US2260375A - Straightening machine - Google Patents

Description

Oct. 28,- 1941.

B. P. HAZELTINE STRAIGHTENING MACHINE 2 Sheets-Sheet 1 Filed May 14, 1941 GZVWZ/ M111, Ma 11v INVENTOR.

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Patented Oct. 28, 1941 UNITED STATES PATENT OFFICE STRAIGHTENTNG MACHINE Benjamin Hazeltine, Wheeling, W. Va. Application May 14, 1941, Serial No. 393,345

(cuss-54) 14 Claims.

This invention relates to the straightening of cylindrical blanks suchas tubing, rods and-like articles of circular cross section, and more particularly to apparatus in which such blanks are straightened by the threads or flights of rotating screws. a

This invention is especially applicable to hot straightening as shown in my Patents Nos.

1,758,699 and 2,199,130. The machines shown in those patents are quite limited by the pitch of the straightening screws as to-the sizes of blanks"- that they can straighten. Thus, a straightening machine for small diameter, blanks will not straighten large blanks, and vice versa, wherefore it is necessary to have straightening machines of different sizes. This greatly increases the cost of straightening and requires considerably more floor space.

It is among the objects of this invention to provide a straightening machine of the general character disclosed in my above-mentioned patents which can be adjusted to accommodate blanks of many different sizes and which can straighten relatively long blanks'as wellas short ones.

In accordance with this invention a plurality of 5 tacts. The engagement of the blank on Opp site sides by the screw flights creates a forward thrust, due to the rear flights, which is opposed by the reaction of the forward flights, and the revolving flights cause the blank to rotate while moving it lengthwise and toward the delivery ends of the screws so that the thrust acting upon longitudinally spaced points along the blank is applied progressively to its periphery from end to end. In the case of a bent or kinked blank moving through the flights, unevenlyfdis- 'tributed stresses will be created due tothe tendency for the points of support to be out of line, and as the blank rotates the increased stresses applied to the bent portions act around the blank to bring it into line. To accommodate blanks of different outside diameters, the screws are so mounted that they can be swung laterally so that, in effect, their pitch is increased or decreased for receiving and straightening blanks of larger or Preferably, there are located between some of the screws rollers that are screw is journaled in a bearing supported in "manner to be described presently.

screws. As the blanks travel longitudinally of the screws they move up onto these rollers until the blanks are freed from the grip of the screws, whereupon the rollers quickly move the blanks longitudinally across the screws back toward the end of the machine at which they first engaged the screws so that they will not-leave the machinesbefore theyhave traversed the full length 'of the screws.

The preferred embodiment of the invention is illustrated in the accompanying drawings in which Fig. 1 is a plan view of my straightening machine; Fig.2 is a combined side view and vertical section taken on the line II-II of Fig. '1; Fig. 3 is an enlarged transverse section taken on the line III'--III of Fig. 1; Fig. 4 isan enlarged fragrnentary view taken on the line IV--IV of Fig. 1; and'Fig'S'is an enlarged fragmentary end view taken on the line V-V of Fig. 1. 1 Referring to the drawings, a plurality of substantially parallel screw flights I are disposedin laterally spaced relation in a common horizontal plane. series of screws that end of each screw has its projecting shaft journaled in the upper portion of a gear box 2 in which a bevel gear 3 is rigidly mounted on the shaft. This gear meshes with another bevel gear 4 on the upper end of a vertical shaft 6 journaled in the lower portion of the gear box from the bottom of which the shaft projects. Mounted on the lower end of this shaft is a bevel gear 1 that is driven by a similar gear 8 mounted on a horizontal line shaft 9 extending the full length of the machine. As shown in Fig. 4, this line shaft is journaled in housings ll that rest on a suitable foundation and is rotated by a large bevel gear 12 at its center driven by a bevel pinion l3 from a motor l4 disposed at the side of the machine. The opposite endof each The screws are preferably arranged in spaced groupsand disposed between the groups of gear boxes 2 are brackets 15 projecting therefrom. Mounted on some of these brackets are electric motors I! each of which drives a roller l8 journaled on a horizontal axis at the entry end of the adjacent screws. The tops of these rollers are above the tops of the screws so that when a blank, such as a pipe, is deposited on the rollers at the right-hand end of the machine as viewed in Figs. 1 and 2, they will carry it lengthwiseof the machine to the opposite end thereof where it will strike a suitable stop 1 9. 'Due tothe length rotated in a direction opposite to that of the Q5 of the p pgs it s nOt-necessarythat the rollers As shown in Fig. 3, at one side of the r horizontal arm 23 mounted at the back, of the trough at the'upper end of a vertical rotatable" shaft 24 the lower end of which carries a lat-. 7 Connecting these levers are rods 21 .which are periodically erally projecting lever 26 (Fig. 3).

pulled by an electrically operated mechanism. 28 ,(Figs. 1 and '2) at one end of the machine in V Q fi i .t s in arm i ir h trough an ther b u h. p n IUPQYth sbreWsA j' between some of the screws .are cro'ss bars :29 1) which can be raised by handleye'rs 30 suitably connected to them at one endfso that in e case anything go es wrong with the machine the pipes can be raised bythe oii t of vengage- ;rnent withjthe screws to avoiddamag'el Itis a feature of this invention'th at this niachine can be Y adjusted to accommodate blanks of larger or smaller outside diameter than it willlaccommodatewhen the screws are in the Aposition shown; in Fig. 1'. Accordingly, "the screws are so mounted that one venfd can 'b'e swung laterally in either direction as indicated bythe broken lines beside the end screws, To permit this [lateral adiustment the lower" portion of each gear be 2 is encircled by a'horz'ontal flange 36 that rests onman annular, shoulder .31. formed in an upwardly projecting cylin- ,dric'al portion of shaft housing ll, as shown in zliigs. 3'and 4. The gear box is th 'us'adapted to be t rned pn a; e t ca e irq iv 9 h shait housing supporting it. The bearing 38 for the other end, of each screw rests 'o'nfa di'aW- plate-39 extending the run length of the Tina- 'chine and slidably supported on a horizontal .I eamjl mounted on a suitable foundation. These be'a rings 38' are pivotally connecte'd t'o the .QlfiW'PlMQbYg in st l @Pi 2.. P Q i i -,.d 2.w ,w rd r 2 19 he btt m. f h 'be fifi in an o e n inlth dr wl te: T e,

imitat -thu e1 ced e mie d i s apa t sq a hQ mWS wi b'e m nt'ei i tiliel'when adjusted..laterally. The bearings are h ld. t e r ws me ns 9i t e '4 Iconnecting thebearings to gear box z'a's shown m i zeae, ,N l-

, As s hown inFigs. 1 and 5, rigidly mounted on one end of the -dr transverse teet nfits upper surface meshing with a pinion 8 mounted on 'a 'shaft msj'our- I fiiai'ed ayoke ifiqfektendingacross'tlie top of t draw-plate andsupported .by atra'ns'verse thi spondingdirefgtion the ends i re pivotallyattalhedfto; the p I y p f p S iijovinfnt the ampra el infeeare h eji f si 'a .l w 'Qn t iq i %t fi a thereof. fonseduently, "the iackusufiaae wider aw plate is 'a rack zis having v plate either itof, the left'onrig'ht; thereby than pinion 46 sothat it will remain in engagement with the pinion as the rack moves laterally beneath it.

When the draw-plate is moved to the right as viewed in'Fig. lvthe pitch of the screws is, in effect, decreased sothat they can grip and effectively straighten smaller pipes. If the, drawplateis moved to the left the pitch of the screws is increased so that larger pipes can be accommodatedbetween their flights and beistraightened thereby, I

Another feature of this invention of the groups'of screws, the tops dftlie '25 rollers extending up between the screws fair that the rollers, can in the pipes lengtm cfhlne'at whicfri they'starte'd their travel across the. 'iirig'sjsrmoiiiited an a tablefiti and are driven'by chain and sprocket drives 59ffrom amotorffiil suspended from'one endof the table. The end of each roller adjacent the entry end 'oftli'e is tapere'd'sothat a's'a pipe is moved l'aterally by the screws it'will be ron u up the ta- ,pered ends of the rollers an'do'iitothe cylindrical portions thereof out of the "grip of thesc'rew t 40 nights. The'se rollers fare rotated quite rapidly vso that 'as soon a's the pipe is "released from the gag [pf t e screwsitis quickly moved back ;t o the left-handend ofthe machine whereit is i stopped b'y'sto'p [9. As soon as the piperolls'off theqppositeend of the rollers it is again gripped .byitherscrews and carried back" towar the righthand end of the machinewhich "a magpie; will reach substantially at the time itleaves the delivery ends ,of the screws. 1 Thus, 'a'ff relatively short straightening machine is adapted. "to straighten relatively long 'pi'pesl I I r f 1 Sh r ip s.,..h h o n h tbb tidied back :across the table ;by rollers 56, -or forp es ,o lar er. smalle d ameter which in t, ss ew at d rent l e v raised or lojwered by levers. is r des rable to be abl e'to"ad'jfist'th" 'ol ler 70 I tafbie longitudihally when jiiitfallysb that: s will n'btst the roller According b'i'y l lengthwise f th'eireo threadably meant-ed "in" on t is that, re- "gardless of the lengthof the pipes being straighti V problem isfsoiv'ed by this invention by mounting rollers 56 between at least enough to support pipes out of gripping r a tion with the screw flights' as shown in'F1g.-3,

wise back toward thefleft-liahdnd of the mascrews. The rollers are journal'ed in team :rotatably mounted in an upright bearing. 13. at the adjacent end of the frame. This screw :can be tu rned'by a hand-wheel I4.

Although only one row of rollers 56 has been illustrated, it will be obvious that for a shorter machine or for still longer pipes one. or more additional rows of like rollers can-be mounted in the same manner between the screws so that described what I now consider to represent its best. embodiment. However, I desire to have it understood that, within the'scope of the appendediclaiins, the invention may be practiced, othera wise than as specifically illustratedand described.

I claim: I

.1. A machine for straightening cylindrical blanks, comprising a plurality of laterally spaced screwflights disposed in a common plane, said flights being formed to receive a blank transversely thereofand to engage it on opposite sides and means for swinging the screws on .axes'perpendicular to said plane to position said flights for receivingand straightening blanks of larger or smaller outside diameter.

2. A machine for straightening cylindrical blanks, comprising a plurality of laterally spaced screw flights disposed in a common plane, said flights being formed .to receive a blank transversely thereof and to engage it on opposite sides at longitudinally spaced points, means for rotating said screws to rotate and straighten the blank whileconveying itlongitudinally of thescrews,

and 'means for swinging all of the screws the same number of degrees on axes perpendicular to said plane to position said flights for receiving and straightening blanks of larger or smaller outside diameter.

3. A machine for straightening cylindrical blanks, comprising a plurality of laterally spaced parallel screw flights wound in the same direction, said flights being formed to receive a blank transversely thereof and to engage it on opposite sides at longitudinally spaced points, means for rotating said screws to rotate and straighten the blank while conveying it longitudinally of the screws, and means for swinging all of the screws laterally in the same direction to position said flights for receiving and straightening blanks of larger or smaller outside diameter.

4. A machine for straightening cylindrical blanks, comprising a plurality of laterally spaced parallel screw flights Wound in the same direction, said flights being formed to receive a blank transversely thereof and to engage it on opposite sides at longitudinally spaced points, means for rotating said screws to rotate and straighten the blank while conveying it longitudinally of the screws, and means for simultaneously swinging all of the screws laterally in parallel relation to position said flights for receiving and straightening blanks of larger or smaller outside diameter.

5. A machine for straightening cylindrical blanks, comprising a plurality of laterally spaced screw flights disposed in a common plane, said flights being formed to receive a blank transversely thereof and to engage it on opposite sides at longitudinally spaced points, means for rotating said screws to rotate and straighten the blank while conveying it longitudinally of the screws,'meanspivotally mounting one end of each screw on an axis perpendicular to said plane, and means for swinging the opposite end of each screw around said axis to position said flights for receiving and straightening blanks of larger'or smaller outside diameter. Y

6. Aj machine for straightening cylindrical blanks, comprising a plurality of laterally spaced screw flights'disposed in a common plane, said flights being formed to receive a-blank transversely thereof and-to engage it on opposite sides at longitudinally spaced points, meansfor rotating said screws to rotate and straighten the blank while conveying it longitudinally of the screws, means for swinging thescrews on, axes perpendicular to said plane to position said flights for receiving and straightening blanks of :larger or smaller outside diameter, and means between at least some of said screws for raising the blanks out of straightening-relation with said flights and for moving the blanks longitudinally across the screws. I I

7. A machine for straightening cylindrical blanks, comprising a plurality of laterally spaced screw flights disposed in a common plane, said flights being formed to receive a blank transversely thereof and to engage it on opposite sides at longitudinally spaced points, means for rotating said screws to rotate and straighten the blank while conveying it longitudinally of the screws, means for swinging the screws on axes perpendicular to said plane to position said flights for receiving and straightening blanks of larger or smalleroutside diameter, rollers between at least some of said screws for raising the blanks out of straightening relation with said flights, and means for driving said rollers in adirection opposite to the direction of rotation of the screws to move the blanks longitudinally back across the screws in-the direction from whence they came.

8. A machine for straightening cylindrical blanks, comprising a plurality of laterally spaced screw flights disposed in a common plane, said flights'being formed to receive a blank transyersely thereof and to engage it on opposite sides tering ends of the screws for temporarily raising the blanks out of straightening relation with said flights, and means for driving said rollers in a direction opposite to the direction of rotation of the screws to move the blanks longitudinally back across the screws in the direction from whence they came.

9. A machine for straightening cylindrical blanks, comprising a plurality of laterally spaced screw flights disposed in a common plane, said flights being formed to receive a blank transversely thereof and to engage it on opposite sides at longitudinally spaced points, means for rotating said screws torotate and straighten the blank while conveying it longitudinally of the screws, means for swinging the screws on axes perpendicular to said plane to position said di meters, I 7 1 p I machine for Straightening eyundneal- I blanks act of straighten ng relation with as flights, means rer adjusting the rollers laterally to accord with the "swinging "or the screws, and means for drivingsaid miners in a directio'n o'p to move the blanks longitudinally back across the screws in the direction from whence they came.

10. A machin for straightening cylindrical osite to the direction of rotation or the screws b anks, com rising a'piurant enateran spaced screw flights disposed in a common horizontal plane, said flights being formed tore'ceive abla'nk transversely thereof and to engage it on opposite sides at longitudinally spaced poimgmeans for rotating said screws to rotate and straighten the blank while conveying it longitudin'any of the blanks, 'qemprisin a plurality of laterally-spaced screw flights disposed in a cornr'noh p ane, said flights b'emgrormed to receive a blank transversely thereof and to engage it on opposite sides at longitudinally spaced paints, lllflli$ fol "rotating said screws to rotate and straighten the 1 blank While "conveying it longitudinally or the sc ews, ajshiftin g mem er moyabie in I said plane and located adjacent one end of the, screws,

inea'n's pivotally mou'n'ting the adjacent ends of the screws in said member on aXes perpendicular to saidpl'ane, and means 'for sievin said member in said plane to simultaneously-swing all'o'f'the screws "laterally to positibn fs'ald flights f oi ieceiving and straightening blanks of different 12'. blanks, comprising pllir'ali'fiy er lateral-1y spabed rew flights disposed "in a" cbhimh pl-aiie, safe fiights'heingformed to receive a blank transverse- 1y thereof 'and'to engage it on opposite sides' -at longitudinally spaced points, means for rotating said screws to rotate and straighten the blank while conveying it longitudinally of the screws,"a

slide plate located adjacent one end of the'screws,

bearings for said ends of the screws and pivotally mounted in said plate-,"and means for sliding'said plate in said plane to simultaneouslyswingalloi the screws laterally to position said flights for receiving and straightening blanks of, different diameters.

13; A machine for straightening cylindrical blanks, comprising a plurality of laterallyspaced screw 'flights' disposed in a common -pl-'ane,*said flights being formed to receive a blank transversely thereof and to engage it on opposite sides at'longitudinally' spaced points, means 'for rotating said screws to rotate and straighten-the blank whileconveying it longitudinally ofthe screws, a

slide plate located adjacent oneen'd 'of'the screws,

hearings for said ends of the screws-and pivotally mounted in said plate, a rack mounted on said plate, a pinion meshing with therack, and means for driving the pinion to slide said plate in said plane whereby to simultaneously swing all of the screws laterally 'to position said-flights for receiving and straightening blanks of difierent diameters.

14. A machine for straightening cylindrical blanks, comprising a plurality of'laterally-spaced screw flights disposed in a common plane, said flights being formed to receive a blank trans 'versely thereof and to engage it on opposite sides at longitudinally spaced points, a gear box adjacent one endo'f each screw mounted for rotation on an axis perpendicular to "said plane, the end of the "adjacent screwproj'ecting into each gear box, a source of power, gearing operatively connecting said source of power to the end of the screw projecting'into each gear box, and meansfor swinging the opposite endsof'the screws on the axes of the'geariboxes to position'said'flights for receiving and straightening blanks of different outside diameters.

BENJAMIN, -P. HAZELTINE.

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