US1906211A - Tensioning device for maintaining a given catenary curve in metal strips continuously pulled through an annealing furnace - Google Patents
Tensioning device for maintaining a given catenary curve in metal strips continuously pulled through an annealing furnace Download PDFInfo
- Publication number
- US1906211A US1906211A US610694A US61069432A US1906211A US 1906211 A US1906211 A US 1906211A US 610694 A US610694 A US 610694A US 61069432 A US61069432 A US 61069432A US 1906211 A US1906211 A US 1906211A
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- United States
- Prior art keywords
- maintaining
- tensioning device
- given
- metal strips
- annealing furnace
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- Expired - Lifetime
Links
- 238000000137 annealing Methods 0.000 title description 6
- 239000002184 metal Substances 0.000 title description 3
- 239000000463 material Substances 0.000 description 11
- 230000007246 mechanism Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
- C21D9/56—Continuous furnaces for strip or wire
Definitions
- the permissible amount of sag is governed first by the shape or form of the furnace inside (the strip must not on principle be allowed to touch the interior of the furnace 1 and should be kept'at a uniform distance from the mufiie walls) and again by the maximum admissible pulling strain for a given cross section and annealing tempera ture of stripwhich may be exerted on such strip, without stretching it.
- the sag is inversely proportional to the tension prevailing in the strip.
- the method of regulating the tension in the case of a uniform pulling drive, by means of brake located at the entrance to the furnace is known.
- the known types of brake are sliding or drag brakes, or roller brakes with hand adjusted braking action.
- This method is toocoarse and unreliable to avoid with certainty that the strips touch the furnace interior, vor that they are not subjected to stretching strain, or to snatch or sudden oscillations caused by temporary retardation or stoppages at Methods are known which maintain a con-.7 stant tension in feeding strip material by varying the pulling force.
- An apparatus is already known withone mechanism for feeding wire or strip material into a heating chamber and with a second mechanism leading the treated ma- 610,694, and in Germany June 16, 1931.
- Another tensioning device isusing a pair of movably mounted pulling rolls with counterpoise for regulating -the pulling force.
- this mechanism In the present invention there is only one mechanism with constant pull for the transport of the material required, this mechanism being located at the side where the material is leaving the furnace. .
- the whole device is very simple. The varying degree of slackness is used for increase or. reduction of the brake action working immediately upon the running material.
- This device can be subdivided laterally in a simple manner for regulating the sag of several strips running through the furnace at the same time.
- Figure 1 is a side view embodying the features of the invention.
- the strip material A to be annealed runs in the direction of the arrow, through the furnace C, pulled by a constant force and guided by the guide rollers B B
- the brake device D At the front end of the furnace is the brake device D, consisting of the lower fixed brake shoe J and the upper movable K.
- the upper shoe of the brake is connected with the lever F which is free to move about the fulcrum E. At the end of lever F is located.
- the feeler roller G which, in continuous contact with the strip as it travels along, gauges its tension. -So long as the tension remains constant, the brake pressure also remains constant. If the tension relaxes, then the feeler roller G sinks down further, thereby increasing the brake pressure. If the tension becomes greater, then the roller G rises with the strip, thereby reducing the brake pressure.
- the lever F is a sliding weight H, which is used for obtaining the normal sag according to thickness and material of the strip, by adjusting it along the lever to the corresponding normal brake pressure.
- the brake effect is originated by the lever F exerting a pressure through the upper shoe K directly upon the passing strip.
- a brake located at the entrance side of the furnace with adjustable braking eflect working directly 'upon the passing strip and a feeler for measuring the slackness of the strip, said feeler coacting with the brake in such manner that with increased slackness the brake is loaded and with increased tension the brake is released.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
Apn] 25, 1933. Q JUNKER 1,906,211 TENSIONING DEVICE FOR MAINTAINING A GIVEN CATENARY CURVE IN METAL STRIPS CONTINUOUSLY PULLED THROUGH AN ANNEALING FURNACE Filed May 11, 1952 driven for:-
Patented- Apr. 25, 1933 UNITED STATES OTTO JUNKER, F LAMHERSDOBF, GERMANY TENSIONING DEVICE FOR MAINTAINING A GIVEN GATE'NABY CURVE IN METAL STRIPS QONTIN UOUSLY PULLED THROUGH AN ANNEALING FURNACE Application filed May 11, 1932, Serial No.
In continuous annealing furnaces with free catenary curve of the heating zone for strip material it is necessary to keep the sag or hang of such material constant by means of adjustment.
The permissible amount of sag is governed first by the shape or form of the furnace inside (the strip must not on principle be allowed to touch the interior of the furnace 1 and should be kept'at a uniform distance from the mufiie walls) and again by the maximum admissible pulling strain for a given cross section and annealing tempera ture of stripwhich may be exerted on such strip, without stretching it. The sag is inversely proportional to the tension prevailing in the strip.
The method of regulating the tension in the case of a uniform pulling drive, by means of brake located at the entrance to the furnace is known. For this purpose the known types of brake are sliding or drag brakes, or roller brakes with hand adjusted braking action. This method however, is toocoarse and unreliable to avoid with certainty that the strips touch the furnace interior, vor that they are not subjected to stretching strain, or to snatch or sudden oscillations caused by temporary retardation or stoppages at Methods are known which maintain a con-.7 stant tension in feeding strip material by varying the pulling force.
An apparatus is already known withone mechanism for feeding wire or strip material into a heating chamber and with a second mechanism leading the treated ma- 610,694, and in Germany June 16, 1931.
terial therefrom, the second mechanism being frictionally driven and the effect 'of such drive being controlled by abrake device actuated in'response to the degree of slackness of the material between the two mechanisms. This method requires a rather complicated arrangement of two different driving mechanisms. The varying degree of slackness is used for controlling, by means of a friction brake, the speed of the mechanism carrying the heated material away from the furnace.
Another tensioning device isusing a pair of movably mounted pulling rolls with counterpoise for regulating -the pulling force. I
Theinertia of this arrangement and therefore the? time lag is considerable. In the present invention there is only one mechanism with constant pull for the transport of the material required, this mechanism being located at the side where the material is leaving the furnace. .The whole device is very simple. The varying degree of slackness is used for increase or. reduction of the brake action working immediately upon the running material. This device can be subdivided laterally in a simple manner for regulating the sag of several strips running through the furnace at the same time.
In the accompanying drawing which illustrates one embodiment of the invention Figure 1 is a side view embodying the features of the invention. The strip material A to be annealed runs in the direction of the arrow, through the furnace C, pulled by a constant force and guided by the guide rollers B B At the front end of the furnace is the brake device D, consisting of the lower fixed brake shoe J and the upper movable K. The upper shoe of the brake is connected with the lever F which is free to move about the fulcrum E. At the end of lever F is located.
the feeler roller G, which, in continuous contact with the strip as it travels along, gauges its tension. -So long as the tension remains constant, the brake pressure also remains constant. If the tension relaxes, then the feeler roller G sinks down further, thereby increasing the brake pressure. If the tension becomes greater, then the roller G rises with the strip, thereby reducing the brake pressure.
n the lever F is a sliding weight H, Which is used for obtaining the normal sag according to thickness and material of the strip, by adjusting it along the lever to the corresponding normal brake pressure. The brake effect is originated by the lever F exerting a pressure through the upper shoe K directly upon the passing strip. Although the illustrated manner is showing the preferred embodiment of the invention, any other known type of brake working directly of the passing strip and any other known means for adjusting the brake pressure and "for coaction between the feeler roller and the brake may be used.
What I claim is:
In a tensioning device for maintaining'a constant catenary curve in metal strips continuously pulled through an annealing furnace, a brake located at the entrance side of the furnace with adjustable braking eflect working directly 'upon the passing strip and a feeler for measuring the slackness of the strip, said feeler coacting with the brake in such manner that with increased slackness the brake is loaded and with increased tension the brake is released.
OTTO JUNKER.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1906211X | 1931-06-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1906211A true US1906211A (en) | 1933-04-25 |
Family
ID=7748664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US610694A Expired - Lifetime US1906211A (en) | 1931-06-16 | 1932-05-11 | Tensioning device for maintaining a given catenary curve in metal strips continuously pulled through an annealing furnace |
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US (1) | US1906211A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2681802A (en) * | 1948-04-20 | 1954-06-22 | Hartford Nat Bank & Trust Co | Device for the conveyance of tapes with the use of rollers |
US2705914A (en) * | 1951-03-26 | 1955-04-12 | Cranston Steel Strapping Co | Quick reversible wire binding machine |
US2731212A (en) * | 1953-02-13 | 1956-01-17 | Richard S Baker | Polyphase electromagnet strip guiding and tension device |
US2746749A (en) * | 1950-10-16 | 1956-05-22 | Huck Company | Means for scanning traveling webs in printing machines and the like |
US2859963A (en) * | 1955-05-02 | 1958-11-11 | David Evans Dairy Engineers Lt | Apparatus for the manufacture of bottle caps from strip metal |
US3558026A (en) * | 1967-09-25 | 1971-01-26 | Rosen Karl I J | Yarn feeder |
US3921876A (en) * | 1972-07-11 | 1975-11-25 | Louis Corse | Device for regulating the tension in webs of material |
US4182635A (en) * | 1976-12-29 | 1980-01-08 | Alcan Research And Development Limited | Method of heat treatment of ductile metal strip |
-
1932
- 1932-05-11 US US610694A patent/US1906211A/en not_active Expired - Lifetime
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2681802A (en) * | 1948-04-20 | 1954-06-22 | Hartford Nat Bank & Trust Co | Device for the conveyance of tapes with the use of rollers |
US2746749A (en) * | 1950-10-16 | 1956-05-22 | Huck Company | Means for scanning traveling webs in printing machines and the like |
US2705914A (en) * | 1951-03-26 | 1955-04-12 | Cranston Steel Strapping Co | Quick reversible wire binding machine |
US2731212A (en) * | 1953-02-13 | 1956-01-17 | Richard S Baker | Polyphase electromagnet strip guiding and tension device |
US2859963A (en) * | 1955-05-02 | 1958-11-11 | David Evans Dairy Engineers Lt | Apparatus for the manufacture of bottle caps from strip metal |
US3558026A (en) * | 1967-09-25 | 1971-01-26 | Rosen Karl I J | Yarn feeder |
US3921876A (en) * | 1972-07-11 | 1975-11-25 | Louis Corse | Device for regulating the tension in webs of material |
US4182635A (en) * | 1976-12-29 | 1980-01-08 | Alcan Research And Development Limited | Method of heat treatment of ductile metal strip |
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