JPH10219357A - Method for induction-heating and hardening gear and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an induction heating and hardening method of a gear which can uniformly be hadened even if tooth form is deformed, in the induction heating and hardening of the gear for hardening tooth one by one with the interval having every arbitrary tooth, and a device therefor. SOLUTION: This device is provided with an induction heating coil inserted into a tooth groove of the gear W to be hardened to heat tooth surfaces at both sides of the tooth groove and a tooth bottom, non-contacting detecting means 12, 13 to tooth top and tooth surface fitted so as to link with this induction heating coil. The tooth is hardened by relatively shifting the gear W to be hardened with the induction heating coil while holding gap values F, H between the detecting means 12, 13 and the tooth top and the tooth surface of the gear W to be hardened to the fixed value. At this time, a CPU' for driving a driving means based on inputted information of the various dimensions of the gear to be hardened and the signals of the gap values F, H introduced from the detecting means 12, 13.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction heating quenching apparatus for quenching gears one by one by induction heating.

[0002]

2. Description of the Related Art In induction heating and quenching of large gears, the teeth are often hardened one by one (for example, Japanese Utility Model Publication No. Sho 62-5035). In such tooth quenching, an induction heating coil is usually inserted into the tooth space to quench the tooth surfaces and the tooth bottom on both sides of the tooth space, and this operation is repeated at intervals of an arbitrary number of teeth to make one revolution. After the quenching, the quenching of all teeth is completed by quenching the second non-quenched tooth space at intervals of an arbitrary number of teeth. At this time, if the distance between the induction heating coil and the tooth surface of the gear to be processed (hereinafter referred to as a coil gap) is not accurately maintained, unevenness in quenching depth may occur or the induction coil may be damaged by contact with the gear to be hardened. There is.

[0003] On the other hand, the hardening of one lap quenching is performed at intervals to any number of teeth every tooth space T ₂ which is not hardened and tooth space T ₁ which is hardened as shown in FIG. 6
As a result, only one side of the tooth is hardened, so that the original tooth shape shown by the broken line is deformed to the shape shown by the solid line. Therefore, when quenching the tooth space T ₂ that has not been quenched in the first lap, in the second lap, a deviation occurs in the coil gap at the same coil position as in the first lap, resulting in uneven quenching depth,
In the worst case, the induction heating coil may come into contact with the tooth surface.

Conventionally, as shown in FIG. 7, for example, a method of inserting a copying roller 7 interlocked with an induction coil 11 into a tooth space and guiding the position of the induction heating coil 11 to perform quenching as shown in FIG. I have. Further, as an improvement, a device for detecting the position of the tooth surface by a contact type sensor instead of the copying roller 7 and moving the heating coil for quenching has been disclosed (Japanese Patent Publication No. 5-16156).

[0005]

However, in the copying roller system according to the conventional method, in the case of quenching of a helical gear, a large force in the rotation direction of the gear is applied to the roller when the roller enters the tooth space following the helical teeth. In addition, the helical gear uses two upper and lower tracing rollers in order to follow the helical (not shown in FIG. 7, but the helical gear has The roller 7 is used in two upper and lower positions along the teeth.) It is difficult to set these two copying rollers in parallel with the tooth space, and the outer diameter is distorted by heat treatment with a thin gear such as a ring gear. In such a case, there is a disadvantage that the position of the induction heating coil is shifted and the coil gap becomes unstable.

When a contact-type sensor is used, a force perpendicular to the axial direction of the sensor is applied when the sensor comes into contact with the gear to be quenched, and the sensor may be displaced. The probe may not be able to return to the sensor due to adhesion to the sensor, the surface roughness of the tooth surface may cause bounding, the probe of the sensor may be worn, and the accuracy of the coil setting position may not be accurate. There is a drawback that it is insufficient or hard to cope with hardening of a helical gear or a spiral gear. Accordingly, an object of the present invention is to provide a gear induction heating and quenching device which solves the above-mentioned problems and has a long life and is maintenance-free.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the method of induction heating and quenching a gear according to the present invention is applied to the induction heating and quenching of a gear that is quenched one tooth at a time at an arbitrary number of teeth. An induction heating coil that fits into the tooth space of the quenched gear and heats the tooth surfaces and roots on both sides of the tooth space, and a non-contacting gear that is mounted so as to interlock with the induction heating coil. A crest value between the crest detection means and the crest surface of the hardened gear and a crevice between the crest detection means and a tooth surface of the hardened gear; The quenched gear is moved relatively to the induction heating coil while the value is kept constant to quench the teeth.

That is, according to the method of the present invention, the induction heating coil fitted into the tooth space of the gear to be hardened heats the tooth surfaces and the tooth bottoms on both sides of the tooth space one by one tooth space and hardens at every arbitrary number of teeth. At this time, the tooth crest detecting means and the tooth surface detecting means interlocking with the induction heating coil detect the gap value between the tooth crest surface and the tooth surface of the hardened gear and the gap value between the tooth surface, respectively. The quenched gear is moved and quenched while maintaining the constant so that the induction heating coil moves along the distorted shape even if the tooth profile is distorted from the design value, and the induction heating coil and the quenched gear (Hereinafter referred to as a coil gap) is kept constant during heating. Therefore, there is no change in the quenching depth, and the coil does not contact the tooth surface. Also,
Since the tooth crest detecting means and the tooth surface detecting means detect the gap without contacting the gear, the position of the induction heating coil is accurate and the correspondence is excellent.

Further, the gear induction heating and quenching device of the present invention is a gear induction heating and quenching device for quenching one tooth at a time at intervals of an arbitrary number of teeth. Between the induction heating coil for heating the tooth surface and the tooth bottom on both sides of the tooth space, and the gap value between the tooth top surface and the tooth surface of the quench-hardened gear mounted so as to interlock with the induction heating coil. A non-contact crest detecting means and a tooth surface detecting means for detecting gap values, respectively, and guiding the quenched gear while maintaining a gap value with the crest surface and a gap value with the tooth surface constant. Moving means for moving relatively to the heating coil.

That is, according to the induction heating and quenching apparatus of the present invention, the cusp detecting means and the flank detecting means are provided in conjunction with the induction heating coil. And the gap value between the tooth surface and the tooth surface is detected, and the quenched gear is moved while the gap value is kept constant by the moving means, and the tooth surfaces on both sides are moved by the induction heating coil fitted into the tooth space. The roots are heated and quenched one tooth at a time. Therefore, even when the tooth profile is distorted from the design value, the induction heating coil moves along the distorted shape, so that the coil gap is kept constant during heating. Therefore, it is possible to prevent an accident in which the quenching depth becomes constant and the coil contacts the tooth surface of the coil. In addition, since the crest detection means and the tooth surface detection means of the device of the present invention detect a gap without contacting the gear, the accuracy of the induction heating coil position is higher than that of a conventional copying roller or a contact type sensor, Excellent responsiveness.

The induction heating and quenching apparatus according to the present invention further comprises: an induction heating coil which fits into the tooth space of the gear to be hardened and heats the tooth surfaces and the tooth bottom on both sides of the tooth space; A non-contact crest detecting means and a tooth surface detecting means for detecting a gap value with a tooth crest surface and a gap value with a tooth surface of the gear to be hardened, respectively, A table on which a gear is mounted and which can be rotated forward and reverse, and moving means in the front and rear X direction, the left and right Y direction and the up and down Z direction on a plane for relatively moving the relative position between the quenched gear and the induction heating coil And X, Y, Z, and R driving means for moving the moving means in the X, Y, and Z directions and driving the table for R rotation, and the gap value with the tooth top surface and the gap value with the tooth surface. The quenched gear is relatively moved with respect to the induction heating coil while maintaining the gear constant. Wherein X, Y, is obtained by a control means for controlling the Z and R drive means.

That is, the induction heating and quenching apparatus of the present invention comprises a table which is rotatable forward and backward R driven by a driving means, and a plane which relatively moves a relative position between the quenched gear and the induction heating coil. A burner mounted on a table, provided with upper and lower X-direction, left-right Y-direction and up-down Z-direction moving means, and non-contact tooth crest detecting means and tooth surface detecting means interlocked with the induction heating coil; The gap value between the tooth crest and the tooth surface of the input gear is detected, and the table and the induction heating coil are controlled by X and X so that the gap value is constant by the control means.
Since Y, Z, and R driving are performed, the coil gap during quenching heating is always constant, and uniform quenching can be performed. The X, Y, Z moving means may move the induction heating coil, may move the rotary table, or a combination thereof, so that the relative position between the heated gear and the induction heating coil is relatively large. It is only necessary to be able to change and move it.

The control means includes input means for inputting gear specifications such as the number of teeth of the gear to be quenched, a module, a pitch circle diameter, a tooth width, and a torsion angle of teeth and heat treatment parameters such as a quenching heating rate. Storage means for storing the input information, and the X, Y, Z, and Z signals based on the information stored in the storage means and the gap value signals introduced from the crest detection means and the tooth surface detection means. It is desirable to have a CPU for driving the R driving means.

That is, according to the above-described configuration, it is only necessary to input the gear specifications such as the number of teeth of the gear to be quenched, the module, the pitch diameter, the tooth width, the torsion angle of the teeth, and the heat treatment parameters such as the quenching heating rate. The table and the like are driven by the storage means and the CPU so that the coil gap is kept constant in the case of a gear according to the design value, and is introduced from the crest detection means and the tooth surface detection means when the tooth profile is distorted. The table and the like are driven so that the coil gap is kept constant with respect to the distorted tooth profile based on the signal of the given gap value, so that quenching heating is performed with the coil gap kept constant for any tooth profile. Automatic gear quenching is easy.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to an embodiment shown in the drawings. FIG. 1 is a plan view showing a basic concept of a gear induction heating and quenching device of the present invention, FIG. 2 is a plan view of the entire gear induction heating and quenching device of the present invention, FIG. 3 is a side view of FIG. FIG. 3 is a block diagram illustrating a configuration of a control unit.

First, the overall structure of the gear induction heating and quenching apparatus of the present invention will be described with reference to these drawings. As shown in FIG.
The transformer 3 is mounted on the portal frame 2 so as to be driven to move in the vertical Z direction by a servomotor (Z driving means) 5. The transformer 3 has an induction heating coil 11
, And an induction current is supplied from the high frequency power supply 4.

On the base frame 1, a servo motor (X
An X table 21 is provided which is driven to reciprocate in the X direction of FIG. 2 by a driving means 31. A Y table which is driven to reciprocate in the Y direction by a servomotor (Y driving means) 32 is provided on the X table 21. The XY table 20 is mounted on the XY table 20. Further, the gear W to be processed is placed on the Y table 22 and R (not shown)
Rotary table 23 driven forward and reverse R rotation by drive means
Is installed. X, Y, and Z moving means are constituted by the XY table and the Z moving mechanism of the induction heating coil. Then, X,
The table and the induction heating coil are moved by driving means of Y driving, vertical Z driving of the induction heating coil, and R driving of the rotary table (hereinafter referred to as X, Y, Z, R driving), and the positions of the induction heating coil and the tooth shape are adjusted. Can be set arbitrarily. Therefore, in the case of a helical gear, for example, the rotary table 2
The induction heating coil can be moved along the helical tooth profile by moving the induction heating coil in the Z direction while driving the R in the R direction.

As shown in detail in FIG. 1, a crest sensor for detecting crevice values F and H between the crest surfaces of the arms 12a and 13a extended from the case of the transformer 3 (crest detection means). 12 and a tooth surface sensor (tooth surface detecting means) 13 are attached, and arms 12a and 13a are hinged 12b, 13
The position can be adjusted and fixed by b.
As the sensor, for example, the tooth crest sensor 12 has an overcurrent displacement sensor HA-101S manufactured by Sensor Technology Laboratory Co., Ltd.
-6145F type, tooth surface sensor 13 has HA-80
A non-contact type gap measuring device such as S-8417D type is used. These cusp sensor 12 and tooth surface sensor 13
As shown in the figure, are arranged so as to detect a gap value between a tooth crest and a tooth flank at intervals of one tooth space from a tooth space to be heated. This is shown in FIG.
Quenching of pitch circle diameter and tooth width is performed by quenching every other tooth, quenching one round, and then quenching the teeth in the second lap. This is for moving the induction heating coil so as to match.

FIG. 4 is a block diagram showing the structure of the control means 40. The gear number such as the number of teeth of the hardened gear W, the module, the torsion angle of the teeth, the pitch circle diameter and the tooth width, the quenching heating moving speed, and the like are input to the CPU 41 in advance by the input means 43 and stored in the storage means 42. Can be The CPU 41 moves the induction heating coil 11 following the tooth surface with a constant coil gap from the tooth space heated by the induction heating coil 11 based on the input gear specifications and the like.
Driving means 44 to 47 such as tables are driven by calculating X, Y, Z, R driving amounts and driving speeds of upper and lower X-Y table 20, rotary table 23 and induction heating coil.

Further, the CPU 41 inputs a signal of a gap value between the tooth crest sensor 12 and the tooth surface sensor 13, and moves the quench hardened gear such that the gap value is always kept at a constant value.
The Z and R drive amount signals are output to the drive means 44 to 47 to drive a table or the like.

Hereinafter, the operation of the gear induction heating and quenching apparatus of the present invention having the above-described structure will be described with reference to the flowchart of FIG. First, as a preparation stage, the gear W to be processed is mounted concentrically on the rotary table 23 and fixed (step 1). Next, the table is moved to a position where the induction heating coil 11 enters the upper part of one tooth space of the hardened gear W by driving the X, Y, Z, and R, and the induction heating coil 11 is moved using a gap gauge or the like. 11 and the gap G between the tooth surface and the tooth bottom on both sides of the tooth space
Is set to a predetermined value (for example, 0.5 mm) evenly. Then, the X, Y, Z, and R coordinates at this position are stored in the storage means 42 (step 2). Next, data such as the number of teeth of the gear to be processed, the module, the torsion angle of the teeth, the pitch circle diameter, the tooth width shape, etc., and the data such as the moving speed for heating the tooth space are input to the CPU 41 by the input means 43 of the control means 40. And store it in the storage means 42 (step 3).

Next, at this position, the hinges 12b and 13b of the arms 12a and 13a of the tooth apex sensor 12 and the tooth surface sensor 13 are adjusted so that the gap values F and The arms 12a and 13a are fixed so that H becomes a predetermined value (for example, 0.5 mm). (Step 4). Further, the induction coil 11 is moved to the standby position above the upper surface of the gear W, and the standby position coordinates are stored in the storage means 42 (step 5). Then, the data in step 3 is finely adjusted.

After the above-mentioned preparatory steps, the quenching operation is started. When the start button is pressed, the quenching operation starts (step 6), and the process enters the measurement stage. The CPU 41 is a storage unit 4
2, the driving means 44-4
7 so that the induction coil 11 moves downward along the tooth space to be hardened from the standby position through the XY table 2.
0, the rotary table 23 and the induction heating coil 11 are X,
Y, Z, and R drive is performed (step 7). This measuring step is performed from the upper side to the lower side of the gear.

At this time, the cusp sensor 12 and the tooth surface sensor 1
3 moves in conjunction with the induction coil 11, and as shown in FIG. 1, the gap values F, along the tooth crests and tooth surfaces of the teeth spaced one tooth from the tooth space into which the induction coil 11 is inserted, respectively. H
(Step 8). When the tooth profile has the accuracy as calculated (YES), the gap values F and H indicated by the cusp sensor 12 and the tooth surface sensor 13 are stored in the storage means 42 in agreement with the set values (for example, 0.5 mm). When the induction coil 11 reaches the bottom dead center below the tooth space, the table stops moving and the measurement stage ends (step 9).

When the heated tooth profile is distorted as shown in FIG. 6 (NO), the gap values F and H change when the quenched gear W moves as calculated. Then, the CPU drives the XY table 20 and the like in the X, Y, Z, and R directions in response to the signal of the variation of the gap value so that the gap value always becomes the set value and moves downward along the tooth space. Move (step 10). When the induction coil 11 reaches the bottom dead center below the tooth space, the movement of the table stops, and the measurement stage ends (step 9). Accordingly, even when the pitch circle diameter and the tooth width are distorted, the coil gap G between the induction heating coil 11 and the tooth space is moved so as to become a set value, and in the next quenching stage, the gear is set based on the stored value. Is moved, quenching heating is performed with the coil gap being constant even when the tooth profile is distorted.

When the measuring step is completed, a quenching step is started.
At the beginning of the quenching step, the induction heating coil 1
Reference numeral 1 denotes a bottom dead center of the tooth space, and quenching is performed from the lower part to the upper part of the tooth space. In this state, the induction coil 11
Is supplied with a high-frequency current from the transformer 3 (step 1).
1) The tooth surfaces and the tooth bottom on both sides of the tooth space are heated, and the X-Y table 20 and the like are reversed based on the values stored in the measurement stage.
Driven by Y, Z, and R, the induction coil 11 moves upward along the tooth space while heating the tooth surfaces and the tooth bottom on both surfaces of the tooth space (step 12). This upward movement is detected by the tooth crest sensor 12 and the tooth surface sensor 13 in the above-described measurement stage, and is driven and moved by the coordinate value in which the change is stored. However, the coil gap G between the induction coil 11 and the tooth space is heated while being kept at the set value, and quenching is performed by cooling with water.

When the induction heating coil 11 rises to reach the upper part of the tooth space and the entire tooth surface is hardened, the high-frequency current is cut off (step 13). The induction coil further rises, comes to a standby position on the upper surface of the gear, and stops (step 1).
4). Thus, the hardening operation of the first tooth space is completed (step 15).

Although the details are omitted, the gap value detection in step 10 is performed during the vertical movement of the induction coil from step 7 to step 13 and step 10 is performed.
Operation is continued.

When the quenching of the first tooth is completed, the rotation table 23 is moved to the second position by the gear information input to the storage means.
The tooth is rotated by the number of teeth, and the induction coil 11 comes to a standby position of the next hardened tooth space spaced by one tooth (step 16). And
The above operation is repeated to quench harden every other tooth (step 17). Next, the quenching of the unquenched tooth space is performed by the same operation to complete the quenching of all teeth. In the case of odd-numbered teeth, rotary quenching may be performed continuously, and in the case of even-numbered teeth, three teeth are started in the second round. Further, the above-described operation can be repeated every arbitrary number of teeth instead of every other tooth, and all teeth can be quenched while rotating by an arbitrary number of teeth.

All of the above operations can be performed automatically by computer control of the control means 40. In the first quenching, there is little error in the tooth profile, but in the second quenching, the tooth profile is deformed as shown in FIG. 6 described above. When heated, the gap of the induction coil fluctuates, and the quenching depth fluctuates. In the worst case, the coil comes into contact with the gear to be processed and is broken. As described above, in the gear quenching device of the present invention, as described above, since the heating is performed while the coil gap is kept constant by detecting the tooth crest and the tooth surface sensor, the above-described problem does not occur.

As described above, according to the gear induction heating method and apparatus of the present invention, the induction heating coil is inserted into the tooth space of the gear to be quenched, heated by one tooth space, and spaced at an arbitrary number of teeth. In case of quenching, the tooth crest detecting means and the tooth surface detecting means interlocked with the induction heating coil respectively detect the tooth crest surface and the gap value between the quenched gear and the gap value between the tooth surface, and this gap value is determined. The quenched gear is moved and quenched while keeping the gear constant. Therefore, even if the tooth form is distorted from the design value, the induction heating coil moves along the distorted shape,
The coil gap is kept constant during heating, there is no variation in quenching depth, and there is no contact of the coil with the tooth surface.
In addition, since the tooth crest detecting means and the tooth surface detecting means detect the gap without contacting the gear, the accuracy of the position of the induction heating coil is good and the responsiveness is excellent.

The induction heating and quenching apparatus according to the embodiment of the present invention includes an induction heating coil driven by driving means and capable of moving in X and Y directions and rotating in forward and reverse directions, an induction heating coil driven up and down Z, and an induction heating coil. By providing a non-contact tooth apex detecting means and a tooth surface detecting means interlocked with the coil, and a control means for driving X, Y, Z and R based on the gap value detected by the detecting means, Since the induction heating coil and the gear to be quenched can be relatively moved with the gap kept constant, the coil gap during quenching heating is always constant and uniform quenching can be performed. In this embodiment, the hardened gear on the rotary table is moved XY and rotated R to move the induction heating coil up and down Z. However, the hardened gear on the rotary table is rotated only R and induction heating is performed. X-Y coil
You may make it move -Z.

Further, the control means only inputs the gear specifications of the gear to be hardened, and the control means is introduced from the crest detecting means and the tooth surface detecting means even when the pitch circle diameter and the tooth width are deformed. The table is driven so that the coil gap is kept constant even for the tooth profile that is distorted based on the signal of the gap value, so quenching heating is automatically performed with the coil gap kept constant for any tooth profile. Automatic gear quenching is easy.

Although the hardening of the helical external gear has been described in the above embodiment, it can be applied to a straight gear, a screw gear, an internal gear and the like. It can also be applied to quenching tooth profiles such as spline shafts and serrations.

[0035]

As described above, according to the method and apparatus for induction heating and quenching a gear of the present invention, the induction heating coil is inserted into the tooth groove of the gear to be quenched, and the teeth on both sides of the tooth groove are inserted. When the surface and the tooth bottom are heated one by one tooth groove and quenched at an arbitrary number of teeth, the quenching heating is automatically performed while keeping the coil gap constant even for the deformed tooth shape,
Mass production is easy, gears having a uniform hardening depth can be hardened, and accidents such as contact of induction heating coils can be prevented.

[Brief description of the drawings]

FIG. 1 is a plan view showing the concept of a gear induction heating and quenching apparatus according to an embodiment of the present invention.

FIG. 2 is a plan view showing the overall configuration of the gear induction heating and quenching apparatus according to the embodiment of the present invention.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a block diagram showing a configuration of a control means of the gear induction heating and quenching apparatus according to the embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the gear induction heating and quenching device according to the embodiment of the present invention.

FIG. 6 is a diagram illustrating hardening deformation of a gear.

FIG. 7 is a view showing a follow-up mechanism of a conventional gear quenching device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base frame 2 Gate type frame 3 Transformer 4 High frequency power supply 5 Servo motor (Z drive means) 7 Copying roller 11 Induction heating coil 12 Tooth sensor (tooth sensor) 13 Tooth sensor (tooth sensor) 20 X -Y table 21 X table (moving means) 22 Y table (moving means) 23 Rotary table (moving means) 31 Servo motor (X driving means) 32 Servo motor (Y driving means) W Hardened gear

Claims (4)

[Claims] 1. In induction heating and quenching of a gear which is quenched one tooth at a time at an interval of an arbitrary number of teeth, the gear is fitted into a tooth space of a gear to be quenched to heat tooth surfaces and a tooth bottom on both sides of the tooth space. An induction heating coil, and a ridge detection means and a tooth surface detection means which are not in contact with the quenchable gear mounted so as to interlock with the induction heating coil. The quenched gear is moved relative to the induction heating coil while keeping the gap value between the gear tooth crest surface and the gap value between the tooth surface detection means and the tooth surface of the quenched gear constant. Induction hardening of gears, characterized by quenching teeth. 2. An induction heating and quenching device for a gear that quench one tooth at a time at an interval of an arbitrary number of teeth, wherein the tooth surface and the tooth bottom on both sides of the tooth groove are fitted into tooth spaces of a gear to be quenched. Non-contact root detection for detecting a gap value between a tooth crest and a tooth crest of the quench-hardened gear mounted so as to interlock with the induction heating coil. Means and a tooth surface detecting means, and a moving means for moving the quenched gear relatively to the induction heating coil while keeping a gap value with the tooth crest surface and a gap value with the tooth surface constant. An induction heating and quenching device for gears, comprising: 3. An induction heating coil that fits into the tooth space of the quench-hardened gear and heats the tooth surface and the tooth bottom on both sides of the tooth space, and the cover mounted so as to interlock with the induction heating coil. Non-contact cusp detecting means and flank detecting means for detecting the gap value with the cusp surface of the quenched gear and the gap value with the flank, respectively,
A table on which the hardened gear is mounted and which can be rotated forward and reverse R; and a front and rear X, a left and right Y direction, and a vertical Z on a plane which relatively moves a relative position between the hardened gear and the induction heating coil.
Direction moving means, X, Y, Z, and R driving means for moving the moving means in the X, Y, and Z directions and driving the table for R rotation; The X, Y, and X are moved such that the quenched gear is relatively moved with respect to the induction heating coil while maintaining a constant gap value.
The gear induction heating and quenching apparatus according to claim 2, further comprising control means for controlling the Z and R drive means. 4. An input means for inputting gear parameters such as the number of teeth of a gear to be quenched, a module, a pitch diameter, a tooth width, and a torsion angle of teeth and heat treatment parameters such as a quenching heating rate. Storage means for storing the input information, and the X, Y, Z, and Z signals based on the information stored in the storage means and the gap value signals introduced from the crest detection means and the tooth surface detection means. The gear induction heating and quenching device according to claim 3, further comprising a CPU that drives the R driving means.