High-frequency hardening device

Abstract

To provide a high-frequency hardening device capable of decreasing the manufacture man hours of the device.SOLUTION: A high-frequency hardening device has cooling water distribution means 26 which distributes cooling water to a disk transformer 22, the distribution means 26 is provided with a plurality of waterways 28. The distribution means 26 is made of metal, and provided with: a second cooling water supply pipe 34 to which the cooling water is supplied from a first cooling water pipe 24 at least on a supply side 30 for cooling water; a cooling water distribution pipe 36 on a distribution side 32 for cooling water; a cooling water recovery pipe for recovering cooling water having cooled the disk transformer 22 on the distribution side 32 for cooling water: and a second cooling water discharge pipe 40 connected to a waterway communicating with the cooling water recovery pipe on the supply side 30 for cooling water. The cooling water is discharged from the second cooling water discharge pipe 40 through a first cooling water discharge pipe 46, and the total of the numbers of the secondary cooling water supply pipes 34 and the second cooling water discharge pipes 40 is equal to or less than the total of the numbers of the cooling water distribution pipes 36 and the cooling water recovery pipes.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an induction hardening device. [Background technology]

[0002] When a workpiece is hardened by induction, the disk transformer generates heat during the high-frequency processing. To cool it, cooling water is supplied, but the cooling water is supplied through a cooling water distribution means. The hoses that supply the cooling water from the supply source to the distribution means and the hoses that supply the cooling water from the distribution means to the disk transformer are interconnected through the distribution means, and the same number of hoses are supplied to each.

[0003] In this way, conventionally, water supplied from the cooling water source was directly supplied to the disc transformer via a distribution means. In other words, one hose supplying cooling water from the source corresponded to one hose distributing it to the disc transformer, forming a pair, with the same number of supply hoses and distribution hoses. Eight to ten hoses were connected to each disc transformer, and since four to five disc transformers were installed in one device, 40 to 50 hoses were required for supply and distribution, for a total of 80 to 100 supply hoses and distribution hoses, which required a large installation space and a considerable amount of labor to manufacture the device. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-24466 Summary of the Invention [Problem to be solved by the invention]

[0005] According to Patent Document 1, multiple hoses for supplying or discharging coolant are connected to the disk transformer, and multiple hoses for supplying or discharging coolant are also connected to the high-frequency induction heating coil body, and there is no concern about connecting many hoses to both the supply side and the discharge side.

[0006] The present invention provides an induction hardening device that can reduce the installation space and the number of steps required to manufacture the device by reducing the number of hoses. [Means for solving the problem]

[0007] An embodiment for solving the above-mentioned problems is an induction hardening apparatus for hardening a workpiece, which includes at least a heating coil for hardening the workpiece, a disk transformer for supplying a transformed current to the heating coil, and a cooling water distribution means for receiving a supply of cooling water from a cooling water supply source and distributing the cooling water to the disk transformer, the distribution means being provided with a plurality of water flow paths.

[0008] According to this aspect, the induction hardening device for hardening a workpiece includes at least a heating coil for hardening the workpiece, a disk transformer for supplying transformed current to the heating coil, and a cooling water distribution means for receiving cooling water from a cooling water supply source and distributing the cooling water to the disk transformer, and since the distribution means is an induction hardening device having a plurality of water flow channels, providing a plurality of water flow channels allows the cooling water to be supplied from a single supply source hose to a plurality of hoses via a plurality of water flow channels, thereby reducing the number of hoses on the supply side.

[0009] In this embodiment, the distribution means has a supply side where cooling water is supplied from a supply source, and a distribution side on the back side of the distribution means that distributes cooling water to the disk transformer, and the flow channel connects the supply side and the distribution side, which is an induction hardening device.

[0010] According to this embodiment, the distribution means has a supply side where cooling water is supplied from a supply source, and a distribution side on the back side of the distribution means that distributes cooling water to the disc transformer, and the water flow channel is an induction hardening device that connects the supply side and the distribution side, so the supply side and the distribution side can be separated, and it is not necessarily necessary to install a supply side hose and a distribution side hose as a pair, and one water flow channel on the supply side can be separated into multiple channels on the distribution side.

[0011] In this embodiment, the distribution means is made of metal, and at least a second cooling water supply pipe to which cooling water is supplied from a first cooling water supply pipe is provided on the cooling water supply side, a cooling water moisture pipe is provided on the cooling water distribution side, and a cooling water recovery pipe for recovering the cooling water that has cooled the disk transformer is further provided on the cooling water distribution side, and a second cooling water discharge pipe connected to a flow path that communicates with the cooling water recovery pipe is provided on the cooling water supply side, and cooling water is discharged from the second cooling water discharge pipe through the first cooling water discharge pipe, making this an induction hardening apparatus in which the total number of second cooling water supply pipes and second cooling water discharge pipes is half or less of the total number of cooling water moisture pipes and cooling water recovery pipes.

[0012] According to this embodiment, the distribution means is made of metal, and at least a second cooling water supply pipe to which cooling water is supplied from a first cooling water supply pipe is provided on the cooling water supply side, a cooling water moisture pipe is provided on the cooling water distribution side, and a cooling water recovery pipe for recovering the cooling water that has cooled the disk transformer is further provided on the cooling water distribution side, and a second cooling water discharge pipe connected to a water flow path that communicates with the cooling water recovery pipe is provided on the cooling water supply side, and cooling water is discharged from the second cooling water discharge pipe through the first cooling water discharge pipe, and this is an induction hardening apparatus in which the total number of the second cooling water supply pipes and the second cooling water discharge pipes is half or less of the total number of the cooling water moisture pipes and the cooling water recovery pipes, so that at least the number of hoses on the cooling water supply side is half of that on the cooling water distribution side, thereby making it possible to reduce the space required for the apparatus and the man-hours required for assembling the apparatus.

[0013] In this embodiment, the distribution means is provided with one second cooling water supply pipe and one second cooling water discharge pipe for each disk transformer, a first water flow passage communicating with the second cooling water supply pipe is connected to the plurality of cooling water pipes, and a plurality of cooling water recovery pipes for recovering the cooling water discharged from the disk transformer side are connected to the second cooling water discharge pipe by a second water flow passage.

[0014] According to this embodiment, the distribution means is provided with one second cooling water supply pipe and one second cooling water discharge pipe for each disk transformer, a first flow channel communicating with the second cooling water supply pipe is connected to the plurality of cooling water pipes, and a plurality of cooling water recovery pipes for recovering cooling water discharged from the disk transformer side are connected to the second cooling water discharge pipe by a second flow channel in this induction hardening apparatus.Therefore, there is only one second cooling water supply pipe and one second cooling water discharge pipe for each disk transformer, and only one hose is connected thereto, which makes it possible to significantly reduce the space required for the apparatus and the man-hours required for assembling the apparatus. [Effects of the Invention]

[0015] According to the induction hardening device of this embodiment, since it has a cooling water distribution means and a water flow channel is provided within the distribution means, the number of hoses on the supply side can be reduced, which makes it possible to reduce the installation space and the number of steps required to manufacture the device. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a schematic diagram of an induction hardening device according to the present invention. [Figure 2] 1 is a perspective view showing a disk transformer and a heating coil body in an induction hardening device according to the present invention. FIG. [Figure 3] FIG. 2 is a perspective view showing a distribution means in the induction hardening device of the present invention. [Figure 4] 1 is a perspective view of the induction hardening device of the present invention, seen from the distribution side of the distribution means. FIG. [Figure 5]1 is a cross-sectional perspective view showing a water flow channel of a distribution means in an induction hardening device of the present invention, as viewed from the distribution side. FIG. [Figure 6] 1 is a perspective view of a distribution means in which the second cooling water supply pipe and the second cooling water discharge pipe are combined into one pipe in the induction hardening apparatus of the present invention. FIG. [Figure 7] 1 is an exploded perspective view of a distribution means when one second cooling water supply pipe and one second cooling water discharge pipe are provided in the induction hardening apparatus of the present invention, as viewed from the distribution side. FIG.

[0017] The following description will be given with reference to the drawings. As shown in FIG. 1, the induction hardening device 1 (high frequency heating device) of the present invention has a disk transformer 22, an induction heating coil body 6, and a high frequency power source (not shown).

[0018] The high frequency power supply has a high frequency oscillator, converts AC power supplied from a commercial power supply into a high frequency power, and outputs the converted power to the disk transformer 22 side.

[0019] The disk transformer 22 has a primary winding on the high-frequency power supply side and a secondary winding on the induction heating coil body 6 side. The primary winding and the secondary winding are made of tubular wire members made of a good conductor such as copper or a copper alloy.

[0020] As shown in FIG. 2, the induction heating coil body 6 includes a heating coil 7, spacers 8a to 8c, side plates 9 and 10, and cooling jackets 11 and 12.

[0021] The heating coil 7 is made of a tubular, wire-like member made of a good conductor such as copper or a copper alloy, and is connected to the secondary winding of the disk transformer 22. The heating coil 7 has a semi-open, curved shape that allows it to approach and face approximately half of the entire circumference of the pins P1 to P4 of the crankshaft W shown in FIG. 1, which is the object to be induction heated. In other words, the heating coil 7 can move toward and away from the pins P1 to P4 in the radial direction of the pins P1 to P4. The heating coil 7 is made of a hollow conductor, and during induction heating, a coolant is circulated and supplied into the heating coil 7 from a coolant supply source (not shown).

[0022] As shown in Figure 2, the side plates 9 and 10 are made of a metal material that is not easily affected by electromagnetic induction, and are arranged on both sides of the heating coil 7 to sandwich and secure the heating coil 7. The side plates 9 and 10 are provided with semicircular recesses 9a and 10a. The recesses 9a and 10a form a workpiece placement area 13 between the side plates 9 and 10 that can accommodate the pin portions P1 to P4.

[0023] The spacer 8 is made of a material such as ceramic that is not affected by electromagnetic induction, and is fixed to the side plates 9 and 10 with screws.

[0024] The cooling jackets 11 and 12 have a large number of injection holes. The cooling jackets 11 and 12 are arranged below the side plates 9 and 10 and on both sides of the workpiece placement area 13. When cooling water is supplied to the cooling jackets 11 and 12 from a cooling water supply source (not shown), the cooling water can be injected from the injection holes toward the workpiece placement area 13.

[0025] Cooling water is also supplied to the disk transformer to prevent it from overheating. The cooling water supplied to the disk transformer and the cooling jacket is supplied from a cooling water supply source (not shown). As shown in FIG. 1, the supplied cooling water passes through a first cooling water supply pipe 24 and flows to a distribution means (distributor) 26. The distribution means 26 is provided with a plurality of water flow paths 28, 29.

[0026] The distribution means 26 is made of metal, and plated iron or the like can be used. As shown in Fig. 3, the distribution means 26 has a supply side 30 to which cooling water is supplied from a supply source, and a distribution side 32 on the back side of the distribution means 26 that distributes cooling water to the disc transformer 22. Fig. 5 is a cross-sectional perspective view showing the water flow channels 28, 29 of the distribution means 26, as seen from the distribution side 32. As shown in Fig. 5, the water flow channel 28 connects the supply side 30 and the distribution side 32.

[0027] 1, 3, 4, and 5, a second cooling water supply pipe 34 is provided at least on the cooling water supply side 30 of the distribution means 26, a cooling water moisture pipe 36 is provided on the cooling water distribution side 32, and a cooling water recovery pipe 38 is provided on the cooling water distribution side 32 for recovering the cooling water that has cooled the disc transformer 22. A second cooling water discharge pipe 40 is provided on the cooling water supply side 30, connected to the flow path 28 that communicates with the cooling water recovery pipe 38, and the number of second cooling water supply pipes 34 and second cooling water discharge pipes 40 is half or less of the total number of cooling water moisture pipes 36 and cooling water recovery pipes 38.

[0028] As shown in Fig. 5, the water flow channel 28 is connected to a second cooling water supply pipe 34, and the water flow channel 29 is connected to a second cooling water discharge pipe 40. As shown in Figs. 1 and 5, cooling water supplied from a supply source (not shown) passes through the first cooling water supply pipe 24, enters the second cooling water supply pipe 34, and then enters the water flow channel 28 of the distribution means 26. The cooling water then flows out from the distribution side 32 of the distribution means 26 and enters the disc transformer 22 and the cooling jackets 11 and 12 of the heating coil 7. The cooling water that has cooled the disc transformer 22 and the cooling jackets 11 and 12 is collected in the cooling water collection pipe 38, passes through the water flow channel 29, enters the second cooling water discharge pipe 40, and is then discharged by a hose 48 from the first cooling water discharge pipe 46 to a discharge destination (not shown).

[0029] 7 is an exploded perspective view of the distribution means 26 of another embodiment, as seen from the distribution side 32. The distribution means 26 has two separate water flow channels: a first water flow channel 42 that connects one second cooling water supply pipe 34 and multiple cooling water pipes 36, and a second water flow channel 44 that connects multiple cooling water recovery pipes 38 and one second cooling water discharge pipe 40.

[0030] That is, as shown in FIG. 7, one second cooling water supply pipe 34 and one second cooling water discharge pipe 40 may be provided in the distribution means 26 for each disc transformer 22, a first water flow passage 42 communicating with the second cooling water supply pipe 34 may be connected to the plurality of cooling water pipes 36, and a plurality of cooling water recovery pipes 38 for recovering the cooling water discharged from the disc transformer 22 side may be connected to the second cooling water discharge pipe 40 by a second water flow passage 44.

[0031] Cooling water supplied from a supply source (not shown) passes through the first cooling water supply pipe 24 and a hose 48 into the second cooling water supply pipe 34. From the second cooling water supply pipe 34, it passes through the first flow water channel 42, is distributed to multiple cooling water pipes 36, and enters the disc transformer 22 and the cooling jackets 11 and 12 of the heating coil 7. The cooling water that has cooled the disc transformer 22 and the cooling jackets 11 and 12 is collected in multiple cooling water recovery pipes 38, and the combined water passes through the second flow water channel 44 into the second cooling water discharge pipe 40, and is then discharged from the first cooling water discharge pipe 46 by the hose 48 to a discharge destination (not shown).

[0032] In this case, at least two hoses, one connecting the second cooling water supply pipe 34 and the other connecting the second cooling water discharge pipe 40, are sufficient for one distribution means 26 on the supply side 30, thereby significantly reducing the number of hoses. [Explanation of symbols]

[0033] 1. High-frequency hardening equipment 6. Induction heating coil body 7 Heating Coil 11, 12 Cooling jacket 22 disc transformer 24 First cooling water supply pipe 26 Means of distribution 28 Waterway 30 Supply Side 32 Distribution side 34 Second cooling water supply pipe 36 Cooling water piping 38 Cooling water recovery pipe 40 Second cooling water discharge pipe 42 First waterway 44 Second waterway 46 First cooling water discharge pipe

Claims

1. An induction hardening device for hardening a workpiece, The cooling water supply system includes at least a heating coil for hardening a workpiece, a disk transformer for supplying a transformed current to the heating coil, and a cooling water distribution means for receiving a supply of cooling water from a cooling water supply source and distributing the cooling water to the disk transformer, The induction hardening apparatus is characterized in that the distribution means is provided with a plurality of water flow paths.

2. 2. The induction hardening apparatus according to claim 1, wherein the distribution means has a supply side to which cooling water is supplied from a supply source and a distribution side on the back side of the distribution means for distributing cooling water to the disk transformer, and the water flow path connects the supply side and the distribution side.

3. 2. The induction hardening apparatus according to claim 1, wherein the distribution means is made of metal, and at least a second cooling water supply pipe to which cooling water is supplied from a first cooling water supply pipe is provided on a cooling water supply side, a cooling water moisture pipe is provided on a cooling water distribution side, and a cooling water recovery pipe for recovering the cooling water which has cooled the disk transformer is further provided on the cooling water distribution side, and a second cooling water discharge pipe connected to a water flow path which communicates with the cooling water recovery pipe is provided on the cooling water supply side, and the cooling water is discharged from the second cooling water discharge pipe through the first cooling water discharge pipe, and the total number of the second cooling water supply pipes and the second cooling water discharge pipes is half or less of the total number of the cooling water moisture pipes and the cooling water recovery pipes.

4. For each of the disc transformers, one second cooling water supply pipe and one second cooling water discharge pipe are provided in the distribution means, and a first flow channel communicating with the second cooling water supply pipe is connected to the plurality of cooling water pipes, and a plurality of cooling water recovery pipes for recovering the cooling water discharged from the disc transformer side and the second cooling water discharge pipe are connected to the first flow channel.

4. The induction hardening apparatus according to claim 3, wherein the two flow channels are connected to each other by a second flow channel.

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