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US2223039A - Method for elongating metal blanks - Google Patents

Method for elongating metal blanks Download PDF

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Publication number
US2223039A
US2223039A US236457A US23645738A US2223039A US 2223039 A US2223039 A US 2223039A US 236457 A US236457 A US 236457A US 23645738 A US23645738 A US 23645738A US 2223039 A US2223039 A US 2223039A
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US
United States
Prior art keywords
blank
rolls
mill
roll
rolling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US236457A
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English (en)
Inventor
Frank R Krause
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US126633A external-priority patent/US2161064A/en
Priority to FR833814D priority Critical patent/FR833814A/fr
Priority to GB5470/38A priority patent/GB499075A/en
Application filed by Individual filed Critical Individual
Priority to US236457A priority patent/US2223039A/en
Application granted granted Critical
Publication of US2223039A publication Critical patent/US2223039A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/42—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for step-by-step or planetary rolling

Definitions

  • WITNBSfS may BY 4:. ATTORNEYS.
  • This invention relates to a method for reducing and elongating metal blanks.
  • the amount of draft is also limited by the tendency of the metal to tear transversely at the center of the roll pass due to the friction force between the rolls and blank having a greater velocity in the direction of rolling at the pass center than at the first zone of contact of rolls and blank.
  • the blank is rolled in one a uniform draft which requires a great deal of power. When a single mill stand is used, for each successive reduction the entire blank must pass through the mill which is thus subjected to considerable strain and wear in reducing each blank to the gauge desired.
  • the draft is not limited to the coeflicient of friction for the blank and reducing means in which the character of the metal of the blank is improved, in which spreading of the blank is reduced to a minimum, and in which the life and capacity of the mill is increased.
  • a metal blank is reduced to any desired gauge or thickness by passing it once only through a mill having reducing means, such as a roll or rolls, which are caused to periodically move toward the front or entering end of the blank.
  • reducing means such as a roll or rolls, which are caused to periodically move toward the front or entering end of the blank.
  • the reducing means also first move toward the axis or central plane of the blank and then in paths parallel to that axis, whereby the unreduced portion of the blank is connected by 00 a tapered or wedg-shaped portion to a flat reduced portion.
  • the movement of reducing rolls is brought about by relative reciprocable movement between. the blank and a pair of track surfaces that back up and engage the rolls.
  • the 55 shape of these tracks determines the amount of reduction.
  • Fig. 1 is a plan view, partly in section, 25 of a rolling mill and blank-clamping and pushing apparatus
  • Fig. 2 is acentral vertical section thereof, except that the upper roll is shown in elevation
  • Fig. 3 is an enlarged view of the delivery end of the mill, half of it being shown in section
  • Fig. 4 is a plan view of apparatus for actuating the mill
  • Fig. 5 is a central vertical section thereof
  • Fig. 6 is a plan view-of apparatus for feeding blanks to the mill
  • Fig.-'l is a central vertical section thereof
  • Fig. 8 is an enlarged fragmentary view of Fig. 2;
  • Fig. 1 is a plan view, partly in section, 25 of a rolling mill and blank-clamping and pushing apparatus
  • Fig. 2 is acentral vertical section thereof, except that the upper roll is shown in elevation
  • Fig. 3 is an enlarged view of the delivery end of the mill, half of it being shown in section
  • Fig. 4 is a plan
  • a track housing I I provided with an opening 2 extendingfrom end to end thereof and having parallel horizontal and vertical side walls, is slidably mounted on a bedplate 3, Figs. 1, 2 and 3. Rigidly secured to the sidesof the track housing and projecting forbar 23 afllxed to thetop of the housing;
  • crank shaft journaled in the bed-plate.
  • the gears are rotated by pinionsi turned by a drive shaft ll likewise journaled in the bed-plate and driven of power.
  • a pair of tempered steel track plates I2 betweenwhich a roll carriage I3 is slidabiy disposed for movement longitudinally of the opening.
  • the carriage is guided in a straight line by a forward extensionften minating in an inverted channel ll slidably mounted on a rail I5 projecting from-the front of the track housing.
  • tical recesses in the side walls of the roll carriage is a pair of superimposedreducing rolls II which are biased apart by coil springs ll compressed between the bearing blocks, Fig. 3. h
  • the upper wall of opening 2 is formed by a cap I 9 slidable vertically in the upper portion of thehousing. 'I'his cap is biased upwardly by a coil'spring '20 compressed between the top c! a recess 2
  • Thewedges are spaced from the'cap by segmental shoes 21 which facilitate transverse rocking of the cap when only one wedge is adjusted.
  • the track plates are so formed that,"'as the track housing is""inoved forward by the cranks during each working stroke, the track plates carried by it roll the rolls forward against the stationary blank 32 toward its front end and simultaneously toward each other .whereby, by a combined rolling, sinking and drawing operation'fthey reduce and elongate the blank. -During .the latter part of the working stroke the rolls travel parallel to the parallel areas merging into areas 34' inclined.
  • roller oll parallel to each other until the diverging rear ends of the track plates reach them, whereupon they are permitted to spread apart and become released from the strip. While the track housing is conti'nuing'to move forward a short distance before its movement is reversed,
  • the roll carriage is pushed forward with it.
  • This is preferably done by a fluid pressure cylinder 36 mounted on the rearend of the bed-plate with its piston rod 31 connected to the carriage, as
  • each inclined area 34 of a track plate in the shape of a reverse curve with its front end nearly horizontal, (preferably 1 /2 to 2) andits central portion more steeply inclined to the-horizontal, as shown in Fig. 11..
  • the latter inclination can be considerably greater than-5.
  • the principal reason for this shape of track is to prevent the rolls from slip-'- ping-on the tracks or blank during the short working strokes that are. desirable from :the standpoint of rapid operation.
  • the likelihood of roll slippage on the blank isgreatest when they flrstmove into contact with the blank, and also when they approach the smaller end of the tapered portion of the blank where they come into contact with theparallel areas of the track. 'With 2,229,0 9 v 'ish'. and by the time the rear ends of the tracks tracks of theshape just referred to, the draft rolled cold thereinin which elongations of as.
  • each successive draft starts at zeroiat the surface of an unreduced increment and gradually increases to its maximum amount.
  • This gradual increase of the draftwith its accompanying reduction orientates the crystals in the metal before subjecting them to more severe elongations, and thereby improves the character of the metal.
  • This improved portion. of the metal is not affected .adversely during the, next working stroke of the'mill when it is subjectedto the maximum draft, but is still further improved" because this maximum ,draft-as effected inmy mill causes onlysgra'dually increasing elongationof the 'stock and very littl spreading thereof.
  • the blank is .fed or advanced. a step to subject the next succeeding unrolled or unreduced increment thereof to the action of the rolls.
  • Adesirable feeding apparatus for this. purpose I is illustrated in the drawings wherein a slide 142 .is slidable toward and away fromthe mill in a a longitudinally extending recess 43 in .a table 44.
  • a pipe 62 extends from the front 1 end of the Qcylinder down through a.housing 53 to a drain ivo .orsump.
  • the pipe is provided within the housing with a -shut-oil valve 54 which is. actuated by a lever biased forwardly to closed'position against a pin stop 51 by a coil spring".
  • Slidably mounted in the housing above'this valve is a rod 59' the front end of which is connected to the bottom of the track housing, as shown in Fig. 2.
  • Within the valve housing a depending dog 6
  • valve 54 This closing of the valve stops the piston and blankfeed.
  • the dog When the dog is moved forwardly by the advancing track housing it passes over the 1 end of the lever and then is pulled forward against stop'ilby spring 63.
  • the volume of fluid. that is permitted to escape from the front .of the. cylinder each time valve 54 is opened determines the amount of feedof piston and blank.
  • Thecl'amp includes a support'lii'provided at one side with a bracket 61 in which is pivotally mounted one end ofan' arm 68 that extends across the top of.
  • Fluid pressure is automatically supplied to the any well-known automatic control which may be actuated by the reciprocating track housing if desired.
  • vancing the blank a step repeating the entire rolling operation starting with an unrolled increment of the blank, holding the unrolled portion of the blank in substantially fixed position during each blank-reducing step, said increment being tapered and said previously tapered portion being further reduced with its thinner end reduced to flat form during said second rolling operation, and repeating the entire cycle .of operation until substantially the entire blank is rolled down to fiat reduced form.
  • step-by-step method of reducing a metal blank in successive increments comprising effecting relative reciprocable movement between said blank and blank-reducing means longitudinally of the blank to cause said means to periodically move toward the front end of the blank, moving said means first 'toward and then substantially parallel to the axis of the blank as it approaches the front of the blank to reduce and elongate a portion thereof, and leaving said means free to accommodate itself to the elongaapproaches the front of the blank to reduce and I elongate a portion thereof, leaving said means free to accommodate itself to the elongation of the blank, and holding the unrolled portion of 10 comprising simultaneously rolling a pairoi rolls toward the front end of said blank and toward each other in planes intersecting the axis of the blank at an angle of approximately 2,continuing the rolling withthe rolls approaching each other in planes intersecting said axis at'an angle substantially greater than 5 followed by a more gradual approach, advancing the blank astep,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
US236457A 1937-02-19 1938-10-22 Method for elongating metal blanks Expired - Lifetime US2223039A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR833814D FR833814A (fr) 1937-02-19 1938-02-18 Procédé et appareil pour réduire les dimensions de lingots métalliques et les allonger
GB5470/38A GB499075A (en) 1937-02-19 1938-02-21 Method of and apparatus for reducing and elongating metal blanks
US236457A US2223039A (en) 1937-02-19 1938-10-22 Method for elongating metal blanks

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US126633A US2161064A (en) 1937-02-19 1937-02-19 Method and apparatus for elongating metal blanks
US236457A US2223039A (en) 1937-02-19 1938-10-22 Method for elongating metal blanks

Publications (1)

Publication Number Publication Date
US2223039A true US2223039A (en) 1940-11-26

Family

ID=26824890

Family Applications (1)

Application Number Title Priority Date Filing Date
US236457A Expired - Lifetime US2223039A (en) 1937-02-19 1938-10-22 Method for elongating metal blanks

Country Status (3)

Country Link
US (1) US2223039A (fr)
FR (1) FR833814A (fr)
GB (1) GB499075A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE934461C (de) * 1951-08-13 1955-10-27 Fritz Singer Dr Streckpresse zum Reduzieren der Wandstaerke von Werkstuecken rechteckigen Querschnitts
DE965693C (de) * 1953-05-13 1957-06-13 Tube Reducing Corp Streckpresse zur Herstellung von in der Laengsrichtung querschnittsprofilierten Werkstuecken
US2878697A (en) * 1953-06-03 1959-03-24 Thompson Prod Inc Machine for rolling metal
US2969700A (en) * 1954-03-23 1961-01-31 Thompson Ramo Wooldridge Inc Machine for rolling metal
US3496749A (en) * 1967-11-28 1970-02-24 Richard Krause Rolling mill for shaping bars
US3635065A (en) * 1969-09-18 1972-01-18 Tadeusz Sendzimir Backing-plate-driven cyclic rolling mill
DE2418526A1 (de) * 1973-05-10 1974-11-28 Josef Froehling Zycloidwalzwerk

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB871997A (en) * 1958-01-03 1961-07-05 Ici Ltd Method of and apparatus for reducing the thickness of metals
FR2514672A1 (fr) * 1981-10-15 1983-04-22 Gp Konstruk Laminoir a effet periodique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE934461C (de) * 1951-08-13 1955-10-27 Fritz Singer Dr Streckpresse zum Reduzieren der Wandstaerke von Werkstuecken rechteckigen Querschnitts
DE965693C (de) * 1953-05-13 1957-06-13 Tube Reducing Corp Streckpresse zur Herstellung von in der Laengsrichtung querschnittsprofilierten Werkstuecken
US2878697A (en) * 1953-06-03 1959-03-24 Thompson Prod Inc Machine for rolling metal
US2969700A (en) * 1954-03-23 1961-01-31 Thompson Ramo Wooldridge Inc Machine for rolling metal
US3496749A (en) * 1967-11-28 1970-02-24 Richard Krause Rolling mill for shaping bars
US3635065A (en) * 1969-09-18 1972-01-18 Tadeusz Sendzimir Backing-plate-driven cyclic rolling mill
DE2418526A1 (de) * 1973-05-10 1974-11-28 Josef Froehling Zycloidwalzwerk

Also Published As

Publication number Publication date
GB499075A (en) 1939-01-18
FR833814A (fr) 1938-11-02

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