JPH06330178A - Movable induction hardening apparatus for bar-like work - Google Patents

Abstract

PURPOSE:To increase a moving velocity for hardening a bar-like work and to eliminate the necessity of return-back of a movable induction hardening apparatus to the waiting position, where a 1st work stays before hardening, in order to harden the following work after hardening the precedent bar-like work. CONSTITUTION:The movable induction hardening apparatus 101 for bar-like work W rotating centering the axial line W1 is provided with a first and a second high frequency electric sources H1, H2 having different frequencies, a complex heating coil 50 arranging a first and a second heating coils 10, 20 having the same shape, a first and a second complex jackets 60, 70 having the same shape and arranged on both sides in the axial line W1 direction of the complex heating coil 50 and a moving means 80 for integrally moving the complex heating coil 50 and the first and the second complex jackets 60, 70 in the axial line W1 direction. In the case of moving the apparatus 101 in a J or K direction with a circuit changeover device 90, the work is preheated with the first heating coil 10 and the second heating coil 20, and after regular heating of the work with the second coil 20 or the first coil 10, the work is cooled with the complex jacket 60 or 70.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-frequency moving hardening apparatus for bar-shaped works.

[0002]

2. Description of the Related Art A conventional technique will be described below with reference to the drawings. FIG. 9 is a vertical cross-sectional explanatory view of a conventional high-frequency moving hardening apparatus for a rod-shaped work and the rod-shaped work W. Conventionally, for induction hardening of the outer peripheral surface of a rod-shaped workpiece having a diameter of 25 mm (hereinafter, the outer peripheral surface of the rod-shaped workpiece is simply referred to as the workpiece peripheral surface), first, as shown in FIG. One end Wa is supported by the center 1 and the other end Wb is supported by the center 2, and is rotated at a speed of 120 to 240 rpm, for example, about a longitudinal axis W1 of the rod-shaped work W by a rotating device (not shown).

An annular high-frequency heating coil (hereinafter, the high-frequency heating coil is also simply referred to as a heating coil) 3, an annular jacket 4 for injecting a quenching liquid arranged adjacent to the heating coil 3, and heating A moving hardening apparatus 5 having a moving means (not shown) capable of moving the coil 3 and the jacket 4 integrally in the direction of the axis W1 is shown in FIG.
Place in the standby position C indicated by the dotted line
When the rod moves a little further than one end Wa of the rod-shaped work W, a high-frequency current is passed through the heating coil 3 and the jacket 4
In order to insert the rod-shaped workpiece W into the heating coil 3 and the jacket 4 in a state where the quenching liquid L is jetted from the moving quenching device 5, the moving quenching device 5 is moved in the direction of the axis W1 ( In the direction of arrow J) at a speed of, for example, 10 mm / sec.

Then, as the moving and hardening apparatus 5 moves,
A hardened layer W3 is formed on the work peripheral surface W2. Then, when the heating coil 3 comes just before passing the other end Wb of the rod-shaped workpiece W, the power supply to the heating coil 3 is stopped,
Further, when the jacket 4 has finished passing through the other end Wb of the rod-shaped work W and reaches the quenching end position D shown by the dotted line, the injection of the quenching liquid L from the jacket 4 is stopped and the moving quenching device 5 Also stops moving.

Next, after the centers 1 and 2 are retracted and the rod-shaped workpiece W is removed, the moving and quenching device 5 is moved by the above-mentioned moving means (not shown) to the arrow K which is the opposite direction to the moving direction during quenching. And moves to the standby position C and stops. Then, the next rod-shaped work W is supported between the centers 1 and 2, and quenching is performed similarly to the first rod-shaped work W.

[0006]

Recently, the quenching industry has been extremely competitive, and the overall quenching work time is shortened even when quenching the outer peripheral surface of a large number of rod-shaped workpieces in order to improve productivity. Is required to do so. Therefore, in the conventional moving quenching apparatus described above, first, it is desired to increase the moving quenching speed, but if so, there are the following problems. That is, if the moving and quenching speed is increased and the heating power is inevitably increased, as long as the annular heating coil is used, a barber mark (which appears on the hardened surface and is a spiral like a barbershop sign) Often occurs, and the formed cured layer tends to be non-uniform.

When the moving quenching speed is increased, not only the heating power must be increased but also the quenching liquid amount in a unit time must be increased. However, simply increasing the quenching liquid amount is not enough. , The cooling of the rod-shaped workpiece after the start of martensitic transformation is excessive (for example, the temperature of the rod-shaped workpiece is approximately
There is a risk of quenching cracks (falling down to about 100 degrees).

In addition, as long as the moving quenching apparatus as described above is used, after quenching one rod-shaped workpiece, the moving quenching apparatus and the first workpiece are quenched in order to quench the next rod-shaped workpiece. Although it is necessary to return to the standby position before the start, the time for returning the moving and quenching device to the standby position in this way is one of the reasons for prolonging the entire quenching work time.

The present invention was conceived in view of the above circumstances, and it is possible to increase the quenching movement speed and to quench the next work after quenching the work. It is an object of the present invention to provide a high-frequency moving quenching apparatus for bar-shaped workpieces that does not need to return to the standby position before the start of quenching.

[0010]

In order to solve the above problems, a high-frequency moving quenching apparatus for a rod-shaped work according to a first aspect of the present invention is a high-frequency moving quenching apparatus for a rod-shaped work rotating around a longitudinal axis. In the insertion device, a first high-frequency power source, a second high-frequency power source having a frequency different from that of the first high-frequency power source, and first and second high-frequency heatings of the same shape which are arranged close to the peripheral surface of the rod-shaped workpiece to heat the peripheral surface. A composite high-frequency heating coil provided with a coil, first and second composite jackets of the same shape, which are respectively arranged on both sides of the composite high-frequency heating coil in the axial direction, and eject a quenching liquid to the peripheral surface, and the composite high-frequency wave The first high-frequency heating coil is provided with a heating coil and a moving unit that moves the first and second composite jackets integrally in the direction of the axis or moves the rod-shaped work in the direction of the axis. Is a pair of linear first heating conductors arranged in parallel with the axis, a second heating conductor having an approximately 1/2 arc shape connecting one ends of the first heating conductors, and a first heating Approximately 1 / each connected to the other end of the conductor
A pair of four arc-shaped third heating conductors, one end of which is connected to the third heating conductor, and the other end of which is connected to the first or second high-frequency power source via circuit switching means. The second high-frequency heating coil has a pair of linear fourth heating conductors arranged in parallel to the shaft core line and a substantially half arc shape connecting one ends of the fourth heating conductors. Of the fifth heating conductor and the other end of the fourth heating conductor of approximately 1 /
A pair of four arc-shaped fifth heating conductors, one end of which is connected to the fifth heating conductor, and the other end of which is connected to the first or second high-frequency power source via the circuit switching means. A conductor, and the first heating conductor and the fourth heating conductor are arranged at substantially 90 degrees apart in the circumferential direction of the rod-shaped work,
The first and second composite jackets are respectively arranged adjacent to the composite high-frequency heating coil, have a strong jetting force of the quenching liquid, and are substantially semi-circular quenching jackets that rapidly cool the rod-shaped work with a relatively small amount of liquid. And a substantially semi-annular gradual cooling jacket which is disposed on the anti-composite high frequency heating coil side of the quenching jacket and has a weak jetting force of the quenching liquid and gradually cools the rod-shaped work with a relatively large amount of liquid.

According to a second aspect of the present invention, there is provided a high-frequency moving quenching apparatus for a rod-shaped workpiece, wherein the first high-frequency power source and the first high-frequency power source are used in the high-frequency moving quenching apparatus for a rod-shaped workpiece rotating about a longitudinal axis. A second high frequency power source having a different frequency, a composite high frequency heating coil provided with first and second high frequency heating coils of the same shape which are arranged close to the peripheral surface of the rod-shaped work and heat the peripheral surface, and a composite high frequency heating coil The first and second composite jackets of the same shape, which are respectively arranged on both sides in the axial direction of the shaft and eject the quenching liquid onto the peripheral surface, and the composite high-frequency heating coil and the first and second composite jackets are integrated as a unit. And a moving means for moving the rod-shaped work in the direction of the axis or moving the rod-shaped workpiece in the direction of the axis. A first heating conductor, a substantially 1/3 circular arc shape of the second heating conductor connecting one end comrades first heating conductor substantially connected to the other end of the first heating conductor 1 /
Six arc-shaped pairs of third heating conductors, one end of which is connected to the third heating conductor, and the other end of which is connected to the first or second high-frequency power source via circuit switching means. The second high-frequency heating coil has a pair of linear fourth heating conductors arranged in parallel to the shaft core line and a substantially half arc shape connecting one ends of the fourth heating conductors. Of the fifth heating conductor and the other end of the fourth heating conductor of approximately 1 /
A pair of four arc-shaped fifth heating conductors, one end of which is connected to the fifth heating conductor, and the other end of which is connected to the first or second high-frequency power source via the circuit switching means. A conductor, the first heating conductor and the fourth heating conductor are arranged at an interval of about 60 degrees in the circumferential direction of the rod-shaped work,
The first and second composite jackets are respectively arranged adjacent to the composite high-frequency heating coil, have a strong jetting force of the quenching liquid, and are substantially semi-circular quenching jackets that rapidly cool the rod-shaped work with a relatively small amount of liquid. And a substantially semi-annular gradual cooling jacket which is disposed on the anti-composite high frequency heating coil side of the quenching jacket and has a weak jetting force of the quenching liquid and gradually cools the rod-shaped work with a relatively large amount of liquid.

According to a third aspect of the present invention, there is provided a high-frequency moving and quenching apparatus for a rod-shaped workpiece, wherein the high-frequency power source and the peripheral surface of the rod-shaped workpiece are provided on a peripheral surface of the rod-shaped workpiece. High-frequency heating coils that are arranged close to each other to heat the peripheral surface, and first and second composite jackets of the same shape that are respectively arranged on both sides of the high-frequency heating coil in the axial core line direction and eject the quenching liquid to the peripheral surface. And a moving means for moving the high-frequency heating coil and the first and second composite jackets integrally in the direction of the axis, or moving a rod-shaped work in the direction of the axis. Is a pair of linear first heating conductors arranged in parallel with the axis, a second heating conductor having an approximately 1/2 arc shape connecting one ends of the first heating conductors, and a first heating On the other end of the conductor A first heating coil piece having a respectively connected substantially 1/4 circular arc shape of the pair of third heat conductor, the fourth straight pair disposed parallel to the shaft core
Almost 1 connecting the heating conductor and one end of the 4th heating conductor
/ 2 arc-shaped fifth heating conductor, a second heating coil piece having a substantially arc-shaped fifth heating conductor that connects the other ends of the fourth heating conductors, a first heating coil piece and a first heating coil piece A pair of connecting conductors that connect the respective cutting points of the two heating coil pieces and connect the first heating coil piece and the second heating coil piece in series, one end to the third heating conductor and the other end to the high frequency power supply. And a pair of lead conductors connected to each other, the first heating conductor and the fourth heating conductor are arranged at an interval of about 90 degrees in the circumferential direction of the rod-shaped work, and the first and second composite jackets are , Each of which is arranged adjacent to the composite high-frequency heating coil, has a strong jetting force of the quenching liquid, and is a substantially semi-annular quenching jacket for quenching a rod-shaped work with a relatively small amount of liquid,
The quenching jacket is provided on the anti-composite high-frequency heating coil side and has a substantially semi-annular slow cooling jacket that has a weak jetting force of the quenching liquid and gradually cools the rod-shaped work with a relatively large amount of liquid.

According to a fourth aspect of the present invention, there is provided a high-frequency moving and quenching apparatus for a rod-shaped workpiece, wherein the high-frequency moving and quenching apparatus for a rod-shaped workpiece is rotating about an axis line in the longitudinal direction. High-frequency heating coils that are arranged close to each other to heat the peripheral surface, and first and second composite jackets of the same shape that are respectively arranged on both sides of the high-frequency heating coil in the axial core line direction and eject the quenching liquid to the peripheral surface. And a moving means for moving the high-frequency heating coil and the first and second composite jackets integrally in the direction of the axis, or moving a rod-shaped work in the direction of the axis. Is a pair of linear first heating conductors arranged in parallel to the axis, a second heating conductor having an approximately 1/3 arc shape connecting one ends of the first heating conductors, and a first heating On the other end of the conductor A first heating coil piece having a respectively connected substantially 1/6 circular arc shape of the pair of third heat conductor, the fourth straight pair disposed parallel to the shaft core
Almost 1 connecting the heating conductor and one end of the 4th heating conductor
Second heating coil piece having a third arc-shaped fifth heating conductor and a substantially third arc-shaped fifth heating conductor that connects the other ends of the fourth heating conductors to each other, the first heating coil piece and the first heating coil piece. A pair of connecting conductors that connect the respective cutting points of the two heating coil pieces and connect the first heating coil piece and the second heating coil piece in series, one end to the third heating conductor and the other end to the high frequency power supply. The first heating conductor and the fourth heating conductor are arranged at a distance of about 60 degrees in the circumferential direction of the rod-shaped work, and the first and second composite jackets have a pair of connected lead conductors. , Each of which is arranged adjacent to the composite high-frequency heating coil, has a strong jetting force of the quenching liquid, and is a substantially semi-annular quenching jacket for quenching a rod-shaped work with a relatively small amount of liquid,
The quenching jacket is provided on the anti-composite high-frequency heating coil side and has a substantially semi-annular slow cooling jacket that has a weak jetting force of the quenching liquid and gradually cools the rod-shaped work with a relatively large amount of liquid.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 4 are drawings for explaining an embodiment of the high-frequency transfer quenching apparatus according to claim 1, FIG. 1 is a schematic structural explanatory view, and FIG. 2 (a) is a schematic view of a composite heating coil. 2B is a perspective view of the arrangement of the heating conductors of the composite heating coil viewed from the axial direction of the rod-shaped workpiece W, FIG. 3A is a perspective view of the quenching jacket, and FIG. FIG. 3 (c) is a perspective view of the jacket, FIG. 3 (c) is a perspective view of the nozzle, FIG. 3 (d) is a front view of the slow cooling jacket, and FIG. As the work, the rod-shaped work shown in FIG. 9 described in the related art is adopted.

As shown in FIGS. 1 and 2 (a), a high-frequency moving hardening apparatus (hereinafter, the high-frequency moving hardening apparatus is simply referred to as a moving hardening apparatus) 101 of this embodiment has a frequency of, for example,
First high frequency power supply H1 of 10kHz and frequency is 100kHz
Second high frequency power source H2. The first high frequency power supply H1 is used for preheating the work peripheral surface W2 of the rod-shaped work W, and the second high frequency power supply H2 is used for main heating of the work peripheral surface W2.

The moving hardening apparatus 101 has a longitudinal axis W.
1. A moving and quenching device for a rod-shaped workpiece W rotating around 1, which has first and second heating coils 10 and 20 of the same shape which are arranged close to the rod-shaped workpiece W and heat a workpiece peripheral surface W2. The composite heating coil 50 and the axis W of the composite heating coil 50
First and second composite jackets 60 and 70, which are respectively arranged on both sides in the direction of 1 and eject the quenching liquid onto the work peripheral surface W2,
A composite heating coil 50 and first and second composite jackets 60,
The connecting member 83 for integrally connecting and fixing 70, the composite heating coil 50 and the first and second composite jackets 60, 70 integrally connected and fixed by the connecting member 83 in the direction of the axis W1 (direction of arrow J) And a moving means 80 for moving in the direction of arrow K opposite to arrow J). As the moving means 80, for example, a servo motor and a rod for moving the connecting member 83 in the direction of the axis W1 by a ball screw or the like rotated by the servo motor are used.

The first heating coil 10 includes a pair of linear first heating conductors 11 and 12 arranged in parallel with the axis W1 and a first heating coil.
A second arc-shaped second heating conductor 13 connecting one ends of the heating conductors 11 and 12, and a pair of third arc-shaped third conductors connected to the other ends of the first heating conductors 11 and 12, respectively. Heating conductor 14, 15
And one end is connected to the third heating conductors 14 and 15, and the other end is connected to either the first high frequency power source H1 or the second high frequency power source H2 via the flexible electric wire 81 and the circuit switching device 90. And a pair of first lead conductors 16 and 17.

The second heating coil 20 includes a pair of linear fourth heating conductors 21 and 22 arranged in parallel with the axis W1 and a fourth heating conductor.
A fifth arc-shaped fifth heating conductor 23 connecting one ends of the heating conductors 21 and 22 and a pair of sixth arc-shaped fifth conductors connected to the other ends of the fourth heating conductors 21 and 22, respectively. Heating conductors 24, 25
And one end is connected to the sixth heating conductors 24 and 25, and the other end is connected to either the first high frequency power source H1 or the second high frequency power source H2 via the flexible electric wire 82 and the circuit switching device 90. And a pair of second lead conductors 26 and 27.

In the circuit switching device 90, the first high frequency power source H1 is connected to the first lead conductors 16 and 17, and the second lead conductor 2
6 and 27 are provided with switches 91 and 93 respectively connected thereto, and switches 92 and 94 for respectively connecting the second high frequency power source H2 to the first lead conductors 16 and 17 and the second lead conductors 26 and 27.

Then, as shown in FIG. 2B, the first heating conductor 11 of the first heating coil 10 and the fourth heating coil 20 of the second heating coil 20 are connected to each other.
The heating conductor 21 means the shaft core wire W when viewed from the direction of the shaft core wire W1.
They are arranged at intervals of 90 degrees centered on 1. Therefore,
The first heating conductor 11, the fourth heating conductor 21, the first heating conductor 12, and the fourth heating conductor 22 are arranged at intervals of 90 degrees in the circumferential direction of the rod-shaped workpiece W.

As shown in FIG. 1, the first composite jacket 60
Are arranged adjacent to the composite heating coil 50, and are arranged on the side of the quenching jacket 61 opposite to the composite heating coil 50, and a substantially semi-annular quenching jacket 61 for ejecting the quenching liquid Q to rapidly cool the rod-shaped work W. And a substantially semi-annular gradual cooling jacket 62 for gradual cooling of the rod-shaped work W by ejecting the quenching liquid S.

As shown in FIG. 3 (a), a quenching jacket
A large number of nozzles 63 for ejecting the quenching liquid Q onto the work peripheral surface W2 are provided on the inner peripheral surface of 61. As shown in FIG. 3C, the tip surface of the nozzle 63 has a V-shaped cross section and has a shaft core line W1.
Groove 631 that is bored in the direction of
A nozzle hole 632 is provided which has an opening elongated in the direction of 1, and jets the quenching liquid Q from this opening.
The shower-like quenching liquid Q ejected from the nozzle 63 with a strong ejection force quenches the work peripheral surface W2 with a relatively small amount.

As shown in FIG. 3 (b), a slow cooling jacket
On the inner peripheral surface of 62, the quenching liquid S is jetted to the work peripheral surface W2,
A large number of small circular ejection holes 64, which are larger than the nozzles 63 of the quenching jacket 61, are provided. The slow cooling jacket 62 jets a relatively large amount of the quenching liquid S that is weak from the ejection holes 64 but wraps the work peripheral surface W2, and gradually cools not only the peripheral surface W2 of the rod-shaped work W but also the inside thereof. To do. Both the semi-annular quenching jacket 61 and the gradual cooling jacket 62 spread at an angle slightly larger than 180 degrees in the circumferential direction of the rod-shaped work W, but this angle is in the direction of arrow F shown in FIG. 3 (d). It is desirable to make the rod-shaped workpiece W as large as possible so as to surround the rod-shaped workpiece W in a range where the rod-shaped workpiece W can be taken out.

As shown in FIG. 1, the second composite jacket 70
Is a quenching jacket 61 and a slow cooling jacket 62 of the first composite jacket 60, and a quenching jacket 71 of the same shape, respectively.
And a gradual cooling jacket 72, and the chilling jacket 71 and the gradual cooling jacket 72 are arranged symmetrically with respect to the quenching jacket 61 and the gradual cooling jacket 62 with the composite heating coil 50 as the center.

Next, a quenching method for moving and quenching the work peripheral surface W2 over the entire length of the work by the apparatus of this embodiment will be described. As shown by the dotted line in FIG. 4, the moving quenching device 101 is moved to the first quenching standby position A by the moving means 80, and then the centers 1 and 2 respectively support one end Wa and the other end Wb of the rod-shaped workpiece W. To do. After that, the rod-shaped work W is rotated about the axis W1 in the direction of arrow R, for example, at 600 rpm by a rotating device (not shown), and then the moving and hardening device 101 is moved by the moving means 80 in the direction of arrow J, for example. Move at 25-55 mm / sec.

When the first heating coil 10 of the composite heating coil 50 reaches one end Wa of the rod-shaped workpiece W, the switch 91 is turned on to switch the frequency from the high frequency power source H1 to the first heating coil 10.
Apply high frequency current of 10kHz and switch 93 at the same time.
When the high frequency power supply H2 is turned on and a high frequency current of 100 kHz is applied to the second heating coil 20, the work peripheral surface W2
Is preheated by the first heating coil 10 and then fully heated by the second heating coil 20.

When the quenching jacket 61 of the first composite jacket 60 reaches one end Wa of the rod-shaped work W, the quenching solution Q and the quenching solution S are spouted from the quenching jacket 61 and the gradual cooling jacket 62, respectively. Then the heating coil 1
The work peripheral surface W2 heated by 0, 20 is cooled and quenched.

When the moving and hardening apparatus 101 moves in the direction of arrow J and the second heating coil 20 of the composite heating coil 50 finishes passing the other end Wb of the rod-shaped workpiece W, the switch 91 is turned on.
When 93 is turned off to stop energizing the composite heating coil 50, and when the slow cooling jacket 62 finishes passing the other end Wb of the rod-shaped workpiece W, the ejection of the quenching liquids Q and S is stopped. Then, the moving and quenching apparatus 101 shows the second quenching standby position B indicated by the dotted line.
Of the rod-shaped workpiece W when it arrives at
After stopping the movement of 101, the centers 1 and 2 are retracted and the rod-shaped workpiece W is removed.

After this, the next rod-shaped work W is placed on the center 1 and 2
After being supported by the moving means, the rod-like work W is rotated about the axis W1 in the direction of arrow R, for example, and is moved by the moving means.
When the second hardening coil 20 reaches the other end Wb of the rod-shaped workpiece W by starting the movement of the moving and hardening apparatus 101 in the direction of arrow K by 80, the switch 94 is turned on to turn on the first high-frequency power source H.
A high frequency current having a frequency of 10 kHz is applied to the second heating coil 20 from 1 and at the same time, the switch 92 is turned on to generate a high frequency current having a frequency of 100 kHz from the second high frequency power source H2.
When the work is energized, the work peripheral surface W2 is preheated by the second heating coil 20 and then main heated by the first heating coil 10.

When the quenching jacket 71 of the second composite jacket 70 reaches the other end Wb of the rod-shaped work W,
Quenching liquid Q by quenching jacket 71 and slow cooling jacket
When the injection of quenching liquid S by 72 is started, the work peripheral surface W2
Is being quenched.

When the moving and hardening apparatus 101 moves in the direction of arrow K and the first heating coil 10 finishes passing one end Wa of the rod-shaped workpiece W, the energization of the composite heating coil 50 is stopped, In addition, the slow cooling jacket 72 has one end Wa of the rod-shaped workpiece W.
When the passage of No. 3 is finished, the injection of the quenching liquid Q and the quenching liquid S is stopped. Then, when the moving and hardening apparatus 101 arrives at the original first standby position shown by the dotted line, the rotation of the rod-shaped workpiece W and the moving and hardening apparatus 101 are stopped, and then the center 1
, 2 are retracted and the rod-shaped workpiece W is removed. Below 3
The second, fourth, ... Rod-shaped workpieces W are respectively 1
It can be quenched similarly to the first and second rod-shaped works W.

In quenching the work peripheral surface W2 of a large number of rod-like works W by the moving quenching apparatus 101 of this embodiment, the frequency of the high frequency current used for the main heating is 100 kHz during heating.
Since it is preheated by a high frequency current of a lower frequency of 10 kHz, the preheating depth of the work peripheral surface W2 is deeper than the main heating depth. As a result, sufficient preheating is performed on the rod-shaped work W, resulting in main heating. At this time, since the work is uniformly heated over a predetermined depth of the work peripheral surface W2, the formed hardened layer W3 becomes extremely homogeneous and preheating is performed to increase the speed of moving hardening. You can

During cooling, the work peripheral surface W2 heated by the comparatively small amount of the quenching liquid Q ejected from the quenching jacket 61 with a strong ejection force is rapidly heated to, for example, approximately Celsius.
After being cooled to 350 ° C, the relatively large amount of quenching liquid S ejected from the slow cooling jacket 62 with a weak ejection force gradually cools not only the work peripheral surface W2 but also the inside, for example, to approximately 150 ° C. Since this is performed, a good hardened layer W3 is formed without supercooling and quenching cracks.

When quenching the next rod-shaped work W, the moving and quenching device 101 is moved in the direction opposite to the moving direction when quenching the first rod-shaped work W to move the next rod-shaped work W.
Can be quenched. Therefore, unlike the conventional moving and hardening apparatus for a rod-shaped work, after the hardening of the first rod-shaped work W is completed, the moving and hardening apparatus 101 is used to prepare for hardening the next rod-shaped work W. Since it is not necessary to return the W to the first standby position A before the start of quenching, the overall quenching work time can be shortened.

When one end portion and / or the other end portion of the rod-shaped work W is not quenched, the moving quenching device 10
1 to the first and second quenching standby positions A and B, which are necessarily shown by dotted lines in FIG. 4 (that is, the moving quenching device 101 is located at the center 1).
, 2) until the first composite jacket 60 or the second composite jacket 70 has finished passing through the hardened portion of the work peripheral surface W2 (however, the composite heating coil 50 is located at the center 1). (Or it must be outside 2), the moving hardening device 101 is stopped.
Since the moving distance of 101 can be shortened, the entire quenching work time can be shortened when the end portion is not quenched.

In the moving quenching apparatus 101, the heating conductors 11, 21, 12, and 22 for generating an induced current in the direction of the axis W1 of the work peripheral surface W2 are 90 degrees in the circumferential direction of the rod-shaped work W. The shaft core wire W1
Since the heating of the work peripheral surface W2 by the induced current in the direction of and the stop of this heating are performed at regular intervals in the circumferential direction of the rod-shaped work W, the heating effect becomes large. It can be said that it is particularly suitable for quenching the peripheral surface of the rod-shaped work W that cannot be rotated at a very high speed.

Next, an embodiment of the moving hardening apparatus according to claim 2 will be described. 5 and 6 are drawings for explaining the present embodiment, FIG. 5 (a) is a schematic perspective view of a heating coil in the present embodiment, and FIG. 5 (b) is a shaft of a rod-shaped work W. FIG. 6 is an explanatory view of the arrangement of the heating conductors of the composite heating coil as viewed from the core wire direction, and FIG. 6 is an explanatory view of the moving and quenching method for the rod-shaped work by the moving and quenching apparatus of this embodiment.

As shown in FIGS. 5 (a) and 6, the moving quenching apparatus 102 of the present embodiment is similar to the moving quenching apparatus 101 in the first and second composite jackets 60, 70 and the moving means 80. However, since the composite heating coil is different, only the composite heating coil will be described below. As shown in FIG. 5, the composite heating coil 50A of the present embodiment is a moving hardening apparatus.
The first and second heating coils 10 and 20 of the composite heating coil 50 of 101
And the first and second heating coils 10A and 20A respectively corresponding to.

The first heating coil 10A is the first heating coil 10
First heating conductors 11, 12, second heating conductors 13, third heating conductors of
The first heating conductors 11A and 12A, the second heating conductor 13A, the third heating conductors 14A and 15A, and the first lead conductors 16A and 17 that correspond to the first and second lead conductors 16 and 17, respectively.
Equipped with A.

The second heating coil 20A has the fourth heating conductors 21 and 22, the fifth heating conductor 23, the sixth heating conductors 24 and 25, and the second lead conductors 26 and 27 of the second heating coil 20, Corresponding fourth heating conductors 21A, 22A and fifth heating conductor 23, respectively
A, sixth heating conductors 24A, 25A, and second lead conductor 26
Equipped with A and 27A. However, the second and fifth heating conductors 13
A and 23A have a 1/3 arc shape, and the third heating conductors 14A and 15A
A and the sixth heating conductors 24A and 25A have a 1/6 arc shape.

Then, as shown in FIG. 5B, the first heating conductor 11A and the fourth heating conductor 21A are arranged 60 degrees apart from each other when viewed from the direction of the axis W1. ing. Therefore, the first heating conductor 12A and the fourth heating conductor 22
Since A, the first heating conductor 11A, and the fourth heating conductor 21A are arranged at intervals of 60 degrees in the circumferential direction of the rod-shaped work W, the first heating conductor 12A of the first heating coil 10A and the second heating conductor 12A are heated. Since the coil 20A is arranged 180 degrees apart from the fourth heating conductor 21A, the composite heating coil 50A is a semi-open type.

As described above, the moving quenching apparatus 101 was particularly suitable for quenching the rod-shaped work W that cannot be rotated at a very high speed, but the moving quenching apparatus 102 of this embodiment is Since the heating conductors 12A, 22A, 11A, and 21A that generate an induced current in the direction of the axis W1 of the work peripheral surface W2 are arranged at intervals of 60 degrees in the circumferential direction of the work W, The heating by these heating conductors during the rotation and the stop of the heating are not performed at constant intervals in the circumferential direction of the rod-shaped work W, so that the heating of the work peripheral surface W2 becomes slightly uneven, but this is not a problem for practical use. .

Hardening of the rod-shaped work W by the moving hardening device 102 can be carried out in substantially the same manner as by the moving hardening device 101. The use of such a composite heating coil 50A has the following advantages. For example, as shown in FIG. 6, one end portion W5 and the other end portion W of the rod-shaped work W are
When 6 is not hardened respectively by the length L, the moving hardening device 102 is arranged at the first standby position A in FIG. It is not necessary to move it to the second standby position B, but it is sufficient to move it from the first standby position A1 shown in FIG. 6 to the second standby position B1.

That is, at the standby positions A1 and B1, the composite heating coil 50A of the moving and hardening apparatus 102 is arranged close to one end portion W5 or the other end portion W6 of the rod-shaped workpiece W, but Since the heating coil 50A is a semi-open type as described above, the rod-shaped work W is
It is possible to remove the rod-shaped work W by approaching to, or attach the next rod-shaped work W to the centers 1 and 2.

As described above, the moving and quenching apparatus 102 can substantially enjoy the advantages of the moving and quenching apparatus 101, and even if the moving and quenching apparatus 102 is at any position with respect to the rod-shaped workpiece W, Since the rod-shaped workpiece W can be removed and attached by approaching the rod-shaped workpiece W, the moving range of the moving and quenching apparatus 101 can be set to the minimum range required for quenching, and as a result, the overall quenching work time can be shortened. it can.

Next, an embodiment of a high frequency induction hardening apparatus for a rod-shaped work according to claim 3 will be described. 7A and 7B are drawings for explaining the present embodiment. FIG. 7A is a schematic perspective view of the heating coil in the present embodiment, and FIG. 7B is a view from the axial center line direction of the rod-shaped workpiece W. It is an arrangement explanatory view of the heating conductor of the heating coil seen.

The moving and quenching apparatus 103 of the present embodiment includes first and second composite jackets 60, 70 and moving means 80 (not shown) corresponding to the first and second composite jackets 60 and 70 of the moving and quenching apparatus 101, and moving. Means are provided, except that only one high frequency power supply H3 is provided and one heating coil is provided instead of the composite heating coil.

Therefore, only the heating coil will be described below. As shown in FIG. 7, the heating coil 30 of this embodiment is
The first and second heating coils 10 and 20 of the composite heating coil 50 of the moving and hardening apparatus 101 are similar in shape to each other, respectively.
It has a heating coil piece 301 and a second heating coil piece 302.

The first heating coil piece 301 is composed of a pair of linear first heating conductors 31 and 32 arranged in parallel with the axis W1.
A second heating conductor 33, which is connected between one ends of the first heating conductors 31 and 32 and has a cutting point 331, and which has a ½ arc shape, and a first heating conductor.
It has a pair of third heating conductors 34 and 35 in the shape of a quarter arc connected to the other ends of 31 and 32, respectively. Second heating coil piece 30
Reference numeral 2 denotes a pair of linear fourth heating conductors 41, 42 arranged in parallel with the axis W1 and a fifth arc-shaped fifth heating connecting one ends of the fourth heating conductors 41, 42. Conductor 43 and fourth at one end
A sixth arc-shaped sixth heating conductor 44 connected to the other end of the heating conductor 41 and having the other end before the other end of the fourth heating conductor 42 is provided. A cutting point 441 of the sixth heating conductor 44 is formed between the other end of the sixth heating conductor 44 and the other end of the fourth heating conductor 42.

The cutting point 331 of the second heating conductor 33 of the first heating coil piece 301 and the cutting point 441 of the sixth heating conductor 44 of the second heating coil piece 302 are connected by a pair of connecting conductors 45 and 46. ing. In this embodiment, the connection conductor 46 and the fourth heating conductor 42 are arranged on one straight line. Also, the first
The ends of the pair of third heating conductors 34, 35 of the heating coil piece 301 are connected to the high frequency power supply H3 via the pair of lead conductors 36, 37, respectively. The first heating conductor 31 and the fourth heating conductor 41 are arranged 90 degrees apart in the circumferential direction of the rod-shaped work W. Therefore, the first heating conductor 31, the fourth
The heating conductor 41, the first heating conductor 32, and the fourth heating conductor 42 are arranged at intervals of 90 degrees in the circumferential direction of the rod-shaped work W.

The moving hardening apparatus 103 of this embodiment is used for moving hardening of the work peripheral surface W2 of a rod-shaped work W.
The quenching can be performed by a procedure almost similar to that of the quenching by the above method, and the same advantages as those by the moving quenching apparatus 101 can be obtained. Since there is only one high frequency power source, the preheating by the first heating coil piece 301 or the second heating coil piece 302 on the work peripheral surface W2 has the same frequency as the main heating by the second heating coil piece 302 or the first heating coil piece 301. The preheating depth will be the same as the main heating depth,
The advantage of preheating, that is, the main heating without unevenness and the advantage of increasing the quenching moving speed are maintained.

Next, an embodiment of the high-frequency moving and quenching apparatus for a rod-shaped work according to claim 4 will be described. 8A and 8B are drawings for explaining the present embodiment. FIG. 8A is a schematic perspective view of the heating coil in the present embodiment, and FIG. 8B is a view from the axial center line direction of the rod-shaped workpiece W. It is an arrangement explanatory view of the heating conductor of the heating coil seen.

The mobile hardening apparatus 104 of this embodiment, like the mobile hardening apparatus 103, includes one high frequency power source H3, the first and second composite jackets 60 and 70 of the mobile hardening apparatus 101, and the moving means 80. Although the first and second composite jackets (not shown) and moving means corresponding to
Since the heating coil is different from that, only the heating coil will be described below. As shown in FIG. 8, the heating coil 30A of the present embodiment has first and second heating coil pieces 301, 301 respectively corresponding to the first and second heating coil pieces 301, 302 of the heating coil 30 of the moving hardening apparatus 103. A, 302 A.

The first heating coil piece 301A is a moving hardening device.
The first heating conductors 31 and 32, the second heating conductor 33, the cutting point 331, the third heating conductors 34 and 35, and the lead conductors 36 and 37 of the first heating coil piece 301 of 103 respectively correspond to the first heating conductors. Conductors 31A, 32A, second heating conductor 33A, cutting point 331A, third
It comprises heating conductors 34A, 35A and lead conductors 36A, 37A.

Further, the second heating coil piece 302 A is the fourth heating conductor 41, 4 of the second heating coil piece 302 of the moving hardening apparatus 103.
2, fifth heating conductor 43, sixth heating conductor 44, and cutting point 441
To the corresponding fourth heating conductors 41A, 42A, fifth heating conductor 43A, sixth heating conductor 44A, and cutting point 441, respectively.
Equipped with A. Further, the heating coil 30A is provided with connecting conductors 45A and 46A corresponding to the connecting conductors 45 and 46 of the heating coil 30 of the moving hardening apparatus 103. However, the second, fifth, and sixth
The heating conductors 33A, 43A, 44A have a 1/3 arc shape, and the third
The heating conductors 34 and 35 have a 1/6 arc shape.

Then, as shown in FIG. 8B, the first heating conductor 31A and the fourth heating conductor 41A are arranged 60 degrees apart from each other when viewed from the direction of the axis W1. ing. Therefore, the first heating conductor 32A and the fourth heating conductor 42
Since A, the first heating conductor 31A, and the fourth heating conductor 41A are arranged at intervals of 60 degrees in the circumferential direction of the rod-shaped work W, the first heating conductor 32A of the first heating coil piece 301A and the first heating conductor 32A The two heating coil pieces 302A are arranged 180 degrees apart from the fourth heating conductor 41A, and the heating coil 30A is a semi-open type.

The moving quenching apparatus 104 of this embodiment can quench the rod-shaped work W in a procedure substantially similar to that of the moving quenching apparatus 102. Further, as described above, since the heating coil 30A and the first and second composite jackets are all semi-open type, the moving range of the moving hardening device 104 as well as the moving hardening device 102 is the minimum necessary for hardening. Since it can be limited to the limited range, the quenching time of the entire rod-shaped work W can be shortened.
Further, as with the moving and quenching apparatus 103, the main heating can be performed uniformly, and the quenching moving speed can be increased.

In each of the above embodiments, the moving and quenching device is moved by the moving means in the direction of the axis W1 of the rod-shaped work W, but the rod-shaped work W is moved in the axis W1.
May be moved in the direction of.

In the above embodiment, the shape of the heating conductors arranged in the circumferential direction of the rod-shaped work W is 1/2, 1/3, 1 /.
Although it has a 4 or 1/6 arc shape, it can have a substantially 1/2, 1/3, 1/4, and 1/6 arc shape, respectively. Then, the mobile hardening apparatus 101
In the first heating conductor 11 and the fourth heating conductor 21,
Also in the moving quenching apparatus 103, the first heating conductor 31 and the fourth heating conductor 41 are arranged at intervals of 90 degrees in the work circumferential direction, but they can be set to approximately 90 degrees.

Further, in the moving quenching apparatus 102, the first heating conductor 11A and the fourth heating conductor 21A are separated by 60 in the work circumferential direction.
Although they are spaced apart, they can be approximately 60 degrees. However, the length of the arc-shaped heating conductor and the length of the first heating conductor 11A and the fourth heating conductor are set so that the distance between the first heating conductor 12A and the fourth heating conductor 21A in the work circumferential direction is at most 180 degrees.
The interval with 21A is selected. Similarly, the mobile hardening device 104
In, the first heating conductor 31A and the fourth heating conductor 41A are
The workpieces are arranged at intervals of 60 degrees in the circumferential direction, but can be set to about 60 degrees. However, the length of the arc-shaped heating conductor and the length of the first heating conductor 31A are set so that the distance between the first heating conductor 32A and the fourth heating conductor 41A in the work circumferential direction is at most 180 degrees.
The distance between A and the fourth heating conductor 41A is selected.

[0061]

As described above, in the high-frequency moving hardening apparatus for a rod-shaped work according to the first aspect, two so-called semi-openings provided as a composite heating coil are provided close to the outer peripheral surface of the rod-shaped work W. It has a saddle-shaped heating coil, and the heating conductors in the axial direction of each heating coil are arranged at intervals of about 18 in the circumferential direction.
It is set to 0 degrees. Further, these two half-open saddle type heating coils are arranged so as to be adjacent to each other in the direction of the axis of the rod-shaped workpiece W and at 90 degrees in the circumferential direction. When moving and quenching the rod-shaped workpiece W, the heating coil on the opposite side to the advancing direction is supplied with a high-frequency current of a predetermined frequency to perform main heating, and the heating coil on the advancing direction side is provided with the predetermined amount. Apply a high frequency current of a frequency lower than the frequency,
Since the preheating is performed over a range deeper than the main heating depth, the main heating can be performed extremely evenly, and the moving quenching speed can be increased.

A pair of composite jackets consisting of a quenching jacket and a slow cooling jacket are provided on both sides of the composite heating coil in the axial direction, and the work jacket is surrounded by a quenching jacket that strongly ejects a relatively small amount of quenching liquid. Quenching until the surface W2 reaches the martensitic transformation point of about 350 degrees Celsius, and thereafter, not only the work peripheral surface W2 but also the inside of the rod-shaped workpiece W is gradually cooled to a relatively large amount of about 150 degrees Celsius. Since it is performed by the slow cooling jacket that weakly ejects the quenching liquid, even if the moving quenching speed is increased, sufficient and appropriate cooling is performed and quenching cracks do not occur.

By providing a pair of composite jackets on both sides of the composite heating coil, the reciprocating movement quenching of the rod-shaped work can be performed. Therefore, after quenching one rod-shaped work, the next work is quenched. Previously, it is not necessary to return the moving hardening device to the position before the start of hardening of the first work, and the moving hardening device completes hardening of the rod-shaped work and moves in the opposite direction from the position where it passed the work end. Since the next bar-shaped work can be quenched, the total working time for moving and hardening a large number of bar-shaped works can be shortened.

According to a second aspect of the present invention, there is provided a high-frequency moving quenching apparatus for a rod-shaped workpiece, wherein the so-called semi-open saddle type heating coil of the high-frequency moving quenching apparatus for a rod-shaped workpiece according to the first aspect has a shaft of each heating coil. Since the spacing between the heating conductors in the core wire direction in the circumferential direction is approximately 120 degrees, the composite heating coil is also a semi-open saddle type. Therefore, the advantages of the high-frequency moving quenching apparatus for a rod-shaped workpiece according to claim 1 can be substantially enjoyed, and the rod-shaped workpiece supported at the quenching position with the moving quenching apparatus closely facing the rod-shaped workpiece is supported from below. Since it can be removed or attached, the moving range of the moving and quenching device does not need to consider interference with the work of the composite heating coil, and can be set to the minimum range required for quenching. Quenching time can be shortened.

According to a third aspect of the present invention, there is provided a high-frequency moving quenching apparatus for a rod-shaped workpiece, wherein the first heating coil and the second heating coil are connected in series to each other. The preheating and the main heating are performed with a high frequency current of the same frequency. Then, by performing the preheating, the main heating can be performed uniformly, and the moving heating speed can be increased. Further, since the pair of composite jackets are provided on both sides of the heating coil, the same cooling effect as the moving quenching apparatus according to the first aspect can be obtained. Further, the quenching work time can be shortened similarly to the moving quenching apparatus according to the first aspect.

The induction-hardening apparatus for induction hardening of rod-shaped workpieces according to claim 4 can enjoy the advantages of the moving-and-quenching apparatus according to claim 2 and the advantages of the moving-and-quenching apparatus according to claim 3 together. it can.

[Brief description of drawings]

FIG. 1 is a schematic structural explanatory diagram of an embodiment of the invention described in claim 1.

FIG. 2 is a schematic perspective view of the composite heating coil shown in FIG.
(B) is a layout view of the heating conductors of the composite heating coil viewed from the axial direction of the rod-shaped workpiece.

3A is a perspective view of a quenching jacket, FIG. 3B is a perspective view of an annealing jacket, and FIG. 3C is a perspective view of a nozzle.
(D) is a front explanatory view of the slow cooling jacket.

FIG. 4 is an explanatory diagram of a method of moving and quenching a rod-shaped work according to an embodiment of the invention described in claim 1.

5A is a schematic perspective view of a heating coil according to an embodiment of the invention described in claim 2, and FIG. 5B is an explanatory view of the arrangement of heating conductors of a composite heating coil viewed from the axial direction of the rod-shaped work. Is.

FIG. 6 is an explanatory view of a method of moving and quenching a rod-shaped work according to an embodiment of the invention described in claim 2;

FIG. 7 (a) is a schematic perspective view of a heating coil according to an embodiment of the present invention, and FIG. 7 (b) is an explanatory view of the arrangement of heating conductors of a composite heating coil viewed from the axial direction of the rod-shaped work. Is.

FIG. 8A is a schematic perspective view of a heating coil according to an embodiment of the invention described in claim 4, and FIG. 8B is an arrangement explanatory view of a heating conductor of a composite heating coil viewed from the axial direction of the rod-shaped work. Is.

FIG. 9 is a vertical cross-sectional explanatory view of a conventional moving and quenching device for a rod-shaped work and the rod-shaped work.

[Explanation of symbols]

10, 20, 30, 10A, 20A, 30A Heating coils 11-15, 21-25, 31-35, 41-45, 11A-15A, 21A-
25A, 31A to 35A, 41A to 45A Heating conductor 16, 17, 26, 27, 16A, 17A, 26A, 27A Lead conductor 50, 50A Composite heating coil 60, 70 Composite jacket 61, 71 Rapid cooling jacket 62, 72 Slow cooling jacket 80 Moving means 90 Circuit switching device 101-104 Moving hardening device H1-H3 High frequency power supply W Rod-shaped work W1 Shaft core wire W2 Work peripheral surface W3 Hardened layer

Claims (4)

[Claims] 1. A high-frequency moving hardening apparatus for a rod-shaped workpiece rotating around a longitudinal axis, wherein a first high-frequency power source, a second high-frequency power source having a frequency different from that of the first high-frequency power source, and a rod-shaped workpiece are used. A composite high-frequency heating coil provided with first and second high-frequency heating coils of the same shape which are arranged close to the peripheral surface and heat the peripheral surface, and the composite high-frequency heating coil arranged on both sides of the composite high-frequency heating coil in the axial center line, respectively. The first and second composite jackets of the same shape for ejecting the quenching liquid on the circumferential surface, the composite high frequency heating coil, and the first and second composite jackets are integrally moved in the direction of the axis, or
A first high-frequency heating coil, comprising a pair of linear first heating conductors arranged parallel to the shaft core, and a first heating unit. A second heating conductor having an approximately 1/2 arc shape connecting the ends of the conductor to each other, and a pair of third heating conductors having an approximately 1/4 arc shape connected to the other end of the first heating conductor, respectively, A pair of first lead conductors connected to the third heating conductor and having the other end connected to the first or second high-frequency power source via the circuit switching means, and the second high-frequency heating coil has the shaft core wire. A pair of linear fourth heating conductors arranged in parallel with each other, a fifth heating conductor having a substantially arc shape connecting one end of the fourth heating conductor, and the other end of the fourth heating conductor. Almost 1 connected each
/ 4 arc-shaped pair of fifth heating conductors, one end of which is connected to the fifth heating conductor, and the other end of which is connected to the first or second high-frequency power source via the circuit switching means. A lead conductor, the first heating conductor and the fourth heating conductor are arranged at an interval of about 90 degrees in the circumferential direction of the rod-shaped workpiece, and the first and second composite jackets are respectively provided with composite high-frequency heating. Arranged next to the coil, the jetting force of the quenching liquid is strong, and it is arranged on the side of the anti-composite high-frequency coil of the semi-annular quenching jacket that quenches the rod-shaped work with a relatively small amount of liquid and the quenching jacket. A high-frequency moving quenching device for a rod-shaped work, characterized in that the jetting force of the quenching liquid is weak, and that the rod-shaped work is gradually cooled with a relatively large amount of liquid. 2. A high-frequency moving hardening apparatus for a rod-shaped workpiece rotating around a longitudinal axis in a longitudinal direction, comprising: a first high-frequency power source; a second high-frequency power source having a frequency different from that of the first high-frequency power source; and a rod-shaped workpiece. A composite high-frequency heating coil provided with first and second high-frequency heating coils of the same shape which are arranged close to the peripheral surface and heat the peripheral surface, and the composite high-frequency heating coil arranged on both sides of the composite high-frequency heating coil in the axial center line, respectively. The first and second composite jackets of the same shape for ejecting the quenching liquid on the circumferential surface, the composite high frequency heating coil, and the first and second composite jackets are integrally moved in the direction of the axis, or
A first high-frequency heating coil, comprising a pair of linear first heating conductors arranged parallel to the shaft core, and a first heating unit. An approximately 1/3 arc-shaped second heating conductor that connects one ends of the conductors, and a pair of approximately 1/6 arc-shaped third heating conductors that are respectively connected to the other ends of the first heating conductors A pair of first lead conductors connected to the third heating conductor and having the other end connected to the first or second high-frequency power source via the circuit switching means, and the second high-frequency heating coil has the shaft core wire. On the other end of the fourth heating conductor, and a pair of linear fourth heating conductors arranged in parallel with each other, a fifth heating conductor of approximately 1/3 arc shape connecting one ends of the fourth heating conductor, and the other end of the fourth heating conductor. Almost 1 connected each
/ 6 arc-shaped pair of fifth heating conductors, one end of which is connected to the fifth heating conductor, and the other end of which is connected to the first or second high-frequency power source via the circuit switching means. A lead conductor, the first heating conductor and the fourth heating conductor are arranged at an interval of about 60 degrees in the circumferential direction of the rod-shaped work, and the first and second composite jackets are respectively provided with composite high-frequency heating. Arranged next to the coil, the jetting force of the quenching liquid is strong, and it is arranged on the side of the anti-composite high-frequency coil of the semi-annular quenching jacket that quenches the rod-shaped work with a relatively small amount of liquid and the quenching jacket. A high-frequency moving quenching device for a rod-shaped work, characterized in that the jetting force of the quenching liquid is weak, and that the rod-shaped work is gradually cooled with a relatively large amount of liquid. 3. A high-frequency moving and quenching apparatus for a rod-shaped workpiece rotating around a longitudinal axis as a center, wherein a high-frequency power source and high-frequency heating for heating the peripheral surface are provided close to the peripheral surface of the rod-shaped workpiece. A coil, first and second composite jackets of the same shape, which are respectively arranged on both sides of the high-frequency heating coil in the axial direction of the axis, and jet a quenching liquid onto the peripheral surface, and the high-frequency heating coil, first and second composites A high-frequency heating coil is provided in parallel with the shaft core line, and a moving unit that moves the jacket integrally in the shaft core line direction or moves the rod-shaped work in the shaft core line direction. A pair of linear first heating conductors, and a second heating conductor having an approximately 1/2 arc shape connecting one ends of the first heating conductors,
A first heating coil piece having a pair of third heating conductors each having an approximately 1/4 arc shape connected to the other end of the first heating conductor, and a pair of straight lines arranged in parallel with the axis. Fourth of the state
Almost 1 connecting the heating conductor and one end of the 4th heating conductor
/ 2 arc-shaped fifth heating conductor, a second heating coil piece having a substantially arc-shaped fifth heating conductor that connects the other ends of the fourth heating conductors, a first heating coil piece and a first heating coil piece A pair of connecting conductors that connect the respective cutting points of the two heating coil pieces and connect the first heating coil piece and the second heating coil piece in series, one end to the third heating conductor and the other end to the high frequency power supply. And a pair of lead conductors connected to each other, the first heating conductor and the fourth heating conductor are arranged at an interval of about 90 degrees in the circumferential direction of the rod-shaped work, and the first and second composite jackets are , Each of which is arranged adjacent to the composite high-frequency heating coil, has a strong jetting force of the quenching liquid, and is a substantially semi-annular quenching jacket for quenching a rod-shaped work with a relatively small amount of liquid,
The quenching jacket is provided on the anti-composite high-frequency heating coil side, has a weak jetting force of the quenching liquid, and is equipped with a substantially semi-annular slow cooling jacket for gradually cooling the rod-shaped work with a relatively large amount of liquid. High-frequency moving quenching equipment for rod-shaped workpieces. 4. A high-frequency moving quenching apparatus for a rod-shaped workpiece rotating around a longitudinal axis as a center, wherein a high-frequency power source and high-frequency heating for heating the peripheral surface of the rod-shaped workpiece are provided close to the peripheral surface of the rod-shaped workpiece. A coil, first and second composite jackets of the same shape, which are respectively arranged on both sides of the high-frequency heating coil in the axial direction of the axis, and jet a quenching liquid onto the peripheral surface, and the high-frequency heating coil, first and second composites A high-frequency heating coil is provided in parallel with the shaft core line, and a moving unit that moves the jacket integrally in the shaft core line direction or moves the rod-shaped work in the shaft core line direction. A pair of linear first heating conductors, and an approximately ⅓ arc-shaped second heating conductor that connects one ends of the first heating conductors to each other,
A first heating coil piece having a pair of substantially ⅙ arc-shaped third heating conductors respectively connected to the other ends of the first heating conductors, and a pair of straight lines arranged parallel to the axis. Fourth of the state
Almost 1 connecting the heating conductor and one end of the 4th heating conductor
Second heating coil piece having a third arc-shaped fifth heating conductor and a substantially third arc-shaped fifth heating conductor that connects the other ends of the fourth heating conductors to each other, the first heating coil piece and the first heating coil piece. A pair of connecting conductors that connect the respective cutting points of the two heating coil pieces and connect the first heating coil piece and the second heating coil piece in series, one end to the third heating conductor and the other end to the high frequency power supply. The first heating conductor and the fourth heating conductor are arranged at a distance of about 60 degrees in the circumferential direction of the rod-shaped work, and the first and second composite jackets have a pair of connected lead conductors. , Each of which is arranged adjacent to the composite high-frequency heating coil, has a strong jetting force of the quenching liquid, and is a substantially semi-annular quenching jacket for quenching a rod-shaped work with a relatively small amount of liquid,
A semi-annular gradual cooling jacket which is disposed on the anti-composite high-frequency heating coil side of the quenching jacket, has a weak jetting force of the quenching liquid, and gradually cools the rod-shaped work with a relatively large amount of liquid. High-frequency moving quenching device for rod-shaped workpieces.