JP2544190Y2 - Semi-open saddle type high frequency heating coil body - Google Patents

Description

[Detailed description of the invention]

[0001]

[Industrial application] The present invention relates to a crankshaft jig.
Semi-open saddle type high frequency heating core for heating journals and pins
Ill body.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to the drawings. 5 and 6 show a conventional semi-open saddle type high frequency heating coil.
FIG. 5 is a view for explaining a body (hereinafter, simply referred to as a heating coil body) , and FIG. 5 is an explanatory cross-sectional view taken along line BB of FIG.
FIG. 6 is an explanatory front view of the heating coil body .

First, a conventional heating coil 200 will be described. The heating coil body 200 is a semi-open saddle type heating coil 2.
0 and a pair of parallel plate side plates 21 made of brass and the like, which are spaced apart from each other and support the heating coil 20 via a member (not shown). . The heating coil 20 is provided with heating coil pieces 20a and 20b that are connected in series and arranged in the circumferential direction of the journal 30 so as to face each other. Reference numerals 51 and 51 denote lead bars for supplying power to the heating coil 20, and the upper end is connected to an input terminal 52 of the heating coil body 200. The input terminal 52 is connected and fixed to an output terminal 53 of a transformer 54 that supplies a high-frequency current to the heating coil 20.

[0004] The heating coil body 200 includes a coil side plate 2.
A pair of spacers 40, 40 are provided so as to face the lower center of the first and the first 21, respectively. Further, a pair of spacers 41, 41 and spacers 42, 42 disposed to face each other are provided on one side and the other side of the lower part of the coil side plates 21, 21 similarly to the spacers 40, 40. I have. Each spacer 40, 41, 42 is fixed to the coil side plate 21 by a countersunk screw 49. 9
Numeral 0 denotes an interposed member held by the spacers 40, 40, and the spacers 41, 41 and 42, 42 also sandwich the same interposed member 90. The work to be heated by the heating coil 20 is a journal 3 of a crankshaft.
0 was picked. Reference numeral 31 denotes an axis of the crankshaft, which is a straight line connecting the center points of the pins.

As shown in FIG. 5, the distal end portion of each spacer is a cylindrical portion 34 of the journal 30, an R portion 32 following the cylindrical portion 34, and a cylindrical portion following the R portion 32, as shown in FIG. It is formed so as to correspond to the shape of the fillet portion 33 orthogonal to the portion 34.

When the journal 30 is heated by the heating coil body 200, the heating coil body 200 is lowered together with the transformer 54, and the spacers 40, 41, 42
Heating coil body 200 so that
Is placed on the journal 30. Next, while rotating the crankshaft about the axis 31 in, for example, the direction of arrow P, a high-frequency current is supplied to the heating coil 20 for a predetermined time to heat the surface of the journal 30. Thereafter, a quenching liquid is injected into the journal 30 to cool it, and the journal 3 is cooled.
The quenching of the 0 surface is terminated.

[0007]

However, the spacer 4 provided on the heating coil body 200 described above.
0, 41 and 42 have the following problems. That is, first, a load of a difference between a total load of the heating coil body 200 and the transformer 54 and a force of a spring (not shown) suspending the transformer 54 for pulling the transformer 54 upward is applied to the spacer 40. Therefore, when heating while rotating the crankshaft, the spacer 40 is worn over time. Other spacers 41,
The load applied to the spacer 42 is smaller than the load applied to the spacer 40, but still wears over time.

When the tip of each spacer that comes into contact with the workpiece is worn, it must be replaced with a new spacer. Each spacer is made of ceramic or stainless steel and is attached to the tip that contacts the workpiece. Since a cemented carbide is used, it is very expensive per weight and cannot be repaired for use. Therefore, it has been demanded to reduce the manufacturing cost and operating cost of the spacer.

The present invention has been made in view of the above circumstances, and not only the front end of the spacer but also the rear end thereof comes into contact with the work so that the distance between the heating coil and the work can be kept constant. Provide heating coil body , heating coil
The aim is to reduce the operating and manufacturing costs of the body .

[0010]

In order to solve the above problem, a heating coil body according to claim 1 is provided with a crankshaft.
Semi-open saddle-type high circumference for high frequency heating of journal and pin
Wave heating coil and one pair supporting this high frequency heating coil
Coil side plate, and the lower center and coil of this coil side plate.
Of the bottom of the side plate
The distance between the high-frequency heating coil and the surface to be heated is kept constant.
Each combined with the high frequency heating coil to keep
A pair of spacers;
The front and rear ends of the crankshaft are
A cylindrical portion of the surface to be heated, an R portion following the cylindrical portion, and R
Has a shape corresponding to the fillet part following the part
It is characterized by that.

[0011]

【Example】 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
I do. 1 to 3 are drawings for explaining a first embodiment.
FIG. 1 shows a spacer for a heating coil (hereinafter referred to as a heating coil).
Perspective view and diagram of a spacer for use as a spacer 10)
2 is a sectional view taken along line AA of FIG. 3, and FIG.
It is a front explanatory view of a heating coil body. FIG. 4 shows a second embodiment.
It is a perspective view of the spacer of FIG. For the work, the conventional technique
Crankshaft jaws as described in
I took up the final. In addition, what was explained in the prior art
Those having the same or the same functions as those in
The description is omitted.

As shown in FIG . 3, the heating coil 100
A pair of coil side plates 21, 21
As shown in FIG. 2, the pair of spacers 10 is a conventional spacer.
As in the case of the coil 40, it faces the inside of the coil side plates 21 and 21.
So that the spacers 10 and 10 are
Together with the intervening member 90,
It is fixed to the side plates 21, 21.

The distal end portion 101 of the spacer 10 is shown in FIG.
As shown in FIG. 2 and FIG.
As well as the cylinder of the crankshaft journal 30
Portion 34, R portion 32 following cylindrical portion 34, and R portion
The fillet that is orthogonal to the cylindrical portion 34
It is formed so as to correspond to the shape of the gate portion 33. So
The rear end portion 102 of the spacer 10 is also
Same shape as 1 and protrudes in the opposite direction to the tip 101
It is formed so that. 48 has a countersunk screw 49 inserted
Screw holes. The conventional pair of spacers 4
The spacers 11 and 12 corresponding to the spacers 1 and 42 are also
Like 0, the rear end is formed in the same shape as the front end
I have.

Therefore, an example in which the heater coil is attached to the heating coil body
For example, when the tip portion 101 of the spacer 10 is worn
After removing the spacer 10 from the coil side plate 21,
Make sure that the rear end portion 102 contacts the journal 30.
Be disposed at a position for which the tip portion 101 of the Coil le side plate 2
1, the rear end portion 102 is also connected to the front end portion 101.
Similarly, keep the distance between the journal 30 and the heating coil 20 constant.
Can be kept. Therefore, the heating coil body of the present embodiment
According to 100, one spacer can be used twice
Therefore, the operating cost of the heating coil body can be reduced.

Next, a second embodiment of the present invention will be described. No.
The spacer 10A according to the second embodiment includes a front end portion 101A and a rear end portion 101A.
The shape of the end portion 102A is different, and
A corresponds to the journal 30 of the crankshaft, for example
The rear end portion 102A is, for example,
To the same pin (not shown) on the same crankshaft as above.
It is formed in a corresponding shape. In this way,
Space provided on the heating coil body 100 for heating the internal 30.
Spacer 10 and a heater coil body for heating the pin.
And one type of spacer
The number of spacers reduces
It can contribute to reduction.

[0016]

As has been described above devised], pressurizing of claim 1, wherein
Heat coil body, the previous end portion of the spacer, the rear end portion Togaso
Cylinder part, cylinder part of the heated surface of the crankshaft, respectively
R part following minute and fillet part following R part
Has a shape corresponding to. Therefore, this spacer
Is used until both the front and rear ends are worn
Operation cost of the heating coil body can be reduced.
Can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a spacer according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG. 3;

FIG. 3 is an explanatory front view of the heating coil body provided with the spacer according to the first embodiment of the present invention;

FIG. 4 is a perspective view of a spacer according to a second embodiment of the present invention.

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

FIG. 6 is an explanatory front view of a conventional heating coil body provided with a heating coil spacer.

[Explanation of symbols]

10, 11, 12 , 10A Spacer 20 Heating coil 30 Journal 31 Shaft core 32 R part 33 Fillet part 34 Cylindrical part 100 Heating coil body 101, 101A Front end part 102, 102A Rear end part

Claims (1)

(57) [Scope of request for utility model registration] A journal and pin for a crankshaft.
Semi-open saddle type high frequency heating coil for high frequency heating
A pair of coil side plates supporting a high-frequency heating coil;
One of the lower center of the coil side plate and the lower part of the coil side plate
The high-frequency heating core is disposed so as to face each other.
The high frequency is used to keep the distance between the
A heating coil and a pair of spacers integrally coupled thereto.
And each of the spacers has a front end portion and a rear end portion.
The cylinder part of the heated surface of the crankshaft,
The R part following the cylindrical part and the fillet following the R part
Characterized in that it has a shape corresponding to the
Open saddle type high frequency heating coil body.