US3241349A - Method for widening and removing crown from strip stock - Google Patents

Method for widening and removing crown from strip stock Download PDF

Info

Publication number
US3241349A
US3241349A US313645A US31364563A US3241349A US 3241349 A US3241349 A US 3241349A US 313645 A US313645 A US 313645A US 31364563 A US31364563 A US 31364563A US 3241349 A US3241349 A US 3241349A
Authority
US
United States
Prior art keywords
strip
groove
rolling
causing
widening
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
US313645A
Inventor
Claus L Sporck
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.)
Lodge and Shipley Co
Original Assignee
Lodge and Shipley Co
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
Application filed by Lodge and Shipley Co filed Critical Lodge and Shipley Co
Priority to US313645A priority Critical patent/US3241349A/en
Priority to FR990190A priority patent/FR1411391A/en
Priority to BE653939A priority patent/BE653939A/xx
Priority to GB40176/64A priority patent/GB1087199A/en
Priority to CH1279264A priority patent/CH457339A/en
Application granted granted Critical
Publication of US3241349A publication Critical patent/US3241349A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • B21B1/22—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 rolling plates, strips, bands or sheets of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning

Definitions

  • Patent No. 3,138,982 issued June 30, 1964.
  • One of the principal objects of the invention is to provide methods for converting conventionally rolled strip stock into strip which is of precise thickness and/or of substantial width.
  • the precise thickness eliminates crown.
  • the methods of the invention utilize the incremental reduction concept disclosed in the above-mentioned applications.
  • the manner in which the present invention is performed results in several important advantages, such as, for example, minimizing the size of the reducing mill so as to lower equipment cost and save in floor space, permitting the off-coil equipment for the conventional strip and the on-coil equipment for the worked strip to be located closely adjacent to the reducing mill and thereby saving considerable floor space and providing for the rolling to be carried out at a relative high strip feed rate.
  • the invention contemplates wrapping a piece of conventionally rolled strip in a helical fashion around a cylindrically-shaped mandrel.
  • the mandrel is rotatable and when the strip is moved in translation, successive portions of the strip move into the wrap-around condition.
  • a plurality of rollers surround the mandrel in the wrap-around area, the rollers being mounted on framing providing for the rollers to rotate in unison around the mandrel.
  • Each roller engages and works the strip along a diagonal path from edge to edge.
  • the rollers are made to successively roll across the face of the strip and successively engage and reduce adjacent areas on the strip. The rolling process widens the strip and provides the same with precise thickness dimension.
  • FIGURE 1 is a perspective view of a typical mill for reducing the strip
  • FIGURE 2 is a plan sectional view of the roller arrangement used with the mill of FIGURE 1;
  • FIGURE 3 is a perspective view of a strip wrapped around a conically shaped mandrel.
  • the mill has a base 1, a central standard 2 and out-board standards 3 and 4.
  • a cylindrically-shaped mandrel 5 extends through the open centered standard 2 and is supported by the outboard standards 3 and 4 for rotation about the axis A.
  • the mandrel is adapted to be rotated through gearing (not shown) in the standard 4 and connected to the drive shaft 6.
  • the shaft 6 is connected to a drive mechanism not shown.
  • the rollers R disposed in the frame 9 (FIGURE 2) rotatably mounted by bearings 10.
  • the bearing structure 11 rotatably supports each roller within the frame 9.
  • the frame is rotated by a bull gear 13 driven by a pinion 14 connected ice to the shaft 15 which is rotated by a drive mechanism not shown.
  • a strip S is wrapped around the man-drel 5.
  • the strip enters the mill at 16 and leaves the mill at 17.
  • the strip is adapted to be moved in translation and as the strip moves through the mill, successive portions of the strip assume the wrap-around condition.
  • the portions of the strip entering and leaving the mill lie in the same plane so that the strip in its wrap-around condition makes a 360 contact with the mandrel.
  • the exact amount of contact can vary depending on the angle (a) at which the strip enters and leaves the mill and the disposition of the rollers R.
  • the mechanism for moving the strip in translation includes tension means to keep the strip taut together with off-coil and on-coil means.
  • tension means to keep the strip taut together with off-coil and on-coil means.
  • Such mechanism is of conventional design.
  • the strip drive has the tendency to cause the strip to creep axially along the spindle. This is prevented by appropriate strip abutment shoulders on the mandrel and/or ingoing and outgoing guide rollers. For the sake of clarity, I have not shown such devices.
  • each roller orbits around the wrap-around area and in contacting the strip, moves across the face of the strip from one edge to the opposite edge in a diagonal fashion.
  • each successive roller is made to engage the strip and move across in the same diagonal manner. All of the roller paths are parallel.
  • As a roller moves across a strip of course, it reduces the portion rolled to the desired dimension. The reduction causes expansion of the strip. The expansion takes place in the plane of the strip and in a direction which is normal to the path of roller motion.
  • the first roller to engage the strip rolls down a groove and then each successive roller widens the groove.
  • the invention contemplates a mandrel conical in shape. This is illustrated in FIGURE 3 where it will be seen that a conical shaped mandrel 20 supports a strip S-1 in wraparound condition.
  • a conical shaped mandrel 20 supports a strip S-1 in wraparound condition.
  • One of the principal advantages of the conical shaped mandrel is that it prevents axial creep of the strip.
  • the conical mandrel by mounting the conical mandrel so that it is axially adjustable, the space between the working surfaces of the roller and the mandrel surface can be quickly and easily altered.

Description

March 22, 1966 c. L. sPoRcK 3,241,349
METHOD FOR WIDENING AND REMOVING CROWN FROM STRIP STOCK Filed Oct. 5, 1963 2 Sheets-Sheet 1 ww 'l i z ATTORNEYS March 22, 1966 c. L. SPORCK 3,241,349
METHOD FOR WIDENING AND REMOVING CROWN FROM STRIP STOCK Filed Oct. 5, 1963 2 Sheets-Sheet 2 BY yEN OR MFO ATTQRNEYS United States Patent 3 241 349 METHOD non wniENiNG AND REMOVING CROWN FnoM STRIP STOCK Claus L. Spot-ck, Cincinnati, Ohio, assignor to The Lodge & Shipley Company, Cincinnati, Ohio, a corporation of Ohio Filed Oct. 3, 1963, Ser. No. 313,645 2 Claims. (Cl. 72-366) copending application 206,411, filed June 29, 1962, now
Patent No. 3,138,982, issued June 30, 1964.
One of the principal objects of the invention is to provide methods for converting conventionally rolled strip stock into strip which is of precise thickness and/or of substantial width. The precise thickness eliminates crown.
The methods of the invention utilize the incremental reduction concept disclosed in the above-mentioned applications. The manner in which the present invention is performed, however, results in several important advantages, such as, for example, minimizing the size of the reducing mill so as to lower equipment cost and save in floor space, permitting the off-coil equipment for the conventional strip and the on-coil equipment for the worked strip to be located closely adjacent to the reducing mill and thereby saving considerable floor space and providing for the rolling to be carried out at a relative high strip feed rate.
The invention contemplates wrapping a piece of conventionally rolled strip in a helical fashion around a cylindrically-shaped mandrel. The mandrel is rotatable and when the strip is moved in translation, successive portions of the strip move into the wrap-around condition. A plurality of rollers surround the mandrel in the wrap-around area, the rollers being mounted on framing providing for the rollers to rotate in unison around the mandrel. Each roller engages and works the strip along a diagonal path from edge to edge. By coordinating the rotational speed of the rollers and the translatory motion of the strip, the rollers are made to successively roll across the face of the strip and successively engage and reduce adjacent areas on the strip. The rolling process widens the strip and provides the same with precise thickness dimension.
The manner in which the invention is practiced will be described below in connection with the following drawin-gs wherein:
FIGURE 1 is a perspective view of a typical mill for reducing the strip;
FIGURE 2 is a plan sectional view of the roller arrangement used with the mill of FIGURE 1; and
FIGURE 3 is a perspective view of a strip wrapped around a conically shaped mandrel.
With reference to FIGURE 1, the mill has a base 1, a central standard 2 and out-board standards 3 and 4. A cylindrically-shaped mandrel 5 extends through the open centered standard 2 and is supported by the outboard standards 3 and 4 for rotation about the axis A. The mandrel is adapted to be rotated through gearing (not shown) in the standard 4 and connected to the drive shaft 6. The shaft 6 is connected to a drive mechanism not shown. Within the central standard 2 are the rollers R disposed in the frame 9 (FIGURE 2) rotatably mounted by bearings 10. The bearing structure 11 rotatably supports each roller within the frame 9. The frame is rotated by a bull gear 13 driven by a pinion 14 connected ice to the shaft 15 which is rotated by a drive mechanism not shown.
A strip S is wrapped around the man-drel 5. The strip enters the mill at 16 and leaves the mill at 17. The strip is adapted to be moved in translation and as the strip moves through the mill, successive portions of the strip assume the wrap-around condition.
The portions of the strip entering and leaving the mill lie in the same plane so that the strip in its wrap-around condition makes a 360 contact with the mandrel. The exact amount of contact, however, can vary depending on the angle (a) at which the strip enters and leaves the mill and the disposition of the rollers R.
The mechanism for moving the strip in translation includes tension means to keep the strip taut together with off-coil and on-coil means. Such mechanism is of conventional design.
In certain instances the strip drive has the tendency to cause the strip to creep axially along the spindle. This is prevented by appropriate strip abutment shoulders on the mandrel and/or ingoing and outgoing guide rollers. For the sake of clarity, I have not shown such devices.
From an inspection of FIGURES 1 and 2, it will be apparent that each roller orbits around the wrap-around area and in contacting the strip, moves across the face of the strip from one edge to the opposite edge in a diagonal fashion. By coordinating the feed rate of the strip and the rotational speed of the rollers, each successive roller is made to engage the strip and move across in the same diagonal manner. All of the roller paths are parallel. As a roller moves across a strip, of course, it reduces the portion rolled to the desired dimension. The reduction causes expansion of the strip. The expansion takes place in the plane of the strip and in a direction which is normal to the path of roller motion. The first roller to engage the strip rolls down a groove and then each successive roller widens the groove. From the foregoing description, it will be apparent that the technique employs the incremental reduction concept as disclosed in the above-mentioned copending applications.
In lieu of the cylindrically shaped mandrel, the invention contemplates a mandrel conical in shape. This is illustrated in FIGURE 3 where it will be seen that a conical shaped mandrel 20 supports a strip S-1 in wraparound condition. One of the principal advantages of the conical shaped mandrel is that it prevents axial creep of the strip. Furthermore, by mounting the conical mandrel so that it is axially adjustable, the space between the working surfaces of the roller and the mandrel surface can be quickly and easily altered.
I claim:
1. The method of widening metal strip stock and providing precise thickness dimension therein, comprising the steps of:
taking a piece of strip stock;
wrapping the strip over a cylindrically-shaped mandrel;
moving the strip in translation so that portions of the strip successively assume the wrap condition;
while moving the strip, working the same by rolling a groove across the face of the section of the strip in the wrap condition, the rolling of the groove causing the portion rolled to be reduced to the desired thickness dimension and also causing the strip to expand in the plane of the strip and in a direction normal to the groove;
continuing with said working by rolling the strip adjacent first said groove to effect an increase in width of first said groove, the increase in width being substantially less than the width of the: strip, the rolling causing the portion rolled to be reduced to the de- 3 sired thickness dimension and also causing the strip to expand in the plane of the strip and in a direction normal to the groove; and continuing With said working by repeating said second step successively on respectively adjacent areas of the strip to continue said groove widening and strip expansion. 2. The method of Widening metal strip stock and procontinuing with said working by rolling the strip adjacent first said groove to effect an increase in Width of first said groove, the increase in width being substantially less than the Width of the strip, the rolling causing the portion rolled to be reduced to the desired thickness dimension and also causing the strip to expand in the plane of the strip and in a direction normal to the groove; and
continuing with said Working by repeating said second step successively on respectively adjacent areas of the strip to continue said groove Widening and strip expansion.
viding precise thickness dimension therein, comprising the steps of: 10
taking a piece of strip stock; wrapping the strip over a tapered mandrel; moving the strip in translation so that portions of the strip successively assume the wrap condition; References Cited by the Examiner while moving the strip, working the same by rolling a 15 UNITED STATES PATENTS groove across the face of the section of the strip in of 24122; 23-23 1 d i the POFUOII r0 1 o e reduced to the desired thick 2,367,226 1/1945 Lonsdale S0 60 ness dimension and also causing the strip to expand in the plane of the strip and in a direction normal to 20 CHARLES W LANHAM Primar Examiner the groove; y

Claims (1)

1. THE METHOD OF WIDENING METAL STRIP STOCK AND PROVIDING PRECISE THICKNESS DIMENSION THEREIN, COMPRISING THE STEPS OF: TAKING A PIECE OF STRIP STOCK; WRAPPING THE STRIP OVER A CYLINDRICALLY-SHAPED MANDREL; MOVING THE STRIP IN TRANSLATION SO THAT PORTIONS OF THE STRIP SUCCESSIVELY ASSUME THE WRAP CONDITION; WHILE MOVING THE STRIP, WORKING THE SAME BY ROLLING A GROOVE ACROSS THE FACE OF THE SECTION OF THE STRIP IN THE WRAP CONDITION, THE ROLLING OF THE GROOVE CAUSING THE PORTION ROLLED TO BE REDUCED TO THE DESIRED THICKNESS DIMENSION AND ALSO CAUSING THE STRIP TO EXPAND IN THE PLANE OF THE STRIP AND IN A DIRECTION NORMAL TO THE GROOVE; CONTINUING WITH SAID WORKING BY ROLLING THE STRIP ADJACENT FIRST SAID GROOVE TO EFFECT AN INCREASE IN WIDTH OF FIRST SAID GROOVE, THE INCREASE IN WIDTH BEING SUBSTANTIALLY LESS THAN THE WIDTH OF THE STRIP, THE ROLLING CAUSING THE PORTION ROLLED TO BE REDUCED TO THE DESIRED THICKNESS DIMENSION AND ALSO CAUSING THE STRIP TO EXPAND IN THE PLANE OF THE STRIP AND IN A DIRECTION NORMAL TO THE GROOVE; AND CONTINUING WITH SAID WORKING BY THE REPEATING SAID SECOND STEP SUCCESSIVELY ON RESPECTIVELY ADJACENT AREAS OF THE STRIP TO CONTINUE SAID GROOVE WIDENING AND STRIP EXPANSION.
US313645A 1963-10-03 1963-10-03 Method for widening and removing crown from strip stock Expired - Lifetime US3241349A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US313645A US3241349A (en) 1963-10-03 1963-10-03 Method for widening and removing crown from strip stock
FR990190A FR1411391A (en) 1963-10-03 1964-10-02 Shaping process in particular for widening metal bands and installation for carrying out the process
BE653939A BE653939A (en) 1963-10-03 1964-10-02
GB40176/64A GB1087199A (en) 1963-10-03 1964-10-02 Improvements in or relating to metal working
CH1279264A CH457339A (en) 1963-10-03 1964-10-02 Process for bulging, flattening or widening a sheet metal strip

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US313645A US3241349A (en) 1963-10-03 1963-10-03 Method for widening and removing crown from strip stock

Publications (1)

Publication Number Publication Date
US3241349A true US3241349A (en) 1966-03-22

Family

ID=23216529

Family Applications (1)

Application Number Title Priority Date Filing Date
US313645A Expired - Lifetime US3241349A (en) 1963-10-03 1963-10-03 Method for widening and removing crown from strip stock

Country Status (4)

Country Link
US (1) US3241349A (en)
BE (1) BE653939A (en)
CH (1) CH457339A (en)
GB (1) GB1087199A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2540755A1 (en) * 1983-02-15 1984-08-17 Pechiney Aluminium PROCESS FOR EXTENDING, BY ROLLING, A METALLURGICAL MEPLATE PRODUCT

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1814594A (en) * 1926-06-21 1931-07-14 Harvey M Gersman Apparatus for widening rolled metal products
US2287091A (en) * 1940-04-11 1942-06-23 Charles B Cushwa Method and apparatus for making dished heads
US2367226A (en) * 1940-05-10 1945-01-16 Foster Wheeler Corp Apparatus for producing extended surface tubular members

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1814594A (en) * 1926-06-21 1931-07-14 Harvey M Gersman Apparatus for widening rolled metal products
US2287091A (en) * 1940-04-11 1942-06-23 Charles B Cushwa Method and apparatus for making dished heads
US2367226A (en) * 1940-05-10 1945-01-16 Foster Wheeler Corp Apparatus for producing extended surface tubular members

Also Published As

Publication number Publication date
GB1087199A (en) 1967-10-11
CH457339A (en) 1968-06-15
BE653939A (en) 1965-04-02

Similar Documents

Publication Publication Date Title
KR840002037B1 (en) Cooperative rolling apparatus
US3566653A (en) Tube reducing and elongating apparatus
US3394574A (en) Treatment of strip metal
US3487675A (en) Tube forming
US3439519A (en) Billet roughing mill
US3132545A (en) Cycloidal rolling mill
US3241349A (en) Method for widening and removing crown from strip stock
US2089311A (en) Tandem mill
JPH0760301A (en) Method for guideless rolling
US5878614A (en) Finn pass forming device for forming seam welded steel pipes and roller device available for forming seam welded steel pipes of a plurality of sizes
US4444035A (en) Steel pipe rolling mill
SE8303563D0 (en) METHOD AND ROLLING METHOD FOR SELECTING METAL BANDS
US3845649A (en) Tube production
US2206759A (en) Cross rolling
US20040035165A1 (en) Method and apparatus for manufacturing tubes by rolling
DE2528850B2 (en) Pilgrim step mill for pipe cold rolling
SU761040A1 (en) Screw rolling mill
US3466913A (en) Strip working apparatus
JPS6236761B2 (en)
SU733748A1 (en) Roll stand for helical rolling mill
SU1219187A1 (en) Arrangement for continuous reducing of metal in rolls
US2651225A (en) Device for adjusting and operating guides in the procedure of rolling metals
US3090265A (en) Apparatus for rolling disks
SU727296A1 (en) Roll stand of mill for cross-rolling of hollow shaped articles
SU130469A1 (en) The method of reverse rolling ingots in one plane