JPH0663019B2 - Submerged hardening device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a submerged quenching apparatus used for induction hardening.

(Prior Art) Processing means for subjecting automobile parts requiring surface hardness, for example, transmission gears and ring parts of torque converters, to induction hardening by induction heating by high-frequency current to apply induction quenching. Is well known in the past. In this case, conventionally, a method has been conventionally performed in which the induction hardening is intensively performed only at a desired portion, or in order to prevent hardening distortion, the parts are immersed in a cooling liquid and hardening is performed.

(Problems to be Solved by the Invention) When induction hardening is performed in a state where the component is immersed in the cooling liquid as described above, the cooling liquid temperature around the component rises due to the quenching heat, so that the cooling liquid is agitated. It is necessary to forcibly cause convection in the cooling liquid. On the other hand, in induction hardening, the coil often has an annular structure with a missing circle, and in order to prevent uneven baking,
During quenching, it is necessary to rotate the part in the coolant. However, the devices that have been conventionally used cannot satisfy the above requirements at the same time.

The present invention has been made in view of the above points, and it is an object of the present invention to prevent uneven burning during quenching and convection stirring of a cooling liquid at the same time by using an extremely simple means. It is a thing.

(Means for Solving Problems) In the present invention, as means for solving the above problems,
In a component in which a component to be hardened is immersed in a cooling liquid and hardened by a heating coil, it is rotatably supported by a component support arranged in the cooling liquid in a cooling liquid tank, and is induction hardened. A fan for rotating the component receiver is attached to a component receiver configured to hold the component, and a liquid flow jet nozzle for accelerating the cooling liquid convection is provided facing the fan.

(Operation) In the present invention, the following operations are obtained by the above means.

That is, the convection of the cooling liquid is forcibly promoted by the liquid flow ejected from the liquid flow ejection nozzle, and the fan is rotated by the ejection liquid flow, and the component receiver ( That is, the parts that are induction hardened are held). That is,
The jet flow from the jet nozzle causes convective stirring of the cooling liquid and rotation of parts for preventing uneven burning.

(Examples) Hereinafter, preferred examples of the present invention will be described with reference to the accompanying drawings.

The submerged quenching apparatus shown in FIGS. 1 and 2 is such that a cooling liquid tank 2 placed and fixed on a base 1 and at a position adjacent to the cooling liquid tank 2 can move up and down on a machine base 4. The induction hardening apparatus 3 is installed.

The cooling liquid tank 2 is filled with a cooling liquid W made of an aqueous solution of ethylene glycol or polyvinyl alcohol, and a component support base 5 having a rotating disk shape is arranged in a state of being immersed in the cooling liquid W. Has been done.

The component support base 5 has a rotary shaft 6 on the bottom 2a of the cooling liquid tank 2.
It is rotatably supported in the cooling liquid tank 2 by being rotatably supported by a bearing 16 provided in the cooling liquid tank 2. The lower end of the rotary shaft 6 is coupled to the index motor 7 via a coupling 8, and the component support table 5 is indexed and rotated by a rotation angle of 45 degrees as the index motor 7 rotates. It is designed to be punished.

Eight component receivers 9, 9 ... Are rotatably supported at the peripheral portion of the component support base 5 so as to be vertically movable at intervals of 45 degrees.

The component receiver 9 is for holding a component (transmission gear) M to which induction hardening is applied, and has a structure shown in FIG.

That is, the component receiver 9 is composed of a component holding portion 9a for holding the component M and a shaft portion 9b extending downward from the component holding portion 9a, and the shaft portion 9b is the component support base. 5 is rotatably supported by bearings 19 and 20 in a bearing cylinder 18 which is vertically inserted into a cylinder 17 attached to the peripheral edge of the bearing.

The bearing cylinder 18 is integrally connected to a piston 21 that moves up and down in the cylinder 17, and can be moved up and down by air supplied to the cylinder inner chambers 22 and 23 partitioned by the piston 21. There is. Reference numerals 24 and 25 are air passages for supplying air to the cylinder inner chambers 22 and 23, and 26 is a rotary valve for switching and controlling the supply of air.

Further, a propeller-shaped fan 10 is pivotally attached to the lower end of the shaft portion 9b of the component receiver 9, and the component receiver 9 is rotated as the fan 10 rotates.

Thus, the component support base 5 is provided with the component receivers 9, 9, ...
Is indexed and rotated so that it can be moved sequentially from the first stage S ₁ to the eighth stage S ₈ , during which parts are attached, quenched, cooled and taken out. That is, in the first stage S ₁ , the component receiver 9 is in the raised state, and the component M is held on the component receiver 9 (in other words, the component is attached), and the second stage S 1. _{After the} component receiver 9 is lowered at ₂ and reaches the fifth stage S ₅ , quenching is performed as will be described later, the sixth and seventh stages S ₆ and S _{7 are} cooled, and the 8th stage is performed. parts receptacle 9 at S ₈ is a raised state it is has become so that removal of hardened been part M is performed.

On the other hand, the induction hardening apparatus 3 has a current supply source 11 configured to supply a high frequency current, and a missing circle for hardening the component M by high frequency induction heating with the high frequency current supplied from the current supply source 11. It is constituted by an annular coil 12. Reference numeral 13 is a coil receiver.

The coil 12 is part fifth stage S ₅ has been brought positioned above the support base 5, is configured to be brought into the lift at that position. The operation of raising and lowering the coil 12 is performed by the air cylinder 27 that raises and lowers the entire induction hardening apparatus 3. That is, the coil 12 is
By driving the air cylinder 27, it is caused to lift the component M peripheral position, which is held on the component receptacle 9 positioned the fifth stage S ₅ parts support base 5, between an upper opening 2b of the cooling liquid bath 2 It is like this.

A liquid flow jet nozzle 14 for convection of the cooling liquid is provided inside the cooling liquid tank 2 so as to face the fan 10. That is, the liquid flow ejected from the liquid flow ejection nozzle 14 causes the fan 10 to rotate and the forced convection of the cooling liquid W to be performed.

Further, at the bottom 2a of the cooling liquid tank 2, a component support 5
In the lower part of the fifth stage S _{5 of the}
There is provided a pattern shift device 15 which comes into contact with the lower end of the b and acts so as to shift the component receiver 9 up and down.

The pattern shift device 15 includes an elevating rod 29 that is supported so as to be able to ascend and descend with respect to a bearing 28 provided on the bottom portion 2a of the cooling liquid tank.
And a cam member 30 for raising and lowering the lifting rod 29. That is, when the cam member 30 is rotated by a drive mechanism (not shown), the lifting rod 2
9 is shifted up and down. The shift operation is performed when the component M held by the component receiver 9 is induction hardened at two upper and lower positions.

Next, the operation of the in-liquid quenching apparatus of the illustrated embodiment will be described.

The component receiver 9 of the component support 5 is raised by the air supply to the cylinder inner chamber 23 at the first stage S ₁ , and the component M is attached at that position.
When the component receiver 9 holding the component M reaches the second stage S ₂ with the rotation of the component support base 5, the rotary valve 26 switches the air supply path to supply air to the cylinder inner chamber 22. As a result, the parts receiver 9
Is lowered and the part M is dipped in the cooling liquid W. Further, the component support base 5 rotates to rotate the component receiver 9
(In other words, when the component M) reaches the fifth stage S ₅ ,
The induction hardening apparatus 3 is lowered by driving the air cylinder 27, and the coil 12 is positioned on the outer periphery of the component M. In this state, a high frequency current is supplied to the coil 12 to perform induction hardening at a desired position of the component M. At this time, the fan 10 is rotated by the liquid flow jetted from the liquid jet nozzle 14, and the component receiver 9 (in other words, the component M) is rotated along with the rotation of the fan 10 to the surface of the component M. Induction hardening is completely performed without causing unevenness of hardening. At the same time, forced convection is caused in the cooling liquid W by the liquid flow ejected from the liquid flow ejection nozzle 14, and the liquid temperature rise around the part M during induction hardening is suppressed.

When the induction hardening of the component M is completed, the induction hardening device 3 is moved up by the driving of the air cylinder 27, so that the coil 12 is opened in the cooling liquid tank upper opening 2.
Can be raised to b. After that, the component support base 5
While rotating up to the stage S ₇ , the component M cools the cooling liquid W.
Cooled inside. Then, in the eighth stage S _8, air is supplied into the cylinder interior 23 parts receptacle 9 is raised again by the switching operation of the rotary valve 26, the part M has completed hardening is taken out.

Continuous induction hardening is performed by continuously performing the above operation.

As described above, according to the present embodiment, the rotation operation of the component receiver 9 (in other words, the component M) for preventing the uneven burning due to the liquid flow ejected from the liquid ejecting nozzle 14 and the cooling liquid W are performed. The convection is promoted at the same time.

The present invention is not limited to the above-described embodiments, and it goes without saying that the design can be changed as appropriate without departing from the scope of the invention.

(Effects of the Invention) As described above, according to the present invention, in a component in which a component to be hardened is immersed in a cooling liquid and hardened by a heating coil, a component receiver rotatably supported on a component support base is provided. ,
Preventing uneven burning because it is rotated by the liquid flow jet from the liquid flow jet nozzle to the fan provided in the component receiver, and the cooling liquid is forcibly convected by the jet liquid flow. There is an excellent effect that the rotation of the parts for the purpose and the promotion of the convection of the cooling liquid can be simultaneously performed by the jet liquid flow from the liquid jet nozzle.

Further, there is no need to separately provide a component rotating mechanism for preventing uneven burning of the components and a stirring mechanism for promoting convection of the cooling liquid, and there is an effect that the device can be simplified.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional side view showing a submerged quenching apparatus according to an embodiment of the present invention, FIG. 2 is a top view of the submerged quenching apparatus of FIG. 1, and FIG. FIG. 3 is a cross-sectional view of a component receiver portion in the submerged quenching apparatus of FIG. 1. 2 ... Coolant tank 5 ... Component support 9 ... Component receiver 10 ... Fan 12 ... Coil 14 ... Liquid jet nozzle M ... Component W ... Coolant

Claims (1)

[Claims] 1. A component supporting base disposed in the cooling liquid in a cooling liquid tank and rotatable on the component supporting base, in which a component to be hardened is immersed in a cooling liquid and hardened by a heating coil. A component receiver configured to hold a component that is pivotally supported and subjected to induction hardening processing, a fan that is provided to rotate the component receiver, and a convection liquid coolant that is installed facing the fan. An in-liquid quenching apparatus comprising: a liquid jet nozzle for acceleration.