JP7540934B2 - High Frequency Induction Heating Equipment - Google Patents

Description

The embodiment relates to a high-frequency induction heating device.

A high-frequency induction heating device has been disclosed that includes two heating bodies for high-frequency induction heating the workpiece being transported, the two heating bodies being arranged on both sides of the workpiece in a lateral direction perpendicular to the transport direction of the workpiece and arranged along the transport direction, the device includes a support that supports the workpiece, moves in the transport direction, and rotates about a first rotation axis perpendicular to the lateral direction, and a rotor that moves in the transport direction together with the support and rotates about a second rotation axis perpendicular to the lateral direction, and an engagement member that is arranged along the transport direction to engage with the rotor, the rotor moves in the transport direction together with the support while engaging with the engagement member, and rotates, and the support rotates in conjunction with the rotation of the rotor (Patent Document 1).

JP 2019-112694 A

However, when a workpiece is rotated and subjected to high-frequency induction heating, it is required to improve the roundness, etc., of the workpiece.
An object of an embodiment of the present invention is to provide a high-frequency induction heating device that can improve the roundness, etc., of a workpiece when the workpiece is rotated and high-frequency induction heated.

The high-frequency induction heating device according to the embodiment of the present invention comprises a conveying section arranged along the conveying direction in which the workpiece is conveyed, a heating unit arranged on both sides of the workpiece in a horizontal direction perpendicular to the conveying direction and along the conveying direction, and equipped with a heating body for high-frequency induction heating the workpiece, and a work support that moves in the conveying direction by the conveying section, supports the workpiece, is rotatable about a central axis in a vertical direction perpendicular to the conveying direction and the horizontal direction, and is movable up and down in the vertical direction, and the work support comprises a lower support that supports the lower side of the workpiece and is rotatable and movable up and down, an upper support that supports the upper side of the workpiece and is rotatable and movable up and down, and a load increasing section that increases the support load on the workpiece.

According to an embodiment of the present invention, a high-frequency induction heating device is provided that can improve the roundness, etc., of a workpiece when rotating the workpiece and high-frequency induction heating it.

1 is a conceptual top view showing a high-frequency induction heating device 1 according to an embodiment. 2 is a conceptual side view showing the work support portion 30 as viewed from the α direction in FIG. 1 . 3 is a conceptual top view showing the work support portion 30 as viewed from a β direction in FIG. 2 . 2 is a schematic side view showing the high-frequency induction heating device 1 as viewed from a direction A in FIG. 1 . 2 is a schematic side view showing the high-frequency induction heating device 1 as viewed from a direction B in FIG. 1 . 2 is a schematic side view showing the high-frequency induction heating device 1 as viewed from a direction C in FIG. 1 . 2 is a schematic side view showing the high-frequency induction heating device 1 as viewed from a direction D in FIG. 1 . 2 is a schematic side view showing the high-frequency induction heating device 1 as viewed from a direction E in FIG. 1 . FIG. 3 is a schematic side view of the preferred work support 30 of FIG. 2.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Fig. 1 is a top conceptual diagram showing a high-frequency induction heating device 1 according to this embodiment. Fig. 2 is a side conceptual diagram of the work support part 30 as viewed from the α direction in Fig. 1. Fig. 3 is a top conceptual diagram of the work support part 30 as viewed from the β direction in Fig. 2. Figs. 4 to 8 are side conceptual diagrams of the high-frequency induction heating device 1 as viewed from the A, B, C, D, and E directions in Fig. 1, respectively. Fig. 9 is a conceptual diagram for explaining a specific example of the transport part 10 in Fig. 1.

As shown in FIGS. 1 to 5, a high frequency induction heating device 1 according to this embodiment is provided with a transport section 10, a heating unit 20, and a work support 30.
The transport unit 10 is disposed along the transport direction in which the workpiece W is transported.
6, the transport unit 10 includes a conveyor 10A having a plurality of work supports 30 attached at intervals in the transport direction C1. The work supports 30 move in the transport direction C1 as the conveyor 10A moves. The transport unit 10 can employ any configuration as long as it can move the work supports 30 in the transport direction C1.

As shown in FIG. 4, the heating unit 20 is arranged on both sides of the lateral direction L1 perpendicular to the transport direction C1 of the workpiece W, and is arranged along the transport direction C1, and includes a heating element 20A that performs high-frequency induction heating of the workpiece W. The heating element 20A is, for example, composed of a heating coil. The heating unit 20 can adopt any configuration as long as it can heat the workpiece W transported by the transport section 10.

As shown in Figures 2 to 5, the work support 30 moves in the conveying direction C1 by the conveying section 10, supports the work W, and is rotatable about the central axis X1 in a vertical direction V1 perpendicular to the conveying direction C1 and the horizontal direction L1, and is movable up and down in the vertical direction V1.
Specifically, the work support 30 includes a lower support 30A that supports the underside of the work W and is rotatable about the vertical direction V1 as a central axis X1 and movable up and down in the vertical direction V1, an upper support 30B that supports the upper side of the work W and is rotatable about the vertical direction V1 as a central axis X1 and movable up and down in the vertical direction V1, and a load increasing section 30C that increases the supporting load on the work W.

The lower support body 30A includes, for example, a lower chuck portion 30A1 that supports the lower side of the workpiece W with the vertical direction V1 as its central axis X1, a lower shaft portion 30A2 that is fixed to the lower chuck portion 30A1 and has the vertical direction V1 as its central axis X1 and long axis and the horizontal direction L1 and the transport direction C1 as its short axis, and a lower drive mechanism 30A3 that rotates the lower chuck portion 30A1 and the lower shaft portion 30A2 with the vertical direction V1 as its central axis X1 and allows the lower chuck portion 30A1 and the lower shaft portion 30A2 to move up and down in the vertical direction V1.

The material of the lower surface chuck portion 30A1 is not particularly limited as long as it is a material that does not deform or otherwise change shape due to the high-frequency induction heating. The material of the lower surface chuck portion 30A1 is, for example, made of steel. The shape of the lower surface chuck portion 30A1 is not particularly limited as long as the workpiece W can be placed on it. The shape of the lower surface chuck portion 30A1 is, for example, disk-shaped.

The material of the lower shaft portion 30A2 is not particularly limited as long as it is a material that does not deform or otherwise change shape due to the high-frequency induction heating. The material of the lower shaft portion 30A2 is, for example, steel. The shape of the lower shaft portion 30A2 is not particularly limited as long as it can rotate the lower chuck portion 30A1 by the drive mechanism 30A3 around the vertical direction V1 as the central axis X1 and can be moved up and down in the vertical direction V1. The shape of the lower shaft portion 30A2 is, for example, conical.

The lower surface driving mechanism 30A3 is not particularly limited as long as it rotates the lower surface chuck portion 30A1 and the lower surface shaft portion 30A2 with the vertical direction V1 as the central axis X1 and the lower surface chuck portion 30A1 and the lower surface shaft portion 30A2 can move up and down in the vertical direction V1. The driving mechanism 30A3 is composed of, for example, a rotation mechanism (not shown) that rotates the lower surface shaft portion 30A2 (and the lower surface chuck portion 31A1), and a piston mechanism (not shown) that moves the lower surface shaft portion 30A2 (and the lower surface chuck portion 31A1) up and down.

The upper surface support 30B includes, for example, an upper surface chuck portion 30B1 that supports the upper surface side of the workpiece W with the vertical direction V1 as its central axis X1, an upper surface shaft portion 30B2 that is fixed to the upper surface chuck portion 30B1 and has the vertical direction V1 as its central axis X1 and long axis and the horizontal direction L1 and the transport direction C1 as its short axis, and an upper surface drive mechanism 30B3 that rotates the upper surface chuck portion 30B1 and the lower surface shaft portion 30B2 with the vertical direction V1 as its central axis X1 and is movable up and down in the vertical direction V1.

The material of the upper surface chuck portion 30B1 is not particularly limited as long as it is a material that does not deform or otherwise change shape due to the high-frequency induction heating. The material of the upper surface chuck portion 30B1 is, for example, made of steel. Furthermore, the shape of the upper surface chuck portion 30B1 is not particularly limited as long as it is possible to increase the supporting load of the workpiece W. The shape of the upper surface chuck portion 30B1 is, for example, disc-shaped.

The material of the upper surface shaft portion 30B2 is not particularly limited as long as it is a material that does not deform or otherwise change shape due to the high-frequency induction heating. The material of the upper surface shaft portion 30B2 is, for example, steel. The shape of the upper surface shaft portion 30B2 is also not particularly limited as long as it can rotate the upper surface chuck portion 30B1 by the upper surface drive mechanism 30B3 around the vertical direction V1 as the central axis X1 and can be moved up and down in the vertical direction V1. The shape of the upper surface shaft portion 30A2 is, for example, conical.

The upper surface driving mechanism 30B3 is not particularly limited as long as it rotates the upper surface chuck portion 30B1 and the upper surface shaft portion 30B2 with the vertical direction V1 as the central axis X1 and the upper surface chuck portion 30B1 and the upper surface shaft portion 30B2 can move up and down in the vertical direction V1. For example, the upper portion of the upper surface shaft portion 30B2 of the upper surface driving mechanism 30A3 is embedded in the first recess 30C2a of the upper plate 30C2 (described later) so as to be rotatable with the vertical direction V1 as the central axis X1, and a spring member 30B2a is disposed between the bottom surface of the first recess 30C2a and the upper surface of the upper surface shaft portion 30B2.

The load increasing section 30C includes a lower plate 30C1 that fixes the lower support 30A so that the lower chuck section 30A1 and the lower shaft section 30A2 can rotate around the vertical direction V1 as the central axis X1 and move up and down in the vertical direction V1, an upper plate 30C2 that fixes the upper support 30B so that the upper chuck section 30B1 and the upper shaft section 30B2 can rotate around the vertical direction V1 as the central axis X1 and move up and down in the vertical direction V1, and variable sections 30C3, 30C3 that are fixed to both the lower plate 30C1 and the upper plate 30C2 so that the distance in the vertical direction V1 between the lower plate 30C1 and the upper plate 30C2 can be changed.

The material of the lower plate 30C1 and the upper plate 30C2 is not particularly limited as long as it is a material that does not deform or otherwise change shape due to the high-frequency induction heating. The material of the lower plate 30C1 is, for example, made of steel. The shapes of the lower plate 30C1 and the upper plate 30C2 are also not particularly limited as long as the variable parts 30C3, 30C3 can be fixed so that the distance in the vertical direction V1 between the lower plate 30C1 and the upper plate 30C2 can be changed. The shapes of the lower plate 30C1 and the upper plate 30C2 are, for example, made of rectangular flat plates.

The variable parts 30C3, 30C3 are, for example, composed of a first variable member 30C3a, 30C3a, the other end of which is fixed to the lower plate 30C1 so that the recesses R1, R1 provided at one end are opened along the vertical direction V1 and toward the vertical direction V1, and a second variable member 30C3b, 30C3b, one end of which engages with the recesses R1, R1 and the other end of which is fixed to the upper plate 30C2 so that the distance in the vertical direction V1 between the lower plate 30C1 and the upper plate 30C2 can be changed.

The material of the first variable member 30C3a, 30C3a and the second variable member 30C3b, 30C3b is not particularly limited as long as it is a material that does not deform or the like due to the high-frequency induction heating. The material of the first variable member 30C3a, 30C3a and the second variable member 30C3b, 30C3b is, for example, made of steel. The shape of the first variable member 30C3a, 30C3a and the second variable member 30C3b, 30C3b is not particularly limited as long as it is configured so that the distance in the vertical direction V1 between the lower plate 30C1 and the upper plate 30C2 can be changed. The shape of the first variable member 30C3a, 30C3a and the second variable member 30C3b, 30C3b is, for example, made of a rod-shaped member.

The high-frequency induction heating device 1 according to this embodiment is equipped with the load increasing section 30C described above, and therefore increases the support load on the workpiece W. That is, in this embodiment, the load of the upper plate 30C2 can be increased as the support load on the workpiece W (see arrow U in FIG. 6). Therefore, when the workpiece W is rotated and high-frequency induction heated, the roundness, etc. of the workpiece can be improved.

Specifically, as shown in FIG. 1, the high-frequency induction heating device 1 according to this embodiment is configured such that the work supports 30 are attached in a plurality of positions spaced apart from one another in the conveying direction C1 so as to be rotatable and movable up and down, and the conveying unit 10 moves in the conveying direction C1. Furthermore, the high-frequency induction heating device 1 according to this embodiment is configured such that the conveying unit 10 is arranged in a loop shape and moves in a circular motion along the loop. Note that the configuration of the high-frequency induction heating device 1 according to this embodiment is not particularly limited as long as it can move in a circular motion along the loop, and therefore a description thereof will be omitted.

The high-frequency induction heating device 1 according to this embodiment has, in the direction of circular movement along the loop (i.e., the transport direction C1), a workpiece placement area 100, a high-frequency induction heating area (heating unit) 200, a cooling area (cooling unit) 300, a workpiece removal area 400, and a workpiece support return area 500.

In the workpiece placement area 100, the workpiece W is attached to the workpiece support 30. The attachment method is to raise the upper surface chuck portion 30B1 of the workpiece support 30 (see FIG. 5) relative to the workpiece support 30 (see FIG. 4) that has been returned through the workpiece support return area 500 and entered the workpiece placement area 100. The workpiece W1 is set between the raised upper surface chuck portion 30B1 and the lower surface chuck portion 30A1 (see FIG. 6). Next, with the workpiece W1 set, the workpiece support 30 enters the high-frequency induction heating area (heating unit) 200, and the workpiece W1 is high-frequency induction heated by the heating body (heating coil) 20A (see FIG. 7). Next, the high-frequency induction heated workpiece W1 enters the cooling area (cooling unit) 300, and the workpiece W1 is cooled by the cooling body (cooling jacket 40A) (see FIG. 8). Next, the cooled workpiece W1 enters the workpiece removal area 400, and the upper surface chuck part 30B1 is raised to remove the cooled workpiece W1 from the workpiece support 30. The workpiece support 30 from which the workpiece W1 has been removed passes through the workpiece support part return area 500 and is again moved in a circle to the workpiece installation area 100.

That is, the high-frequency induction heating device 1 according to this embodiment further includes a cooling unit 40 for cooling the workpiece, the transport section 10 is arranged in a loop and moves circularly along the loop, the workpiece support 30 passes through the heating unit 20 and then passes through the cooling unit 30, and the heating unit 20 and the cooling unit 40 are part of the transport section that moves circularly.
Therefore, the high-frequency induction heating device 1 according to this embodiment can also be applied to tempering treatment in high-frequency induction heating.

FIG. 9 is a schematic side view of the preferred work support 30 of FIG.
As shown in FIG. 9, it is preferable that the load increasing section 30C further includes a weight installation section 30D attached to the upper support 30B.
In the high frequency induction heating device 1 according to this embodiment, the weight installation portion 30D is the upper surface 30D of the upper plate 30C2 of the upper surface support body 30B.

As shown in Fig. 9, by placing a weight WB on the weight installation section 30D, the load supported on the workpiece W can be increased (see arrow U in Fig. 9). This can further improve the roundness, etc. of the workpiece W when the workpiece W is rotated and subjected to high-frequency induction heating.
In addition, when the weight WB is placed on the upper surface 30D of the upper plate 30C2, it is preferable to provide a fixing means for fixing the weight WB to the upper surface 30D so that the weight WB does not fall.

The above-described embodiments are examples of the present invention, and the present invention is not limited to these embodiments. For example, the present invention also includes the above-described embodiments in which some components or steps are added, deleted, or modified.

1: High frequency induction heating device 10: Transport section 20: Heating unit 30: Work support

Claims (2)

A conveying unit arranged along a conveying direction for conveying a disk-shaped workpiece;
A heating unit is provided on both sides of the workpiece in a lateral direction perpendicular to the transport direction and along the transport direction, the heating unit including a heating body for high-frequency induction heating the workpiece;
A cooling unit for cooling the workpiece;
A work support body that is moved in the transport direction by the transport unit, supports the work, and is rotatable about a central axis in a vertical direction perpendicular to the transport direction and the horizontal direction, and is movable up and down in the vertical direction;
The work support includes a lower support that supports a lower surface side of the work and is rotatable and vertically movable, an upper support that supports an upper surface side of the work and is rotatable and vertically movable, and a load increasing section that increases the support load on the work ,
The transport unit is disposed in a loop shape and moves circulating along the loop shape,
The work support is configured to pass through the heating unit and then the cooling unit,
The heating unit and the cooling unit are part of the circulating transport section of the high-frequency induction heating device. The high-frequency induction heating device according to claim 1, wherein the load increasing section has a weight installation section attached to the upper support.

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