WO2020242084A1 - Machine à plier - Google Patents
Machine à plier Download PDFInfo
- Publication number
- WO2020242084A1 WO2020242084A1 PCT/KR2020/006098 KR2020006098W WO2020242084A1 WO 2020242084 A1 WO2020242084 A1 WO 2020242084A1 KR 2020006098 W KR2020006098 W KR 2020006098W WO 2020242084 A1 WO2020242084 A1 WO 2020242084A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- adhesive
- pair
- bending
- composite panel
- die
- Prior art date
Links
- 238000005452 bending Methods 0.000 title claims abstract description 199
- 239000000853 adhesive Substances 0.000 claims abstract description 166
- 230000001070 adhesive effect Effects 0.000 claims abstract description 166
- 230000007246 mechanism Effects 0.000 claims abstract description 103
- 230000003028 elevating effect Effects 0.000 claims abstract description 49
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000002131 composite material Substances 0.000 claims description 134
- 238000000926 separation method Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 5
- 238000003462 Bender reaction Methods 0.000 abstract 2
- 239000000463 material Substances 0.000 description 13
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000002184 metal Substances 0.000 description 10
- 239000007921 spray Substances 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 6
- 239000007769 metal material Substances 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 238000000465 moulding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
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
-
- 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
-
- 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
-
- 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
- B21D5/0227—Length adjustment of the die
-
- 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
- B21D5/04—Bending sheet metal along straight lines, e.g. to form simple curves on brakes making use of clamping means on one side of the work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B11/00—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding
- F16B11/006—Connecting constructional elements or machine parts by sticking or pressing them together, e.g. cold pressure welding by gluing
Definitions
- the present invention relates to a bending machine, and more particularly, to a bending machine capable of bending the object to be processed at least once.
- a bending machine is a device for bending a part of a plate material such as a metal plate, and can bend a plate material such as a metal plate into a predetermined shape by pressing a plate material such as a metal plate with a bending tool.
- An example of such a bending machine may be a metal plate bending tool disclosed in Korean Patent Publication No. 10-2017-0047916 A (published on May 08, 2017).
- the metal plate bending tool includes an upper punch that is raised and lowered by an elevating unit that moves up and down in a vertical direction, and a lower molding unit that compresses the metal plate together with the upper punch and bends to a predetermined shape while receiving the upper punch that descends and descending.
- the bending machine as described above bends the metal plate by compressing the metal plate between the upper punch and the lower molding part.
- the bending machine as described above bends the metal plate by compressing the metal plate between the upper punch and the lower molding, so that the part bent between the lower molding and the upper punch (hereinafter referred to as the bent part) is referred to as other adjacent parts. It is not easy to bend orthogonally to (hereinafter referred to as a non-bending part).
- An object of the present invention is to provide a bending machine capable of manufacturing a composite panel with higher reliability since the composite panel can be bent after applying the adhesive to the composite panel, so that the bent state of the composite panel can be maintained by the adhesive. .
- Another object of the present invention is to provide a bending machine capable of performing the bending process of the composite panel and the applying process of the adhesive together in one device and shortening the overall processing time.
- An embodiment of the present invention is a frame body provided with an upper frame spaced apart from the lower frame on the upper side of the lower frame; A pad disposed on the upper surface of the lower frame and on which the composite panel is seated; An elevating die disposed on the upper frame to elevate in a first direction; A pair of bending machines may be disposed around the pad so as to be moved in a second direction crossing the first direction.
- the elevating die includes an elevating body disposed to elevate along the upper frame and provided with a holder for pressing the composite panel mounted on the pad with the pad; A pair of knives disposed on the lifting body;
- the elevating body may include an adhesive module disposed to be movable in a third direction crossing each of the first and second directions and supplying an adhesive to at least one folding groove formed in the composite panel.
- Each of the pair of bending machines includes a moving die disposed to be moved in a second direction on the lower frame; A rotating die rotatably connected to the moving die and bending the composite panel; It may include a rotating mechanism connected to the rotating die to rotate the rotating die.
- Each of the pair of bending machines may have a protrusion formed on an upper surface of the rotating die to contact side ends of the composite panel.
- It is disposed on the frame body and may further include a lifting mechanism for lifting the lifting body.
- It may further include a moving mechanism for moving the pair of bending machines in the second direction.
- the lifting die may further include a knife moving mechanism for moving the pair of knives in the second direction.
- the knife moving mechanism may move the pair of knives such that the pair of knives are close to each other, or the pair of knives may be moved away from each other.
- the knife moving mechanism may move each of the pair of knives to a first bending position or to a second bending position.
- the pair of knives may be spaced apart by a first separation distance in a second direction when positioned at the first bending position.
- a second separation distance shorter than the first separation distance may be spaced apart in a second direction.
- the lifting die may further include an adhesion module moving mechanism disposed on the lifting die to move the adhesion module in the third direction.
- the adhesive module may discharge the adhesive while being moved by the adhesive module moving mechanism.
- the adhesive module may not discharge the adhesive while the adhesive module moving mechanism is in standby.
- a pair of inner folding grooves spaced apart by a short second distance may be formed.
- the adhesive module supplies an adhesive to the outer folding groove while the adhesive module moving mechanism advances the adhesive module from the upper side of the outer folding groove, and the adhesive module moving mechanism moves the adhesive module from the upper side of the inner folding groove. During retraction, the adhesive can be supplied to the inner folding groove.
- the bending machine can bend a part of the composite panel after supplying the adhesive to the composite panel, so that the manufacturing time is greater than when the adhesive supplying process and the bending process of the composite panel are performed in separate devices. This can be shortened.
- FIG. 1 is a perspective view of a composite panel according to an embodiment of the present invention before being bent by a bending machine;
- FIG. 2 is a cross-sectional view sequentially showing a process of bending a composite panel according to an embodiment of the present invention by a bending machine;
- FIG. 3 is a perspective view of a bending machine in a standby state according to an embodiment of the present invention.
- FIG. 4 is a side view of a bending machine according to an embodiment of the present invention in a standby state
- FIG. 5 is a plan view of a bending machine in a standby state according to an embodiment of the present invention.
- FIG. 6 is a control block diagram of a bending machine according to an embodiment of the present invention.
- FIG. 7 is a perspective view when a composite panel is placed on a bending machine according to an embodiment of the present invention.
- FIG. 8 is a plan view when a composite panel is placed in a bending machine according to an embodiment of the present invention.
- FIG. 9 is a perspective view when the lifting die according to an embodiment of the present invention is lowered onto the composite panel;
- FIG. 10 is a side view in which the lifting die according to the embodiment of the present invention is lowered onto the composite panel;
- FIG. 11 is a plan view of a composite panel according to an embodiment of the present invention before being positioned for a pair of moving dies;
- FIG. 12 is a plan view when a composite panel according to an embodiment of the present invention is positioned for a pair of moving dies;
- FIG. 13 is a perspective view of a knife and a rotating die according to an embodiment of the present invention when it is moved to a first bending position;
- FIG. 14 is a plan view when a knife and a rotating die are moved to a first bending position according to an embodiment of the present invention
- 15 is a perspective view when an adhesive is supplied to an outer folding groove while the adhesive module according to an embodiment of the present invention is advanced;
- FIG. 16 is a plan view when an adhesive module is advanced and an adhesive is supplied to an outer folding groove according to an embodiment of the present invention
- 17 is a perspective view of a rotating die according to an embodiment of the present invention when the composite panel is first bent;
- FIG. 18 is a plan view of a rotating die according to an embodiment of the present invention when the composite panel is first bent;
- 19 is a perspective view when a knife and a rotating die are moved to a second bending position according to an embodiment of the present invention.
- 20 is a plan view when a knife and a rotating die according to an embodiment of the present invention are moved to a second bending position;
- 21 is a perspective view when an adhesive is supplied to an inner folding groove while the adhesive module according to an embodiment of the present invention is retracted;
- 22 is a plan view when an adhesive is supplied to an inner folding groove while the adhesive module according to an embodiment of the present invention is retracted;
- FIG. 23 is a perspective view of a rotating die according to an embodiment of the present invention when the composite panel is secondarily bent;
- 24 is a plan view of a composite panel when a rotating die according to an embodiment of the present invention is bent secondarily
- Fig. 25 is a perspective view when the lifting die shown in Fig. 23 is raised.
- FIG. 1 is a perspective view of a composite panel according to an embodiment of the present invention before being bent by a bending machine
- FIG. 2 is a sequential diagram illustrating a process of bending a composite panel according to an embodiment of the present invention by a bending machine. It is a cross-sectional view.
- the composite panel 1 may be a combination of a plurality of members, and may be used to form the exterior of a home appliance such as an air conditioner, a washing machine or a refrigerator (hereinafter, home appliance, etc.). Such a composite panel 1 may be used as a part forming the exterior of a home appliance after being bent and manufactured in a three-dimensional shape.
- the composite panel 1 may be a combination or a conjugate of at least one metal material and at least one synthetic resin material.
- the composite panel 1 may have a synthetic resin material 4 positioned between a pair of metal materials 2 and 3.
- the pair of metal materials 2 and 3 constituting the composite panel 1 may be made of the same material, or may be made of different materials.
- An example of the metal material 2 and 3 constituting the composite panel 1 may be an aluminum material, and in this case, the synthetic resin material may be positioned between a pair of aluminum materials.
- An example of a synthetic resin material may be HDPE or the like.
- the composite panel 1 After the composite panel 1 is entirely manufactured in a plate shape, it may be bent into a three-dimensional shape by a bending machine 20.
- the composite panel 1 may have a thickness in the first direction (Z), and may be a rectangular plate whose length in the second direction (Y) is shorter than that in the third direction (X).
- the third direction (X) may be defined as a longitudinal direction of the composite panel 1
- the second direction (Y) may be defined as a unidirectional direction of the composite panel (1).
- the composite panel 1 may be bent by the bending machine 20 in a state in which a plurality of folding grooves 11, 12, 13, 14 in which the adhesive 10 can be accommodated are formed.
- a plurality of folding grooves (11) (12) (13) (14) are formed by performing V-groove processing on the composite panel (1) where the synthetic resin material (4) is located between a pair of metal materials (2) (3). Can be.
- the plurality of folding grooves 11, 12, 13, 14 may be formed in a shape recessed in one surface 15 of the composite panel 1, as shown in FIGS. 1 and 2A. .
- the plurality of folding grooves 11, 12, 13, and 14 may include a pair of outer folding grooves 11, 14 and a pair of inner folding grooves 12 and 13.
- the pair of outer folding grooves 11 and 14 may be elongated in the third direction X, and may be separated by a first distance L1 in the second direction Y.
- the pair of inner folding grooves 12 and 13 may be formed to be elongated in the third direction X and separated by a second distance L2 shorter than the first distance D1 in the second direction.
- the plurality of folding grooves (11) (12) (13) (14) has an inner folding groove (12) (13) and an outer folding between the outer folding groove (11) (14) and the side end of the composite panel (1). It may be formed to be shorter than the distance between the grooves 11 and 14.
- the composite panel 1 is, as shown in FIGS. 1 and 2A, in a state in which a plurality of folding grooves 11, 12, 13, 14 are formed, It can be transferred to a bending machine 20, and the bending machine 20 is a composite panel 1 having a plurality of folding grooves 11, 12, 13, 14 formed thereon, and a plurality of folding grooves 11, 12 (13) Can be bent based on (14).
- the bending machine 20 may include an adhesive module for supplying the adhesive 10 to the plurality of folding grooves 11, 12, 13, and 14.
- the bending machine 20 supplies the adhesive 10 to each of the plurality of folding grooves 11, 12, 13, and 14, and then, based on each of the folding grooves 11, 12, 13, and 14. It is possible to bend between the folding groove and the side ends 1A and 1B of the composite panel.
- the composite panel 1 may be bent in a'b' shape by a bending machine 20, respectively, in a left part and a right part of the composite panel 1.
- a portion (hereinafter referred to as a bent portion) bent in a'b' shape by the bending machine 20 may be formed to be left and right symmetric.
- the composite panel 1 may be bent by a bending machine 20 to include a pair of bent portions 5A and 5B.
- the pair of bent portions 5A and 5B is a left bent portion bent from the left side of the central portion 6 based on the one that is not bent by the bending machine 20 (6, hereinafter, referred to as the central portion 6).
- (5A) and a right bent portion 5B bent from the right side of the central portion 6 may be included.
- Each of the left bent portion 5A and the right bent portion 5B has a first bent portion 7 that is bent substantially upward from the central portion 6 and is located opposite from the top of the first bent portion 7. It may include a second bent portion 8 bent in an approximately horizontal direction toward the other bent portion.
- the composite panel 1 When the composite panel 1 includes a left bent portion 5A and a right bent portion 5B, the composite panel 1 includes a pair of first bent portions 7 and a pair of second bent portions ( 8) may be included. In this case, the distance L3 between the pair of first bent portions 7 may be longer than the distance L4 between the pair of second bent portions 8.
- each of the left bent portion 5A and the right bent portion 5B the second bent portion 8 and the first bent portion 7 may be fixed with an adhesive 10. And, each of the left bent portion 5A and the right bent portion 5B may be fixed with the central portion 6 and the adhesive 10.
- An adhesive e.g., a first adhesive
- the fixing adhesive has a configuration different from each other in its position and the bonding object, but is referred to as an adhesive material 10 for convenience of description below.
- Bending machine 20 as shown in Figure 2 (B), after first supplying the adhesive 10 to a pair of outer folding grooves 11, 14, shown in Figure 2 (C) As described above, the outer folding groove 11 located on the left side of the pair of outer folding grooves 11 and 14 and the left end of the composite panel 1 are firstly bent, and a pair of outer folding grooves (11) Among (14), the outer folding groove (14) located on the right side and the right end of the composite panel (1) can be bent first.
- the adhesive 10, which was firstly supplied to the pair of outer folding grooves 11 and 14 by the bending machine 20, is the part that was first bent by the bending machine 20 and the part that was not firstly bent. Can be fixed.
- the adhesive 10 which was secondarily supplied to the pair of inner folding grooves 12 and 13 by the bending machine 20, is used to fix the secondly bent portion with the central part 6 by the bending machine 20. I can.
- a bending machine 20 capable of supplying the adhesive 10 and bending the composite panel 1 in the same order as described above will be described with reference to FIGS. 3 to 25.
- FIG. 3 is a perspective view illustrating a bending machine according to an embodiment of the present invention in a standby state
- FIG. 4 is a side view illustrating a bending machine in a standby state according to an embodiment of the present invention
- FIG. 5 is an implementation of the present invention.
- FIG. 6 is a control block diagram of a bending machine according to an embodiment of the present invention.
- the bending machine 20 may include a frame body 30, a pad 40, an elevating die 50, and a pair of bending machines 150.
- the frame body 30 may include an upper frame 31 and a lower frame 32.
- the upper frame 31 and the lower frame 32 may be connected by a vertical frame 33.
- the upper frame 31 may be provided above the lower frame 32 to be spaced apart from the lower frame 32 in the first direction Z.
- a part of the lifting die 50 may be positioned so as to be elevating, and the composite panel 1 may be entered from the outside or the composite panel 1 may be withdrawn to the outside.
- a gap can be formed.
- the upper frame 31 may be connected to the vertical frame 33 at a predetermined height higher than the lower frame 32.
- the pad 40 may be disposed on the upper surface of the lower frame 32.
- the pad 40 may be spaced apart from the lifting die 50 in the first direction Z.
- the composite panel 1 may be mounted on the pad 40.
- the pad 40 may be disposed to be fixedly positioned on the upper surface of the lower frame 32, and may support the composite panel 1 from the lower side of the composite panel 1.
- the size of the pad 40 may be smaller than the size of the composite panel 1. All of the composite panel 1 may not be placed on the upper surface of the pad 40, but only a part of the composite panel 1 may be placed on the upper surface of the pad 40.
- a portion of the composite panel 1 that is placed on the pad 40 and is in contact with the pad 40 may not be bent by the bending machine 20.
- the bending machine 20 may bend a portion of the composite panel 1 that is not in contact with the upper surface of the pad 40.
- the lifting die 50 may be disposed on the upper frame 31 so as to be elevated in the first direction Z.
- the lifting die 50 may be configured as a combination of a plurality of members.
- the lifting die 50 may be fixed by pressing the composite panel 1 for bending the composite panel 1.
- the lifting die 50 may function as a support for smooth bending of the composite panel 1 by contacting and supporting a portion of the composite panel 1 to be bent.
- the lifting die 50 may supply an adhesive 10 for bonding the bent portion of the composite panel 1 before bending.
- the lifting die 50 includes a lifting body 60; It may include a pair of knives 70 and the adhesion module 90.
- the elevating body 50 is disposed to be elevated along the upper frame 31, and the pair of knives 70 and the adhesive module 90 may be elevated together with the elevating body 60.
- the elevating body 60 may be disposed to elevate along the upper frame 31.
- the lifting body 60 may be provided with a holder 62 for pressing the composite panel 1 mounted on the pad 40 with the pad 40.
- the holder 62 may be provided to protrude downwardly from the lower portion of the lifting body 60.
- a plurality of holders 62 may be provided on the elevating body 60.
- the plurality of holders 62 may be spaced apart from each other in the third direction (X).
- the bottom surface of the holder 62 may be a contact surface contacting one surface of the composite panel 1, and the bottom surface of the holder 62 may be a flat surface.
- the bending machine 20 may further include an elevating mechanism 68 disposed on the frame body 30 and elevating the elevating body 60.
- the elevating mechanism 68 may include a driving source such as a motor disposed on the frame body 30, at least one gear for transmitting the power of the driving source to the elevating body 60, or a power transmission member such as a belt and a pulley. have.
- a driving source such as a motor disposed on the frame body 30, at least one gear for transmitting the power of the driving source to the elevating body 60
- a power transmission member such as a belt and a pulley. have.
- the frame body 30, in particular, the upper frame 31 may have an elevating guide 34 for guiding the elevating of the elevating body 60 to be elongated in the first direction Z.
- the lifting mechanism 68 may be controlled such that the lifting body 60 descends after the composite panel 1 is seated on the pad 40.
- the elevating body 60 can be lowered along the elevating guide 34 by the elevating mechanism 68, and the elevating mechanism 68 has a height such that the holder 62 is in contact with the upper surface of the composite panel 1. (60) can be lowered.
- the lifting mechanism 68 controls the lifting body 70 to be raised for withdrawal of the composite panel 1 Can be.
- the elevating mechanism 68 moves the elevating body 70 to a standby position or an initial position. You can descend.
- the elevating body 60 may be elevated along the elevating guide 34 by the elevating mechanism 68, and the holder 62 is raised together with the elevating body 60 to be spaced apart from the upper surface of the composite panel 1. I can.
- a pair of knives 70 may be disposed on the elevating body 60.
- the pair of knives 70 may be disposed below the lifting body 60 to be spaced apart in the second direction Y.
- the knife 70 may be a support for supporting a portion of the composite panel 1 that is bent from the opposite side of the rotating die 170 when the composite panel 1 is bent by rotation of the rotating die 170 to be described later.
- the rotating die 170 When the rotating die 170 is erected for bending the composite panel 1, a part of the composite panel 1 can be bent in the rotating die 170 between the rotating die 170 and the knife 70, and thus The bent portion may be supported by the knife 70.
- a pair of knives 70 may be arranged symmetrically.
- the pair of knives 70 may include a left knife 70A and a right knife 70B.
- the left surface of the left knife 70A may be an inclined surface
- the right surface of the right knife 70B may be an inclined surface
- a knife 70 the common configuration of the left knife 70A and the right knife 70B is referred to as a knife 70 and described.
- a pair of knives 70 may be disposed to be moved in the second direction Y on the elevating body 60.
- the lifting die 50 may further include a knife moving mechanism 80 disposed on the lifting body 60 to move the pair of knives 70 in the second direction Y.
- the knife moving mechanism 80 may include a driving source such as a motor, at least one gear for transmitting power from the driving source to the knife 70, or a power transmission member such as a belt and a pulley.
- a driving source such as a motor
- at least one gear for transmitting power from the driving source to the knife 70 or a power transmission member such as a belt and a pulley.
- the knife moving mechanism 80 moves the pair of knives 70 so that the pair of knives 70 are separated from each other in the second direction (Y), or the pair of knives 70 is moved in the second direction (Y).
- the pair of knives 70 can be moved to be close to each other.
- the knife movement mechanism 80 may correspond to the knife 70 1:1, and the same number as the knife 70 may be installed.
- the bending machine 20 may include a pair of knife movement mechanisms 80, and such a pair of knife movements
- the mechanism 80 may include a left knife moving mechanism 80A for moving the left knife 70A, and a right knife moving mechanism 80B for moving the right knife 70B.
- the same configuration and operation of the left knife moving mechanism 80A and the right knife moving mechanism 80B will be referred to as the knife moving mechanism 80 and described.
- the knife moving mechanism 80 may move each of the pair of knives 70 to a first bending position (P1, see FIG. 14) or to a second bending position (P2, see FIG. 20).
- the pair of knives 70 When the pair of knives 70 are positioned at the first bending position P1, they may be spaced apart by the first separation distance in the second direction Y. In addition, when the knife 70 on one of the tops is positioned at the second bending position P2, it may be separated by a second separation distance shorter than the first separation distance in the second direction Y.
- the adhesive module 90 may supply an adhesive to at least one folding groove 11, 12, 13, 14 formed in the composite panel 1.
- the adhesive module 90 may include an adhesive supply body 91 through which the adhesive 10 passes, and a nozzle 92 installed on the adhesive supply die and supplied to the folding groove.
- the nozzle 92 may be installed facing downward.
- the adhesive module 90 may include an adhesive valve capable of supplying or blocking the adhesive 10 to the nozzle 92.
- the adhesive valve (not shown) is directly connected to the supply body 91 or connected to the supply body 91 by an adhesive supply line to supply or block the adhesive to the supply body 91, and the supply body 91 and It is disposed between the nozzles 92 to supply or block the adhesive from the supply body 91 to the nozzle 92.
- the adhesive module 90 may be disposed on the elevating body 60.
- the adhesion module 90 may be disposed to be movable on the elevating body 60.
- the adhesion module 90 may be disposed to be moved in a third direction (X) crossing each of the first direction (Z) and the second direction (Y) on the lifting body 60.
- the bending machine may include a pair of bonding modules 90, and the pair of bonding modules may include a left bonding module 90A located on the left and a right bonding module 90B located on the right. .
- the lifting die 50 may further include an adhesion module moving mechanism 100 disposed on the lifting body 50 to move the adhesion module 90 in the third direction X.
- the adhesion module moving mechanism 100 may include a drive source such as a motor, at least one gear for transmitting power of the drive source to the adhesion module 90, or a power transmission member such as a belt and a pulley.
- a drive source such as a motor
- at least one gear for transmitting power of the drive source to the adhesion module 90 or a power transmission member such as a belt and a pulley.
- the adhesive module moving mechanism 100 may correspond to the adhesive module 90 1:1, and the same number as the adhesive module 90 may be installed.
- the bending machine 20 may include a pair of bonding module moving mechanisms 100, such a pair
- the adhesive module moving mechanism 100 of may include a left adhesive module moving mechanism 100A for moving the left adhesive module 90A, and a right adhesive module moving mechanism 100B for moving the right adhesive module 90B. .
- the same configuration and operation of the left adhesive module moving mechanism 100 and the right adhesive module moving mechanism 100B will be referred to as the adhesive module moving mechanism 100.
- the adhesive module 90 may stand by without discharging the adhesive while the adhesive module moving mechanism 100 is in standby.
- the adhesive module 90 may discharge the adhesive while being moved by the adhesive module moving mechanism 100.
- the adhesive module moving mechanism 100 advances the adhesive module 90 from the upper side of the outer folding grooves 11 and 14, the adhesive module 90 can supply the adhesive to the outer folding grooves 11 and 14. .
- the adhesive module moving mechanism 100 retracts the adhesive module 90 from the upper side of the inner folding grooves 12 and 13, the adhesive module 90 can supply the adhesive to the inner folding grooves 12 and 13 .
- a pair of bending machines 150 may be disposed to move around the pad 40 in a second direction Y crossing the first direction Z.
- the pair of bending machines 150 may include a left bending machine 150A and a right bending machine 150B.
- the common configuration and operation of the left bending machine 150A and the right bending machine 150B will be referred to as a pair of bending machines 150.
- Each of the pair of bending machines 150 includes a moving die 160 disposed to be moved in the second direction Y; A rotating die 170 for bending the composite panel 1; It may include a rotating mechanism 180 for rotating the rotating die 170.
- the moving die 160 may be disposed on the lower frame 31 to be moved in the second direction Y.
- the rotating die 170 may be rotatably connected to the moving die 160.
- the rotating die 170 may be rotatably connected to the moving die 160 by a rotating shaft.
- the rotating mechanism 180 may include a driving source such as a motor disposed on the moving body 160, at least one gear for transmitting the power of the driving source to the rotating die 170, or a power transmission member such as a belt and a pulley. have.
- the rotating mechanism 180 may directly rotate or reverse rotate the rotating die 170 by connecting a driving source such as a motor to the rotating die 170 without a separate power transmission member.
- the rotating mechanism 180 may rotate the rotating die 170 such that one surface of the rotating die 170 faces the inclined surface of the knife 70 in the second direction Y.
- the rotating mechanism 180 may reversely rotate the rotating die 170 in a direction in which the rotating die 170 is parallel to the moving body 160.
- Each of the pair of bending machines 150 may have a protrusion 172 in contact with the side end of the composite panel 1 on the upper surface of the rotating die 170.
- the protrusion 172 may protrude toward the first direction Z when the rotating die 170 is disposed in parallel with the moving die 160.
- the protrusion 172 may be elongated in the third direction (X).
- one surface facing the composite panel 1 may be configured as a flat surface
- the protrusion 172 may be in surface contact with or separated from the side end of the composite panel 1.
- the bending machine 20 may further include a bending machine moving mechanism 200 for moving the pair of bending machines 150 in the second direction Y.
- the bending machine moving mechanism 200 includes a drive source such as a motor disposed on the frame body 30 and at least one gear, belt, and pulley that transmits the power of the drive source to the bending machine 150, in particular, the moving body 160. It may include a power transmission member such as.
- the bending machine moving mechanism 200 may be provided for each of a pair of bending machines 150, and one bending machine moving mechanism 200 moves the pair of bending machines 150 in a direction in which they are pulled together. It is possible to move in a direction away from each other.
- the bending machine 20 may further include a controller 300 that controls the operation of the bending machine 20.
- the bending machine 20 may further include an input unit 400 such as a control panel through which an operator inputs an operation of the bending machine 20.
- the controller 300 may operate the bending machine 20 according to a command input through the input unit 400.
- the controller 300 can automatically supply the adhesive 10 and bend the composite panel 1.
- the controller 300 includes a lifting mechanism 68, a knife moving mechanism 80, an adhesive module 90, an adhesive module moving mechanism 100, a rotating mechanism 180, and a bending machine moving mechanism 200. ) Can be controlled together or sequentially according to a set procedure.
- FIG. 7 is a perspective view illustrating a composite panel in a bending machine according to an embodiment of the present invention
- FIG. 8 is a plan view illustrating a composite panel in a bending machine according to an embodiment of the present invention.
- the composite panel 1 may enter between the lifting die 50 and the pad 40 to be seated on the pad 40, as illustrated in FIGS. 7 and 8.
- the plurality of folding grooves 11, 12, 13, 14 shown in FIG. 1 may be raised toward the lifting die 50.
- FIG. 9 is a perspective view illustrating a lifting die according to an embodiment of the present invention lowered onto a composite panel
- FIG. 10 is a side view illustrating a lifting die according to an embodiment of the present invention lowered onto the composite panel.
- the controller 300 can start an operation for bending the composite panel 1, and for this purpose, the lifting mechanism 68 can be controlled in the lowering mode. have.
- the elevating mechanism 68 may lower the elevating die 50 as shown in FIGS. 7 and 9.
- the lifting mechanism 68 lowers the lifting die 50 to a height where the lower surface of the holder 62 of the lifting die 50 is in contact with the upper surface of the composite panel 1, and the holder 62 is The portion seated on the pad 40 may be pressed in a downward direction.
- a portion of the composite panel 1 that is seated on the pad 40 may be constrained in the first direction Z by the pad 40 and the holder 62, and the composite panel 1 is in the first direction Z Movement to may be restricted.
- FIG. 11 is a plan view of a composite panel according to an embodiment of the present invention before being positioned for a pair of moving dies
- FIG. 12 is a plan view illustrating a composite panel according to an embodiment of the present invention for a pair of moving dies. It is a plan view when aligned.
- the controller 300 may perform a position alignment mode for position alignment of the composite panel 1.
- the position alignment mode may be a mode in which the composite panel 1 is aligned to a proper position before supplying the adhesive 10 to the composite panel 1.
- the controller 300 may control the bending machine moving mechanism 200 for this position alignment mode.
- the controller 300 may control the bending machine moving mechanism 200 in a position alignment mode.
- the distance between the protrusions 172 of the rotating die 170 of each of the pair of bending machines 150 is equal to the length of the composite panel 1 in the second direction (Y). This is a mode in which the pair of bending machines 150 are moved in the same direction as the pair of bending machines 150 are moved closer to each other.
- the left bending machine 150A and the right bending machine 150B are moved in a direction closer to each other, and the left bending machine 150A ), the protrusion 172 formed on the rotating die 170 is in contact with the left end of the composite panel 1, and the protrusion 172 formed on the rotating die 170 of the right bending machine 150B is the composite panel 1 Is in contact with the right end of
- the composite panel 1 is the projection 172 of the left bending machine 150A.
- the protrusion 172 of the right bending machine 150B is the protrusion 172 of the right bending machine 150B.
- FIG. 13 is a perspective view illustrating a knife and a rotating die according to an embodiment of the present invention when being moved to a first bending position
- FIG. 14 is a perspective view illustrating a knife and a rotating die according to an embodiment of the present invention. It is a top view.
- the controller 300 can move the pair of knives 70 to the first bending position (ie, the first bending position P1) for the first bending. have. To this end, the controller 300 may control the knife moving mechanism 80 in the first bending mode.
- the first bending position P1 may be a position in which the knife 70 is located on the upper side of the outer folding grips 11 and 14, and the nozzle 92 of the adhesion module 90 is the outer folding groove 11 ) It may be a position located above the vertical direction of (14).
- the knife moving mechanism 80 may move the knife 70 such that the knife 70 is positioned at the first bending position P1 in the first bending mode.
- the knife moving mechanism 80 moves the knife 70 so that the distance between the pair of knives 70 is shorter than the first distance between the pair of outer folding grooves 11 and 14, 13 and 14, the outer folding grooves 11 and 14 may be moved to the upper peripheral position.
- FIG. 15 is a perspective view of when the adhesive module according to an embodiment of the present invention is advanced and an adhesive is supplied to the outer folding groove
- FIG. 16 is It is a plan view when done.
- the controller 300 may perform an outer adhesive supply mode in which the adhesive 10 is supplied to the outer folding grooves 11 and 14. In the outer adhesive supply mode, the controller 300 may control the adhesive module moving mechanism 100 in the forward mode, and control the adhesive module 90 in the adhesive spraying mode.
- the adhesive module moving mechanism 100 can move the adhesive module 90 in the third direction (X) so that the adhesive module 90 advances from the upper side of the outer folding groove 11 and 14 in the forward mode, and The module 90 may perform a spray mode while moving in the third direction X, and in the spray mode of the adhesion module 90, the adhesive module 90 may spray the adhesive to the nozzle 92. .
- the adhesive module 90 can inject the adhesive 10 into the outer folding grooves 11 and 14 while linearly moving the outer folding grooves 11 and 14 along the outer folding grooves 11 and 14 from the top.
- the adhesive 10 may be filled in the outer folding grooves 11 and 14 along the longitudinal direction of the outer folding grooves 11 and 14.
- the controller 300 may stop the adhesive module moving mechanism 100, and the controller 300 allows the adhesive module 90 to move to the forward position (F).
- the adhesive module 90 can be controlled in an adhesive non-spray mode.
- FIG. 17 is a perspective view illustrating a rotating die according to an exemplary embodiment of the present invention when the composite panel is first bent
- FIG. 18 is a plan view illustrating a rotating die according to an exemplary embodiment of the present invention when the composite panel is first bent.
- the controller 300 uses the bending machine 150 to first bend the composite panel 1. It can be controlled in the first bending mode.
- the bending machine 150 may control the rotating mechanism 180 in the bending mode in the first bending mode.
- the rotating mechanism 180 can be erected by rotating the rotating die 170 in one direction in which one surface of the rotating die 170 faces the knife 70, and the composite panel 1
- the portion between the outer folding grooves 11 and 14 and the side end of the composite panel 1 may be rotated together with the rotating die 170 while being bent in the rotational direction of the rotating die 170, and the rotating die 170
- the bent portion can be maintained in a bent state between the rotating die 170 and the knife 70.
- the portion bent by the rotating die 170 (hereinafter, the primary bent portion) is between the outer folding groove 11, 14 and the inner folding groove 12, 13 of the composite panel 1 It can be bent roughly orthogonal to the part where it is located.
- the primary bent portion may be fixed to a portion between the outer folding groove 11 and 14 and the inner folding groove 12 and 13 by an adhesive 10 accommodated in the outer folding groove 11 and 14.
- the rotating mechanism 180 can reversely rotate the rotating die 170 in the opposite direction when the rotating die 170 is erected, and the rotating die 170 may be formed with the moving die 160 The rotating die 170 can be reversely rotated until it is located on the same plane.
- the first bending mode may be completed.
- FIG. 19 is a perspective view illustrating a knife and a rotating die according to an embodiment of the present invention when being moved to a second bending position
- FIG. 20 is a perspective view illustrating a knife and a rotating die according to an exemplary embodiment of the present invention. It is a top view.
- the controller 300 moves the pair of knives 70 to the second bending position (that is, the second bending position P2) for the second bending. I can. To this end, the controller 300 may control the knife moving mechanism 80 in the second bending mode.
- the second bending position P2 may be a position at which the knife 70 is positioned on the side of the inner folding grips 12 and 13, and the nozzle 92 of the adhesion module 90 is the inner folding groove 12 ) It may be a position located above the vertical direction of (13).
- the knife moving mechanism 80 may move the knife 70 such that the knife 70 is positioned at the second bending position P2 in the second bending mode.
- the knife moving mechanism 80 moves the knife 70 so that the distance between the pair of knives 70 is shorter than the second distance between the pair of inner folding grooves 12 and 13, As shown in FIGS. 19 and 20, it can be moved to an upper position around the inner folding grooves 12 and 13.
- FIG. 21 is a perspective view of when the adhesive module according to an embodiment of the present invention is retracted and an adhesive is supplied to the inner folding groove. It is a plan view when done.
- the controller 300 may perform an inner adhesive supply mode in which the adhesive 10 is supplied to the inner folding grooves 12 and 13.
- the controller 300 may control the adhesive module moving mechanism 100 in the retreat mode, and the adhesive module 90 may be controlled in the adhesive spraying mode.
- the adhesive module moving mechanism 100 can move the adhesive module 90 in the third direction (X) so that the adhesive module 90 is retracted from the upper side of the inner folding groove 12 and 13 in the retracted mode, and The module 90 may perform a spray mode while moving in the third direction X, and in the spray mode of the adhesion module 90, the adhesive module 90 may spray the adhesive to the nozzle 92. .
- the adhesive module 90 can spray the adhesive 10 into the inner folding grooves 12 and 13 while linearly moving the inner folding grooves 12 and 13 from the upper side along the inner folding grooves 12 and 13.
- the adhesive 10 may be filled in the inner folding grooves 12 and 13 along the longitudinal direction of the inner folding grooves 12 and 13.
- the controller 300 may stop the adhesive module moving mechanism 100, and the controller 300 is the adhesive module 90 at the retracted position (R).
- the adhesive module 90 can be controlled in an adhesive non-spray mode.
- FIG. 23 is a perspective view illustrating a second bending of a composite panel by a rotating die according to an embodiment of the present invention
- FIG. 24 is a plan view illustrating a second bending of the composite panel by a rotating die according to an exemplary embodiment of the present invention.
- the controller 300 uses the bending machine 150 to secondly bend the composite panel 1. It can be controlled in the second bending mode.
- the bending machine 150 may control the rotating mechanism 180 in the bending mode in the second bending mode.
- the rotating mechanism 180 can be erected by rotating the rotating die 170 in one direction in which one surface of the rotating die 170 faces the knife 70, and the composite panel 1
- the portion between the inner folding groove 12 and 13 and the primary bent portion may be rotated together with the rotating die 170 while bending in the rotational direction of the rotating die 170, and the portion bent by the rotating die 170
- the silver rotating die 170 and the knife 70 may maintain a bent state.
- the portion bent by the rotating die 170 (hereinafter, the secondary bent portion) is approximately perpendicular to the portion positioned between the pair of inner folding grooves 12 and 13 of the composite panel 1 It can be broken.
- the secondary bent portion may be fixed to a portion positioned between the pair of inner folding grooves 12 and 13 by the adhesive 10 accommodated in the inner folding grooves 12 and 13.
- the rotating mechanism 180 can reversely rotate the rotating die 170 in the opposite direction to when the rotating die 170 is erected, and the rotating die 170 is the moving die 160 and The rotating die 170 can be reversely rotated until it is located on the same plane.
- the second bending mode may be completed.
- Fig. 25 is a perspective view when the lifting die shown in Fig. 23 is raised.
- the controller 300 may control the lifting mechanism 68 in the ascending mode.
- the elevating mechanism 68 can raise the elevating die 50, as shown in FIG. 25.
- the lifting mechanism 68 raises the lifting die 50 to a height where the lower surface of the holder 62 of the lifting die 50 is spaced apart from the upper surface of the composite panel 1, and the holder 62 is no longer a composite panel ( 1) The part seated on the pad 40 is not pressed in the downward direction.
- the composite panel 1 on which the first bending and the second bending are completed is drawn out of the bending machine 20 between the lifting die 50 and the pad 40 Can be.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
L'invention concerne une machine à plier qui, selon le présent mode de réalisation, peut comprendre : un corps de cadre ayant un cadre supérieur disposé au-dessus d'un cadre inférieur pour être espacé du cadre inférieur ; un tampon disposé sur la surface supérieure du cadre inférieur de telle sorte qu'un panneau complexe soit assis sur celui-ci ; une matrice élévatrice disposée sur le cadre supérieur de manière à se déplacer vers le haut/vers le bas dans une première direction ; et une paire d'outils de pliage disposés sur la périphérie du tampon de façon à se déplacer dans une deuxième direction croisant la première direction. La matrice élévatrice peut comprendre : un corps d'élévation disposé de façon à se déplacer vers le haut/vers le bas le long du cadre supérieur et pourvu d'un support pour mettre sous pression le panneau complexe placé sur le tampon au moyen du tampon ; une paire de couteaux disposés sur le corps d'élévation ; et un module de fixation disposé sur le corps d'élévation de façon à se déplacer dans une troisième direction croisant chacune de la première direction et de la deuxième direction, le module de fixation fournissant un adhésif à au moins une rainure de pliage formée sur le panneau complexe. Chaque outil de pliage de la paire d'outils de pliage peut comprendre : une matrice mobile disposée au-dessus du cadre inférieur de façon à se déplacer dans la deuxième direction ; une matrice rotative reliée de manière rotative à la matrice mobile de façon à plier le panneau complexe ; et un mécanisme de rotation relié à la matrice rotative de façon à faire tourner la matrice rotative. Par conséquent, une seule machine à plier peut réaliser simultanément un processus d'application d'adhésif et un processus de pliage, et peut plier et fixer le panneau complexe rapidement et avec une fiabilité élevée.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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KR1020190064942A KR20200137876A (ko) | 2019-05-31 | 2019-05-31 | 벤딩 머신 |
KR10-2019-0064942 | 2019-05-31 |
Publications (1)
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WO2020242084A1 true WO2020242084A1 (fr) | 2020-12-03 |
Family
ID=73553238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/KR2020/006098 WO2020242084A1 (fr) | 2019-05-31 | 2020-05-08 | Machine à plier |
Country Status (2)
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KR (1) | KR20200137876A (fr) |
WO (1) | WO2020242084A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
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KR102388794B1 (ko) | 2021-02-05 | 2022-04-20 | 웰메이트(주) | 연속처리가 가능한 굽힘가공장치 및 방법 |
CN114643302B (zh) * | 2022-03-29 | 2023-09-19 | 深圳市通构科技有限公司 | 一种对金属板进行不规则折弯的工艺及装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06198338A (ja) * | 1992-12-28 | 1994-07-19 | Fuji Photo Film Co Ltd | 金属薄板折り曲げ加工方法及び装置 |
US5901598A (en) * | 1996-05-30 | 1999-05-11 | Afon Haar Maschinenbau Gmbh & Co. | Method and apparatus for ejecting sheet metal parts from a press |
KR20010101830A (ko) * | 1999-02-12 | 2001-11-14 | 가나이 쓰도무 | 적층재의 굽힘가공방법 및 적층재 |
KR20040054993A (ko) * | 2002-12-20 | 2004-06-26 | 현대자동차주식회사 | 벤딩 장치 |
KR20080067872A (ko) * | 2007-01-17 | 2008-07-22 | 대업(주) | 금속판용 절곡장치 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20170047916A (ko) | 2015-10-26 | 2017-05-08 | 이재열 | 금속판재 벤딩툴 |
-
2019
- 2019-05-31 KR KR1020190064942A patent/KR20200137876A/ko not_active Application Discontinuation
-
2020
- 2020-05-08 WO PCT/KR2020/006098 patent/WO2020242084A1/fr active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06198338A (ja) * | 1992-12-28 | 1994-07-19 | Fuji Photo Film Co Ltd | 金属薄板折り曲げ加工方法及び装置 |
US5901598A (en) * | 1996-05-30 | 1999-05-11 | Afon Haar Maschinenbau Gmbh & Co. | Method and apparatus for ejecting sheet metal parts from a press |
KR20010101830A (ko) * | 1999-02-12 | 2001-11-14 | 가나이 쓰도무 | 적층재의 굽힘가공방법 및 적층재 |
KR20040054993A (ko) * | 2002-12-20 | 2004-06-26 | 현대자동차주식회사 | 벤딩 장치 |
KR20080067872A (ko) * | 2007-01-17 | 2008-07-22 | 대업(주) | 금속판용 절곡장치 |
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