US2708511A - Runout table guide - Google Patents

Description

w. D. WILSON ETAL May 17, 1955 RUNOUT TABLE (EUIDE s sheets-sheet 1 Filed Aug. 5, 1949 and may. 11 36 022 jwzcziam May 17, 1955 w. D. WILSON ETAL RUNOUT TABLE GUIDE 3 Sheets-Sheet 2 Filed Aug. 5, 1949 a W a 5 W W a L e M w s w z 52:: w Q Y; 7 M WV May 17, 1955 w. D. WILSON ETAL RUNOUT TABLE GUIDE Filed Aug. 5, 1949 5 Sheets-Sheet 3 RUNOUT TABLE GUIDE Wash D. Wilson, Relay, and Fred C. Howland, Catonsville, Md., assignors to Revere Copper and Brass Incorporated, Rome, N. Y., a corporation of Maryland Application August 5, 1949, Serial No. 108,784 2 Claims. (Cl. 207-2) Our invention relatesto methods of and apparatus for extruding metal shapes.

Heretofore great difficulty has been experienced in extruding readily flowably metals, such as aluminum, at anywhere near reasonable speed without serious distortion of the extruded shape, particularly where the latter is formed with flanges or is of similar irregular crosssection. This distortion, it has been found, is caused by variations in the rates of flow of the metal through difierent parts of the die opening, some parts of such opening being of relatively restricted cross-section and presenting more surface friction to the flowing metal, while the other parts are of relatively less restricted cross-section and present less surface friction to the flowing metal. The distortion is quite marked when it is attempted, for example, to extrude at high speeds shapes of the cross-sections of the ordinary structural angleiron, channel-iron and the like, in which cases not only will the cross-section of the shape be distorted but the shape lengthwise thereof will be distorted transversely in all directions and will be twisted. Straightening of the shapes, even when possible, is an expensive time consuming operation, making it necessary heretofore in practice to extrude the shapes at slow speeds so as to reduce to a minimum the distortion and consequent necessity for a straightening operation.

The present invention has among its objects the overcoming of the above defects so as to enable shapes to be extruded at high speeds without distortion. The invention and other of its objects, however, will be best understood from the following description when read in the light of the accompanying drawings, while the scope of the invention will be more particularly pointed out in the appended claims.

In the drawings:

Fig. 1 is a longitudinal medial vertical section through part of an extrusion press according to the invention, with parts in elevation;

Fig. 2 is a plan of Fig. 1 on an enlarged scale, with parts omitted;

Figs. 3, 4 and are, respectively, sections on the lines 33, {#4 and 55 of Fig. 2 on an enlarged scale;

Fig. 6 is a section on the line 6-6 of Fig. 1 on an enlarged scale;

Figs. 7 and 8 are diagrams showing the application of the rolls of the construction shown by Figs. 1 to 6 to the shape shown in the last mentioned figures;

Fig. 9 is a diagram show g a cross-section of the shape according to Figs. 7 and 8 when distorted;

Figs. 10 and 11 are diagrams showing the application of the rolls of the construction shown by Figs. 1 to 6 to a modified form of shape;

Fig. 12 is a diagram showing a cross-section of the shape according to Figs. 10 and 11 when distorted; and

Fig. 13 is a diagram showing the application of the rolls of the construction shown by Figs. 1 to 6 to a further modified form of shape.

Referring to the drawings, the extrusion press is pro- 2,708,51 l Patented May 17, 1955 vided with a die 1 (Fig. 1) carried by a die holder 3. Abutting the right hand side of the die holder as viewed in Fig. 1, as will be understood by those skilled 'in the art, is a billet container (not shown) in which is a ram for forcing the metal of the billet through the die opening for extruding the elongated shape. As is usual in extrusion presses, the die holder carries a back-up block 5 for the die, the die holder being supported on a tool container 7 having the upstanding portion 9 between which latter and the die holder are positioned a die block 11 and adapter block 13. The press further comprises the elongated run-out table 15 the upper part of which is formed by a member 17 (Fig. 3) of channelshaped cross-section.

The elongated shape 1 to 8 as of channel-shaped transverse cross-section. It comprises the longitudinally extending flange-like parts 19 (see Fig. 7) each having opposite sides 21 and a free end surface 23. With respect to each flange-like part 19 the web 25 of the shape constitutes a second longitudinally extending flange-like part having the opposite sides 27 and 29, the latter being remote from the'free end sur faces 23 or" the flange-like parts 19. As shown, the web or flange-like part 25 has intermediate its width a raised portion 31 of channel-shaped cross-section, the upper side 33 of which may be considered as a continuation of the upper side 27 of the flange-like part 25.

Referring particularly to run-out table is a flat plate 35 which may be adjusted vertically and levelled by the screws 37 and 39 which are screw-threaded through the plate and bear at their lower ends on the top of the run-out table. For prevent-' ing movement of the plate-longitudinally of the run-out table, the screws 39 are provided at their lower ends with terminal portions 41 (Fig. fitting the central opening welded to the upper surface 3) received in and rotatably of the run-out table.

The plate 35 at spaced points lengthwise thereof is shown as carrying, adjacent wardly extending oppositely posts at their lower ends being welded to the plate;

its longitudinal edges, up-

These posts are shown as formed with slots 47 extending adjusted longitudinally and vertically relative to the post by means of the nuts 57 screw-threaded on the shank at opposite sides of the post,

between these nuts and the adjacent sides of the post.

posts 61 welded at their lower ends tween these posts at their welded at opposite ends to the plate.

of which vertically extends the portion 67 of an arbor 69 roll 71. These arbors may screw-threaded upper end nuts 73 screw-threaded on the arbors at the upper and lower sides of the cross-bars, a washer 75 being positioned between each nut and the adjacent side of the crossbar. The arrangement shown is idle roll 71 is a post 45 carrying an idle roll 55. As illustrated, the two slots 65 of each crossbar 63 are laterally olfset relative to each other a distance which is very slightly greater than the purpose of which is to permit by the cross-bar to be placed diameter of a roll 71, the the pair of rolls 71 carried 8 being extruded is shown in Figs.

Figs. 1 to 6, carried by theof a washer-like member 43 positioned posts 45, the

the end flanges 53 of which rotatably support an idle roll 55. The shank may be' rotatably carrying an idle be adjusted vertically and transversely relative to the cross-bars by means of the.

such that adjacent each' in a narrow space, for example the space between the two flange-like parts 19 of the shape S, when that space is of less width than twice such diameter.

As further shown, at other spaced points along the plate 35 adjacent its opposite edges are other opposite posts 76 (Figs. 1 and 6) between which are positioned lower idle rolls 77 carried by arbors 79 supported at opposite ends in bearings 81 carried by the posts. The upper portions of the posts are shown as formed with vertical slots 83, and on the upper ends of the posts are detachably secured, by means of bolts 85, blocks 87 bridging these slots and provided with screw-threaded openings 89 (Fig. 6) which receive the screw-threaded shanks 91 adapted to be rotated by means of handwheels 93 (Figs. 1 and 2). Mounted for vertical sliding in the slots 83 are bearings 95 having a detachable swivel connection, of common construction, to the lower ends of the shanks 91 so that by rotating the latter the bearings may be adjusted vertically upward and downward. Mounted in the bearings 95 are the opposite ends of arbors 97 which support the upper idle rolls 99.

As shown, two of the roll sets 77, 99 are provided. Intermediate these sets is shown a roll 101 (Figs. 1, 2 and This last mentioned roll iscarried on an arbor 103 (Fig. 5-), the central portion of which latter is screwthreaded and the end portions of which are received in bearings 105 slidably mounted in the vertically extending slots 107 of posts 1119, these posts being carried by the plate 35 adjacent its opposite edges, the lower ends of the posts being welded to the plate. For adjusting the arbor vertically relative to the posts the bearings are secured, by swivel joints of common construction, to the lower ends of screws 111, these screws extending through the screw-threaded perforations of blocks 113 removably secured to the upper ends of the posts by bolts 115 (Fig. l), the screws at their upper ends being provided with handwheels 117 for turning them. The roll 101 may be adjustably positioned longitudinally of the arbor by means of the removable spacers 119 positioned between the opposite sides of the roll and nuts 121 screw threaded on the arbor.

As further shown, the plate 35 at its end adjacent the die carries a pair of vertically extending plate like members 123 welded at their lower edges to the upper side of the plate 35, these members 123 converging toward each other and serving to prevent undue deflection of the advancing free end of the shape as it leaves the die at the initial portion of the extrusion operation. Also secured to the plate at its upper side by means of screws 125 (Figs. 2 and 3) are shown blocks 127, 129 and 131, the block 127 having its upper surface 133 (Fig. 1) downwardly inclined toward the die. These blocks, which are preferably formed of graphite, so as to constitute anti-friction surfaces softer than the metal of the shape, serve to guide the advancing end of the shape into cooperation with the horizontal rolls at the initial part of the extrusion operation.

As best shown in Fig. 7, each upper horizontal roll 99 engages the free end surface 23 of each flange-like part 19 of the shape 8, while each cooperating lower horizontal roll 77 engages that side 29 of the other flange-like part which is remote from the free end surface 23. The horizontal roll 101 engages the upper side 33 of the raised portion 31 of the shape, which side operatively forms part of the upper side 27 of the flange-like part 25, so as to hold the flange-like part 25 against the lower roll 77. As best shown by Fig. 8, the vertical rolls 55 and 71 engage the opposite sides 21, respectively, of the flangelike parts'19. As there are a plurality of sets of the horizontal rolls 77 99 operating on the shape at spaced points along its length, and a plurality of sets of vertical rolls 55, 71 operating on the shape at spaced points along its length, the shape is effectively held against deflection and leaves the series of rolls exactly straight, these rolls acting to confine that portion of the length of the advancing shape which is adjacent the die against deflection in all directions transverse thereto including twisting of the shape and deflection of its parts as viewed in transverse crosssection. If the rolls were not provided, and it were attempted to extrude the shape rapidly, the shape would be approximately of the transverse cross-section shown by Fig. 9, and further would be bent sinuously transversely both vertically and horizontally and would be twisted along its longitudinal axis, making it practically impossible to straighten it by a levelling operation. In practice it has been found that by use of the present invention the number of feet of the shape extruded per hour may be more than doubled as compared to prior methods, and without the necessity for a straightening operation.

it will be understood that the shape extruded may be of various cross-sections, and that the rolls will be adjusted to suit the cross-section of the particular shape being extruded. For example, the shape may be that shown at SS in Figs. 10 and 11. This shape 83 is generally similar to that shown by Figs. 7 and 8 except that the flangelike part 19 is shown as formed with a short laterally extending flange 135 at its free edge, the upper surface 137 of this flange 135 constituting the free end surface of the flange-like part 19 with which the roll 99 contacts. Further, the central portion of the shape 35 is shown as provided with a rounded raised portion 139, instead of the flat raised portion 31 of the shape 8, for which reason, instead of a single horizontal roll 101 being employed for holding the shape in contact with the lower horizontal roll 77, a pair of vertical rolls 141 may be substituted for the roll 191, each roll 141 engaging the web or flange-like part 25 of the shape at opposite sides of the raised portion 139. In respect to the shape SS, the vertical roll 55 will be adjusted, as shown in Fig. 11, to engage the outer end of the flange 135 of the flange-like part 19. The flange-like part 143 of the shape 88 opposite the flange-like part 19 is shown as of less vertical height than the latter, and consequently cannot be engaged by the upper horizontal roll 99. However, the flange-like part 143 being confined by the vertical rolls 55 and 57 as shown in Fig. 11, and a horizontal roll 141 being applied to the shape adjacent the flange-like part 143 for holding it in contact with the horizontal roll 77, the deflection of the shape adjacent the flange-like part 143 is eifectively prevented. In absence of the rolls the shape 88, if it were attempted to extrude it rapidly, would be distorted transversely as shown in Fig. 12, and besides would be sinuously deflected transversely, horizontally and vertically and would be twisted along its longitudinal axis, making it practically next to impossible to straighten the shape.

As shown in Fig. 13, the shape SSS is in the form of an angle-iron having the longitudinally extending flangelike parts 145 and 147,- the upper roll to engage the free end surface 149 of the flange-like part 145, while the lower roll 77 engages the side of the flangelike part 147 remote from this free end surface. As before, the roll 101 engages the upper side of the flange-like part 147 to hold that part against the roll 77, while the two rolls 5S and 71 engage the opposite sides of the flange-like part 145.

It will be understood that within the scope of the appended claimswide deviations may be made from the form of the invention described without departing from the spirit of the invention.

We claim:

1. Apparatus for producing at high speed an elongated aluminum shape presenting in transverse cross-section pairs of longitudinally extending flange-like parts at approximately right angles to each other joined at a longitudinally extending corner of said shape, parts has a free end surface in parallel relation to the other of said parts, which apparatus comprises an extrusion die formed with a die opening through which 99 being adjusted one of which the shape is adapted to be extruded from an aluminum billet, such die opening in transverse cross-section having portions identically complementary to said flange-like parts, free end surface and corner of said shape as viewed in transverse cross-section; means preventing distortion of said parts of the shaft caused by different speeds of flow of the aluminum through different parts of said portions of said die opening during the extrusion operation so as to produce a straight untwisted shape in which said parts, free end surface and corner in transverse crosssection are identical with said portions of said die opening viewed in transverse cross-section, said means comprising groups of closely adjacent cylindrical idle rolls rigidly supported for axial rotation adjacent the discharge side of said die opening, said rolls having their axes at right angles to the direction of the length of the shape adapted to be discharged from the die opening; said groups of rolls comprising laterally spaced pairs of operatively opposed rolls of which a roll of each pair is adapted to engage said free end surface of one of said flange-like parts and the other roll of each pair is adapted to engage the remote side of the other of said flange like parts; said groups also comprising further laterally spaced pairs of operatively opposed rolls laterally spaced from and at right angles to the first mentioned pairs, the rolls of each of which further pairs are adapted to engage the opposite sides, respectively, of the flangelike part having said free end surface; the cylindrical surfaces of the rolls of said groups being adapted to contact said free end surface and sides of said flange-like parts along lines which lie in the same planes as the surfaces of said portions of said die opening which are complementary to said free end surface and sides, whereby said rolls in respect to said free end surface and sides form a rigid pass for the shape aligned with the rigid pass formed by such surfaces of said portions of the die opening.

2. Apparatus for producing at high speed an elongated aluminum shape presenting in transverse cross-section pairs of longitudinally extending flange-like parts at approximately right angles to each other joined at a longitudinally extending corner of said shape, one of which parts has a free end surface in parallel relation to the other of said parts, which apparatus comprises an extrusion die formed with a die opening through which the shape is adapted to be extruded from an aluminum billet, such die opening in transverse cross-section having portions identically complementary to said flange-like parts, free end surface and corner of said shape as viewed in transverse cross-section; means preventing distortion of said parts of the shape caused by different speeds of flow of the aluminum through different parts of said portions of said die opening during the extrusion operation so as to produce a straight untwisted shape in which said parts, free end surface and corner in transverse cross-section are identical with said portions of said die opening viewed in transverse cross-section, said means comprising groups of closely adjacent cylindrical idle rolls rigidly supported for axial rotation adjacent the discharge side of said die opening, said rolls having their axes at right angles to the direction of the length of the shape adapted to be discharged from the die opening; said groups of rolls comprising laterally spaced pairs of operatively opposed rolls of which a roll of each pair is adapted to engage said free end surface of one of said flange-like parts and the other roll of each pair is adapted to engage the remote side of the other of said flange-like parts; said groups also comprising further laterally spaced pairs of operatively opposed rolls laterally spaced from and at right angles to the first mentioned pairs, the rolls of each of which further pairs are adapted to engage the opposite sides, respectively, of the flangelike part having said free end surface; and said groups further comprising a roll operatively opposed to the last mentioned rolls of the first mentioned laterally spaced pairs of rolls, which roll is adapted to engage the side of the flange-like part opposite that engaged by the said last mentioned rolls of said pairs; the cylindrical surfaces of the rolls of said groups being adapted to contact said free end surface and sides of said flange-like parts along lines which lie in the same planes as the surfaces of said portions of said die opening which are complementary to said free end surface and sides, whereby said rolls in respect to said free end surface and sides form a rigid pass for the shape aligned with the rigid pass formed by such surfaces of said portions of the die opening.

References Cited in the file of this patent UNITED STATES PATENTS 327,098 OBrien Sept. 29, 1885 1,393,580 Sehranz Oct. 11, 1921 1,673,787 Frahm June 12, 1928 1,812,248 Oberg June 30, 1931 1,902,975 Sparks Mar. 28, 1933 2,029,800 Templin Feb. 4, 1936 2,361,729 Nedden et al Oct. 31, 1944 2,400,690 Fisk .May 21, 1946 FOREIGN PATENTS 559,450 Great Britain Feb. 21, 1944

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