JP3487391B2 - Coil end face heating device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coil end face heating apparatus for heating both end faces of a coil in a hot rolling facility. 2. Description of the Related Art As shown schematically in FIG.
It is rolled to a bar of 0 to 50 mm thickness and then further rolled to a strip of several mm thickness in a finishing mill. In this case, there is a problem that it takes a long time from the completion of the rough rolling to the completion of the finish rolling, the temperature of the rear end of the bar becomes lower than that of the front end, and uniform finishing is difficult. Therefore, as schematically shown in FIG. 4 (B), a method has been disclosed in which a bar after rough rolling is wound into a coil and finish-rolled while unwinding the bar (Japanese Patent Publication No. 51-51). 26317). According to this method, since the entire bar is prevented from being cooled and the finish rolling is performed from the rear end in the rough rolling, the temperature difference between the front and rear ends of the bar can be made substantially the same. [0004] However, even in this case, there is a problem that the coil ends are easily cooled as compared with the central portion in the width direction, so that it is difficult to equalize the temperature in the width direction. Therefore, in order to solve this problem, a method of transferring the coil while keeping it warm with a heat shield panel (Japanese Patent Publication No. Hei 5-503040),
A method of heating an end face of a coil (Japanese Patent Laid-Open No. 7-51726)
No.) has been proposed. FIG. 5 is a diagram showing a coil heating device proposed in Japanese Patent Laid-Open No. 7-51726. As shown in FIG. 5, both end surfaces 2 and 2 of the coil 1 are heated by a heating device 7 having a plurality of LPG burners. The heating device 7 can be moved to an optimum distance according to the coil width by the position adjusting device 8. [0006] However, when the space between the burner and the coil end face is open as in the above-described coil heating device, much of the heat of the burner escapes upward. ,ineffective. The present invention has been made to solve the above problems. That is, an object of the present invention is to provide a coil end surface heating device that can efficiently heat a coil end surface with a simple structure. According to the present invention, after a hot-rolled material is roughly rolled, the hot-rolled material is wound into a coil without a core, and the coil is unwound on a finish rolling line. A coil end surface heating device for heating both end surfaces of the coil, comprising: a heating panel in which a plurality of burners are integrated; and a heating panel support member for supporting a plurality of the heating panels in the vicinity of the coil end surface, A burner near the upper end of the heating panel support member is directed obliquely downward, thereby providing a coil end surface heating device. According to the configuration of the present invention described above, since the burner near the upper end of the heating panel support member faces obliquely downward, the hot air rising from below is pressed down and sealed, and the heat of the lower burner is reduced. Escape to the upper part can be suppressed. In addition, by integrating a plurality of burners into a heating panel and supporting the heating panel near the coil end surface with the heating panel support member, the burner near the upper end of the heating panel support member can be easily turned obliquely downward. it can. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. In each of the drawings, the same reference numerals are given to portions common to the related art, and description thereof will be omitted. FIG. 1 is a sectional view of a coil end surface heating apparatus according to the present invention. The coil end surface heating device 3 shown in the figure comprises a heating panel 5 in which a plurality of burners 4 are integrated, and a heating panel support member 6 for supporting a plurality of the heating panels 5 near the coil end surface 2. The burner 4 of the heating panel 5 supported on the upper end of the panel support member 6 is directed obliquely downward by an angle θ. The coil 1 is wound or unwound without a core by a bending roll or guide roll (not shown), and the coil end surface heating device 3 of the present invention winds or unwinds the coil 1. Is used when The heating panel 5 is a refractory. For example, a castable refractory or the like is used so that the burner 4 can be formed. Further, the heating panel 5 is provided with a header 9 for supplying fuel to each burner 4. When the coil 1 is wound or unwound, the header 9 is passed through a fuel supply pipe (not shown) via the header 9. The combustion gas is sent to the burner 4 and ignited. The angle θ of the burner 4 of the heating panel 5 supported on the upper end of the heating panel support member 6 depends on conditions such as the size of the coil 1, the number of the burners 4 installed in the coil end surface heating device 3, and the heating temperature. Depends on The heating panel supporting member 6 is connected to a position adjusting device (not shown), and supports the heating panel 5 having a plurality of burners 4 near the coil end surface 2.
Although only one side is shown in the figure, the above-described coil end surface heating device 3 is provided on both end surfaces of the coil 1. According to the coil end surface heating device 3 of the present invention described above, when the coil 1 is wound or unwound,
The combustion gas is fed into the burner 4 and ignited to heat the coil end face 2. As shown in the drawing, the entire coil end face 2 is heated, so that the coil end face 2 is evenly heated. Further, since the space between the burner 4 and the coil end surface 2 is open, the heat of the burner 4 which is released tends to escape upward, but the burner 4 of the heating panel 5 at the upper end of the heating panel support member 6 Because it faces obliquely downward, it acts to contain the heat that escapes upward. Therefore, the coil end face 2 can be efficiently heated in a short time. Further, as shown in FIG. 2, only a part of the burners 4 of the heating panel 5 may be directed obliquely downward by an angle θ, or as shown in FIG. A plurality of heating panels 5 facing obliquely downward may be provided. Further, although not shown, the heating panel 5 provided with the burner 4 horizontally may be fixed to the heating panel support member 6 so as to face obliquely downward by the angle θ. The coil end face heating device 3 of the present invention aims at suppressing a decrease in heating efficiency due to the opening of the space between the burner 4 and the coil 1.
Not only the upper end but also the burner 4 on the outer periphery may be provided inward. It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the spirit of the present invention. According to the above-described coil end surface heating apparatus of the present invention, since the burner near the upper end of the heating panel support member faces obliquely downward, the hot air rising from below is pressed down and sealed. It is possible to suppress the heat from escaping upward. Therefore, the coil end surface can be efficiently heated in a short time, the heat radiation from the coil end surface can be suppressed, and the temperature in the width direction of the coil can be made uniform. Further, since the entire surface of the coil end surface is heated, the coil end surface can be evenly heated. Furthermore, by integrating a plurality of burners into a heating panel and supporting the heating panel near the coil end surface with the heating panel support member, the burner near the upper end of the heating panel support member can be easily directed obliquely downward. It has an excellent effect that the coil end face can be efficiently heated with a simple structure.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a coil end surface heating device of the present invention. FIG. 2 is a view in which only some of the burners of the heating panel face obliquely downward by an angle θ. FIG. 3 is a view in which a plurality of heating panels whose burners face obliquely downward by an angle θ are provided. FIG. 4 is a diagram schematically showing a hot rolling facility that performs finish rolling after rough rolling. FIG. 5 is a diagram showing a coil heating device proposed in Japanese Patent Application Laid-Open No. 7-51726. [Description of Signs] 1 Coil 2 Coil end surface 3 Coil end surface heating device 4 Burner 5 Heating panel 6 Heating panel support member 7 Heating device 8 Position adjusting device 9 Header

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-124309 (JP, A) JP-A-3-193217 (JP, A) Japanese Utility Model Showa 55-177907 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) B21B 45/00 B21B 1/26 B21C 47/26 C21D 1/52

Claims (1)

(57) [Claims 1] After roughly rolling a hot-rolled material, the hot-rolled material is wound into a coil without a core, and both ends of the coil are rolled on a line for finish rolling while unwinding the coil. A coil end surface heating device for heating a surface, comprising: a heating panel in which a plurality of burners are integrated; and a heating panel support member for supporting a plurality of the heating panels in the vicinity of the coil end surface. Wherein the burner near the upper end of the coil faces obliquely downward.