JP2502687Y2 - High frequency heating coil of axial work - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency heating coil (hereinafter, referred to as a heating coil means a high-frequency heating coil) capable of simultaneously heating two shaft-shaped works arranged in parallel.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to the drawings. FIG. 9 is an explanatory view of a conventional heating coil. As shown in FIG. 9, the conventional heating coil 200 is an annular heating conductor 201, 202 for heating two shaft-shaped workpieces W, respectively.
It has. Brazing to a pair of input terminal blocks 205
One end of each of the heating conductors 201 and 202 is brazed to the tip of the substantially L-shaped power supply conductor 210 fixed by 209.
Has been fixed by.

Further, both ends of the connecting conductor 203 are brazed.
The heating conductors 201 and 202 are connected in series because they are fixed to the other ends of the heating conductors 201 and 202 by 207, respectively. Between power conductors 210, 210, and connecting conductor 203
An insulating plate 204 is inserted between the power supply conductor 210 and the power supply conductor 210.

The two works W have a center distance L of the works W and a distance D from the end of the input terminal 205 of the heating coil 200.
Is arranged at the position. Therefore, the distance between the centers of the heating conductors 201 and 202 is also L, and the distance between the center of the heating coils 201 and 202 and the end of the input terminal 205 of the heating coil 200 is also D. Is produced.

[0005]

[Problems to be Solved by the Invention] However, after the heating coil 200 is actually manufactured, the heating coils 201, 202
When the distance L between the centers of and the distance D between the center and the end of the input terminal is actually measured, it is not always guaranteed that they are manufactured as designed. For example, when the designed values of the distances L and D required for the heating coil 200 are 100 mm and 50 mm, respectively, the manufacturing result shows that the distance L has an error of + -0.5 mm and the distance D has an error of + -0.3 mm. Although it may occur, if these errors are not set within + -0.2 mm and 0.1 mm, respectively, the depth of the hardened layer formed on the work W will not be uniform.

In such a case, the brazing 20
After removing 7, 208 and 209, the distances L and D are brazed again so that the error between the distances L and D becomes small, and then the distances L and D are measured to check whether the error is within a predetermined range. To check. As described above, manufacturing the heating coil 200 so that the distances L and D of the heating coil 200 are within a predetermined range requires re-brazing, which is extremely troublesome.

The present invention was devised in view of the above circumstances, and in a heating coil having two annular heating conductors for simultaneously heating two shaft-shaped works arranged in parallel, these two are provided. An object of the present invention is to provide a heating coil in which the distance between the centers of conductors can be easily set to a predetermined value even after the heating coil is assembled.

[0008]

In order to solve the above-mentioned problems, the heating coil of the present invention is a high-frequency heating coil for two shaft-shaped workpieces arranged in parallel, and a left and right power supply conductors and Left and right first connection plates arranged so as to face the power conductors respectively, and left and right second connection plates arranged so as to face the left and right first connection plates through the first insulating plate, respectively. A left and right third connecting plate arranged so as to face the left and right second connecting plates through a second insulating plate, and a first and third connecting plate arranged so as to face the left and right third connecting plate. 4 connecting plate, first connecting piece projecting on the lower side portion of the left first connecting plate, and second connecting piece projecting on the lower side portion of the right first connecting plate so as to face the first connecting piece And third and fourth connecting pieces that are respectively provided on the upper and lower sides of the left second connecting plate, Fifth and sixth connecting pieces projecting from the upper and lower side portions of the second connecting plate so as to face the third and fourth connecting pieces, respectively, and a fifth projecting piece projecting from the upper side portion of the left third connecting plate. 7 connecting piece and the 7th on the upper side part of the right 3rd connecting plate
An eighth connecting piece protruding so as to face the connecting piece;
Between the fourth connecting pieces, between the third and seventh connecting pieces, between the eighth and fifth connecting pieces, and between the sixth and second connecting pieces, respectively.
The first heating conductor and the second heating conductor are arranged so as to face each other so as to heat one of the workpieces, and the third heating conductor and the fourth heating conductor are provided. The conductors are arranged so as to oppose each other so as to heat the other work, and the left power supply conductor, the left first to third connection plates, the fourth connection plate, the first and second insulating plates are connected to these conductors. It is fixed by a first bolt penetrating the plate, and the right power conductor connecting plate, the right first to third connecting plates, the fourth connecting plate, the first and second insulating plates also penetrate the conductor and the plate. It is fixed by the second bolt, and the left and right first to third
Bolt holes provided in the connection plate and through which the first and second bolts penetrate are formed in a substantially oval shape. Further, it is desirable that the power supply conductor includes a terminal block to which the power supply conductor is attached so as to be movable back and forth.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 8 are drawings for explaining the present embodiment, FIG. 1 is a plan view, FIG. 2 is an exploded perspective view of a connecting plate, and FIG.
Is an explanatory view of electrical connection, FIG. 4 is a perspective view of a power supply conductor, FIG. 5 is an exploded perspective view of a main part of the power supply conductor, FIG. 6 is a cross-sectional explanatory view of a part of a heating coil, and FIG. FIG. 8 is a sectional view taken along the line B, and FIG.

As shown in FIGS. 1 and 2, the heating coil 100 of this embodiment is arranged so that the left and right power supply conductors 91 and 92 are opposed to the left and right power supply conductors 91 and 92, respectively. The left and right first connecting plates 11 and 12, and the left and right second connecting plates 21 arranged so as to face the left and right first connecting plates 11 and 12 via the first insulating plate 51, respectively. 22 and second left and right through the second insulating plate 52
The left, which is arranged so as to face the connection plates 21 and 22, respectively.
The right third connecting plates 31 and 32 and the fourth connecting plate 40 arranged so as to face the left and right third connecting plates 31 and 32 are provided. The right power supply conductor 92 and the right first to third connection plates 12, 22, 32 are
Left power conductor 91, left first to third connecting plates 11, 21, respectively
It has the same shape as 31.

Further, the heating coil 100 includes the first left connecting plate 11
First connecting piece 61 protruding from the lower part of the side of the
A second connecting piece 62 is provided on the lower side of 12 so as to be opposed to the first connecting piece 61, and third and fourth connecting pieces are provided on the upper side and the lower side of the left second connecting plate 21, respectively. 63, 64 and the right second
Fifth and sixth connecting pieces 6 projectingly provided on the upper and lower sides of the connecting plate 22 so as to face the third and fourth connecting pieces 63 and 64, respectively.
5, 66, a seventh connecting piece 67 protruding from the upper side portion of the left third connecting plate 31, and a convex connecting piece 67 protruding from the upper side portion of the right third connecting plate 32 so as to face the seventh connecting piece 67. And an eighth connection piece 68.

As shown in FIGS. 1 and 3, a heating coil
100 further includes a third connecting piece 61 and a fourth connecting piece 64 between the third connecting piece 61 and the fourth connecting piece 64.
Between the connecting piece 63 and the seventh connecting piece 67, between the eighth connecting piece 68 and the fifth connecting piece 65, and between the sixth connecting piece 66 and the second connecting piece 62,
Each of them is provided with connected first to fourth heating conductors 1 to 4. The power supply conductor, the connection plate, the connection piece, and the heating conductor are all made of a metal having good conductivity, for example, copper.

As shown in FIG. 4, left and right power supply conductors 91, 92
Two bolt holes 96 are formed at one end of each of the holes. Further, as shown in FIG. 2, the left first to third connecting plates 11, 21, 31 and the right first to third connecting plates 12, 22,
Two 32 oval bolt holes 71 are formed in each 32. Also, the 4th connection plate has 4 bolt holes.
72 have been opened. And the left power conductor 91, the first left
The third connecting plates 11, 21, 31, the fourth connecting plate 40, the first and second insulating plates 51, 52 are the first bolts penetrating these bolt holes.
It is fixed by 81a and nut 81b. Further, the right power supply conductor 92, the right first to third connecting plates 12, 22, 32, the fourth connecting plate 40, the first and second insulating plates 51, 52 are also the second bolts 82a penetrating these bolt holes. And is fixed by a nut 82b.

As shown in FIG. 4, left and right power supply conductors 91, 92
Are the bolts inserted in the bolt holes 97 opened in these plates.
97a and nuts 97b are fixed to each other via an insulating plate 53. 93 and 94 are left and right terminal blocks, respectively, and one end portion of these terminal blocks 93, 94 is connected to the bolts 97a and nuts 97b inserted in the bolt holes 97 formed in these blocks through the insulating plate 54. , Fixed to each other.

The other end portions of the terminal blocks 93 and 94 sandwich the other end portions of the left and right power supply conductors 91 and 92 from both sides, and the sandwiched portions sandwich the left and right power supply conductors 91 and 92 and the terminal block 93. ,
As shown in FIG. 5, bolt holes 98 are formed in the terminal block 94, and oval bolt holes 95 are formed in the right power supply conductor 92 so that the 94 are fixed to each other. Terminal block
Similar bolt holes are formed in 93 and the left power conductor 91, respectively. Then, the bolt 98 inserted into the bolt holes 98 and 95
The terminal blocks 93 and 94 and the left and right power supply conductors 91 and 92 are fixed by a and the nut 98b. Note that 931 and 941 are
Each of the left and right power supply conductors 91, 92 is a mounting block for mounting on, for example, a frame of a high-frequency heating device (not shown), and 99 is a hole for a bolt (not shown) for fixing these mounting blocks to the frame.

FIG. 5 shows a connecting portion procedure between the heating conductors 1 to 4 and the first to eighth connecting pieces, taking the connection between the heating conductor 1 and the connecting piece 61 as an example. The heating conductors 1 to 4 are made of hollow square bars. Cut off the side 1a of the open end of the heating conductor 1, insert the connection piece 61 into the heating conductor 1, and braze the contact part 1b between the connection piece 61 and the heating conductor 1 to braze the end of the heating conductor 1. Seal.

As shown in FIG. 7, the heating conductors 1 and 2 are provided with connection ports 6 which are electrically connected to the hollow portions 8, and a cooling liquid supply pipe 7 is attached to these connection ports 6. On the inner surfaces of the heating conductors 1 and 2, there are a plurality of cooling liquid injection holes.
5 have been established. The heating conductors 3 and 4 are also provided with similar connection ports, cooling liquid supply pipes, and cooling liquid injection holes. As shown in FIG. 8, between the heating conductors 1 and 2,
A slight gap G is provided between the heating conductors 3 and 4.

Next, the assembly of the heating coil 100 will be described. First, after fixing the terminal blocks 93 and 94 to each other with the bolt 97a and the nut 97b, and the left power conductor 91 and the right power conductor 92 to each other, with the bolt 98a and the nut 98b, the terminal blocks 93 and 94 and the left and right power conductors are fixed. Connect and fix 91 and 92. Next, between the first and fourth connection pieces 61 and 62, between the third and seventh connection pieces 63 and 67, between the eighth and fifth connection pieces 68 and 65, and between the sixth and second connection pieces 66 and 62. , Heating conductors 1 to 4 respectively
Are brazed as shown in FIG. At this time, the heating conductors 1 and 2 should overlap each other in a plan view, and
The heating conductors 3 and 4 are arranged so as to overlap each other in plan view. After this, bolts 81a, 82a and nuts 81b, 82b
According to, the left first to third connection plates 11, 21, 31 and the right first to first connection plates
Third connection plate 12, 22, 32, fourth connection plate 40, and insulating plate 5
1 and 52 are fixed to the left and right power supply conductors 91 and 92.

Then, the distance L between the centers of the heating conductors 1 and 4 is measured, and if correction is required, the bolts 81a, 82
Since a is loosened and the left first to third connecting plates 11, 21, 31 and the right first to third connecting plates 12, 22, 32 are appropriately moved in the direction connecting the centers of the heating conductors 1 and 4, Again, all connecting plates and insulating plates are fixed to the left and right power supply conductors 91 and 92 by bolts 81a and 82a and nuts 81b and 82b.

Further, the mounting bases 931 of the terminal blocks 93, 94,
When the distance D between 941 and the center of the heating conductors 1 and 4 is measured, and if correction is required, loosen the bolt 98a and move the left and right power supply conductors 91 and 92 forward and backward from the terminal blocks 93 and 94 as appropriate. Then, the left and right power supply conductors 91 and 92 are fixed to the terminal blocks 93 and 94 again with the bolt 98a and the nut 98b.

Next, the operation of the heating coil 100 will be described.
The heating coil 100 descends from above with respect to the two works W installed at the position to be heated, and one work W is heated by the heating conductors 1 and 2, and the other one work W is heated by the heating conductors. 3, 4
Fits on. Terminal block 93, 94 mounting base 931, 941
When a high-frequency voltage is applied from a high-frequency power source (not shown), the high-frequency current is generated by the terminal block 93, the left power conductor 91, the left first connection plate 11, the first connection piece 61, the heating conductor 1, and the fourth connection piece.
64, left second connection plate 21, third connection piece 63, heating conductor 2, seventh
Connection piece 67, left third connection plate 31, fourth connection plate 40, right third connection plate 32, eighth connection piece 68, heating conductor 3, fifth connection piece 65, right second connection plate 22, sixth connection Piece 66, heating conductor 4, second connecting piece 6
2, the right power supply conductor 92 and the terminal block 94 flow in this order, or in the reverse order, and the heating conductors 1 to 4 heat the two works W.

When the work W is heated for a predetermined time,
The cooling liquid is delivered to the cooling liquid supply pipe 7, and the cooling liquid reaching the hollow portions of the heating conductors 1 to 4 is jetted toward the work W from the cooling liquid injection hole 5 to cool the work W and quench it. finish.

[0023]

As described above, in the heating coil of the present invention, the heating conductor is connected in the heating coil having the annular heating conductor for simultaneously heating the two axial works arranged in parallel. The bolt hole for fixing the connection piece to the power supply conductor has an oval shape so that the connection piece can be moved in a direction connecting the centers of the heating conductors. That is, since the distance between the centers of the heating conductors can be adjusted after the heating coil is assembled, the distance between the centers of the heating conductors can be set to a predetermined value without trouble. Further, since the position of the heating conductor in the direction perpendicular to the direction connecting the centers of the heating conductors can be similarly adjusted, the position of the heating coil in the direction perpendicular to the direction can also be adjusted without trouble.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a connection plate according to an embodiment of the present invention.

FIG. 3 is an electrical connection explanatory diagram of an embodiment of the present invention.

FIG. 4 is a perspective view of a power supply conductor according to an embodiment of the present invention.

FIG. 5 is an exploded perspective view of a main part of a power supply conductor according to an embodiment of the present invention.

FIG. 6 is a partial cross-sectional view of an embodiment of the present invention.

7 is a cross-sectional view taken along the line AA of FIG.

FIG. 8 is a side view taken along arrow B in FIG.

FIG. 9 is an explanatory diagram of a conventional heating coil.

[Explanation of symbols]

 1 to 4 Heating conductor 11 Left first connecting plate 12 Right first connecting plate 21 Left second connecting plate 22 Right second connecting plate 31 Left third connecting plate 32 Right third connecting plate 40 Fourth connecting plate 51, 52th 1st, 2nd insulating plate 61-68 1st-8th connecting piece 71 Bolt hole 81a, 82a Bolt 91 Left power conductor 92 Right power conductor 100 Heating coil 931, 941 Terminal block W work

Claims (2)

(57) [Scope of utility model registration request] 1. A high-frequency heating coil for two shaft-shaped workpieces arranged in parallel, comprising left and right power supply conductors, and left and right first connection plates arranged so as to face these power supply conductors, respectively. , Left and right second connecting plates arranged so as to face the left and right first connecting plates through the first insulating plate, respectively.
A connection plate, a left and right third connection plate arranged so as to face the left and right second connection plates via a second insulating plate, and an arrangement arranged so as to face the left and right third connection plate. The fourth connecting plate, the first connecting piece protruding from the lower side portion of the left first connecting plate, and the second connecting piece protruding from the lower side portion of the right first connecting plate so as to face the first connecting piece. The connecting piece, the third and fourth connecting pieces protruding on the upper side and the lower side of the left second connecting plate, and the third and fourth connecting pieces on the upper side and the lower side of the right second connecting plate, respectively. 5th and 6th connecting pieces projecting to face each other, 7th connecting piece projecting on the upper side portion of the left 3rd connecting plate, and 7th connecting piece on the upper side portion of the right 3rd connecting plate. The eighth connecting piece that is provided so as to face each other, and between the first and fourth connecting pieces, between the third and seventh connecting pieces, the eighth connecting piece,
An annular first to fourth heating conductor, which is connected between the fifth connecting piece and between the sixth and second connecting pieces, respectively, is provided, and the first heating conductor and the second heating conductor form one workpiece. The third heating conductor and the fourth heating conductor are disposed so as to face each other so as to heat, and the third heating conductor and the fourth heating conductor are disposed so as to face each other so as to heat the other work, and the left power source conductor and the left first to first Third connection plate, fourth connection plate, first,
The second insulating plate is fixed by a first bolt penetrating the conductor and the plate, and the right power conductor connecting plate, the right first
The third connecting plate, the fourth connecting plate, the first and second insulating plates are also fixed by the conductor and the second bolt penetrating the plates, and are provided on the left and right first to third connecting plates, respectively. First
A high-frequency heating coil for a shaft-shaped work, characterized in that a bolt hole through which the second bolt penetrates is formed into a substantially oval shape. 2. The high-frequency heating coil for a shaft-shaped work according to claim 1, wherein the power supply conductor includes a terminal block to which the power supply conductor is attached so as to be able to move back and forth.