JP2550165Y2 - Induction hardening equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction hardening device for a work having two hardened surfaces separated from each other.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to the drawings. For example, a case where hardened layers 803 and 804 are formed on a stepped cylindrical track roller (used for a traveling system of a bulldozer) 80 whose longitudinal section is shown in FIG. 14 will be described. The track roller 80 is a rotationally symmetric body having the axis 802 as a rotation axis, and a pair of large-diameter portions 814 and 82 from both ends in the axial direction toward the center.
4, a pair of middle diameter portions 812 and 822 and a small diameter portion 801 are formed. A tapered portion 811 is formed between the small diameter portion 801 and the middle diameter portion 812, and an R portion 813 is formed between the middle diameter portion 812 and the large diameter portion 814. Also, the small diameter part 801 and the middle diameter part
822 and a tapered section 821.
824 is formed with an R portion 823.

[0003] A hardened layer 803 is formed on the first hardened surface 810 which is a surface extending over the tapered portion 811, the middle diameter portion 812, and the R portion 813, and the tapered portion 821 and the middle diameter portion 82 are formed.
2, and a second hardened surface 82 which is a surface extending over the R portion 823.
At 0, a hardened layer 804 is formed.

In order to form such hardened layers 803, 804 on the track roller 80, conventionally, the following means has been employed. That is, first, a semi-open saddle-type high-frequency heating coil (hereinafter, simply referred to as a heating coil) 10 shown in FIG. 11 is prepared.

The heating coil 10 includes a power supply conductor 101,
102 and a coil piece 10A and a coil piece 10B connected in series between the conductors 101 and 102. The coil piece 10A is provided with a heating conductor 11 disposed so as to approach and oppose the R portion 813 of the track roller 80, and a heating conductor 11 which is disposed so as to approach and face the vicinity of the tapered portion 811 of the middle diameter portion 812.
A heating conductor 12 parallel to 11 and a heating conductor 11, 12 arranged in the direction of the axis 802 of the track roller 80, that is, in the direction of arrow P.
And a heating conductor 14 arranged in the direction of the arrow P and connected to the other end of the heating conductor 12. Each of the heating conductors 11 and 12 has a substantially 1/4 arc shape and is formed in the circumferential direction of the track roller 80, that is, in the direction of arrow Q.

As shown in FIG. 12, the heating conductor 11 has an R portion facing surface 11a having a curved cross section corresponding to the R portion 813, and covers the surface except for the R portion facing surface 11a. The magnetic core 11b is mounted as described above. Also, the heating conductor
12 has a square or rectangular cross section, and has a medium diameter portion 81.
The core 12b is mounted so as to cover the surface excluding the medium-diameter portion facing surface 12a facing 2. The cross-sectional shapes of the heating conductors 13 and 14 are substantially the same as those of the heating conductor 12, and a core is mounted. Reference numeral 103 denotes hollow portions of the heating conductors 11 and 12, and these hollow portions are flow paths for the cooling liquid of the heating coil 10.

The coil piece 10B has the same structure as the coil piece 10A, that is, has the same heating conductors 15 to 18 as the heating conductors 11 to 14, respectively, and the heating conductor 17 is arranged so as to face the heating conductor 13. Has been established. As shown in FIG. 13, the heating conductor 15 has an R-part facing surface 15a and a core 15b. Heating conductor 16 has a medium diameter portion facing surface
16a are formed, and the core 16b is mounted. The heating conductor 14 and the heating conductor 18 are connected by a connection conductor 19.

Next, as shown in FIG. 14, both ends of a horizontally disposed track roller 80 are supported by centers 91 and 92, and the track roller 80 is rotated by a rotary driving device (not shown).
The heating coil 10 is arranged close to the middle diameter portion 812 of the track roller 80 while rotating around the
813, the heating conductor 12 is disposed so as to face the vicinity of the tapered portion 811 of the middle diameter portion 812, respectively. Thereafter, a high-frequency current is supplied to the heating coil 10 for a predetermined time, and then the heating coil 10 is raised by a heating coil lifting device (not shown). Next, in order to inject the cooling liquid to the track roller 80, the annular jacket 60 provided with a large number of cooling liquid injection holes 61 on the inner surface is moved in the direction of arrow S and arranged so as to face the middle diameter portion 812. Then, when the coolant is injected from the coolant injection hole 61 to the track roller 80, the tapered portion 811
812 and a hardened layer 803 over the R portion 813 are formed. Then, the jacket 60 is moved in the direction opposite to the arrow S to return to the original position.

Next, track rollers by the centers 91 and 92
After releasing the support of the track roller 80 and arranging the track roller 80 right and left, the track roller 80 is horizontally supported again at the centers 91 and 92. Then, similarly to the case where the hardened layer 803 is formed on the tapered portion 811, the middle diameter portion 812, and the R portion 813, the heating coil 10 and the jacket 60 are used, and the tapered portion 821, the middle diameter portion 822, and the R portion are used. A hardened layer 804 is formed on 823, and the hardening of the track roller 80 is completed.

[0010]

When the hardened layers 803 and 804 are formed on the track roller 80 as described above, there are the following problems. That is, first, when forming the hardened layers 803, 804, a device for moving the jacket 60 to the position facing the surface to be quenched each time and returning to the original position is necessary. Structure becomes complicated.
After the formation of the hardened layer 803, the track rollers must be reversed left and right in order to form the hardened layer 804. Therefore, it takes time to change the position.

The present invention has been made in view of the above circumstances, and when quenching a workpiece having two first and second hardened surfaces separated from each other, a coolant is applied to the hardened surface. It is not necessary to move the jacket to be sprayed, and induction hardening can harden the next surface to be quenched without quenching one surface to be quenched and repositioning the work left and right. It is intended to provide a device.

[0012]

In order to solve the above problems, the induction hardening device of the present invention is located at a position remote from the work.
Induction hardening equipment for quenching two hardened surfaces
And a high-frequency heating coil for heating one hardened surface
High-frequency heating coil for heating the hardened surface of
And a jacket for spraying the cooling liquid provided between the surfaces.
And the jacket is divided by a partition
It is opened diagonally in the coolant passage and it is
It is characterized by having a cooling liquid injection hole for injecting the cooling liquid respectively.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. 1 to 10 are views for explaining the present embodiment, FIG. 1 is an explanatory view showing a state where a track roller is cooled, FIG. 2 is an explanatory view showing a state where a track roller is heated with high frequency, 3 is a front view of the jacket, and FIG.
5 is a schematic perspective view of the heating coil, FIG. 6 is a cross-sectional view of FIG. 5 taken along line BB, FIG. 7 is a cross-sectional view of FIG. 5 taken along line CC, FIG. FIG. 9 is an explanatory view showing a state where two hardened surfaces of the track roller are simultaneously cooled, FIG. 9 is an explanatory view showing a state where two track roller portions are simultaneously heated, and FIG.
FIG. 3 is a schematic perspective view of a heating coil for simultaneously heating two hardened surfaces. Note that the same components as those described in the related art are denoted by the same reference numerals. As a work to be hardened by the induction hardening apparatus of the present embodiment, a track roller 80 similar to that described in the conventional induction hardening apparatus is used.

The induction hardening apparatus according to the present embodiment includes a tapered portion 811, a medium diameter portion 812,
One quenched surface which is the surface of the portion 813 (hereinafter referred to as a first quenched surface)
First heating coil for heating the Irimen hereinafter) 810 1
0, tapered portion 821, middle diameter portion 822, and R portion 8
The other quenched surface (hereinafter referred to as a second quenched surface
A second heating coil 20 for heating) 820 of the first
The basic configuration is that a cooling liquid jetting jacket 30 provided between the quenched surface 810 and the second quenched surface 820 is provided.

More specifically, as shown in FIG. 5, the heating coil 10 is the same as the heating coil described in the prior art.
It has the same structure as 10. The heating coil 20 has a configuration substantially similar to the heating coil 10 when viewed schematically, and includes power supply conductors 101 and 102 of the heating coil 10 and a coil piece 10A.
, 10B and power supply conductors 201, 202 and coil pieces 20A, 20B, respectively.

The coil piece 20A is a heating conductor of the coil piece 10A.
Heating conductors 21 to 24 are provided at positions corresponding to 11 to 14, respectively. As shown in FIG. 6, the heating conductor 21 is the same as the heating conductor 12, and the heating conductor 22 is the same as the heating conductor 11, respectively. Having. That is, the heating conductor 22 is connected to the R portion 82 of the second hardened surface 820.
3 has an R-part facing surface 22a so that it can be heated.
The core 22b is mounted, and the heating conductor 21 has a medium diameter portion corresponding surface 21a so as to heat the vicinity of the tapered portion 821 of the medium diameter portion 822 of the second quenched surface 820. Is installed.

The coil piece 20B has the same structure as the coil piece 20A, and the same heating conductors 25 to 24 as the heating conductors 21 to 24, respectively.
The heating conductor 27 is provided so as to face the heating conductor 23. Then, as shown in FIG.
Is formed with an R-part facing surface 26a, and a core 26b
Is installed. The heating conductor 25 has a medium-diameter portion facing surface 25a and a core 25b. The heating conductor 24 and the heating conductor 28 are connected by a connection conductor 29.

As shown in FIG. 5, power supply conductors 101, 10
Numeral 2 is connected to output terminals 501, 502 on the secondary side of the transformer 50 via a pair of contacts 41, 41 respectively advanced and retracted by a pair of cylinders 42, 42. Also, the power supply conductor
The transformers 201 and 202 are also connected via a pair of contacts 43, 43 respectively advanced and retracted by a pair of cylinders 44, 44.
Is connected to the secondary side. 51 is a high frequency power supply,
A high frequency current is supplied to the primary side of the transformer 50. Note that 45
Is a first heating coil elevating device for raising and lowering the first heating coil 10, and 46 is a second heating coil elevating device for raising and lowering the second heating coil 20.
It is a heating coil elevating device.

As shown in FIG. 3, the jacket 30 has a side surface.
The visual shape is formed in a U shape, and the first hardened surface 810 is formed.
A predetermined interval is provided between the workpiece 8 and the second
It is arranged so as to straddle 0. And shown in FIG.
As shown in FIG.
Path 31, second coolant passage 32, and both coolant passages 31, 32
Are set up diagonally, and the first hardened surface 810
A first coolant injection hole 35 for injecting coolant, and a second quenched
The second coolant injection holes 36 for injecting coolant into the surface 820
Have. Reference numerals 37 and 38 denote couplers to which pipes (not shown) for supplying a coolant to the first coolant passage 31 and the second coolant passage 32 are connected, respectively.

Next, the operation of this embodiment will be described. As shown in FIG. 2, both ends of a horizontally disposed track roller 80 are supported by centers 91 and 92, and the first heating coil is moved up and down while rotating the track roller 80 around a shaft 802 by a rotation driving device (not shown). First heating coil by device 45
After lowering 10 and disposing it closer to the first hardened surface 810,
By operating the cylinder 42, the contacts 41, 41 are advanced, and the transformer 50 and the first heating coil 10 are connected by the contacts 41, 41.

Then, a high-frequency current is applied to the first heating coil 10 from the high-frequency power supply 51 via the transformer 50 for a predetermined time. Next, the cylinders 42, 42 are operated to operate the contacts 41, 41.
Is retracted to disconnect the connection between the transformer 50 and the first heating coil 10, and the first heating coil 10 is raised by the first heating coil elevating device 45 as shown in FIG. The cooling liquid is supplied to the first cooling liquid passage 31, and the cooling liquid L is injected from the first cooling liquid injection holes 35 to the first quenching surface 810 to be cooled, whereby the first quenching surface 810 is hardened. Tier 80
Form 3.

Next, the cylinder 44 is operated and the transformer 50 and the second heating coil 20 are connected by the contacts 43, 43 in the same manner as in the case of quenching the first quenched surface 810, and the second heating coil After heating the second hardened surface 820 with 20, the jacket
The cooling liquid is supplied to the second cooling liquid passage 32 of the second cooling liquid passage 30, and the cooling liquid L is injected from the second cooling liquid injection hole 36 to the second quenching surface 820 to be cooled. Then, a hardened layer 804 is formed. Thus, the first hardened surface 810 and the second hardened surface
The reason for quenching 820 and 820 separately is that the capacity of the transformer 50 and the high frequency power supply 51 is reduced in order to reduce the equipment of the induction hardening device.

As described above, in the present embodiment, there is no need to change the left and right positions of the track rollers 80 after quenching the first quenched surface 810, and it is not necessary to move the jacket 30.

If the high-frequency power supply 51 has sufficient capacity, the first quenched surface 810 and the second quenched surface 820
Quenching can be performed simultaneously. That is, the heating coil 10
The power supply conductor 102 shown in FIG. 5 is divided into power supply conductors 102 and 103 as shown in FIG.
2 is connected to the power supply conductor 20 of the heating coil 20 by the connection conductor 52.
1 and connect the power supply conductor 202 to the connection conductor 53.
As a result, the first heating coil 10 and the second heating coil 20 are electrically connected in series and mechanically integrally connected. Reference numeral 47 denotes a coil elevating device that elevates and lowers the first and second heating coils 10 and 20 thus integrally connected.

Then, as shown in FIG. 9, the first heating coil 10 and the second heating coil 10 connected by the coil elevating device 47 are supported while the track roller 80 is supported at the centers 91 and 92 and rotated about the shaft 802. After the heating coil 20 is lowered and arranged so as to approach and face the first quenched surface 810 and the second quenched surface 820, respectively, the contacts 41, 41 are advanced by the cylinder 42 to perform the first heating. The coil 10 and the second heating coil 20 are connected to a transformer 50 so that the first and second hardened surfaces 810, 82
Heat 0 for a predetermined time.

After that, the first heating coil 10 and the second heating coil 20 are raised, and then the coolant is supplied to the first and second coolant passages 31 and 32 of the jacket 30 as shown in FIG. From the first coolant injection hole 35 to the first hardened surface 8.
10 and the coolant L from the second coolant injection hole 36 to the second quenched surface 820, respectively, as shown by black arrows.
By jetting downward , a cured layer 803 and a cured layer 804 are formed. At this time, the two coolant injection holes 35, 3
The cooling liquid L injected from 6 has a symmetric injection direction.
Since the cooling liquids L do not interfere with each other,
Effective. In this case, it is needless to say that the jacket 30 does not need to be moved, but since the first quenched surface 810 and the second large baked surface 820 can be simultaneously quenched,
There is an advantage that the quenching process can be shortened.

[0027]

[Effects of the Invention] As described above, the induction hardening device of the present invention is capable of removing two quenched surfaces located at remote positions of a workpiece.
In the induction hardening device, one hardened surface is added.
Heats the high-frequency heating coil and the other surface to be hardened
Coolant spray between the high-frequency heating coil and the surfaces to be hardened
And a jacket for shooting.
Cut obliquely into the coolant passage divided by the partition
The cooling is performed by injecting a cooling liquid to both hardened surfaces.
It is characterized by having a repellent injection hole .

[0028] In other words, in the induction hardening apparatus of the present invention is, Ja
Packet is a simple structure, mutual coolant from one jacket to any of the baked Irimen the first to be burnt Irimen second HiyakiIrimen
The cooling effect is good because it can be injected without interfering with the air. Ma
The need is not the name of moving the jacket each time of quenching. Sa
Further , since the second heating coil for heating the second quenched surface is provided separately from the first heating coil for heating the first quenched surface, the workpiece is hardened after quenching the first quenched surface. Since it is not necessary to change the left and right positions, the quenching process can be shortened.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a state in which a first quenched surface of a track roller is cooled by an induction hardening device according to an embodiment of the present invention;

FIG. 2 is an explanatory diagram illustrating a state where a first quenched surface of a track roller is subjected to high-frequency heating.

FIG. 3 is a front view of the jacket of the induction hardening apparatus according to the embodiment of the present invention;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a schematic perspective view of a heating coil of the induction hardening apparatus according to one embodiment of the present invention.

FIG. 6 is a sectional view taken along line BB of FIG. 5;

FIG. 7 is a sectional view taken along line CC of FIG. 5;

FIG. 8 is an explanatory view showing a state where the first and second hardened surfaces of the track rollers are simultaneously cooled by the induction hardening device according to another embodiment of the present invention.

FIG. 9 is an explanatory diagram illustrating a state where first and second hardened surfaces of a track roller are simultaneously heated.

FIG. 10 is a schematic perspective view of a heating coil that simultaneously heats first and second hardened surfaces.

FIG. 11 is a schematic perspective view of a heating coil of a conventional induction hardening apparatus.

FIG. 12 is a sectional view taken along line DD in FIG. 11;

FIG. 13 is a sectional view taken along line EE of FIG. 11;

FIG. 14 is an explanatory diagram of a state where a track roller is heated by a conventional induction hardening device.

[Explanation of symbols]

 10 First heating coil 20 Second heating coil 30 Jacket 31 First coolant passage 32 Second coolant passage 35 First coolant injection hole 36 Second coolant injection hole 810 First quenched surface 820 Second baked Entrance

Claims (1)

(57) [Scope of request for utility model registration] 1. A method according to claim 1 , wherein two workpieces are located at separate positions on the workpiece.
In the induction hardening device that hardens the input surface, one of the hardened
A high-frequency heating coil that heats the surface and the other
A high-frequency heating coil that is heated and a cold
And a jacket for injecting rejected liquid, and
The jacket is diagonal to the coolant passage divided by the partition
Cooling liquid is sprayed on both hardened surfaces
An induction hardening device characterized by having a cooling liquid injection hole .