JPH10118715A - Press bending machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press bending machine capable of bending with a first bending blade and a second bending blade and a third binding blade at one stroke of an upper die. SOLUTION: The first binding blade 5 and the third binding blade 6 are provided in the upper die 2 of the press bending machine 1 and the second bending blade 8 is held with a lower die 3 so as to slide, a blank 100 pressed to a first die 9 with a pad 4 is bent with the first bending blade 5 and the second bending 8 and the third bending blade 6 at one stroke by descending of the upper die 2. First, the side plate of the blank 100 is bent with the first bending blade 5. Next, the tongue piece extending from the side plate of the blank 100 is bent toward the blank 100 side with the second bending blade 8 via a pressing member 7 provided in the upper die 2. Finally, the opposing plate of the blank 100 is bent with the third bending blade 6 so as to superpose on the tongue piece. At this time, the end part of the opposing plate of the blank 100 is bent into a flange.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a first bending blade and a second bending blade.
The present invention relates to a press bending forming machine capable of performing bending by a bending blade and a third bending blade with one stroke of an upper die.

[0002]

2. Description of the Related Art Conventionally, a blank 1 made of sheet metal shown in FIG.
In order to bend 00 into a panel product as shown in FIG. 8, three bending steps described below are performed. First, in the first bending step, the side plate 101 of the blank material 100 is bent along the planned bending line Q as indicated by an arrow A in FIG. Next, in the second bending step, FIG.
As shown by the arrow B, the tongue piece 102 extending from the bent side plate 101 is bent along the planned bending line S toward the blank material 100 side. Finally, in the third bending step, as shown by the arrow C in FIG. 11, the facing plate 10 of the blank material 100 is overlapped with the bent tongue piece 102.
3 along the predetermined bending line R and FIG.
As shown by the arrow D of FIG.
Is bent along the predetermined bending line T to form a flange.

[0003] The first bending step, the second bending step, and the third bending step are separately performed by different press bending molding machines dedicated to each step, or a bending blade dedicated to each step. (Hereinafter referred to as a "multi-step bending method") using a single press bending molding machine having an upper die. Also, as a method different from the “multi-step bending method”, a blank material (not shown) having a shape different from the blank material 100 shown in FIG. There is also a method of punching out a portion corresponding to (1) and raising a portion corresponding to the flange (hereinafter, referred to as “drawing method”).

[0004]

However, in the "multi-step bending method", it is necessary to repeat the work of placing the blank material 100 bent in each step on a press bending forming machine and removing it. Yes, and it is necessary to temporarily store the blank material 100 bent in each step,
There is a problem that the burden on the operator is large. In addition, there is a problem that the processing accuracy varies with the repetition of the work of mounting and removing the press bending machine.

Further, in the "drawing method", it is necessary to adjust the amount of deformation of the draw using a draw bead. Therefore, there is a problem that the setting of the draw bead causes variation in working accuracy and lowers the yield. there were. further,
Since a vertical line is formed at the boundary between the four-sided bent part and the four-sided cylindrical part in the drawn square cylindrical container, spatter is generated when welding the part corresponding to the flange. There were also problems.

[0006] In order to solve such a problem, if there is a press bending machine capable of performing all the steps of the "multi-step bending method" with one stroke of the upper die, the "multi-step bending processing" will be described. It is no longer necessary to repeat the work of placing the blank material 100 bent in each step on the press bending forming machine and removing the blank material 100 in each step as in "method", and once storing the blank material 100 bent in each step. Further, unlike the "drawing method", a draw bead is not used, and a vertical line is not formed, which is very effective.

As described above, the press bending machine capable of performing the entire process of bending the blank material with one stroke of the upper die is disclosed in, for example, Japanese Patent Application Laid-Open No. 5-23761. There is one that uses a molding die. However, such a molding die for a flange can mold a central flange connected to a central wall portion of a blank material and a lateral flange connected to a side wall portion in one stroke by the same die, and bend while overlapping. It is not suitable for bending the panel product as shown in FIG.

Accordingly, the present invention has been made to solve the above-described problems, and has been made in consideration of the first bending step, the second bending step, and the third bending step of the "multi-step bending method". To
An object of the present invention is to provide a press bending molding machine that can perform an upper mold with one stroke.

[0009]

According to a first aspect of the present invention, there is provided a press bending and forming machine for bending a side plate of a blank material, the first bending blade comprising: A second bent blade for bending a tongue extending from the side plate bent by the blade toward the blank material side, and a direction of the blank material so as to overlap the tongue bent by the second bent blade. A third bending blade for bending a plate, wherein the first bending blade, the second bending blade, and the third bending blade form a bend;
It is performed in two strokes. The press bending forming machine according to claim 2 is the press bending forming machine according to claim 1, wherein the third bending blade simultaneously flanges a front end portion of the facing plate of the blank material. It is characterized by being formed by bending.

A third aspect of the present invention is the press bending machine according to the first aspect, wherein the first bending blade and the third bending blade are provided on the upper die. And the second bending blade is slidably held by the lower die, and when the upper die is lowered with respect to the lower die, the pressing member provided on the upper die is moved to the second die. By pressing a bending blade and sliding the second bending blade toward the blank material side, the tongue piece is bent by the second bending blade.

In the press bending forming machine of the present invention having such a configuration, the first bending step of the "multi-step bending method" is performed by the first bending blade, and the second bending step is performed by the second bending step. By performing the third bending step with the third bending blade with the bending blade, the first bending step, the second bending step, and the third bending step of the “multi-step bending processing method” are performed by the upper die. In one stroke. Therefore, as in the "multi-step bending method", the work of placing and removing the blank material bent in each step on a press bending forming machine is repeated, or the blank material bent in each step is temporarily removed. Since it is not necessary to keep the storage, the burden on the worker can be reduced and the yield can be improved.

Further, unlike the "drawing method", a draw bead is not used or a vertical line is not formed, so that the yield is improved and the generation of spatter at the time of welding is prevented. can do. further,
Since the three steps of the first bending step, the second bending step, and the third bending step of the “multi-step bending processing method” are one step, the working efficiency can be improved.

The bending by the second bending blade is performed by the first bending blade.
After bending the side plate of the blank material with the bending blade, the tongue extending from the side plate is bent, and further, the third bending blade is overlapped with the tongue bent by the second bending blade. Therefore, it is necessary to secure the timing between the bending by the second bending blade and the bending by the first and third bending blades. In the press bending molding machine according to the present invention, the second bending blade is slidably held by the lower die, and the upper die provided with the first bending blade and the third bending blade is positioned with respect to the lower die. When descending, the bending by the second bending blade is performed via the pressing member provided on the upper mold,
The timing of the bending by the second bending blade and the timing of the bending by the first bending blade and the third bending blade can be secured.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. First, an outline of a press bending forming machine according to an embodiment of the present invention will be described with reference to FIG. The press bending molding machine 1 shown in FIG. 2 is a sheet metal blank material 100 (having a thickness of about 1 mm) shown in FIG. 7 in one stroke (stroke length 300 mm) in which the upper mold 2 descends with respect to the lower mold 3. ) Is bent into the panel product of FIG.

As shown in FIG. 2, a first soybean 9 is provided at the center of the lower die 3 of the press bending and forming machine 1. First
The soybean 9 mounts the blank material 100 of FIG. Also, the upper surface of the first soybean 9 has a blank material 100
Bending line Q (see FIG. 7) of the side plate 101 of FIG.
3 has the same shape as a rectangle having four sides as the four scheduled bending lines R (see FIG. 7).
Blank material 100 so that the four sides of soybean 9 coincide with each other.
Is placed on the upper surface of the first soybean 9. Accordingly, in the blank material 100 of FIG. 2, portions protruding from both left and right sides (hereinafter, simply referred to as “both sides”) of the first soybean 9 are the side plates 101 (including the tongue pieces 102), and are located before the first soybean 9. On the side and the opposite side, the facing plate 103 of the blank material 100
(Including the tip portion 104) is protruding. The positioning when placing the blank material 100 on the upper surface of the first soybean 9 is performed using the notch P (FIG. 7) of the blank material 100. Further, the planned bending line R of the blank material 100 is set to be located outside the planned bending line S by the thickness Z of the blank material 100 outside.

A second soybean 10 is provided on the side opposite to the front side of the first soybean 9. Further, a second bent blade 8 is slidably held on both sides of the second soybean 10. The second bending blade 8 is for bending the tongue piece 102 extending from the side plate 101 along the planned bending line S toward the blank material 100 as indicated by an arrow B in FIG. In addition, the sliding direction of the second bending blade 8 is a horizontal direction in FIG. 2, and is a direction that intersects with the planned bending line Q of the side plate 101 of the blank material 100 placed on the upper surface of the first soybean 9. .

The sliding of the second bending blade 8 is performed by the pressing member 7 described later, and is performed toward the center of the press bending and forming machine 1. When the sliding is completed, the surface of the second bending blade 8 on the center side of the press bending forming machine 1 is moved to the first bending blade.
Although it is located on the center side of the press bending machine 1 from both side surfaces of the soybean 9, it does not come into contact with both side surfaces of the first soybean 9 and the second soybean 10 (see FIGS. 1, 5 and 6). ). In addition, a through hole 12 for the pressing member 7 described below is provided below the second bending blade 8. Therefore, the second bent blade 8 and the through hole 12 are provided outside the four corners of the first soybean 9, respectively.

On the upper side of the lower die 3 of the press bending molding machine 1, an upper die 2 which can move up and down with respect to the lower die 3.
Is provided. The upper die 2 includes a pad 4 and a first
A bending blade 5, a third bending blade 6, a pressing member 7, and the like are provided. The pad 4 presses the blank material 100 placed on the upper surface of the soybean 6, and can move up and down with respect to the upper die 2 via the driving member 11. The first bending blade 5 is provided on both sides of the pad 4 and bends the side plate 101 of the blank material 100 along the planned bending line Q as indicated by an arrow A in FIG. It is. The length of the first bending blade 5 (in the direction perpendicular to the plane of the drawing) is equal to or shorter than the side of the upper surface of the first soybean 9 on which the expected bending line Q overlaps. Even when the upper die 2 is lowered, it does not interfere with the second bent blade 8 (see FIGS. 1, 4, 5, and 6). At the same time, the first bent blade 5 does not interfere with the first soybean 9 (see FIGS. 1, 4, 5, and 6).

The third bent blade 6 is provided on the side opposite to the front side of the pad 4 and has a tongue piece 102 bent by the second bent blade 8 as shown by an arrow C in FIG. The facing plate 103 of the blank material 100 is bent along the predetermined bending line R so that the facing plate 103 overlaps the leading edge portion 104 of the facing material 103 of the blank material 100 as indicated by an arrow D in FIG. Is formed along the bending line T to form a flange. Further, since the length of the third folding blade 6 (in the horizontal direction with respect to the plane of the drawing) is equal to or shorter than the length of the second soybean 10, even if the upper die 2 descends. There is no interference with the second bending blade 8 (FIG. 1,
See FIG. 6). At the same time, the third bent blade 6 does not interfere with the first soybean 9 (see FIGS. 1 and 6).

The pressing member 7 is provided on the side opposite to the front side of the first folding blade 5. Therefore, the pressing member 7
Are provided outside the four corners of the pad 4, respectively.
When the upper die 2 is lowered with respect to the lower die 3, the pressing member 7 comes into contact with and presses the second bent blade 8 (see FIGS. 4 and 5), and is inserted into the through hole 12. (See FIGS. 1, 5, and 6). That is, the sliding distance of the second bent blade 8 can be adjusted by the pressing member 7.

Next, in the press bending forming machine 1 having the above-described structure, the procedure for bending the sheet metal blank material 100 shown in FIG. 7 into the panel product shown in FIG. 8 will be described with reference to FIGS. It will be described with reference to FIG. First, as shown in FIG. 2, the upper die 2 is raised to the upper limit position, and the blank material 100 is placed on the upper surface of the first soybean 9. Next, as shown in FIG. 3, the pad 4 is lowered via the driving member 11 so that the blank material 100 placed on the upper surface of the first soybean 9 is removed.
Hold down.

Next, as shown in FIG.
With respect to the first folding blade 5 provided on the upper mold 2.
Then, the side plate 101 protruding from both sides of the first soybean 9 is bent. As described above, the bending line Q of the side plate 101
Coincides with the side of the upper surface of the first soybean 9, and therefore, as shown by the arrow A in FIG.
Can be bent along the expected bending line Q. Such bending forming corresponds to the first bending step of the “multi-step bending processing method”. At this time, the tongue piece 102 extending from the bent side plate 101 protrudes from the front side and the opposite side of the first soybean 9 while overlapping the planned bending line S with the four sides formed by the respective side surfaces of the first soybean 9. I have. Further, the pressing member 7 provided on the upper die 2 comes into contact with the second folding blade 8 provided on the lower die 3 and starts pressing.

Next, as shown in FIG.
Is further lowered, the pressing member 7 provided on the upper mold 2 presses the second bending blade 8 provided on the lower mold 3,
The second bending blade 8 is slid toward the center of the press bending machine 1. Then, the first bent blade 8 is slid,
Tongue piece 1 protruding from the near side and opposite side of soybean 9
02, as shown by the arrow B in FIG.
Fold along the planned bending line S toward the 0 side. As described above, the bending line S of the tongue piece 102 is the first soybean 9
10 coincides with the four sides formed by the side surfaces of the blank 100, as shown by the arrow B in FIG.
Can be bent along the planned bending line S. Such bending is equivalent to the second bending step of the “multi-step bending method”. At this time, the side plate 101 of the blank material 100
Is sandwiched between the first bent blade 5 and the side surface of the first die 9, so that the first bent blade 5 functions as a pad in bending. Further, the pressing member 7 starts to be inserted into the through hole 12.

Next, as shown in FIG.
Is further lowered with respect to the third die provided on the upper die 2.
The folding plate 6 bends the facing plate 103 protruding from the front side and the opposite side of the first soybean 9. As described above, since the planned bending line R of the facing plate 103 matches the side of the upper surface of the first soybean 9, the facing plate 103 of the blank material 100 is folded as indicated by the arrow C in FIG. It is possible to bend along the planned bending line R. At this time, the facing plate 103 is
And the front end portion 104 of the facing plate 103 abuts on the upper surface of the second soybean 10. The bending up to this point corresponds to the third bending step of the “multi-step bending method”.

Next, as shown in FIG.
Is further lowered with respect to the third die provided on the upper die 2.
A facing plate 103 is provided between the folding blade 6 and the upper surface of the second soybean 10.
Is pinched. At this time, the tip 10
4 is overlapped with the side formed by the side surface of the first die 9 and the upper surface of the second die 10, and as shown by the arrow D in FIG. The portion 104 can be bent along the predetermined bending line T to form a flange.

As described above in detail, in the press bending forming machine 1 of the present embodiment, the first bending step of the "multi-step bending method" is performed by the first bending blade 5 and the second bending step. By performing the bending step with the second bending blade 8 and the third bending step with the third bending blade 6, the first bending step, the second bending step, and the second bending step of the “multi-step bending method” are performed. The three bending steps can be performed with one stroke of the upper mold 2. Therefore, as in the “multi-step bending method”, the work of mounting and removing the blank material 100 bent in each step on the press bending forming machine 1 is repeated,
Since it is no longer necessary to temporarily store the blank material 100 bent in each step, the burden on the operator can be reduced.

Further, unlike the "drawing method", a draw bead is not used or a vertical line is not formed, so that the yield is improved and the generation of spatter at the time of welding is prevented. can do. further,
Since the three steps of the first bending step, the second bending step, and the third bending step of the “multi-step bending processing method” are one step, the working efficiency can be improved.

In the bending by the second bending blade 8, the side plate 101 of the blank 100 is bent by the first bending blade 5, and then the tongue piece 102 extending from the side plate 101 is bent. And the tongue piece 10 bent by the second bending blade 8
2 so that the blank material 100 is overlapped with the third bent blade 6
Since the facing plate 103 is bent, it is necessary to secure the timing between the bending by the second bending blade 8 and the bending by the first bending blade 5 and the third bending blade 6. In the press bending forming machine 1 of the present embodiment, the second bending blade 8 is slidably held by the lower die 3, and the first bending blade 5 and the third bending blade 6 are provided. When the upper mold 2 descends with respect to the lower mold 3, the second bending blade 8 is pressed via the pressing member 7 provided on the upper mold 2.
, The timing between the bending by the second bending blade 8 and the bending by the first bending blade 5 and the third bending blade 6 can be secured.

The bending of the tongue piece 102 is performed at the four corners of the blank material 100, and the bending of the facing plate 103 is performed on both sides (the front side and the opposite side in FIGS. 1 to 6) of the blank material 100. `` Multi-step bending method ''
Forming the blank material 100 into the box shape shown in FIG.

It should be noted that the present invention is not limited to the above embodiment, and various changes can be made without departing from the gist of the present invention. For example, by using a segment that adjusts the height of the upper surface of the soybean 10, a bent product having different heights, flange positions, and the like can be bent by the press bending machine 1 of the above embodiment. Can be.

Further, as shown in FIG.
The tongue piece 102 can also be formed by bending the tongue piece 102 at the predetermined bending line S ′ having an angle θ.

[0032]

According to the press bending forming machine of the present invention, the first bending step, the second bending step, and the third bending step of the "multi-step bending method" are performed.
The bending step can be performed in one stroke of the upper mold. Therefore, as in the "multi-step bending method", the work of placing and removing the blank material bent in each step on a press bending forming machine is repeated, or the blank material bent in each step is temporarily removed. Since there is no need to store the information, the burden on the operator can be reduced. Further, unlike the "drawing method", a draw bead is not used or a vertical line is not formed, so that the yield can be improved and the generation of spatter at the time of welding can be prevented. . Furthermore, since the three steps of the first bending step, the second bending step, and the third bending step of the “multi-step bending processing method” become one step, the working efficiency can be improved.

Further, the second bending blade is slidably held by the lower die, and when the upper die provided with the first bending blade and the third bending blade descends with respect to the lower die. Since the bending by the second bending blade is performed via the pressing member provided on the upper die, the bending by the second bending blade and the bending by the first bending blade and the third bending blade. It is possible to secure timing for forming the music.

Further, by bending the tongue pieces at the four corners of the blank material and bending the facing plate on both sides of the blank material, the blank material can be formed by the procedure of "multi-step bending method". Forming in a box shape can be performed with one stroke of the upper mold.

[Brief description of the drawings]

FIG. 1 is a front view of a press bending molding machine when one stroke of an upper die is completed.

FIG. 2 is a front view of the press bending forming machine when a blank is placed on a first die.

FIG. 3 is a front view of the press bending molding machine when a blank material is pressed by a pad.

FIG. 4 is a front view of the press bending forming machine when a side plate of a blank material is bent by a first bending blade.

FIG. 5 is a front view of the press bending forming machine when a tongue piece of a blank side plate is bent by a second bending blade.

FIG. 6 is a front view of the press bending forming machine when a facing plate of a blank material is bent by a third bending blade.

FIG. 7 is a development view of a blank material.

FIG. 8 is a diagram illustrating a state in which bending of the blank material has been completed.

FIG. 9 is a diagram showing a state where a side plate of a blank material is bent.

FIG. 10 is a diagram showing a state where a tongue piece of a side plate of a blank material is bent.

FIG. 11 is a view showing a state in which when a facing plate of a blank material is bent, a front end portion of the facing plate is bent and formed into a flange.

FIG. 12 is a diagram illustrating a state in which bending of a blank material has been completed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Press bending molding machine 2 Upper die 3 Lower die 5 1st bending blade 6 3rd bending blade 7 Pressing member 8 2nd bending blade 100 Blank material 101 Blank material side plate 102 Blank material side plate tongue piece 103 Blank material facing plate 104 Tip of blank material facing plate

Claims (3)

[Claims] 1. A first bending blade for bending a side plate of a blank material, and a second bending blade for bending a tongue piece extending from the side plate bent by the first bending blade toward the blank material side. And a third bent blade for bending a facing plate of the blank material so as to overlap the tongue piece bent by the second bent blade, wherein the first bent blade and the second bent blade are provided. A press bending forming machine, wherein bending by a blade and the third bending blade is performed by one stroke of an upper die. 2. The press bending machine according to claim 1, wherein the third bending blade simultaneously bends the front end portion of the facing plate of the blank material into a flange. Bending molding machine. 3. The press bending molding machine according to claim 1, wherein the first bending blade and the third bending blade are provided on the upper die, and the second bending blade is slid to a lower die. When the upper die is lowered relative to the lower die, a pressing member provided on the upper die presses the second bent blade, and the second bent blade is A press bending forming machine, wherein the tongue piece is bent by the second bending blade by sliding toward the blank material side.