JP2972107B2 - Non-oxidizing quenching equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oxidation-free quenching apparatus .

[0002]

2. Description of the Related Art Oxidation-free quenching is performed by heating a work in an oxidizing gas such as a nitrogen gas. The non-oxidizing quenching device for performing such non-oxidizing quenching is, specifically,
The lower end of the chamber whose lower end is open is immersed in a cooling liquid, the work is always carried into the chamber through the cooling liquid, and is heated by a heating coil in the chamber.

[0003]

However, the conventional non-oxidizing and quenching apparatus has the following problems. That is, generally, a quenching oil having a high viscosity is used as the cooling liquid, so that the cooling liquid adheres to the work before being heated by the heating coil, and a large amount of white smoke is generated by the heating. Such white smoke is exhausted to the outside through exhaust holes provided in the ceiling of the chamber.However, in order to maintain a favorable working environment, etc., the non-oxidizing quenching equipment requires smoke exhaust equipment such as smoke exhaust ducts. It was indispensable.

[0004] When the work to which the cooling liquid has adhered is heated, there are places where the amount of the applied cooling liquid differs depending on the shape of the work, particularly irregularities. Therefore, there is a problem that a uniform quenching depth cannot be obtained depending on the shape of the work.

[0005] Further, when the work with the cooling liquid adhered thereto is heated, residues of the cooling liquid or foreign substances contained in the cooling liquid may adhere to the work.

The present invention has been made in view of the above circumstances, and does not generate a large amount of white smoke due to heating, can obtain a uniform quenching depth, and does not adhere a residue of a coolant to a work. It is intended to provide a non-oxidizing and quenching device .

[0007]

SUMMARY OF THE INVENTION According to the present invention, there is provided an oxidation-free quenching.
The equipment consists of a chamber filled with non-oxidizing gas and this
A heating coil for heating the workpiece in the chamber;
Is moved between the coolant and the non-oxidizing gas.
Work moving means and the work in the non-oxidizing gas
Cooling liquid removing means for removing the cooling liquid,
The coolant removing means is directed to the work of the heating coil.
Of the same component as the non-oxidizing gas from the injection hole opened on the surface
The removal gas is injected.

[0008] Another non-oxidizing and quenching apparatus according to the present invention includes a chamber filled with non-oxidizing gas and this chamber.
A heating coil for heating the workpiece in the bar;
Is moved between the cooling liquid and the non-oxidizing gas.
Work moving means and cooling from work in non-oxidizing gas
Cooling liquid removing means for removing a liquid;
The liquid removing means moves the work by the work moving means.
A gas injection unit provided in the middle of the path, and the gas injection unit
For the removal of the same components as the non-oxidizing gas
Gas supply means.

[0009]

FIG. 1 is a schematic structural view showing a first embodiment of a non-oxidizing and quenching apparatus of the present invention, and FIG. 2 is a second embodiment of a non-oxidizing and quenching apparatus of the present invention. It is a schematic structure figure shown .

As shown in FIG. 1, the non-oxidizing and quenching apparatus according to the first embodiment includes a chamber 200 filled with a non-oxidizing gas G, and a heating coil 100 for heating a workpiece W in the chamber 200. A work moving means 400 for moving the work W between the cooling liquid L and the non-oxidizing gas G, and a cooling liquid removing means 300 for removing the cooling liquid from the work W in the non-oxidizing gas G. .

Here, the non-oxidizing gas G is a gas containing no oxygen, and for example, a nitrogen gas, an argon gas, or the like is used in consideration of the relationship with the material of the work W and the like.

The lower end of the chamber 200 is open, and the lower end is immersed in the cooling liquid L. Also,
An exhaust hole 210 is opened in the ceiling of the chamber 200. Note that the ceiling of the chamber 200 is
The reason why the slope is inclined toward zero is to increase the efficiency of exhaust.

Further, since the non-oxidizing gas G is constantly supplied into the chamber 200 from the gas supply pipe 600, even if the non-oxidizing gas G is exhausted from the exhaust holes 210, the non-oxidizing gas G remains in the chamber 200. The oxidizing gas G is full. Since the internal pressure of the chamber 200 is set slightly higher than the atmospheric pressure, the level of the cooling liquid L in the chamber 200 is slightly lower than the other parts as shown in FIG.

The heating coil 100 is appropriately selected depending on the shape of the work W and the like. Such a heating coil 10
0 is installed in the chamber 200 and connected to the power supply 700. It is controlled by a control signal 520 from the power supply device 500.

The heating coil 100 also serves as the cooling liquid removing means 300. That is, the heating coil 100
Since the inside is formed hollow, a plurality of injection holes (not shown) are opened on the surface facing the work W, and the gas supply means 310 constituting the cooling liquid removing means 300 is connected. is there.

The removal gas g is provided in the chamber 200
A gas having the same components as the non-oxidizing gas G is used. That is, in this embodiment, nitrogen gas is used as the removal gas g. This is to prevent the atmosphere inside the chamber 200 from being changed each time the coolant L is removed from the work W.

An on-off valve 330 is provided in a pipe 320 between the gas supply means 310 and the heating coil 100. The opening and closing of the on-off valve 330 is controlled by a control signal 510 from the control unit 500.

Next, the operation of the non-oxidizing and quenching apparatus having the above configuration will be described. First, the work moving means 400 on which the work W is set reaches a predetermined position below the chamber 200 through the cooling liquid L.

In this state, the work moving means 400 starts to rise, and the work W is set inside the heating coil 100. At this time, the on-off valve 330 is opened by the control signal 510 from the control unit 500, and the removal gas g is injected to the work W. By the injection of the removal gas g onto the work W, the cooling liquid L attached to the work W is blown off and removed. The time and pressure for injecting the removal gas g are determined by the size and shape of the workpiece W and the coolant L
Is set in consideration of the viscosity, working time, etc.

When the removal of the cooling liquid L by the injection of the removing gas g is completed, the control signal 510 from the control unit 500 to the on-off valve 330 is stopped, and the control signal 520 to the power supply unit 700 is sent out. The heating coil 100 heats the work W. During the heating of the workpiece W, the workpiece moving means 400 moves the workpiece W to secure a uniform quenching depth.
Is rotating.

When the heating for a predetermined time is completed, the work moving means 400 descends and immerses the work W in the cooling liquid L. Thus, the quenching of the work W is completed.
Thereafter, the work moving means 400 moves from below the chamber 200 to the next predetermined position and rises, carries out the quenched work W by a carry-out device (not shown), and sets a new work W.

Next, a second embodiment will be described with reference to FIG. The non-oxidizing and quenching apparatus according to the second embodiment includes:
The difference from the non-oxidizing and quenching apparatus according to the first embodiment is that the heating coil 100 does not constitute the cooling liquid removing means 300.

That is, the cooling liquid removing means 300 in the non-oxidizing and quenching apparatus according to the second embodiment includes a gas injection section 340 provided in the middle of the movement path of the work W by the work movement means 400, And a gas supply unit 310 for supplying the removal gas g to the unit 340.

The gas injection section 340 is set in a substantially ring shape corresponding to the shape of the work W. In particular,
The gas injection unit 340 is configured to have substantially the same shape as the heating coil 100, and is installed below the heating coil 100 and on the surface of the cooling liquid L. Then, the workpiece W passes through the inside of the gas injection unit 340 and passes through the heating coil 10.
0 is reached.

A plurality of injection holes 341 are formed on the inner surface of the gas injection section 340. That is, when the work W passes through the inside of the gas injection unit 340, the removing liquid g is injected to the work W to remove the attached cooling liquid L.

Here, the size, position, and the like of the injection hole 341 are set in consideration of the size, shape, and the like of the work W. For example, in a portion where a large amount of the cooling liquid L easily adheres, such as a gear tooth bottom portion, more injection holes 341 are opened in order to inject a large amount of the removal gas g.

Whether or not the work W has reached the gas injection unit 340 is detected by an optical sensor or a magnetic sensor (not shown) that can withstand the environment such as high temperature and high humidity in the chamber 200. The detection results of these sensors are sent to the control unit 500, and a control signal 510 is sent to the on-off valve 330 based on the detection results.

The other parts are the same as those of the non-oxidizing and quenching apparatus according to the first embodiment, and a detailed description thereof will be omitted.

The operation of the non-oxidizing and quenching apparatus according to the second embodiment will be described. First, the work moving means 400 on which the work W is set reaches a predetermined position below the chamber 200 through the cooling liquid L.

In this state, the work moving means 400 starts ascending. When the work W passes through the inside of the gas injection unit 340, the on-off valve 330 is opened by the control signal 510 from the control unit 500, and the removal gas g is injected to the work W. By the injection of the removal gas g onto the work W, the cooling liquid L attached to the work W is blown off and removed. In addition, the time for injecting the removal gas g,
The pressure and the like are determined by the size and shape of the work W,
Set in consideration of overall work time.

The work W from which the coolant L has been removed by the injection of the removal gas g is further raised by the work moving means 400 and set inside the heating coil 100. A control signal 520 is sent from the control unit 500 to the power supply device 700, and the heating coil 100 heats the work W. During the heating of the work W, the work moving means 4
No. 00 rotates the work W in order to secure a uniform quenching depth.

When the heating for a predetermined time is completed, the work moving means 400 descends and immerses the work W in the cooling liquid L. Thus, the quenching of the work W is completed. Thereafter, the work moving means 400 moves from below the chamber 200 to the next predetermined position and rises, carries out the quenched work W by a carry-out device (not shown), and sets a new work W.

[0033]

By the way, in the first or second embodiment,
In such an oxidation-free quenching apparatus, the cooling liquid L
May be added. That is, the cooling liquid L
The work W is rotated by the work moving means 400 at a high speed while the work W coming out of the heating coil 100 is being raised toward the heating coil 100, and the cooling liquid L is removed by the centrifugal force at that time. The rotation speed, rotation time, and the like of the work W are set in consideration of the size and shape of the work W, the viscosity of the cooling liquid L, the work time, and the like.

The other parts are the same as those of the non-oxidizing and quenching apparatuses according to the first and second embodiments, so that detailed description will be omitted.

In the first to third embodiments, the heating coil 100 is used to inject the removal gas g, the heating coil 100 is provided with a gas injection unit 340 different from the heating coil 100,
Although the rotation of the workpiece W has been described, the present invention is not limited to this. For example, the above three types can be arbitrarily combined. By combining a plurality of types in this manner, the coolant L can be more reliably removed.

[0037]

[0038]

[0039]

[0040]

[0041]

According to the first aspect of the present invention, there is provided an oxidation-free quenching apparatus.
Chamber filled with activated gas
The heating coil that heats the workpiece and the coolant that cools the workpiece
Work that moves between inside and the non-oxidizing gas
Moving fluid and removing the coolant from the workpiece in the non-oxidizing gas
And a cooling liquid removing means.
The step is opened on the surface of the heating coil facing the workpiece.
Gas for removing the same component as the non-oxidizing gas
Inject. Since the cooling liquid is not adhered to the work to be heated by the cooling liquid removing means , a large amount of white smoke is not generated by the heating. For this reason, a conventional smoke exhaust facility such as an exhaust duct is not required, and a good working environment can be obtained without providing such a facility. Also, even if the work has irregularities, the coolant does not adhere to the work, so that the quenching depth does not become uneven unlike the conventional case, and furthermore, the residue of the coolant does not adhere to the work. It also has an effect.

Further, since it is intended to inject removing gas in a non-oxidizing gas and the same components in Chi Yanba the work efficiently performed that the removal of the cooling fluid without changing the atmosphere in the Chi Yanba Can be.

[0043] Furthermore, the cooling liquid removal means, since it is intended to inject removing gas from been injection hole opened on the surface towards the heating coil work, also serves as a part of the cooling liquid removal means and the heating coil Since it is possible, additional equipment is reduced, and it is effective even when there is little space in the chamber.

The non-oxidizing and quenching apparatus according to claim 2 is
A chamber filled with non-oxidizing gas and this chamber
A heating coil that heats the work inside the
Work moving between the reject liquid and the non-oxidizing gas.
Cooling fluid from the work in the non-oxidizing gas
Cooling liquid removing means for removing the cooling liquid.
The removing means is a moving path of the work by the work moving means.
And a gas injection unit provided in the middle of
To provide a gas for removing the same components as the non-oxidizing gas.
Gas supply means. For this reason, it is possible to set a gas injection unit having an optimal size or the like for the workpiece without being affected by the size, shape, and the like of the heating coil.
It is possible to more efficiently remove the cooling liquid. Also, coolant
The effect provided with the removing means is the non-oxidation according to claim 1 described above.
It is the same as the case of the quenching device.

[0045]

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a first embodiment of an oxidation-free quenching apparatus of the present invention.

FIG. 2 is a schematic configuration diagram showing a second embodiment of the non-oxidizing and quenching apparatus of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 heating coil 200 chamber 300 coolant removing means 400 work moving means W work L coolant G non-oxidizing gas g removing gas

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) C21D 1/18 C21D 1/10 C21D 1/63 C21D 1/00 C21D 1/74

Claims (2)

(57) [Claims] A chamber filled with a non-oxidizing gas;
Heating coil that heats the work in this chamber
The work in the coolant and in the non-oxidizing gas.
Work moving means to move and work in non-oxidizing gas
Cooling liquid removing means for removing the cooling liquid from the
The cooling liquid removing means is provided on the work of the heating coil.
The same as the non-oxidizing gas from the injection hole opened on the facing surface
It is characterized by injecting one-component removal gas.
Non-oxidizing quenching equipment. 2. A chamber filled with a non-oxidizing gas,
Heating coil that heats the work in this chamber
The work in the coolant and in the non-oxidizing gas.
Work moving means to move and work in non-oxidizing gas
Cooling liquid removing means for removing the cooling liquid from the
The cooling liquid removing means is provided by the work moving means.
A gas injection unit provided in the middle of the work path
Removal of the same components as the non-oxidizing gas for the gas injection unit
Gas supply means for supplying
Non-oxidizing quenching equipment.