JPS6257412B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an induction heating device that supplies lubricant to a heated body heated by a heating coil.

[Prior art]

Generally, the metal to be heated (hereinafter referred to as the object to be heated) is
In warm forging, heated to 300℃ to 900℃,
Since this temperature region corresponds to the region where the frictional resistance is greatest, the product may elongate during forging, or
There is also the problem that precision forging is not possible due to poor fitting, etc. To solve this problem, it is common to apply a lubricant such as lubricant to the surface of the heated object before forging. is being carried out. In this case, if the above-mentioned lubricant is heated immediately after application, the vaporized components of the lubricant may adhere to the furnace wall of the heating coil that constitutes the induction heating device, damaging the coil. 100℃
It is normal to heat the product to ~300℃, apply a lubricant to the heated object, and after the vaporized components of the lubricant evaporate due to the heat of the heated object, warm forging is performed by heating with a heating coil. be.

An example of the layout of the above-described preheating, furnace, lubricant application means, heating coil, etc. in a conventional apparatus will be explained with reference to FIGS. 1 and 2. In the figure, 1 is the object to be heated, 2 is the first material supply device that continuously discharges the objects 1 to be heated one by one, and 3 is a straight line that carries the objects 1 to be heated discharged from the material supply device 2. A slat conveyor, 4 a pinch roller for feeding the heated object 1, 5 a heating coil, 6 a slat conveyor 3, a pinch roller 4, a heating coil 5,
It is a matching unit that arranges 7 is a forging press, 8 is a first conveyor, and as shown in FIG. 2, a complex structure having a descending section 81, a flat section 82, and an ascending section 83 is used. 9 is a lubricant such as lubricating oil, 10 is a bath filled with the lubricant 9, and 11 is a preheating furnace, which normally heats the object 1 using heavy oil. 12 is a linear second conveyor configured to pass through the preheating furnace 11, and 13 is a second material supply device.

Next, the operation will be explained. Second material supply device 1
The objects 1 to be heated, which are continuously supplied one by one from 3 to 3, are transferred to the preheating furnace 11 by a linear second conveyor 12.
It passes through and is heated to 100℃~300℃. Thereafter, the object to be heated 1 is first conveyed into the bathtub 10 by the descending part 81 of the special first conveyor 8, which is different from other linear conveyors, and then is carried into the bathtub 10 by the flat part 82. The object 1 to be heated is passed through the bathtub 10 by the rising part 83 and the lubricant 9 is applied thereto.
After being carried out, it is supplied to the first material supply device 2.

The first material supply device 2 is the second material supply device 1
As in 3, the objects to be heated 1 are successively conveyed one by one onto the linear slat conveyor 3 and are forced into the heating coil 5 by the pinch rollers 4, but in the process up to this point, the vaporized components of the lubricant 9 are The heating element 1 is dried by the heat it possesses, and the lubricating particles are attached to the heated element 1 at a predetermined temperature (300°C to 900°C).
After being heated, it is sent to a forging press 7, where the lubricating particles play the role of lubrication and precision forging is performed.

In the conventional induction heating device as described above, there is a step of preheating the heated object 1 and a process of applying a lubricant 9 to the heated object 1.
In the process of coating the object to be heated and the step of heating the object to be heated 1, the object to be heated 1 is connected to an independent slat conveyor 3, a first conveyor 8, a second conveyor 1
2 to be transported in different directions, the device has many components, the structure becomes complicated, and the line space becomes large. The first conveyor 8 for carrying out the heated object 1 from the bathtub 10 must have a complex structure including a descending section 81, a flat section 82, and an ascending section 83 so that the lubricant 9 can be applied. There was a drawback.

[Summary of the invention]

In view of the above-mentioned conventional circumstances, the present invention provides an induction heating apparatus equipped with a coating means that enables lubricant to be applied to the end face of a heated object without using a conveyor with a complicated structure in the conventional apparatus. The purpose of this device is to provide a support device that is arranged approximately linearly between the preheating coil and the heating coil, with a part of the support device being inclined, so that the object to be heated can be moved along the inclined portion. The lubricant is supplied from the lubricant supply port to the gap created between the adjacent heated bodies due to the inclination.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 3, 4, and 5. In the figure, numerals 1 to 7 and 9 are the same as the conventional one, so the explanation will be omitted.

14 is a preheating coil that preheats the heated object 1 to 100°C to 300°C; 15 is a preheating coil 14 and a preheating coil 5;
a support device that connects the two in a substantially straight line and has a chevron-shaped inclined part in a part and supports a plurality of heated objects 1; 16 is a recovery bath that collects the lubricant 9 left over from coating the heated objects 1; 17 is a collection pipe, 18 is a collection pipe 1
A lubricant tank 7 stores the lubricant 9 sent from 7, a stirring device 19 prevents the lubricant particles from settling, and a lubricant delivery pipe 20 stores the lubricant 9 stored in the lubricant tank 18. A pump 22 that supplies pressure to the lubricant 21 is a lubricant supply port. Further, the centers of the preheating coil 14 and the heating coil 5 are located substantially in a straight line.

In operation, the objects to be heated 1 are continuously supplied one by one from the first material supply device 2 and are conveyed on a linear slat conveyor 3 and forced into the preheating coil 14 by the pinch rollers 4.

The object to be heated 1 whose temperature has been raised to 100° C. to 300° C. by the preheating coil 14 is discharged from the preheating coil 14 and sent to the support device 15 . The support device 15 is the preheating coil 1
It consists of two parallel rails arranged in a substantially straight line between the heating coil 4 and the heating coil 5, bent into a chevron shape in the middle, and the lubricant supply port 22 is arranged almost directly above it. The heated object 1 that has gone over the top of the mountain-shaped bending part and the heated object that has not gone over the top are adjacent to each other, but their end faces are exposed upward, and the lubricant 9 from the lubricant supply port 22 is exposed. is applied not only to the sides but also to the ends. The lubricant 9 is applied and the heated body 1 is transferred towards the heating coil 5, but during this time the vaporized components in the lubricant 9 are heated to 100°C.
Since it is heated to ~300° C., it evaporates due to this heat, and by the time it reaches the heating coil 5, only lubricating particles are attached to the surface of the heated object 1. Heated object 1
is heated to 300°C to 900°C with a heating coil 5 and then warm-forged in a forging press 7. In this case, precision forging becomes possible because the lubricating particles act as a lubricant.

On the other hand, the unapplied lubricant 9 is collected in a collection bath 16 and passed through a collection pipe 17 to a lubricant tank 18.
Enter. In the lubricant tank 18, a stirring device 19 continues to stir the lubricant particles so that the lubricant particles do not settle, so that a uniform lubricant 9 can be stored.

The lubricant 9 pressurized and delivered by the pump 20 is supplied to the lubricant supply port 22 via the supply pipe 21 and is ejected to the heated body 1, repeating the cycle.

In this invention, as described above, the lubricant supply port 22 for applying the lubricant 9 is disposed between the preheating coil 14 and the heating coil 5, which are arranged substantially in a straight line, so that the number of components of the device is reduced. Along with this, the line space becomes smaller. As a result, the distance between the preheating coil 14 and the heating coil 5 becomes shorter, so the object to be heated 1
This has the advantage of reducing the temperature drop, making it possible to obtain an energy-saving device.

In the above explanation, the support device 15 is the lubricant supply port 2.
2, but as shown in Fig. 5, even in the case where there is one inclined part, the object to be heated 1 is inclined along the inclined part and the heated object 1 has not yet reached the inclined part. Since the end faces of the adjacent heated bodies 1 that are free from heat are exposed, it becomes possible to apply lubricant to the end faces.

[Effects of the Invention] As described above, according to the present invention, since the support device for supporting the heated object is provided with an inclined portion, the heated object can be easily moved without using a conveyor with a complicated structure as in the past. This has the effect that lubricant can also be applied to the end face.

[Brief explanation of the drawing]

1 and 2 are diagrams showing a conventional induction heating device, in which FIG. 1 is a plan view, FIG. 2 is a sectional view taken along the line of FIG. 1 in the direction of the arrow, and FIGS.
FIG. 5 is a side view showing one embodiment of the present invention;
This drawing is a partially enlarged sectional side view of FIG. 3, and FIG. 5 is a partial side view showing the main parts of another embodiment of the present invention. In the figure, 1 is an object to be heated, 5 is a heating coil,
14 is a preheating coil, 15 is a support device, and 22 is a lubricant supply port. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A heating coil, a preheating coil provided before the heating coil, and a preheating coil arranged approximately linearly between the heating coil and the preheating coil, with a part inclined, and heated by both the coils. a support device that supports a plurality of adjacent heated objects to be transferred from the heating coil to the heating coil; and a lubricant on an end face of the heated objects that are inclined at least along the inclined portion of the support device. An induction heating device equipped with a lubricant supply port that supplies lubricant.