JPH0643171Y2 - Induction hardening equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to an induction hardening apparatus capable of easily or automatically setting a supply amount of a quenching cooling liquid.

<Conventional Technology> A conventional technology will be described below with reference to the drawings.

FIG. 5 is a block diagram of a quenching cooling liquid supply system of a conventional induction hardening apparatus. In this drawing, 4 is a jacket for injecting the quenching cooling liquid Q onto the work, and the cooling liquid Q is supplied to the jacket 1 via the solenoid valve 1, the manual valve 2 and the flow meter 3. The flow rate (l / min) of the cooling liquid Q ejected from the jacket 4 varies depending on the work, and before quenching the work, the flow meter 3 is used to appropriately adjust the opening degree of the manual valve 2. A desired flow rate of the cooling liquid Q is supplied to the jacket 4.

<Problems to be Solved by the Invention> However, in such a conventional induction hardening apparatus,
There are the following problems. That is, the opening of the manual valve must be adjusted by using a flow meter so that a desired flow rate of cooling liquid is sprayed from the jacket each time the workpiece changes. That is, it takes time and effort to set the flow rate of the cooling liquid injected from the jacket.

The present invention was devised in view of the above circumstances, and it is possible to easily set the flow rate of the cooling liquid injected from the jacket,
Alternatively, it is an object of the present invention to provide an induction hardening apparatus that can be automatically performed.

<Means for Solving the Problems> In order to solve the above problems, the induction hardening apparatus according to claim 1 includes a quenching cooling liquid supply main pipe, and a jacket for injecting the quenching cooling liquid onto the work. A plurality of parallel branch pipes provided between the main supply pipe and the jacket, and a solenoid valve having an appropriate cooling liquid passage capacity and provided in the branch pipe, and
One or more predetermined solenoid valves are opened according to the amount of cooling liquid to be supplied to the jacket.

Further, in order to solve the above-mentioned problems, the induction hardening apparatus according to claim 2 includes a current transformer to which one heating coil among a plurality of heating coils different depending on the type of work is connected and mounted, and a quenching machine. A main pipe for supplying the cooling liquid for injection, a jacket for injecting the cooling liquid for quenching onto the work, a plurality of parallel branch pipes provided between the main pipe for supplying and the jacket, and the branch having an appropriate cooling liquid passage capacity. An induction hardening apparatus comprising: a solenoid valve provided on a pipe; and a control device for controlling the solenoid valve, wherein a heating coil is positioned to correspond to the type of the heating coil. The current transformer has n switches corresponding to each of the n switch actuating pieces, and 1 to n switch actuations when the heating coil is connected and attached to the current transformer. By piece The controller that receives the signal from the activated switch determines the type of heating coil, and turns on one or more predetermined solenoid valves corresponding to the heating coil to supply a predetermined amount of cooling liquid to the jacket. I have to.

<Operation> In the induction hardening apparatus according to the first aspect, one or more predetermined solenoid valves are opened depending on the cooling device to be supplied to the jacket. As a result, a predetermined amount of cooling liquid is supplied to the jacket.

In the induction hardening apparatus according to the second aspect, when the heating coil is mounted and connected to the current transformer, the switch actuating piece operates the switch, and the switch sends a signal to the control device. The control device determines the type of the heating coil from the received signal and turns on one or more predetermined solenoid valves so as to supply the jacket with a cooling liquid amount corresponding to the heating coil.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings. First
The figure is a block diagram of a first embodiment of the present invention. 2 to 4 are diagrams for explaining a second embodiment of the present invention, FIG. 2 is a block diagram, and FIGS. 3 and 4 are schematic diagrams of a heating coil and a current transformer. And the third
The drawing shows the state before the heating coil is connected and attached to the connection terminal of the current transformer, and FIG. 4 shows the state after the connection and attachment.

First, the first embodiment will be described.

As shown in FIG. 1, four branch pipes 31, 32, 33 and 34 branched from one cooling liquid supply main pipe 30 are connected to a jacket 20 for injecting the cooling liquid Q onto a work (not shown). Has been done. Solenoid valves 11, 12, 13 and 14 are provided in the middle of the branch pipes 31, 32, 33 and 34, respectively. It should be noted that one or more partition plates (not shown) are appropriately provided in the jacket 20 so that the sprayed cooling liquid provides appropriate cooling to the work.

The solenoid valves 11-14 are connected to the solenoid valve control board 40 via lead wires 41, 42, 43 and 44, respectively. The solenoid valve control board 40 is provided with a switch (not shown) that can turn on / off the solenoid valves 11 to 14, respectively.

Solenoid valves 11, 12, 13 and 14 each supply coolant at 10
It has the capacity to pass 0, 200, 400 and 800 liters.
Therefore, by energizing one or more solenoid valves, the total amount of the cooling liquid Q passed by the energized solenoid valves can be changed every minute.
100, 200, 300, 400, 500, 600, 700, 800, 900, 100
It can be selected from 0, 1100, 1200, 1300, 1400 and 1500l in 15 ways.

That is, the relationship between the desired flow rate and the solenoid valve to be excited to obtain this flow rate is as follows.

Flow rate (l / min) Open solenoid valve code 100 11 200 12 300 11, 12 400 13 500 11, 13 600 12, 13 700 11, 12, 13 800 14, 900 11, 14 1000 12, 14 1100 11, 12, , 14 1200 13, 14 1300 11, 13, 14 1400 12, 13, 14 1500 11, 12, 13, 14 The operation of this embodiment will be described below.

Solenoid valve so that the total amount of the cooling liquid Q supplied to the jacket 20 after the cooling liquid Q is supplied to the cooling liquid supply main pipe 30 becomes a desired value within the range of 100 l to 1500 l (100 l unit). Energize one or more of 11, 12, 13 and 14. Operate a switch (not shown) on the solenoid valve control panel 40
One or more solenoid valves among 14 are excited so that a desired total flow rate can be obtained. Then, the coolant Q supplied from the excited solenoid valve flows into the jacket 20 and is then jetted from the jacket 20 to a work (not shown).

Therefore, for example, when the amount of the cooling liquid Q to be injected from the jacket 20 is 1300 l / min, the solenoid valves 11, 13 and 14 may be opened by operating a switch (not shown) of the solenoid valve control panel 40.

Next, a second embodiment will be described.

In the first embodiment, the amount of the cooling liquid suitable for the work is determined according to the result of the test in advance, and the switch (not shown) of the solenoid valve control panel 40 is operated so as to supply the amount to the jacket 20. Then, a predetermined solenoid valve is made conductive.

However, in the second embodiment, when the high frequency heating coil corresponding to the work is attached to the current transformer, the high frequency heating coil is identified and the electromagnetic valve is automatically selected.

As shown in FIG. 2, the quencher 101 has a current transformer 9
The quenching machine 101 is equipped with a high frequency power supply 100
A high-frequency current is supplied from the electric wire 102 through the electric wire 102. Reference numeral 21 denotes a heating coil that is detachably attached to the current transformer 91, and is one of a plurality of heating coils that differ depending on the type of work.

A jacket that injects a quenching coolant onto a work (not shown)
In order to supply the cooling liquid Q to 20, the same solenoid valves 11 to 14 as those described in FIG. 1 are provided in the pipes 31 to 34 branched from the quenching cooling liquid supply main pipe 30, respectively. The solenoid valves 11 to 14 are connected to the control device 50 via lead wires 41 to 44, respectively. The control device 50 and the current transformer 91 are connected via a signal line 913. The high frequency power supply 100 and the control device 50 are connected via a signal line 914.

As shown in FIG. 3, the current transformer 91 has a pair of connection terminals 911 to which the heating coil 21 is connected and mounted, a switch mounting plate 912, and four switches S ₁ fixed to the switch mounting plate 912. ~ S ₄ are provided. Current transformer
The signal line 913 connecting the 91 and the control device 50, in detail, transmits the on / off signals of the switches S _{1 to} S ₄ to the control device 50.
It is a signal line sent to.

Further, as also shown in FIG. 3, the heating coil 21 has
Insulator 211 that grips the end of heating coil 21, and insulator 211
And a switch operating piece mounting plate 212 fixed to the switch operating piece mounting plate 212. Four switch operating pieces R _{1 to} R ₄ can be attached to the switch operating piece mounting plate 212 in accordance with the type of the heating coil 21. (In the figure, only two switch operating pieces R ₁ and R ₃ are attached, and these two pieces represent the type of the heating coil 21).

The switch actuating piece R ₁ to R ₄ and the switch S ₁ to S _4, when the heating coil 21 is connected mounted on the current transformer 91, switch operating piece R ₁ to R ₄ is a switch S ₁ to S ₄ Each is arranged so that it can be operated. Therefore, by attaching one to four switch actuating pieces at predetermined positions, 2 ⁴ -1, that is, 15 kinds of heating coils 21
Can represent the type of.

Next, the operation of this embodiment will be described.

A work (not shown) is mounted on the quenching machine 101, and a heating coil 21 corresponding to the work is connected and mounted on the current transformer 91. That is, as shown in FIG.
The heating coil 21 is connected and attached to the connection terminals 911, 911 of 91,
Switch actuating pieces R ₁ and R ₃ actuate switches S ₁ and S ₃ , respectively. The actuation of switches S ₁ and S ₃ is communicated to controller 50 via signal line 913. After receiving these signals and determining the type of the heating coil 21, the control device 50 selects the heating condition and cooling condition of the work corresponding to this heating coil 21, and the heating condition is supplied to the high frequency power supply 100 via the signal line 914. Communicate to.

Next, the high frequency power supply 100 to which the heating condition is transmitted sends a high frequency current to the high frequency heating coil 21 through the current transformer 91 for a predetermined time to heat the work. After this, the control device
50 is the lead wire 41 based on the cooling conditions selected above.
Through a through 44, a predetermined electromagnetic valve is turned on for a predetermined time to supply the cooling liquid to the jacket 20 to quench the work.

The above two embodiments use four solenoid valves 11-14 to produce 100 l
When supplying 100 liters to 1500 liters of cooling liquid per minute to the jacket 20, that is, induction heating that can easily or automatically set the supply amount of cooling liquid for 15 different workpieces. Although the input device has been described, the number of different works is not limited to 15, and therefore the number of solenoid valves is not limited to 4. Therefore, the amount of quenching cooling liquid that can be supplied by the induction hardening device is not limited to 100 l to 1500 l / min.

That is, generally speaking, when the number of solenoid valves having different capacities is n, (2 ⁿ -1) different amounts of cooling liquid can be supplied to the jacket 20.

<Effects of the Invention> As described above, the induction hardening apparatus according to the first aspect of the present invention has an appropriate cooling liquid passage capacity in the plurality of parallel branch pipes between the supply main pipe and the jacket after cooling for quenching. An electromagnetic valve is provided, and one or more predetermined electromagnetic valves are opened according to the amount of cooling liquid to be supplied to the jacket.

Therefore, in this induction hardening apparatus, the amount of cooling liquid supplied to the jacket can be easily set.

In addition, the induction hardening apparatus according to claim 2 includes a current transformer to which one heating coil among a plurality of heating coils different according to the type of work is connected and mounted, and a quenching cooling liquid supply main pipe. A plurality of parallel branch pipes provided between the jackets are provided with electromagnetic valves having an appropriate cooling liquid passage capacity, and a control device for controlling these electromagnetic valves, and the heating coil and the current transformer are Each has a switch actuating piece and a switch that sends a signal to the control device so that the type of the heating coil can be discriminated by the control device when the heating coil is attached and connected to the current transformer, and the control device responds to this signal. To turn on the solenoid valve.

Therefore, in this induction hardening apparatus, when the heating coil corresponding to the work is attached and connected to the current transformer, after the work is heated, a predetermined electromagnetic valve is turned on, and a predetermined amount of cooling liquid corresponding to the work is applied to the human. It has the advantage that it is automatically fed to the jacket without intervention.

[Brief description of drawings]

FIG. 1 is a block diagram of the first embodiment of the present invention. 2 to 4 are drawings for explaining a second embodiment of the present invention, and FIG. 2 is a block diagram, FIG. 3 and FIG.
The figure is a schematic view of the heating coil and the current transformer, FIG. 3 shows a state before the heating coil is connected and attached to the connection terminal of the current transformer, and FIG. 4 shows a state after the connection attachment. FIG. 5 is a block diagram of a quenching cooling liquid supply system of a conventional induction hardening apparatus. 11-14 ...... solenoid valve, 20 ...... jacket, 21 ...... heating coil, 30 ...... main supply line, 31 to 34 ...... branch pipe, 50 ...... controller, 91 ...... current transformer, R ₁ to R ₄ ...... Switch operating piece, S _{1 to} S ₄ ...... Switch, Q …… Coolant.

Claims (2)

[Scope of utility model registration request] 1. A quenching coolant supply main pipe, a jacket for injecting the quenching coolant onto a workpiece, a plurality of parallel branch pipes provided between the supply main pipe and the jacket, and an appropriate coolant passage. A solenoid valve having a capacity and provided in the branch pipe, and 1 depending on the amount of cooling liquid to be supplied to the jacket.
An induction hardening device characterized by opening one or more predetermined solenoid valves. 2. A current transformer to which one heating coil among a plurality of heating coils different according to the type of work is connected and mounted, a quenching coolant supply main pipe, and a quenching coolant. A jacket for injecting into the pipe, a plurality of parallel branch pipes provided between the main supply pipe and the jacket, an electromagnetic valve provided on the branch pipe having an appropriate cooling liquid passage capacity, and a control device for controlling the electromagnetic valve. And a heating coil having 1 to n switch actuating pieces positioned corresponding to the type of the heating coil, and the current transformer has n switch actuating pieces. The control device, which has n switches corresponding to each of them, receives a signal from a switch operated by 1 to n switch actuating pieces when the heating coil is connected and attached to the current transformer. Type to determine, induction hardening apparatus and supplying its correspond to the heating coil is made conductive one or more predetermined electromagnetic valve a predetermined amount of cooling fluid to the jacket.