JPH0148338B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heating device that heats a billet moving inside a coil by electromagnetic induction, a billet carrying device arranged on the billet inlet side of the heating device and feeding the billet into the heating device, and a heating device. This invention relates to a billet heater consisting of main devices such as a billet unloading device which is placed on the billet exit side and sends out the heated billet to the next processing step.

In addition to the main devices such as the heating device, the billet loading device, and the billet unloading device, this type of billet heater also includes a transformer and a capacitor provided for supplying power to the heating device and driving the billet loading device and billet unloading device. However, when installing a billet heater, each of the above devices is functionally coordinated and integrated as much as possible, so that the space it occupies can be saved. The requirement is to save as much as possible.

In order to save the space occupied by this type of conventional billet heater, as shown in FIGS. A configuration is adopted in which power equipment including a transformer 3, a capacitor 2, a switching control device 4, etc. is housed in the lower part of the billet heater mount 1. In a billet heater having such an arrangement, a plurality of unheated billets are placed and delivered one by one onto a billet holder 7 by a pusher device 6 from a loading chute 5 having an inclined surface. 9 into the heating device 8. The billet fed into the heating device 8 is held at a predetermined position inside the heating device 8 and heated by a stopper device 10 disposed near the outlet of the heating device 8. In this case, two or more billets usually remain in the heating device 8 at any time. After the billet has been heated, the stopper device 10 moves it to a position where there is no problem in carrying out the billet, and then the pusher device 9 pushes out the billet by unheated billet heaters that are successively fed into the billet transfer device 11, where it is moved to the billet transfer device 11, where it is driven by a geared motor with a brake. The billet is transported to the next processing step on the billet transport device 11 driven by the billet 12.

However, even in the case of a billet that is heated in succession as described above, there are cases where the heating time is shorter than that of a normal billet, such as when the billet heater is started, or the billet is heated first, or when the heating device In the case of an accidental low temperature due to poor temperature control, billets are not heated as expected and are therefore unsuitable for being sent to the next processing step. In such cases, conventional billet heaters detect heating defects at appropriate locations, such as near the billet outlet of the heating device, using commonly used temperature detection means, such as thermocouples, and detect them before proceeding to the next processing step. The method used is to remove and collect the waste outside the line. In this case, the means for removing and recovering billets that are underheated is usually installed between the billet heater and the equipment for the next processing process, such as a press machine. Economic and technical disadvantages arise, such as the length of the processing line in which the means, press equipment, etc. are disposed, which significantly increases the space for installing equipment and complicates the layout of the factory.

In view of the above-mentioned drawbacks caused by the arrangement of the defective billet removal and recovery means in the conventional billet processing line, the present invention integrates the billet heating mechanism and the defective billet removal and recovery means both functionally and structurally. Therefore, it is an object of the present invention to provide a billet heater that can significantly reduce the space occupied by the equipment.

The above-mentioned object is to provide the billet heater according to the present invention, in which a means for rejecting billets detected by a heating defect detection device is connected to the billet unloading device, and the defective billets are removed from the rejecting means toward the billet inlet of the heating device. A collecting device for transporting the billets is provided almost parallel to the heating device, and a storage field for receiving and storing the defective billets from the terminal end of the collecting device is provided near the billet carrying device. This is achieved by removing, collecting and storing the waste from the outlet side to the inlet side.

Next, details of the present invention will be explained based on embodiments shown in the drawings.

In the billet heater shown in FIGS. 3 and 4, there is a heating device 8 that heats the billet moving inside the coil, a billet loading device 9 that is placed on the billet inlet side of the heating device and feeds the billet into the heating device 8, and a heating device 9 that feeds the billet into the heating device 8. A transformer 3, a capacitor 2, and an opening/closing control device 4 are installed at the bottom of the billet heater pedestal 1, where a billet unloading device 11 is arranged on the billet exit side of the coil and sends out the heated billet to the next processing step, and the auxiliary devices of the above-mentioned devices are arranged. The billet is carried from the carry-in chute 5 onto the billet holder 7 by the pusher device 9, and is then fed into the heating device 8 by the pusher device 9, where it is heated by the stopper device 10. After being heated while being held in a predetermined position of the device and heated to a predetermined temperature, the pusher device 9
As shown in FIG. Second
This is exactly the same as the case of the conventional billet heater explained in the figure.

However, in FIGS. 3 and 4, the billet loading device 9, the heating device 8, and the billet unloading device 1 are
A billet recovery device 1 that conveys billets in a direction opposite to the normal billet traveling direction in parallel to 1.
5, a front billet transfer device 14 as a means for removing billets from the billet unloading device 11 to the billet recovery device 15, and a recovery device provided on the billet heater frame behind the billet recovery device 15 and the billet loading device 9. A rear billet transfer device 18 is disposed between the billet storage field 19 and the billet transfer device 18 as a means for discharging the collected billets from the billet recovery device 15 to the storage field 19.

If the billet sent out from the heating device 8 in the billet heater configured as described above is defective in heating, a signal is sent from a defective heating billet detection mechanism (not shown), such as a thermocouple, installed in a normal billet heater. After receiving the defective billet, when the arrival of the defective billet is confirmed by a detection device such as a photoelectric switch 13 placed on the side of the billet unloading device 11, the geared motor 12 with a brake for driving the billet unloading device is stopped.
A forward billet transfer device 14 disposed between the billet unloading device 11 and the billet recovery device 15 operates to transfer the billet onto the billet recovery device 15. Subsequently, the geared motor 16 with a driving brake of the billet collecting device 15 is operated to transport the billet backward on the heater mount 1 in the opposite direction to the normal billet traveling direction. When the arrival of the billet is confirmed by a detection device such as a photoelectric switch 17 placed on the side near the tip of the billet recovery device 15 in the direction of movement, the geared motor 16 with a brake that is in operation is stopped, and the billet recovery device 15 and the billet recovery device 15 are stopped. A rear billet transfer device disposed between the recovered billet storage area 19 operates and the billet is transferred to the storage area 19. The billets thus collected are naturally cooled in the storage area 19 and then transported to a predetermined location by a forklift or the like. As described above, in the billet heater of the present invention, the means for removing poorly heated billets, the recovery device, and the temporary storage area are arranged on the same frame as the billet heater itself, which is very effective in reducing the installation area of the entire equipment.

FIG. 5 shows details of the roller mechanism of the billet collecting device 15 of the present invention, which is essentially the same as the roller mechanism of the billet unloading device of a conventional billet heater. That is, a sprocket 23 is connected to one end of a roller 26 which is pivotally supported by a pillow block 25 between grooved frames 22 arranged on both sides, and the sprockets 23 of each roller 26 are connected by a chain and driven by a geared motor. Billet 2 on roller
Transport 1.

Figure 6 shows the billet unloading device 11 for removing defective billets.
This is a schematic diagram showing the relationship between the billet transfer device 14, which is provided between the devices 11 and 15, and the devices 11 and 15 in order to remove the billets from the billet and transfer them to the billet recovery device 15. The transfer element 32 disposed on the shaft 31 is moved upward by a slit provided in the groove frame 22 on the side where the sprocket 23 is not present, of the groove frame 22 that supports the roller 26 of the billet unloading device 11 from both sides. It is possible to penetrate below the upper surface of the roller 26. On the other hand, between the billet transfer device 14 and the billet recovery device 15, a transition platform 35 having a slope is arranged so that billets can easily roll toward the billet recovery device 15. In the above-described configuration, a normal billet is carried out on the rollers of the billet carrying-out device 11 without coming into contact with the transfer element 32, but as already explained, when a defective billet reaches a predetermined position on the billet carrying-out device 11, In response to the detection signal, the air cylinder 34 connected to one end of the shaft 31 of the transfer device 14 is operated, the shaft 31 rotates, and the transfer element 32 scoops up the billet on the billet unloading device 11 and lifts it by a predetermined angle. As shown in FIG. 7, the lifted billet 21 rolls on the surface of the transfer element 32 and the transfer table 35 and rides on the roller 26 of the billet recovery device 15. The billet 21 mounted on the rollers of the billet recovery device 15 is conveyed by the billet recovery device 15 on the billet pedestal 1 toward the recovery billet storage area 19 at the rear. The geared motor 12 with a brake for driving the billet recovery device 15, in which the billet 21 that has reached the storage area 19 is confirmed by the charging switch 21, is stopped. At this time, the transfer element 32 of the rear transfer device 18, which has the same structure and function as the front transfer device, scoops up the recovered billets on the billet recovery device 15 as the shaft 33 rotates, as shown in FIG. After lifting at an angle of 100 degrees, rolling the collected billet reservoir with a slope. The recovered billet 21 transferred to the storage field 19 is stored until it cools down naturally. In this way, the defective billets are completely recovered without leaving the billet heater frame 1.

By configuring the present invention as explained above, the installation area of the billet heating equipment as a whole can be significantly reduced, and the process for disposing of defective billets can be simplified, allowing the billets to be naturally cooled in the storage area. Since the material is then transported to a predetermined location, it has the advantage of eliminating dangerous work involving handling high-temperature objects.

[Brief explanation of drawings]

Figures 1 and 2 are top and side views showing the outline of the arrangement of each device of a conventional billet heater;
4 and 4 are top and side views showing the outline of the arrangement of each device of a billet heater equipped with a defective billet removal and recovery means of the present invention, and FIG. 5 is a diagram showing the roller mechanism of the defective billet recovery device in the billet heater of the present invention. 6 is a front view showing the details, and FIG. 6 is a schematic view showing the position and functional relationship between the billet unloading device, the billet collecting device, and the billet transferring device disposed between the devices in the billet heater of the present invention, and FIG. FIG. 8 each represents a schematic diagram illustrating the function of the transfer element of the billet transfer device of the present invention. DESCRIPTION OF SYMBOLS 1... Billet heater mount, 2... Capacitor, 3... Transformer, 4... Opening/closing control device, 5...
... Carrying chute, 6... Knocker device, 7... Billet holder, 8... Heating device, 9... Pusher device, 10... Stopper device, 11... Billet unloading device, 12, 15... Geared motor with brake , 13... Charging switch, 14, 18... Billet transfer device, 15... Billet recovery device, 19
...Bilet Reservoir, 26... Laura, 31...
Axis of billet transfer device, 32...Transfer element, 33...
...Bearing, 34...Air cylinder.

Claims (1)

[Claims] 1. A heating device that heats a billet moving inside a coil by electromagnetic induction, a billet loading device that is placed on the billet inlet side of the heating device and feeds the billet into the heating device, and a billet outlet side of the heating device. In the billet heater, which consists of main devices such as a billet unloading device which is disposed in the billet and sends out the heated billet to the next processing step, a removing means for rejecting the billet detected by the heating defect detection device is connected to the billet unloading device, A recovery device for transporting defective billets from the removing means toward the billet inlet of the heating device is provided substantially parallel to the heating device, and a storage field for receiving and storing the defective billets from the terminal end of the recovery device is provided at the billet carrying field. By providing the billet near the device, the billet to be collected is removed and stored from the outlet side to the inlet side of the heating device. are connected to each other, and the other end is provided with a transfer element that can enter between the rollers of the billet unloading device or the billet collecting device below the upper surface of the rollers, and the shaft is rotated by a suitable power device. a billet transfer device for lifting the transfer element to a predetermined position and transferring the billet on an appropriate slope to the opposite side of the roller with respect to the axis; A billet heater characterized in that the transfer device is disposed between the billet collecting device and the billet storage device.