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Aug. 6, 1946. 1_, G. BERQUlsT v 2,405,128 FORMING MACHINE Filed April 8, 1944 5 Shee’cs--Shfmïl l Aug- 6, 1946. L. G. BERQUlsT 2,405,128 FORMING MACHINE Filed April 8, 1944 5 Sheets-Sheet 2 ' Aug. 6, 1946. L. G. BERQUls-r 2,405,128 FORMING MACHINE Filed April 8, 1944 5 Sheets-Sheet 3 Aug- 6, 1945- L. G. BERQUIST 2,405,128 FORMING MACHINE Filed April 8, 1944 I ZZ 5 Sheets-Sheet 4 Àug. 6, 1946. - L, G. BERQUgST ’ .2,405,128 FORMING MACEENE Filed April 8, 1944 5 Sheets-Sheet 5 Patented Aug. 6, 1946 2,405,128 UNITED STATES PATENT OFFICE 2,405,128 FORMING MACHINE Leonard G. Berqulst, Niles, Mich., assigner to Na tional-Standard Company, a corporation of Michigan Application April 8, 1944, Serial‘No. 530,204 9 Claims. (Cl. 153-28) 1 This invention relates to forming machines for shaping a continuous strip of metal, and more particularly to a machine wherein a strip of metal is drawn between forming rolls, and may subsequently be h‘elically wound and soldered to form a flexible tube. The primary object oi’ the present invention is to provide an improved forming machine wherein the space between the coacting rolls can be regulated very accurately by individual ad 10 justing means, and the machine may be opened up to receive a new strip of metal without dis turbingthe individual adjusting means. The invention is illustrated in a preferred em bodiment in the accompanying drawings in 15 which Figure 1 is a side elevational view of a ma chine embodying the invention; Fig. 2, a tcp plan view of the same; Fig. 3, a fragmentary Z again as far as it can go, the forming rolls will be returned to operative position Without dis turbing their individual adjustment. As will be seen in Fig. 6, each of the auxiliary carriers or yokes I2 is adjustably secured to the carrier II by means of a machine screw 24, ex tending through an enlarged clearance slot 25. A threaded stud 26 is secured to the auxiliary car rier I2 by means of a pin 21. The stud extends through an arm 28 of the carrier II, and is pro vided with a pair of nuts 29 and 30, which en able the auxiliary carrier to be adjusted up and down on the carrier Il with a high degree of accuracy, when the bolt 24 is loosened. As will be understood from Figs. 3 and 5, the forming rolls are each provided with ball bear ings 3I and the upper and lower rolls are com plementary to each other, so that a metal strip advancing from right to left as viewed in Fig. 1, will gradually be shaped into the form shown in Fig. 5, as it leaves the machine. In that shape the metal strip is ready to be wound helically and soldered to itself to form a metal flexible tube. The machine is provided at its entry end with an upper flat guide roll 32, which is carried sectional view taken as indicated at line 3-3 of 20 Fig. 1; Fig. 4, an end elevational view of the entry side of the machine; Fig. 5, a fragmentary sec tional view taken as indicated at line 5-5 of Fig. l; Fig. 6, a vertical sectional view taken as indi cated at line 6--6 of Fig. l; Fig. 7, a fragmentary 25 by the main carrier I I so as to move up and down elevational View showing a modified construction; therewith. A lower guide roll 33 is journalled on and Fig. 8, a side elevational view showing an the main frame. The machine is also provided other modified constrution. with a pair of lateral guide rolls 34 and 35, which In the embodiment illustrated in Figs. 1_6, a main frame 9 is provided with an upwardly ex 30 are grooved to engage and bend one edge of the metal strip down and the other edge up before tending standard ID on which are slidably mount the strip reaches the horizontal grooved guide ed a series of main carriers I I. An auxiliary car rolls 3S. The guide roll brackets are adjustable rier I2 ls secured to each of the main carriers II, on the machine by means of nuts 3l to accommo and afford bearings for upper forming rolls I3 which are complementary to lower forming rolls 35 date different widths of strips. Whenever a length of metal strip is used up, I4 journalled in yokes I5, which are rigidly se the operator must open up the machine to admit cured to the main frame by means of bolts I5. a new strip. This is done by unscrewing each or" As will best be understood from Fig. 6, a series the clamping screws 2I and threading the strip of hollow upwardly extending tapped liner pins I1 are secured to the main frame by means of 40 through the guide rolls and between the coacting forming rolls. The forming rolls may then be set screws I8. Each of the carriers Il is bored brought back into properly adjusted relation by t0 make a, sliding connection With one of the merely turning each of the clamping screws until pins I'l. A compression spring I9 rests on the top the carrier travels down as far as it can go. of each liner pin I'l and bears against a bushing In the modiñcation shown in Fig. '7, the appa 20 which makes a, tight pressed iit with the up ratus is similar, except that the clamping screws per end of the bore in the carrier. A clamping 2I have been replaced by a toggle mechanism. screw 2I, having a handle 22 has a shouldel` 23 The main frame is provided with an upwardly to bear against the bushing, and its threaded extending arm 38, on which is pivoted at 39 a lower shank extends into the tapped opening in the liner pin I'I. Thus it will be understood that 50 lever 40. The lever is pivoted at 4I to a pitman 42, which is pivotally connected at 43 to a shaft when the clamping screw is unscrewed, the spring 44 to raise and lower the carrier II. rl‘he mech I9 will urge the carrier II upwardly and sufli anism is self locking, and to open the rolls it is cient space may be provided between the form merely necessary to move the arm 40 to the posi ing rolls I3 and I4 to permit a ilat strip of metal to be inserted. When the screw is turned down 55 tion indicated by the dotted line. 2,405,128 4 3 In Fig. 8, is shown somewhat diagrammatically, another modiñcation wherein one set of forming rolls is journalled in the bottom frame 45, and the other set is journalled in the top frame 45, which is hinged to the lower frame at 41. At the entry side of the machine is a clamping arm 48, which is provided with a link 49, pivotally secured to the top frame at 50, so that when the arm 48 is thrown downwardly about a bearing socket 5I, the rolls will be drawn into operative position. The top frame may be released by swinging the arm 48 to the position shown by dotted lines to admit a new strip of metal. The top forming rolls are individually adjustable. It will be understood that the clamping latch and hinge are positioned out of the line of travel of the strip. If preferred. the hinge and latch may be replaced by screws, urges said carrier away from ñxed position on said pin, and a manually operable clamping screw is threaded into the liner pin to draw the carrier to ñxed position. 4. A machine as speciiied in claim 1, in which the main carrier is slidably mounted on the frame and the means for moving the main carrier in cludes a manually operable toggle mechanism. 5. In a machine for forming a continuous strip of metal: a frame; a plurality of lower forming rolls journalled in said frame; a main carrier slidably mounted on the frame above each of said lower rolls; an auxiliary carrier adjustably mounted on each of said main carriers; an upper forming roll journalled in each of said auxiliary carriers, said roll being complementary to the companion lower forming roll to shape a strip of metal drawn between said rolls; and means for moving said main carriers to and from a ñxed The foregoing detailed description is given for 20 position, said means opening the space between clearness of understanding only, and no unneces the upper and lower rolls. 6. A forming machine comprising: a plurality sary limitations should be understood therefrom, of forming rolls journalled in a fixed frame; a for some modifications will be obvious to those plurality of complementary forming rolls jour skilled in the art. 25 nalled in said frame t0 coact with said first men I claim: tioned rolls and progressively shape a strip of l. In a machine for forming a continuous strip of metal: a frame; a forming roll journalled in metal drawn between said rolls, said complemen tary rolls having individual adjusting means for said frame; a main carrier mounted on said regulating the operating space between rolls; and frame; an auxiliary carrier secured to said main carrier; a second forming roll journalled in said 30 means for opening the space between the coact cams, or some other conventional clamping means. auxiliary carrier to coact with the ñrst mentioned roll in shaping a strip of metal drawn between said rolls; means for accurately adjusting the position of the auxiliary carrier on the main car rier; and means for moving the main carrier bodily to and from a ñxed position on the frame without disturbing the adjustment between car riers. ing rolls without disturbing the individual ad justing means. '7. A' machine as speciñed in claim 6, in which the means for opening the space between coact ing pairs of rolls includes manually operable clamping screws. 8. A machine as specified in claim 6, in which the means for opening the space between coact ing pairs of rolls includes a toggle lever mecha 2. A machine as specified in claim l, in which the main carrier is slidably mounted on the frame 40 nism for each complementary forming roll. and the means for moving the main carrier in 9. A machine as speciñed in claim 6, including cludes a manually operable clamping screw. two pairs of guide rolls, at one end of the frame, 3. A machine as specified in claim 1, in which to direct the metal strip into the ñrst pair of forming rolls. the main carrier is slidably mounted on a hollow tapped liner pin secured to the frame, a spring 45 LEONARD G. BERQUIST.