Патент USA US2115416код для вставки
April 26, 1938. K, J'. DEAHL- 2,115,416 ANNEALI NG BOX Filed April 28, 1937 13 20 l i 2 S?eets-Sheet 2 10 I I Zh?nh "_“— “TY-WM“ | I D ) \ f“ 1 _ l _ > (#148 i/ZO 1 L‘ z T E "/y m‘ E— 21 1716 21 ' 1 L____.._ . i 12111 1 ‘ |; 1 1718 / I / I | I I I I I i \ ___________________.__ ______ __\_____ \ _____________ k13\14 . 1‘ K27 K13 \z1&20' 13 14 ‘ ---/>------v 13/ / 11. £30 (31. ----- — INVENTOR mmwiy MM, % , . , 7mm Patented Apr. 26, 1938 2,115,416 UNITED STATES PATENT OFFICE * 2,115,416 ANNEALING BOX Kenneth J. Deahl, Pittsburgh, Pa., assignor, by mesne assignments, to Pittsburgh Annealing Box Company, Pittsburgh, Pa., a’ corporation of Pennsylvania Application April 28, 1937, Serial No. 139,577 7 Claims. _ (Cl. 263-49) My invention relates to annealingboxes and more particularly to those formedof sheet metal. ‘One object of my invention is to provide an annealing box of such form which for a given 5 weight or gauge of metal will have greater strength and resistance to deformation and, therefore, will be serviceable for a greater num ber of “heats” than will boxes of other forms. Another object of my invention is to provide 10 an annealing box of corrugated metal sheets wherein there is an improved arrangement of bracing and stiffening members so arranged as to reinforce and prevent deformation of the cor rugations, with consequent greater resistance to 15 any tendency of the corrugations to- spread and 25 30 40 45 50 55 The vertical channels in the side walls extend to the bottom edge of the box and serve to give greater area of support to the box. The temperature changes to which the box is subjected are, of course, very great, and the tendency toward distortion or deformation is very great, owing to the fact that parts of the box become heated or cooled much more quickly than other parts thereof. For example, the portion of the box disposed in the sand seal does not fol 10 low changes in temperature as rapidly as other parts of the box, consequently the box near ‘its bottom edge is subject to extreme diiferences in temperatures. ' ' The corrugations I3, near the bottom edge of 15 the box, are deformed or ?attened somewhat, ?atten under temperature changes and other stresses, particularly in the zones where the ap ’ as shown more clearly at 15 in Figs. 1 and 4, to plication of furnace heat is most intense. produce flutes or partial folds in the walls of the Still another object of my invention is to pro corrugations, in order to provide for greater vide a box wherein the zone adjacent to the bot yieldability or ?exibility at that portion of the . tom edge that is subjected to the greatest in box, under temperature changes, since in many tensity of furnace heat, is so formed as to have types of annealing furnaces, the heat of the greater ?exibility under temperature changes burners is applied to the exterior wall of the box than is required or desired for other portions of near its loweriedge, with consequent greater ex the box. pansion and contraction of the metal. It Will be Some of the forms which my invention may understood that the extreme lower edge of the take are shown in the accompanying drawings box which rests in the sand will become heated wherein Figure 1 is a fragmentary side view of much more ‘slowly than that portion of the box the box, partly in section; Fig. 2 is an end view immediately above the sand seal. On the other thereof; Fig. 3 is an enlarged view taken on the hand, if the box is permitted to cool while still EU line III—III of Fig. 1; Fig. 4 is a view taken on in the sand seal, the portion above the sand will the line IV-IV of Fig. 3; Fig. 5 is a view taken cool much more rapidly than the lower edge of on the line V—V of Fig. 3; Fig. 6 is an elevation the box. The greater ?exibility provided in the al view of the structure of Fig. 5, partly in sec lower portions of the corrugations consequently tion; Fig. '7 is a sectional plan view of the box, permits of greater relative expansion and con taken on line VII-VII of Fig. I; Fig. 8 is an traction of the box walls at such points without enlarged view taken on the line VIII—VIII of cracking or deforming the metal, such as so fre Fig. '7; Fig. 9 is a view taken on the line IX—IX quently happens in the case of either ordinary of Fig. 8; Fig_ 10 shows a modi?cation of the corrugated wall or ?at wall boxes. The sand structure of Fig. 9, and Fig. 11 shows still an trough l6 and the sand seal formed therein may other modi?cation thereof. be of any well-known arrangement; but in this Referring first to Figs. 1 to 9, the box is con case can be made narrower, owing to the com structed of metal sheets or plates which are pressed or ?attened corrugations, thus reducing welded together at their abutting edges to pro duce a unitary box structure having side walls the amount of sand required to effect proper seal and thereby effecting a more rapid response to l0, end Walls H, and a top wall £2. The Walls of the box are so shaped as to have temperature changes between the portion of oppositely-projecting corrugations or channels 13 the box in the sand and‘ that portion just above the sand. In addition, by the use of the nar and I4 formed therein that are substantially oo extensive with the walls of the box, the channels rowed sand trough and the ?attened wall cor in the side Walls matching the channels in the rugations, a furnace of a given size will accom-e top wall and being in eifect continuous therewith. modate a box of a somewhat larger “charge” These channels, of course, serve to stiffen the capacity. structure and enable it to .be made of lighter The side and end walls of the box have their gauge material than would otherwise be possible. corrugations strengthened and sti?ened by box 55 2 . 2,115,416 like arrangements of reinforcing and stiffening members, as hereinafter described. In the case of the outwardly-projecting chan nel-like corrugations I3, I vstiffen the same by to stiffen and hold the spaced portions of the channels 20 from excessive distortion under tem perature changes. In practical use of these boxes, ' it has been shown that instead of the whole side ’ of a box bulging out in the form of a curve, the the use of elements comprising a stem portion. bulging‘ isvcon?ned to small amounts inwardly II and aVchannel-like portion l8, which are suit ably welded together. The stiffening members v and outwardly at the various corrugations. i'|—|8 are of a length substantially equal to the ’ width of such corrugation or channel |3, and the 10' outer edge of the element I1 is welded to the web of such channel. ' V The ends of the elements I‘! Referring now to Fig. 10, I show a structure wherein the stiffening members for the out-' wardly-projecting corrugations l3 may be the 10 same as above described, but in this instance I and I8 are welded to what are'in effect the side ' provide an outer strengthening channel 'M'whose walls of the corrugations I3, as indicated at l9. ?anges are of sufficient depth or width to engage the exposed surfaces of the corrugations M, the The element II is welded to the channel-like ele 15 ment |8 along a line preferably mid-way between the ?anges of the channel, before the members i? and I8 are welded to the corrugations. The intermediate portions of the ?anges being cut 15 away opposite the corrugations 83. The flanges of the channels 2d are welded to the adjacent sur~ members I] and I8 in effect constitute a shape faces of the corrugations I3 and Hi, and no‘ , stiffening plates such as 2| are required. Por that is of generally T-form in cross section. tions of the flanges are further cut away as in 20 On the outer side of the box, I provide'continu ous channels 20 disposed with their flanges abut? ting the outer surfaces of the corrugations I73 and welded thereto. ' Reinforcing plates 2| equal in length to the width of the corrugations M are 25 welded to the channels 20 before'the channel is, ‘secured to the box, the inner edges and ends of, the plates 2| being welded to the web and side walls, of the corrugations l4. Since the ?ller plates 2| are of short length 30 and do not extend across the outermost surfaces of the channels l3, there’ may be ?ow of heated dicated at 425, in order to permit vertical flow of > hot gas along the corrugations Hi. I In Fig. '11 I‘ show a structure wherein the out wardly-projecting corrugations are braced and strengthened by the elements 28 and 29 which correspond to and are mounted in the same manner as are the elements‘ l1 and i8 of Fig. 8. In this: structure, the outwardly-projecting cor rugations are provided withv reinforcing plates 30 and channels 3| that are substantially dupli cates of the members H and H3 or the members, gases upwardly along the corrugations l4, through 28 and 29. to be exposed‘to flow of heated gases although‘ throughout the peripheryiof the box. ' The members Hand 29 are preferably‘in hori- 1 paths behind the lowermost ?ange of the chan z‘ontal alignment with'the members 39 and 3|, nel 20, around the ends of the plates 2| and up wardly behind the upper ?ange of the channel, ' and since each of th'e'semembers is welded at its as indicated by the arrows in Fig. 1, thus per ends to the adjacent corrugation walls, they in mitting all portions of the outer side of therbox' ' effects form a stiffening channel extending reinforced by the channel and the plates 2|. ' ,40 The channels 20 not only serve to distribute distortions of the side walls to the various vertical corrugations, thus preventing excessive deforma tion ‘and ?exing of only certain corrugations, which would result in early cracking of the metal, but by reason of their form and arrangement they tend to restore the box to its original con tour after each heating and cooling cycle. This latter function occurs by reason of the fact that the inner edges of the ?anges of channels 20 are 50 in spaced relation to- the webs of the inwardly projecting corrugations I4, as shown more clearly in Fig. '7. As above stated,;the heated gases ?ow I claim as my invention: ' . < 1 I ' ' 1.‘ The combination with an annealing box 40, having corrugations formed in its walls, of stiff ening members consisting of channels secured at their ends to the sides of the corrugations, and reinforcing plates disposed within said channels and secured to the channels and to the corru gations. 2. The combination with an annealing box hav ing corrugations formed in its walls, of stiffening members comprising channel-like elements, and reinforcing elements secured to the inner sur-' faces of the channels and to the walls of the cor-, rugations, the reinforcing elements extending in upwardly through the corrugations, past the in directions parallel to the ?anges of the channel ner edges of the channels 20, which results in elements. comparatively rapid heating of those portions of 3. The combination with an annealing boxhav ing inwardly and outwardly-projecting corruga tions formed in the walls thereof, of stiffening members foreach of said corrugations, compris~ the channels 25 which are opposite to the corru gations M, because such channel portions are out of contact with the colder box surface and the heat is not readily conducted therefrom to the 45' ' ' ing channel-like elements disposed within the corrugations and secured thereto, the stiffening 60 box. The colder portions of the structure resist members positioned within the inwardly-project the tendency of these hotter portions of the , ing corrugations being in longitudinal alignment channel to expand under the initial heat, with with the stiffening members located within the 60 box wall nor to the metal contents within the the result that these hotter portions are placed 65 under high compression. ~ outwardly-projecting corrugations. . 4. The combination with an annealing bo'x hav After an annealing operation and during the ing vertically-extending corrugations formed in cooling cycle,,the said spaced portions of the its walls, of a stiffening element ‘of channel form channels 29 will cool more rapidly than those portions of the channels which are opposite to 70 and in contact with the corrugations l3. Conse disposed transversely of and secured to the cor rugations, and reinforcing plates secured to the channel and to the box at'points between the quently, those said spaced portions of the chan nels will tend to contract rapidly and exert such tensional forces as will be effective to return any heat-distorted portions of the box back to ap 75 proximately its original form. The webs 2| serve said corrugations. ' 65 ' 5. The combination with an annealing box hav ing corrugations of channel-like shape formed in the walls thereof, of channels extending trans versely of said corrugations and having portions 75. 3 2,115,416 7. The combination with an annealing box hav of their edges welded to adjacent portions of the corrugations and intermediate portions of said edges disposed in outwardly spaced relation to ing corrugated walls, of channels extending trans versely of said corrugations and having portions relatively depressed portions of the corrugations. of their edges welded to the outermost areas of 6. The combination with. an annealing box hav ing corrugated walls, of channels extending trans versely of said corrugations and having portions of their edges welded to the outermost areas of the corrugations and other portions spaced out 10 wardly from the depressed areas of the corruga tions, and reinforcing plates having their inner edges secured to the said depressed areas and their outer edges secured to the webs of the channels. the corrugations and other portions spaced out wardly from the depressed areas of the corruga tions, and reinforcing plates having their inner edges secured to the said depressed areas and their outer edges secured to the webs of the channels, the said reinforcing plates extending parallel to 10 the channels and ‘disposed approximately mid way between the ?anges of the channels. ' KENNETH J. DEAHL.