JPS5848384A - Induction heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an induction heating device for heating objects such as not only iron and non-ferrous metals but also round and square billets.

Conventionally, this type of induction heating apparatus is a water-cooled type that corresponds to the length direction of the object to be heated and corresponds to the cross-sectional shape of the object to be heated, as illustrated in the case of a round billet in Figures 1 to 2. The inner surface of the solenoid coil 2 is lined with a refractory material 3.]
A skid rail 4 supporting the heated object l at the bottom of the skid rail 4
It has a structure in which a plurality of objects to be heated 1 are arranged on the skid rail 4, and a supply device fIt (not shown) is arranged.
It is supplied sequentially from K to PM side, and is set so that the predetermined heating capacity, temperature, and inner and outer surfaces have a predetermined temperature tolerance, and is heated to the predetermined conditions by the coil length LO, the supplied power, and the frequency. Then, the OU outside the coil from the unillustrated extraction device fiiK! It is discharged to the side for use. In the figure, reference numeral 5 denotes an insulating support, and the entire device is fixed to a base 6.

Further, let a be the shape of the heated object 1 in the case of a round billet, and let b be the inner diameter of the corresponding solenoid coil 2.

However, in the conventional apparatus described above, the object to be heated 10@
The feeder is not shown, but typically the lN of the device
From 11i, in the case of a bushing type using a cylinder or IN@ of heated object l and multiple coils, the method using pinch rollers at two points, Y1 in front of the coil and between the coils, has the following operational disadvantages. Ta.

0) When billets are used for forging, when heated to a certain temperature, multiple billets may fuse together due to the pressure of being pressed one after another within the coil. Painting or installing a peeling device, or artificially (
It is necessary to peel it off.

(b) It is necessary to discharge the billet inside the coil when stopping work, changing material dimensions, or replacing the coil.It is necessary to discharge the billet inside the coil using a dummy rod or manually.

Since the end faces of Pi billets are not necessarily perpendicular and have burrs and curves, conventional methods cannot move smoothly within the coil, forming bridges due to compression, which may damage the coil.

2) As the heavy billet slides on the skid rail, the rail wears out due to friction and becomes a consumable item during the wing period.

2) When the work is completed, both the pusher method and the pinch roller method cannot effectively utilize the last billet (1), which poses difficulties in energy saving and processing of the billet retained in the coil.

This invention was made in order to solve the above-mentioned nine drawbacks of the conventional apparatus, and in the induction heating apparatus 11 for the object to be heated, it is possible to sequentially walk the billet f without affecting the heating efficiency in an extremely limited space. The present invention provides an induction heating device fl tube configured to be transferred by beam method.

Embodiments of the present invention will be described in detail below with reference to FIGS. 3 to 8. Figure 3 (b) is a cross-sectional view of a main part showing an embodiment according to the present invention, in which the inner diameter of the coil 2' is determined for each billet aK having the same diameter as in the conventional device.

4' is a billet support rail, which is supported by the refractory 3, and directly below it is a pair of walking beams 10.1 which are determined to have the minimum time shore according to the nuclear thermal conditions.
0 is placed, and the refractory 3 is slightly on both the sides and the bottom! 2!
It is arranged with a face.

At this time, a pair of walking beam comrades set the rep plate on the 6th
As shown in the figure or the operation diagram of the seventh factor, by connecting the feed pitch at intervals less than a constant feed pitch, scale in heating for iron, for example, accumulates at the bottom, and this lip plate feeds the heated billet in the discharge direction like a pipette. It is something that will be released.

Here, the inner diameter 0 of the coil 2' in the direction of the assembly axis is determined according to the above-mentioned conditions, and by forming the coil into a rectangular shape as shown in the figure, a walking beam of 10.10 can be achieved without impairing the coil efficiency. Power can be distributed.

Incidentally, the coil 2' may be configured to have a shape that matches the shape of the refractory 3, as shown in Figure 4.

In other words, the frame diagram 3 (a) is an example of the case of a round billet, where the round billet is placed on the support rail 4', and the walking beam 10 is placed at the time shore C position in Figures M6 to 7. The stripe 31 (b) is a round billet supported by the walking beam 10 and transferred at a constant pitch by the Demensilon BK shown in FIGS. 6 and 7.

Figure 5 is a vertical cross-sectional view of the entire sieve conduction heating device according to the present invention, and the coil 2I has an insulator 5 on the base 6 as in the conventional device.
Supported through. Also billet support rail 4'
(Although not shown in the figure, both ends of the coil are supported) and a walking beam 1o.

The lO is attached to the beam 8 at both ends of the coil by means of support fittings 7. Although not shown, the round billet H% to be heated object 1 is fed from the IN direction to a multi-material feeding device, and the billets are sequentially transferred in a soft touch state.
It is taken out in the OUT direction by a discharge mechanism (not shown) and used for a predetermined purpose.

In the above device, the walking beams 10, 10 are the sixth
Figure, no #! 7 or as shown in Fig. 8, the billet on the support rail 4' is lifted from the support rail 4' by the Dimentum 1 mm, and by the next treatment, the billet VCTo on the support rail 4' is lifted horizontally by the dimension B by 1 pitch. The billet was moved, and the billet was moved again by the walking beam 1G%1.
$ is placed on support rail 4' from G, and Demenshiron D
[K] return to the original position), with repeated stiff movements,
The billet is moved one pitch at a time with a soft touch.

In the case of the above-mentioned movement mechanism line and cylinder combination,
The shape will be a rectangle as shown in Figure 6, but if it is performed using a mechanical mechanism, there will be a slight curvature at the right angles as shown in Figure 7, but by reducing this curvature, it will be possible to create a walking beam of 10.10tj. Any method of operation may be used as long as the mechanism is adjusted so that friction with the billet 1 does not occur when the billet is transferred onto the support rail 4'.

As described above in detail, according to the present invention, all the drawbacks of conventional devices are solved and eleven-dimensional induction heating can be performed.

In addition, in both Fig. 2 and Fig. 5, the coil is divided into two types.
Although an example has been described, this is only an example, and the number of coils is determined by the heating characteristics of the billet and other conditions, and one or more coils may be set as appropriate. Also, as shown in Figure #I8, the walking beam O
It can be set within a range that does not deviate from the operational dimension.

[Brief explanation of the drawing]

Figure 1 shows the conventional device 1! Cross-sectional view of main parts showing an example, 2nd
Figure 2 is a vertical cross-sectional view of the entire device showing an example of the conventional device, and Figure 4 is a sectional view of the main parts showing an example of the device according to the present invention and its operating state. Figure 5 is a longitudinal cross-sectional view of the entire device showing another embodiment of the invention, and Figures 6 to 7 are one example of a walking beam according to Jin's invention. FIG. 8 is a dimension diagram showing another application example of the present invention. 1... Heated object, 2.2'... Solenoid coil, 3... Refractory, 4.4'...
...Support rail, 5...Insulator, 6...
・Pace, 7... Support metal fittings, 8... Beam, 10... Walking beam, LO...
...Coil length, toe-bit diameter, b...
・・・・Inner diameter of the coil, C：Inner diameter of the coil in the vertical axis direction. Patent applicant Nihon Ajax Magnesar
Mick Co., Ltd. Agent Patent Attorney Hideaki Sato

Claims (1)

[Claims] A water-cooled solenoid coil corresponding to the cross-sectional shape of the object to be heated in the longitudinal direction of the object to be heated, a refractory lined on the inner surface of the solenoid coil, and a support rail supporting the object to be heated under the refractory. In the heating device, a pair of walking beams are arranged with a slight gap directly under the support rail, and the object to be heated placed on the support rail is sequentially transferred at a constant pitch by the walking beam. An induction heating device characterized by being configured to.