JP6511286B2 - Quenching apparatus and method - Google Patents

Description

  The present invention relates to a quenching apparatus and a quenching method for quenching teeth of a toothed member one by one, and a cooling jacket used for the quenching apparatus.

  Quenching is applied to the teeth of toothed members such as gears and racks, and induction heating is used as one of the methods for heating teeth in quenching. The relatively large toothed members are generally hardened one by one.

  In the hardening of the tooth space of the toothed member, the base and side surfaces of the tooth space are inductively heated while the heating coil is moved along the tooth space. Then, the coolant jetted from the cooling jacket for quenching, which is moved integrally with the heating coil along the induction-heated tooth space, is applied to the tooth base and tooth side of the induction-heated tooth space to form one tooth space. Is hardened. The above hardening process for one tooth groove is repeated to harden all the tooth grooves.

  Here, the tooth spaces adjacent to the induction-heated tooth spaces may also be heated due to heat conduction, and if the adjacent tooth spaces have already been quenched, blunting may occur. In the quenching apparatus described in Patent Document 1, a blunting cooling jacket is provided, which is moved integrally with the heating coil along a pair of teeth that sandwich the induction heated tooth gap, and blunting is suppressed. The cooling fluid sprayed from the cooling jacket is applied to a region located on the side of the heating coil on the side of the tooth opposite to the top of the pair of teeth and the side of the tooth to be induction heated. The blunting of the hardened tooth space is suppressed.

Japanese Patent Application Laid-Open No. 61-79726

  In the case of hardening of the tooth space accompanied by the movement of the heating coil and the cooling jacket for quenching, the tooth base and the tooth side surface of the tooth space are induction heated from the quenching start side end of the tooth space toward the quenching end side Followed by heating followed by cooling. For this reason, the heating coil is moved beyond the end on the quenching end side of the tooth space. Therefore, in the quenching device described in Patent Document 1, the coolant injected from the blunting suppression cooling jacket may be applied to the end face on the end of quenching of the teeth.

  When the coolant injected from the cooling jacket for blunting is applied to the end face on the quenching end side of the teeth, the bottom surface and the tooth side face at the end on the quenching end side of the tooth groove are injected from the cooling jacket for quenching Before being cooled by the coolant, the coolant sprayed from the blunting cooling jacket cools the end of the quenching end. Therefore, when the bottom and side surfaces of the tooth groove are cooled by the coolant injected from the cooling jacket for hardening, there is a possibility that a crack may occur at the end of the tooth groove on the quenching end side.

  It is possible to suppress the cracking at the end of the quenching end side of the tooth groove by reducing the injection amount of the cooling liquid injected from the cooling jacket for blunting suppression or adjusting the injection direction of the cooling liquid When the injection amount is reduced, blunting of the groove adjacent to the induction heated groove is likely to occur, and adjustment of the injection direction requires the skill of the operator, which may impair the stability of the quenching quality. There is.

  The present invention has been made in view of the above-mentioned circumstances, and in a quenching apparatus and a quenching method for quenching teeth of a toothed member one by one, the quenching quality is stabilized and the quenching quality is improved. The purpose is that.

In the hardening device according to one aspect of the present invention, the base surface and the side surface of the tooth space are induction-heated while moving the heating coil along the tooth space of the toothed member, and the induction-heated tooth base surface of the tooth space And a quenching device for cooling the side surfaces of the teeth to harden the teeth one tooth at a time, wherein the tooth crests of the pair of teeth sandwiching the teeth and induction heated by the heating coil and the teeth A cooling unit including a plurality of injection units for injecting a coolant toward the tooth side opposite to the tooth side on the groove side in the moving direction of the heating coil, and integrally moving with the heating coil, and the cooling unit Controlling the injection of the cooling liquid from each of the injection units according to the movement of each of the injection units, and cooling from the injection units in which the injected cooling liquid exceeds the pair of teeth in the moving direction of the cooling unit And a controller configured to stop the injection of the liquid.

Further, according to the quenching method of one aspect of the present invention, the base surface and the side surface of the tooth groove are induction-heated while moving the heating coil along the tooth groove of the toothed member, and the induction-heated tooth groove is A quenching method of cooling a tooth bottom and a tooth side to harden the tooth groove one tooth at a time, and a pair of teeth sandwiching the tooth groove, having a plurality of injection parts in the moving direction of the heating coil. While integrally moving with the heating coil along a mountain, the sprayer directs the coolant from the jet portion toward the tooth flank of each of the pair of teeth and the tooth flank opposite to the tooth flank on the tooth groove side. The injection is performed, and the injection of the cooling fluid from the injection unit is controlled for each injection unit according to the movement of the cooling unit, and the injected cooling liquid exceeds the pair of teeth in the moving direction of the cooling unit. Stop the injection of coolant from the unit.

  According to the present invention, it is possible to stabilize quenching quality and to improve quenching quality in a quenching apparatus and a quenching method in which teeth of a toothed member are quenched one by one.

It is a side view of an example of a hardening device for describing an embodiment of the present invention. It is a top view which expands and shows the part enclosed with broken-line circle II in FIG. It is a block diagram which shows the structure of the hardening apparatus of FIG. It is a schematic diagram which shows the outline of the hardening method of the tooth space by the hardening apparatus of FIG. It is a top view of the hardening unit of the hardening apparatus of FIG. It is a side view of the hardening unit of the hardening apparatus of FIG. It is a front view of the hardening unit of the hardening apparatus of FIG. It is a rear view of the hardening unit of the hardening apparatus of FIG. It is a schematic diagram which shows the detail of the hardening method of the tooth space by the hardening apparatus of FIG.

  1 to 3 show an exemplary configuration of a hardening apparatus for describing an embodiment of the present invention.

  The hardening device 1 shown in FIGS. 1 to 3 is for hardening the tooth grooves of the internal gear ring gear 2 as a toothed member one by one.

  The hardening device 1 includes a rotary table 3 on which the internal gear ring gear 2 is mounted, a hardening unit 4 for hardening the tooth grooves of the internal gear ring gear 2, and a hardening unit 4 for the tooth grooves of the internal gear ring gear 2. It comprises a moving unit 5 that moves relative along the axis, and a control unit 6 that collectively controls the operation of each part of the hardening device 1.

  The internal gear ring gear 2 is mounted on the rotary table 3 with its central axis vertical and coaxial with the rotary shaft of the rotary table 3, and is fixed to the rotary table 3.

  The hardening unit 4 includes a heating coil 10 for induction heating the tooth bottom 2a and the tooth side 2b of the tooth groove of the internal ring gear 2, and a hardening coil for cooling the tooth bottom 2a and the tooth side 2b of the tooth groove heated by induction. A cooling unit 11 and a blunting cooling unit 12 for cooling a tooth side 2d opposite to the tooth top 2c of the pair of teeth sandwiching the induction heated tooth gap and the tooth side of the induction heated tooth groove including.

  The heating coil 10 is supplied with high frequency power from a power supply unit 7 configured to include a high frequency power supply and a transformer. The quenching cooling unit 11 and the blunting cooling unit 12 are configured to inject the coolant toward the surface of the tooth to be cooled, and the quenching cooling unit 11 and the blunting cooling unit 12 The cooling fluid is supplied from the cooling fluid supply unit 8 to each. As a cooling fluid, water etc. are used, for example.

  The moving unit 5 supports the hardening unit 4 and is configured to be movable in the horizontal direction (Y-axis direction) passing through the rotation axis of the rotary table 3 and in the vertical direction (Z-axis direction).

  The heating coil 10 is disposed close to the tooth groove at a predetermined processing position of the internal gear ring gear 2 placed on the rotary table 3 by the movement of the moving unit 5 in the Y-axis direction. Evacuated from Then, the heating coil 10 is moved along the tooth space at the predetermined processing position by the movement of the moving unit 5 in the Z-axis direction.

  FIG. 4 shows an outline of a method of quenching the tooth groove of the internal ring gear 2 by the quenching device 1.

  The high frequency power is supplied to the heating coil 10 disposed close to the tooth space at the predetermined processing position, and the tooth base 2 a and the tooth side surface 2 b of the tooth space are inductively heated by the heating coil 10. The heating coil 10 is directed from one end side (quenching start side) to the other end side (quenching end side) of the tooth groove along the tooth groove while induction heating the tooth bottom 2a and the tooth side surface 2b of the tooth groove Be moved.

  The cooling portion 11 for quenching is a cooling liquid directed to the tooth base 2 a and the tooth side surface 2 b of the tooth groove induction-heated while being moved integrally with the heating coil 10 along the tooth groove induction-heated by the heating coil 10. Inject As a result, the tooth base 2a and the tooth side 2b of the tooth groove are hardened in order from the end on the quenching start side of the tooth groove in the moving direction of the heating coil 10 and the cooling portion 11 for hardening.

  After the hardening of one tooth groove is completed, the rotary table 3 (see FIG. 1) is rotated to feed an arbitrary number of tooth grooves disposed at a predetermined processing position. And hardening with respect to the tooth groove arrange | positioned in a to-be-processed position is repeated. Thereby, all the tooth gaps are hardened.

  In the above-described quenching of the tooth spaces of each tooth, the blunting cooling portion 12 (see FIGS. 2 and 3) is moved integrally with the heating coil 10 while the tooth spaces are induction heated by the heating coil 10. The coolant is jetted toward the tooth flank 2d opposite to the tooth tip 2c of each pair of pinching teeth and the tooth flank 2b on the side of the tooth to be induction-heated.

  Intermittent rotation of the rotary table 3, movement of the quenching unit 4 by the moving unit 5, supply of high-frequency power from the power supply unit 7 to the heating coil 10, quenching control unit 11 from the cooling liquid supply unit 8 and blunting suppression The supply of the cooling fluid to the cooling unit 12 is generally controlled by the control unit 6.

  5 to 8 show the configuration of the hardening unit 4.

  The heating coil 10 of the hardening unit 4 has a head portion 20 disposed in the tooth groove of the internal gear ring gear 2 and a pair of lead portions 21 and 22 extending from the head portion 20.

  The head portion 20 extends vertically in a length less than the tooth width of the internal gear ring gear 2, and is formed so as to be able to enter the tooth groove of the internal gear ring gear 2. When the tooth base 2a and the tooth side 2b of the tooth space are inductively heated by the heating coil 10, the head portion 20 has a predetermined gap (hereinafter referred to as a coil gap) between the tooth base 2a and the tooth side 2b of the tooth space. Is placed in the tooth space, and the portions of the tooth bottom surface 2a of the tooth space and the facing portions of the tooth side surface 2b with the head portion 20 are induction heated.

  One lead portion 21 is extended from one end of the head portion 20, and the other lead portion 22 is parallel to the lead portion 21 with an appropriate insulating member interposed between the lead portion 21 and the lead portion 21, It extends from the other end of the head portion 20. Terminals 23 connected to the power supply unit 7 are respectively provided in the pair of lead units 21 and 22, and the current supplied from the power supply unit 7 to the heating coil 10 is a head through the pair of lead units 21 and 22. Flow to section 20.

  Inside the head portion 20 and the pair of lead portions 21 and 22, a series of flow paths through which the coolant flows are provided. A coupler 24 connected to the cooling liquid supply unit 8 is provided at the end of each of the pair of lead portions 21 and 22. The head portion 20 and the pair of lead portions 21 and 22 that generate heat as the current is supplied are cooled by the cooling liquid supplied from the cooling liquid supply portion 8 and circulated in the internal flow path.

  The cooling unit 11 for quenching of the quenching unit 4 has a cooling jacket 30.

  The cooling jacket 30 is provided vertically below the head portion 20 and fixed to the lead portion 22 so that the quenching portion 11 is moved integrally with the heating coil 10 from the vertical bottom to the upper portion, and the heating coil It is arranged opposite to the tooth space which is inductively heated by 10.

  The cooling jacket 30 is configured to include an internal space serving as a coolant reservoir and a plurality of nozzle holes communicating with the coolant reservoir. At the end of the cooling jacket 30, a coupler 31 connected to the cooling liquid supply unit 8 is provided. The coolant supplied from the coolant supply unit 8 to the coolant reservoir of the cooling jacket 30 is directed from the plurality of nozzle holes communicating with the coolant reservoir to the tooth bottom 2a and the tooth side 2b of the tooth groove of the internal gear ring gear 2. It is injected.

  The cooling fluid jetted from the cooling jacket 30 is applied to a portion adjacent to the vertically lower portion of the portion (face to be heated) opposite to the head portion 20 in the tooth bottom 2a and the tooth side 2b of the tooth space, and the induction heating is performed. The portion is cooled immediately after heating along with the movement of the heating coil 10 and the cooling unit 11 for quenching.

  The blunting cooling unit 12 of the quenching unit 4 includes a pair of cooling jackets 40 and 41, liquid supply pipes 42a, 42b, 42c and 42d, and liquid supply pipes 43b, 43b, 43b and 43b.

  The pair of cooling jackets 40 and 41 are provided on both sides of the heating coil 10 in the arrangement direction of the teeth of the internal gear ring gear 2 and fixed to the lead portions 21 respectively. The cooling jackets 40 and 41 are each provided with a fixing portion 50 fixed to the lead portion 21.

  And one cooling jacket 40 is arranged to be opposed to one of the pair of teeth sandwiching the tooth gap to be induction heated by the heating coil 10, and the other cooling jacket 41 is the other tooth It is arranged opposite to.

  The cooling jacket 40 has a plurality of injection parts aligned in the vertical direction, and in the illustrated example, has injection parts 44a, 44b, 44c and 44d. The injection portion 44 a is configured to include a cooling liquid reservoir 51 formed inside the cooling jacket 40 and a plurality of nozzle holes 52 communicating with the cooling liquid reservoir 51. The injection parts 44b, 44c and 44d are also configured to include the cooling fluid reservoir 51 and the nozzle hole 52, respectively, as the injection part 44a. The coolant reservoirs 51 of the jet parts 44a, 44b, 44c, 44d are isolated from one another.

  The liquid supply pipes 42a, 42b, 42c and 42d are provided for the respective injection parts 44a, 44b, 44c and 44d of the cooling jacket 40. The liquid supply pipe 42a is extended from the injection part 44a, and a coupler 53 connected to the cooling liquid supply part 8 is provided at the end of the liquid supply pipe 42a. The liquid supply pipe 42b is extended from the injection part 44b, the liquid supply pipe 42c is extended from the injection part 44c, and the liquid supply pipe 42d is extended from the injection part 44d, and the liquid supply pipes 42b, 42c and 42d are provided at their respective end portions. The coupler 53 is also provided.

  The cooling liquid individually supplied from the cooling liquid supply unit 8 to the cooling liquid reservoir 51 of the injection unit 44a through the liquid supply pipe 42a is the tip of the tooth tip of the tooth facing the cooling jacket 40 from the nozzle hole 52 of the injection unit 44a. It is jetted toward the face 2c and the tooth flank 2d. The cooling fluid is separately supplied from the cooling fluid supply unit 8 to the cooling fluid reservoir 51 of each of the spraying units 44b, 44c, and 44d via the corresponding fluid supply pipe, and the supplied cooling fluid is supplied to the spraying unit 44b, Spraying is performed from the nozzle holes 52 of each of 44c and 44d toward the tooth tip 2c and the tooth side 2d of the teeth.

  The cooling jacket 41 has a plurality of injection parts arranged in the vertical direction symmetrically with the cooling jacket 40, and in the illustrated example, has injection parts 45a, 45b, 45c, 45d. The injection portion 45 a is configured to include the coolant reservoir 51 formed inside the cooling jacket 41 and a plurality of nozzle holes 52 communicating with the coolant reservoir 51. The injection parts 45b, 45c and 45d are also configured to include the cooling fluid reservoir 51 and the nozzle hole 52, respectively, as in the injection part 45a. The respective coolant reservoirs 51 of the jet parts 45a, 45b, 45c, 45d are isolated from one another.

  The liquid supply pipes 43a, 43b, 43c and 43d are provided for the respective injection portions 45a, 45b, 45c and 45d of the cooling jacket 41. The liquid supply pipe 43a is extended from the injection part 45a, and the coupler 53 connected to the cooling liquid supply part 8 is provided at the end of the liquid supply pipe 43a. The liquid supply pipe 43b is extended from the injection part 45b, the liquid supply pipe 43c is extended from the injection part 45c, and the liquid supply pipe 43d is extended from the injection part 45d, and the liquid supply pipes 43b, 43c and 43d are provided at their respective end portions. The coupler 53 is also provided.

  The cooling liquid individually supplied from the cooling liquid supply unit 8 to the cooling liquid reservoir 51 of the injection unit 45a through the liquid supply pipe 43a is the tip of the tooth tip of the tooth facing the cooling jacket 41 from the nozzle hole 52 of the injection unit 45a. It is jetted toward the face 2c and the tooth flank 2d. The cooling fluid is separately supplied from the cooling fluid supply unit 8 to the cooling fluid reservoir 51 of each of the spraying units 45b, 45c, 45d via the corresponding fluid supply pipe, and the supplied cooling fluid is supplied to the spraying unit 45b, The nozzle holes 45c, 45d are jetted from the nozzle holes 52 toward the tooth tip 2c and the tooth side 2d of the teeth.

  The liquid supply pipes 42a, 42b, 42c, 42d and the liquid supply pipes 43a, 43b, 43c, 43d are provided with valves 54 which are opened and closed by the control unit 6, respectively. The supply of the coolant to each of the jet parts 44a, 44b, 44c and 44d of the cooling jacket 40 and the jet parts 45a, 45b, 45c and 45d of the cooling jacket 41 is controlled for each jet part by opening and closing these valves 54. Thus, the injection of the coolant from each of the jet units 44a, 44b, 44c, 44d and the jet units 45a, 45b, 45c, 45d is controlled for each jet unit.

  In the above-described configuration, the control unit 6 includes the injection units 44a, 44b, 44c and 44d and the injection units 45a, 45b, 45c and 45d according to the movement of the blunting cooling unit 12 moved integrally with the heating coil 10. The injection of the cooling fluid from each is controlled for each injection part, and the injected cooling fluid interposes a pair of tooth gaps between which the induction heating is performed by the heating coil 10 in the moving direction of the cooling part 12 for blunting suppression. Stop the injection of the coolant from the excess injection part.

  FIG. 9 shows the details of the method of quenching the tooth groove of the internal ring gear 2 by the quenching device 1.

  First, an appropriate inspection jig is used so that a predetermined coil gap is placed between the head portion 20 of the heating coil 10 and the tooth base 2a and the tooth side surface 2b of the tooth space, and the heating coil 10 is used as the internal tooth ring gear 2 Is positioned with respect to the tooth space at the predetermined processing position of Since the internal gear ring gear 2 is coaxial with the rotary shaft of the rotary table 3 and placed on the rotary table 3, the tooth grooves are sequentially arranged at predetermined processing positions as the rotary table 3 rotates. For each, the positioning of the heating coil 10 is reproduced.

  As described above, the movement of the moving unit 5 controlled by the control unit 6 in the vertical direction (Z-axis direction) causes the heating coil 10 and the cooling unit 11 for quenching to be teeth of the internal gear gear 2 at the predetermined processing position. It is moved along the groove. With the movement of the heating coil 10 and the quenching portion 11, the head portion 20 inductively heats the opposing portions of the tooth bottom 2a and the tooth side 2b of the tooth groove to the head portion 20, and the induction heated teeth of the tooth groove The heated portions of the bottom surface 2 a and the tooth side surface 2 b are cooled immediately after heating by the cooling liquid injected from the cooling jacket 30 of the quenching portion 11. In the present embodiment, the heating coil 10 and the cooling unit 11 for quenching are moved vertically from the bottom to the top.

  One cooling jacket 40 of the blunting cooling portion 12 is disposed to face one of the pair of teeth sandwiching the tooth gap to be induction heated by the heating coil 10, and the other cooling jacket 41 Is placed opposite to the other tooth ridge. Since the cooling jackets 40 and 41 are fixed to the heating coil 10, the cooling jackets 40 and 41 are also provided with teeth according to the positioning of the heating coil 10 with respect to each of the tooth grooves sequentially disposed at a predetermined processing position. It is positioned automatically.

  Then, assuming that the blunting cooling portion 12 is moved upward from the vertically lower part integrally with the heating coil 10, the injection portions 44a, 44b are arranged in order from the top in the arrangement of the injection portions 44a, 44b, 44c, 44d of the cooling jacket 40. , 44c is applied to the area extending from the upper end position to the lower end position of the head portion 20 in the tooth tip 2c and the tooth side 2d of the tooth flank to which the cooling jacket 40 faces, and is jetted from the injector 44d The coolant is applied to a region below the lower end position of the head portion 20 at the tooth tip 2c and the tooth side 2d of the tooth top.

  Similarly, in the arrangement of the injection parts 45a, 45b, 45c, 45d of the cooling jacket 41, the cooling liquid injected from the injection parts 45a, 45b, 45c in order from the top is the apical surface 2c of the tooth flank to which the cooling jacket 41 faces. The cooling liquid sprayed from the spray unit 45d covers the range from the upper end position to the lower end position of the head portion 20 in the tooth side surface 2d and is lower than the lower end position of the head portion 20 in the tooth crest 2c and the tooth side surface 2d. Also in the lower area.

  The number of injection parts in the cooling jackets 40 and 41 and the division of the cooling area for each injection part are not limited to the above example.

  The coolant is jetted from each of the jets 44a, 44b, 44c, 44d of the cooling jacket 40 and the jets 45a, 45b, 45c, 45d of the cooling jacket 41 until the upper end of the head portion 20 reaches the upper end of the tooth groove. (FIG. 9A).

  When the upper end of the head portion 20 reaches the upper end of the tooth space, the coolant jetted from the jet portion 44 a of the cooling jacket 40 reaches the upper end of the tooth facing the cooling jacket 40, and the jet portion 45 a of the cooling jacket 41. The coolant jetted from the upper reaches the upper end of the teeth facing the cooling jacket 41. At this timing, the control unit 6 stops the supply of the coolant to the injection unit 44a and the injection unit 45a, and the injection of the coolant from the injection unit 44a and the injection unit 45a is stopped (FIG. 9B).

  Subsequently, the heating coil 10, the cooling unit 11 for quenching, and the cooling unit 12 for blunting suppression are vertically moved, and the coolant injected from the injection unit 44b of the cooling jacket 40 and the injection unit 45b of the cooling jacket 41 is the upper end of the teeth. The supply of the coolant to the injection unit 44 b and the injection unit 45 b is stopped by the control unit 6 at the timing when it reaches (FIG. 9 C).

  Subsequently, the heating coil 10, the cooling unit 11 for quenching, and the cooling unit 12 for blunting suppression are vertically moved, and the coolant injected from the injection unit 44c of the cooling jacket 40 and the injection unit 45c of the cooling jacket 41 is the upper end of the teeth. The supply of the coolant to the injection unit 44c and the injection unit 45c is stopped by the control unit 6 at the timing when it reaches (FIG. 9D).

  Thereafter, when the lower end of the head portion 20 reaches the upper end of the tooth groove, the movement of the heating coil 10, the quenching portion 11 for quenching, and the cooling portion 12 for blunting suppression is stopped. The upper end is cooled. Until the cooling of the upper end of the tooth groove is completed, the coolant is injected from the injection portion 44d of the cooling jacket 40 and the injection portion 45d of the cooling jacket 41 toward the tooth tip 2c and the tooth side 2d of the upper end of the tooth And the blunting of the upper end of the tooth space adjacent to the induction heated tooth space is suppressed (FIG. 9E).

  As described above, according to the movement of the cooling unit 12, the sprayed coolant is induction heated by the heating coil 10 among the spray units 44 a, 44 b, 44 c, and 44 d and the spray units 45 a, 45 b, 45 c, and 45 d. By stopping the injection of the cooling fluid from the injection unit that extends in the moving direction of the pair of teeth sandwiching the tooth space between the cooling teeth and the cooling fluid injected from the cooling limitation cooling unit 12. It is possible to prevent contact with the end surface of the end of quenching of the teeth.

  Thereby, the cooling portion 12 for preventing blunting is performed before the tooth base 2a and the tooth side surface 2b at the end portion on the quenching end side of the tooth groove are cooled by the cooling liquid injected from the cooling portion 11 for quenching. It is possible to prevent the end of the tooth groove from being quenched on the quenching end side by preventing cooling from the end on the quenching end side by the coolant injected from the above.

  That is, it is possible to stabilize the tooth groove without requiring fine adjustment such as the injection amount of the cooling liquid injected from the cooling part 12 for cooling suppression and the injection direction of the cooling liquid injected from the cooling part 12 for cooling lowness. Quenching quality can be obtained, and further, quenching quality can be improved.

  In addition, the structure of the cooling part 12 for blunting suppression is not limited to the example of illustration. For example, the shapes of the cooling jackets 40 and 41 provided in the blunting cooling portion 12 and the position and number of the nozzle holes 52 of each injection portion are appropriately determined according to the tooth shape of the toothed member such as the module of the internal gear 2 and pressure angle. Adjusted.

  As described above, the quenching apparatus disclosed in the present specification inductively heats and heats the tooth base and the tooth side of the tooth space while moving the heating coil along the tooth space of the toothed member. A quenching apparatus for cooling the bottom and side surfaces of the tooth groove to harden the tooth groove one by one, each of a pair of teeth flanking the tooth groove inductively heated by the heating coil A cooling unit having a plurality of injection units for injecting a cooling liquid toward the tooth flank opposite to the tooth tip and the tooth flank on the tooth groove side, the cooling unit being moved integrally with the heating coil, and the cooling unit Controlling the injection of the cooling liquid from each of the injection units according to the movement of each of the injection units, and cooling from the injection units in which the injected cooling liquid exceeds the pair of teeth in the moving direction of the cooling unit And a controller configured to stop the injection of the liquid.

  Further, in the quenching apparatus disclosed in the present specification, the cooling liquid is supplied to each of the injection units for each injection unit, and the control unit injects the supply of the cooling liquid to each of the injection units. Control each time.

  Further, in the quenching apparatus disclosed in the present specification, the cooling unit includes a pair of cooling jackets disposed so as to face the pair of teeth, and the pair of cooling jackets is a movement of the cooling unit. The cooling liquid reservoir and the cooling fluid reservoir are respectively provided with a plurality of cooling fluid reservoirs to which the cooling fluid is separately supplied, and a plurality of injection ports provided for each cooling fluid reservoir. It is comprised by the said injection port provided in the cooling fluid reservoir.

  Further, in the quenching apparatus disclosed in the present specification, the pair of cooling jackets is fixed to the heating coil.

  Further, according to the quenching method disclosed in the present specification, the induction heating is performed on the tooth base and side surface of the tooth space while the heating coil is moved along the tooth space of the toothed member. A method of cooling the bottom and side surfaces of the teeth to harden the teeth one tooth at a time, wherein a cooling unit having a plurality of injection parts is provided along a pair of teeth sandwiching the teeth. A cooling fluid is injected from the injection portion toward the tooth top surface of each of the pair of teeth and the tooth side opposite to the tooth side surface of the tooth space while moving integrally with the heating coil, and the cooling In accordance with the movement of the part, the injection of the cooling fluid from the injection part is controlled for each injection part, and the cooling liquid from the injection part passes over the pair of teeth in the movement direction of the cooling part. Stop the injection of

  In the cooling jacket disclosed herein, the base surface and the side surface of the tooth groove are induction-heated while moving the heating coil along the tooth groove of the toothed member, and the induction-heated tooth groove is It is used in a quenching apparatus that cools the tooth base and side surface and hardens the tooth space one by one, and is disposed opposite to a pair of tooth flanks sandwiching the tooth space that is inductively heated by the heating coil A cooling jacket, which is moved integrally with the heating coil, and sprays a coolant toward the tooth top of each of the pair of teeth and the tooth side opposite to the tooth side of the tooth space side, A plurality of cooling liquid reservoirs aligned in the moving direction of the cooling jacket, and a plurality of injection ports provided for each cooling liquid reservoir, wherein the cooling liquid is supplied to each of the cooling liquid reservoirs for each cooling liquid reservoir; The injection of the cooling liquid from each of the injection ports can be controlled for each cooling liquid reservoir That.

  Also, the cooling jacket disclosed herein has a fixing portion fixed to the heating coil.

1 Hardening device 2 Internal gear ring gear (toothed member)
2a Tooth base 2b Tooth side 2c Tooth tip 2d Tooth side 3 Rotary table 4 Hardening unit 5 Moving unit 6 Control unit 7 Power supply unit 8 Cooling liquid supply unit 10 Heating coil 11 Quenching cooling unit 12 Suppression cooling unit 40 Cooling Jackets 41 Cooling jackets 44a, 44b, 44c, 44d Jetting portions 45a, 45b, 45c, 45d Jetting portion 50 Fixing portion 51 Cooling liquid reservoir 52 Nozzle hole

Claims (5)

The base surface and the side surface of the tooth space are induction heated while moving the heating coil along the tooth groove of the toothed member, and the base surface and the side surface of the tooth space which is induction heated are cooled and the tooth groove is A hardening device that hardens one tooth at a time,
An injection unit for injecting a cooling liquid toward the tooth top surface of each of a pair of teeth sandwiching the tooth space induction-heated by the heating coil and the tooth side opposite to the tooth side surface on the tooth space side A cooling unit having a plurality of heating coils in the moving direction and moving integrally with the heating coils;
According to the movement of the cooling unit, the injection of the coolant from each of the injection units is controlled for each of the injection units, and the injected cooling liquid passes the pair of teeth in the moving direction of the cooling unit. A control unit that stops the injection of the coolant from the
Hardening device provided with The hardening apparatus according to claim 1, wherein
A coolant is supplied to each of the injection units for each of the injection units,
The said control part is a hardening apparatus which controls supply of the cooling fluid to each of the said injection part for every injection part. The hardening apparatus according to claim 2, wherein
The cooling unit includes a pair of cooling jackets disposed to face the pair of teeth,
Each of the pair of cooling jackets has a plurality of cooling liquid reservoirs, in which the cooling fluid is separately supplied, arranged in the moving direction of the cooling unit, and a plurality of injection ports provided for each cooling liquid reservoir,
Each of the said injection part is a quenching apparatus comprised by the said cooling fluid reservoir and the said injection port provided in the said cooling fluid reservoir. The hardening apparatus according to claim 3, wherein
The quenching apparatus in which the pair of cooling jackets are respectively fixed to the heating coil. The base surface and the side surface of the tooth space are induction heated while moving the heating coil along the tooth groove of the toothed member, and the base surface and the side surface of the tooth space which is induction heated are cooled and the tooth groove is It is a hardening method that hardens one tooth at a time,
The tip surface of each of the pair of teeth while moving integrally the cooling unit having a plurality of injection units in the moving direction of the heating coil along the pair of teeth sandwiching the tooth space, and the heating coil A coolant is jetted from the jet portion toward the side of the tooth opposite to the side of the tooth on the side of the tooth space;
According to the movement of the cooling unit, the injection of the cooling fluid from the injection unit is controlled for each of the injection units, and the injected cooling liquid passes from the pair of teeth in the moving direction of the cooling unit from the injection unit. A quenching method that stops the injection of coolant.

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