JPH072604Y2 - Coil tail heat treatment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a coil tail end heat treatment apparatus for metal strips.

[Prior Art] In cold rolling, the rolling at the front and rear ends of the hot coil is not only unsteady, but also the metal flow changes and abnormal tension and shearing force locally act to lead to plate rupture. Sometimes. As a countermeasure against this, in Japanese Patent Publication No. 47-47780, the end portion is pretreated by a grinder, and in Japanese Patent Laid-Open No. 63-6283, the shear clearance is increased when the hot coil is sheared, and the work-hardened layer is specified. A method has been proposed in which it is collected in the upper layer part and is removed so that it can be easily maintained.

[Problems to be Solved by the Invention] Since the conventional technology is configured as described above, it has the following problems.

(1) Since the work-hardened layer is mechanically removed by shearing, there is a possibility that a new defect will occur due to work scraps.

(2) When performing machining, accurate shape management is required.

(3) Since the work is performed in the metal strip coil rolling line, the efficiency is reduced and there is a safety problem.

[Means for Solving the Problems] A coil tail end heat treatment apparatus according to the present invention includes a sensor for detecting a coil tail end located on the inner diameter side of a metal strip coil, and a heater at its tip, and The coil tail end heat treatment apparatus is provided with a mechanism for moving the tip portion to the position.

[Operation] In the present invention, the coil tail end heat treatment apparatus detects the coil tail end located on the coil inner diameter side of the metal strip coil, moves the tip end of the coil heater to the position, and the coil heater ends the tail end. Is heat-treated.

Therefore, since the heat treatment can be performed in the coil state, it is not necessary to provide the coil in the cold rolling line, and the coil state can be easily processed in the offline before the cold rolling or in the conveying path.

[Embodiment] FIG. 1 is an explanatory view of an embodiment showing the present invention. From the previous step (usually the pickling step) in cold rolling to the coil 2
Is mounted on a conveyor saddle 3 of a coil conveyor (not shown) and is conveyed to a predetermined position. First, the coil tail end heat treatment apparatus 1 detects the coil end face by a coil end face detection sensor (not shown) and moves to the end face position. In the coil tail end heat treatment apparatus 1, the coil tail end detection sensor 4 and the induction heater 5 are rotatable by a rotating mechanism 6 and are coaxial with each other. The rotating mechanism 6 can be lifted and lowered by a lifter 7, and the coil tail end heat treatment apparatus 1 can be self-propelled on a slide base 8 in the coil axis direction. Next, the lifter moves the rotating mechanism to a predetermined coil inner diameter position and guides the coil tail end detection sensor to the coil inner diameter portion. The rotating mechanism detects the coil tail end by rotating the coil tail end detection sensor once in the inner diameter portion of the coil. With this information, the rotating mechanism guides the induction heater to the tail end of the coil and causes the tail end to follow. During this time, the induction heater heats the tail end of the coil and heat-treats it. After the heat treatment is completed, the coil tail end detection sensor and the induction heater are returned to their original positions. In this embodiment, the eddy current type sensor is used as the coil tail end detection sensor, but a contact type sensor or a sensor based on another principle may be used.

The cold rolling to which the device of the present invention is applied is carried out not only for the cold rolling of the hot coil but also for the temper rolling after the coil tip shearing after annealing and the multiple cold rolling with or without intermediate annealing. It is possible.

[Effects of the Invention] As described above, according to the present invention, since the coil tip before cold rolling is heated by the induction heater and heat treatment is performed, the work-hardened portion of the metal strip in the previous step is softened and cooled. There is an effect that the metal flow at the coil tip in the hot rolling is normalized, breakage of the tip portion does not occur during rolling, and the yield and the roll unit are improved.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an embodiment of the present invention. 1 ... Coil tail end heat treatment device, 2 ... Coil, 3 ... Conveyor saddle, 4 ... Coil tail end detection sensor, 5 ... Induction heater, 6 ... Rotation mechanism, 7 ... Lifter, 8 ... Slide base.

Claims (1)

[Scope of utility model registration request] 1. A coil tail comprising a sensor for detecting a coil tail end located on a coil inner diameter side of a metal strip coil, a heater provided at a tip end portion thereof, and a mechanism for moving the tip end portion to the position. Edge heat treatment equipment.