JP6838374B2 - Hot forging equipment - Google Patents

Description

The present invention relates to a hot forging device that freely forges a material to be forged stored in a heat retaining chamber in a high temperature atmosphere.

In free forging, the material to be forged (hereinafter, may be referred to as a work) is preheated to a temperature at which forging can be performed (for example, any temperature between 800 and 1200 ° C.), and then the work is formed by a pair of upper and lower metal mats. Forging is performed by pressing (pressing) the work a plurality of times, but if the work loses heat during machining and the temperature of the work deviates from the workable range, machining cracks occur. In particular, a high-strength Ni-based alloy or the like having a high tensile strength at a high temperature is a difficult-to-process material having a large deformation resistance during hot processing and is difficult to process, and the processable temperature range is limited.
Therefore, every time the temperature of the work decreases, the work must be inserted into the heating furnace and reheated to a temperature at which forging can be performed, resulting in a significant decrease in work efficiency.

As a method for preventing heat loss during free forging, in Patent Document 1 below, a heated heat insulating member is interposed between the work and the lower metal bed to suppress heat loss due to contact of the work with the lower metal bed. , The point of preventing heat loss cracking is disclosed. However, the one described in Patent Document 1 has a limited effect of preventing heat loss, and even if it is applied to free forging of difficult-to-process materials, a sufficient effect cannot be obtained.

On the other hand, in Patent Document 2 below, a press forming chamber in which a set of dies and a heating device are housed inside a constant temperature forging chamber and forging is performed while maintaining the die temperature at or near the work temperature. The device is disclosed. However, the one described in Cited Document 2 does not have a mechanism for handling the work.

Japanese Unexamined Patent Publication No. 2000-51987 Jikkenhei No. 2-42733

Against the background of the above circumstances, the present invention prevents heat loss cracking by suppressing heat loss of the material to be forged in free forging performed at high temperature, and shortens the processing time required for forging work. It was made for the purpose of providing a hot forging device capable of achieving the above.

Therefore, claim 1 is a heat-retaining chamber having a storage space for storing the material to be forged inside, and the material to be forged that is arranged so as to penetrate the peripheral wall of the chamber inside and outside and is located in the chamber. A pair of metal fittings for pressing, a heating means for heating the atmosphere of the storage space, a temperature control means for controlling the atmosphere temperature of the storage space, and an end portion of the material to be forged or a connection connected to the end portion. The chamber includes a manipulator that holds a member and moves the material to be forged, which is located in the chamber, back and forth or rotates, and the chamber is formed with an opening through which an upper metal bed is inserted in the upper wall portion of the bottom wall portion. An opening for inserting the lower metal bed is formed at a position facing the opening for inserting the upper metal bed, and the material to be forged is inserted into the chamber in the rear wall portion facing the manipulator, and the forged material is inserted into the chamber. It is characterized in that an opening for taking out the material from the inside of the chamber is formed.

The second aspect of the present invention includes, in the first aspect, a heat-shielding member that covers an opening communicating with the storage space, and the heat-shielding member is a flexible strip whose upper end is supported in a cantilevered state. A plurality of plate-shaped heat insulating sheets are arranged side by side in the left-right direction so as to cover the opening.

According to a third aspect of the present invention, the heat shielding member is arranged on the side opposite to the opening in the thickness direction of the heat insulating sheet, and exerts a force on the heat insulating sheet in the opening direction. It is characterized by having a seat retainer.

The fourth aspect of the present invention is the first imaging means capable of imaging the tip of the material to be forged from a direction substantially parallel to the forging direction, and the material to be forged substantially orthogonal to the forging direction. It is characterized by comprising a second imaging means capable of imaging from the direction in which the image is taken.

In claim 5, in claim 1, a heat insulating plate having a thermal conductivity smaller than that of the gold floor is disposed between the metal floor and the mounting member to which the gold floor is attached, and further, the heat insulating plate and the heat insulating plate. A cooling plate provided with a water cooling hole for circulating cooling water is disposed between the mounting member.

As described above, the hot forging apparatus of the present invention has a heat retaining chamber internally provided with a storage space for storing the material to be forged, a pair of metal fittings for pressing the material to be forged located in the chamber, and a storage space. A heating means for heating the atmosphere of the space, a temperature control means for controlling the atmosphere temperature of the storage space, a manipulator for holding the end portion of the material to be forged and moving the material to be forged moving forward / backward or rotationally moving in the chamber. It is characterized by having.
According to the present invention, in a state where the material to be forged is stored in a storage space heated to a predetermined atmospheric temperature, free forging such as pressing (compression) using a metal bed and moving the position of the material to be forged Can perform a series of operations. At this time, the atmosphere and the metal floor in contact with the material to be forged are maintained in a high temperature state by the heating means and the temperature control means, so that the heat loss of the material to be forged can be suppressed.
Therefore, according to the present invention, cracking due to heat loss of the material to be forged can be suppressed, and reheating due to a decrease in temperature of the material to be forged can be eliminated, so that the processing time required for forging can be shortened. Can be planned. In addition, since continuous forging for a long time is possible, it is possible to increase the size of the material to be forged as compared with the conventional case.
The manipulator can not only directly hold the end of the material to be forged, but also indirectly hold the end of the material to be forged via a connecting member connected to the end of the material to be forged. is there.

In the present invention, the opening communicating with the storage space of the chamber can be covered with a heat shielding member. In this case, a flexible strip-shaped heat insulating sheet having the upper end supported in a cantilever state is used as the heat shielding member, and a plurality of such heat insulating sheets are arranged side by side in the left-right direction to cover the opening. Can be configured in.

In this way, even if there is a material to be forged that penetrates the opening inside and outside, the flexible heat insulating sheet that comes into contact with the material to be forged deforms or moves according to the size of the material to be forged. Since the gap around the material to be forged is adjusted, heat leakage generated through the gap can be suppressed with a simple structure.

Here, if a sheet retainer that exerts a force in the opening direction on the heat insulating sheet is provided on the side opposite to the opening in the thickness direction of the heat insulating sheet, it is possible to prevent a gap from being generated between the opening and the heat insulating sheet. can do. As the seat retainer, for example, a metal chain or the like whose upper end is supported in a cantilever state can be used.

In the present invention, a first imaging means capable of imaging the tip of the material to be forged from a direction substantially parallel to the forging direction and a second imaging means capable of imaging the material to be forged from a direction substantially orthogonal to the forging direction. Means and can be provided. By doing so, the processed shape of the material to be forged that is continuously forged in the chamber can be confirmed based on the image obtained through the imaging means.

In the present invention, by arranging a heat insulating plate having a thermal conductivity lower than that of the gold slab between the metal slab and the mounting member to which the gold sill is attached, it is possible to prevent the temperature of the gold sill from dropping.
Further, by disposing a cooling plate provided with a water cooling hole for circulating cooling water inside between the heat insulating plate and the mounting member, it is possible to prevent the temperature rise on the mounting member side of the forging press or the like.

According to the present invention as described above, by suppressing the heat loss of the material to be forged in the free forging performed at a high temperature, the heat loss cracking is prevented and the processing time required for the forging process is shortened. It is possible to provide a hot forging device capable of providing a hot forging device.

It is a figure which showed the whole structure of the hot forging apparatus of one Embodiment of this invention. It is a cross-sectional view of the hot forging apparatus of the same embodiment. It is a figure which showed the heat shielding member attached to the rear wall part of the chamber of FIG. FIG. 3 is an enlarged vertical cross-sectional view of the heat shielding member of FIG. FIG. 1 is an enlarged view of the upper metal floor of FIG. 1 and its peripheral portion. It is a figure which showed the hot forging apparatus in the state which lowered the upper metal bed. It is explanatory drawing of the free forging process using the hot forging apparatus of the same embodiment. It is explanatory drawing of the free forging process following FIG.

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing the overall configuration of the hot forging apparatus 10 of the present embodiment. In FIG. 1, W is a work as a material to be forged, 12 is a heat-retaining chamber for accommodating the work W inside, and 16 is a manipulator for holding and moving the work W.

The chamber 12 has a peripheral wall 20 composed of a front wall portion 21, a rear wall portion 22, an upper wall portion 23, a bottom wall portion 24, a right wall portion 25, and a left wall portion 26, and the entire chamber has a substantially rectangular parallelepiped shape. doing. The peripheral wall 20 includes an iron hearth 28 and a heat insulating material 30 made of a refractory material such as a refractory brick or ceramic fiber lined inside the furnace shell 28. Inside the peripheral wall 20, a storage space 32 for storing the work W is formed long in the forging direction of the work W (in the left-right direction in the drawing).

On the inner wall surface of the right wall portion 25 and the left wall portion 26, an electric heater 34 as a heating means for heating the atmosphere of the storage space 32 is extended in the forging direction of the work W. The electric heater 34 is connected to a power supply unit (not shown), and power is supplied from the power supply unit.
Reference numeral 36 denotes a thermocouple as a temperature detecting means for measuring the ambient temperature of the storage space 32, which is connected to the temperature control unit 38. The temperature control unit 38 controls the power supply from the power supply unit to the electric heater 34 so that the ambient temperature detected by the thermocouple 36 matches a predetermined set temperature.

An opening 40 through which the upper metal bed 44 is inserted is formed in the upper wall portion 23 of the chamber 12, and a tubular portion 42 projecting upward is provided around the opening 40. On the other hand, the bottom wall portion 24 is formed with an opening 41 through which the lower metal floor 46 is inserted at a position facing the opening 40 through which the upper metal floor 44 is inserted.

A pair of upper and lower metal mats 44 and 46 are attached to a forging press 48 as a driving means, respectively.
The lower metal floor 46 has a tip portion 46a having a substantially square shape that is horizontally long in a plan view and is in contact with the work W, and presses the work W in cooperation with the upper metal floor 44. The lower metal fitting 46 is attached to the lower metal fitting mounting member 50 on the fixed side whose base end portion 46b is integrated with the frame of the forging press 48, penetrates the opening 41 upward from the lower side of the chamber 12, and passes through the tip portion 46a. It is arranged in the storage space 32. The height of the lower metal bed 46 is defined so that the tip portion 46a is located directly below the work W.

A heat insulating plate 52 is arranged between the lower metal floor 46 and the lower metal floor mounting member 50. The heat insulating plate 52 is made of a ceramic such as alumina, which has a lower thermal conductivity than the lower metal bed 46, and prevents the temperature of the lower metal bed 46 from dropping. Further, a cooling plate 54 is arranged between the heat insulating plate 52 and the lower metal fitting mounting member 50. The cooling plate 54 is formed with a water cooling hole 55 for circulating cooling water inside, and by circulating the cooling water through the water cooling hole 55, the temperature rise on the underlaying attachment member 50 side, that is, the forging press 48 side can be increased. I'm preventing it.

On the other hand, the upper metal fitting 44 has a tip portion 44a having a substantially square shape that is horizontally long in a plan view and is in contact with the work W, and presses the work W in cooperation with the lower metal fitting 46. The upper metal floor 44 is arranged above the chamber 12 so that the tip portion 44a faces the storage space 32, and the base end portion 44b of the upper metal floor 44 moves integrally with the ram (not shown) of the forging press 48. It is fixed to the upper metal floor mounting member 57. In the upper forging 44 as well, as in the case of the lower forging 46 described above, a heat insulating plate 59 having a thermal conductivity smaller than that of the upper forging 44 is arranged between the upper forging 44 and the upper forging mounting member 57, and further. A cooling plate 61 having a water cooling hole 62 for circulating cooling water is disposed between the heat insulating plate 59 and the upper metal floor mounting member 57 to prevent the temperature of the upper metal floor 44 from dropping and the forging press 48. The upper metal floor 44 configured as described above is designed to prevent the temperature of the side members from rising. The upper metal floor 44 moves up and down together with the ram of the forging press 48 moving up and down, and when it descends, it moves up and down together with the lower metal floor 46. Work W is pressed in cooperation.

An opening 64 is formed in the front wall portion 21 of the chamber 12, heat-resistant glass 65 is fitted therein, and a first camera 66 as an imaging means is arranged outside the opening 64. The first camera 66 captures an image of the tip of the work W from a direction substantially parallel to the forging direction, and the shape of the front view of the tip of the work W is confirmed by a monitor (not shown) connected to the first camera 66. can do.

Further, as shown in FIG. 2, an opening 67 is formed in the left wall portion 26 of the chamber 12, heat-resistant glass 68 is fitted therein, and a second camera 69 as an imaging means is arranged outside the opening 67. Has been done. The second camera 69 captures the work W from a direction substantially orthogonal to the forging direction, and the side shape of the work W that has been forged by a monitor (not shown) connected to the second camera 69. Can be confirmed.

The rear wall portion 22 facing the manipulator 16 is formed with an opening 70 for inserting the work W into the chamber 12 and taking out the work W from the chamber 12.

As shown in FIG. 1, the manipulator 16 has a head 71 at the tip of the arm 75, and includes a pair of holders 72 that rotate around the shaft pin 71a of the head 71. The holder 72 includes an inwardly facing holding surface 73, and the work W is held by the holding surface 73 by rotating the pair of holders 72 in the closing directions close to each other. The head 71 is movable in the vertical, horizontal, and front-rear directions, that is, in the three-dimensional direction, and is configured to be rotatable at a predetermined angle around the axis center of the arm 75, which is the base end side of the head 71.
Therefore, the manipulator 16 can store the tip end side of the held work W in the storage space 32 through the opening 70 of the chamber 12. Further, the work W can be rotated around the center of the axis in the stored state.

As shown in FIGS. 1 and 3, a heat shielding member 77 is provided on the rear wall portion 22 of the chamber 12 so as to cover the opening 70.
The heat shielding member 77 is arranged on the outer surface 78b side of the heat insulating sheet 78 and the heat insulating sheet 78 which is in contact with the peripheral edge of the opening 70 on the inner surface 78a to directly shield the opening 70, and exerts a force in the opening 70 direction on the heat insulating sheet 78. It has a metal chain 79 as a seat retainer to act on.

As shown in FIG. 4, the heat insulating sheet 78 is composed of a fiber blanket 80 and a bag-shaped fiber cloth 81 that covers the periphery thereof, and has a strip plate shape as a whole.
The fiber blanket 80 is made of a felt-like heat insulating member made of, for example, alumina silicate fiber, and the fiber cloth 81 is made of a refractory fiber such as alumina or alumina silicate.

Each of the heat insulating sheets 78 is formed with a length reaching the upper opening edge and the lower opening edge of the opening 70, and the upper end portion thereof is attached and fixed to the rear wall portion 22 of the chamber 12 via the bracket 82. ing. In other words, the heat insulating sheet 78 is supported with its upper end in a cantilevered state. By arranging the plurality of heat insulating sheets 78 side by side in the left-right direction (width direction of the chamber 12), the entire opening 70 is shielded by the heat insulating sheet 78.

The metal chain 79 is made of stainless steel (SUS304), and like the heat insulating sheet 78, its length is formed to reach the upper opening edge and the lower opening edge of the opening 70, and the upper end thereof is the bracket 82. It is fixed to the rear wall portion 22 of the chamber 12 via a cantilever and is supported in a cantilever state. As shown in FIG. 4, the metal chain 79 is arranged so as to be in contact with the outer surface 78b of the heat insulating sheet 78, and acts to press the heat insulating sheet 78 toward the opening 70, so that the heat insulating sheet 78 and the peripheral edge of the opening 70 Prevents the formation of gaps between the gaps or reduces the gaps to suppress heat leakage from the opening 70.
Although only a part of the metal chain 79 is shown in FIG. 3, a plurality of metal chains 79 are arranged side by side in the left-right direction so as to cover the entire opening 70, similarly to the heat insulating sheet 78.

According to this example, since the heat insulating sheet 78 has flexibility, as shown in FIG. 3B, even if there is a work W penetrating the opening 70, it depends on the size of the work W. As a result, the heat insulating sheet 78 in contact with the work W is deformed or moved (expanded in the left-right direction) to adjust the gap around the work W. On the other hand, in the region away from the work W, the heat insulating sheet 78 maintains the shielded state, so that heat leakage from the opening 70 can be suppressed.

In this example, the heat shielding member 89 is also arranged in the space around the upper metal bed 44 above the opening 40 formed in the upper wall portion 23 so as to suppress heat dissipation from the opening 40.
As shown in FIG. 5, in the vicinity of the base end portion 44b of the upper metal bed 44, a flange portion 88 projecting outward in the direction perpendicular to the axis from the side surface of the upper metal bed 44 is provided in an annular shape. The size of the flange portion 88 is defined so that the position of the outer peripheral end surface 88a is substantially the same as the position of the outer surface 42a of the tubular portion 42 on the upper wall portion 23 side in a plan view. A heat shielding member 89 is provided so as to cover the opening 86 formed between the flange portion 88 and the tubular portion 42.

The heat shielding member 89 has a heat insulating sheet 92 that is in contact with the peripheral edge of the opening 86 at the inner surface 92a to directly shield the opening 86, and a metal chain 94 arranged on the outer surface 92b side of the heat insulating sheet 92. ..

Like the heat insulating sheet 78 described above, the heat insulating sheet 92 is composed of a fiber blanket and a bag-shaped fiber cloth covering the periphery thereof, and has a strip-shaped overall shape.

Each heat insulating sheet 92 is formed with a length reaching the upper opening edge and the lower opening edge of the opening 86, and the upper end portion thereof is attached and fixed to the outer peripheral end surface 88a of the flange portion 88 via the bracket 93. , Supported in a cantilevered state. By arranging the plurality of heat insulating sheets 92 side by side in the left-right direction (circumferential direction) of the collar portion 88, the entire opening 86 is shielded by the heat insulating sheet 92.

On the other hand, like the heat insulating sheet 92, the metal chain 94 has its upper end fixed to the outer peripheral end surface 88a of the flange portion 88 via the bracket 93. A plurality of metal chains 94 are arranged side by side in the left-right direction (circumferential direction) of the collar portion 88.
The metal chain 94 is arranged so as to be in contact with the outer surface 92b of the heat insulating sheet 92. Therefore, since the metal chain 94 acts to press the heat insulating sheet 92 toward the opening 86 side, it is possible to suppress the formation of a gap between the heat insulating sheet 92 and the peripheral edge portion of the opening 86, and the heat inside the chamber 12 is transferred to the opening 40 and the opening 86. It is possible to suppress leakage to the outside through the opening 86.

Since the heat insulating sheet 92 has flexibility, as shown in FIG. 6, when the upper metal bed 44 is lowered, the lower end side of the heat insulating sheet 92 is bent and deformed along the upper wall portion 23. At this time, since the lower end of the heat insulating sheet 92 is pressed downward by the metal chain 94, it is possible to suppress the formation of a gap between the heat insulating sheet 92 and the upper wall portion 23, and the heat inside the chamber 12 is transferred to the openings 40 and 86. It is possible to suppress leakage to the outside through.

Next, a free forging process using the hot forging device 10 of the present embodiment will be described.
In this example, the temperature is controlled in advance so that the ambient temperature of the storage space 32 in the chamber 12 becomes a desired temperature (for example, any temperature of 800 to 1200 ° C.). Then, after the round bar-shaped work W is heated to a predetermined temperature (for example, any temperature of 800 to 1200 ° C.) in a heating furnace (not shown), the work W is shown in FIG. 7 (I). One end (rear end) of the work W is held by the manipulator 16, the work W is inserted into the chamber 12 through the opening 70 of the chamber 12, and the machining start point P of the work W is directly above the tip 46a of the lower metal bed 46. Hold the work W at the position.

Then, as shown in FIG. 7 (II), the upper metal bed 44 is lowered, and the work W is pressed (compressed) in cooperation with the lower metal bed 46. After the pressing is completed, the upper metal bed 44 is raised to separate the upper metal bed 44 and the lower metal bed 46, and then the work W is fed axially rearward (to the right in the figure) by the manipulator 16 (see FIG. 7 (III)). , As shown in FIG. 7 (IV), the same operation as described above is performed, and the portion following the tip of the work W is pressed. After that, the same operation is repeated until the state shown in FIG. 8 (V) is finally reached, where the first step is completed.

After completing the first step as described above, the work W is then rotated by 90 ° by the manipulator 16 as shown in FIG. 6 (VI). After that, the work W is fed forward in the axial direction by the manipulator 16, and the pressing operation in the second step is disclosed from the machining start portion P as shown in FIG. 6 (VII). Then, the pressing operation on the work W is repeated toward the tip end side of the work W in the same manner as in the first step, and the final state shown in FIG. 6 (VIII) is reached, and the second step ends here. The cross-sectional shape of the work W after the completion of the first step is a substantially horizontally long oval as shown in FIG. (V), and after the completion of the second step, the work is formed as shown in FIG. The cross-sectional shape of W is a square shape.

Even after that, the pressing from two directions using the pair of gold mats 44 and 46 and the feeding operation of the work W in the same axial direction are performed, and the width across flats of the cross-sectional shape of the work W becomes a predetermined dimension. Repeat alternately until. During this period, in this example, the forging process can be continuously continued without reheating the work W by the heating furnace.
Whether or not the width across flats of the cross-sectional shape of the work W has become a predetermined dimension can be confirmed by the images from the first camera 66 and the second camera 69. After processing to a predetermined size, the work W is taken out from the chamber 12 by the manipulator 16 and the forging work is completed.
In the above description, the work W is processed so that the cross-sectional shape is a quadrangle, but it is also possible to process it into a polygon other than a quadrangle by changing the rotation angle of the manipulator 16. ..

As described above, according to the present embodiment, the work W is stored in the storage space 32 heated to a predetermined atmospheric temperature, and the work W is pressed by using the forgings 44 and 46 and the position of the work W is moved. A series of free forging operations can be performed. At this time, the atmosphere in contact with the work W and the metal mats 44 and 46 are maintained in a high temperature state by the electric heater 34 and the temperature control unit 38, so that the heat loss of the work W can be suppressed.
Therefore, according to the present embodiment, cracking due to heat loss of the work W can be suppressed, and reheating due to a decrease in the temperature of the work W can be eliminated, so that the processing time required for forging can be shortened. Can be planned. Further, since continuous forging for a long time is possible, it is possible to increase the size of the material to be forged (work W) as compared with the conventional case.

In the present embodiment, as the heat shielding member 77 covering the opening 70 communicating with the storage space 32 of the chamber 12, a flexible strip-shaped heat insulating sheet 78 having an upper end supported in a cantilever state is used. A plurality of such heat insulating sheets 78 are arranged side by side in the left-right direction so as to cover the opening 70. Therefore, in the present embodiment, even if there is a work W penetrating the opening 70, the heat insulating sheet 78 in contact with the work W is deformed or moved according to the size of the work W, and the gap around the work W is adjusted. Therefore, heat leakage from the opening 70 can be suppressed.

Further, in the present embodiment, a metal chain 79 as a sheet retainer for applying a force in the opening 70 direction to the heat insulating sheet 78 is provided on the side of the heat insulating sheet 78 opposite to the opening 70 in the plate thickness direction. It is possible to suppress the formation of a gap between the peripheral edge portion and the heat insulating sheet 78.

In the present embodiment, the first camera 66 capable of imaging the tip of the work W from a direction substantially parallel to the forging direction, and the second camera 69 capable of imaging the work W from a direction substantially orthogonal to the forging direction. Is provided, and the processed shape of the work W that is continuously forged in the chamber 12 can be confirmed based on the images obtained through the first camera 66 and the first camera 66.

Further, in the present embodiment, a heat insulating plate 59 having a thermal conductivity smaller than that of the upper metal floor 44 is arranged between the upper metal floor 44 and the upper metal floor mounting member 57 to which the upper metal floor 44 is attached. It is possible to prevent the temperature from dropping. Further, a cooling plate 61 having a water cooling hole 62 for circulating cooling water is provided between the heat insulating plate 59 and the upper metal floor mounting member 57 to prevent the temperature of the forging press 48 from rising. Can be done. In the present embodiment, a heat insulating plate and a cooling plate are similarly arranged between the lower metal floor 46 and the lower metal floor mounting member 50.

The embodiments of the present invention have been described in detail above, but this is merely an example. For example, the manipulator 16 can not only directly hold the end of the work W, but also indirectly hold the end of the work W via a connecting member connected to the end of the work W. Further, as the heating means for heating the atmosphere of the storage space, it is possible to adopt a means other than the electric heater such as gas heating, and the present invention can be carried out in a manner in which various modifications are made without departing from the spirit of the present invention. Is.

10 Hot forging equipment 12 Chamber 16 Manipulator 20 Peripheral wall 32 Storage space 34 Electric heater (heating means)
38 Temperature control unit (temperature control means)
44 Upper metal floor 46 Lower metal floor 52, 59 Insulation plate 54, 61 Cooling plate 55, 62 Water cooling hole 66 First camera (first imaging means)
69 Second camera (second imaging means)
70,86 Opening 77,89 Heat blocking member 78,92 Insulation sheet 79,94 Metal chain (sheet holder)
W work (material to be forged)

Claims (5)

A heat-retaining chamber with an internal storage space for the material to be forged,
A pair of metal mats that are arranged so as to penetrate the peripheral wall of the chamber inside and outside and press the material to be forged located in the chamber.
A heating means that heats the atmosphere of the storage space,
A temperature control means for controlling the ambient temperature of the storage space,
A manipulator that holds an end portion of the material to be forged or a connecting member connected to the end portion and moves the material to be forged forward / backward or rotationally moves, which is located in the chamber, is provided .
The chamber
An opening is formed in the upper wall to allow the upper metal floor to be inserted.
An opening through which the lower metal fitting is inserted is formed at a position of the bottom wall portion facing the opening through which the upper metal fitting is inserted.
A hot forging apparatus characterized in that an opening for inserting the material to be forged into the chamber and taking out the material to be forged from the chamber is formed in a rear wall portion facing the manipulator. .. A heat-shielding member that covers an opening communicating with the storage space is provided.
The heat-shielding member is configured to cover the opening by arranging a plurality of flexible strip-shaped heat insulating sheets supported in a cantilevered state at the upper ends in the left-right direction. The hot forging apparatus according to claim 1. A claim characterized in that the heat shielding member is arranged on the side opposite to the opening in the plate thickness direction of the heat insulating sheet, and is provided with a sheet retainer that exerts a force in the opening direction on the heat insulating sheet. Item 2. The hot forging apparatus according to item 2. A first imaging means capable of imaging the tip of the material to be forged from a direction substantially parallel to the forging direction, and a second imaging means capable of imaging the material to be forged from a direction substantially orthogonal to the forging direction. The hot forging apparatus according to claim 1, further comprising. A heat insulating plate having a thermal conductivity smaller than that of the metal floor is arranged between the metal floor and the mounting member to which the gold floor is attached.
The hot forging apparatus according to claim 1, further comprising a cooling plate provided with a water cooling hole for circulating cooling water inside between the heat insulating plate and the mounting member.

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