JPH0919721A - Press device for bending shapes - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely bend even a large shapes of a hard steel without generating wrinkles and defects up to the tail end. SOLUTION: A device for pressing an angle steel is provided with a 1st restricting means to restrict the movement of lateral direction of one side C1 of the angle steel C by clamping it between the internal side face 4b of the vertical direction of a die 4 and the face 6a of a holding plate 6 attached along the external side face 4d of the vertical direction of the die, the deformation of lateral direction of the other side C2 by clamping it between the internal side face 4b of the die and the holding plate 6a through a punch 1. Further, it is provided with a 2nd restricting means to restrict the movement of up and down direction of the other side C2 of the angle steel by clamping it between the internal side curved face 4a of the die and the curved face 3a of the holding plate 3 attached along the external side face 1b of the vertical direction of the punch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a press machine for bending a section steel, and more particularly to a press machine for bending a large chevron or channel steel made of a hard material such as austenitic stainless steel. It is a thing.

[0002]

2. Description of the Related Art A typical three-dimensional bending device for a shaped steel is a three-roll bending device, which employs a feed bending method in which the shaped steel is sequentially fed from one end to three rotating rolls.

[0003]

By the way, there is the following problem when a profile made of a hard material such as austenitic stainless steel is bent by the three roll bending apparatus. First of all, about 400 mm of both ends of the shape in the longitudinal direction are out of the roll, so a predetermined bending radius cannot be obtained, and about 15% of the length of about 5 to 6 m is waste material, which is expensive stainless steel. In some cases, it will be a large economic loss. Secondly, particularly in the case of inward bending, wavy wrinkles are generated on the side to be compressed, and so-called "galling" flaws are generated due to contact with the roll. Such a phenomenon is remarkable especially in the case of a large size, for example, an angle steel having a size of 70 × 70 × 8 (mm) or more, and the internal bending is very difficult. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a press device capable of accurately bending a large-sized shaped steel made of a hard material without causing wrinkles or flaws to the ends.

[0004]

The pressing device of the present invention comprises:
Bending is performed while giving a strong restraining force to the shaped steel from the vertical and lateral directions.
A punch (or a male die) which comprises either an upper die movable up and down by a predetermined stroke or a lower die fixed to a base and which has a lateral cylindrical outer curved surface having a first radius. )
And a die (or a female die) that constitutes the other die and has a lateral cylindrical inner curved surface having a second radius (or a female die), and when the upper die is lowered to the lowest position of the stroke, A press device for forming a gap between the punch and the die, which has the same shape as the shape of the angle steel to be bent when the bending work is completed. One side, which is the purpose of bending the steel, is located in the space between the two lateral curved surfaces, and the other side is a longitudinal inner surface that is perpendicular to this surface at one end of the lateral curved surface of the die. , The angle steel is charged so that it is located in a gap between one end of the lateral curved surface of the punch and a vertical outer surface that is perpendicular to this surface, and the upper die is lowered to the lowest position. To bend the angle steel along the curved surfaces. In the device, the lateral movement of the one side of the chevron is performed along the longitudinal inner surface of the die and the longitudinal outer surface located at the other end of the lateral curved surface of the die. It is sandwiched between the attached first holding member and the corresponding surface of the first holding member, and the lateral deformation of the other side of the chevron is prevented by the inner surface of the die in the vertical direction and the first holding member. A first restraining means for restraining by sandwiching the punch with a surface, and the vertical movement of the other side of the chevron, the lateral curved inner surface of the die and the punch. A second restraint means for restraining the second restraint member, which is mounted along the outer side surface in the vertical direction, by sandwiching the second restraint member with the corresponding surface.

In this apparatus, the lateral curved surface of the punch can be convex and the lateral curved surface of the die can be concave, and conversely, the punch can be concave and the die can be convex. Further, the first holding member can be removably fixed to the outer side surface of the die in the vertical direction, and the second holding member can be removably fixed to the outer side surface of the punch in the vertical direction.

For the channel steel, a horizontal cylinder having a third radius, which constitutes either one of an upper die movable up and down by a predetermined stroke and a lower die fixed to a base. A punch having an outer curved surface and a die having a lateral cylindrical inner curved surface having a fourth radius and forming the other die, when the upper die is lowered to the bottom of the stroke In the press device, which is formed between the punch and the die to form a void equal to the shape of the grooved steel to be bent when the bending is completed, in a state where the upper die is raised. , One side forming a groove bottom, which is the purpose of bending of the channel steel, is located in a gap between the lateral curved surfaces, and one of two sides forming a groove wall is the die A longitudinal inner surface that is perpendicular to this surface at one end of the lateral curved surface; Is located in the gap between one end of the lateral curved surface of the punch and one outer surface in the vertical direction that is perpendicular to this surface, and the other side that constitutes the groove wall is in the lateral direction of the punch. A third restraint member attached along the other outer side surface in the vertical direction which is perpendicular to this surface at the other end of the curved surface and the outer side surface in the vertical direction located at the other end of the lateral curved surface of the die. A press device for charging the channel steel so as to be positioned in a space between the corresponding surfaces and bending the channel steel along the curved surfaces by lowering the upper die to the lowest position. In which the lateral movement of the one side forming the groove bottom of the channel steel is sandwiched between the longitudinal inner surface of the die and the surface of the third restraining member, and The lateral deformation of the two sides forming the groove wall of the shaped steel is changed to the inner surface of the die in the longitudinal direction and the first side. The third restraint means for restraining each of the restraint members by sandwiching them with the surface via the punch, and the vertical movement of the two sides constituting the groove wall of the channel steel. A fourth restraining by sandwiching between the lateral inner curved surface of the die and the corresponding surfaces of the fourth and fifth restraining members mounted along the respective outer lateral surfaces of the punch in the longitudinal direction. And a fifth restraint means.

Also in this apparatus, the lateral curved surface of the punch can be convex and the lateral curved surface of the die can be concave, or conversely, the punch can be concave and the die can be convex. . Further, the third restraining member can be detachably fixed to the outer side surface of the die in the longitudinal direction, and the fourth and fifth restraining members can be detachably fixed to the outer side surface of the punch in the longitudinal direction. be able to.

[0008]

As is apparent from the structure of the pressing device of the present invention, when the angle steel is processed, one side of the bending target inserted in the space between the punch and the die is Predetermined by the lower surface of the punch having the first radius and the upper surface of the die having the second radius, or by the upper surface of the punch having the first radius and the lower surface of the die having the second radius. Bent to a radius of. At this time, both the lateral movement of the one side and the lateral deformation of the other side are restrained by the first restraining means, and the vertical movement of the other side is restrained by the second restraining means. To be done.
As a result, even large, large chevron steel can be easily and precisely bent to the end, reducing the generation of waste material, and even in the case of inward bending, wavy wrinkles or "galling" on the side of the compressed side. It is possible to prevent the occurrence of defects. In this device, if the punch is convex and the die is concave,
It is for internal bending, and if the punch is concave and the die is convex, it is for external bending.

Also in the processing of the channel steel, one side forming the groove bottom for the purpose of bending inserted in the gap between the punch and the die is restricted by the lower surface of the punch and the upper surface of the die, or It is bent to a predetermined radius by being restricted by the upper surface of the punch and the lower surface of the die. At this time, the lateral movement of the one side and the lateral deformation of the two sides forming the groove wall are both restrained by the third restraining means, and the two sides constituting the groove wall move in the vertical direction. Are respectively restrained by the fourth and fifth restraining means. Therefore, an effect similar to that of the angle steel is obtained. Also in this apparatus, if the punch is convex and the die is concave, it is for internal bending, and if the punch is concave and the die is convex, it is for external bending.

[0010]

DETAILED DESCRIPTION OF THE INVENTION Referring to FIGS.
A press device for inward bending of equilateral angle steel will be described. This press device is composed of an upper mold A that is vertically movable by a predetermined stroke by a driving unit (not shown), and a lower mold B that is similarly fixed to a base (not shown), and is formed between the upper and lower molds. The angle steel profile C is loaded into the void and is pressed from above to be internally bent so that the profile has a desired radius.

The upper mold A comprises a punch 1, a mounting plate 2 to which the punch 1 is fixed, and a vertical restraining plate 3 acting as a second restraining member. The lower surface 1a of the punch 1 has a predetermined bending radius. It is a cylindrical convex curved surface which curves in the front-back direction of the surface of FIG. The bending radius in this case is a value adjusted to a desired bending radius in consideration of the springback of the shape after pressing. Further, the lower surface 3a of the pressing plate 3 is obtained by subtracting the radius of the lower surface 1a of the punch 1 from the radius of the lower surface 1a of the chevron steel C, that is, the value obtained by subtracting the wall thickness of the other side C1 from the outer width of the side C2. It is a cylindrical convex curved surface that curves in the front-back direction of the surface of FIG. 1 with the radius subtracted.

The lower mold B is composed of a die 4, a mounting plate 5 to which the die 4 is fixed, and a lateral restraining plate 6 acting as a first restraining member. The upper surface 4a of the die 4 has a bending radius of 1a. It is a cylindrical concave curved surface having a radius added with the wall thickness of the side C1 of the angle steel C to be bent into a curved shape and curved in the front-back direction of the surface of FIG.

When the upper die A is lowered to the lowest position of the stroke, the lower surface 1a of the punch 1 and the longitudinal outer surface 1b which is perpendicular to this surface, the upper surface 4a of the die 4 and one end of this surface. A void that matches the shape of the angle steel C when the bending work is completed is formed between the inner surface 4b and the right angle surface 4b. That is, in FIG. 1, the lateral width of the surface 4a of the die 4 is substantially equal to the outer width of the side C1 of the angle steel C to be processed. Further, the height of the surface 4b of the die in the cross section of FIG. 1 is substantially equal to the width outside the side C2 of the angle steel. The upper surface 4c which is perpendicular to the surface 4b of the die is the lower surface 3 of the pressing plate 3.
It is a cylindrical concave curved surface that curves in the front-back direction of the surface of FIG. 1 with a radius the same as a. The lateral width of the lower surface 1a of the punch 1 is substantially equal to the inner width of the side C1 of the angle steel. Further, the distance between the lower surface 1a of the punch 1 and the upper surface 4a of the die 4 and the distance between the outer surface 1b of the punch 1 and the inner surface 4b of the die 4 are respectively the corresponding sides C1 and C2 of the angle steel.
Is almost equal to the thickness of.

When the angle steel is to be bent by this apparatus, the upper mold A and the lower mold B are raised with the upper mold A being raised.
After the profile C is inserted into the space between the two from one end in the longitudinal direction, the upper mold A is lowered and pressed. Next, upper mold A
And move the profile by an appropriate length. In this manner, by repeating both the steps of pressing and moving for feeding from one end to the other end of the shape member, the inner bending process of one shape member is completed.

In this case, the side C1 of the angle steel C is bent in the front-back direction of FIG. 1, but its deformation is the lower surface 1a of the punch 1.
And the upper surface 4a of the die 4 are used for regulation. The lateral movement of the side C1 caused by the deformation of the shape member is restricted by sandwiching the side C1 in the width direction between the vertical surface 4b of the die 4 and the surface 6a of the lateral restraining plate 6. To be done. The holding plate 6 is detachably fixed by bolts 7 along a vertical outer surface 4d located on the other end side of the lateral inner surface 4a of the die 4. The side C2 of the angle iron is compressed by internal bending, so that lateral deformation and wrinkling occur. This deformation or wrinkle is restrained by sandwiching the side C2 in the thickness direction via the punch 1 between the vertical surface 4b of the die 4 and the surface 6a of the pressing plate 6. (The above is the first restraint means) Further, the side C2 of the angle steel may move in the vertical direction as well, but this is the upper surface 4a of the die 4,
The side C2 is constrained by sandwiching the side C2 in the width direction with the surface 3a of the vertical pressing plate 3 which is detachably fixed by the bolt 8 along the vertical surface 1b of the punch 1. (Second restraint means) The lateral restraint plate 6 and the vertical restraint plate 3 are detachably fixed to the die 4 and the punch 1, respectively. This is because there is an error in the width of the side C1 of the angle steel. In this case, insert an adjustment plate of appropriate thickness between the die 4 and
Further, when there is an error in the width of the side C2, the suppressing plate 3 can be adjusted by adjusting its position in the vertical direction.

As is clear from the above description,
According to the device of the present invention, in the internal bending, the lateral movement of the side C1 of the angle steel C to be bent is caused by the die surface 4b and the restraining plate 6, and the deformation of the side C2 is also made through the punch 1. Due to the face 4b of the die and the holding plate 6, the vertical movement of the side C2 causes the face 4a of the die and the corresponding face 3a of the holding plate.
Strongly bound by. Therefore, even a large chevron steel of hard austenitic stainless steel can be easily bent to the end portion, reduce the generation of waste material, and prevent the generation of corrugated wrinkles or "bite" flaws on the side surface of the compressed side C2. be able to. Furthermore, according to this device, since bending can be performed more accurately than before, it is possible to punch a long shape member at a desired position in advance and then bend it, which is advantageous in working. is there.

[0017]

Example: An austenitic stainless steel SUS304 chevron steel 100 x 100 x 10 (mm) and a length of 1500 mm were used with a bending radius of 15
The results of inward bending with this device at 00 mm are shown below. In this case, the radius of the lower surface 1a of the punch 1 is set to 1290 m in consideration of the springback of the shape after bending.
The radius of the upper surface 4a of the die 4 was 1300 mm. 8 profiles
It was pressed and bent in 9 times, and then subjected to normal straightening. As a result, the quality of the product was as follows, and a product which was remarkably good as compared with the conventional three-roll bending process was obtained.

Bending radius accuracy: 1500mm ± 2mm or less Cutting at both ends: If bending radius accuracy is ± 2mm or less, cutting at both ends is unnecessary and no waste material is generated Squareness: ± 2 ° or less Flatness: Unevenness of 0.5mm or less Surface skin: No scoring flaws Waviness: No waviness The above explanation was made for equilateral angle steel, but in the case of unequal angle angular steel and unequal side unequal thick angle steel, the shape of the punch 1 and the die 4 is also used. If you change it, you can deal with it. Also,
As described above, as shown in FIGS. 2 and 3, since the punch surface 1a is convex and the die surface 4a is concave, the description will be made on the apparatus for inward bending, but as shown in FIGS. ,
If the surface 1a 'of the punch is concave and the surface 4a' of the die is convex, the device for outward bending is obtained. In this case, the pressing plate 3
The lower surface 3a 'of the punch 1 has a radius obtained by adding the radius of the lower surface 1a' of the punch 1 to the inner width of the side C2 of the angle steel C, that is, the value obtained by subtracting the wall thickness of the side C1 from the outer width of the side C2. It is a cylindrical concave curved surface that is curved in the front-back direction of the first surface. The upper end surface 4c 'of the die is a cylindrical convex curved surface that curves in the front-back direction of the surface of FIG. 1 with a radius of the same dimension as the lower surface 3a' of the pressing plate 3. Also in this case, as in the case of inward bending, a strong restraining force is applied to the shaped steel during bending, so that the quality of the product is significantly improved as compared with the conventional apparatus. Further, if necessary, contrary to the above, the upper die may be a die and the lower die may be a punch.

FIG. 6 shows a bending press for channel steel. This device is in principle the same as the device for angle steel. However, the grooved steel profile C ′ has two sides C′2 and C ′ that form a groove wall on both sides of one side C′1 that forms the groove bottom.
Since there are three, especially the restraint means needs to consider this. That is, the lower die B'is the die 40 and the mounting plate 5
0 and a lateral restraint plate 60. The restraint plate 60 is one side C′3 that constitutes the groove wall of the channel steel from the outer surface of the die 40.
Extends upwards along. This restrains the lateral movement of the side C′1 forming the groove bottom of the grooved steel during bending, and forms the grooved wall of the grooved steel via the punch 10.
It also acts to restrain the lateral deformation of the sides C′2 and C′3. (Third Restraining Means) The upper mold A ′ is composed of the punch 10, the mounting plate 20, and the vertical restraining plates 30 and 31, and the two restraining plates are sides C′2 that form the groove wall of the channel steel. , C′3 have the action of restraining the vertical movement of the respective components. (Fourth and Fifth Restraining Means) Other configurations, operations, and effects are the same as those of the device for the angle steel, and thus description thereof will be omitted.

Similar to the device for angle steel, if the punch is a convex type and the die is a concave type, it becomes a device for internal bending,
If the punch has a concave shape and the die has a convex shape, a device for outward bending can be obtained. Furthermore, if necessary, the upper die is a die,
The lower mold can also be used as a punch.

[Brief description of the drawings]

FIG. 1 is a line I1-I of FIG. 2 showing a state in which an angle steel is charged into a bending press apparatus of the present invention for the angle steel and bent.
1 is a schematic longitudinal sectional view taken along line I2-I2 of FIG. 1 and FIG. 3, or line I3-I3 of FIG. 4 and line I4-I4 of FIG. 5;

FIG. 2 is a schematic left side view of the upper mold when the device shown in FIG. 1 is used for an internal bending press.

FIG. 3 is a schematic right side view of a lower mold corresponding to FIG.

FIG. 4 is a schematic left side view of the upper mold when the device shown in FIG. 1 is used for an external bending press.

5 is a schematic right side view of a lower mold corresponding to FIG. 4. FIG.

FIG. 6 is a schematic vertical cross-sectional view similar to FIG. 1, showing a state in which channel steel is loaded into a bending press device of the present invention for channel steel and bent.

[Explanation of symbols]

A, A '... upper mold, B, B' ... lower mold, C ... chevron steel section,
C '... Channel-shaped steel profile, 1, 10 ... Punch, 4, 40 ... Die, 3, 6, 30, 31, 60 ... Suppression plate.

Claims (14)

[Claims] 1. A lateral cylindrical outer curved surface having a first radius, which constitutes either one of an upper die movable up and down by a predetermined stroke and a lower die fixed to a base. A punch and a die having a lateral cylindrical inner curved surface having a second radius and forming the other die, the punch and the die when the upper die is lowered to the bottom of the stroke. A press device configured to form a void equal to the shape at the time of bending work of the angle steel to be bent between the die and the die, in a state where the upper die is raised, One side which is the object is located in the gap between the two lateral curved surfaces, and the other side is a vertical inner surface that is perpendicular to this surface at one end of the lateral curved surface of the die, and the punch. One of the lateral curved surfaces has a vertical outer surface that is perpendicular to this surface. A press device for charging the chevron steel so as to be positioned in a gap between the chevron and the side surface, and lowering the upper die to the lowest position to bend the chevron steel along the curved surfaces. A first restraint for lateral movement of the one side of the steel attached along the inner surface in the longitudinal direction of the die and the outer surface in the longitudinal direction located at the other end of the lateral curved surface of the die. It is sandwiched between the corresponding faces of the member and the lateral deformation of the other side of the angle steel is caused between the inner surface of the die in the longitudinal direction and the face of the first restraining member. First restraint means for restraining by sandwiching via a punch, and vertical movement of the other side of the chevron, the lateral curved inner surface of the die and the outer lateral surface of the punch in the vertical direction. Clamped between the corresponding faces of the second restraining members mounted along the The angle iron, characterized in that it comprises a second constraining means for constraining the Rukoto bending press. 2. The angle steel bending press apparatus according to claim 1, wherein the lateral curved surface of the punch is a convex shape, and the lateral curved surface of the die is a concave shape. . 3. The surface of the second restraining member corresponding to the edge of the other side of the chevron steel subtracts the inner width of the other side of the chevron steel from the first radius of the punch. The angle-steel bending press apparatus according to claim 2, wherein the curved surface is a convex curved surface having a radius equal to the above value. 4. The angle steel bending press apparatus according to claim 1, wherein the lateral curved surface of the punch is concave and the lateral curved surface of the die is convex. . 5. The surface of the second restraint member corresponding to the edge of the other side of the chevron steel has a width within the other side of the chevron steel added to the first radius of the punch. The bending press device for angle steel according to claim 4, which is a concave curved surface having a radius equal to the above value. 6. The angle steel according to claim 1, wherein the first holding member is detachably fixed to the outer side surface of the die in the longitudinal direction. Bending press equipment. 7. The angle steel according to claim 1, wherein the second holding member is detachably fixed to the outer side surface of the punch in the longitudinal direction. Bending press equipment. 8. A lateral cylindrical outer curved surface having a third radius, which constitutes either one of an upper die movable up and down by a predetermined stroke and a lower die fixed to a base. A punch and a die having a lateral cylindrical inner curved surface having a fourth radius and forming the other die, the punch and the die when the upper die is lowered to the bottom of the stroke. A pressing device configured to form a void between the die and a grooved steel to be bent when the bending is completed. One side forming the groove bottom, which is the purpose of bending, is located in the space between the two lateral curved surfaces, and one of the two sides forming the groove wall is one end of the lateral curved surface of the die. And the inner surface in the vertical direction that is perpendicular to this surface,
One end of the lateral curved surface of the punch is located in a gap between the one lateral outer surface perpendicular to this surface and the other side forming the groove wall is the lateral direction of the punch. Third restraining member attached along the other outer side surface in the vertical direction which is perpendicular to this surface at the other end of the curved surface of the above and the outer side surface in the vertical direction located at the other end of the lateral curved surface of the die. Charging the channel steel so that it is located in the gap between the corresponding surface of
In a press device for bending the grooved steel along the curved surfaces by lowering the upper die to the lowest position, the lateral movement of the one side forming the groove bottom of the grooved steel,
Lateral deformation of the two sides sandwiching between the inner surface of the die in the vertical direction and the surface of the third restraining member and forming the groove wall of the channel steel is performed by the deformation of the die. Third restraint means for restraining by sandwiching between the inner side surface in the vertical direction and the surface of the third restraining member via the punches, and the groove wall of the channel steel. A fourth movement in which the two sides are vertically moved is attached along the inner curved surface in the lateral direction of the die and the outer surface in the longitudinal direction of the punch.
And a fourth and fifth restraining means for restraining each of them by sandwiching them with the corresponding surface of the fifth restraining member, respectively. 9. The channel steel bending press according to claim 8, wherein the lateral curved surface of the punch is a convex shape, and the lateral curved surface of the die is a concave shape. apparatus. 10. The surfaces of the fourth and fifth restraining members corresponding to the side edges of the two sides forming the groove wall of the channel steel are respectively from the third radius of the punch to the groove. The bending press device for channel steel according to claim 9, which is a convex curved surface having a radius equal to a value obtained by subtracting an inner width of the two sides of the shape steel. 11. The channel steel bending press according to claim 8, wherein the lateral curved surface of the punch has a concave shape, and the lateral curved surface of the die has a convex shape. apparatus. 12. The surfaces of the fourth and fifth restraining members corresponding to the side ends of the two sides forming the groove wall of the channel steel are respectively formed in the groove at the third radius of the punch. The channel-forming bending apparatus according to claim 11, which is a concave curved surface having a radius equal to a value obtained by adding the inner widths of the two sides of the shaped steel. 13. The groove shape according to claim 8, wherein the third holding member is detachably fixed to the outer side surface in the longitudinal direction of the die. Steel bending press equipment. 14. The fourth and fifth restraining members are detachably fixed to the respective outer side surfaces of the punch in the longitudinal direction thereof. Bending press apparatus for channel steel according to.