WO2014097551A1

WO2014097551A1 - Spin forming device

Info

Publication number: WO2014097551A1
Application number: PCT/JP2013/006971
Authority: WO
Inventors: 嘉秀今村; 雄斗坂根; 勇人岩崎; 敏郎辻; 恒平三上; 秀之大岸
Original assignee: 川崎重工業株式会社
Priority date: 2012-12-18
Filing date: 2013-11-27
Publication date: 2014-06-26
Also published as: JP6077852B2; EP2937157B1; CN104837575A; CN104837575B; US20150328673A1; EP2937157A1; JP2014117735A; EP2937157A4

Abstract

The purpose of the present invention is to make it possible to reduce the heat transmitted in a spin forming device from a disc material through a clamping jig to the rotation shaft. The spin forming device (1A) is provided with: a clamping jig (3) for supporting the center of a disc material (9) that is to be formed; a rotation shaft (2) on which the clamping jig (3) is mounted; a heater (6) for heating the region (91) to be deformed in the disc material (9) by induction heating; and a machining tool (7) for deforming the disc material (9) by being pressed on the region (91) to be deformed. The clamping jig (3) is configured so as to limit heat transmission from the disc material (9) to the rotation shaft (2).

Description

Spinning molding equipment

The present invention relates to a spinning forming apparatus that forms a desired shape while rotating a plate material.

2. Description of the Related Art Conventionally, there is known a spinning molding apparatus that deforms a plate material by pressing the processing tool against the plate material while rotating the plate material. Such a spinning molding apparatus usually has a mandrel (molding die) attached to a rotating shaft, and molding is performed by pressing a plate material against the mandrel by a processing tool.

Recently, a spinning molding apparatus that performs spinning molding while locally heating a plate material has been proposed. For example, Patent Document 1 discloses a spinning molding apparatus that heats a portion pressed against a mandrel by a spatula (processing tool) in a plate material by high-frequency induction heating as a spinning molding apparatus for a titanium alloy.

JP 2011-218427 A

By the way, the inventors of the present invention have found that if a plate material is locally heated by induction heating, the plate material can be deformed in accordance with the final shape in the atmosphere without using a mandrel. From this point of view, the applicant of the present application, in the application prior to the present application (Japanese Patent Application No. 2012-178269), uses a spinning molding apparatus that uses a receiving jig that supports the center of the plate material instead of the mandrel. Proposed. In this spinning forming apparatus, the deformation target portion of the plate material is heated by the heater and pressed by the processing tool in the atmosphere away from the receiving jig. That is, the plate material is not pressed against the receiving jig by the processing tool. In other words, unlike the mandrel, the receiving jig does not have a molding surface.

Since the receiving jig is generally smaller and has a smaller heat capacity than the mandrel, a part of the heat applied to the plate material by induction heating is transmitted to the rotating shaft through the receiving jig in a short time. . When a large amount of heat is transmitted to the rotating shaft, the rotating shaft may be altered or the durability of the rotating shaft may be deteriorated.

Therefore, an object of the present invention is to reduce heat transmitted from a plate material to a rotating shaft through a receiving jig in a spinning molding apparatus.

In order to solve the above problems, the present invention provides, from one side, a receiving jig that supports a central portion of a plate material to be molded, a rotating shaft to which the receiving jig is attached, and a deformation target in the plate material. A heater for heating the part by induction heating, and a processing tool for pressing the deformation target part to deform the plate member, and the receiving jig suppresses heat transfer from the plate member to the rotating shaft. A spinning molding apparatus configured as described above is provided.

According to the above configuration, heat transfer from the plate material to the rotating shaft is suppressed by the receiving jig itself, so that heat transfer from the plate material to the rotating shaft can be reduced. Thereby, the quality change and durability deterioration of a rotating shaft can be suppressed.

For example, the receiving jig is configured in any one of the following aspects 1) to 4).
1) The receiving jig includes a disk-shaped main body portion, and a heat insulating material disposed between the main body portion and the plate member or between the main body portion and the rotating shaft.
2) The receiving jig includes a disk-shaped main body portion and a ring portion that protrudes from a peripheral edge portion of the main body portion and contacts the plate member.
3) The receiving jig has a hollow structure in which the internal space is filled with air or the internal space is vacuum.
4) An opening is provided in the center of the plate material, and the receiving jig includes a disc-shaped main body portion on which an edge portion surrounding the opening in the plate material is placed, and the rotation shaft from the main body portion. A cylindrical portion that protrudes in the axial direction and engages with the opening.

In the aspect of 2), the cross-sectional shape of the ring portion may be sharp toward the plate member, and a plurality of the ring portion may be connected to the inner peripheral surface and the outer peripheral surface of the ring portion. A through hole or a groove may be provided.

In any of the above-described aspects 1) to 4), the spinning molding apparatus includes a fixing jig for sandwiching the plate material with the receiving jig, and the fixing jig to which the fixing jig is attached. A pressure rod that presses the plate material against the receiving jig; and the fixing jig may be configured to suppress heat transfer from the plate material to the pressure rod. According to this configuration, heat transmitted from the plate material to the pressure rod via the fixing jig can be reduced, and deterioration of the pressure rod and deterioration of durability can be suppressed.

For example, the fixing jig is configured in any one of the following modes 5) to 7).
5) The fixing jig includes a disk-shaped main body, and a heat insulating material disposed between the main body and the plate member or between the main body and the pressure rod.
6) The fixing jig includes a disk-shaped main body portion and a ring portion that protrudes from a peripheral edge portion of the main body portion and contacts the plate member.
7) The fixing jig has a hollow structure in which the internal space is filled with air or the internal space is vacuum.

In the aspect of 6), a cross-sectional shape of the ring portion may be pointed toward the plate member, and a plurality of the ring portion may be connected to the inner peripheral surface and the outer peripheral surface of the ring portion. A through hole or a groove may be provided.

Further, according to another aspect of the present invention, a receiving jig that supports a central portion of a plate material to be molded, a rotating shaft to which the receiving jig is attached, and a deformation target portion of the plate material are heated by induction heating. A heater that presses the portion to be deformed to deform the plate material, and a fixing jig that sandwiches the plate material with the receiving jig, and the fixing jig includes a peripheral wall and a ceiling wall. The air supplied to the inside of the fixing jig from the inlet provided in the center of the ceiling wall by the air blowing means is formed in the shape of the plate material side by the air blowing means. A spinning forming device configured to flow out of an outlet is provided.

According to the above configuration, since heat applied to the plate material is released to the air flowing through the fixing jig, heat transfer from the plate material to the rotating shaft via the receiving jig can be reduced. Thereby, the quality change and durability deterioration of a rotating shaft can be suppressed.

The receiving jig is formed in a shape that opens to the plate material side by a peripheral wall and a bottom wall, and air supplied to the inside of the fixing jig is provided through the opening provided in the plate material. You may be comprised so that it may be guide | induced also inside and discharged | emitted from the discharge port provided in the said surrounding wall. According to this configuration, since heat is released from the receiving jig itself to the air flowing through the receiving jig, heat transfer to the rotating shaft can be further reduced.

The bottom wall of the receiving jig is provided with a through hole in a region overlapping the rotary shaft, and the rotary shaft is formed with a ventilation path that communicates the through hole with a space around the rotary shaft. It may be. According to this configuration, the rotating shaft can be more effectively protected from heat.

The heater may be disposed on the opposite side of the processing tool with the plate material interposed therebetween. According to this configuration, regardless of the shape of the plate material being processed, the heater can be positioned in the immediate vicinity of the deformation target portion of the plate material, and the deformation target portion can be appropriately heated.

According to the present invention, heat transmitted from the plate material to the rotating shaft via the receiving jig can be reduced.

It is a schematic block diagram of the spinning shaping | molding apparatus which concerns on 1st Embodiment of this invention. 2A is a plan view of the heater, and FIG. 2B is a cross-sectional view taken along line II-II in FIG. 2A. It is sectional drawing of the principal part of the spinning shaping | molding apparatus shown in FIG. It is sectional drawing of the principal part of the spinning shaping | molding apparatus which concerns on 2nd Embodiment of this invention. It is sectional drawing of the principal part of the spinning shaping | molding apparatus which concerns on 3rd Embodiment of this invention. It is sectional drawing of the principal part of the spinning shaping | molding apparatus which is a 1st modification of 3rd Embodiment. It is sectional drawing of the principal part of the spinning shaping | molding apparatus which is a 2nd modification of 3rd Embodiment. FIG. 8A is a cross-sectional view of a main part of a spinning forming apparatus that is a third modification of the third embodiment, and FIG. 8B is a plan view of a receiving jig. It is sectional drawing of the principal part of the spinning molding apparatus which concerns on 4th Embodiment of this invention. It is sectional drawing of the principal part of the spinning shaping | molding apparatus which concerns on 5th Embodiment of this invention. It is sectional drawing of the principal part of the spinning shaping | molding apparatus which concerns on 6th Embodiment of this invention. It is sectional drawing of the principal part of the spinning shaping | molding apparatus which concerns on 7th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 shows a spinning molding apparatus 1A according to the first embodiment of the present invention. This spinning molding apparatus 1 </ b> A includes a rotating shaft 2, a receiving jig 3 attached to the rotating shaft 2, and a fixing jig 4. The receiving jig 3 supports the central portion of the plate material 9 to be molded, and the fixing jig 4 holds the plate material 9 with the receiving jig 3. Further, the spinning forming apparatus 1A presses the deformation target portion 91 and the heater 6 that locally heats the deformation target portion 91 that is a predetermined distance r away from the axis 20 of the rotating shaft 2 in the plate 9 by induction heating. And a processing tool 7 for deforming the plate material 9.

The direction (axial direction) in which the axis 20 of the rotating shaft 2 extends is the vertical direction in this embodiment. However, the axial direction of the rotating shaft 2 may be a horizontal direction or an oblique direction. The lower part of the rotating shaft 2 is supported by the base 11, and a motor (not shown) for rotating the rotating shaft 2 is disposed in the base 11. The upper surface of the rotating shaft 2 is flat, and the receiving jig 3 is fixed to the upper surface.

The plate material 9 is, for example, a flat circular plate. However, the shape of the plate member 9 may be a polygonal shape or an elliptical shape. Further, the plate material 9 does not necessarily have to be flat over the entire surface. For example, the thickness of the central portion may be greater than the thickness of the outer peripheral portion, or the whole or a part thereof may be processed into a tapered shape in advance. . Although the material of the board | plate material 9 is not specifically limited, For example, it is a titanium alloy.

The receiving jig 3 has a size that fits in a circle defined by the molding start position of the plate material 9. For example, when the receiving jig 3 has a circular shape in plan view, the maximum diameter of the receiving jig 3 is equal to or less than the diameter of the circle defined by the molding start position in the plate material 9. Further, unlike the conventional mold, the plate member 9 is not deformed by being pressed against the side surface of the receiving jig 3 facing the radially outer side.

The fixing jig 4 is attached to the pressure rod 52. The pressure rod 52 is driven in the vertical direction by the drive unit 53, thereby receiving the plate material 9 via the fixing jig 4 and pressing it against the jig 3. For example, the pressure rod 52 and the drive unit 53 are hydraulic cylinders, and the drive unit 53 is fixed to the frame 12 disposed above the rotating shaft 2, and the pressure rod 52 is rotatably supported by the drive unit 53. Built-in bearing.

Although the heater 6 and the processing tool 7 are located on opposite sides of the axis 20 of the rotating shaft 2, it is not always necessary to be located on the opposite side. In the present embodiment, the processing tool 7 is disposed on the front surface side (upper side) of the plate material 9, and the heater 6 is disposed on the rear surface side (lower side) of the plate material 9. In other words, the heater 9 is located on the opposite side of the processing tool 7 with the plate material 9 interposed therebetween. As described above, if the heater 6 is disposed on the opposite side of the processing tool 7 with the plate 9 interposed therebetween, the heater 6 can be deformed by the deformation target portion 91 of the plate 9 regardless of the shape of the plate 9 being processed. Can be located in the immediate vicinity. Thereby, the deformation | transformation object site | part 91 can be heated appropriately. However, the heater 6 may be disposed on the surface side of the plate 9 so that the heater 6 is located on the same side as the processing tool 7.

The heater 6 is moved in the radial direction around the axis 20 of the rotating shaft 2 by the first horizontal movement mechanism 15, and the first horizontal movement mechanism 15 is moved in the vertical direction by the first vertical movement mechanism 16. Be made. Similarly, the processing tool 7 is moved in the radial direction around the axis 20 of the rotating shaft 2 by the second horizontal movement mechanism 13, and the second horizontal movement mechanism 13 is moved vertically by the second vertical movement mechanism 14. Moved in the direction. The first vertical movement mechanism 16 and the second vertical movement mechanism 14 extend so as to bridge the base 11 and the frame 12 described above.

In this embodiment, a roller that rotates following the rotation of the plate 9 is used as the processing tool 7. However, the processing tool 7 is not limited to a roller, and may have a spatula.

2A and 2B, the heater 6 includes a conductive wire 61 having a double arc-shaped coil portion 62 and a core 65 for concentrating the magnetic force generated around the coil portion 62. The coil portion 62 includes a pair of arc portions that are separated from each other in the radial direction around the axis 20 of the rotating shaft 2. The core 65 is supported by a support plate (not shown). The frequency of the alternating current flowing through the conducting wire 61 is not particularly limited, but is preferably a high frequency of 5 k to 400 kHz. That is, the induction heating by the heater 6 is desirably high frequency induction heating. In the induction heating, due to the skin effect, the lower surface of the deformation target portion 91 facing the coil portion 62 becomes the highest temperature. For example, when the material of the plate member 9 is a titanium alloy, the temperature of the lower surface of the deformation target portion 91 is about 500 to 1000 ° C.

Next, the details of the receiving jig 3 and the fixing jig 4 will be described with reference to FIG.

The receiving jig 3 is configured to suppress heat transfer from the plate material 9 to the rotating shaft 2. Specifically, the receiving jig 3 includes a disc-shaped main body 31 perpendicular to the axis 20 (see FIG. 1) of the rotating shaft 2, and a heat insulating material 32 disposed between the main body 31 and the plate 9. including. The main body 31 is made of metal. The heat insulating material 32 may be organic or inorganic, but desirably has a certain degree of rigidity so that the thickness does not change even when the pressure rod 52 is operated. For example, as the heat insulating material 32, a low thermal conductive material such as ceramics such as zirconia, alumina, or silicon nitride, or a titanium alloy can be used.

The fixing jig 4 is configured to suppress heat transfer from the plate material 9 to the pressure rod 52. Specifically, the fixing jig 4 includes a disc-shaped main body 41 perpendicular to the axis 20 of the rotating shaft 2, a heat insulating material 42 disposed between the main body 41 and the plate member 9, And a boss portion 40 having a smaller diameter than the main body portion 41 interposed between the pressure rod 52. The main body 41 is made of metal. The heat insulating material 42 may be organic or inorganic. The heat insulating material 42 of the fixing jig 4 may be organic or inorganic, like the heat insulating material 32 of the receiving jig 3. The material of the heat insulating material 42 may be the same as or different from the material of the heat insulating material 32.

In the illustrated example, the diameter of the main body portion 41 of the fixing jig 4 is slightly smaller than the diameter of the main body portion 31 of the receiving jig 3, but their magnitude relationship may be reversed, or both diameters are equal. May be.

As described above, in the spinning molding apparatus 1A of the present embodiment, since the receiving jig 3 includes the heat insulating material 32, heat transfer from the plate material 9 to the rotating shaft 2 is suppressed by the receiving jig 3 itself. For this reason, heat transfer from the plate material 9 to the rotating shaft 2 can be reduced, and deterioration and durability deterioration of the rotating shaft 2 can be suppressed.

In the present embodiment, since the fixing jig 4 also includes the heat insulating material 42, heat transmitted from the plate 9 to the pressure rod 52 via the fixing jig 4 can be reduced. Alteration and durability deterioration can be suppressed.

<Modification>
In the above-described embodiment, the pressure rod 52 receives the plate material 9 via the fixing jig 4 and presses it against the jig 3. However, the pressure rod 52 is not necessarily required. For example, the fixing jig 4 may be fixed to the receiving jig 3 together with the plate material 9 by a fastening member such as a bolt or a clamp. In this case, the fixing jig 4 may be composed of only the main body portion 41. This modification is also applicable to each embodiment described later.

Moreover, in the said embodiment, although the processing tool 7 is arrange | positioned above the board | plate material 9, and the board | plate material 9 is processed into the shape opened downward so that the receiving jig 3 may be accommodated by the processing tool 7, The plate 9 may be processed into a shape that is disposed below the plate 9 and opens upward so as to accommodate the fixing jig 4 by the processing tool 7. Alternatively, in order to give unevenness to the plate material 9, the position of the processing tool 7 may be changed from above the plate material 9 to below or vice versa during the processing of the plate material 9.

(Second Embodiment)
Next, with reference to FIG. 4, the spinning shaping | molding apparatus 1B which concerns on 2nd Embodiment of this invention is demonstrated. Note that, in this embodiment and third to seventh embodiments described later, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

The spinning molding apparatus 1B of this embodiment has the same configuration as the spinning molding apparatus 1A of the first embodiment except for the receiving jig 3 and the fixing jig 4. In the present embodiment, the heat insulating material 32 of the receiving jig 3 is disposed not between the main body 31 and the plate 9 but between the main body 31 and the rotating shaft 2. Similarly, the heat insulating material 42 of the fixing jig 4 is disposed not between the main body portion 41 and the plate material 9 but between the boss portion 40 and the pressure rod 52.

Even with such a configuration, the same effect as the spinning device 1A of the first embodiment can be obtained.

(Third embodiment)
Next, with reference to FIG. 5, a spinning molding apparatus 1C according to a second embodiment of the present invention will be described. Also in this embodiment, the receiving jig 3 is configured to suppress heat transfer from the plate material 9 to the rotating shaft 2, and the fixing jig 4 suppresses heat transfer from the plate material 9 to the pressure rod 52. It is configured.

The receiving jig 3 includes a disk-shaped main body 31 perpendicular to the axis 20 of the rotating shaft 2 and a ring portion 33 that rises from the peripheral edge of the main body 31 and contacts the plate 9. In the present embodiment, since the upper surface of the ring portion 33 is flat, the ring portion 33 is in surface contact with the plate material 9.

The fixing jig 4 includes a disc-shaped main body portion 41 perpendicular to the axis 20 of the rotating shaft 2, a ring portion 43 that hangs down from the peripheral edge of the main body portion 41 and contacts the plate member 9, the main body portion 41, and the pressurization A boss portion 40 having a smaller diameter than the main body portion 41 interposed between the rod 52 and the rod 52 is included. In the present embodiment, since the lower surface of the ring portion 43 is flat, the ring portion 43 is in surface contact with the plate material 9.

<Modification>
In the embodiment, the cross-sectional shape of the ring portion 33 of the receiving jig 3 is rectangular. However, as shown in FIG. 6, the cross-sectional shape of the ring portion 33 of the receiving jig 3 faces upward toward the plate material 9. A sharp triangular shape may be used. In this case, the ring portion 33 is in line contact with the plate material 9. Such a configuration is particularly useful when the plate material 9 is bent at the contact position between the ring portion 33 and the plate material 9. The triangular shape that is the cross-sectional shape of the ring portion 33 may be a right-angled triangle as shown in FIG. 6, or may be an isosceles triangle that is inclined on both sides from the apex that contacts the plate material 9.

Similarly, although not shown, the cross-sectional shape of the ring portion 43 of the fixing jig 4 may be a triangular shape pointed downward toward the plate material 9.

Further, as shown in FIG. 7, a plurality of through holes 34 may be provided in the ring portion 33 of the receiving jig 3 so as to connect the inner peripheral surface and the outer peripheral surface of the ring portion 33. Through the through hole 34, heat transfer to the rotating shaft 2 can be further reduced.

Similarly, the ring portion 43 of the fixing jig 4 may be provided with a plurality of through holes 44 so as to connect the inner peripheral surface and the outer peripheral surface of the ring portion 43. The heat transfer to the pressure rod 52 can be further reduced by the through hole 44.

Alternatively, as shown in FIGS. 8A and 8B, a plurality of grooves 35 are formed in the ring portion 33 of the receiving jig 3 so as to connect the inner peripheral surface and the outer peripheral surface of the ring portion 33 instead of the through hole 34. It may be provided. Similarly, the ring portion 43 of the fixing jig 4 may be provided with a plurality of grooves 45 so as to connect the inner peripheral surface and the outer peripheral surface of the ring portion 43 instead of the through hole 44. The depth of the groove (35 or 45) may be the same as or lower than the height of the ring portion (33 or 43).

Further, when the through hole (34 or 44) or the groove (35 or 45) is provided in the ring part (33 or 43), the cross-sectional shape of the ring part may be a triangular shape that is pointed toward the plate material 9.

(Fourth embodiment)
Next, with reference to FIG. 9, the spinning shaping | molding apparatus 1D which concerns on 4th Embodiment of this invention is demonstrated. Also in this embodiment, the receiving jig 3 is configured to suppress heat transfer from the plate material 9 to the rotating shaft 2, and the fixing jig 4 suppresses heat transfer from the plate material 9 to the pressure rod 52. It is configured.

Specifically, the receiving jig 3 is composed of only a hollow main body 31, and the fixing jig 4 is composed of a hollow main body 41 and a boss 40. The internal space 37 of the main body 31 of the receiving jig 3 may be filled with air or a vacuum. Similarly, the internal space 47 of the main body 41 of the fixing jig 4 may be filled with air or a vacuum. In order to manufacture a jig main body having a vacuum inside space, a sealed box body may be formed in the vacuum chamber by electron beam welding.

(Fifth embodiment)
Next, with reference to FIG. 10, the spinning shaping | molding apparatus 1E which concerns on 5th Embodiment of this invention is demonstrated. Also in this embodiment, the receiving jig 3 is configured to suppress heat transfer from the plate material 9 to the rotating shaft 2. On the other hand, the fixing jig 4 is composed of only a disc-shaped main body 41 and a boss 40 that are perpendicular to the axis 20 of the rotating shaft 2.

In this embodiment, a circular opening 92 is provided in the center of the plate 9. The receiving jig 3 includes a disc-shaped main body portion 31 that is perpendicular to the axis 20 of the rotating shaft 2, and a circular cylindrical portion 30 that protrudes upward from the main body portion 31 at the center of the main body portion 31. The outer diameter of the cylindrical portion 30 is set substantially equal to the diameter of the opening 92. That is, an edge portion surrounding the opening 92 in the plate member 9 is placed on the main body portion 31, and the tubular portion 30 is fitted with the opening 92. And the space inside the cylindrical part 30 functions as a heat insulation layer.

In the spinning molding apparatus 1E of the present embodiment, since the space inside the cylindrical portion 30 functions as a heat insulating layer, heat transfer from the plate material 9 to the rotating shaft 2 is suppressed by the receiving jig 3 itself. For this reason, heat transfer from the plate material 9 to the rotating shaft 2 can be reduced, and deterioration and durability deterioration of the rotating shaft 2 can be suppressed.

Further, in the present embodiment, the contact area between the fixing jig 4 and the plate material 9 is reduced by the opening 92 provided in the plate material 9, so that the pressure is transmitted from the plate material 9 to the pressure rod 52 via the fixing jig 4. Heat can be reduced, and the deterioration and durability deterioration of the pressure rod 52 can be suppressed.

(Sixth embodiment)
Next, with reference to FIG. 11, the spinning shaping | molding apparatus 1F which concerns on 6th Embodiment of this invention is demonstrated. In the present embodiment, the receiving jig 3 is composed only of a disk-shaped main body 31 that is perpendicular to the axis 20 of the rotating shaft 2.

The fixing jig 4 is formed in a shape that opens to the plate material 9 side (that is, downward) by the peripheral wall 48 and the ceiling wall 49. In other words, the fixing jig 4 has a reverse petri dish shape. The lower end surface of the peripheral wall 48 is in surface contact with the plate material 9. In the center of the ceiling wall 49, an inflow port 49a penetrating the ceiling wall 49 is provided, and the peripheral wall 48 is provided with a plurality of outflow ports 48a penetrating the peripheral wall 48. One end of an immovable air supply path 8 is connected to the inflow port 49a so that relative rotation with the fixing jig 4 is possible.

In this embodiment, the pressure rod 52 (see FIG. 1) may or may not be provided. When there is a pressure rod 52, the air supply path 8 is formed in the pressure rod 52, and when there is no pressure rod 52, the air supply path 8 is constituted by a pipe.

A blower means (not shown) is connected to the other end of the air supply path 8. A blower etc. can be used as a ventilation means. Due to the operation of the air blowing means, air is supplied from the inlet 49a of the ceiling wall 49 to the inside of the fixing jig 4 through the air supply path 8, and the air supplied to the inside of the fixing jig 4 is supplied from the outlet 48a of the peripheral wall 48. leak.

In such a configuration, the heat applied to the plate material 9 is released to the air flowing inside the fixing jig 4, so that heat transfer from the plate material 9 to the rotating shaft 2 via the receiving jig 3 is reduced. Can do. Thereby, the quality change and durability deterioration of the rotating shaft 2 can be suppressed.

In addition, as an air blower, instead of a blower connected to the other end of the air supply path 8, an impeller that is arranged inside the fixing jig 4 and generates an air flow by the rotation of the fixing jig 4. It is also possible to use. Or it is also possible to use both the air blower connected to the other end of the air supply path 8 and the impeller disposed inside the fixing jig 4 as the air blowing means.

(Seventh embodiment)
Next, with reference to FIG. 12, the spinning shaping | molding apparatus 1G which concerns on 7th Embodiment of this invention is demonstrated. This spinning molding apparatus 1G is a further improvement of the spinning molding apparatus 1F of the sixth embodiment. That is, the fixing jig 4 of the spinning molding apparatus 1G is as described in the sixth embodiment.

In this embodiment, a circular opening 92 is provided in the center of the plate 9. The receiving jig 3 is formed in a shape that opens to the plate material 9 side (that is, upward) by the peripheral wall 38 and the bottom wall 39. In other words, the receiving jig 3 has a petri dish shape. The upper end surface of the peripheral wall 38 is in surface contact with the plate material 9. The peripheral wall 38 is provided with a plurality of discharge ports 38 a penetrating the peripheral wall 38. That is, the air supplied to the inside of the fixing jig 4 is also guided to the inside of the receiving jig 3 through the opening 92 of the plate member 9 and is discharged to the outside from the discharge port 38 a of the peripheral wall 38.

With such a configuration, since heat is radiated from the receiving jig 3 itself to the air flowing through the receiving jig 3, heat transfer to the rotating shaft 2 can be further reduced.

Furthermore, in this embodiment, a configuration for actively cooling the rotating shaft 2 is adopted. For this reason, the rotating shaft 2 can be more effectively protected from heat.

Specifically, a through hole 39 a is provided in a region of the bottom wall 39 of the receiving jig 3 that overlaps the rotary shaft 2, and the rotary shaft 2 is ventilated to allow the through hole 39 a to communicate with the space around the rotary shaft 2. A path 23 is formed. For this reason, a part of the air that has flowed into the receiving jig 3 is discharged into the space around the rotary shaft 2 through the through hole 39 a and the air passage 23. In the present embodiment, the through hole 39 a is disposed at the center of the bottom wall 39, and the air passage 23 extends laterally from the cylindrical recess 21 provided at the center of the upper surface of the rotating shaft 2. It comprises a plurality of lateral holes 22.

However, the configuration for cooling the rotating shaft 2 is not limited to the structure shown in FIG. For example, the air passage 23 may be constituted by a plurality of cross-shaped or radial grooves formed on the upper surface of the rotating shaft 2. Further, the through holes 39a provided in the bottom wall 39 are not necessarily arranged at the center of the bottom wall 39, and a plurality of through holes 39a may be provided on the same circumference.

(Other embodiments)
In the first to fifth embodiments, the receiving jig 3 and the fixing jig 4 can be arbitrarily combined.

DESCRIPTION OF SYMBOLS 1A-1G Spinning molding apparatus 2 Rotating shaft 23 Air flow path 3 Receiving jig 30 Cylindrical part 31 Main body part 32 Heat insulating material 33 Ring part 34 Through-hole 35 Groove 37 Internal space 38 Peripheral wall 38a Outlet 39 Bottom wall 39a Through-hole 4 Fixation Jig 40 Boss 41 Body portion 42 Heat insulating material 43 Ring portion 44 Through hole 45 Groove 47 Internal space 48 Peripheral wall 48a Outflow port 49 Ceiling wall 49a Inlet port 52 Pressure rod 6 Heater 7 Work tool 9 Plate material 91 Deformation target portion 92 Opening

Claims

A receiving jig that supports the center of the plate to be molded;
A rotating shaft to which the receiving jig is attached;
A heater for heating the deformation target portion of the plate by induction heating;
A processing tool that presses the deformation target portion and deforms the plate material,
The spinning molding apparatus, wherein the receiving jig is configured to suppress heat transfer from the plate material to the rotating shaft.
The spinning molding according to claim 1, wherein the receiving jig includes a disk-shaped main body portion, and a heat insulating material disposed between the main body portion and the plate member or between the main body portion and the rotating shaft. apparatus.
The spinning molding apparatus according to claim 1, wherein the receiving jig includes a disk-shaped main body portion and a ring portion that protrudes from a peripheral edge portion of the main body portion and contacts the plate member.
The spinning molding apparatus according to claim 3, wherein a cross-sectional shape of the ring portion is pointed toward the plate member.
The spinning forming apparatus according to claim 3 or 4, wherein the ring portion is provided with a plurality of through holes or grooves so as to connect the inner peripheral surface and the outer peripheral surface of the ring portion.
The spinning molding apparatus according to claim 1, wherein the receiving jig has a hollow structure in which the internal space is filled with air or the internal space is vacuum.
An opening is provided in the center of the plate material,
The receiving jig includes a disc-shaped main body portion on which an edge portion surrounding the opening in the plate material is placed, and a cylindrical portion that protrudes from the main body portion in the axial direction of the rotating shaft and fits into the opening. The spinning molding apparatus according to claim 1, comprising:
A fixing jig for sandwiching the plate material with the receiving jig;
A pressure rod attached to the fixing jig and pressing the plate material against the receiving jig through the fixing jig;
The spinning molding apparatus according to any one of claims 1 to 7, wherein the fixing jig is configured to suppress heat transfer from the plate material to the pressure rod.
The spinning jig according to claim 8, wherein the fixing jig includes a disk-shaped main body portion, and a heat insulating material disposed between the main body portion and the plate member or between the main body portion and the pressure rod. Molding equipment.
The spinning molding apparatus according to claim 8, wherein the fixing jig includes a disk-shaped main body portion and a ring portion that protrudes from a peripheral edge portion of the main body portion and comes into contact with the plate member.
The spinning molding device according to claim 10, wherein a cross-sectional shape of the ring portion is pointed toward the plate member.
The spinning molding apparatus according to claim 10 or 11, wherein the ring portion is provided with a plurality of through holes or grooves so as to connect the inner peripheral surface and the outer peripheral surface of the ring portion.
The spinning molding apparatus according to claim 8, wherein the fixing jig has a hollow structure in which the internal space is filled with air or the internal space is vacuum.
A receiving jig that supports the center of the plate to be molded;
A rotating shaft to which the receiving jig is attached;
A heater for heating the deformation target portion of the plate by induction heating;
A processing tool for deforming the plate by pressing the deformation target part;
A fixing jig for sandwiching the plate material with the receiving jig,
The fixing jig is formed in a shape that opens to the plate material side by a peripheral wall and a ceiling wall, and is supplied into the fixing jig from an inflow port provided in the center of the ceiling wall by a blowing means. A spinning molding apparatus configured such that air flows out from an outlet provided in the peripheral wall.
The receiving jig is formed in a shape that opens to the plate material side by a peripheral wall and a bottom wall, and air supplied to the inside of the fixing jig is provided through the opening provided in the plate material. The spinning molding apparatus according to claim 14, wherein the spinning molding apparatus is configured to be guided to the inside and discharged from a discharge port provided in the peripheral wall.
The bottom wall of the receiving jig is provided with a through hole in a region overlapping with the rotating shaft,
The spinning molding apparatus according to claim 15, wherein an air passage that connects the through hole to a space around the rotation shaft is formed in the rotation shaft.
The spinning molding apparatus according to any one of claims 1 to 16, wherein the heater is disposed on the opposite side of the processing tool with the plate material interposed therebetween.