JP2002178041A - Support block for bending - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support block for bending with which a work can be surely bent into an intended shape without using any auxiliary block which is fitted to the work in a conventional practice. SOLUTION: In bending the work P comprising a longitudinal piece part 11, a first transverse piece part 12 provided orthogonal thereto, and a second transverse piece part 13 provided orthogonal to the longitudinal piece part 11 at the position away from the first transverse piece part 12 by a predetermined distance, a recessed part 21 for locating at least a part of the work P is provided in the support block used to apply the force to the work, and in the recessed part 21, a stepped part 22 touching the lower side of the second transverse piece part 13 is formed in a condition that the work is positioned and the lower side of the first transverse piece part 12 is brought into contact with the peripheral edge surface of an opening 21a of the recessed part 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique used for, for example, bending an aircraft structural material (workpiece). More specifically, the present invention relates to a bending support block used to abut on a workpiece and apply a force (bending load) to the workpiece so as to cause the workpiece to bend and deform.

[0002]

The wing frame of an aircraft has a structure in which a number of ribs are arranged substantially parallel to each other along the longitudinal direction. Further, the rib is constituted by attaching a long material having a substantially F-shaped cross section called an F code to each of upper and lower edges of a web as a main portion thereof.

[0003] By the way, the F code is, as is well known,
It is manufactured through a process of bending and deforming an extruded material of an aluminum alloy so as to have a predetermined curvature by a stretch molding machine. That is, the aluminum extruded material that was initially in a straight state as shown in FIG. 8A (hereinafter, referred to as a workpiece).
Is bent by a bending process using a stretch molding machine as shown in FIG. Then, a predetermined cutting process is performed on this, and an F code to be attached to the web is completed.

Heretofore, such bending of a workpiece has been performed by a method in which a molding die is pressed from below under a state where a tensile force is applied to the workpiece. However, this method has the following problems. Many final molded products obtained by bending are required to have slightly different curvatures from each other. Therefore, the same mold cannot be used repeatedly, and in principle, the same number of molds as the number of final molded products must be prepared. In the past, this has required enormous costs.

However, in recent years, a stretch molding jig (Japanese Patent Application No. 10-290202) which can solve such problems at a high level and is extremely useful has been developed. The jig is capable of freely changing the curvature of the molding surface thereof. Therefore, if there is one jig, a final molded product of any shape can be obtained.
In other words, if this jig is used, it is not necessary to prepare a large number of molding dies corresponding to each of the final molded products having slightly different degrees of curvature, and the cost can be significantly reduced.

However, it has recently been found that the above-mentioned stretch molding jig still needs improvement. The points that require this improvement are as follows.

The above-mentioned stretch forming jig which plays a role of a forming die has a plurality of support blocks (supporting blocks for bending) arranged in a row, which are in direct contact with the workpiece. Each of these support blocks can be independently displaced in the vertical direction, and can be fixed at a desired position. An imaginary curved surface formed by connecting the upper surfaces of the support blocks is the molding surface, that is, the support blocks jointly constitute a molding surface of the workpiece.

FIG. 9A shows a state in which a workpiece is set on the support block. In the drawing, a groove 92 is formed in a support block denoted by reference numeral 91, and a part of the vertical piece 93 a of the workpiece 93 is accommodated in the groove 92. On the other hand, the left half of the first horizontal piece 93b orthogonal to the upper end of the vertical piece 93a is in contact with the upper end surface (receiving surface) of the support block 91. Furthermore, the second horizontal piece 93c provided in the middle of the vertical piece 93a is located at a position lower than the receiving surface with which the first horizontal piece 93b contacts.
The support block 91 is in contact with another receiving surface. In addition, a flexible structure in which rectangular parallelepiped unit blocks, generally called "filler chains", are connected in a row by wires so that a force (bending load) is effectively transmitted to the right half of the first horizontal piece 93b. Of the auxiliary block 94 of the first
Between the horizontal piece 93b and the second horizontal piece 93c.

During the molding operation, the auxiliary block 94 is supported by a back plate 95 fixed to an elevating shaft (not shown) to form a first horizontal piece 93b and a second horizontal piece 93c.
It is regulated so as not to get out of between. In addition, the support block 91 is connected to the upper end of the elevating shaft, and is capable of swinging (swinging about an axis parallel to the first horizontal piece 93b) within a certain angle range.

Now, the workpiece 93 on which the auxiliary block 94 has been fitted as described above is set above the stretch molding jig whose molding surface has been adjusted, and the jig, and therefore all the support blocks 91, are set. Let's say you raise it at the same time. That is, when the forming (bending) operation is started, the workpiece 93 and all the support blocks 91 are finally connected to each other as shown in FIG.
The positional relationship shown in FIG. That is, the forming surface of the stretch forming jig completely matches the degree of curvature of the workpiece 93, and the bending of the workpiece 93 is completed.

However, sometimes, a trouble as shown in FIG. 9B occurs. That is, while the support block 91 is being lifted, the auxiliary block 94 is relatively easily inclined. This is because a design is made so that a gap that cannot be ignored is formed between the workpiece 93 and the auxiliary block 94 in order to easily attach and detach the auxiliary block 94. On the contrary, when the auxiliary block 94 is tilted, the first horizontal piece 9 which has been mounted on the auxiliary block 94 until then is tilted.
The right half of 3b loses its support, and the horizontal piece 93b is bent from the center. Also, the vertical piece 93a may be bent near the base of the second horizontal piece 93c. The work material that has undergone such unintended deformation naturally has a reduced molding dimensional accuracy, and depending on the degree, becomes a defective product. In the above stretch molding jig,
Immediate improvements in these respects were strongly sought.

Apart from this, the auxiliary block 9
The use of No. 4 has the following problems. As described above, the auxiliary block 94 is obtained by connecting a large number of metal blocks. Therefore, the weight is very large, and the handling thereof, for example, the work of fitting into or removing from the workpiece 93 involves considerable difficulty. Furthermore, when the bending is completed, even if the deformation of the workpiece 93 is as intended, the first horizontal piece 93b and the second
The auxiliary block 94 is firmly engaged with the horizontal piece 93c. Therefore, the auxiliary block 9 which is no longer required due to a negative synergistic effect with the fact that it is heavy is unnecessary.
Removal work of 4 is extremely difficult.

Accordingly, an object of the present invention is to provide a bending support block capable of reliably bending a workpiece into an intended shape. In particular, an object of the present invention is to provide a bending support block capable of reliably bending a workpiece into an intended shape without using an auxiliary block to be fitted to the workpiece.

[0014]

The object of the present invention is to provide a vertical piece,
The first piece provided on the vertical piece so as to be orthogonal to the vertical piece.
And a second horizontal piece provided on the vertical piece at a position separated from the first horizontal piece by a predetermined distance so as to be orthogonal to the vertical piece. When bending the material, it is a support block used to apply a force to the workpiece, comprising a recess for positioning at least a portion of the workpiece, within the recess, In a state where the workpiece is positioned in the concave portion and the lower surface of the first horizontal portion is in contact with the peripheral surface of the opening of the concave portion, the workpiece is in contact with the lower surface of the second horizontal portion. The problem is solved by a bending support block characterized in that a step is formed.

[0015] In particular, the above-described problems are caused by a vertical piece, a first horizontal piece provided on the vertical piece so as to be orthogonal to the upper end of the vertical piece, and a first horizontal piece provided by the first horizontal piece. When bending a workpiece having a second horizontal piece provided on one surface side of the vertical piece so as to be orthogonal to the vertical piece at a position separated by a distance, the workpiece A support block used to apply a force to the vertical piece of the workpiece and a second block.
A concave portion for accommodating the horizontal piece portion, wherein the vertical piece portion and the second horizontal piece portion are stored in the concave portion, and the peripheral surface of the opening of the concave portion is provided in the concave portion. In the state where the lower surface of the first horizontal piece is in contact with the lower surface of the second horizontal piece, a step is formed to be in contact with the lower surface of the second horizontal piece. .

[0016] Alternatively, the above-mentioned problem is caused by a vertical piece, a first horizontal piece provided on the vertical piece so as to be orthogonal to an upper end of the vertical piece, and a predetermined horizontal piece from the first horizontal piece. A second horizontal piece provided on one surface side of the vertical piece so as to be orthogonal to the vertical piece at a position separated by a distance, and facing the second horizontal piece with the vertical piece interposed therebetween When bending a workpiece having a third horizontal piece provided on the other surface side of the vertical piece so as to be orthogonal to the vertical piece, a force is applied to the workpiece. A supporting block used to add a vertical piece, a second horizontal piece and a third horizontal piece of the workpiece, a recess for accommodating the same, in the recess, The vertical piece, the second horizontal piece, and the third horizontal piece are housed in the concave portion, and the lower portion of the first horizontal piece is provided on the peripheral surface of the opening of the concave portion. In the abutted against state, the first stepped portion and the third abutting against the lower surface of the second lateral piece
The bending step is characterized in that a second step portion is formed to be in contact with the lower surface of the horizontal piece portion.

As the material to be processed, a material in which the vertical piece and the first horizontal piece are substantially T-shaped is often used. Therefore, in order to apply a force uniformly to such a workpiece, the bending support block sandwiches the vertical piece portion of the first horizontal piece portion on the peripheral surface of the opening of the concave portion. It is preferable that both lower surfaces are configured to be in contact with each other.

On the contrary, the above-mentioned problems are caused by a vertical piece,
The first piece provided on the vertical piece so as to be orthogonal to the vertical piece.
When bending a workpiece having a horizontal piece and a second horizontal piece provided on the vertical piece so as to be orthogonal to the lower end of the vertical piece, force is applied to the workpiece. A support block used to add a, comprising a recess for positioning at least a part of the workpiece, on the bottom surface of the recess, the workpiece is located in the recess, and Wherein the lower surface of the second horizontal piece contacts the lower surface of the first horizontal piece in contact with the peripheral surface of the opening of the concave portion. Solved by support blocks.

It is preferable that an inner surface of the concave portion of the bending support block on the opening side is a tapered surface that expands toward the opening surface (outside). This is to facilitate the setting of the workpiece. That is, when the tapered surface is provided as described above, it functions as a so-called guide surface when the second horizontal piece (and the third horizontal piece) is housed in the recess. Therefore, in a state where the installation of the workpiece has been completed, even if it is designed that there is almost no gap between the end surface of the second horizontal piece and the inner surface of the concave portion,
The workpiece can be smoothly set in the recess.

When the bending support block has the above-mentioned structure, that is, in the same block, the vertical piece portion and the second horizontal piece portion (and the third horizontal piece portion) of the workpiece are stored. When a concave portion is provided, and a step portion is provided in the concave portion where the lower surface of the second horizontal piece portion (and the third horizontal piece portion) is in contact (the lower surface of the second horizontal piece portion contacts the bottom surface of the concave portion). The same applies to the case where they are configured to be in contact with each other), and the conventional problem is solved as follows.

That is, when the bending support block according to the present invention is used, the material to be processed, particularly the first and second horizontal pieces (and the third horizontal piece), It is reliably supported by the peripheral surface (receiving surface) of the recess opening and the upper surface of the step (or the bottom surface of the recess). Therefore, the auxiliary block which has been indispensable so far becomes unnecessary, and various problems caused by using the auxiliary block together are eliminated. Specifically, during the raising of the support block, the first horizontal piece of the workpiece loses support and bends from the center,
Or, the trouble that the vertical piece is bent from the middle does not occur. Therefore, there are no problems such as a decrease in the dimensional accuracy of the final molded product and the occurrence of defective products.

Further, the use of the bending support block according to the present invention relieves the user from handling an extremely heavy auxiliary block. Further, it is not necessary to perform an extremely difficult operation of removing the auxiliary block, which is firmly engaged between the upper and lower horizontal pieces, from the workpiece. Therefore, the labor required for bending the workpiece is significantly reduced. Generally speaking, the use of the bending support block of the present invention makes it possible to reliably bend a workpiece into an intended shape. In particular, even if the auxiliary block is not used, such a special effect can be obtained. In addition, since the auxiliary block is not required, the problem of reduced workability caused by its use can be solved.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be specifically described with reference to FIGS. FIG. 1 is an overall schematic view of a stretch forming machine to which a support block for bending according to the present embodiment is mounted, FIG. 2 is a perspective view of the support block for bending, and FIG. 3 is a state in which a workpiece is set. FIG. 3 is a side view of the bending support block.

Before describing the bending support block according to this embodiment, first, the structure and function of a stretch forming machine to which the support block is attached will be briefly described with reference to FIG.

FIG. 1 is a structural element of an aircraft, for example.
This shows a state in which a workpiece such as an F code is being bent to have a predetermined curvature. As can be seen from the figure, the stretch forming machine includes a pair of stretch portions 1a and 1b serving to grip both ends of the workpiece P and apply a tensile force thereto, and an upward force (bending) on the workpiece P. And a press part 2 for applying a load) to bend and deform the main part.

The press section 2 has a stretch molding jig 3. The stretch molding jig 3 fixed to the rigid die table 4 is configured so that the shape (curvature) of its molding surface can be freely changed. That is, the stretch forming jig 3 is provided with a plurality of shafts (elevation shafts) 5 that are arranged in a line along the longitudinal direction of the workpiece P and can protrude upward, and swings on the upper end of each of the shafts 5. And a plurality of support blocks (= bending support blocks according to the present embodiment) 6 which are capable of being detachably connected. The curved surface virtually connecting the upper surface of the support block 6 is the molding surface.

Therefore, the above-mentioned stretch molding jig 3
As described above, the curvature of the molding surface can be set to various values by appropriately changing the position (projection amount) of the support block 6 individually. Therefore, if one stretch molding jig 3 is provided, it is possible to obtain a final molded product of any shape.

When bending the workpiece P, the workpiece P is disposed between the stretch portion 1a and the stretch portion 1b. Then, with a tensile force acting on it,
What is necessary is just to operate the press part 2, and to make the stretch molding jig 3 whose molding surface is adjusted project upward. In this way, the workpiece P is curved and deformed so as to conform to the molding surface of the stretch molding jig 3, and becomes a final molded product having a predetermined curvature. The first embodiment of the present invention, which will be described in detail below, relates to the structure of the support block (hereinafter, referred to as the present support block) 6.

The support block 6 is used for applying a force (bending load) to the workpiece P having a cross-section of an inverted "upper" shape. First, the workpiece P will be described in detail. The workpiece P to be supported by the main support block 6 includes a vertical piece 11 and a first horizontal piece 12 provided integrally with the vertical piece 11 so as to be orthogonal to the upper end thereof. A second horizontal piece 13 is provided at a position away from the first horizontal piece 12 by a predetermined distance, and is integrally provided on one surface thereof so as to be orthogonal to the vertical piece 11 (FIG. 3). In particular, the vertical piece 11 and the first horizontal piece 12 are substantially T-shaped.

The main support block 6 used to apply a force to the workpiece P when bending the workpiece P has a rectangular parallelepiped outer shape as can be seen from FIG. More specifically,
This is obtained by forming a concave portion 21 for locating at least a part of the workpiece P, in particular, the vertical piece 11 and the second horizontal piece 13 in a rectangular parallelepiped metal lump. In other words, the support block 6 has a substantially U-shaped section with an irregular cross section. Therefore, the opening 21a of the concave portion 21
Both lower surfaces of the first horizontal piece 12 sandwiching the vertical piece 11 are in contact with the peripheral surface of the first horizontal piece 12.

A step 22 is formed in the recess 21. The step 22 accommodates the workpiece P (the vertical piece 11 and the second horizontal piece 13) in the recess 21, and
In a state where both lower surfaces of the first horizontal piece portion 12 are in contact with the peripheral surface of the one opening 21a, the lower surface of the second horizontal piece portion 13 is abutted. That is, the distance between the peripheral surface (receiving surface) of the opening 21 a of the recess 21 and the upper surface of the step 22 is determined by the distance between the lower surface of the first horizontal piece 12 and the lower surface of the second horizontal piece 13. equal.

In addition, in the present embodiment, the inner surface of the recess 21 on the opening side is a tapered surface that expands toward the opening surface, in other words, toward the outside. In particular, the inner surface on the tapered opening side (indicated by 23 in the figure)
Is a surface on the side intersecting with the tip of the second horizontal piece 13.
That is, the inner surface of the concave portion on this side may come into contact with the end of the second horizontal piece 13, but if it is tapered, the surface guides the end of the second horizontal piece 13. It plays a guiding role, and as a result, the setting of the workpiece P can be performed extremely smoothly.

Although not particularly shown, a joint portion used for connection with the shaft 5 is provided on the bottom surface side of the main support block 6. By being connected via this joint portion, the main support block 6 is swingable with respect to the shaft 5 and is detachable.

In the case where the bending support block 6 according to the present embodiment having the above-described structure is used, the workpiece P is made to have an opening 21a in the concave portion 21 in particular, and the first horizontal piece 12 is formed by the opening 21a. , And the second horizontal piece 13 is securely supported on the upper surface of the step 22. Therefore, the auxiliary block, which has been indispensable in the past, becomes unnecessary, and various conventional problems caused by using the auxiliary block are solved. Specifically, while the support block 6 is being raised, a trouble occurs in which the first horizontal piece 12 of the workpiece P loses support and is bent from the center, or the vertical piece 11 is bent from the middle. Absent. Therefore, there is no problem such as a decrease in dimensional accuracy of the final molded product or a defective product due to such an unexpected deformation.

The use of the support block 6 also frees the user from handling an extremely heavy auxiliary block. Further, the extremely difficult work which has been required so far, that is, the removal of the auxiliary block, which is firmly engaged between the upper and lower horizontal pieces, from the workpiece is not required. As a result, the labor required for the bending operation of the workpiece P is significantly reduced. By using the main support block 6 in this manner, the workpiece P can be reliably bent into the intended shape without using an auxiliary block. In addition, the problem of reduced workability caused by the use of the auxiliary block is solved.

Next, a second embodiment of the present invention will be specifically described with reference to FIGS. Here, FIG. 4 is a perspective view of the bending support block according to the present embodiment, and FIG. 5 is a side view of the bending support block in a state where a workpiece is set. In addition, also about the support block for bending which concerns on this embodiment, the basic technical idea, the effect which it produces, and further a usage form (outline of bending work).
Are basically the same as those of the first embodiment. Therefore, the following description focuses on the differences from the first embodiment.

The bending support block according to the second embodiment (hereinafter referred to as the main support block again) applies a force (bending load) to a workpiece having an inverted "soil" cross section. What is used. First, the work material will be described in more detail.

The workpiece to be supported by the support block includes a vertical piece 31 and a vertical piece 3 perpendicular to the upper end thereof.
1 and a first horizontal piece 32 provided integrally with the first horizontal piece 32.
Further, the work material is provided at a position separated by a predetermined distance from the first horizontal piece portion 32 so as to be integral with the vertical piece portion 31 so as to be orthogonal to the vertical piece portion 31 and on one surface side thereof. The second horizontal piece 33 sandwiches the horizontal piece 33 and the vertical piece 31.
And a third horizontal piece 34 provided integrally with the vertical piece 31 so as to be orthogonal to the vertical piece 31 and on the other surface side (see FIG. 5). In particular, the vertical piece 31
The first horizontal piece 32 has a substantially T-shape.

Now, as shown in FIG. 4, the support block used to apply a force when bending the workpiece having the above structure also has a rectangular parallelepiped outer shape similar to that described above. Have. That is, the support block is formed by adding a part of the work material, in particular, the vertical piece 3 to a rectangular parallelepiped metal block.
This is obtained by forming a concave portion 41 for positioning the first and second horizontal pieces 33 and 34. Therefore, the support block also has a substantially U-shaped cross section. In addition, both lower surfaces of the first horizontal piece 32 sandwiching the vertical piece 31 are in contact with the peripheral surface of the opening 41 a of the recess 41.

In the recess 41, a first step 42 and a second step 43 are formed. The first step 4
Reference numeral 2 denotes a housing for accommodating workpieces (vertical piece 31, second horizontal piece 33, and third horizontal piece 34) in the recess 41, and a peripheral surface (receiving surface) of the opening 41a of the recess 41. In a state where both lower surfaces of the first horizontal piece 32 are in contact with each other, the lower surface of the second horizontal piece 33 is brought into contact. That is,
The distance between the peripheral surface of the opening 41a of the concave portion 41 and the upper surface of the first step portion 42 is equal to the lower surface of the first horizontal portion 32 and the second horizontal portion 3
3 equal to the distance between the lower surface.

On the other hand, the second step portion 43 also has
In the state where the work material is stored in the inside and the lower surfaces of both of the first horizontal piece portions 32 are in contact with the peripheral surface (receiving surface) of the opening 41a of the concave portion 41, the third horizontal piece portion is formed. The lower surface 34 is in contact with the lower surface. That is, the opening 4 of the concave portion 41
1a and the upper surface of the second step portion 43 are equal to the first distance.
Is equal to the distance between the lower surface of the horizontal piece 32 and the lower surface of the third horizontal piece 34.

In addition, in the present embodiment, the inner surface on the opening side of the concave portion 41 is a tapered surface that expands toward the opening surface, in other words, toward the outside. In particular, the tapered surfaces are both inner surfaces on the opening side opposed to each other. And, needless to say, this tapered inner surface (indicated by 44 in the figure) serves to guide the end of the second horizontal piece 33 and the end of the third horizontal piece 34, and As a result, the setting of the workpiece can be performed extremely smoothly.

When the support block for bending according to the present embodiment having such a structure is used, the work material is
In particular, the first horizontal portion 32 is the peripheral surface of the opening 41a of the concave portion 41, the second horizontal portion 33 is the upper surface of the first step portion 42, and the third horizontal portion 34 is the second horizontal portion 34. Is securely supported on the upper surface of the step portion 43. Therefore, similarly to the first embodiment, the auxiliary block which has been indispensable so far becomes unnecessary, and the trouble caused by using the auxiliary block together is solved.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be specifically described with reference to (a side view of the bending support block according to the present embodiment in a state where a workpiece is set). Regarding the support block for bending according to the present embodiment, the basic technical concept, the effects achieved by the support, and the usage form (outline of the bending work) are described below.
This is almost the same as the first embodiment. Therefore, the description of the present embodiment will also focus on the differences from the first embodiment.

The support block for bending according to the third embodiment (hereinafter referred to as the present support block) is used to apply a force to a workpiece having a substantially F-shaped cross section (F-section workpiece). What is used. The workpiece is formed by a vertical piece 51
And a first horizontal piece 52 provided integrally with the vertical piece 51 so as to be orthogonal to the upper end thereof, and a vertical piece at a predetermined distance from the first horizontal piece 52. A second horizontal piece 53 provided integrally with the first horizontal piece 52 (below the first horizontal piece 52) so as to be orthogonal to the first portion 51 and on one side thereof (below the first horizontal piece 52).
And made from. In particular, the vertical piece 51 and the first horizontal piece 5
2 is substantially L-shaped.

When the workpiece is bent, the supporting block used to apply a force to the workpiece is also formed into a rectangular parallelepiped metal block by at least a part of the workpiece, in particular, the vertical piece 51, This is obtained by forming a concave portion 61 for positioning the second horizontal piece portion 53. A part of the lower surface of the first horizontal piece 52 is in contact with the peripheral surface (receiving surface) of the opening 61 a of the concave portion 61.

A step 62 is formed in the recess 61. The stepped portion 62 has a work piece (vertical piece 5
The first and second horizontal pieces 53) are housed, and
When the lower surface of the first horizontal piece 52 is in contact with the peripheral surface of the opening 61a, the lower surface of the second horizontal piece 53 is in contact with the entire lower surface. That is, the opening 61 of the concave portion 61
The distance between the peripheral surface of “a” and the upper surface of the step 62 is equal to the distance between the lower surface of the first horizontal portion 52 and the lower surface of the second horizontal portion 53. Further, in the present embodiment, the inner surface on the opening side of the concave portion 61 (indicated by 63 in the drawing) is a tapered surface that expands toward the opening surface.

Subsequently, regarding a fourth embodiment of the present invention,
A specific description will be made with reference to FIG. 7 (a side view of the bending support block according to the present embodiment in a state where a workpiece is set). However, the bending support block according to the present embodiment is also substantially the same as the first embodiment in terms of the basic technical concept, the effects exerted by the same, and the usage pattern (outline of the bending operation). Therefore, the differences from the first embodiment will be mainly described here.

The supporting block for bending according to the fourth embodiment (hereinafter referred to as the present supporting block) is used for applying a force to a workpiece having a substantially U-shaped cross section when bending the workpiece. It is something that can be done. More specifically, the workpiece comprises a vertical piece 71, a first horizontal piece 72 provided integrally with the vertical piece 71 so as to be orthogonal to the upper end thereof, and a vertical piece 71. And a second horizontal piece 73 provided integrally with the lower end of the second cross piece so as to be orthogonal to the lower end.

When the workpiece is bent, the supporting block used to apply a force to the workpiece is also formed into a rectangular parallelepiped metal block by at least a part of the workpiece, in particular, the vertical piece 71 and the second piece. This is obtained by forming a concave portion 81 for positioning the horizontal piece 73 of FIG. In particular, a part of the lower surface of the first horizontal piece 72 is in contact with the peripheral surface (receiving surface) of the opening 81 a of the concave portion 81.

Further, the main support block accommodates the workpiece (vertical piece 71 and second horizontal piece 73) therein, and has the first horizontal piece on the peripheral surface of the opening 81 a of the recess 81. Part 7
The bottom surface 8 of the concave portion 81 in a state where the lower surface of
2 is configured such that the entire lower surface of the second horizontal piece 73 abuts. That is, the distance between the peripheral surface of the opening 81 a of the recess 81 and the bottom surface 82 is equal to the distance between the lower surface of the first horizontal piece 72 and the lower surface of the second horizontal piece 73. In addition, in the present embodiment, the inner surface on the opening side of the concave portion 81 (indicated by 83 in the figure)
Is a tapered surface that expands toward the opening surface.

In the first to fourth embodiments, the cross-sections have an inverted "upper" shape, the inverted "soil" -shaped cross sections, and substantially F
The support block used when bending a U-shaped one and a substantially U-shaped one has been described. However, the present invention can be implemented with appropriate modifications within the scope of the technical concept. For example, the workpiece to be supported by the bending support block of the present invention may have at least a vertical piece and two horizontal pieces orthogonal to the vertical piece, and the shape thereof is as described above. The invention is not limited to those exemplified in the embodiment. Therefore, the concave shape of the support block is not limited to that of the above embodiment.

[0053]

According to the bending support block of the present invention, the workpiece can be surely bent to the intended shape. In particular, it is possible to reliably bend a workpiece into an intended shape without using an auxiliary block to be fitted to the workpiece.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of a stretch forming machine to which a support block for bending according to a first embodiment of the present invention is attached.

FIG. 2 is a perspective view of a bending support block according to the first embodiment of the present invention.

FIG. 3 shows a first embodiment of the present invention in a state where a workpiece is set.
Side view of a bending support block according to an embodiment

FIG. 4 is a perspective view of a bending support block according to a second embodiment of the present invention.

FIG. 5 shows a second embodiment of the present invention in a state where a workpiece is set.
Side view of a bending support block according to an embodiment

FIG. 6 shows a third embodiment of the present invention in a state where a workpiece is set.
Side view of a bending support block according to an embodiment

FIG. 7 shows a fourth embodiment of the present invention in which a workpiece is set.
Side view of a bending support block according to an embodiment

8A is a perspective view of a workpiece in a straight state, and FIG. 8B is a perspective view of the workpiece in a curved state.

9A is a side view showing a state in which a workpiece is set on a support block, and FIG. 9B is a side view showing a state in which a problem occurs in the workpiece.

[Explanation of symbols]

P Work material 1a, 1b Stretch part of stretch forming machine 2 Press part of stretch forming machine 3 Stretch forming jig 4 Die table 5 Stretch forming jig shaft (elevating shaft) 6 Bending work support block 11 Vertical piece 12 First horizontal piece 13 of the workpiece 13 Second horizontal piece 21 of the workpiece 21 Depression of the support block for bending 21a Opening of the recess 22 Step in the recess 23 Tapered surface (tapered surface) (Opening inner surface of the concave part)

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Toshio Yanase 3175 Showa-cho, Kanazawa-ku, Yokohama-shi, Kanagawa Prefecture Inside Japan Aircraft Co., Ltd. (72) Inventor Hisayuki Morikawa 3175 Showa-cho, Kanazawa-ku, Yokohama-shi, Kanagawa Japan Aircraft Co., Ltd. F term (reference) 4E063 AA01 BC13 CA12 FA07 JA07 MA30

Claims (6)

[Claims] 1. A vertical piece, a first horizontal piece provided on the vertical piece so as to be orthogonal to the vertical piece, and a position separated by a predetermined distance from the first horizontal piece, A support block used to apply a force to the workpiece when bending a workpiece having a second horizontal piece provided on the vertical piece so as to be orthogonal to the vertical piece. A concave portion for locating at least a part of the workpiece, wherein the workpiece is located in the concave portion, and the peripheral surface of an opening of the concave portion is provided in the concave portion. A supporting block for bending, wherein a step is formed to abut on the lower surface of the second horizontal piece when the lower surface of the first horizontal piece is abutted. 2. A vertical piece, a first horizontal piece provided on the vertical piece so as to be orthogonal to an upper end of the vertical piece, and a first horizontal piece provided on the vertical piece.
When bending a workpiece having a second horizontal piece provided on one surface side of the vertical piece so as to be orthogonal to the vertical piece at a position separated from the horizontal piece by a predetermined distance. A support block used to apply a force to the workpiece, comprising a recess for accommodating a vertical piece and a second horizontal piece of the workpiece; The vertical section and the second horizontal section are housed in the recess, and the lower surface of the first horizontal section is brought into contact with the peripheral surface of the opening of the recess. 2. A bending support block, characterized in that a stepped portion is formed in contact with the lower surface of the horizontal piece of (2). 3. A vertical piece, a first horizontal piece provided on the vertical piece so as to be orthogonal to an upper end of the vertical piece, and a first horizontal piece provided on the vertical piece.
At a predetermined distance from the horizontal piece, a second horizontal piece provided on one surface side of the vertical piece so as to be orthogonal to the vertical piece, and the second horizontal piece sandwiching the vertical piece. When bending a workpiece having a third horizontal piece provided on the other surface side of the vertical piece so as to be orthogonal to the vertical piece at a position facing the horizontal piece, A support block used to apply a force to the workpiece, comprising a recess for accommodating a vertical piece, a second horizontal piece, and a third horizontal piece of the workpiece, The vertical portion, the second horizontal portion, and the third horizontal portion are housed in the concave portion, and the first horizontal portion is provided on a peripheral surface of an opening of the concave portion. In the state where the lower surface of the part is in contact,
A support block for bending, wherein a first step portion abutting on the lower surface of the second horizontal piece portion and a second step portion abutting on the lower surface of the third horizontal piece portion are formed. . 4. The workpiece has a vertical piece portion and a first horizontal piece portion having a substantially T-shape, and a peripheral surface of an opening of the concave portion has the first horizontal piece portion. The bending support block according to any one of claims 1 to 3, wherein both lower surfaces sandwiching the vertical piece portion are configured to be in contact with each other. 5. A vertical piece, a first horizontal piece provided on the vertical piece so as to be orthogonal to the vertical piece, and a vertical piece provided on the vertical piece so as to be orthogonal to a lower end of the vertical piece. A support block used to apply a force to the workpiece when bending the workpiece having the second horizontal piece portion, wherein at least a part of the workpiece is positioned. A concave portion for causing the workpiece to be located in the concave portion on the bottom surface of the concave portion, and the lower surface of the first horizontal piece portion abutted on the peripheral surface of the opening of the concave portion. A supporting block for bending, wherein a lower surface of the second horizontal piece is abutted in a state. 6. An opening-side inner surface of the concave portion is a tapered surface that expands toward the opening surface.
A support block for bending according to claim 5.