US1622286A - Method and apparatus for heating rolls - Google Patents
Method and apparatus for heating rolls Download PDFInfo
- Publication number
- US1622286A US1622286A US1622286DA US1622286A US 1622286 A US1622286 A US 1622286A US 1622286D A US1622286D A US 1622286DA US 1622286 A US1622286 A US 1622286A
- Authority
- US
- United States
- Prior art keywords
- rolls
- heating
- roll
- heat
- elements
- 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
- 238000010438 heat treatment Methods 0.000 title description 44
- 239000011810 insulating material Substances 0.000 description 4
- 241001527902 Aratus Species 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 230000035882 stress Effects 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/06—Lubricating, cooling or heating rolls
- B21B27/10—Lubricating, cooling or heating rolls externally
- B21B27/106—Heating the rolls
Definitions
- t is a further object to provide apparatus of this character which is relatively light and which may be moved about and applied to the rolls without moving them from the roll stands.
- I? is also an object of the present invention toprovide heating means in which the heat may be transmitted to the rolls by direct metallic contact.
- Efiorts have heretofore been made to heat rolls by the application of steam jackets or by blowing heated air or gases upon the rolls. These methods do not allow for an adequate temperature range or" control of the temperature, or of application of differing amounts of heat to the various portions of the roll. Moreover, they do not allow.
- the heating means be flexible if it is ,to maintain contact with the rolls throughout the heating ope-ration.
- Figure 2 1s a view on an enlarged scale.
- Figure 3 is a fragmentary view showing the heater applied to the rolls as seen from the right of Figure 1;
- Figure 4 is a detail view, partly broken away showing one of, the heating elements;
- F1 re 5 is a fragmentary view illustrating t e contact of the heating element with a the roll;
- amr Figures 6, 7 and 8 are somewhat diagrammatic v1ews illustrating circuits suitable for our heating means.
- the roll heater comprises two separate elements A and B, one of which is applied to each side of thepair of rolls. These elements are exactly similar and the description. of one ap lies to the other.
- the elements comprise a rame 14 of angle bars from which the handles 15 extend-at the upper end and the rollers 16 extend at the lower end.
- the two elements A and B are clamped together by means of the bolts 17 and 18 at their upper and lower ends.
- the flexible jacket members 19 are secured to the upper portion of the frame and the similar jacket members 20 are secured to the lower portion of the frame.
- jackets 19 and 20 are secured to the frames 'only through a small portion of their periphery, the remainder of which remains flexible and free to be drawn in contact with the rolls.
- the adjusting bolts 21 are threaded through ing the upturned edges 24.- and 25 of the jackets 19 and 20.
- the jacket 19 is provided with a lining 26 of asbestos or similar heat insulating material.
- plurality of heating elements 27 are secured upon the inner face of the insulating material and are provided with the connector lugs 28.- The several heating elements are connected in parallel by the connectors 29.
- ment 27 is shown in,” full lines in its normal or cooled state. how the element will be bowed. outwardly when it expands upon being heated. This outward bowing of the element will force it into intimate contact with the roll 11.
- heating element is shown in The i
- the transverse frame members 22 are provided with the enlarged ends 23 engag-l from such elements'to the rolls during an initial heating period at a relatively low rate, whereby the heat is distributed through the roll in a manner to minimize internal stresses, and subsequently connecting such heating sections in series parallel whereby the rate of heat supply is increased.
- each of said heatingio elements comprising a resistor arranged to have a varying heating efl'ect longitudinally of the corresponding element.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Description
March 29 1927. I I 1,622,286
R. L. MOINTOSH ET AL METHOD AND APPARATUS FOR HEATING ROLLS Filed March 1924 2 Sheets-Sheet 1 alga rolled. -Expressed in other language, during the preliminary heating the heat is of low intensity whereby to permit the relatively uniform distribution thereof throughout the rolls to prevent damage due to strains produced by too rapid local expansion, After the preliminary heating a heat at a higher intensity is applied to bring the rolls to the propertemperature and to the proper conformation at the same time.
It is an obj ect of the present invention to provide a new and improved method and ap aratus for heating rolls.
t is a further object to provide apparatus of this character which is relatively light and which may be moved about and applied to the rolls without moving them from the roll stands.
- It is an additional object to provide a heater in which the degree of heat may be controlled and in which distribution of the heat to the various portions of the roll'may be roperly' taken care of.
I? is also an object of the present invention toprovide heating means in which the heat may be transmitted to the rolls by direct metallic contact.
Other and further objects of the invention will appear as the description proceeds.
Efiorts have heretofore been made to heat rolls by the application of steam jackets or by blowing heated air or gases upon the rolls. These methods do not allow for an adequate temperature range or" control of the temperature, or of application of differing amounts of heat to the various portions of the roll. Moreover, they do not allow.
for the application of heat by the most economical method of direct metallic contact. Since the rolls vary in diameter and contour due to variation in heat, it is essential that the heating means be flexible if it is ,to maintain contact with the rolls throughout the heating ope-ration.
We have illustrated inthe accompanying drawings, a preferred embodiment of our invention. It a In these drawin Figure 1 is an e evation with the heating means applied to the rolls in the stand, the rolls being shown in section;
Figure 2 1s a view on an enlarged scale.
of a portion of Figure 1, showing in detail the connection of the heating elements;
"Figure 3 is a fragmentary view showing the heater applied to the rolls as seen from the right of Figure 1;
Figure 4 is a detail view, partly broken away showing one of, the heating elements; F1 re 5 is a fragmentary view illustrating t e contact of the heating element with a the roll; amr Figures 6, 7 and 8 are somewhat diagrammatic v1ews illustrating circuits suitable for our heating means.
Referring particularly to Figure 1, the upper roll 11 and lower roll 12 are shown supported in ausual type of roll stand 13. This roll stand which is of usual construction, forms no part of-our present invention and will not be described in detail. The roll heater comprises two separate elements A and B, one of which is applied to each side of thepair of rolls. These elements are exactly similar and the description. of one ap lies to the other. The elements comprise a rame 14 of angle bars from which the handles 15 extend-at the upper end and the rollers 16 extend at the lower end. The two elements A and B are clamped together by means of the bolts 17 and 18 at their upper and lower ends. The flexible jacket members 19 are secured to the upper portion of the frame and the similar jacket members 20 are secured to the lower portion of the frame. It Will be noted that the jackets 19 and 20 are secured to the frames 'only through a small portion of their periphery, the remainder of which remains flexible and free to be drawn in contact with the rolls. The adjusting bolts 21 are threaded through ing the upturned edges 24.- and 25 of the jackets 19 and 20.
As shown indetail in Figure 2 the jacket 19,is provided with a lining 26 of asbestos or similar heat insulating material. plurality of heating elements 27 are secured upon the inner face of the insulating material and are provided with the connector lugs 28.- The several heating elements are connected in parallel by the connectors 29.
portions not in direct contact with heating elements. It is to be understood, however,
that although the greatest efliciency is.
accomplished maintaining the heating elements in contact with the roll, it is possible to heat the roll without direct nietallic contact. j .1 1 Referring now to Figure 5, the heat ele-.
One form of heating element is shown in The i In dotted lines is indicated the transverse frame members 22 and are provided with the enlarged ends 23 engag-l from such elements'to the rolls during an initial heating period at a relatively low rate, whereby the heat is distributed through the roll in a manner to minimize internal stresses, and subsequently connecting such heating sections in series parallel whereby the rate of heat supply is increased.
10. In combination, a roll, a pair of electrical heating elements extending longitumemes dinally of said roll, each of said heatingio elements comprising a resistor arranged to have a varying heating efl'ect longitudinally of the corresponding element.
Signed at Chicago, Illinois, this 26th day of Feb, 1924.
ROBERT L. MCINTOSH. GORDON FOX.
Publications (1)
Publication Number | Publication Date |
---|---|
US1622286A true US1622286A (en) | 1927-03-29 |
Family
ID=3412052
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US1622286D Expired - Lifetime US1622286A (en) | Method and apparatus for heating rolls |
Country Status (1)
Country | Link |
---|---|
US (1) | US1622286A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4610617A (en) * | 1983-02-10 | 1986-09-09 | Sulzer-Escher Wyss Ag | Heat insulating protective shields for two-roll calender with heated rolls |
-
0
- US US1622286D patent/US1622286A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4610617A (en) * | 1983-02-10 | 1986-09-09 | Sulzer-Escher Wyss Ag | Heat insulating protective shields for two-roll calender with heated rolls |
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