US1973164A - Pipe forming machine - Google Patents

Description

Sept. 1l, 1934. E J DREIS 1,973,164

PIPE FORMING MACHINE Filed June 23, 1931 4 Sheets-Sheet 1 ATTORNEYS.

Sept.' 11, 1934. E. J, DRL-:ls

PIPE FORMING MACHINE Filed June 23. 1951 4 Sheets-Sheet 2 IN VEN TOR. bw/seo d. DRE/S.

E,"BY n/ A TTORNEYS.

Sept. 1l, 1934. E. J. DREls PIPE FORMING MACHINE Filed June 23. 1951 4 Sheets-Sheet 3 INVENTOR. fp ve/AQ@ DRE/s,

Filed June 23, 1931 4 Sheets-Sheet 4 INVENTOR. [ou/ARD d. Def/s.

fmwdlid m A TTORNEYS.

Patented Sept. 1,1,

srAras Claims.

This invention relates to sheet metal working machines and particularly pertains to a machine for forming sheet metal tubing.

It is the principal object of the present inven- -I- tion to generally improve the construction and operation of pipe forming machines of the character referred to by providing a machine wherein the forming rolls-may be, through the medium of a single operation, disposed in a position enabling removal of the formed tube therefrom. This obviously increases the capacity of the machine and consequently reduces the cost of producing the tubing. v

In carrying the invention into practice the lll4v forming roll on which the tube is formed is so mounted that one end thereof may be disposed in an'unobstructed position to enable the tube to be removed therefrom. The mechanism associated with the roll mentioned is such that in a single operation the forming rolls are separated and the forming roll on which the tubing is formed is released and one end thereof disposed inra position enabling removal of the formed tube. Likewise, but one operation is required to re-position the forming rolls in operative position for subsequent operation. l

One form which the invention may assume is exemplied in the following description and illustrated by way of example in the accompanying jdrawings, in which:

Fig. 1 is a perspective View of a pipe forming machine embodying the preferred form of my in'- vention.

Fig. 2 is a transverse sectional View thereof showing the mounting of the roll bearing blocks and guides.

Fig. 3 is a view in end elevation of the machine.

Fig. 4 is a view similar to Fig. 2 with rolls in released position.

Fig. 5 is a View in end elevation of the drive end of the machine.

Fig. 6 is a side elevation of the machine with parts in section.

Referring more particularly to the accompany- -ing drawings, I have illustrated a metal working machine for forming tubing out of sheet metal.

The machine here disclosed comprises a suitable frame construction 10 including two end frames 11 suitably connected together by means of tie rods 12 or other structural elements.

Y Carried bythe end frames 11 and extending horizontally `tl'ierebetween are three forming rolls,

an upper forming roll 14, a lower forming roll V15 l roll `15 is rotatably mounted at its ends in bearingV blocks 17 which are reciprocably mounted in guideways 18 formed in the end frames for vertical reciprocable movement. The mounting of the bearing blocks 17 of the roll 15 is such that the bearing blocks may reciprocate vertically in the guides 18 when the operator so desires so as to move the roll 15 ina direction at right angles to its axis toward and yaway from the upper forming roll 14. By this means the roll 15 may be released from engagement with a tube formed on the upper roll so that the formed tube may be removed.

It will be noticedrthat the forming roll 16 is positioned to one side of the upper and lower forming rolls 14 and 15 so as to cooperate therewith in forming a pipe of a sheet of metal fed between the upper andlower rolls about the upper vroll 14. The disposition of the rolls as shownV in the drawings is such as in common practice. It will be noticed that the side forming roll 16 is mounted in adjustable bearings 19 in guideways 2O on the end frames so that the forming roll 16 may be adjusted toward and` away from the upper and lower forming rolls 14 and 15.

The upper forming roll 14 is rotatably mounted in one end in a hinged bearing block 21 which is pivotally mounted as at 22 so that the entire roll 14 may be swung about Ithe pivot 22 toward and away from the lower roll 15. 'Io permit this pivotal movement of the upper roll 14, its end oppositev the pivotal bearing 21 is journalled in a bearing 23, the lower half of which is formed in the end frame 11' and the upper half of which is formed in a clamp member 24. This clamp member is pivoted as at 25 to the end frame 11 at a point eccentric to the axis of the upper roll 14 at one side thereof.` At the opposite side of` the axis of the upper roll 14 the clamp is pivotally connected as at 26 to a pivoted nut 26a which includes a socket for the threaded reception of a latch bar 27, which latch bar is adapted to be interposed between two latching lugs 28 when the clampmember isin a position so that the bearing half formed therein cooperates with the bearing half in the end frame to rotatably support the upper roll 14. The latching bar 27 is provided with an annular shoulder 29 which cooperates with a cam face 30 on the` underside of the latching lugs 28 to secure the clamp inposition.

Connected at one end to the clamp at a poinrI 31 which is intermediate the pivotal point of the clamp and the axis of the upper roll` 14 is Va pitman 32. The other end of this pitman is pivotaliy connected as at 33 toa crank arm 34A secured on a trip shaft 35. This shaft is mounted in bearings in the end frame as indicated.

It will be noticed, particularly from Figs. 1 and 2, that the bearing blocks 17 of the lower roll are each tted with a trip member 17a which are also guided for vertical reciprocation in the guideways 18 so as to reciprocate in unison with the bearing blocks 17 of the lower forming roll 15. The trip members 17a are adjustably connected to the bearing blocks 17 of the lower forming roll 15 as illustrated. At their lower ends the trip members 17a are each formed with a projection 17h which are in engagement with the periphery of the trip shaft 35. Formed in this trip shaft in a position where they will register with the projections 1713 of the trip member 17a are recesses 17e, one recess being provided for each projection 171) and which recesses are in longitudinal alignment on the trip shaft 35. When these recesses 17o register with the projections 17D, the projections 17h descend intothese' recesses, lowering the bearing blocks 17 and consequently lowering the lower forming roll l5 with respect to the upper forming roll 14. While I have shown the structure described above for lowering both ends of 'therforming roll 15,

` site the clamp member 'and which projects beyond the pivotal bearing 21, the end of the upper forming roll 14 is connected with a downwardly 'depending connecting rod 36. The lower end of this connecting rod 36 is connected t'o a crank pin 37 xed to the trip shaft 35 at an W ward movement tothe projecting end of the eccentric point relative to the axis thereof so that when turning movement is imparted to the shaft in the proper direction the connecting rod 36 will be moved downwardly and impart downuppei` forming roll 14, causing the bearing 21 to pivot about its pivotal point 22 and upraise the opposite end of the upper forming roll 14 to per- .l mit removal.

To drive the forming rolls, I provide adrive shaft 38 mounted on which is a pulley 39 which drives a pinion 40. This pinion is in mesh with a spur gear 41 rotatably mounted on the trip shaft 35 but relatively xed to a sprocket 42. An endless chain 43 is led around this sprocket and around a large sprocket 44 secured on the projecting end of the upper forming roll 14, so vas to impart a drive thereto. A spur gear 45 is also xed on the projecting end of the upper forming roll 14 and is in mesh with a spur gear 46 x'e'd on thelower forming roll 15. Therefore, when 'a drive is transmitted to the pulley 39 such drive will be transmitted through the pinion and gear 41 to the sprocket 42 and f thence through an endless chain to the sprocket 44 and the upper roll 14. The drive of the upper roll will be' transmitted to the lower roll through the gears 'and 46, causing these rolls to revolve in opposite directions.

' members 17a and consequently the lower roll will be in an elevated position and operatively related to the upper forming roll 14. A drive is then transmitted to the two rolls as previously described and a sheetof metal is led therebetween.

As this material feeds between the rolls, the roll 16 cooperates therewith to cause the pipe to be formed about the upper forming roll 14.

As soon as the pipe or tube has been formed about the upper forming roll 14, the latch bar 27 is disengaged from the latching lugs 28 and the clamp member is swung to a position as illustrated in Fig. 1. The swinging movement of the clamp from the position shown in Fig. 3 to the position shown in Fig. 1 will impart movement to the pitman 32. The movement of this pitman will be transmitted to the trip shaft 35 causing the recesses 17o to align with the projectons 17h of the trip members 17a and as these parts register the bearing blocks 17 of the lower roll 15 will descend, causing the lower roll to separate from the upper roll 14 so as to release the pipe therefrom.

Simultaneously with this descending movementY oi" the lower roll 15, the crank pin 37 will cause lowering of the. connecting rod 38 which will be imparted to the projecting end of the upper roll 14. This lowering of the projecting end of the upper roll 14 will cause the upper roll bearing 21 to pivot about its pivotal point 22 and upraise the opposite end of the roll 14, as illustrated in Fig. 1, so that the tube or pipe formed on this upper roll may be removed therefrom. This end of the upper roll may move up- Cir wardly, of course, due to the fact that the clamp 24 has been moved to an unobstructing position as illustrated in Fig. 1.

As previously stated the principal feature of the present machine is to provide a pipe forming machine wherein the formed pipe may be expeditiously removed from the machine. In

the present instance only one operation is required to release the pipe on the forming roll 14. This operation is the swingingof the clamp 24 to the position shown in Fig. 1 through the mediumof the latch bar 27.

Fromrthe foregoing it is obvious that I have provided a comparatively simple pipe forming machine which is efficient in operation and. which may be utilized to expeditiously form pipe or other tubing from sheet metal.

While I have shown the preferred form of my invention, it is to be understood that various changes may be made in vits construction by those skilled in the art without departing from the spirit of the invention as defined in the appended claims. Y

Having thus described my invention, what I claim and desire to secure by Letters Patent is: 1. In a tube forming machine an upper and a lower forming roll, meansfor simultaneously lowering the lower roll relative to the upper roll and releasing and upraising one end of the upper roll to a position enabling a tube thereon to be removed therefrom, said means including a clamp engageable with the end of the roll to be released, said clamp being movable to a releasing position, latch means for latching the clamp in clamping position and capable `of use'in moving the same to and from releasing position, reciprocable bearings carrying the lower roll, operating means for said bearings, and an operative connection be-4 tween said operating means and said clamp.

2. In a tube forming machine an upper and a lower forming roll, means for simultaneously lowering the lower roll relative to the upper roll and releasing and upraising one end of the upper roll to a position enabling a tube thereon to be removed therefrom, said meanslincluding a clamp engageable with the vend of the roll to be released,

said clamp being movable to a releasing position, a bearing for the opposite end of said roll pivotally mounted to enable upraising of the other roll end, bearing blocks for the lower roll, guides for guiding said bearings for vertical movement toward and away from the upper roll, a trip shaft, trip means connected with the bearing blocks and associated with the trip shaft whereby operation of the trip shaft will lower or raise said bearing blocks, a connection between the trip shaft and said clamp whereby movement thereof to releasing position will operate the trip shaft to lower said bearing blocks and movement to clamping position will raise the bearing blocks, andy an operative connection between the trip shaft and said upper roll whereby operation of the clamp will be accompanied by raising or lowering of the released end of the upper roll.

3. In a tube forming machine an upper and a lower forming roll, means for simultaneously lowering the lower roll relative to the upper roll and releasing and upraising one end of the upper roll to a position enabling a tube thereon to be removed therefrom, said means including a clamp engageable with the end of the roll to be released, said clamp being movable to a releasing position., a bearing for the opposite end of said roll pivotally mounted to enable upraising of the other roll end, bearing blocks for the lower roll, guides foi guiding said bearings for vertical movement toward and away from the upper roll, a trip shaft, trip means connected with the bearing blocks and associated with the trip shaft whereby operation of the trip shaft will lower or raise said bearing blocks, a connection between the trip shaft and said clamp whereby movement thereof to releasing position will operate the trip shaft to lower said bearing blocks and movement to clamping position will raise the bearing blocks, a connecting rod connected at one end to the upper roll exteriorly of said pivoted bearing and at the other end to an eccentric point on the trip shaft whereby operation of the latter will be accompanied by raising or lowering of the released end of the upper roll.

4. In a machine of the character described having a roller journalled in a frame, a pivoted clamp member overlying one end of the roller, a pivoted nut on the free end of said clamp member, a pair of lugs on the frame, a latch bar threadedly connected to said nut and insertable between said lugs, and an annular shoulder on the latch bar engageable with said lugs to hold the clamp member against the roller.v

5. In a machine of the character described having a roller journalled in a frame, a pivoted clamp member overlying one end of the roller, a pivoted nut on the free end of said clamp member, a pair of lugs on the frame, a latch bar threadedly connected to said nut and insertable between said lugs, and an annular shoulder on the latch bar engageable with said lugs to hold the clamp member against the roller, said latch bar serving as adjusting means for said annular shoulder by means of its threaded connection with the pivoted nut and also serving as a lever engaging and disengaging the shoulder and lugs.

EDWARD J. DREIS.

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