US1691496A - Press for drawing sheet metal - Google Patents

Description

Patented Nov. 13, 192s.- l e 7 1,691,496 7 a U NITED STATES PATENT -orr c E... i 7 CHARLES l'OSEPH RHODES; WAKE FIE 'IiD; v

rnnss non DRAWING snnn'r lVIETALi Application filed June 24, 1927, Serial No. 201,185, and in Great-Britain February 12, 1927.

This invention relates to presses for drawthe degree of compression upon the buffer 12. ing sheet metal) Passing freely through the tubular rod 8 In drawing sheet-metal ware such as vesand through thebase of the die isa rod 13, scls or receptacles of considerable depth, it the upper end of which is screw-threaded and 60 has been proposed-toeifect the drawing ina is attached to the forming block 14 of the plurality of stages, usually two, for which l Wer die. 1 operations two pressure rings have been em- The rod '13 a'tits lower end is provided with ployed one disposed within the other,said ahead 15 to which are connected'the inner rings being controlled by cam or other suitends of levers'16 pivotally supported by the ably operated mechanism, suitable provision lugs 10'of bracket 9. The outer ends of the being made whereby'the said rings are resililevers are pivotally connectedto the collars ently supported in order'to compensate for 16. on thelower ends of vertically disposed diiferences inthe thickness of the metal which rods 17 pivotallyjsupportcd at their upper may be initially present or such as maybe ends in lugs 18 upon the undersideof the produced during the drawing operation. table 7. The rods 17 are screw-threaded at The present invention has for its object their lower ends where they support thecolcertain improvements whereby not only may lars 16, said collars being adjustably secured the construction of the press be simplified to the said rods by nuts'19. but bodies of considerable depth may be 20 indicates the ramof'the machine and 21 20 drawn in one operation. 7 the upper die. i

According to the present invention'provi- The operation of the machine" is as folsion is made whereby the forming block or l0Ws :As the ram descends and the upper die plug of the lower die, which has hitherto been .21 causes the draw-ring 5 to be depressed the stationary during the drawing operation; has table 7 will be depressed compressing the 25 imparted to it motion towards the upper die. buffer 12, the bracket 9 remaining stationary. In order thattheinvention may bethe bet- The downward movement of the table 7 ter understood drawings are appended'in causes the rods 17 to operate the levers 16', which which acting upon the-rod 13 causethe same Fig. lis a front view of a press embodying to move upwards whereby the plug 14 is also the present invention; I moved upwards.

Fig. 2 is a section on line of Fig. 1, The movement offithe'plug in the manner and i 1 described relieves the buffer 12-ofexcessive Fig. 3 is a section on line 3-3 of F ig. 2. Compression under which .it would, during 7 Referring to the accompanying drawings the later sta'ges-of the drawing operation, op- 90 in which only such parts areidentified as are pose a substantially solid resistance to the necessary for the proper understanding of movement of the upper die causingthemetal the invention. 1 indicates thcframe of the acted upon to tear. l/Vith the present arpress and 2 the table to which is secured a rangement the desired resiliency of the buffer plate 3 carrying'the lower die 4. r j is preserved throughout the draw. '95 40 5 indicates a pressure or draw ring dis- Alternatively the desired motion may be posed within the die 4 and supported by pins transmitted to the r-0d 13' by means of rack 6 passing through thetable and resting upon and pinion gear. For example a pinion a second table 7 disposed beneath the table 2. mounted uponthe lower end of the rod ac- The table 7 is perforated for the free passage tuating' the plug may engage other pinions 1 of a tubular rod 8, which rod at its lower end on the U-shaped bracket -9 which in turn enpasses through a bracket 9 comprising an upgage racks carried by the second table 7.

per member having upon its under surface Claims: 1

and at each end a downwardly projecting lug 1. In a press for drawing sheet metal, a

10. llindicates a nut whereby the bracket 9 movable die, a fixed di s forming block in 105 is held against downward movement upon said fixed die, and means for moving said the tubular rod 8. I block toward said movable die during the 12 indicates a rubber buffer through which drawing operation. the tubular rod 8 passes, said buffer being in- 2. In a press for drawing sheet metal, a

terposed between the under surface of table movable die, a fixed die, a forming block in 110 7 and the upper surface of bracket 9. The said fixed die, a pressure ring surrounding nut 11 also permits the initial ad ustment oi said block, means resiliently supporting said i. In a press for drawing sheet metal, a

movable die, aiixed die, atorming block in said fixed die, a pressure ring surrounding said block, pins supporting said pressure ring, a table supporting said pins, a resilient support for said table, a rod connected to the forming block and passing ti and means operable by the said table to move said forming b10011 towards the movable die during the drawing operation.

, 5. In a press for, drawing sheet metal, a movable-die, a fixed die, a forming block in said fixed die, a pressure ring surrounding said block, pins supporting said pressurering, a table supporting said pins, a resilient support i'or said table, a. rod connected to. the :l'orming block and passing through said'table, levers connected to said rod,supports for; said levers,-and means connected to said table and to said links whereby said levers are operated to move the forming block towards the movable die during the drawing operation. I

6. In a press for drawing sheet metal, a movable die, alixed die, a forming block in saidiixed die, a pressure ring surrounding said block, pins supporting said pressure ring, table supporting said pins, aresilientsupport for said table, a' rod connected to the forming block and passing through said table, a sleeve attached at one end to the table supporting the fixed die and passing thro'ugl'i the pressure-ring supporting table, a bracket secured to the other end of said sleeve, said rod passingthrough said sleeve, levers mounted upon said bracketand connected at one end to tlie rod, and means upon the table supporting the pressure ring connecting said table with the opposite end of said levers whereby the block is moved towards the movable die during the drawing operation. V

7. In a press for drawing sheet metal, a movable die, a fixed die, a; forming block in said fixed die, a pressure ring surrounding said forming block, pins supporting said pressure ring, a table supporting said pins, a

irough said table,

buffer supporting said table, a rod connected at one end to the forming block and passing through said table, a sleeve surrounding said rod and connected to the table for thefixed die and passing through said buffer, a bracket connected to said sleeve and supporting said butter, levers mounted upon said hracket'and connected at one end to the rod, rods pivotally connected tothe pressure-ring support ing table, collars upon said rods, and pivotal connections between said rods and said levers;

8, In apress tordrawing sheet metal, a movable die, alixed die, a forming block in said fixed die, a pressurejring surrounding said forming bloclg'. pins supporting said pressure ring, aftable SUPFQOYtlDg s id pins. a buffer supporting said table, a rod conne" at one end to the forming hlockand passing through said table, asleeve surrotmding said rod and connected to the table-for the lived die and passing throughsaidbu'lier, a brat et connected tosaid sleeve supporting said buffer, levers mounted upon said'bracket and connected at one end to therod,rodspivotally connected to the pressure-ring supporting table, collars. adjustably mounted upon said rods, and pivotal connect ons between said rods and'sa d levers.

. 9. In a press, a movable die, va fixed die, a

forming plug associated with said fixed die, and means operat vely associ'atedwith sa d fixed dieand plugandcooperating with said movable die to move said plug.

10. 111 a press, a ram-actuated die,-a fixed die, and an element associated with said red.

die'for movement towardssaid ram die.

11. In a press, a movable die, a fixed dieemoodyingapluralityofmovable elements, one of said elements being movable towards sa d movable die simultaneously with movement ofthe other element in the opposite direction.

12. Infa press in combination, .a movable die and a ill-(Gd dieembodying a movable loo forming plug and means to move theplug in a direction opposite the movement of the movable die upon actuation of the latter.

13. In a press, a rani, a die associated there- 1 with, a fixed die, a pressure ring associated therewith, i a torn'ii n gplug, operatively 1 asso' ciated withsaid pressure ring, and means ins wnereby contact of said'ram die with said* pressurering moves said plug towards said ramdie.

In testimony whereof. Ihave hereunto set my hand.

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