JP2006231380A - Flexible stretch die and stretch forming apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flexible stretch die with which a forming surface corresponding to each forming part is formed and fine stretch forming can be carried out without performing relatively movement with respect to a long size material during forming. <P>SOLUTION: In the flexible stretch die 3 which is used for forming a frame material 60 having a first forming part 22 and a second forming part 26 which are different in positions in a forming direction 12 and in a width direction 16, a plurality of stretch units 13 provided with a first block 37 and a second block 53 which are arranged along the longitudinal direction 14 of the frame material 60 and sides of the frame material 60 of which are formed into curved surfaces, a first servomotor 29 and a second servomotor 53 for moving each of the first block 37 and the second block 53 in the forming direction 12 respectively and a first unit die base 24 and a second unit die base 42 for supporting them are attached to a base 11 correspondingly to the first forming part 22 and the second forming part 26. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stretch molding apparatus for molding a long material having a required cross section formed of a thin plate having a thickness of about 1 to 3 mm, and a flexible stretch mold used for the stretch molding apparatus.

Stretch molding is to perform molding according to the molding shape of the mold by holding the both ends of the long material and pulling it on both sides and pressing it against a mold having a molding shape.
For this reason, a mold is required every time the molding shape is different. Therefore, there are problems such as an increase in the number of molds increases manufacturing costs and requires a large storage space.
In order to solve this problem, as disclosed in Patent Document 1, a stretch mold that can change the shape of the molding has been proposed.
This is a configuration in which a molding surface is formed by a plurality of blocks, and each block can be moved individually in the molding direction (direction in which the mold and the long material come in contact with each other), and the position of each block can be changed. Thus, the shape of the molding surface, that is, the molding shape can be changed.

JP 2000-117331 A (FIGS. 1 to 7)

However, the stretch type shown in Patent Document 1 uses an extrusion mold material (aircraft longitudinal material) with a low curvature and high material rigidity as its application product, so let's apply it to a plate material (aircraft frame material) with high curvature and low material rigidity. Then, this becomes a straight line between the blocks, and there is a problem that the curvature accuracy cannot be obtained sufficiently.
Further, since the block is tilted to correspond to the curvature with respect to the molding having the curvature, the block moves in the longitudinal direction in a state where the long material is in contact with the block. For this reason, there is a problem that a long material may be damaged or damaged if it is weak.
Furthermore, since the front end surface of the block has a substantially U shape so as to correspond to a molding part having a different molding direction, it is necessary to replace the block when the position of the molding part changes. For this reason, since it is necessary to prepare a block for every different kind of long material, there existed a problem that cost correspondingly increased.
Further, when the curvature is dealt with by tilting the block, there is a possibility that the tilting of the block becomes incomplete due to friction between the long material and the block and the correspondence to the curvature becomes insufficient. This is highly likely when the curvature is large, but if the curved part is long at this time, the distance between the molding parts of the long material will be greatly different, so some molding parts abut against the block. Therefore, there is a fear that the desired molding cannot be performed.

  In view of the above problems, the present invention is capable of forming a molding surface corresponding to each molding site, and a flexible stretch mold capable of performing good stretch molding without relative movement with respect to a long material during molding and the same. An object of the present invention is to provide a stretch molding apparatus using the above-mentioned.

In order to solve the above problems, the present invention employs the following means.
That is, the flexible stretch die according to the present invention is a flexible stretch die used for forming a long material having a plurality of forming portions having different positions in the forming direction and the width direction, and is arranged along the longitudinal direction of the long material. And a plurality of blocks each having a curved surface on the long material side, a plurality of moving means for moving each of the blocks in the molding direction, and a supporting member for supporting the moving means and the block. A plurality of mold forming means are attached to the base in correspondence with the respective molding parts.

As described above, since the mold forming means is provided for each forming portion having a different position in the forming direction and the width direction of the long material, in each mold forming means, each moving means is driven to set each block to a predetermined position. By moving, a molding surface corresponding to each molding site can be formed.
Further, since the molding means can form the molding surface independently, even if the dimension of the long material is changed and the position of the molding site is changed, it is possible to cope without exchanging the block.
Furthermore, since the long material side of each block is formed with a curved surface, the contact between the molding surface formed by each mold forming means and the long material becomes a surface or a curved surface. For this reason, since it does not hit an acute line shape with respect to a long material, a long material does not bend and a long material is not damaged.
Here, the “molding part” means a part that substantially needs to be molded, for example, a part having a predetermined amount of thickness in the width direction.
Further, as the width of the block is narrowed, non-contact portions existing between the blocks are reduced, so that smooth curve processing without flaws and the like can be performed.

  In the flexible stretch mold according to the present invention, the support member of at least one of the mold forming means is attached to another mold forming means.

  In this way, since the support member of at least one of the mold forming means is attached to another mold forming means, the interval between the mold forming means can be reduced. For this reason, since the block space | interval of each shaping | molding means can be made small, the shaping | molding site | part which can respond can be increased.

  In the flexible stretch mold according to the present invention, each mold forming means includes a buffer member that integrally covers the front end surface of each block.

As described above, each mold forming means includes the buffer member that integrally covers the front end surface of each block. Therefore, during the molding process, the long material is processed by the block via the buffer member.
For this reason, since a long material will be given a reaction force by a buffer member also in the non-contact part which exists between adjacent blocks, it can carry out smooth fabrication.
In particular, when applied to a long material having a small strength and formed of a thin plate, since the force applied to the long material is dispersed, defects such as flaws can be further reduced.
The buffer member preferably has a certain amount of repulsive force. For example, a metal such as aluminum or stainless steel or a resin such as polyester is used.
When aluminum or stainless steel is used, the reaction force acting on the long material can be increased even if it is thinned, so that it is easy to control the molding accuracy while preventing damage.

  Moreover, in the flexible stretch type | mold concerning this invention, the said buffer member is attached so that the length of the part corresponding to each said block part can be adjusted.

When the molding shape of the long material is changed (for example, the curvature is changed) and the molding direction position of each block is changed, the length of the portion corresponding to each block portion, that is, the molding processing length changes. become.
In this case, since the buffer member is attached by adjusting the length of the portion corresponding to each block portion, this change can be accommodated.

  Moreover, in the flexible stretch type | mold concerning this invention, each said supporting member is divided | segmented into plurality along the said longitudinal direction.

Thus, since each support member is divided | segmented into multiple along the longitudinal direction, the length of the width direction of a shaping | molding means can be adjusted by making it increase / decrease in the divided support member unit.
For this reason, when the longitudinal direction length of a long material is changed, it can respond to it rapidly.

  A stretch molding device according to the present invention is arranged to face the flexible stretch mold according to claim 1 and the flexible stretch mold, hold both ends of the long material, and pull in the longitudinal direction. A stretching means for applying a force, and the elongated means and the flexible stretch mold are relatively displaced to form the long material along the flexible stretch mold.

  In this way, a mold surface can be formed independently corresponding to each molding site having different positions in the molding direction and width direction of the long material, and the molding surface and the long material are in contact with each other as a surface or a curved surface. Since stretch molding is performed using a flexible stretch mold provided with molding means, even if the length of the long material changes and the position of the molding site changes, it can be handled without replacing the block. Can be molded without bending or scratching.

According to the present invention, since the mold forming means is provided for each of the molding parts having different positions in the molding direction and the width direction of the long material, a molding surface corresponding to each molding part can be formed.
Further, since the molding means can form the molding surface independently, even if the dimension of the long material is changed and the position of the molding site is changed, it is possible to cope without exchanging the block.
Furthermore, since the long material side of each block is formed with a curved surface, the long agent is not bent and the long material is not damaged.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
This embodiment is applied to the stretch molding apparatus 1 that stretch-molds a frame constituting the fuselage structure 20 of the large aircraft 10 shown in FIG.
As shown in FIG. 7, the fuselage structure 20 includes a skin 30 that handles a part of the tensile and compression loads, and a stringer 40 that is provided along the longitudinal direction of the fuselage and mainly handles the bending load in the longitudinal direction of the fuselage. The frame 50 is provided mainly in a direction orthogonal to the stringer 40 and maintains the body shape.
These are made of, for example, an aluminum alloy for weight reduction.
In the large aircraft 10, the fuselage is configured by joining a plurality of fuselage structures 20. Therefore, the frame 50 is processed by stretch molding into an arc shape that constitutes a part of the circumference, for example.

The cross-sectional shape of the frame 50 is such that, for example, as shown in FIG. 2, the upper and lower ends of the plate 18 are bent at right angles in opposite directions, and the tip of the upper end is bent at a substantially right angle further downward. is doing. Because of this cross-sectional shape, it is called a Z-shaped frame.
The frame material (long material) 60 before being bent similarly has a Z-shaped cross section, and is bent along the plane of the central plate portion of the Z-shaped cross section. Accordingly, in the bending direction, that is, in the width direction 16 orthogonal to the molding direction 12, the first molding portion (a portion bent substantially at a right angle from the plate 18) 22 and the second molding portion (substantially from the plate 18). 26) that is bent at a right angle. Note that the second molding portion 26 is further bent substantially perpendicular to the molding direction 12.
The frame 50 has different curvature and length depending on the position of the body. In the case of the large aircraft 10, the arc length is, for example, 3 to 5 m, the radius of curvature is, for example, 2.5 to 3 m, the height is, for example, about 10 cm, and the width is, for example, about 7 cm. On the other hand, the plate thickness is, for example, about 1.25 to 2.54 mm, which is why delicate stretch molding is required.

FIG. 1 is a plan view showing an overall schematic configuration of the stretch molding apparatus 1.
The stretch molding apparatus 1 includes a flexible stretch mold 3, a stretch means 5, a mold moving means 7 that moves the flexible stretch mold 3, and an operation device 9.
The stretch means 5 includes a stretch main body 17 that is installed so as to be opposed to and away from each other, and a chucking 19 that is provided on opposite surfaces of each stretch main body 17 and holds both ends of the frame material 60. It has been. The stretch main body 17 is driven so as to contact and separate from each other along the longitudinal direction 14 of the held frame material 60.

The flexible stretch mold 3 includes a base 11, a plurality of stretch mold units 13, and a plurality of unit driving means 15.
The base 11 is provided on the floor so as to be movable in a molding direction 12 orthogonal to the longitudinal direction 14.
The stretch-type units 13 are arranged adjacent to each other, and are attached to the base 11 so as to be movable in the molding direction 12. At the front end of each stretch-type unit 13, blocks forming a molding surface are provided in a state of being stacked in two upper and lower stages.

FIG. 2 is a perspective view showing the overall schematic configuration of the stretch unit 13. FIG. 3 is a sectional view taken along line XX in FIG.
The stretch type unit 13 includes a first block unit 21 and a second block unit 23 installed on the first block unit 21.
The first block unit 21 includes a first unit type base 24, a first piece guide member 25, a first bracket 27, a hydraulic first servo motor 29, a first speed reducer 31, and a first movement. A screw 33, a first piece 35, and a first block 37 are provided.
The first unit type base 24 has a rectangular plate shape, and its long side is disposed along the molding direction 12 and is slidable with respect to the base 11.

The first piece guide member 25 has a substantially rectangular parallelepiped shape and is fixedly attached to the upper portion of the first unit type base 24. On the upper surface of the first piece guide member 25, a plurality of, for example, five rectangular grooves extending in the molding direction and extending over the entire length are provided.
The first piece 35 has a rectangular parallelepiped shape and is slidably fitted in each groove of the first piece guide member 25.
The first bracket 27 extends in a direction orthogonal to the molding direction having an L-shaped cross section, and is fixedly attached to the upper portion of the first unit mold base 21. The first servo motor 29 has a plurality of, for example, five, along the longitudinal direction (the direction orthogonal to the molding direction 12) of the first bracket 27, and the rotation axis thereof substantially coincides with the axis of the first piece 35. Is attached.

A plurality of, for example, five first moving screws 33 are provided, and each of the first moving screws 33 is screwed into the first piece 35 so that the axis center thereof substantially coincides with the axis center of the first piece 35. The first moving screw 33 is configured to be rotated by the rotation shaft of the first servo motor 29 via the first speed reducer 31 fixed to the upper surface of the unit type base.
The first moving screw 33 and the first piece 25 are trapezoidal screws.
The first block 37 has a shape in which a semi-cylinder having an axial center in the vertical direction is added to one end of a rectangular parallelepiped. The first block 37 is fixed to the upper surface of the first piece 35 on the stretch means 5 side so that at least the semi-cylindrical portion protrudes.
A buffer member holding bracket 39 is attached to the lower surface of the first block 37 on the stretch means 5 side.

The second block unit 23 includes a second unit type base 42, a second piece guide member 41, a second bracket 43, a hydraulic second servo motor 45, a second speed reducer 47, and a second movement. A screw 49, a second piece 51, and a second block 53 are provided.
The second unit type base 42 has a rectangular plate shape and is fixed to the upper surface of the first piece guide member 25. The second unit type base 42 has a function of supporting the second block unit 23 and guiding the upper side of the first piece 35. A gap is provided between the second unit type base 42 and the first block 37 so that the first block 37 can move.
The second piece guide member 41 has a substantially rectangular parallelepiped shape, and is fixedly attached to the upper part of the second unit type base 42 on the stretch means 5 side. The upper surface of the second piece guide member 41 is provided with a plurality of, for example, five rectangular grooves extending in the molding direction and extending over the entire length.
The second piece 51 has a rectangular parallelepiped shape and is slidably fitted in each groove of the second piece guide member 41.

The second bracket 43 extends in a direction orthogonal to the molding direction having an L-shaped cross section, and is fixedly attached to the upper portion of the second unit mold base 42. The second servo motor 45 has a plurality of, for example, five, along the longitudinal direction (direction orthogonal to the molding direction 12) of the second servo motor 45, and the rotation axis thereof substantially coincides with the axis of the second piece 51. Is attached.
A plurality of, for example, five second moving screws 49 are provided, and each of the second moving screws 49 is screwed to the second piece 51 so that the center of the axis substantially coincides with the center of the axis of the second piece 51. The second moving screw 49 is configured to be rotated by the rotation shaft of the second servomotor 45 via a second speed reducer 47 fixed to the upper surface of the second unit type base 42.
The second moving screw 49 and the second piece 51 are trapezoidal screws.
The second block 53 has a shape in which a semi-cylinder whose axis center is directed in the vertical direction is added to two ends of a rectangular parallelepiped. The second block 53 is fixed to the upper surface of the second piece 51 on the stretch means 5 side so that at least the semicylindrical portion protrudes.

A cover 55 is attached to the upper surface of the second piece guide member 41 by a bolt from an attachment member 59 via an intermediate member 57. The cover 55 has a function of guiding the upper surface of the second piece 51.
The attachment member 59 is provided so as to protrude from the intermediate member 57 to the stretch means 5 side. A holding plate 61 is disposed between the attachment member 59 and the second block 53. The pressing plate 61 is attached to the attachment member 59 by a bolt 63 via a spring, and moves up and down by rotating the bolt 63 and is positioned on the stretch means 5 side of the second block 53. It is configured so that it can be adjusted according to the thickness of the material 60.

The first blocks 37 in all the stretch-type units 13 are integrated to form the lower molding surface of the frame material 60, and the second blocks 53 are integrated to form the upper molding surface of the frame material 60. .
A first buffer member 65 is attached to the frame material 60 side of the lower molding surface, and a second buffer member 67 is attached to the frame material 60 side of the upper molding surface.
The first buffer member 65 and the second buffer member 67 are formed of an aluminum plate having a thickness of 5 mm. In addition, this may be a stainless steel plate or a resin such as polyester. In the case of resin, it is necessary to increase the thickness in order to secure the repulsive force.

Mounting brackets 69, 71, 73, 75 are provided on the end sides of the stretch-type unit 13 at both ends.
The first buffer member 65 is attached to the mounting bracket 69 and the mounting bracket 73 by bolts, and the second buffer member 67 is attached to the mounting bracket 71 and the mounting bracket 75 by bolts. On the mounting bracket 73 and 75 side of the first buffer member 65 and the second buffer member 67, a recess 77 extending in the longitudinal direction is provided, and a long hole 79 is provided along the recess 77. The fixing position of the bolt 81 can be adjusted by the long hole 79.

The unit driving means 15 is provided so as to move it in the molding direction 12 for each stretch-type unit 13 as shown in FIG. As the unit driving means 15, for example, a hydraulic cylinder is used.
In the present embodiment, for the two units of the stretch type unit 13 provided in the center portion, the required moving distance varies only within a range that can be adjusted by the movement of the blocks 31 and 33, so one unit driving means 15 is configured to be driven in common.

The mold moving means 7 is installed on the floor, and is configured to move the flexible stretch mold 3 in the molding direction so as to contact and separate from the stretch means 5. The mold moving means 7 uses, for example, a hydraulic drive.
The operating device 9 includes processing means 83, storage means 85, current position detection means 87, unit control means 89, and system control means 91.
The storage means 85 is a ROM and stores necessary information such as the shape information of the input frame 50.
The current position detection means 87 detects the individual positions of the first block 37 and the second block 53 in each stretch type unit 13 and the cylinder position of the unit driving means 15, and thereby detects each first block 37 and each second block. The position of 53 with respect to the base 11 is calculated.

The processing means 83 performs various required processes by the CPU. For example, each first block 37 and each second block 53 is obtained from the shape information of the frame 50 formed from the storage means and the position information of each first block 37 and each second block 53 from the current position detection means 87. The required position is calculated. Then, the operation amount of each unit driving means 15, each first servo motor 29 and each second servo motor 45 necessary for changing based on it is calculated and transmitted to the unit control means 89.
The unit control means 89 controls the operation of each unit driving means 15, each first servo motor 29 and each second servo motor 45 based on information from the processing means 83.
The system control means 91 controls the operation of the mold moving means 7 and the stretch means 5.

The forming operation of the stretch forming apparatus 1 according to the present embodiment described above will be described.
First, formation of the molding surface in the flexible stretch mold 3 will be described.
The shape data of the frame 50 formed by stretch molding is input to the storage means 85 from the drawing data or the like. This may be selected and used in advance.
This shape data is sent to the processing means 83. The processing means 83 calculates the contact position between the frame material 60 and the first block 37 and the second block 53 from the shape data.
Then, the processing device 83 compares the individual positions of the first block 37 and the second block 53 in each stretch type unit 13 sent from the current position detecting means 87 with the information on the cylinder position of each unit driving means 15. The operation amounts of the first servo motors 29, the second servo motors 45 and the unit driving means 15 are calculated and transmitted to the unit control means 89.

Based on this information, the unit control means 89 transmits a control signal to the unit driving means 15 and each stretch type unit 13.
Each unit driving means 15 arranges each stretch mold unit 13 at a required position along the molding direction 12.
In each stretch type unit 13, the first servo motor 29 is driven, and the first moving screw 33 is rotated via the first speed reducer 31. By the rotation of the first moving screw 33, the screwed first piece 35 moves in the molding direction 12 with respect to the first piece guide member 25 (first unit mold base 24), and accordingly the first block 37 is moved. It moves in the molding direction 12 and is set to the required position.
At the same time, the second servo motor 45 is driven, and the second moving screw 49 is rotated via the second speed reducer 47. By the rotation of the second moving screw 49, the screwed second piece 51 moves in the molding direction 12 with respect to the second piece guide member 41, and accordingly, the second block 53 moves in the molding direction 12, and the required The position is set.
In this way, a molding surface corresponding to the first molding part 22 can be formed by each first block 37, and a molding surface corresponding to the second molding part 26 can be formed by each second block 53. .

At this time, the frame 50 has a substantially arc shape, and on the other hand, the first block 37 and the second block 53 move along the molding direction 12, so that the interval between the first block 37 and the second block 53 goes to the end. It gets bigger.
This relationship will be described with reference to FIG. In the arc-shaped frame 50, the curvature of the inner surface I (processed surface by the second block 53) is larger (the radius of curvature is smaller) than the outer surface O (processed surface by the first block 37). In FIG. 5, an alternate long and two short dashes line 95 indicates a state in which the outer surface O is translated. That is, the distance L along the forming direction 12 between the outer surface O and the two-dot chain line 95 is constant.
The distance between the first block 37 and the second block 53 is the distance L at the central portion A, but at the point B, the distance ΔL1 is obtained by adding the distance ΔL1 between the inner surface I and the two-dot chain line 95. Is L + ΔL2 obtained by adding the distance ΔL2 between the inner surface I and the two-dot chain line 95. Since ΔL2 is larger than ΔL1, the distance along the molding direction 12 between the outer surface O and the inner surface I increases as the distance from the central portion A increases.

In the present embodiment, since the first block 37 and the second block 53 can move independently as described above, the required molding surface can be provided even on curved surfaces having different curvatures despite being moved in the molding direction 12. Can be formed.
Moreover, even if the dimension of the frame material 60 changes and the position of the 1st shaping | molding site | part 22 and the 2nd shaping | molding site | part 26 changes, it can respond to it.

When the molding surface by the first block 37 and the second block 53 is formed, the first buffer member 65 and the second buffer member 67 are attached so as to cover the molding surface.
The first buffer member 65 is fixed to the mounting bracket 73 by a bolt 81 with one end attached to the mounting bracket 69 by a bolt and the other end pulled by an appropriate tension.
The second buffer member 67 is fixed to the mounting bracket 75 by a bolt 81 with one end attached to the mounting bracket 71 by a bolt and the other end pulled by an appropriate tension.
Here, the appropriate tension is, for example, such that a gap with respect to a line connecting the contact points of the adjacent first blocks 37 is about 0.3 mm.
This differs depending on the material. For example, if the material is soft such as polyester, the gap can be set small, and if the material is hard such as stainless steel, the gap can be set large, for example, around 1 mm.

  In this way, the first buffer member 65 and the second buffer member 67 have one end portions that can be adjusted in length by the long holes 79, so that the molding shape of the frame material 60 is changed (for example, the curvature is changed), Even if the position of the molding direction 12 of the one block 37 and the second block 53 is changed and the molding processing length is changed, this change can be accommodated.

In this way, when the flexible stretch mold 3 is prepared, both ends of the frame material 60 are firmly held by the chucking 19 of the stretch means 5.
At this time, the snake 93 is inserted and held in the J-shaped space on the outer surface side of the second molding portion 26. The snake 93 is a plate member having a rectangular cross section, and plays a role of maintaining this J-shape during molding.

In this state, a control signal is transmitted from the system control means 91 to the mold moving means 7 and the stretch means 5.
In the stretch means 5, the stretch body 17 is actuated and driven to separate the chucking 19 from each other along the longitudinal direction 14, thereby applying tension to the frame member 60 in the longitudinal direction.
Then, the mold moving means 7 is moved in the direction of the frame material 60 along the molding direction 12.
By the movement of the mold moving means 7, the first buffer member 65 and the second buffer member 67 come into contact with and are pressed against the first molding part 22 and the second molding part 26 of the frame material 60.
Thereby, the frame material 60 is bent into a shape along the molding surface formed by the first block 37 and the second block 53 via the first buffer member 65 and the second buffer member 67.

Thus, since the frame material 60 is processed by the first block 37 and the second block 53 via the first buffer member 65 and the second buffer member 67, the frame material 60 is adjacent to the first buffer material. Even in the non-contact portion existing between 65 and the second buffer member 67, a reaction force is applied by the first buffer member 65 and the second buffer member 67, and smooth molding can be performed.
This is because the force applied to the frame material 60 is dispersed particularly in the case of a material having a small strength, such as the frame material 60, so that defects such as flaws can be further reduced.

When the length of the frame material 60 is greatly changed, it can be dealt with by increasing or decreasing the number of the stretch type units 13. For this reason, since it can increase / decrease in units of, for example, five first blocks 37 and second blocks 53 at a time, it is possible to respond quickly to changes.
In this case, the 1st buffer member 65 and the 2nd buffer member 67 are replaced | exchanged for what was match | combined with the changed length.

  Further, when the thickness of the frame material 60 is changed, the bolts 63 and 63 are rotated, the presser plate 61 is moved up and down, and the position at which the presser plate 61 presses the frame material 60 is changed. Can do.

In the present embodiment, the first buffer member 65 and the second buffer member 67 are interposed between the molding surface formed by the first block 37 and the second block 53 and the frame material 60. The present invention is not limited to this, and the first buffer member 65 and the second buffer member 67 may not be used.
Even in this case, the frame material 60 side of each of the first blocks 37 and each of the second blocks 53 is formed with a cylindrical surface, so that the contact between them becomes a surface or a curved surface. For this reason, since the 1st buffer member 65 and the 2nd buffer member 67 do not hit an acute-angled line shape with respect to the frame material 60, the frame material 60 does not bend and a damage | wound does not occur.
In this case, the narrower the widths of the first block 37 and the second block 53, the fewer non-contact portions that exist between the adjacent first block 37 and second block 53. Curve processing can be performed.

  In this embodiment, the flexible stretch mold 3 moves toward the stretch means 5 and is molded. On the contrary, the flexible stretch mold 3 is fixed and the stretch means 5 is the flexible stretch mold 3. You may make it move to.

It is a top view which shows the whole schematic structure of the stretch molding apparatus concerning one Embodiment of this invention. It is a perspective view which shows the whole schematic structure of the stretch type unit concerning one Embodiment of this invention. It is XX sectional drawing of FIG. It is a partial front view which shows the edge part attachment of the buffer member of this invention. It is a top view which shows the positional relationship of a 1st block and a 2nd block. It is a perspective view which shows the large sized aircraft using the flame | frame which is a shaping | molding object of this invention. It is a perspective view which shows a part of trunk | drum structure of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Stretch molding apparatus 3 Flexible stretch type | mold 5 Stretching means 11 Base 12 Molding direction 13 Stretch type unit 14 Longitudinal direction 15 Unit drive means 16 Width direction 22 First molding part 24 First unit mold base 26 Second molding part 29 First servo Motor 37 First block 42 Second unit type base 45 Second servo motor 53 Second block 60 Frame material 65 First buffer member 67 Second buffer member

Claims (6)

In a flexible stretch mold used for molding a long material having a plurality of molding sites with different positions in the molding direction and the width direction,
A plurality of blocks arranged along the longitudinal direction of the long material, the long material side being formed with a curved surface,
A plurality of moving means for moving each of the blocks in the molding direction;
A flexible stretch mold in which a plurality of mold forming means provided with the moving means and a support member for supporting the block are attached to a base corresponding to each of the molding parts. The flexible stretch mold according to claim 1, wherein the support member of at least one mold forming means is attached to another mold forming means. 3. The flexible stretch mold according to claim 1, wherein each of the mold forming means includes a buffer member that integrally covers a front end surface of each of the blocks. 4. The flexible stretch type according to claim 3, wherein the buffer member is attached so that the length of the portion corresponding to each block portion can be adjusted. 5. The flexible stretch mold according to claim 1, wherein each of the support members is divided into a plurality along the longitudinal direction. A flexible stretch mold according to any one of claims 1 to 5, and a stretch means that is disposed to face the flexible stretch mold, holds both ends of the long material, and applies a tensile force in the longitudinal direction. Prepared,
A stretch molding apparatus, wherein the stretch means and the flexible stretch mold are relatively displaced to form the long material along the flexible stretch mold.

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