JPS6046792B2 - Automatic induction heat treatment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an automatic high-frequency heat treatment method for sequentially heat-treating (quenching) two locations of a single heat-treated product at different locations by switching the heating coils of a single high-frequency generator. There are some related to improvements.

Conventional automatic high-frequency heat treatment equipment uses one high-frequency generator to sequentially heat-treat two locations on one heat-treated product by switching the heating coil, which makes efficient use of power supply equipment of a certain capacity. It is done in order to

However, in the past, when a single heat-treated product had two locations that required heat treatment, and each of these locations needed to be heated at a different location, the products to be heat-treated at each location were brought in and taken out at the same time. Therefore, it was not possible to heat any position during the transportation time, and it was not possible to increase the operating rate of the power supply equipment beyond a certain level. To show this in a drawing, the product to be heat-treated is subjected to heat treatment at location a at location A in Figure 1, and then the product to be heat-treated at location B waits at both locations until the heat treatment is completed at location A and B. When both heat treatments at both positions are completed, they are moved all at once, and the item at position A is moved to position B, and the item at position B is discharged, while the next new item to be heat treated is sent to position A. Therefore, in this cycle, as shown in Figure 2, heating at positions A and B is performed in sequence, and unless heating and cooling at all positions is completed, the item to be heat-treated is transported to the next position. This was impossible, and heating was not performed at any position during this transport time T, making it impossible to increase the operating efficiency of the power supply equipment beyond a certain level.
This invention was developed in view of the above-mentioned conventional example, and in particular, there are two parts that require heat treatment in a product to be heat-treated using a high-frequency heat treatment device, and each of these parts needs to be heated at a different location. The present invention aims to provide an effective automatic processing method for heat-treated items to increase the operating rate of high-frequency power equipment.

The structure of the present invention will be described below with reference to specific embodiments shown in FIGS. 3 to 5.

FIG. 3 is a block diagram of a high-frequency heat treatment apparatus that sequentially heats two locations by switching.

1A and 1B are coils for heating two different parts of the product to be heat treated, 2A and 2B are output transformers that convert high frequency power from a high frequency generator into low voltage and large current, 3A,
3B is a matching board that performs a tuning action, 4 is a switching device, 5 is a motor generator that rotates a high frequency generator using an electric motor, and 6 is a high voltage board that transmits the received high voltage to 5.

Next, FIG. 4 shows a conveyance mechanism for continuously heating two different locations of a heat-treated product using the high-frequency heat treatment apparatus shown in FIG. 3. Reference numeral 7 denotes an entrance-side conveyor that forms a carrying-in means together with a conveying means 9A, which will be described later. 8 indicates an insertion means for supplying a certain number of heat-treated products. 9A and 9B indicate heating points and discharge of heat-treated products at respective positions. It is a means of transportation that transports objects to a certain point.

10A and 10B are heat-treated products and coils 1A and 1 during transportation.
This is an escape means to prevent contact with B. 11A, 11
B is a means for grasping the heat-treated product during transportation.

Reference numerals 12A and 12B are means for rotating the heat-treated product for uniformly applying heat treatment on the circumference.

13 is the difference in the timing of conveyance between the two positions A and B. This is a play area for adjustment.

14 is a conveying means in this section.

Reference numeral 15 denotes an insertion means for supplying the heat-treated product from the idle space 13 to the position B.

Reference numeral 16 denotes an exit side conveyor that forms a conveyance means together with the aforementioned conveyance means 9B.

17A and 17B are! This is a heat-treated product.

FIG. 5 is a cycle diagram for explaining the operation of the conveyance mechanism shown in FIG. 4. TlA, TlB are heating times, T2A, T
2B is water cooling time, T3A, Tmi is transportation of heat-treated products,
This is the time for stopping and starting rotation, for attaching and detaching using the gripping means 11A and 11B, and for moving the coil to the heating point. T4 is the time required to switch heating from the coil in position A to position B, and T5 is the cycle time in this mechanism. In the above configuration, at position A (preceding treatment position), the product to be heat treated 17A is first heated for TlA time and then finished;
At this position, cooling water is released from around the heat-treated product to begin cooling.

At the same time, the coil 1A and the output transformer 2A are separated from the product to be heat treated by the escape means 10A. After cooling is completed, the rotating heat-treated product is stopped from rotating by the rotating means 12A. Next, the conveying means 9A conveys the heat-treated product and the next heat-treated unfinished article already supplied by the conveying means 8 to the A position and play area 13, and the gripping means 11A completes the gripping operation, and the conveying means 9A returns to the conveyance starting point. At position A, as soon as the coil 1A approaches the unfinished heat-treated product, rotation is started by the rotating means 12A, and heating begins. The same operation as above is performed at position B (following processing position), and the total cycle time T is also the same, but because coils 1A and 1B are alternately switched and heated, there is a certain period of cycle shift. arise.

This deviation is caused by the play section 13, which allows the discharge at position A,
Carrying to position B is carried out without interference. That is, at the beginning of the operation, the most advanced article to be heat-treated on the entrance side conveyor 7 is inserted onto the conveying means 9A by the insertion means 8, and then the article to be heated is inserted into the conveying means 9A.
A moves forward and feeds the first heat-treated item to position A, and the gripping means 11A sets it at the heating position.Then, the rotation means 12A gives rotation, and the escape means 10A lowers the output transformer 2A and the coil 1A. and heats the first product to be heat treated.

During this time, the gripping means 11A and the conveying means 9A are retracted and returned, and the next article to be heat treated is transferred from the entrance side conveyor 7 to the insertion means 3.
It is inserted and ready to stand by in that state. When the heating at the A position is completed, the coil 1A and the output transformer 2A are raised and retracted by the escape means 10A, and cooling is started.

On the other hand, when the heating at position A is completed, the power source of the high frequency generator is switched to the heating coil 1B at position B, but at this time, the product to be heat treated is not supplied to position B, so it is idle.

When the cooling at the A position is completed, the rotating means 12A stops, the heat-treated product is released from the heating position, and the conveying means 9A moves forward to send out the first heat-treated product to the play area 13, and at the same time the next heat-treated product is moved forward. A new article to be heat-treated is attached to the heating position A, and after the attachment, the conveying means 9A returns to the backward position again to prepare for the next step and wait.

On the other hand, the first heat-treated product sent to the play zone 13 is
Immediately, it is transported by the transport means 14 to just below the insertion means 15, and at this time, since the transport means 9B is at the retreated position, it is inserted thereon and stands by.

Then, when the heating by the above-described idle operation at position B is completed, the high frequency power source is switched to the heating coil 1A at position A, and heating of the next article to be heat-treated is started at position A.
On the other hand, after the heating of the above-mentioned idle operation is performed at position B, cooling of the idle operation is performed, and when this is completed, the conveying means 9
B moves forward, and the first article to be heat treated is installed at position B.
Immediately after the heating of the next heat-treated article at the A position is completed, the heating at the B position is started.

After this, the operation becomes continuous and the above-mentioned operation is repeated. In short, when continuous operation begins, during the heating operation at the A position, cooling and evacuation at the B position, and the installation of the next heat-treated product from the play area are performed, and during the heating operation at the B position, the A position The high-frequency heating equipment heats A and B continuously, alternately, to maximize the operating rate. This is possible.

As explained above, the present invention provides two
Heating coils suitable for heating the locations are installed separately at the preceding processing position and the subsequent processing position, the products to be heat-treated are sequentially transferred to both processing positions, and high-frequency power is supplied to the heating coils at the two locations. This is an automatic high-frequency heat treatment method in which heating and cooling are performed by switching the high-frequency generator on the stand, and an idle section is provided between the preceding processing position and the following processing position, and unfinished heat-treated products are sequentially processed in advance. The heat-treated products are transported to the post-processing position during heat treatment, and the heat-treated products are sequentially transported from the post-processing position to the post-processing position.
A heat-treated product that has been carried out during heat treatment at a preceding processing position and has been heat-treated at the preceding processing position is carried out to an idle area during heat treatment at a subsequent processing position, and the heat-treated article that has been carried out to the idle area. is transported to the subsequent processing position during heat treatment at the preceding processing position, and by installing the play section, the loading and unloading of the heat-treated products to the preceding processing position and the subsequent processing position can be made independent. The present invention relates to an automatic high-frequency heat treatment method characterized in that the method is operated by:

The high-frequency heat treatment apparatus used in this invention includes a high-voltage panel that transmits the received high voltage, a motor generator that receives power transmitted from the high-voltage panel and rotates a high-frequency generator using an electric motor, a switching device, and a plurality of matching devices. It consists of an output transformer and each coil, and the entrance side conveyor is equipped with a means for inserting the article to be heat-treated, and each of the coil means A and B of the high-frequency heat treatment apparatus is provided with a gripping means, a rotation means, and an escape means. An independent transport device and transfer device are arranged between each work position. In other words, since each of the heating positions A and B has a separate conveying device, during the heating time of one, the other can perform operations until the next item to be heat-treated can be inserted and heated. The latter can be heated immediately after heating is completed. This is AI: d. This is made possible by adjusting the timing of the transfer of the intermediate idle section at position B. In other words, when the heat-treated product at position A is transported to the idle area,
Since the previous heat-treated product has been transferred from 13A to 13B, the timing is determined so that it can be discharged to 13A, and when it is inserted into position B by 15, the heat-treated product is always in 13B. Therefore, both positions A and B are heated alternately and without interruption, and the operating efficiency of the power supply equipment is greatly improved. That is, according to this conveyance device,
During the time that one part of one heat-treated product is being heated at one position, the other heat-treated product has completed its various operations at another position until it can be brought to the heating point and heated. When the heating time is over, it is possible to immediately heat another part at the latter position, and during this time, the former heat-treated product is discharged, and various operations are carried out until the next heat-treated product can be brought in and heated. Therefore, by sequentially switching the heating coils in one high-frequency generator, continuous heating is possible7, and the operating efficiency of the power supply equipment is greatly improved. Although we have given an example where one heat-treated product is heated at each heating position, even if two or more products can be heated at the same time, they can be handled in exactly the same way if they are transported simultaneously. Needless to say.

[Brief explanation of the drawing]

Figures 1 and 2 are drawings and cycle diagrams showing the movement of the heat-treated product in a conventional high-frequency heat treatment apparatus, respectively. Figure 3 is a block diagram showing the high-frequency heat treatment apparatus applied to the method of this invention. FIG. 5 is a drawing showing a conveyance mechanism of the automatic high-frequency heat treatment method according to the invention, and FIG. 5 is a cycle diagram of the apparatus according to the method of the invention. 1A, 1B...Product to be heat treated, 2A, 2B...Output transformer, 3A, 3B...Matching panel, 4...Switcher, 5...Motor generator, 6...High pressure panel, 7...Inlet side conveyor, 8...Insertion means, 9A, 9B...Transportation means, 10A,
10B... Escape means, 11A, 11B... Grasp means,
12A, 12B: Heat-treated product rotating means, 13: Play section, 14: Transfer means, 15: Insertion means, 16:
Exit side conveyor, 17A, 17B...Products to be heat treated.

Claims (1)

[Claims] 1. Heating coils suitable for heating two locations of one heat-treated product are installed separately at a preceding processing position and a subsequent processing position, and the heat-treated product is sequentially transferred to both processing positions, and then heated to the above two heating coils. An automatic high-frequency heat treatment method in which the supply of high-frequency power is heated and cooled by switching one high-frequency generator, and an idle section is provided between a preceding treatment position and a subsequent treatment position. , unfinished heat-treated products are carried in sequentially to the preceding processing position during heat treatment at the subsequent processing position, heat-treated products are carried out sequentially from the subsequent processing position during heat treatment at the preceding processing position, and heat-treated at the preceding processing position. The products to be heat-treated that have been subjected to heat treatment are transported to the idle area during heat treatment at the subsequent processing position, and the products to be heat-treated that have been transported to the idle area are transported to the subsequent processing position during heat treatment at the preceding treatment position. An automatic high-frequency heat treatment method, characterized in that by installing the idle section, the loading and unloading of the heat-treated articles to and from the preceding treatment position and the subsequent treatment position are operated independently.