JPS59122885A - 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 Conventionally, there has been a device of this type as shown in FIG. In the figure, 11) is a heated material to be forged.

f21 is a conveyor that carries the material to be heated (1) and conveys it to the pinch roller (3); (4] is a heating coil that heats the material to be heated; G11) is the end of the heating coil (4);
(5) is the heated material pushed out from the pinch (3) +11
is the skid rail that slides and moves. (Foundation) is the horizontal part of the skid rail (6), @Oi is the inclined chute part of the skid rail (5).

(6) is a pedestal.

Next, the operation will be explained. The material to be heated (1) is placed on the conveyor (2) and sent to the pinch roller (3),
The material to be heated 11) is pushed out onto the skid rail (5) by the pinch roller (3). The materials to be heated 111 are pushed out one after another by the pinch rollers (3), so they continuously slide on the skid rails (5) and are fed into the heating coils (4) one after another. The material to be heated (1) is heated by a heating coil (4
The heated material +1+ reaches a predetermined temperature while moving in the horizontal portion f1υ. The conventional equipment is the same as for hot forging, and in hot forging, the material to be heated (11) is heated to a high temperature of 1150°C to 11!!50°C.Therefore, the material to be heated (1) is in the non-magnetic region. Since the temperature drop due to heat dissipation from the casing is large, an inclined chute is provided in the heating coil (4), where the heated material +111/'i slides down one by one and is sent to a press device (not shown). was completed.

However, when this is used for warm forging, the heating temperature is 770° C. or lower, and the heated material +11 tries to slide down the inclined chute part (2) while being magnetized.

However, since an electromagnetic attraction force acts on the heated materials il+, the heated materials Il+ are not carried out one by one.

A group of heated materials (1) is carried out only when the gravity of the plurality of heated materials + 13 overcomes one magnetic attraction force.

As mentioned above, with conventional equipment, multiple heated materials are sent at once to the press, etc., which is the process after heating, which increases the amount of waste material and makes automatic forging impossible. There were drawbacks.

This invention was made in order to eliminate the drawbacks of the conventional ones as described above, and by extending the horizontal part of the skid rail, the diagonal chute part is installed outside the heating coil, and the heated material can be heated one by one. The object of the present invention is to provide an induction heating device that can be supplied to a press or the like. An embodiment of the present invention will be described below with reference to FIG. 2.

In the figure, (5) is the skid rail, and the horizontal part 1
5υ extends outward from the end (2) of the heating coil (4), and an inclined chute is provided at its tip.

The position where the heated material H1 falls is set to a distance where the electromagnetic attraction force due to the influence of the magnetic flux in the coil is smaller than the falling edge of a single heated material. The rest is the same as the conventional system shown in FIG. 1, so the explanation will be omitted.

The material to be heated (1) is placed on a comparator (21) and sent to the pinch roller (81), and the material to be heated +11 is pushed onto the skin trail (5) by the pinch roller +a+.

The material to be heated (1) is sequentially moved by the material to be heated +11 pushed out from behind, sliding on the top of the skid rail (5), and is fed into the heating coil (4). The material to be heated (1) is heated and magnetized by the alternating magnetic flux generated within the heating coil (4). Magnetized heated material (1) A single heated material with at least the lightest mutual magnetic attraction force (1)
By extending the horizontal part to a position where the falling edge of the blade is also small, the influence of leakage magnetic flux is reduced, so the material to be heated (1)/
/i pieces fall down the inclined chute section 152 one by one and are sent to a press or the like in the ninth step.

The heated material 111 is sent out from the heating coil (4) and cooled, but unlike hot forging, the heating temperature is low, so even if it is exposed to the atmosphere after heating, the temperature decreases little (skid rail t5) Even if the horizontal portion t51)' is extended, this heating effect will not be impaired.

The weight of the heated material Il+ is small (for example, the diameter is 80 mm)
aa* or less) If the transfer speed is slow, the effect of heat radiation will occur. In that case, as shown in FIG. 8, a heat insulating hood (7) is enclosed in a tunnel shape extending from the heating end end (2) of the heating coil 14) to the inclined chute portion of the skid rail (5). As shown in Fig. 4, a short ring (8) is provided at the heating end end (b) of the heating coil (4) to reduce the influence of leakage magnetic flux outside the coil, and to reduce the influence of leakage magnetic flux outside the coil. ) is also necessary.

As described above, according to the present invention, the influence of leakage magnetic flux is reduced by extending the horizontal part of the skid rail and providing the inclined chute part on the outside of the heating coil. This has the effect that post-process pressing etc. can be done automatically, reducing waste material and making it more economical.

[Brief explanation of drawings]

Fig. 1 is a side view showing a conventional warm forging induction heating device, Fig. 2 is a technical drawing showing one embodiment of the present invention, and Fig. 4 is a warm forging machine showing still another embodiment of the present invention. FIG. 3 is a side view of the heating device. In the figure, (1) is the material to be heated, and (4) is the heating coil. (B) is the end part, 12 is the inclined chute part, (7) is the thermal insulation hood, (8) I/'i 3. -It is a tring. In addition, in FIG. 9, the same reference numerals indicate the same or corresponding parts. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a continuous feed type induction heating device that heats a material to be heated by a heating coil within the temperature range of a magnetic region, a tilted chute portion for carrying out the material to be heated from the heating coil is provided. An induction heating device characterized in that it is provided outside the heating coil. (2) The induction heating device according to claim 1, wherein the heating coil is provided with a heat insulating hood at the heating end end thereof. (3) Does the heating coil have a short ring at its heating end? An induction heating device according to claim 1, characterized in that: