Syphon Top Flanging.pdf

Dec. 16, 1924. 1,519,778.

C. G. HAWLEY

METHOD AND MACHINE FOR FLANGING THERMIC sIPHONS AND THE LIKE

2. Sheets-Sheet 1 Filed May 13, 1922

Dec. 6, 1924. 1,519,778.

C. G, HAWLEY

METHOD AND MACHINE FOR FLANGING THERMIC SIPHONS AND THE LIKE

Filed May 13, 1922 2 Sheets-Sheet 2 as a 2-st 2 t25 Aft

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Patented Dec. 16, 1924. 1,519,778

CHARLES GILBERT HAWLEY, OF CHICAGO, ILLINOIS, ASSIGNOR TO LOCOMOTIVE

FIREBOX COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

IEEOD AND MACHINE FOR ANGING TEES...I.C. Sipi CNS AND HE KE.

Application filed May 13, 1922, Serial No. 560,672.

To all whom it may concern:

Be it known that . CHARLEs GILBERT

HAWLEY, a citizen of the United States, and a resident of Chicago, Cook County, Illinois, have invented a certain new, useful, and in proved Method and Machine for Flanging Thermic Siphons and the like, of which the following is a specification.

My invention relates to improved methods and means for flanging heavy metal sheets such as boiler plates. The object of the in vention is to enable the flanging of Such plates with little expenditure of man and machine power, at low cost and speedily. A further object of the invention is to provide for the fianging of boiler plates and the like in a cold state as contrasted with the usual methods of hot flanging such plates and parts.

I shall not herein attempt to recite the methods nor describe the means hitherto used for the purpose, as they have been in use for many years and are very well known. In a sense, depart from usual methods to the extent of reversing the operations in relation to the body of the part or sheet to be acted upon. Hitherto it has been the practice to block or fasten the sheet to be flanged in a clamp or press and then to move upon the projecting edge with hammers, press parts or dies so persistently applied or forcibly driven against the edges as to bend them over to the desired angle with respect to the body of the plate or sheet. in contrast, with any invention, the edge of the sheet is the part which is blocked or fastened in a fixed member and it is the main body of the sheet which I move to an angular position. With respect to the clamped edge. Incidentally by the application of what I term radius bars or clamps to the body of the sheet I am.

able to determine or cause the flange to con form to any desired radius. Other novel features of my invention will appear herein after as related especially to the flanging of triangular thermic siphons, in which opera tion, in order to expedite the flanging proc ess, I prefer to resort to the use of heat and sledge blows in order to turn a difficult flange at the top back end of the siphon.

My invention will be readily understood on reference to the accompanying drawings, in which Figure 1 is a side elevation of a flanging block or machine enabodying my in vention, showing a thermic siphon blank in position therein: Fig. 2 is a vertical section substantially on the line 2-2 of Fig. 1:

Fig. 3 is a plain view taken from Figs. 1 and 2: Fig. 4 is a perspective view of the flang ing block embodying my invention; Fig. 5 is an enlarged cross section of the flanging block with the siphon blank in position therein, better showing the nature and rela tion of the before-mentioned radius bal's; Fig. 6 is a diagi'annatic end view showing how the first haif of the back end is turned or fianged in this fianging block or clamp;

Fig. 7 is a like view showing how the other half of the fiange is turned, and Fig. S is a side view taken from Fig. 7.

The Nicholson therlaic siphon above re ferred to is a substantially triangular water Wall for use in locomotive fireboxes. It need not be here described in detail beyond say ing that at the top the siphon is flanged out Ward in Order that it may conveniently be attached to the ci'own sheet of the firebox.

The flanging of the siphon top has proven to be difficult and laborious when done by any of the older methods familiar to metal work ers and boiler nakers. By this invention I have greatly sinpified the manufacture of siphons. in the drawings hereof the sub stantially triangular siphon blank 2 pre Senting the parallel sides 2', 2', is shown in inverted position, it being in that position that it is operated upon in the flanging block about to be described. It will be noted that the closed bottom 3 of the siphon blank merges with the edges 2 at the lower back end 4 Tile edges 2 are to be flanged out Wardly with respect to the sides 2 and the portion 4 is to be flanged outward to con form to the general piane of the edges 2'.

The completed flange is well shown in Figs.

and 8. It is not always at right angies to the body of the siphon, but more frequently at diverse angles thereto, as indicated in Figs. 6 and 7. Hither to this diverse angu larity of the flanges has occasioned much difficulty in manufacturing.

The fianging block referred to comprises the base 5 with the upstanding rail 6.

Alongside the rail is a parallel movable rail 7, having a base 7 which rests upon the top of the base 5 and is movable thereon. As well shown in the drawings, one edge 2 of the plate to be flanged is positioned and fas

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tened between the rails 6 and 7. Usually I provide the edges 2' with perforated ears 8 for the reception of gauge pins 9, by which the position of the edge 2'' is fixed between the rails. After positioning the edge, which is done with the body of the siphon in up right position as shown by full lines, the rail T is driven forcibly into place and there se cured by means such as the wedges 10, of which there may be several. The lap-bolts 11 are then made fast and these, with the under-grip 12 of the rail 7 in the groove of the part 5, prevent movement of the Irail 7 during the operation of bending over the plate. Before placing the body of the siphon in the described flanging block, I provide the siphon with a row of holes for the recep tion of the cross-bolts 13. By these bolts I Secure in position 3 parts, to-wit, the spac ing block 14 (between the sides 2, 2’) and the two radius bars 15 and 16. These bars best appear in Fig. 5. As there shown, they are proportioned and adjusted for the mak ing of an angular flange of the sort shown in Fig. 7. Obviously, being secured by the cross-bolts 13, the radius bars are clamped firmly against the sheet, thus the edge 2' which is held in the flanging block, is like wise rigidly clamped between the spacing block 14 and the radius bar 16. It follows that the only place or region in which the plate can be bent is that much of the plate which is exposed between the top of the rail 6, and the lower edge of the radius bar 16.

By fixing this distance I determine the radius which will be formed when the sheet is bent over to some such position as shown by dotted lines in Fig. 5. It is by reason ot this that I have given the name radius bars to the parts 15 and 16. Obviously, the gaug ing or positioning of the edge of the plate between the rails 6 and 7, as by means of gauge pins 9, performs the remainder of the function of fixing the dimension of the flanged radius or bend. .

Having equipped the siphon body and placed it in the flanging block as above de scribed, I next apply thereto a bar or lever 17 to the upper end of which attach a ca ble 18 leading from a winding drum or winch (not shown), by which the whole body of the siphon may be pulled over, fol lowing the arc 20 of Fig. 2, until drawn down to the right angular position with respect to the edge or portion held between the rails 6 and 7.

As thus far described, the flanging of the plate applies equally well to the flanging of any boiler part or plate requiring a straight flange of uniform radius. Before passing to a description of the method used in flang ing the back end of a siphon, call atten tion to the fact that a radius of non-uniform dimensions may be drawn into the flange of the plate by varying the position of the lever

1,519,778

17. Normally it occupies the mean strain position upon the plate. That is, it is placed upon the line which, due to the shape of the article being flanged or other cause, marks the division or middle point of the bending strains. In the case of a folded siphon blank this line is well toward the front end of the body of the siphon, as here shown.

The operation above described is conduct ed with the sheet or siphon body in a cold state. Due to the great leverage upon which the force is applied, very little power is ap plied to pull the plate over as depicted in Fig. 2. This last operation is conducted slowly and while it is going on I apply heat ing torches to the end portion 4 and while the motion is taking place the hot end 4 is flanged over by hand. That is, by sledges in the hands of strikers. The blacksmith meantime uses such fulle's and flatter's as may be required to naturally maintain the internal shape of the siphon at the end of the space 2 therein (see Fig. 8). It should be understood that while this is going on the plate is very rigidly held in the flanging block and that at no time is the metal flange struck againstally underlying metal part.

in other words, during the few minutes con sumed in moving the lever 17 from upright to lowered position the blacksmiths, so to speak, heat and flange the projecting end of the siphon without resort to any die or back ing plate whatever. In other words, the whole flanging operation may be said to be conducted in the air. At no time is a ham mer blow struck on any part which actually rests against a backing plate or die. In con sequence, the cracking or warping of a flange is unknown where this invention is in use.

Having thus finished the flanging of one half or one side of a siphon as depicted in Fig. 6, the siphon is removed from between the rails 6 and 7, and is reversed in position with its end 4 at the opposite end of the flanging block. The straight edge 2' of the siphon is then clamped between the rails 6 and 7 and the above operations are repeated as to that side of the siphon. The arrows of Figs. 6 and 7 generally depict the direc tion of the sledge blows which are struck upon the end flange 4 during the bending operation. Upon the completion of the flanging operation as depicted in Fig. 7 the job is removed from the flanging block, in a completed state, and it only remains to re move the parts 14, 15 and 16 therefrom. It will be obvious that flanges of any desired angles may be formed according to the num ber of degrees through which the body of the sheet or siphon is moved in Swinging or rotating it about the upper edge of the rail 6.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

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1,519,778

1. A machine for flanging boiler plates and the like, comprising a fixed rail and a movable rail and means for clamping the same upon the edge of the plate to be flanged, a spacing bar and a radius bar to be clamped to said plate above said rails and means for attachment to said plate for pulling the same over to the desired angle with respect to said rails.

2. The herein described method of flang ing thermic siphons, which consists in clamping a spacing bar block between the sides of the siphon adjacent the edges to be flanged and in clamping ladius bars against the outer surfaces of said sides, then placing the edge to be flanged in proper position be tween clamping rails and pulling the body of the siphon over to the desired angle with respect to the edge clamped between said rails.

3. The herein described flanging block composed of an elongated T-shaped member comprising a base and an upright flanging rail, the latter having a narrow top to avoid the bend of the plate acted upon, in combi nation with a similarly elongated clamping rail movably seated on said base, and, means for driving and holding said clamping rail against the flanging rail to clamp the plate between the two.

4. The herein described flanging block composed of an elongated T-shaped member comprising a base and an upright flanging rail, the latter having a narrow top to avoid the bend of the plate acted upon, in combi nation with a similarly elongated clamping rail movably seated on said base, means nor mally interlocking the parts to prevent the tilting of the clamping rail, and means for driving and holding said clamping rail against the flanging rail to clamp the plate between the two.

5. The herein described flanging block composed of an elongated T-shaped member comprising a base and an upright flanging rail, the latter having a narrow top to avoid the bend of the plate acted upon, in combina tion with a similarly elongated clamping rail movably seated on said base, means for driving and holding said clamping rail against the flanging rail to clamp the plate between the two, and means adjacent the block for pulling over a plate held therein.

In testimony whereof, I have hereunto set my hand this 6th day of May, 1922.

CHARLES GILBERT HAWEY.

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