WO2000040348A1 - Dispositif de pliage de feuille metallique - Google Patents

Dispositif de pliage de feuille metallique Download PDF

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Publication number
WO2000040348A1
WO2000040348A1 PCT/JP1999/006702 JP9906702W WO0040348A1 WO 2000040348 A1 WO2000040348 A1 WO 2000040348A1 JP 9906702 W JP9906702 W JP 9906702W WO 0040348 A1 WO0040348 A1 WO 0040348A1
Authority
WO
WIPO (PCT)
Prior art keywords
metal plate
die
rod
shaped
metal
Prior art date
Application number
PCT/JP1999/006702
Other languages
English (en)
Japanese (ja)
Inventor
Takaaki Maeda
Original Assignee
Yuugenkaisha Taigaa Koosan
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP10373221A external-priority patent/JP2000197918A/ja
Priority claimed from JP11049047A external-priority patent/JP2000246340A/ja
Priority claimed from JP11049048A external-priority patent/JP2000246341A/ja
Application filed by Yuugenkaisha Taigaa Koosan filed Critical Yuugenkaisha Taigaa Koosan
Priority to EP99973573A priority Critical patent/EP1066893A4/fr
Publication of WO2000040348A1 publication Critical patent/WO2000040348A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor
    • B21D5/0263—Die with two oscillating halves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209—Tools therefor

Definitions

  • the present invention relates to a metal sheet bending apparatus using a special mold, which is characterized in that a rotation suppressing device is additionally provided, and a metal sheet bending vendor (press brake), hydraulic press, pneumatic It is used as a press or a mechanical press.
  • a metal sheet bending vendor press brake
  • hydraulic press pneumatic It is used as a press or a mechanical press.
  • a flat plate-shaped lower die with a groove and a punch-shaped upper die are used, and the metal plate is placed on the flat-shaped lower die groove.
  • the metal plate was bent by pressing the metal plate into the groove of the lower die with the upper die.
  • the pressing force of the upper mold is applied to the flat lower mold groove surface via the metal plate.
  • the metal plate surface and the lower mold groove surface rub against each other due to excessive pressing force with no escape area due to the vertical direction. There were drawbacks that impaired the appearance.
  • the pressing force of the upper die is concentrated on the metal plate surface linearly with the flat lower groove as the fulcrum, and the physical structure of the metal plate is damaged and degraded, and the metal plate is bent. There were defects such as cracks and a decrease in physical strength. Especially when the radius of the shoulder of the mold at the time of bending was small, this defect was remarkable.
  • the present invention does not require the use of dozens of plate-shaped lower dies having different sizes and shapes according to the thickness and the degree of bending of the metal plate to be bent, as in the case of a conventional flat plate-shaped lower die.
  • the present invention reduces the pressing force of the upper die by half in bending the metal plate with the die, and releases the pressing force of the upper die applied to the groove surface of the lower die through the metal plate, thereby reducing the metal plate surface.
  • the metal plate surface that occurs when the lower mold groove surface rubs The purpose is to eliminate scratches and improve the appearance and appearance of folded metal sheet products.
  • the present invention eliminates the damage and deterioration of the physical structure of the metal plate by receiving and dispersing the pressing force of the upper die over the entire metal contact surface of the two lower rod-shaped lower dies,
  • the purpose is to prevent the occurrence of bending cracks (cracks) in the sheet and to maintain the physical strength of the metal sheet.
  • the present invention reduces the impact of the upper mold pressing force (stroke) by enabling the metal plate to be bent without reaching the bottom dead center of the upper mold stroke. Reduces the degree of friction between the lower mold groove surface and the metal plate surface due to the upper mold pressing force, eliminating scratches and damage to the lower mold groove surface and preventing lower mold groove wear and wear.
  • the purpose is to do.
  • Still another object of the present invention is to prevent the metal plate from coming off even when the metal plate is bent at an end portion or when the bending dimension is short, and to beautifully bend the metal plate to improve the bending accuracy.
  • the present invention uses a pair or a small number of rotating lower dies having a weight to suppress the rotation of the two rod-shaped lower dies, thereby reducing the metal contact surface of the two rod-shaped lower dies.
  • the purpose is to properly transmit the pressing force of the upper die to the metal plate without escaping from the surface, sharpen the bending angle (R) of the metal plate, and bend it neatly to improve the bending accuracy.
  • the present invention uses two or a small number of rotating lower dies having rotation-suppressing equipment such as springs to suppress the rotation of two rod-shaped lower dies, thereby forming two rod-shaped lower dies.
  • rotation-suppressing equipment such as springs to suppress the rotation of two rod-shaped lower dies, thereby forming two rod-shaped lower dies.
  • the purpose is to increase the bending accuracy of the metal plate.
  • the present invention automatically reverses the two rod-shaped lower metal contact surfaces without manually restoring the two rod-shaped lower metal contact surfaces horizontally. The purpose is to restore the horizontal. Disclosure of the invention
  • the present invention relates to a metal plate bending apparatus, which presses a metal plate to a lower die with an upper die to bend the metal plate, and manufactures two rod-shaped lower dies having a semicircular cross section as the lower die.
  • a support for mounting two rod-shaped lower dies is provided, and two concave curved surfaces having a groove in the middle are provided on the surface of the support, and the convex curved surfaces of the two rod-shaped lower dies are It is slidably mounted on the two concave curved surfaces formed in the above, and the metal plate is placed on the metal contact surface of the two rod-shaped lower dies.
  • the feature is that the metal plate is smoothly and neatly bent while sliding and rotating the metal contact surface of the lower bar-shaped die inward.
  • the present invention also provides the metal sheet bending apparatus described above, wherein two normally used lower bar-shaped dies are removed from the two concave curved surfaces of the support, and two small curved surfaces of the support are provided.
  • the adapter has two concave semi-circular curved surfaces, and the two small concave curved surfaces formed on the adapter have two small semi-circular rod-shaped convex bottoms.
  • a curved surface is slidably mounted, and a metal plate is bent while sliding and rotating the metal contact surface of two small rod-shaped lower dies inward.It is usually used with two small rod-shaped lower dies. It is characterized in that it can be used interchangeably with two rod-shaped lower dies.
  • the present invention provides a rod-shaped lower die obtained by cutting the adjacent convex curved surface of a rod-shaped lower die having two semi-circular cross-sections of the above-mentioned metal plate bending device in a direction perpendicular to the metal contact surface. It is characterized by its use, and the bending accuracy of the metal plate is further improved by making the lower bar-shaped die narrower and narrowing the distance between the lower bar-shaped die.
  • the present invention relates to the above-mentioned metal sheet bending apparatus, Therefore, for pressing the metal plate against the lower mold and bending the metal plate, two lower molds having a semicircular cross section are manufactured as the lower mold, and the upper end of the concave curved surface of each lower mold in the longitudinal direction is formed.
  • a rotation-suppressing weight is attached to the two rod-shaped lower molds, and the two convex curved surfaces of the lower die are slidably mounted on a support having two concave curved surfaces with grooves in the middle on the surface.
  • the metal plate is placed on the metal contact surface of the lower die, and the metal plate is pressed against the lower die by the upper die, and at the same time, the metal contact surfaces of the two rod-shaped lower dies are pressed against the gravity of the rotation suppressing weight inside.
  • the feature is that it has a mechanism to bend the metal plate while rotating it, and the bending angle of the metal plate is sharp and beautiful.
  • the present invention relates to the above-described metal plate bending apparatus, and relates to pressing a metal plate against a lower die by an upper die to bend the metal plate, and manufacturing two lower die having a semicircular cross section as a lower die.
  • a rotation suppressing device such as a spring was attached to the flange or concave surface of each lower rod, and the two lower convex surfaces were provided with two concave surfaces having grooves in the middle. It is slidably mounted on the support, and the metal plate is placed on the metal contact surface of the two lower bar-shaped dies.
  • FIG. 1 is an exploded perspective view of a metal plate bending apparatus composed of an upper die, two rod-shaped lower dies having a semicircular cross section, and a support
  • FIG. 2 is a perspective view of two metal plates having a semicircular cross section
  • FIG. 3 is a cross-sectional explanatory view of a metal plate bending apparatus showing a state in which a rod-shaped lower mold is slidably mounted on a concavely curved surface of a support to bend a metal plate. The metal contact surface tilts in a V-shape as the mold slides and rotates.
  • FIG. 4 is a cross-sectional explanatory view of a metal sheet bending apparatus showing a state in which a metal sheet is bent by being inclined.
  • Fig. 4 shows a two-third circular shape obtained by cutting off approximately two-thirds of the cross section horizontally in the longitudinal direction.
  • Fig. 5 is an exploded perspective view of two lower rod-shaped dies, and Fig. 5 is an exploded perspective view of two lower rod-shaped lower dies each of which is approximately one-third in cross section cut horizontally in the longitudinal direction.
  • Fig. 6 shows an adapter mounted on the concave curved surface of the support with the two lower rod-shaped lower supports removed, and a small bivalent cross section formed on the small two concave curved surfaces formed on the adapter.
  • Fig. 7 is a cross-sectional explanatory view of a metal plate bending apparatus showing a state in which a semicircular rod-shaped lower die is slidably mounted.
  • FIG. 7 shows an adjacent convex surface in a direction perpendicular to the metal contact surface.
  • FIG. 8 is a cross-sectional view of two lower rod-shaped dies showing a state where they are cut into two pieces.
  • FIG. 9 is a cross-sectional explanatory view of the metal plate bending apparatus showing a state in which the bending angle is loosely obtuse.
  • FIG. 9 shows a slide bar having two semicircular lower dies each having a rotation suppressing weight.
  • FIG. 10 is a cross-sectional explanatory view of the metal plate bending apparatus of the present invention showing a state where the metal plate is to be bent by being mounted on the concave curved surface of the support so as to be capable of dynamic rotation, and FIG. 10 is provided with a rotation suppressing weight.
  • FIG. 11 is a cross-sectional explanatory view of the metal plate bending apparatus of the present invention showing a state in which the metal contact surface is inclined in a V-shape and the metal plate is bent as the rod-shaped lower die slides and rotates.
  • FIG. 12 is an exploded perspective view of a one-third circular rod-shaped lower die obtained by cutting approximately two-thirds of the cross-section of the rod-shaped lower die provided with a rotation suppressing weight horizontally in the longitudinal direction.
  • the figure shows a perspective view of a two-third circular lower die with approximately one-third of the cross section of the lower lower die provided with a rotation suppressing weight cut horizontally in the longitudinal direction.
  • FIG. 13 is an explanatory view, and FIG.
  • FIG. 13 is a cross-sectional view of the lower rod-shaped mold showing a state in which the adjacent convex curved surface of the lower rod-shaped mold provided with the rotation suppressing weight is cut in a direction perpendicular to the metal contact surface
  • Fig. 1 shows the metal of the present invention showing a state in which two rod-shaped lower dies having a semicircular cross section equipped with rotation suppression equipment are mounted on the concave curved surface of the support so that they can slide and rotate, and the metal plate is bent.
  • Fig. 15 is a cross-sectional view of the plate bending apparatus, and Fig. 15 is provided with a rotation suppressing device.
  • FIG. 16 is a cross-sectional view of the metal sheet bending apparatus of the present invention showing a state in which the metal contact surface is inclined in a V-shape by the sliding rotation of the rod-shaped lower die and the metal sheet is bent, and FIG. 16 shows a rotation suppressing device. It is a development view of the lower third of the present invention provided with a one-third circular shape, and the 17th is a development view of the lower lower shape of a two-third circular shape of the present invention provided with the rotation suppressing device. No.
  • FIG. 18 shows a state in which the adjacent convex curved surface of the rod-shaped lower mold provided with the rotation suppression device is cut in the direction perpendicular to the metal contact surface and mounted on the concave curved surface of the support so as to be slidable and rotatable.
  • FIG. 19 is a cross-sectional view of the metal sheet bending apparatus of the present invention, and FIG. 19 is a perspective view of the metal sheet bending apparatus of the present invention showing a state in which a spring is directly attached to a groove provided in the lower bar-shaped die.
  • the die is a normal punch-type upper die 1 shown in FIG. 1 and a bar-shaped cross section which is a feature of the present invention.
  • the lower dies 2a and 2b are composed of two lower dies 3, each of which has two semicircular rod-shaped lower dies 2a and 2b. Constitute.
  • the two lower rod-shaped dies 2 a and 2 b having a semicircular cross section have convex curved surfaces 5 a and 5 b at the bottom and metal contact surfaces 6 a and 6 b at the upper end.
  • the convex curved surfaces 5a and 5b of a and 2b are mounted on two concave curved surfaces 7a and 7b formed on the support 4 as shown in FIG.
  • the convex curved surfaces 5a and 5b of the two rod-shaped lower dies 2a and 2b slide as shown in Fig. 3.
  • the metal contact surfaces 6a and 6b of the two rod-shaped lower dies 2a and 2b are slid and rotated inward while the metal plate 8 is pressed downward by lowering the upper die 1. 2 and 3 for bending the metal plate 8 As shown in (1), it is necessary to provide a groove 13 sufficient to lower the upper die 1 between the two concave curved surfaces 7a and 7b formed on the support 4.
  • the cross section of the two rod-shaped lower dies 2a and 2b constituting the lower die 3 is formed in a semicircle, but in addition to the semicircle, as shown in FIG. About one-third of the round bar was cut off horizontally in the longitudinal direction, and as shown in Fig. 5, two-thirds of the cross section of the round bar was cut off horizontally in the longitudinal direction.
  • Such a cross section is included in the concept of a semicircle.
  • the metal plate 8 is placed on 6 a and 6 b, and the metal plate 8 is pressed downward by the pressing force of the upper die 1 halved compared to the past, and at the same time, the metal contact surfaces of the two rod-shaped lower dies 2 a and 2 b 6a and 6b are slid inward and rotated to start bending the metal plate 8, but the pressing force of the upper die 1 is applied to the metal contact of the two lower rod-shaped lower die 2a and 2b.
  • the pressing force of the upper die 1 on the lower dies 2a and 2b is released via the metal plate 8, and the metal plate 8 and the lower die 2a and 2 b, while preventing the abrasion of the eight metal plates caused by rubbing, while lowering the stroke of the upper die 1 to the position shown in Fig. 3, and simultaneously lowering the two rod-shaped lower dies 2a, 2b
  • the metal contact surfaces 6a and 6b are inclined in a V-shape, and the metal plate 8 is bent in a V-shape.
  • metal contact surface 6a, 6b has large inclination, metal plate 8 bend angle The degree becomes smaller.
  • the degree of bending of the metal plate 8 can also be adjusted by the position of the metal contact surfaces 6a and 6b of the two rod-shaped lower dies 2a and 2b, and the metal contact surfaces of the two rod-shaped lower dies 2a and 2b 6a, 6b force; As shown in Fig. 4, approximately one-third of the cross section of the round bar is cut off horizontally in the longitudinal direction, that is, the metal contact surface 6a, When the position of 6b is above, the metal contact surfaces 6a and 6b of the two lower rod dies 2a and 2b due to the sliding rotation of the two lower rod dies 2a and 2b The degree increases.
  • the metal contact surfaces 6a and 6b of the two lower dies 2a and 2b have approximately two-thirds of the cross section of the round bar cut off horizontally in the longitudinal direction.
  • the two rod-shaped lower dies 2a and 2b are slid and rotated by the two rod-shaped lower dies 2a.
  • the degree of inclination of the metal contact surfaces 6a and 6b of a and 2b becomes small.
  • the two lower dies 2a and 2b inclined by bending the metal plate 8 are returned to a horizontal state by placing a new metal plate 8 thereon (reverse sliding rotation).
  • the bending operation of the metal plate 8 as described above may be repeated.
  • two rod-shaped lower dies 2a and 2b constituting a lower die 3 used in the above-described metal plate bending apparatus are supported by a support. 4 is removed from the two concave curved surfaces 7a, 7b, and the adapter 9 is detachably mounted on the two concave curved surfaces 7a, 7b of the support 4.
  • two small concave curved surfaces 10a, 10 are formed at the upper part of the adapter 19, and two semicircular convex curved surfaces 11a, 11b are formed at the lower part thereof.
  • the two semicircular convex surfaces 11a and 11b of the adapter 19 are mounted on the two concave surfaces 7a and 7b of the support 4, and the small two The two small curved semi-circular rod-shaped lower molds 12a, 12b are mounted on the concave curved surfaces 10a, 10b so as to be slidable and rotatable. Bend.
  • the mechanism of bending the metal plate by the two small semi-circular rod-shaped lower dies 12a and 12b mounted on the adapter 9 is the same as the above-described case, and a description thereof will be omitted.
  • the adjacent convex curved surfaces of the two rod-shaped lower dies 2a and 2b constituting the lower die 3 are formed as shown in FIG.
  • the bending angle of the metal plate 8 can be reduced by providing two lower rod-shaped dies 2 a and 2 b closer together.
  • the thickness of the rod-shaped lower dies 2a and 2b does not need to be increased.
  • the material of the lower bar-shaped dies 2a and 2b the most suitable are materials such as die steel, bearing steel, and chrome molybdenum with high hardness and high wear resistance. A material whose surface is quenched may be used.
  • the length and thickness of the rod-shaped lower molds 2a and 2b are determined as appropriate depending on the thickness of the metal plate 8 to be bent, the material, the bending angle of the metal plate 8, and the like.
  • the length of b is 5 to 500 cm, and the thickness is:! Up to 300 cm is sufficient, and the area of the metal contact surfaces 6 a and 6 b of the two lower rod-shaped dies 2 a and 2 b is l X 5 c n! ⁇ 300 x 500 cm is sufficient.
  • the material of the support 4 is the same as the material of the rod-shaped lower dies 2a and 2b described above, and the size of the support 4 is larger than the two rod-shaped lower dies 2a and 2b.
  • the size of the two concave curved surfaces 7a and 7b of the support 4 is slightly larger than the convex curved surfaces 5a and 5b of the two rod-shaped lower molds 2a and 2b, and the shape of the rod is
  • the convex curved surfaces 5a and 5b of the lower molds 2a and 2b are formed so as to be rotatable and slidable within the concave curved surfaces 7a and 7b of the support 4.
  • the material of the adapter 9 is the same as the material of the rod-shaped lower molds 2a and 2b described above, and the size of the two convex curved surfaces llallb of the adapter 9 is two rod-shaped lower molds 2a,
  • the convex surface of 2b is the same as 5a and 5b, and the length and thickness of the adapter 9 small two rod-shaped lower molds 12a and 12b are determined by the thickness and material of the bent metal plate 8. It is appropriately determined according to the bending angle of the metal plate 8, etc., but usually, the length of the lower rod-shaped molds 12a and 12b is 3 to 10 O cm, and the thickness is 0.5 to 100. cm is sufficient, and the area of the metal contact surfaces 6a, 61? of the two rod-shaped lower molds 1 2a, 1 2b is 0.3 X 3 cm to 100 X 200 cm. It is enough.
  • the size of the adapter 9 is smaller than the support 4 and larger than the two rod-shaped lower dies 2a and 2b, and the two small concave curved surfaces 10a and 1
  • the size of 0b is slightly larger than the convex curved surfaces lla and 11b of the two small rod-shaped lower dies 12a and 12b, and the convex curved surfaces of the rod-shaped lower dies 12a and 12b are 11 a and 11b are formed to be rotatable and slidable within the two small concave curved surfaces 10a and 10b of the adapter 9.
  • the metal plate bending device using the special lower die described above has several dozens of flat plates of different sizes and shapes depending on the thickness and degree of bending of the metal plate to be bent, like the conventional flat lower die. It has the function of bending the metal plate 8 to an arbitrary degree using the lower mold 3 consisting of one or a few sets of rod-shaped lower molds 2a and 2b without using the lower mold. This has the advantage of reducing the number of storage locations, saving storage space, and improving work efficiency by eliminating the need for lower mold replacement.
  • the metal plate 8 When the metal plate 8 is bent, the pressing force of the upper die 1 is reduced, and the pressing force of the upper die 1 applied to the lower die 3 via the metal plate 8 is released. There is no abrasion of the metal plate 8 caused by friction between the molds 2a and 2b, and the metal plate 8 also has an advantage of good appearance and appearance.
  • the upper die 1 After the stroke of the upper die 1 reaches the bottom dead center and bends the metal plate 8, the upper die 1 is returned upward, the bent metal plate 8 is removed from the lower die 3, and the rod-shaped lower die 2a, It is necessary to reverse the rotation of 2b to restore the metal contact surfaces 6a and 6b to be horizontal.However, the weight of the lower rod-shaped dies 2a and 2b alone may not be sufficient to restore the hand. The work efficiency had to be reduced.
  • the lower die 3 is composed of the upper die 1 of a normal punch die shown in Fig. 9 and two lower die 2a and 2b having a semicircular cross section, as shown in Fig. 9. Attach the rotation-suppressing weight 15 to the upper end of the concave surface of a, 2b in the longitudinal direction, and mount these two rod-shaped lower dies 2a, 2b on the support 4 to attach a metal plate with weight. Construct a bending device.
  • the two lower rod-shaped dies 2 a and 2 b having a semicircular cross section have convex curved surfaces 5 a and 5 b below and metal contact surfaces 6 a and 6 b above, and these two rod-shaped lower dies are formed.
  • the convex curved surfaces 5a and 5b of 2a and 2b are mounted on the two concave curved surfaces 7a and 7b formed on the support 4, and the metal contact surfaces of the two rod-shaped lower dies 2a and 2b
  • the convex curved surfaces 5a and 5b of the two rod-shaped lower dies 2a and 2b slide inward and rotate.
  • the metal contact surfaces 6a and 6b are inclined in a V-shape.
  • the two rod-shaped lower dies 2a and 2b After placing the metal plate 8 on the contact surfaces 6a and 6b, as shown in Fig. 10, while lowering the upper die 1 and pressing the metal plate 8 downward, the lower die 2a and 2b The metal contact surfaces 6 a and 6 b are slid inward in a V-shape against the gravity of the rotation suppressing weight 15 inward to start bending the metal plate 8.
  • the pressing force of the upper die 1 is received and dispersed on the entire surface of the metal contact surfaces 6a and 6b of the two rod-shaped lower dies 2a and 2b of the lower die 3. Release the pressing force of upper die 1 on a and 2 b, and prevent the metal plate 8 from rubbing against the lower die 2 a and 2 b while preventing the metal plate 8 from scratching.
  • the metal contact surfaces 6a and 6b of the two rod-shaped lower molds 2a and 2b are inclined in a V-shape, and the metal plate 8 is shaped in a V-shape. Bend.
  • the metal plate 8 is bent at the position shown in FIG. 10 described above up to the position immediately before the ends of the metal contact surfaces 6 a and 6 b of the two lower rod-shaped dies 2 a and 2 b separate from each other.
  • the stroke of the upper die 1 may not be lowered until the stroke is stopped halfway, and the metal plate 8 may be bent at an obtuse angle.
  • the cross section of the two lower rod-shaped dies 2 a and 2 b to which the rotation suppressing weights 15 are attached is formed in a semicircular shape, but in addition to the semicircular shape, as shown in FIG. About one-third of the cross section was cut off horizontally in the longitudinal direction, and as shown in Fig. 12, one-third of the cross section of the round bar was cut off horizontally in the longitudinal direction.
  • the section referred to in the invention is included in the concept of a semicircular shape.
  • the degree of bending of the metal plate 8 can also be adjusted by the position of the metal contact surfaces 6a and 6b of the two lower rod dies 2a and 2b, and the metal contact surfaces of the two lower rod dies 2a and 2b.
  • the metal contact surfaces 6a and 6b of the two lower dies 2a and 2b If the metal contact surfaces 6a and 6b are located below in the semicircular cross section, the two rod-shaped lower dies 2a and 2b The degree of inclination of the metal contact surfaces 6a, 6b of the rod-shaped lower dies 2a, 2b is reduced.
  • the shape of the rotation suppressing weight 15 provided on the two rod-shaped lower dies 2a and 2b may be any shape such as a rod, a plate, a block, and other weights. ⁇
  • the weight of 15 must be 5 to 20 times lower than that of the lower bar 2a or 2b.
  • the weight of 15 is less than one-twentieth the weight of the lower bar 2a or 2b, the metal contact surfaces 6a and 6b run away from the metal plate 8 Occurs, and the metal contact surfaces 6a, 6 of the lower rods 2a, 2b If the weight of the rotation suppressing weight 15 exceeds 1/5 of the rod-shaped lower mold 2a or 2b, rotation is suppressed.
  • the application 15 becomes heavy, extra force is required to lift it, and the pressing force of the upper mold 1 must be increased accordingly, which is unsuitable because of energy loss.
  • the most suitable material for the lower rod-shaped dies 2a and 2b and the rotation-suppressing weight 15 is a material having high hardness and high wear resistance, such as copper mold, bearing steel, and chrome molybdenum. It is also possible to use ordinary steel or ordinary steel that has been hardened on its surface.
  • the length and thickness (thickness) of the rod-shaped lower dies 2a and 2b and the rotation suppressing weight 15 are appropriately determined depending on the thickness and material of the metal plate 8 to be bent, the bending angle of the metal plate 8, and the like. In the normal case, it is sufficient if the length of the lower rod-shaped molds 2a and 2b is 5 to 500 cm, and the thickness is 1 to 300 cm. It is sufficient that the area of the metal contact surfaces 6a and 6b of 2b is 1 ⁇ 5 cm to 300 ⁇ 500 cm.
  • the metal contact surfaces 6a and 6b escape from the surface of the metal plate 8, and appropriately transmit the pressing force of the upper die 1 to the metal plate 8.
  • the metal contact surfaces 6a and 6b move away from each other when the bending angle of the metal plate 8 is low, and the bending angle of the metal plate 8 becomes low, resulting in a decrease in bending accuracy.
  • the rod type lower molds 2a and 2b may be improved as described below. In other words, an example of the improved mold will be described. As shown in FIG.
  • the upper mold 1 of a normal punch mold and two lower rod-shaped molds 2a and 2b having a semicircular cross section are used to form the lower mold. 3 and the rotation of the flanges of the rod-shaped lower dies 2a and 2b
  • a spring 16 is attached as a device, and the two lower rod-shaped dies 2 a and 2 b are mounted on a support 4 to constitute a metal plate bending apparatus.
  • the two lower rod-shaped dies 2 a and 2 b having a semicircular cross section have convex curved surfaces 5 a and 5 b below and metal contact surfaces 6 a and 6 b above, and these two rod-shaped lower dies are formed.
  • the convex curved surfaces 5a and 5b of 2a and 2b are mounted on the two concave curved surfaces 7a and 7b formed on the support 4, and the metal contact surfaces of the two rod-shaped lower dies 2a and 2b
  • a force is applied to the inner ends of 6a and 6b, as shown in Fig. 15, the convex curved surfaces 5a and 5b of the two lower rod-shaped dies 2a and 2b slide inward and rotate.
  • the metal contact surfaces 6a and 6b are inclined in a V-shape.
  • the stroke of the upper mold 1 is lowered to the position of the predetermined bending angle, and at the same time, the metal contact surfaces 6a, 6b of the rod-shaped lower molds 2a, 2b are inclined in a V-shape to form a metal plate.
  • the bending angle of 8 is sharply bent into a V-shape, and at this time, the pressing force of the upper mold 1 is reduced to the metal contact surfaces 6 a and 6 b of the two lower rods 2 a and 2 b of the lower mold 3.
  • the metal plate 8 and the lower molds 2a and 2b rub against each other, so that the metal plate 8 does not have scratches and has good appearance and appearance. .
  • the two lower dies 2a and 2b Without lowering the stroke of the upper mold 1 to the position just before the ends of the metal contact surfaces 6a and 6b of It goes without saying that the metal plate 8 may be stopped and the bending angle of the metal plate 8 may be bent at an obtuse angle.
  • the cross-sections of the two bar-shaped lower dies 2a and 2b to which the springs 16 are attached are formed in a semicircular shape, but in addition to the semicircular shape, as shown in Fig. 16, the cross-section Two-thirds cut horizontally in the longitudinal direction, as shown in Fig. 17, and approximately one-third of the cross-section of the round bar cut horizontally in the longitudinal direction as shown in Fig. It is included in the concept of semicircle.
  • the degree of bending of the metal plate 8 can be adjusted by the degree of the stroke of the upper die 1. If the stroke of the upper die 1 is shallow, the two rod-shaped lower dies 2a and 2b have a metal contact surface 6a. , 6b have a small inclination, the bending angle of the metal plate 8 becomes obtuse, and if the stroke of the upper die 1 is deep, the metal contact surfaces 6a, 6 of the two rod-shaped lower dies 2a, 2b The inclination of b is large, and the bending angle of the metal plate 8 becomes an acute angle.
  • the degree of bending of the metal plate 8 can also be adjusted by the position of the metal contact surfaces 6a and 6b of the two lower rod dies 2a and 2b.
  • two lower rod dies with springs 16 attached As shown in Fig. 16, the metal contact surfaces 6a and 6b of 2a and 2b have approximately two-thirds of the cross section of a round bar cut off horizontally in the longitudinal direction, that is, a semicircle.
  • metal contact surfaces 6a and 6b Is lower, the inclination of the metal contact surfaces 6a, 6b of the two lower dies 2a, 2b due to the sliding rotation of the two lower dies 2a, 2b becomes smaller. .
  • the spring 16 provided on the lower rod dies 2a and 2b may be attached to the lower part of the lower rod dies 2a and 2b, but as shown in Fig. 19, the spring 16 is attached to the lower rod dies 2a and 2b. If there is no flange, it can be directly installed in the grooves provided in the lower bar dies 2a and 2b.
  • the spring 16 can be used as long as it is a normal spring.
  • a metal plate 8 such as a biston 17 or a damper or an absorber as shown in FIG. 18.
  • any other rotation suppressing device that suppresses the rotation of the lower bar dies 2a and 2b and restores the rotated lower bar dies 2a and 2b horizontally can be used.
  • the material for the lower rod-shaped dies 2a and 2b and the flange it is optimal to use mold steel, bearing steel, chrome molybdenum, etc. that have high hardness and high wear resistance. Power Ordinary steel or ordinary steel that has been hardened on its surface may be used.
  • the length and thickness (thickness) of the rod-shaped lower dies 2a and 2b and the flange portion are appropriately determined according to the thickness and material of the metal plate 8 to be bent, the bending angle of the metal plate 8, and the like. It is sufficient if the length of the rod-shaped lower dies 2a and 2b is 5 to 500 cm, and the thickness is 1 to 300 cm, and the metal contact of the two rod-shaped lower dies 2a and 2b is sufficient. It is sufficient that the area of the contact surfaces 6a and 6b is 1 X 5 cm to 300 X 500 cm.
  • a metal plate can be bent to an arbitrary degree using one or a small number of lower dies, regardless of the thickness of the metal plate. Unlike lower dies, dozens of flat lower dies of different sizes and shapes are used depending on the thickness and degree of bending of the metal plate to be bent.
  • the space economy is maximized because there is no need to secure a mold storage space, and there is no need for cumbersome and time-consuming replacement of the lower mold.
  • Another advantage is that the efficiency of bending a metal plate can be greatly improved.
  • the pressing force of the upper die applied to the groove surface of the lower die through the metal plate is reduced by half, and the metal contact surfaces of the two rod-shaped lower dies are rotated. There is no scratch on the metal plate surface caused by friction between the metal plate surface and the groove surface of the lower die, so that the appearance and appearance of the bent metal plate product can be improved.
  • the pressing force of the upper die when bending the metal plate is received and dispersed over the entire surface of the metal contact surfaces of the two rod-shaped lower dies. It has the advantage of maintaining the original physical strength of the metal plate, as it does not damage or degrade the physical structure, does not cause bending cracks (cracks) in the metal plate.
  • the metal plate can be bent without reaching the bottom stroke of the upper mold stroke, the impact of the upper mold stroke can be reduced, and the pressing force of the upper mold can be reduced.
  • the degree of friction between the lower mold groove surface and the metal plate surface due to pressure is reduced, eliminating the abrasion and damage of the lower mold groove surface, preventing the lower mold groove from being worn and worn, It has the advantage of improving the life of the mold and of using the mold semi-permanently and stably.
  • the present invention even when the end of the metal plate is bent or the bending dimension is short, there is an advantage that the metal plate does not come off and is bent neatly and the bending accuracy is improved.
  • the pressing force of the upper die is appropriately transmitted to the metal plate without allowing the metal contact surface to escape from the metal plate surface, and the bending angle of the metal plate is reduced.
  • (R) can be sharpened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Abstract

Dans le pliage d'une feuille métallique mis en oeuvre par une matrice supérieure pressant la feuille contre des matrices inférieures, on utilise, au lieu de matrices inférieures de différentes dimensions et formes, deux matrices inférieures du type barres tournantes pour assurer un pliage en équerre de la feuille métallique, les surfaces de contact métalliques des deux matrices inférieures du type barres inclinées étant automatiquement rétablies à leur position horizontale. L'invention concerne un dispositif de pliage de feuille métallique équipé d'éléments de commande de rotation, qui comporte un mécanisme comprenant comme matrices inférieures deux matrices inférieures du type barres présentant une section semi-circulaire, les surfaces convexes des deux matrices inférieures du type barres étant montées coulissantes rotatives sur un support qui présente deux surfaces concaves avec un sillon situé entre celles-ci. Le mécanisme est tel qu'une feuille métallique placée sur les surfaces de contact métalliques des deux matrices inférieures du type barres, est pressée par une matrice supérieure contre les matrices inférieures de façon à plier la feuille métallique et simultanément à faire tourner vers l'intérieur les matrices inférieures. L'invention concerne un dispositif de pliage de feuille métallique comportant un mécanisme qui comprend un poids suppresseur de rotation (élément suppresseur de rotation) fixé à chaque matrice inférieure du type barre, le mécanisme étant tel qu'une feuille métallique est pressée par une matrice supérieure contre les matrices inférieures, et simultanément les surfaces de contact métalliques des deux matrices inférieures du type barres se tournent vers l'intérieur, s'opposant à la force de gravité des poids suppresseurs de rotation (force de suppression, telle la force élastique, des éléments suppresseurs de rotation).
PCT/JP1999/006702 1998-12-28 1999-11-30 Dispositif de pliage de feuille metallique WO2000040348A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99973573A EP1066893A4 (fr) 1998-12-28 1999-11-30 Dispositif de pliage de feuille metallique

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP10/373221 1998-12-28
JP10373221A JP2000197918A (ja) 1998-12-28 1998-12-28 金属板折り曲げ装置
JP11049047A JP2000246340A (ja) 1999-02-25 1999-02-25 錘付金属板折り曲げ装置
JP11/49047 1999-02-25
JP11/49048 1999-02-25
JP11049048A JP2000246341A (ja) 1999-02-25 1999-02-25 回転抑制機材付金属板折曲装置

Publications (1)

Publication Number Publication Date
WO2000040348A1 true WO2000040348A1 (fr) 2000-07-13

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EP (1) EP1066893A4 (fr)
WO (1) WO2000040348A1 (fr)

Cited By (3)

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DE10111134C1 (de) * 2001-03-08 2002-07-04 Bayerische Motoren Werke Ag Verfahren zum Abkanten eines Bleches und Vorrichtung zur Durchführung des Verfahrens
RU2638465C1 (ru) * 2017-01-13 2017-12-13 Евгений Владимирович Михайлов Способ и устройство для гибки тонколистового металла
CN114850269A (zh) * 2022-05-31 2022-08-05 江苏科力西铝业有限公司 一种l型铝型材弯弧模具

Families Citing this family (4)

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GB0623139D0 (en) 2006-11-21 2006-12-27 Rolls Royce Plc A bending tool
US20130111967A1 (en) * 2011-10-10 2013-05-09 Invacare Corp. Punch and die set
AT515231B1 (de) * 2014-01-09 2015-09-15 Trumpf Maschinen Austria Gmbh Unterwerkzeug einer Biegepresse mit einer Biegewinkelmessvorrichtung
CN108453178A (zh) * 2017-12-27 2018-08-28 中核北方核燃料元件有限公司 一种核燃料组件压紧板弹簧折弯模具

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JPH0242718U (fr) * 1988-09-13 1990-03-23
JPH0299222A (ja) * 1988-09-30 1990-04-11 Kobe Steel Ltd 制振鋼板のｖ曲げ加工方法およびｖ曲げ金型
JPH0314010U (fr) * 1990-07-09 1991-02-13
JPH03124317A (ja) * 1989-10-11 1991-05-27 Nisshin Steel Co Ltd 複合型積層金属板の回転ｖ曲げ加工方法

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GB2278795B (en) * 1993-06-12 1996-10-02 Douglas Roger Hawkey Apparatus and method for working materials
JP3338317B2 (ja) * 1996-12-04 2002-10-28 株式会社アマダ 板材折曲げ加工機の金型

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JPH0242718U (fr) * 1988-09-13 1990-03-23
JPH0299222A (ja) * 1988-09-30 1990-04-11 Kobe Steel Ltd 制振鋼板のｖ曲げ加工方法およびｖ曲げ金型
JPH03124317A (ja) * 1989-10-11 1991-05-27 Nisshin Steel Co Ltd 複合型積層金属板の回転ｖ曲げ加工方法
JPH0314010U (fr) * 1990-07-09 1991-02-13

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10111134C1 (de) * 2001-03-08 2002-07-04 Bayerische Motoren Werke Ag Verfahren zum Abkanten eines Bleches und Vorrichtung zur Durchführung des Verfahrens
RU2638465C1 (ru) * 2017-01-13 2017-12-13 Евгений Владимирович Михайлов Способ и устройство для гибки тонколистового металла
CN114850269A (zh) * 2022-05-31 2022-08-05 江苏科力西铝业有限公司 一种l型铝型材弯弧模具

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EP1066893A1 (fr) 2001-01-10

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