US2108379A - Hot strip rolling - Google Patents
Hot strip rolling Download PDFInfo
- Publication number
- US2108379A US2108379A US80594A US8059436A US2108379A US 2108379 A US2108379 A US 2108379A US 80594 A US80594 A US 80594A US 8059436 A US8059436 A US 8059436A US 2108379 A US2108379 A US 2108379A
- Authority
- US
- United States
- Prior art keywords
- strip
- billet
- rolling
- pass
- corners
- 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
Links
- 238000005096 rolling process Methods 0.000 title description 21
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000010432 diamond Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
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
- B21B1/02—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 heavy work, e.g. ingots, slabs, blooms, or billets, in which the cross-sectional form is unimportant ; Rolling combined with forging or pressing
- B21B1/026—Rolling
Definitions
- 4'I'hisinvention relates to the rolling of metal, and is particularly concerned with the hot rolling of steel, one of the objects being to roll sections or shapes, particularly rectangular shapes, of greater width than thickness in such a manner that a greater portion of the surface of the metal is worked than.-was heretofore possible.
- a more specific object is to hot-roll steel strip so that its entire surface receives at least some working.
- strip-as here used is intended to cover products such as sheet bar, skelp, etc.
- Other objects may be inferred from the fol lowing disclosure.
- a steel bloom is heated to a proper rolling temperature and worked into a square billet by any conventional method that will produce oppositely rolled corners. Ordinarily, this necessitates diagonal rolling, the oval square, diamond square and diamond methods being examples. Then, on the same heat, this billet is rolled on its opposite diagonal to atten it into strip by spreading so that its previously rolled corners become the edges of this strip. To do this, the corners of the billet between its previously'rolled corners are rolled in such a manner as to permit lateral spreading of its previously rolled corners.
- Figure 1 shows the last pass in the reduction of the bloom to the billet.
- Figure 2 shows the pass beginning the reduction of this billet to the desired strip.
- Figures 3 through 6 show the successive passes required to produce the strip.
- Figure 1 represents the final pass 4usedl in reducing the bloom to the billet.
- the corners rolled onto the billet by this pass are numeraled I, and the corners that cannot beso rolled are 45 numeraled 2. This figure is included only to emphasize the fact that the rolling .of the billet must be done in such a manner as toprovide' opposite rolled corners.
- Pass #2 vshown by Figure 3 differs somewhat in that it isa closed one to provide some edge control and its diagonal square or diamond is of reduced area. -Otherwise, surfaces Ila and 4a are for the same purposes -as the surfaces' 3 and 4 in the case of the pass #1.
- Pass #3 shown by Figure 4 is a closed flat pass which completely attens the billet and provides for the edge control required to assure strip of the proper Width.
- This pass and passes #4 and #5 illustrated by Figures 5 and 6 may be considered as conventional iiat passes, and in them the strip is further formed and finished.
- plastic state as used above is not intended to mean that the steel is not suiilciently malleable to be rolled in passes #4, #5 and #6, but means that the steel falls to a temperature in or below its critical range about the time it reaches pass #4.
- a hot strip rolling method including producing a billet with rolled opposite corners and rolling down parts of said billet between said corners while permitting the latter to spread and become edges of the strip.
- a hot strip rolling method including producing a rectangular billet by diagonal rolling and rolling said billet on its opposite diagonal to iiatten it into strip and to spread its previously rolled corners so they become the edges of said strip.
- a hot strip rolling method including producing a rectangular billet by diagonal rolling, rolling against a majority of the surface of said billet on its opposite diagonal while permitting its corners to spread laterally, attening into strip by rolling on its same diagonal and forming said corners into the edges of said strip.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
Description
Feb. l5, 1938. R. l.. LEFFLER 2,108,379
HOT STRIP ROLLING w Filed May v19, 1936 2 sheets-sheet 1 ,415T P455 /A/ v HOLL/N6 B/LLET @lign/Z021' 'E055 L .y LEFFLE/e,
Feb. 15, 19385. R51.; lLEM-'LER A HOT STRIP ROLLING I FiledMay 19, 195e z sheetssheet 2 @dan 'E55 L LEF/FL 5E,
Patented Feb. 15, 1938 UNITED STATES PATENT OFFICE HOT STRIP ROLLING Ross Leiler, McKeesport, Pa. ApplicationMay 19, 1936, Serial No. 80,594
3 Claims.
4'I'hisinvention relates to the rolling of metal, and is particularly concerned with the hot rolling of steel, one of the objects being to roll sections or shapes, particularly rectangular shapes, of greater width than thickness in such a manner that a greater portion of the surface of the metal is worked than.-was heretofore possible. A more specific object is to hot-roll steel strip so that its entire surface receives at least some working. The term strip-as here used is intended to cover products such as sheet bar, skelp, etc. Other objects may be inferred from the fol lowing disclosure.
As an example of the invention, a steel bloom is heated to a proper rolling temperature and worked into a square billet by any conventional method that will produce oppositely rolled corners. Ordinarily, this necessitates diagonal rolling, the oval square, diamond square and diamond methods being examples. Then, on the same heat, this billet is rolled on its opposite diagonal to atten it into strip by spreading so that its previously rolled corners become the edges of this strip. To do this, the corners of the billet between its previously'rolled corners are rolled in such a manner as to permit lateral spreading of its previously rolled corners.
The described procedureresults in the entire surface of the strip being worked. It is to be understood that the volume of the vmetal is proportioned along with the various reductions t0 provide a strip of the width and thickness desired.
Referring to the accompanying drawings: Figure 1 shows the last pass in the reduction of the bloom to the billet.
Figure 2 shows the pass beginning the reduction of this billet to the desired strip.
Figures 3 through 6 show the successive passes required to produce the strip.
Figure 1 represents the final pass 4usedl in reducing the bloom to the billet. The corners rolled onto the billet by this pass are numeraled I, and the corners that cannot beso rolled are 45 numeraled 2. This figure is included only to emphasize the fact that the rolling .of the billet must be done in such a manner as toprovide' opposite rolled corners.
This billet is now entered on its opposite diagonal into pass #1 -shown by Figure 2, the billet being here illustrated by the broken lines and vthe outline of the pass by the solid lines. It will be` noted that the diagonal between the corners Iis now horizontal, While that between the corners- 2 is `vertical. The pass itself is formed by rolls having grooves providing 'diagonal square or diamond surfaces 3 which work a majority of the surface'of the billet and iiat surfaces 4 that are oppositely spaced to provide recesses into which the previously rolled corners I may 5 spread. This'flrst pass is open since edge control is not necessary at this time.
Pass #2 vshown by Figure 3 differs somewhat in that it isa closed one to provide some edge control and its diagonal square or diamond is of reduced area. -Otherwise, surfaces Ila and 4a are for the same purposes -as the surfaces' 3 and 4 in the case of the pass # 1.
Pass #3 shown by Figure 4 is a closed flat pass which completely attens the billet and provides for the edge control required to assure strip of the proper Width. This pass and passes #4 and #5 illustrated by Figures 5 and 6 may be considered as conventional iiat passes, and in them the strip is further formed and finished.
The showing of the work by broken lines and the pass by solid lines, as explained in connection with pass # 1, is maintained throughout these other figures. It is to be observed that the corners I of the billet eventually become the edges of the strip, the corners 2 disappearing at pass #3 to become the flattened section of thestrip. The work does not require turning. In passes #l and #2 the surfaces- 3 and 3a provide thickened central sections of metal which eventually flows laterally and longitudinally into width and length, this eliminating the lateral stretching- -usually required to provide the strip with its proper Width. -The manner in which the width and thickness of the strip can be controlled or varied is obvious.
An important advantage connected with what has been disclosed consists in the fact that the edges of the strip are actually the corners I rolled into the billet by the last pass used in its formation and which is illustrated by Figure 1. It is obvious that these edges ewill be superior to those produced by the methods hel Jofore in vogue.
.Another great advantage is that it is possible to construct passes # 1 and #2 so that a great majority of the surface of the steel is worked while it is still in a plastic state. Although not previously mentioned, it is to be understood that in the interests of economy the rolling must be done on a single 'heat from the bloom through the billet and down to the final strip, and that due to rapid cooling the steel may not be in a plastic state after it reaches pass #4. In the -usual lmethods of rolling strip the work is kept three passes only a relatively small proportion of its surface is actually worked. By rolling the ingot on its diagonal in the manner described it is possible to use a pass like that shown by Figure 2 wherein diagonal square or diamond grooves of relatively great depth are provided tov work a great majority of the metals surface, the only portions unworked being those which spread into the recesses .4 and which have already been worked by the previous rolling ci the square billet on its opposite diagonal. The same advantages are involved by pass #2, while pass #3 works the metal sufficiently thin to accomplish the same thing to a considerable extent.
The term plastic state as used above is not intended to mean that the steel is not suiilciently malleable to be rolled in passes #4, #5 and #6, but means that the steel falls to a temperature in or below its critical range about the time it reaches pass #4.
dieser@ l claim: Y
l. A hot strip rolling method including producing a billet with rolled opposite corners and rolling down parts of said billet between said corners while permitting the latter to spread and become edges of the strip.
2. A hot strip rolling method including producing a rectangular billet by diagonal rolling and rolling said billet on its opposite diagonal to iiatten it into strip and to spread its previously rolled corners so they become the edges of said strip.
3. A hot strip rolling method including producing a rectangular billet by diagonal rolling, rolling against a majority of the surface of said billet on its opposite diagonal while permitting its corners to spread laterally, attening into strip by rolling on its same diagonal and forming said corners into the edges of said strip.
Ross i..
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80594A US2108379A (en) | 1936-05-19 | 1936-05-19 | Hot strip rolling |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US80594A US2108379A (en) | 1936-05-19 | 1936-05-19 | Hot strip rolling |
Publications (1)
Publication Number | Publication Date |
---|---|
US2108379A true US2108379A (en) | 1938-02-15 |
Family
ID=22158362
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US80594A Expired - Lifetime US2108379A (en) | 1936-05-19 | 1936-05-19 | Hot strip rolling |
Country Status (1)
Country | Link |
---|---|
US (1) | US2108379A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741884C (en) * | 1940-05-25 | 1953-05-11 | Trierer Walzwerk A G Wuppertal | Rolling mill for cold rolling completely flat metal strips and strips |
-
1936
- 1936-05-19 US US80594A patent/US2108379A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741884C (en) * | 1940-05-25 | 1953-05-11 | Trierer Walzwerk A G Wuppertal | Rolling mill for cold rolling completely flat metal strips and strips |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3358358A (en) | Method of reducing width of metal slabs | |
DE1110119B (en) | Method for producing hollow sheet metal bodies | |
US2128943A (en) | Formation of encased structures by direct casting | |
DE102017107746A1 (en) | Continuous casting technology with variable thickness for tailor-made rolling | |
US2108379A (en) | Hot strip rolling | |
DE608828C (en) | Process for the production of lightweight profiles | |
US2095580A (en) | Steel strip and its production | |
US2960764A (en) | Method of making metal shapes having thin webs | |
US1464929A (en) | Method of rolling plate and like metal and blank therefor | |
DE19843200C1 (en) | Method for producing hot rolled strip and sheet | |
US3066384A (en) | Method of making wide flat sheets | |
US2075066A (en) | Method of rolling metal | |
US3667270A (en) | Method for smoothing rolls for cold rolling or finishing cold rolling of bright metal sheet or the like | |
US2195613A (en) | Means for producing composite metal products | |
US1829339A (en) | Process of rolling metal | |
US1833035A (en) | Member for use in the production of convex metal sheets and method for processing the same | |
US1842220A (en) | Sheet metal rolling process | |
US1906648A (en) | Method of making hinges | |
US4393679A (en) | Method for producing blank for wide flange beam | |
US1858920A (en) | Method of making seamless tubes | |
RU2776314C1 (en) | Rail rolling method (variants) | |
US3157474A (en) | Preparation of expandable laminate stock and billet therefor | |
DE813987C (en) | Process for rolling thick and medium-sized plates of even thickness | |
US2171074A (en) | Process for improving the texture of rolled products | |
US3116121A (en) | Ingot and the mold and core structure for casting the same |