JPH079359B2 - Induction heating device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an induction heating device, and more particularly to an induction heating device that induction heats a long metal material for forging, for example.

[Conventional technology]

Conventionally, when inductively heating a long metal material, for example,
As disclosed in Japanese Patent Laid-Open No. 57-2127, a plurality of induction heating coils are provided, and a conveyance roller is arranged between the induction heating coils to convey a long metal material to be heated.

FIG. 3 is a front view of a conventional induction heating device of this type,
Further, FIG. 4 is a plan view thereof.

In the figure, reference numeral (1) is a plurality of induction heating coils provided on the same axis, and (2) is a long metal material (hereinafter referred to as bar material) which is a material to be heated in the induction heating coil (1). A feeding roller for feeding (6), a feeding roller (3) for feeding the bar material (6) to the next induction heating device (1), and a feeding roller (4) for feeding the bar material (6) to the next induction heating device (1). Bar material (6)
A support roller that supports the above, and (5) is a pedestal on which the above-mentioned parts are installed.

Next, the operation of the conventional device will be described.

The bar material (6) is supported by the supporting roller (4) and is applied with thrust by the feeding roller (2) to be fed into the induction heating coil (1), and the induction heating coil (1) is also provided.
Sent by a conveying roller (3) provided between
Each time it passes through the induction heating coil (1), it is heated to the final target temperature.

Although not shown, normally, when passing through this induction heating device, a forging machine with a shear is installed next to the bar, and the shear cuts the bar material (6) into a predetermined length. The formed bar material is forged by a forging machine. In this case, the bar material (6) that has left the transport roller (3) is pushed by the following bar material (6), is sent to the final end, and is cut.
Forged.

In the case of the conventional device, if the forging machine (not shown) fails, the entire line is stopped, but the bar material (6) is
Depending on the timing of the failure, various lengths will remain.

On the other hand, the bar material (6) is heated to the forging temperature (about 1250 ° C.) when it exits the final induction heating coil (1) over the entire length. However, if you stop as above,
Depending on how long it has been stopped, the temperature will drop, so it is usually necessary to reheat when the forging operation is resumed.

Therefore, it is necessary to return the bar material (6) to the first induction heating coil (1) before restarting the forging work. However, with respect to the pitch 1 between the conveying rollers (3) shown in FIG. When the remaining material is less than 2 liters, it is impossible to automatically return the bar material (6) by reversing the conveying roller (3). Using an instrument such as a beak, the induction heating coil (1) was lifted and returned.

[Problems to be Solved by the Invention]

As described above, when the unprocessed bar material (6) is returned, it is necessary to reduce the pitch l between the transport rollers (3) in order to facilitate the return. Therefore, it is necessary to reduce the length of the induction heating coil (1).

However, it is originally desirable to increase the length of the induction heating coil (1) to improve efficiency and reduce the equipment cost. Therefore, the length of the induction heating coil (1) is shortened as described above. Efficiency decreases, the number of induction heating coils (1) increases, the equipment cost increases, and it is also disadvantageous in terms of maintenance. Therefore, the length of the induction heating coils (1) cannot be shortened. However, there is a problem that the return cannot be automatically performed, and the conventional device has a problem to solve such a problem.

The present invention has been made to solve the above problems, and an induction heating device capable of returning an untreated bar material as short as possible without shortening the length of the induction heating coil. Aim to get.

[Means for Solving the Problems]

The induction heating device according to the present invention includes at least one induction heating coil provided on the same axis and a plurality of induction heating coils provided coaxially with the induction heating coil to convey the material to be heated. A single conveying roller, a plurality of reverse conveying rollers for conveying the return material arranged in parallel with the axis of the induction heating coil, the induction heating coil, the conveying roller and the reverse conveying roller are mounted. And a movable carriage configured to be movable in a direction perpendicular to the axial direction of the induction heating coil, and a pitch dimension between the reverse transport rollers is a dimension that enables the transport of a short return material. It is set.

[Action]

Since the induction heating device in this invention is configured as described above, when the material to be heated is conveyed, the axis of the induction heating coil is aligned with the feed line of the material to be heated by moving the moving carriage. When the material to be heated is transported in the same manner as in the conventional case, the reverse carriage roller is aligned with the feed line of the material to be heated and reversed by the movement of the moving carriage, and the material to be heated is returned.

〔Example〕

The present invention will be described below with reference to the drawings showing an embodiment thereof. In the figure, the reference numerals (1) to (6) are the same as or equivalent to those shown by the same reference numerals in the conventional apparatus.

In FIG. 1, reference numeral (8) is an induction heating coil (1).
It is installed parallel to the axis of the
A reverse conveyance roller for returning the residual material obtained by cutting the bar material (6), and a motor for driving the reverse conveyance roller (8) is a conveyance roller (3) provided between the induction heating coils (1). It is also used as a motor (9a) for driving the motor and is provided separately from the motor (9b) for the feeding roller (2).

The respective reverse conveying rollers (8) are linked to each other by a line shaft or a chain so that they can be interlocked with each other.

Conveying rollers (3) for conveying the bar material (6) during this heating
The transport system (10) including the heating coil (1) and the reverse transport system (11) including the reverse transport roller (8) for returning the residual material are both mounted on the moving carriage (7). , Induction heating coil (1) with respect to the axis of induction heating coil (1), that is, the feeding line, for example, the pass line (12) of the forging machine
The moving carriage (7) can be moved in a direction perpendicular to the pass line (12) so that either the conveying system (10) or the reverse conveying system (11) for returning the residual material can be selected. It is like this.

Although not shown, a contact switch capable of automatically connecting and disconnecting the induction heating coil (1) and the power source is built in the lower part of the gantry (5). Therefore, when moving the induction heating coil (1), there is no problem in processing the power supply line. Further, the wiring relationship of the motor or the like is naturally connected by a flexible electric wire or the like, and moves in the connected state.

Next, the operation of the above embodiment will be described.

Now, it is assumed that normal operation is performed in the state shown in FIG.

The feeding roller (2) driving motor (9b) and the conveying roller (3) driving motor (9a) are synchronized by giving the same rareness.

When the forging machine is stopped during operation, the rest of the bar material (6) remaining in the induction heating coil (1) must be returned, but the trailing end of the return material is the feed roller ( At the stage of passing through 2), the moving carriage (7) is moved at a right angle to align the reverse conveying system (11) with the pass line (12), and the reverse conveying roller (8) for the return material is moved to the pass line (12). ) To suit.

Then, the return material contained in the forging machine is retracted by reversely rotating the feed roller (not shown) of the forging machine, and the return material has returned to the exit point of the induction heating device (1). Then, the motor (9a) is reversely rotated to retract the return material.

Although the above embodiment shown in FIG. 1 describes only the basic configuration, the operation of the transport roller (3) is performed because the transport roller (3) and the reverse transport roller (8) are jointed. Above all, the reverse conveying roller (8) for the unnecessary return material is rotating. Therefore, in actuality, a cover or the like is required to prevent danger, or it may be disengaged with a clutch or the like. Further, in some cases, safety may be further improved by providing driving motors separately.

Next, as another embodiment, as shown in FIG. 2, various types of induction heating coil (1a) and conveying roller (3a) types are mounted on the moving carriage to allow various types of objects to be received. It can also be adapted to the heating material.

With this configuration, the induction heating coil can also be replaced according to the bar material diameter, which can also contribute to the improvement of the operating rate.

Further, the reverse conveying roller for the return material may be simplified by making a part thereof a free roller, or when the moving force is given to the return material by other means, the whole is made a free roller. You can also

〔The invention's effect〕

As described above, according to the present invention, at least one induction heating coil provided on the same axis, and the induction heating coil for carrying the material to be heated are provided coaxially. A plurality of carrying rollers, a plurality of reverse carrying rollers for carrying the return material, which are arranged parallel to the axis of the induction heating coil, and the induction heating coil, the carrying roller and the reverse carrying roller. And a moving carriage configured to be movable in a direction perpendicular to the axial direction of the induction heating coil, and a pitch dimension between the reverse conveying rollers enables conveyance of a short return material. Being dimensioned, the residual material can be automatically returned to shorter ones without shortening the length of the induction heating coil, thus making it suitable for heated materials that have traditionally been hot and heavy. Surplus material processing the material to be heated which has been a task inherently dangerous has the effect of induction heating apparatus is obtained very easily performed.

[Brief description of drawings]

FIG. 1 is a plan configuration diagram of an embodiment of the present invention, FIG. 2 is a plan configuration diagram of another embodiment of the present invention, FIG. 3 is a schematic front view of a conventional induction heating device, and FIG. FIG. 3 is a plan view of FIG. 3. (1), (1a) ... induction heating coil, (2) ... feeding roller, (3), (3a) ... conveying roller, (6) ... heated material (long metal material, bar material) ), (7) …… Mobile cart,
(8) …… Reverse conveying roller, (12) …… Axial direction of induction heating device (feeding direction, pass line). In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. At least one device provided on the same axis.
A plurality of induction heating coils, a plurality of conveying rollers provided coaxially with the induction heating coil for conveying the material to be heated, and a return arranged parallel to the axis of the induction heating coil. A plurality of reverse transport rollers for transporting the material, the induction heating coil, the transport roller and the reverse transport roller are mounted and configured to be movable in a direction perpendicular to the axial direction of the induction heating coil. It is equipped with a moving carriage, and the pitch dimension between the above-mentioned reverse transport rollers is
An induction heating device characterized in that it is set to a size that enables the conveyance of short return material.