US543971A - Sheet metal pipe blanks - Google Patents

Description

4 sheets-sheet 1.

(No Model.)

l D.H.IST0LL. MACHINE PORTORMING SHEET METAL lPIPE BLANKS.

No.- 543,971.l Patnted Aug. 6, 1895.

www; m J. m m v TM f/W n, |II. Q S Il .b [wia & MJE .w I .l M Il =.h..n= Il qw @w .M M H -Pn Y 4 Sheets-Sheet 2.

(No Model.)

D.v H. STOLL. MACHINE EOE EGEMING SHEET METAL PIPE BLANES.

Patented Aug. 6., 1895.

(No Model.) 4 Sheets-Sheet 3.

D. H. STOLL. FORMING SHEET METAL PIPE BLANKS.

MACHINE FOR (No Model.) 4 Sheets-Sheet 4. 4D.H.ST0LL.

MACHINE FOB. PORMING SHEET METAL PIPE BLANKS.

No. 543,971. Patented Aug. 6, 1895.

Il 1 l il I ,I im f I nventor.

ALL-orney.

W itnesses:

STATES PATErVr OFFICE.

DANIEL H. STOLL, BUFFALO, NEW YORK, ASSIGNOR OF ONE-HALF TO MICHAEL NEWELL, OF SAME PLACE.

MACHINE FOR `I-'OJRlVIINCi SHEET-METAL PIPE-BLANKS.

SPECIFICATION forming part of Letters Patent NO. 543,971, dated August 6, 1895. Application'filed September 5, 1894. Serial No. 522,205. (No model.)

Y ures of reference marked thereon, which form a part of this specification.

My invention relates particularly to improved machinery for forming sheet-metal conductor pipe-blanks.

The object of my invention is to provide special mechanism for bendinga strip of sheet metal into cylindrical form, both of its longitudinal edges having been previously turned over.

To that end my invention consists, essentially, of a revoluble notched mandrel, around which the sheet-metal strip is shaped,spring guides for directing the turned-over edge of the sheet-metal strip into engagement with the notched mandrel, a reciprocating former for holding the sheet metal against the mandrel during its revolution and for releasing the same for removal, and means for revolving the mandrel and reciprocating the former to shape the sheet-metal strip in forming the pipe.

Myinvention further consists in certain details of construction, all of which will be more particularly hereinafter described,and pointed out in the claims.

In the drawings, Figure l is a front elevation. Fig. 2 isarear elevation. Fig. 3isatop planview. Fig.4isaright-handendelevation, and Fig. 5 is a left-hand end elevation, of my improved machine. Fig. 6 is a transverse vertical sect-i011 of Fig. l, taken in the line x Fig. 7 is a detached top plan view of the clutch, cam, and connected operative mechanism. Fig. 8 is an enlarged vertical section of the notched mandrel and former with the sheet-metal strip in position to be shaped, and'Fig. 9 is a similar section after the shaping operation is completed. Fig. 10 is a central vertical section through the right-hand end of Fig. 3 in the line y y, and Fig. 11 is a detached side elevation of the cam.

Referring to the drawings, 1 1 are the standards, and 2 the body, of the frame upon which the operative parts are mounted.

3 is an oblong open bracket extending out from the standard 1 on the right-hand end of the frame. In the outer end of this bracket is journaled the short shaft 4. Upon the outer end of this shaft 4 is rigidly mounted the power-pulley 5 and upon the inner end is loosely mounted the bevel-gear 6. 7 is feathered upon the shaft 4 and adapted, when engaged with the bevel-gear 6, to impart rotary motion to the same. This clutch is thrown into engagement by the hand-lever 8, its lower endh'aving pivoted to it one end of the connecting-rod 9, the other end of which being pivoted to the short lever 10, which forces the clutch 7 toward the bevel-gear 6. A vertical frame 11 is dovetailedinto the standard 1 and is adjusted therein vertically by the screw 12 and attached hand-Wheel 13. This frame 1l carries the upper and lower bearings 14 and 15, in which is journaled the vertical shaft 16. A bevel-gear 17 is feathered upon this shaft 16 and intermeshes with the small bevel-gear 6 upon the shaft 4. The shaft 16 passes up through the bearing 18, which is adapted to swing upon this shaft as a pivot, its inner end 19 resting upon the frame 11. A bolt 20, (see Fig. 10,) in engagement with the inner end 19,holds it down upon its seat and at the same time permits it to swing upon its pivot, the head of the bolt riding within a recess 2l in the bearing 14. Upon the upper end of shaft 16 is'rigidly mounted the bevelgear 22. In a vertical extension 23 of the bearing 18 is journaled the shaft 24, and upon this shaft outside of the extension 23 is rigidly mounted the small bevel-gear 25, which intermeshes with the bevel-gear 22 upon shaft 16. On the inner side of the extension 23 and integral with the shaft 24 is the open cylindrical socket 26, in which the mandrel 27 is removablysecured by the bolt.28. The outer end ofthe shaft 24 is extended beyond the bevelgear 22, in order that the mechanism may be set in motion by hand, if necessary. Upon the left-hand end of the frame is dovetailed A clutch IOO the vertical frame 29, which is adjusted up and down, as desired, by the screw and attached hand-wheel 31. At the upper end of the frame 29 is the bifurcated socket 32, adapted for the removable reception of the outer end of the mandrel 27, carrying the handle 33. The mandrel 27 is retained in this socket while being revolved by the holder 34, carrying the handle 35. l This holder 34 is pivoted so as to swing in the upper portion of the bifurcated socket 32 and extends down across the front of the socket when in its lowest position to hold the mandrel. The mandrel 27 is provided with a longitudinal concentric notch 36, (see Figs. 8 and 9,) the end wall of the notch being formed into a radial shoulder 37. Upon ashelf 3S in frontof and below the mandrel are secured a series of leaf-springs 39, which extend partially under the mandrel. The function of these springs 39 is to guide and force the turned-over edge 40 of the sheetmetal strip 41 into engagementl with the notch i 36 in the mandrel, as clearly shown in Fig. S,

prior to the revolution of the mandrel.

The former against which the sheet-metal strip strikes and whichis held against the mandrel during its revolution to give ita cylindrical shape is shown at 42, and is provided with dovetailed projections 43, which slide back and forth in sockets 44 in the frame as the former is reciprocated to "its two extreme positions, as shown in Figs. Sand 9. The means for reciprocating the former are arranged as follows:

45 is a rock-shaft (see Fig. 6) journaled across the frame below the former 42. Upon this shaft is rigidly mounted a series of rocker arms 46, extending upwardly and loosely engaging with the sockets 47 upon the under side of the former. Underneath these rocker-arms and upon the rock-shaft 45 are the segmental gears 4S, which intermesh with similar segmental gears 49 upon a second rock-shaft 50, journaled across the frame be low the irst rock-shaft 45. An arm 51, rigid upon the rock-shaft 50, has attached to it one end of a stiff coiled spring 52, the other end of which is secured to one of the standards of the frame.

53 is an arm rigidly secured to one end of the rock-shaft 50 and carries at its outer end the friction-roller 54. A cam 55, surrrounding the vertical shaft 16, is adjustably secured to the bevel-gear 17 by the bolts 56, which pass through the curved slots 57 in the cam 55. rlhe friction-roller 54 is held by the force of the coiled spring 52 against the upper edge of the cam 55, which is provided on one side with the depression 58. (Sec Fig. 11)

59 is an adjustable projection secured to the upper face of the bevel-gear 17 by the bolt 60 passing through the curved slot 61 of the projection, and 62 is a rigid projection also se cured to bevel-gear 17. These .projections are adapted for engagement with theprojcction 63 upon the clutch for releasing its engagement with the bevel-gear 6, as will be more fully hereinafter explained.

The operation of my improved mechanism is as follows: The sheet-metal strip 41, with its edges 40 and 64 turned in opposite directions, is laid upon the table 65, and the turnedover edge 40 forced between the springs 39 and the mandrel 27 in the position shown in Fig. S, the shoulder 37 serving as a stop for the inserted edge of the sheet-metal strip, which is, with the help of the springs 39, forced into engagement with the concentric notch 36. the former 42 being in the position shown in Fig. 8. Power being applied by a belt to the pulley 5, the lever 8 is pulled over to the left, which effects an engagement of the clutch 7 with the bevel-gear 6. This results, through intervening mechanism already described, in causing the mandrel 27 to revolve, carrying the attached sheet-metal strip against the former 42, and as the mandrel continues to revolve the strip is thus forced against the same and caused to assume a cylindrical form around the same, as clearly shown in Fig. 9, the free edge of the strip overlapping theattached edge for about a third of the circumference of the mandrel. As the cam 55 revolves with the bevel-gear 17, the frictionroller 53 drops down the abrupt side G6 of the depression 58 of the cam, which has the effect of turning the rock-shaft 50. The intermeshing- gears 43 and 49 cause the levers 46 to be thrown over, carrying with them the former42 until it assumes the position shown in Fig. 9. The projection 59 then strikes the projection 63 upon the clutch, releasing it and automatically stopping the operation of the mechanism. The pivotcd holder 34 is then thrown up, thus releasing the outer end of the mandrel, which can be swung out to remove there from the shaped sheet-metal strip. The mandril is then replaced and secured in its holder and the lever 8 is again pulled to the left to throw the clutch 7 once more in engagement with the bevel-gear 6. As the bevel-gear 17 with its attached cam again revolves it returns the mandrel to its former position ready for the next sheet-metal strip. and as the frictionroller rides up theinclined side 67 outof the depression 58 the former 42 is also thrown back to its former position adjacent to the mandrel. The rigid projection 62 next strikes the projection 63 upon the clutch, releasing it and again automatically stopping the machine, which is now readyin all its parts to form the next sheet-metal strip. Different sizes of mandrels can be interchangeably employed with my improved mechanism, the verticallyadjustable frames 11 and 29 being moved up or down correspondingly to the change in the di ameter of the mandrel employed, the adjustable projection 59 being also changed in position to properly regulate the releasing of the clutch. Other forms of springs than those herein shown to guide the sheet-metal strip The machine is now ready for operation,

l ting former for holding the sheet-.metal strip shaped, a formermovable to and from the mandrel for holding the sheet-metal strip against the mandrel during its revolution and for releasing the same for removal and automatic means for revolving the mandrel and reciprocating the former.

2. A machine for forming sheet-metal pipeblanks consisting ot' a revoluble notched mandrel around Which the sheet-metal strip is shaped, spring guides for directing the turned over edge of the sheet-metal strip into engagement with the notched mandrel, a reciprocating former for holding the sheet-metal strip against the mandrel during its revolution and means for revolving the mandrel and reciprocating the former.

3. A machine for forming sheet-metal pipeblanks consisting of a pivoted revoluble notched mandrel around Which the sheet metal strip is shaped, a former movable to and from the mandrel for holding the sheetmetal strip against the mandrel during its revolution and for releasing the same for removal and automatic means for revolving the mandrel and reciprocating the former.

4. A machine for forming sheet-metal pipeblanks consisting of a pivoted revoluble notched mandrel around which the sheetmetal strip is shaped, spring guides for directing the turned over edge of the sheet metal strip into engagement with the notched mandrel, a reciprocating former for holding the sheet-metal strip against the mandrel during its revolution and means for revolving the mandrel and reciprocating the former.

5. A machine for forming sheet-metal pipeblanks consisting of a revoluble notched mandrel around which the sheet metal strip is shaped a reciprocating former for holding the sheet-metal strip against the mandrel during its revolution and means for revolving the mandrel and reciprocating the former and automatically stopping the mechanism after the sheet metal strip has been shaped.

6. A machine for forming sheet-metal pipeblanks consisting of a revoluble notched mandrel around which the sheet-metal strip is shaped, spring guides for directing the turned over edge of the sheet-metal strip into engage- Y ment With the'notched mandrel, a reciprocaagainst the mandrel duringits revolution and meansfor revolving the mandrel and reciprocating the former and automatically stopping the mechanism after the sheet metal strip has been shaped.

7. A machine for forming sheet-metal pipeblanks consisting of a pivoted revoluble notched mandrel around which the sheet metal strip is shaped, a reciprocating former for holding the sheet-metal strip against the mandrel during its revolution and means for revolving the mandrel and reciprocating the former and automatically stopping the mechanism after the sheet metal strip has been shaped.

8. A machine for forming sheet-metal pipeblanks consisting of a pivoted revoluble notched mandrel around which the sheetmetal strip is shaped,-spring guides for directing the turned over edge of the sheet metal l strip into engagement With the notched mandrel, a reciprocating former for holding the sheet-metal strip against the mandrel and reciprocating the former, andv automatically stopping the mechanism after the sheet-metal strip has been shaped.

9. A machine for forming sheet-metal pipeblanks consisting of a revoluble notched mandrel around which the sheet metal strip is shaped, a reciprocating former for holding the sheet-metal strip against the mandrel during its revolution and means for revolving the mandrel and reciprocating the former and automatically stopping the mechanism after the sheet metal strip has been shaped and after the operative parts have been restored by power to their normal positions.

10. A machine for forming sheet-metal pipeblanks consisting of a revoluble notched mandrel around which the sheet-metal strip is shaped, spring guides for directing the turned over edge of the sheet-metal strip into engagement with the notched mandrel, a reciprocating former for holding the sheet-metal strip against the mandrelduring its revolution and means for revolving the mandrel and reciprocating the former and automatically stopping the mechanism after the sheet metal strip has been shaped and after the operative part-s have been restored by power to their normal positions.

1l. A machine for forming sheet-metal pipeblanks consisting of a pivoted revoluble notched mandrel around which the sheet 'metal strip is shaped, a reciprocating former for holding the sheet-metal strip against the mandrel during its revolution and means for revolving the mandrel and reciprocating the former and automatically stopping the mechanism after the sheet metal strip has been shaped, and after the operative parts have been restored by power to their normal positions.

l2 A machine for forming sheet-metal pipeblanks consisting of a pivoted revoluble notched mandrel around Which the sheetmetal strip is shaped, spring guides for directing the turned over edge of the sheet metal strip into engagement with the notched man-v drel, a reciprocating former for holding the ICO IIC

sheet-metal strip against the mandrel during In testimony whereof I have signed my its revolution and means for revolving the name to this specication in the presence of mandrel and reciprocating the former and two subscribing Witnesses.

automatically stopping the mechanism after DANIEL H. STOLL. 5 the sheet-metal strip has been shaped and lVitnesses:

after the operative parts have been restored W. T. MILLER,

by power to their normalpositions. F. P. KERSTEN.

Images