JP7191894B2 - Induction heating device and its control method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating apparatus configured to switch between two heating furnaces and a method of controlling the same, and more particularly to an induction heating apparatus and a method of controlling the same that can easily switch between heating furnaces. It is.

Various induction heating devices have been proposed (see Patent Document 1, for example). The induction heating device described in Patent Document 1 has two heating furnaces arranged vertically, and the two heating furnaces can be switched by a large lifting device arranged below the heating furnace. rice field.

When switching the heating furnace, it was necessary to reconnect the power cable that supplies power to the coil and the cooling water circulation hose that supplies cooling water to the coil. In order to move the two heating furnaces upward at the same time, it was necessary to operate a large lifting device. The work of switching the heating furnace was large-scale and not easy to do.

Japanese Patent Laid-Open No. 06-265280

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an induction heating apparatus and a method of controlling the same, which can facilitate switching of heating furnaces.

An induction heating apparatus for achieving the above object comprises two heating furnaces for heating while moving the billet with the axial direction of the billet as the conveying direction, and the heating furnace used for heating the billet. and a mounting table supporting the two heating furnaces in a state switchable between the two heating furnaces, wherein the mounting table extends in a width direction perpendicularly crossing the conveying direction, and the upper side of the mounting table an opening that communicates with the lower side, a slide part that supports the two heating furnaces arranged side by side in the width direction in a slidable state in the width direction, and a cover that closes at least part of the opening characterized by having

A method of controlling an induction heating apparatus for achieving the above object comprises two heating furnaces for heating while moving the billet with the axial direction of the billet as the conveying direction, and the heating furnace used for heating the billet. In a control method for an induction heating device comprising a mounting table supporting two heating furnaces in a state switchable from one to the other, the mounting table extends in the width direction perpendicularly crossing the conveying direction and is above the mounting table. An opening that communicates between the side and the lower side, and a slide portion that supports the two heating furnaces arranged side by side in the width direction so as to be slidable in the width direction are formed in advance in the mounting table. The heating furnace arranged above the mounting table and the cooling mechanism arranged below the mounting table are connected in advance by a cooling water circulation hose through the opening, and the cooling water circulation hose is connected in advance. The heating furnace is switched by moving the slide portion in the width direction while maintaining the connected state.

According to the present invention, the heating furnace arranged above the mounting table and the cooling mechanism, power source, etc. arranged below can be connected by a hose or cable penetrating through the opening. Since the heating furnace can be switched while the hose or the like is connected, it is advantageous for easily performing switching work of the heating furnace.

It is explanatory drawing which illustrates an induction heating apparatus by side view. It is explanatory drawing which illustrates an induction heating apparatus by planar view. FIG. 3 is an explanatory diagram illustrating an AA arrow view of FIG. 2; FIG. 4 is an explanatory diagram illustrating a state in which the heating furnace in FIG. 3 is switched;

An induction heating device and a control method thereof will be described below based on an embodiment shown in the drawings. In the drawing, the arrow x indicates the conveying direction, which is both the axial direction of the billet and the direction in which the billet is conveyed, the arrow y indicates the width direction perpendicular to the conveying direction, and the arrow z indicates the vertical direction.

As exemplified in FIG. 1 or FIG. 2, the induction heating apparatus 1 includes a conveying mechanism 3 for conveying a rod-shaped billet 2 with its axial direction being the conveying direction x, and the billet 2 supplied by the conveying mechanism 3. A heating furnace 4 that heats with a coil that does not rotate, and a mounting table 5 that supports at least the heating furnace 4 out of the conveying mechanism 3 and the heating furnace 4 from below. The billet 2 is formed in, for example, a columnar shape or a prismatic shape. In FIGS. 1 and 2, the directions in which the billet 2 moves are indicated by white arrows for explanation.

The conveying mechanism 3 includes, for example, a chain conveyor 6 that conveys the billet 2 placed on the upper surface along the conveying direction x, and a pair of pinch rollers 7 that push out the billet 2 toward the heating furnace 4 while sandwiching the billet 2 in the vertical direction z. , and a skid rail 8 for sliding the billet 2 pushed out by the pinch roller 7 in the conveying direction x. The skid rail 8 is composed of a pair of rod-shaped members arranged opposite to each other with a gap in the width direction y. The skid rails 8 include an upstream skid rail 8a arranged upstream of the heating furnace 4, an internal skid rail 8b arranged inside the heating furnace 4, and a downstream skid rail 8b arranged downstream of the heating furnace 4. rail 8c. A plurality of billets 2 successively pushed out by pinch rollers 7 are supplied to heating furnace 4 while sliding on skid rails 8 in contact with each other, and then pushed out from heating furnace 4 .

The configuration of the transport mechanism 3 is not limited to the above. The transport mechanism 3 may have any other structure as long as it has a structure capable of supplying the billet 2 to the heating furnace 4 .

As illustrated in FIG. 2, the induction heating device 1 has two heating furnaces 4 in this embodiment. The two heating furnaces 4 are arranged side by side in the width direction y. The two heating furnaces 4 are mounted on the slide portion 9 of the mounting table 5 . The slide portion 9 is arranged above the mounting table 5 so as to be slidable in the width direction y. As illustrated in FIGS. 1 and 2, the slide portion 9 has wheels 10 on its lower surface. The slide portion 9 is configured to be movable in the width direction y along a guide 11 arranged on the upper surface of the mounting table 5 and extending in the width direction y. The two heating furnaces 4 are supported by a slide portion 9 so as to be slidable in the width direction y.

The induction heating device 1 may have three or more heating furnaces 4 . A plurality of heating furnaces 4 are mounted on the slide portion 9 in a state of being arranged in the width direction y.

The mounting table 5 is composed of a flat member. The mounting table 5 is supported from below by a column member or the like extending in the vertical direction z. The mounting table 5 has an opening 12 that extends in the width direction y and communicates between the upper side and the lower side of the mounting table 5, and a cover 13 that closes at least a portion of the opening 12. . In this embodiment, an opening 12 is formed in the mounting table 5 at a position near the end on the downstream side (right side in FIG. 1) of the heating furnace 4 . The opening 12 is, for example, rectangular in plan view. As illustrated in FIG. 2, the opening 12 is, for example, rectangular in plan view. The shape of the opening 12 is not limited to this, and it is sufficient that it penetrates at least the mounting table 5 in the vertical direction z. The opening 12 is partially closed in plan view by the heating furnace 4 and the slide portion 9 . Most of the openings 12 extending on both sides in the width direction y of the heating furnace 4 in plan view are closed by covers 13 .

As illustrated in FIG. 1 , a cooling mechanism 14 for supplying cooling water to the heating furnace 4 and a power source 15 for supplying electric power to the heating furnace 4 are arranged below the mounting table 5 . The two heating furnaces 4 are connected to a cooling mechanism 14 by cooling water circulation hoses 16, respectively.

As illustrated in FIG. 3, the mounting table 5 is formed with an opening 12 extending in the width direction y and passing through the mounting table 5 in the vertical direction z. A cooling water circulation hose 16 is arranged so as to pass through the opening 12 in the vertical direction z. The power source 15 and the heating furnace 4 are connected by a power cable 17 . The power cable 17 may be arranged so as to pass through the opening 12 in the vertical direction z. In this case, the power cable 17 and the cooling water circulation hose 16 may be collectively arranged as a composite cable so as to pass through the opening 12 in the vertical direction z. The power cable 17 may be branched from the composite cable below the mounting table 5 and connected to the power source 15 .

The cover 13 that closes the opening 12 can be composed of, for example, a chain that is bendable with the conveying direction x as its axial direction. The covers 13 are arranged on both sides of the slide portion 9 in the width direction y. One end of the cover 13 is fixed to the slide portion 9 and the other end is fixed near the end of the opening 12 in the width direction y.

When the diameter of the billet 2 to be heated is reduced, for example, the heating furnace 4 is switched from one to the other. The two heating furnaces 4 have, for example, different numbers of coil turns. When switching the heating furnace 4 as illustrated in FIGS. 3 and 4, the slide portion 9 is moved in the width direction y. 3 and 4, the direction of movement of the slide portion 9 is indicated by an outline arrow for the sake of explanation.

The two heating furnaces 4 move in the width direction y while maintaining the connection state of the cooling water circulation hose 16 with the cooling mechanism 14 . The cooling water circulation hose 16 moves in the width direction y inside the opening 12 . Since the switching of the heating furnaces 4 can be completed only by moving the slide portion 9 in the width direction y, the switching operation of the heating furnaces 4 can be performed very easily. In particular, since work such as reconnection of the cooling water circulation hose 16 is completely unnecessary, the work of switching the heating furnace 4 can be easily performed in a short time. If the power cable 17 passes through the opening 12, no work such as reconnection of the power cable 17 is required.

As illustrated in FIGS. 3 and 4, the cover 13 (left side in FIG. 3) disposed on the rear side in the moving direction of the slide portion 9 is tensioned as the slide portion 9 moves, and the tension increases as illustrated in FIG. It is stretched substantially horizontally so as to close the opening 12 . The tension of the cover 13 (right side in FIG. 3), which is arranged on the front side in the moving direction of the slide portion 9, decreases as the slide portion 9 moves, and the cover 13 moves downward from the opening portion 12 as illustrated in FIG. It will be in a state where it can be suspended. As the slide portion 9 moves, one cover 13 closes the opening portion 12, and the other cover 13 is suspended below the opening portion 12 to enter a storage state. The slide portion 9 may have a brake mechanism that fixes the movement in the width direction y after the movement of the slide portion 9 is completed.

A cover 13 composed of a chain automatically opens and closes the opening 12 as it moves to the slide portion 9 . The opening 12 located on the side of the heating furnace 4 is always covered with the cover 13 . It is possible to prevent accidental falls from the opening 12 while the operator is working on the upper side of the mounting table 5. - 特許庁The substantially horizontal chain, which is under increased tension and covers the opening 12, functions as a floor without slack even when a worker climbs on it. This is advantageous for improving the safety of the induction heating device 1 .

The cover 13 is not limited to being made up of chains. The cover 13 may be composed of, for example, a flat lid. In this case, as the slide portion 9 moves, the cover 13 arranged on the front side in the movement direction of the slide portion 9 is moved to a position to close the opening portion 12 on the rear side.

It is possible to dispose the cooling mechanism 14 and the power source 15 below the mounting table 5 . This is advantageous for downsizing the induction heating device 1 .

In the embodiment illustrated in FIG. 2, the upstream skid rail 8a and the downstream skid rail 8c are fixed to the mounting table 5, and only the internal skid rail 8b moves in the width direction y as the heating furnace 4 is switched. Moving. That is, only the internal skid rails 8b are fixed to the respective heating furnaces 4. As shown in FIG.

The upstream skid rail 8 a , the internal skid rail 8 b and the downstream skid rail 8 c may be integrally configured and fixed to the heating furnace 4 . In this case, the entire skid rail 8 moves together with the heating furnace 4 when switching the heating furnace 4 . Even if two heating furnaces 4 each have skid rails 8 with different spacings between the pair of rod-shaped members, the heating furnaces 4 can be easily switched.

1 Induction Heating Device 2 Billet 3 Conveying Mechanism 4 Heating Furnace 5 Mounting Table 6 Chain Conveyor 7 Pinch Roller 8 Skid Rail 8a Upstream Skid Rail 8b Internal Skid Rail 8c Downstream Skid Rail 9 Slide Part 10 Wheel 11 Guide 12 Opening 13 Cover 14 Cooling mechanism 15 Power source 16 Cooling water circulation hose 17 Power cable x Transport direction y Width direction z Vertical direction

Claims (6)

Two heating furnaces for moving and heating the billet with the axial direction of the billet as the conveying direction, and supporting the two heating furnaces in a state in which the heating furnace used for heating the billet can be switched from one to the other. In an induction heating device comprising a mounting table for
The mounting table has an opening extending in the width direction perpendicularly crossing the conveying direction and communicating between the upper side and the lower side of the mounting table, and the two heating furnaces arranged side by side in the width direction. An induction heating device, comprising: a sliding portion that supports in a widthwise slidable state; and a cover that closes at least a portion of the opening. 2. The induction heating apparatus according to claim 1, wherein the cover is composed of a chain that is bendable with the conveying direction as an axial direction, and is arranged on both sides of the slide portion in the width direction. 3. The cover according to claim 2, wherein the cover arranged on the rear side in the movement direction of the slide portion has a structure in which the tension increases as the slide portion moves and the cover is stretched substantially horizontally to close the opening. induction heating device. 3. The cover disposed on the front side in the moving direction of the slide portion has a structure in which the tension is reduced as the slide portion moves and the cover is hung downward from the opening. 3. The induction heating device according to 3. Two heating furnaces for moving and heating the billet with the axial direction of the billet as the conveying direction, and supporting the two heating furnaces in a state in which the heating furnace used for heating the billet can be switched from one to the other. In a method for controlling an induction heating device comprising a mounting table for
The two heating furnaces arranged side by side in the width direction are slidable in the width direction, and the opening extends in the width direction perpendicularly crossing the conveying direction and communicates between the upper side and the lower side of the mounting table. and a slide portion for supporting in a stable state is formed in advance on the mounting table,
The heating furnace arranged above the mounting table and the cooling mechanism arranged below the mounting table are connected in advance by a cooling water circulation hose through the opening,
A control method for an induction heating device, wherein the heating furnace is switched by moving the sliding portion in the width direction while maintaining the connected state of the cooling water circulation hose. Covers that are formed of chains that are bendable with the conveying direction as an axial direction and that close at least a portion of the opening are arranged in advance on both sides of the slide portion in the width direction,
The tension of the cover arranged on the rear side in the moving direction of the slide portion is increased and the opening is closed, and the tension of the cover arranged on the front side is decreased and the tension is directed downward of the opening. 6. The method of controlling an induction heating device according to claim 5, wherein the induction heating device is suspended from the bottom.

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