partsfof the roller is una-voidable. 'Accord ing to experience the saidfslip and the differencebetween the extreme and the innermost edges of the roundedportion of the said roller are to be kept within certain limits in order to avoid disturbances and scraps.

qFor many purposes flanged sheet metal disks having a relatively broad cylindrical portion are required, which for reasons cited above cannot be made by the known method. r

The forming of flanges haying abroad cylin drical portion on sheet' metal di skseven causes difficulties when forging presses are nsech Moreoveriiorging presses, as is well known, require much more attention, are costly and take up more room than flange. rolling machines and besides showthe great drawback that for each. diameter of sheet metal disks to be flanged special-dies and punches are required. i f L V 7 It is further oldto mount a sheet metaldisk rotatable. about its centre while otherwiseit V remains stationary andto work" it by means of rollers which besides being adjustable towards each other, duringthe flanging operation canbe displacedangularly towards the disk. ,This working method has the'great disadvantage thatth'e drive of the rollers cannot be arranged stationary and owingto,

296,173, and in German June 20, 1925.

"the ustability" of the rollers is of a very compllcated nature, especially if pieces of sheet metal treated. e

The present invention isac'lapted to overof darge thickness are to; be

.fcom e; these difficulties inthzit the position of the rollers during the \flanging operation besides being adjustable remains unchanged vice for the sheet metal disk is angularly displaced. At the-beginning the flanging and the cylindrical wall ottheflange is worked in the direction from inside to outside. Afterwards the inner part of the curved portion of the fiang eis actedupon irom outsideto inside, whereby the flange is given its final position relatively to the sheet metal disk.

Figs. 1-6 refer to a first constructionalex ample of a flanging machine according to the present invention.-

and'thatthe "central rotatable supporting de- Referring to the drawings ,in which like parts are similarly designated Figure 3 illustrates a detailofthemachine; i Figure 4E isa plan, Fig. 5, is a side elevation and Fig. 6 an endelevationof a machine e1n' bodying our invention 7 Fig. 7 i'sa section of one of the rolls. Figs. 8, 9, and 10 show mechanism for supporting a dished disk during flanging; Fig. 11 isawfront elevation; Fig. 12, a side elevation and V n Fig. 13 a plan ofthe machine arranged vertically. Y e n The sheet metal disk is mounted according to Fig. 1. At the beginning of rollingthe central rotatable connection is kept unchanged and primarily the extreme part of the rounded portion and the cylindrical wall of the flange are treated by approachingthe.

Figures and 9. illustrate the manner of v a presenting a disk to the'flanging rollers;

Ill

roller 16 toward roller 6. During the further rolling action the central rotatable connection of the sheet metal disk is moved upwards (as shown in Fig. 2) whereby as may be seen the inner part of the rounded portion is made and the depending Hange is given its final position relatively to the sheet metal disk. The fundamental differences in reference to the usual method are evident. In the radial direction the outer part of the rounded portion as well as the cylindrical wall of the flange are formed in the outward direction and the inner part of the rounded portion in the inward direction. The roller 6 is divided into two parts A and B, one rotatable with respect to the other. Consequently much larger flanges can be rolled. than with the usual method. In fact already on the first application of the method stiff sheet metal plates of Thomas Steel of a thickness of 12 m/m. anda diameter of from 1 to 4 meters were provided with a depending flange having a rounded portion of 120 m/m. radius and a cylindrical portion of a width of 80 m/m.

The machine shown in Figs. 3-6 has two standards I and II which are interconnected by strong bracings 3. In the foot of the standard'I, the one hearing t of a shaft 5 is placed, the second bearing 4 of which is planted on a footing C. The Hanging roller t is secured to one overhanging end of the shaft 5. Between the standards I and II the pinion 7 is mounted on the shaft 5 and between the standard II and the footing C the gear wheel 8. The latter meshes with a pinion 9 mounted on a transmission shaft 10 which is operative connection with a second transmission shaft by means of gear wheels, which second transmission shaft carries a pulley 11 driven from a motor by means of a belt. Above the shaft 5 the shaft is mounted in bearings 12 and 13. The shaft 15 carries on its overhanging end the Hanging roller 16 and between the standards I and II the pinion 1? which is of the same diameter as the pinion T and meshes with the latter. The bearing 12 isfco nected to a sliding block 20 which is guided in the standard I and suspended from a spindle 21, for which the hub of a worm wheel 22 serves as a nut. The worm wheel 22 is rotatably mounted on. the head piece 'of thestandard I on which the shaft 23 with theworni 25 and the hand wheel 24 are fur her. l aeu tei The bearing 13 of the shaft 15 of the flanging roller is carried by arm which is connected to a shaft mounted in supports on the standard IT. The shaft 31 placed centrally above the gear wheel 17. lVhen the bearing 12 pulled upwards the pinions T and 17 remain in proper operatii 'e connection. For the purpose of displacing the Hangs' tell r L re ati e y o he r ler'fi a s i axial direction a bush lllis secured to the shaft la; in wh ch ash, he Shaf sear in the bearing 13 and the two ends of which that project beyond the bearing 13 are provided with screw thread. With these screw threads nuts 11 cooperate, which press from both sides on the bearing 13. If one of these nuts 41 is loosened and the other one tightsued in the same direction the shaft 15 is shifted axially in either direction and the Hanging roller 16 together with it.

In front of the standard I a table built up of steel sections is placed which carries a supporting stud 51 rotatable about its center and two guide rollers 52. The supporting stud 51 is displaceable on two bars 53 of the frame 50 which extend in the direction of the axes of the Hanging rollers 6, 16 and is adapted to be secured in any position thereon.

To the standard I two heavy angle irons 55 are secured which carry on their free legs pins 56 from which the frame of the table 50 is suspended by means of tie plates 57 The axes of the two pins 56 lie in a line and this line as shown in Figs. 4-6 passes through the gap between the two Hanging rollers 6 and 16. By choosing an appropriate position for the fulcrum pins 56 about which the table tilts the central rotatable supporting stud upon tilting of the table is guided conformably to the shortening of the radius which takes place when forming flanges. On the other end of the frame of the table 50 a ring 60 is provided for attaching a tie member thereto bymeans of which the table can be tilted upwards about the axis g g provided by the pins 56. The table 50 has guide rollers 52 which participate in the displacement of the central rotatable supporting device of the sheet metal disk and guide the rim of the sheet metal disk in the working range of the rollers 6 and 16.

The rollers 6 and 16 are arranged so as to be easily exchangeable. If necessary rollers of different profiles may be used in the same machine. V

A part of the roller 6 may preferably be constructed in the manner of a so called idler as shown in Fig. 7; the part A of the roller is keyed on to the shaft 5, the part B of the roller is ournaled on the shaft by means of a bronze bush D to rotate freely thereon. Therefore that part of the Hanging roller which Works the outside of the depending Hange acts within the range of the interior part of the rounded portion in the manner of a driven roller and within the range of the exterior part and of the wall of the rounded portion in the manner of an idler.

The manner of working of the machine is as follows:

' The shaft 15 by means of the nuts 41 is adjusted so that the upper Hanging roller 16 is separated from the lower Hanging roller 6 by the thickness of the piece to be worked. The able Q is br ht inteh qrizpat l p s T tion and the central rotatable supporting stud 51 is placed on the same in the position corresponding to the diameter of the piece to be worked. After the roller 16 has been raised by moving the sliding block 20 upwards the disk which has been previously cut to correspond to the size of the piece to be worked and which has been provided with i a central hole is slid, on the stud 51 of the central rotatable supporting stud. Now the guide rollers 52 are adjusted in height so that the edge of the sheet metal disk bears on the rearward extreme circumference of the flanging roller 6. After the machine is set in motion the upper fianging roller 16 is pressed on to the edge of the sheet metal disk by screwing down the sliding block 20 and is gradually moved downwards until a gap is left between the upper an'dythe lower fianging roller of a width which is equal to the thickness of metal of the piece to be Then the exterior and'the middle part of i the depending flange to be formed is finished.

. turning axis may be used. a 1 40 Now the table is slowly raised by means of a pulling member 70, forexample, a chain of a tackle suspended from the ceiling of the working room so that the edge of the sheet metal disk also bears on the front'side of p the flanging profile of the flanging roller 16.

This is continued until the interior portion of the sheet metal disk has assumed a certain angle in reference to the wall of the flange which is required for the sheet metal disk of the piece of work to be produced for instance a right angle.

Instead of a draw member'a jack or any arrangement for turning the'table about the While in the above the forming of flanges around plain sheet metal disks has been described by way of example, Figs. 8 -11 illustrate the forming of a flange around an embossed sheet metal disk, a so called dished boiler end head.

a i The construction and the manner of oper-- ation of the machine are the same as per Figs. 36 with the difference that the central rotatable supporting device :51 is secured to a support which is adapted to be moved towards the flanging rollers 6 and 16 which support is keyed on toa pivotable pin 76 and is mounted on a slide 77. The central rotatable supporting stud 51 can be manually adjusted corresponding to the. angle of tangent of the respective curvatureof the disk by means of a hand wheel 78, a worm 79 and a worm wheel 80. The slide 77 is adapted to be displaced on two bars 53 of the frame 50 extending towards the flanging rollers 6, 16 and to be fixed thereon in any desired position.

While in theabove ihe forming of flanges on sheet metal disks by means of flanging rollers with horizontal axles wasdescribed,

.dlSlC'iIlliliS center portion for applying-the, central rotatable supporting device is con cerned the respective perforations have to be plugged afterwards which preferablyis done of ifiangesion sheet metal disks of' soft ma- :terial or in red hot state naturallyi' is atampl'esthe disks consist of stiff materialin coldstate i i .1. i a, it

it with at least one tool;

the Figsi 11, 1 2 and 13 illustrate-a machine .for forming flanges by f roller-31m V gvertical axlesy i a i i As far as the drilling ofthe sheetmetal by welding. It will be clear that-the forming tained more readily and in a shorter time than if as n the prevlously descrlbed exa a I so l Thesame mounting of the sheet metal disk in theimachine adapted fonforming flanges V also enables the edge of the disk to be trimmed so that an edge suitable for welding or caulking can be milled thereon, machining i1 The 'tool or tools respectively are fixed in one or more supports ..(as atfllOO inl ig. 4) which are mounted either on the frame of the flan'ging rollers 'or on the table of the central rotatable con nection or on both.

1 i We claim:

1. In a machine for fianging plate disks, in combination, two flanging rollers adapted to beadjusted in their distance from each other, one of said rollers having. the shape of a bulb and a profilecorresponding to the it inside of the curved portion and of the cylindricalwall of the flange, the opposite roller having the profile of the outside of the cylindrical wall and of one half of the outside of the curved portion of the depending flange, the second mentioned rollerconsisting of a" part which acts in the manner of "a driving roller and another part which acts in the a manner of an idler, supporting means for r0- tatably holding the center portion of the plate disk, and means for angularly displacing said supporting means along an arc having its centerbetween said rollers.

'2. In a machine for flanging plate disks,in combinatiomtwo fianging rollers adaptedto V be adjusted in their distance from each other,

supporting means for rotatably holding the center portion of the plate disk, a table on 1 5- of the radiusof the disk during the flanging 1 operation. v i

3. In a machine for flanging plate disks, in combination, two flanging rollers adapted to be adjusted in their distance from each other,

a frame in which said rollers are mounted,

supporting means for rotatably holding the center portion of the plate disk, a table on which said supporting means are displaceably mounted, said table being journalled on said frame about an axle located between said rollers at right angles to the axes of the latter, and including fulcrum pins defining the axis about which the table is angularly displaced and arranged eccentric to the axis about which the flange is curved to take into accountthe shortening of the radius of the disk during flanging.

4. In a machine for flanging plate disks, in combination, two fianging rollers adapted to be adjusted in their distance from each other, a frame in which said rollers are mounted, supporting means for rotatably holding the center port-ion of the plate disk, a table on which said supporting means are displaceably mounted, said table being; journalled on said frame about an axle located between said rollers at right angles to the axes of the latter, and means to adjust said journals between table and frame to take into account different shortenings of the radius when utilizing rollers of a different profile.

In testimony whereof we have signed our names to this specification.

OTTO WILD. LOUIS WILD.

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