JPS5855242Y2 - Induction hardened coil base structure - Google Patents

Description

[Detailed explanation of the invention] This invention is based on an induction hardening coil used for shaft hardening and inboard joint groove hardening, which has a reinforcing body connected to the secondary conductor and offset amount with the secondary conductor. The invention relates to a base structure in which the reinforcing body is an insulator, and rigidity is strengthened by making the reinforcing body an insulator and joining at least one of the quenched coil and the secondary conductor with a spigot, and the quenched coil This relates to an induction hardened coil base structure in which a secondary conductor and a secondary conductor are bonded to each other.

As is well known, induction hardening has been used for various purposes such as shaft hardening and inboard joint groove hardening.

The hardening apparatus used for the induction hardening is heated by a heating inductor connected to a hardening coil via a secondary conductor from a Karen lance connected to an oscillator.

FIG. 1 shows the base structure of the general hardened coil.
The secondary conductor 1 is made of copper and is connected via a flange 2.2 and bolts 3, 3 to the flange 2, 2 to a copper lead plate 4, to which a hardened coil 5 of a heating inductor is connected. It was made to look like this.

Therefore, as shown in the figure, first the secondary conductor 1 of the hardened coil 5 is
The offset amount is large, and as a result, the main dimensions become distorted due to thermal distortion and unavoidable changes due to use over time, and the quality accuracy of the quenched product gradually deteriorates.

In addition, in general, the rigidity at the base of the hardened coil 5 largely depends on the rigidity of the hardened coil 5 itself, and the amount of offset is large, so there is a limit to the rigidity. However, since the lead plate has a complicated shape and a large number of soldering points, which increases the cost, and because a low melting point brazing filler metal is used, thermal deformation due to high heat radiation causes distortion, causing the above changes. There was also the drawback that the process was extremely cumbersome as it was exchanged through a .

The purpose of this invention is to connect the hardened coil directly to the secondary conductor, in view of the problems of the hardened coil base based on the above-mentioned conventional technology.
An excellent induction hardened coil base in which the secondary conductor and the hardened coil are connected through spigot engagement of one of the insulating materials to both, thereby eliminating the lead plate, reducing the amount of offset, and increasing the rigidity. It is intended to provide structure.

The configuration of this invention, which meets the above objectives, improves assembly accuracy by directly bonding and assembling the hardened coil to the secondary conductor, eliminates offset, and reduces costs by reducing the number of parts in the coil replacement section. Also, an insulator is used as a combination of the hardened coil and the secondary conductor, and at least one of them is joined with a spigot to improve assembly accuracy and increase the joint rigidity to prevent aging and thermal distortion. The main purpose of this is to reduce the amount of damage as much as possible.

Next, an embodiment of this invention will be described below based on the drawings from FIG. 2 onwards.

In the embodiment shown in Fig. 2.3.4, 6 is a well-known heating inductor for a hardening coil for induction hardening of shafts, and 7 is a cooling water annular cavity in which a hardening is done in the center. A workpiece set hole 8 is provided.

Further, 9, 9 are copper secondary conductors connected to a current I lance (not shown), and each of the secondary conductors 9, 9 and the above-mentioned hardened coil 6 are connected to the inlet part 10 as shown in FIG. They are designed to be directly coupled together via the

11 is an insulator made of Bakelite, and the secondary conductor 9,
The secondary conductor 9 is in contact with the hardened coil 6 through a stepped portion 12, the flange 13 is in contact with the hardened coil, and the bolt 14 that protrudes from the hardened coil 6 through the insulator 11 has a rounded shape. H41 and a locking nut 142 are screwed together to integrally connect them.

Therefore, when assembling the hardened coil 6 and the secondary conductors 9, 9,
By fitting and centering the insulator 11 between the stepped portion 12 and the flange portion 13, and tightening the bolts, the insulator 11 is smoothly integrated without misalignment, and the secondary of the hardened coil 6 is Offset to conductor 9.9 can be eliminated.

Incidentally, reference numeral 15 denotes a hardening workpiece insertion set hole drilled in the insulator 11, and is centered on the hardening workpiece insertion hole 8 of the hardening coil 6.

In the above configuration, when a workpiece such as a predetermined shaft (not shown) is inserted into the set holes 8 and 15 and a high frequency wave is oscillated, a predetermined hardening operation is performed.

In this case, since the hardened coil 6 is accurately aligned and connected to the secondary conductors 9 through the spigot fitting 10, the hardening accuracy can be accurately obtained, and the brazed parts etc. Since there is no thermal distortion, there is no change over time, and since there is no offset amount, accuracy can be maintained accurately.

Further, since the insulator 11 firmly clamps the two, no deterioration occurs over time.

Therefore, the quality will not deteriorate in accuracy due to long-term use.

Therefore, when inspecting and replacing the hardened coil 6 due to long-term use, it is preferable to disassemble it by performing the reverse process to the above-mentioned assembly process.

Incidentally, the stepped portion 12 and the flange overhang portion 13 between the hardened coil 6 and the insulator 11 can be considered as a kind of spigot joint, but in this embodiment, the insulators 11 and 2 of the hardened coil 6 It is also possible to design it so that the spigot is fitted to either one of the secondary conductors 9, 9.

Further, in the embodiment shown in FIGS. 5 and 6, the inboard joint groove part hardened coil is used, and the hardened coil 6' is 2
It is joined to the next conductor 9' without any offset amount, and is joined to the Bakelite insulator 11' via the spigot joint part 16 (pol) 14', 14', etc., and the three parts are tightened together. cage, its base and hardened inductor 17.17
．． The rigidity of the hardened coil 6' is increased to suppress thermal distortion of the hardened coil 6', thereby maintaining good quality accuracy and enhancing durability.The basic function and effect are the same as those of the above embodiment. It's not something that will change.

It should be noted that the embodiments of this invention are not limited to the above two embodiments, and it goes without saying that other aspects and design changes are possible.

As mentioned above, according to this invention, in the induction hardened coil base structure, the hardened coil is brought into direct contact with the secondary conductor, and the insulator is integrally joined by overhanging both. Since the lead plate is basically omitted, the amount of offset is eliminated, and the setting becomes more accurate and the precision of the hardened product is improved, which is an extremely excellent effect.

Furthermore, since the lead plate is eliminated, the rigidity is increased, which also has the effect of preventing distortion and maintaining good accuracy.

Furthermore, since the insulator is connected to at least one of the hardened coil and the secondary conductor by spigot jointing, the base is always connected with a constant precision, and since there is no brazing etc., the set amount is accurate. It is maintained at a high temperature and is hardly affected by thermal distortion or aging, and also has the advantage that inspection and replacement work can be done quickly.

Furthermore, since the lead plate can be eliminated as described above, the number of parts at the base of the quenched coil is reduced, and there is also the advantage that the device can be made smaller, lighter, and lower in cost.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the hardened coil base structure based on the conventional technology;
Figure 2 and subsequent figures show examples of this invention.
The figure is a plan explanatory diagram of one embodiment, and Figure 3 is Figure 2 III-I.
4 is an explanatory view corresponding to the cross section taken along the line IV-V in FIG. 2, FIG. 5 is an explanatory side view of another embodiment, and FIG. 6 is an explanatory view of the back side of the same. 9.9...Secondary conductor, 6,6'...Hardened coil, 11゜11'...Reinforcement body (insulator)
, 12.16...Inlay fitting (part).

Claims (1)

[Scope of utility model registration request] In a hardened coil base structure in which a hardened coil that is connected and supported by a secondary conductor has a reinforcing body and is directly connected to the secondary conductor, the hardened coil directly contacts and connects to the secondary conductor. is,
Further, an insulator is provided that overhangs both the hardened coil and the secondary conductor and connects them together, and at least one of the insulator and the secondary conductor has an uneven surface between the hardened coil and the hardened coil. An induction hardened coil base structure characterized by interlocking.