US1463634A - Cooling bed - Google Patents

Description

July 31, 1923- G. SMITH COOLING BED Filed oct. 22 1921 Fig. 2 is a sectional view on the line 22' in i ntented July 31, 1923,

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Application filed October 22, '1921 Serial No. 509,682

To all whom it may concern:

Be it known that I, GEORGE- MiABSHALlL SMITH, a citizen of the United States, resid-' ing at Chicago, in the county of Cook, State of Illinois, having invented certain new and useful Improvements in Cooling Beds, do

hereby declare that the foll wing is-afull,

clear, and exact description-of the same.-

My invention relates to cooling beds used in handling hot'metal bars as they are delivered from the reducing-rolls of a rollingmill and consists in-the. novel andu'se'ful constructions herein described and then pointed-out in the appended-claims.

In the accompanylng drawings, which illustrate a practical embodiment'ofthe features of my invention and in which the same reference numerals indicate similar parts in the'difierent views, Rig. 1 is atop planview of a longitudinal section or ortion of a cooling bed equipped with my invention, the metal bars under treatment being shown brokenaway for convenience of illustration;

Fig. 1; Figs. 3 and 4: are detail sectional views on the lines 3-3 and 44= respectively in Fig. l, and Fig. 5 is a diagrammatic view to show certain arrangements of parts.

The objects of my invention are to provide certain improvements in cooling beds for metal bars whereby-the barsas they are moved down the-inclinedmetallic skids are subjected to minimum contact therewith to reduce their chilling and enable their surfaces that have been in temporary contact with the skids to be restored to the same temperature as the adjacent metal of the bar by the conduction of the heat from the hotter to the chilled colder part of the bar, and also whereby the bottom bar of a pack on the stationary rack-section of the bed is subjected to minimum contact with the metallic troughs or pockets to allow theheat from the bars in the center of the pack to anneal it. Obviously the term bar as used herein includes all such shapes as rods andother forms of metal which are usually long in proportion to their width or thickness.

. a run-out table comprising alon cons-shaped feed-rolls A, the peripheries of rWhlCh project through openings, into the trough and serve to convey the metal bar' as it'is delivered from the reducing-rolls.

It is to be understood that the trough is usually long enough to accommodatea 300 foot bar, and that the cooling bed, of whose in ly extended.

he inclmed bed'B constitutes the escapetory to theirbeing cutinto suitable lengths,

and consists of a series of rigid inclined skid beams B upon. Whichthe bars are delivered from thetrough. Eac-h skid beam is pro- .vided witha series of'vertical ribs] or flanges B B 13 13, B, and-B, arranged longi-.

tudinally on its upper face in staggered re} length only a section is shown, is correspond.

lation; preferably the disposition of these flanges is such that alternate flanges are not in alinement lengthwise of the beam, for

exampleas shown in Figs. 1 and 3. These flanges are narrow and project sufficiently above the beams to form skids or ways that hold the bars out of contact with the beams.

Between the beams B are journaled in the bed a .series of rocking-shafts'C parallel with the beams and having radial arms C,

C and C extending therefrom. The arms (1 on the ends of the shafts are arranged to pass through open-end slots a in the trough A so that. upon oscillation oft-the shafts they will transfer the bar out of the trough to the bed. The arms C on each sha ft are arranged in a plane atright angles with the plane of the arms C upon the same shaft, and each series of arms is also arranged in a straight horizontal row extending lengthwise of the bed so that the hot metal bars will bejpreserved in straight lines Suitable mechanism which is well known and forms nopart of my present invention, and so need not be here shown and described, actuates the rocking-shafts so that'they arersimultane-ously rocked back and forth one-quarter of a revolution at each movement of the reciprocating mechanism, carrying the series of radial arms C and the ser es of radial arms C alternately into a vertical position with their ends projectin ashort distance above the inclined beams arms C in Fig. 2, so that the arms which extend in a vertical-position will form a,

, as represented bythe row of dogs arranged in a'straight horizonfrom the last row of flanges B upon the i111 clined guides B at the lower end of the skid-section ofthe bed B by which they are delivered to the initial row of pockets of the rack-section of the cooling bed.

The rack-section of the cooling bed is composed of a series of parallel stationary racks D arranged respectively in line with the series of skid-beams as shown in Fig. 1. Each rack is provided with a series of troughs or pockets D which are V-shaped in crosssection, each series of pockets being arranged in a straight row lengthwise of the bed to preserve the hot bars in straight lines. Suitable mechanism of any known construction may be employed to lift the bars from each pocket and deposit them in the next one, and when the bars are to be arranged in packs m in the pockets suitable mechanism of known construction may be employed to deliver the bars from the skid-section of the.

bed to the first row of pockets in the racksection so that they will be disposed therein in a pack as shown; mechanisms for both purposes are now well-known and need not be here described, and devices for feeding the bars forward upon the racks from one line of pockets to another are generally designated at D Each of the first three pockets in'each rack is provided with a vertical flange D on each of its inclinedfaces,

and the flanges of eachrack are arranged in staggered relation along its length. and preferably the disposition of these flanges is such that neither flange of any pocket is in line with a flange of an adjacent pocket, as shown in Fig. 5. Also, preferably the racks are wider than the skid-beams and the flanges of each beam and its alined rack are staggered along the longitudinal line of each such couple, as shown in Fig. 2.

In cooling beds as heretofore constructed, so far as I am aware, the bars while on the skid-beams restedon the flat surface thereof which provided a bearing several inches wide and as the same portions of the hot bars were in contact with the cold beams during the entire period of their travel down the inclined section of the bed these portions became chilled. Also, as the racks of such previous beds were formed with their bar-supporting surfaces of ap roximately the same width as the skid-surfaces of their beams,

of the hot bars were further chilled below aeaeaa the temperature of the adjoining metal inv the bars while they rested on the racks; and furthermore, the face of the bottombar an edges of the several bars in a pack on the racks were cooled so fast by the colder metal of the racks drawing heat from them faster than they could absorb'heat from the pack that the heat from the center bars of-the pack was not sufiicient to evenly annealth'em.

The general theory of annealing packs of hot bars, as for example where'the bars are 1ntended for use in making vehicle springs or other parts requiring a standard of hardness, is that the heat from the center of the pack will anneal its surfaces, and in the use of previous machines such as just described the effect of the racks was to prevent the contacting portions of the bottom bars of the packs from annealing to the same degree of hardness as the rest of the bar. The crit- By my invention I obviate both of these,

passing down the 1 defects. The. bars while inclined section of the be reston the narrow flanges, and as these flanges on each beam are staggered in the line of travel of the bar along the beam the portions of the bar contacting with the skid are changed as the bar moves .down it. This enables each small portion of the bar that has been in contact with the skid and so momentarily chilled to be reheated to the temperature of the other parts of the bar by the exchange of heat by conduction from the non-chilled to the chilled portion. llhe portion chilled by contact with any one of the flanges on the beam is so small and the contact is so momentary'that the heat conduction from both sides of it restores its temperature to that of the rest of the bar while another portion is in contact with thesucceeding flange, and the end flange B is so arranged that the portion of the bar in contact with it is remote from any immediately preceding.

chilled portion so that the latter will be reheated by conduction while the bar is passing its its

gree; they decrease the extent of the hot surfaces exposed to the cold metal of the racks and allow the bars in the center-0t the pack to'anneal the others. The bars are carried across the bed with a minimum of chilling until they reach the pocket where they are vbelow the critical temperature; in practice beams provided with skid-flanges on theirupper faces, the flanges on each beam being arranged longitudinally in staggered relation, and means to feed the bars successively along the flanges lengthwise of the beams.

2. In a cooling bed for metal bars, the combination of a series of inclined skidbeams provided with skid-flanges on their upper faces arranged in horizontal rows lengthwise of the bed, the flanges on each beam being staggered in different planes lengthwise thereof, and means to feed the bars along the beams whereby they are successively carried by the horizontal rows of flanges.

3. In a cooling bed for metal bars, the combination of a series of rackseach provided with a series of pockets, flanges on certain of the pockets of each rack arranged in staggered relation to each other, and

means to move the bars along the racks from one pocket to an adjoining one.

4. In a cooling bed for metal bars, the combination of a series of racks each provided with a series of pockets, a plurality of pockets at the receiving end of each rack having flanges arranged in staggered relation to each other, and means to move the bars along the racks from one pocket to an adjoining one.

5. In a cooling bed for metal bars, the combination of a series of inclined skid beams forming the first section of the bed provided with skid-flanges on their upper faces, the flanges on each beam. being staggered in different planes lengthwise thereof,

means to feed the bars'along the flanges, a.

series of racks forming the second section of the bed and provided with a series of pockets, flanges on a plurality of the pockets at the receiving end of each rack arranged in staggered relation in each pocket and means to move the bars along the racks from one pocket to an adjoining one.

In testimony whereof I afiix my signature.

GEORGE MARSHALL SMITH.

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