JPH083631A - Induction heating device - Google Patents

Abstract

PURPOSE:To easily separate the materials to be heated which are stuck by heating, by arranging a bending part at the outlet side of a heating coil, at the time of heating many materials to be heated to a prescribed temp. while passing through the inside of the heating coil. CONSTITUTION:Rotating force of a driving motor 16 is transmitted to an inlet side wheel 13 through a sprocket wheel 17, a roller chain 18 and a sprocket wheel 15 to drive a conveyor 12 in the direction of arrow mark rotationally supported with the inlet side wheel 13 and an outlet side wheel 14. Many materials 1 to be heated are continuously laid on this conveyor 12 and carried and heated to the prescribed temp. by an electromagnetic induction while passing through the inside of a heating coil 11. At this time, a projecting table 21 forming the bending part is arranged in the conveyor 12 at the outlet side of the heating coil 11 so as to separate the stuck materials 1 to be heated. By this method, the materials 1 to be heated stuck by heating, can easily be separated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating apparatus for continuously placing a large number of materials to be heated such as billets on a conveying path mechanism, conveying them and passing them through heating coils to heat them by electromagnetic induction.

[0002]

2. Description of the Related Art FIG. 9 shows, for example, JP-A-57-38586.
It is a block diagram which shows the conventional induction heating apparatus similar to what was disclosed by the publication. In the figure, 1 is a material to be heated such as a billet, 11 is a heating coil for heating the material to be heated 1 by electromagnetic induction, 12 is an infinite belt-like conveyor for continuously mounting and transporting many materials to be heated 1, and 13 is Rotatably supports the conveyor 12,
An input side wheel for driving, 14 an output side wheel for rotatably supporting the conveyor 12, 15 a sprocket wheel directly connected to the input side wheel 13, 16 a drive motor for driving the conveyor 12,
17 is a sprocket wheel directly connected to the drive motor 16, 18
Is a roller chain engaged with both sprocket wheels 15 and 17. Incidentally, in this conventional induction heating device, the conveyor 12, the entry wheel 13, the exit wheel 14, the sprocket wheel 15, the drive motor 16, the sprocket wheel 17,
The roller chain 18 constitutes a transport path mechanism.

Next, the operation will be described. Drive motor 16
Rotating force of sprocket wheel 17, roller chain 1
8. The conveyor 12 is transmitted to the entry side wheel 13 via the sprocket wheel 15 and is rotatably supported by the entry side wheel 13 and the exit side wheel 14, and is driven in the direction of the arrow in the figure. This conveyor
A large number of materials 1 to be heated are continuously placed on 12, and conveyed and heated to a predetermined temperature by electromagnetic induction while passing through the heating coil 11. When the material to be heated 1 is a billet of steel used for hot forging, the heating temperature is usually 1,200 to 1,300.
C, which is close to the melting temperature (1,350 C). The material to be heated 1 heated to a predetermined temperature is sent to the next forging step and is forged one by one to be finished into a predetermined shape.

[0004]

The conventional induction heating apparatus is constructed as described above, and the conveyor 12 is provided with a large number of materials 1 to be heated.
Are continuously placed, conveyed and heated by electromagnetic induction while passing through the heating coil 11, but the heating temperature is close to the melting temperature of the material to be heated 1, and the electromagnetic force acts in the heating coil 11. The materials to be heated 1 may be welded to each other because the materials to be heated 1 may be attracted to each other, or the materials to be heated 1 may be saw-cut so that the cut surface has good finishing accuracy and is easily adhered. When the heated material 1 was sent to the next forging step, it could not be forged and was discarded, and there was a problem to be solved that loss time was generated to remove it.

The present invention has been made to solve the above problems, and an object thereof is to provide an induction heating apparatus capable of separating a material to be heated and welded.

[0006]

SUMMARY OF THE INVENTION An induction heating apparatus according to the present invention places a large number of materials to be heated on a transfer path mechanism, transfers the materials to be heated, and heats them to a predetermined temperature by electromagnetic induction while passing them through a heating coil. In this case, the bent portion for separating the welded material to be heated coming out of the heating coil is provided in the transport path mechanism.

Further, a pad plate for restraining the movement of the material to be heated deposited above the bent portion is provided.

Further, in the one in which a large number of materials to be heated are continuously placed on the transport path mechanism and transported and heated to a predetermined temperature by electromagnetic induction while passing through the heating coil, the transport path mechanism in the heating coil A bent portion is provided at the position where the heated material reaches a predetermined temperature to separate the heated material to be welded.

Next, in the one in which a large number of materials to be heated are continuously placed on the transport path mechanism, transported and heated to a predetermined temperature by electromagnetic induction while passing through the heating coil, welding coming out of the heating coil A weighting mechanism that comes into contact with the tip of the heated material and applies a bending force by weight to separate the material is provided.

Then, in the one in which a large number of materials to be heated are continuously placed on the transport path mechanism and are transported and heated to a predetermined temperature by electromagnetic induction while passing through the heating coil, the welding from the heating coil is performed. A detector that detects the heated material, a cylinder that operates a rod that presses against the welded heated material, a backing plate that constrains the welded heated material that moves by pressing the rod, and a cylinder based on the detection signal from the detector. And a control unit for controlling.

[0011]

In the present invention, the bent portion of the conveying path mechanism separates the welded material to be heated coming out of the heating coil.

Further, the backing plate above the bent portion restrains the movement of the welded material to be heated, and more reliably separates the welded material to be heated.

Further, the bent portion at the position where the material to be heated reaches a predetermined temperature in the conveying path mechanism in the heating coil easily separates the material to be welded.

Next, the weighting mechanism comes into contact with the tip of the welded material to be heated and applies a bending force by the weight to separate it.

When the detector detects the welded material to be heated, the control unit controls the cylinder, and the cylinder operates the rod to press the welded material to be heated, and the cylinder presses the welded material to be welded. Restrain the movement and separate it.

[0016]

【Example】

Example 1. 1 is a block diagram showing a first embodiment of the present invention. In the figure, 1, 11 to 18 are the same as those described in FIG. 9 in the conventional art. Reference numeral 21 is a protrusion stand for forming a bent portion on the conveyor 12 in order to separate the welded material 1 coming out of the heating coil 11.

The first embodiment is configured as described above, and the rotational force of the drive motor 16 is passed through the sprocket wheel 17, the roller chain 18, and the sprocket wheel 15 to the entry side wheel 13.
And the conveyor 12 rotatably supported by the entry wheel 13 and the exit wheel 14 is driven in the direction of the arrow in the figure. A large number of materials 1 to be heated are continuously placed on the conveyor 12, transported and heated in a heating coil 11 to a predetermined temperature close to the melting temperature by electromagnetic induction. Since the conveyor 12 forms a bent portion at the position of the protrusion table 21 and the angle suddenly changes, the heating coil 11
When the preceding heated material 1 of, for example, two heated materials 1 coming out from the surface of the projection stand 21 is lifted, the preceding heated material 1 floats up from the conveyor 12, but is heated by the subsequent weight due to its own weight. It is separated from the material 1 and falls on the conveyor 12, and is sent to the next forging step. Therefore, in the forging step, the welded materials 1 to be heated are conveyed in a state of being separated one by one, and forging of the material to be heated 1 cannot be disabled. In the first embodiment, the conveyor 12, the entry wheel 13, the exit wheel 1
4, the sprocket wheel 15, the roller chain 18, the sprocket wheel 17, and the drive motor 16 constitute a transport path mechanism, but a transport path mechanism including a pinch roller and a transport rail, or a pusher and a transport rail may be used.
The same effect can be obtained by providing a bent portion for separating the material to be heated 1 welded to each of the transport rails.

Example 2. FIG. 2 is a partial configuration diagram showing a second embodiment of the present invention. A patch plate 22 is provided above the bent portion of the conveyor 12 at the position of the projecting stand 21 in the first embodiment, and the welded substrate is placed on the conveyor 12. When the heating material 1 passes the position of the protrusion base 21, the preceding heating material 1 is restrained from floating above the conveyor 12 and moving upward. In the second embodiment, it is possible to more reliably separate the welded material 1 to be heated.

Embodiment 3 FIG. FIG. 3 is a configuration diagram showing a third embodiment of the present invention. In the first embodiment, the bent portion of the conveyor 12 by the protrusion base 21 is provided on the outlet side of the heating coil 11 (see FIG. 1). Then, the heated material 1 in the heating coil 11
Since the bent portion of the conveyer 12 by the protrusion table 21 is provided at a position where a predetermined temperature close to the melting temperature is reached, and the material to be heated 1 starts to be welded at this position, it can be easily separated.

Example 4. 4 is a block diagram showing a fourth embodiment of the present invention, and FIG. 5 is a partial block diagram showing a state in which the material to be heated which is welded in FIG. 4 is separated. In FIGS. 4 and 5, 1, 11 to 18 have already been described. 31 is a weighting roller that comes into contact with the tip of the welded material 1 and 32 is a weighting roller.
31 is an arm that rotatably supports, 33 is a pivot that rotatably supports the arm 32, and 34 is that the tip of the welded material 1 to be heated comes into contact with the weight roller and its rear end moves upward. It is a backing plate that restrains. In this Embodiment 4, the weight roller
A weighting mechanism that comes into contact with the tip end portion of the material to be heated 1 welded by the arm 31, the arm 32, the pivot portion 33, and the contact plate 34 and applies a bending force by weight to separate the weighting material is formed. The fourth embodiment is configured as described above, and the weight roller 31 does not come into contact unless the material 1 to be heated is welded, but comes into contact with the tip of the welded material, and its weight. Is necessary and sufficient to apply a bending force to the welded material 1 to be separated, and the weight is not too large to stop the conveyance of the material 1 to be heated. When the tip of the welded material 1 coming out of the heating coil 11 comes into contact with the weight roller 31, the welded material 11 receives thrust from the conveyor 12 and is pressed against the weight roller 31 to rotate slightly. Then, the rear end thereof comes into contact with the backing plate 34, and the weight of the weighting roller 31 exerts a bending force to separate it. Also in the fourth embodiment, the conveyor 12, the entrance wheel 13, the exit wheel 14, the sprocket wheel 15, the roller chain 18, the sprocket wheel 17, and the drive motor 16 compose a conveyance path mechanism. Alternatively, a transport path mechanism including a pusher and a transport rail may be used, and the same effect can be expected.

Example 5. FIG. 6 is a configuration diagram showing a fifth embodiment of the present invention. In the fourth embodiment, the front end of the welded material 1 comes into contact with the weight roller 31 and the rear end thereof comes into contact with the backing plate 34 to carry out the weighting. Although the bending force is applied by the weight of the roller 31 to separate it (see FIG. 5), in the fifth embodiment, the arm 42 to which the weight 41 is attached is rotatably supported by the pivot 43 and welded. The tip of the material to be heated 1 contacts the arm 42, and the rear end of the material to be heated 1 also contacts the arm 42, and a bending force is applied by the weight of the weight 41 to separate it. In addition, in the fifth embodiment, the weight 41, the arm 42, and the pivot portion 43 form a weight mechanism.

Embodiment 6. 7 is a configuration diagram showing a sixth embodiment of the present invention, and FIG. 8 is a partial configuration diagram showing a state in which the material to be heated welded in FIG. 7 is separated. 7 and 8,
Items 1 and 11-18 have already been explained. Reference numeral 51 is a rod that is pressed against the material to be heated 1, 52 is a cylinder that operates the rod 51, 54 is a backing plate that restrains the heated material 1 that has been welded by the pressing of the rod 51 from moving upward, and 59 is a light beam irradiation. For example, a photoelectric switch is used as a detector for detecting the heated material 1 that has been welded. Reference numeral 61 is an air source containing compressed air for operating the cylinder 52, 62 is a control valve for controlling the compressed air sent from the air source 61 to the cylinder 52, and 63 is a detection signal of the detector 59 that has detected the welded material 1 to be heated. Is a controller for controlling the control valve 62 by In the sixth embodiment, the air source 61, the control valve 62, and the controller 63 form a control unit. The sixth embodiment is configured as described above, and the light beam is constantly emitted from the detector 59 toward the heated material 1 placed on the conveyor 12. When the material 1 to be heated that has been welded and has come out of the heating coil 11 reaches the end of the conveyor 12, the preceding material 1 to be heated comes to project forward, so this is detected by the detector 59 and the detection signal is controlled. To the cylinder 52, and the control valve 62 is controlled to send the compressed air from the air source 61 to the cylinder 52. As a result, the cylinder 52 operates the rod 51 to push it against the preceding heated material 1, and the trailing heated material 1 moving upward is restrained by the contact plate 54 to give a bending force to separate it. In the sixth embodiment, the resistance force to the conveyor 12 is larger than that of the members of the fourth and fifth embodiments that come into contact with the tip end of the material to be heated 1 welded by the weighting mechanism and apply the bending force by the weight to separate it. Therefore, the pressing force of the rod 51 can be sufficiently increased, and the welded material 1 can be reliably separated. In the sixth embodiment, the conveyor 12, the entry wheel 13, the exit wheel 14, and the sprocket wheel 1 are also included.
5, the roller chain 18, the sprocket wheel 17, and the drive motor 16 constitute a transport path mechanism, but a transport path mechanism including a pinch roller and a transport rail or a pusher and a transport rail may be used.

[0023]

As described above, according to the present invention,
Since the transport path mechanism is provided with the bent portion, it is possible to separate the welded material to be heated which comes out of the heating coil.

Further, since the abutting plate for restraining the movement of the welded material to be heated is provided above the bent portion, the welded material to be heated can be more reliably separated.

Further, since the bent portion is provided at the position where the material to be heated reaches a predetermined temperature by the conveying path mechanism in the heating coil, the material to be heated to be welded can be easily separated.

Next, since the weighting mechanism which comes into contact with the tip of the welded material to be heated and applies a bending force by weight, the welded material can be easily separated.

Then, a detector for detecting the welded material to be heated, a cylinder for operating a rod pressed against the welded material to be heated, a backing plate for restraining the welded material to be moved which is moved by pressing the rod, and a detector Since the control unit for controlling the cylinder by the detection signal of the container is provided, the material to be heated that has been welded can be reliably separated.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention.

FIG. 2 is a partial configuration diagram showing a second embodiment of the present invention.

FIG. 3 is a configuration diagram showing a third embodiment of the present invention.

FIG. 4 is a configuration diagram showing a fourth embodiment of the present invention.

5 is a partial configuration diagram showing a state in which the material to be heated that has been welded in FIG. 4 is separated.

FIG. 6 is a configuration diagram showing a fifth embodiment of the present invention.

FIG. 7 is a configuration diagram showing a sixth embodiment of the present invention.

FIG. 8 is a partial configuration diagram showing a state in which the material to be heated welded in FIG. 7 is separated.

FIG. 9 is a configuration diagram showing a conventional induction heating device.

[Explanation of symbols]

1 heated material, 11 heating coil, 12 conveyor, 13 entry side wheel, 14 exit side wheel,
15 sprocket wheel, 16 drive motor, 17
Sprocket wheel, 18 Roller chain 21, Projection stand, 22 Abutment plate, 31 Weight roller, 32 Arm, 33 Pivot,
34 backing plate, 41 weight, 42 arms,
43 Axis, 51 Rod, 52 Cylinder, 54 Abutment Plate, 59 Detector, 61
Air source, 62 control valves, 63 controls.

Claims (5)

[Claims] 1. An induction heating device for continuously placing a large number of materials to be heated on a transfer path mechanism, transferring the materials to be heated, and passing them through a heating coil to heat them to a predetermined temperature by electromagnetic induction. An induction heating device, wherein a bent portion for separating the welded material to be heated is provided in the transport path mechanism. 2. The induction heating device according to claim 1, further comprising a backing plate provided above the bent portion for restraining movement of the welded material to be heated. 3. An induction heating device for continuously placing a large number of materials to be heated on a transport path mechanism, transporting them, and heating them to a predetermined temperature by electromagnetic induction while passing through the heating coils. An induction heating apparatus, characterized in that a bent portion is provided at a position where the material to be heated reaches the predetermined temperature in the transport path mechanism to separate the material to be welded. 4. An induction heating apparatus for continuously placing a large number of materials to be heated on a transfer path mechanism, transferring the materials to be heated, and passing them through a heating coil to heat them to a predetermined temperature by electromagnetic induction. An induction heating apparatus, comprising: a weighting mechanism that comes into contact with the tip end of the heated and welded material and applies a bending force by weight to separate the material. 5. In an induction heating device, wherein a large number of materials to be heated are continuously placed on a transport path mechanism and transported to heat a predetermined temperature by electromagnetic induction while passing through the heating coil. A detector for detecting the heated and welded material to be heated, a cylinder for operating a rod pressed against the heated and heated material, a pad plate for restraining the heated and heated material that is moved by pressing the rod, An induction heating device comprising: a control unit that controls the cylinder according to a detection signal from a detector.