US20210178447A1 - Vehicle panel roller hemming device and processing method using the same - Google Patents

Vehicle panel roller hemming device and processing method using the same Download PDF

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Publication number
US20210178447A1
US20210178447A1 US17/055,307 US201917055307A US2021178447A1 US 20210178447 A1 US20210178447 A1 US 20210178447A1 US 201917055307 A US201917055307 A US 201917055307A US 2021178447 A1 US2021178447 A1 US 2021178447A1
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United States
Prior art keywords
panel
hemming
roller
inner panel
swing arm
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Abandoned
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US17/055,307
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English (en)
Inventor
Shinichi Takatsu
Koichi Murata
Yoshihiro Aoki
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Takatsu Manufacturing Co Ltd
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Takatsu Manufacturing Co Ltd
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Assigned to Takatsu MFG. Co., Ltd. reassignment Takatsu MFG. Co., Ltd. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AOKI, YOSHIHIRO, MURATA, KOICHI, Takatsu, Shinichi
Publication of US20210178447A1 publication Critical patent/US20210178447A1/en
Abandoned legal-status Critical Current

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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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/02—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder
    • B21D39/021—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors
    • B21D39/023—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal by folding, e.g. connecting edges of a sheet to form a cylinder for panels, e.g. vehicle doors using rollers
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
    • B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
    • B21D19/043—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of plates
    • 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
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/003—Positioning devices
    • 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
    • B21D53/00—Making other particular articles
    • B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards

Definitions

  • the present invention relates to a vehicle panel roller hemming device and a processing method using the same.
  • a member having a gently curved surface typically includes an outer panel on the front side and an inner panel on the back side provided for reinforcing the outer panel.
  • the outer panel and the inner panel are joined together by hemming by bending a flange formed on the peripheral edge part of the outer panel.
  • the workpiece in setting of the workpiece on the hemming die, the workpiece is positioned by the locators disposed on the peripheral edge part of the hemming die and fixed by clamping.
  • each locator is located on a path of the roller which moves on the peripheral edge part of the workpiece.
  • Patent Literature 1 proposes a method in which a plurality of openings which are disposed a plurality of suction tools, which come into surface contact with the lower face of a workpiece, are formed, and the lower face of the workpiece is sucked and fixed using rubber vacuum pads as the suction tools to perform roller hemming. Specifically, the lower face of the workpiece is sucked and fixed using a multistage bellows type rubber pad having a circular sectional shape as the vacuum pad. This eliminates the necessity to temporarily release the fixation by the locators.
  • Patent Literature 1 since the lower part of the workpiece is fixed using the multistage bellows type rubber pad as the suction tool, it is considered that a rubber part of the vacuum pad is deformed along with pressing-rotation of the roller during roller hemming, and the workpiece is displaced from a predetermined disposing position.
  • Patent Literature 2 discloses a roller hemming method in which a peripheral edge part of a workpiece (an outer panel of a door panel) is positioned by a plurality of claw portions, and further fixed by clamping and vacuum cups.
  • a peripheral edge part of a workpiece an outer panel of a door panel
  • clamping and vacuum cups are positioned by a plurality of claw portions, and further fixed by clamping and vacuum cups.
  • a control program for preventing the interference is an essential configuration.
  • the shape, the size, the number of vacuum cups and the like are not specified, it is estimated from the drawings or the like that the vacuum cup is a conical cup.
  • Patent Literature 2 there is a possibility that a rubber part of the vacuum cup is deformed by pressing-rotation of the roller, and the workpiece is displaced from a predetermined disposing position, for example, during hemming after the claw portions are retracted from the path of the roller.
  • Patent Literature 3 discloses a configuration in which, when a workpiece is hemmed by a hemming robot after the workpiece is aligned by means of auxiliary clamping means, an inner panel and an outer panel of the workpiece are sucked by a vacuum suction force of a suction unit, which enables the restriction force to be ensured.
  • Patent Literature 3 since a pressing unit and the auxiliary clamping means are located on a path of a roller of the hemming robot, it is considered that the pressing unit and the auxiliary clamping means constitute a hindrance to the movement of the roller. Thus, there is still a problem similar to the conventional problem in measures when the pressing unit and the auxiliary clamping means are retracted from the path of the roller.
  • FIG. 8 a conical vacuum cup having a structure similar to the structure of the vacuum pad used in Patent Literature 1 is illustrated ( FIG. 8 ), and the occurrence of displacement caused by deformation of the pad during roller hemming is assumed. Further, some of a plurality of suction units are disposed along the peripheral edge of a restriction pad to vacuum-suck the inner panel of the workpiece, and the other suction units are disposed inside a die body to vacuum-suck the outer panel. Thus, it is considered that the structure of the pressing unit may become complicated.
  • Patent Literature 1 JP 2010-240708 A
  • Patent Literature 2 JP 5288047 B2
  • Patent Literature 3 JP 2013-86181 A
  • the workpiece fixing means in the roller hemming device proposed until now has a certain degree of outer panel fixing effect by suction by the vacuum pad, such as a multistage bellows type vacuum pad, deformation caused by shrinkage of the pad under reduced pressure is large and the workpiece is displaced from a predetermined position due to a shearing force caused by the pressing-rotation of the roller, which disables accurate roller hemming. Further, when the workpiece cannot be fixed at the predetermined position as described above, a defective piece in which a part of the entire peripheral edge part of each of the inner panel and the outer panel is not hemmed is produced, which largely deteriorates productivity and quality.
  • the present invention has been made to solve the above problems, and an object thereof is to provide a vehicle panel roller hemming device and a processing method using the same that make it possible, in manufacture of a vehicle panel, to accurately set a workpiece, which includes an outer panel and an inner panel, at a predetermined position on a hemming die in roller hemming and reliably fix the panels when moving a roller during hemming, and have techniques for reducing the number of programming processes for automating roller hemming, improving the product quality, reducing the defective rate, and achieving excellent mass production.
  • the present invention is characterized by the following in order to solve the above problems.
  • a vehicle panel roller hemming device for hemming a peripheral edge part of an outer panel of a vehicle panel, the vehicle panel including the outer panel and an inner panel, by a roller of a roller hemming robot, the vehicle panel roller hemming device including:
  • a positioning mechanism configured to position the outer panel on a hemming die by a locator
  • a suction and fixing mechanism configured to suck and fix a lower face of the outer panel by a plurality of vacuum pads
  • a locator retracting mechanism configured to retract the locator from a path of the roller of the roller hemming robot during roller hemming
  • each of the vacuum pads of the suction and fixing mechanism includes:
  • a top-view shape of the opening of the skirt part is an ellipse, and a longer axis of the ellipse is substantially parallel to a direction in which a curvature of the vehicle panel is smaller.
  • ⁇ 2> The vehicle panel roller hemming device according to ⁇ 1>, in which a rise height of the skirt part from a surface of the pad base part is within a range of 3 to 5 mm.
  • the vehicle panel roller hemming device according to ⁇ 1> or ⁇ 2>, further including a swing arm device including a swing arm capable of turning, bending, and moving up and down in a space above the hemming die, in which
  • an inner panel fixing pad is disposed facing downward on a tip part of the swing arm
  • the swing arm lowers the inner panel fixing pad at a predetermined position to hold down an upper face of the inner panel with the inner panel fixing pad to prevent displacement and lift of the inner panel.
  • a vehicle panel processing method including performing roller hemming while maintaining a state where the outer panel and the inner panel are fixed at a predetermined position on the hemming die by sucking and fixing the lower face of the outer panel by the vacuum pads and holding down an upper face of the inner panel by the inner panel fixing pad of the swing arm and a state where the locator for positioning the outer panel is retracted from the path of the roller.
  • the vehicle panel roller hemming device and the processing method using the same provide a vehicle panel roller hemming device and a processing method using the same that make it possible, in manufacture of a vehicle panel, to accurately set a workpiece, which includes an outer panel and an inner panel, at a predetermined position on a hemming die in roller hemming and reliably fix the panels when moving a roller during hemming, and have techniques for reducing the number of programming processes for automating roller hemming, improving the product quality, reducing the defective rate, and achieving excellent mass production.
  • FIG. 1 is a schematic sectional view illustrating an embodiment of a roller hemming device according to the present invention.
  • FIG. 2 is a schematic perspective view illustrating an embodiment of a hemming die according to the present invention.
  • FIG. 3 is a schematic view illustrating an embodiment of a vacuum pad used in the present invention, in which (A) is a top view and (B) is a sectional view.
  • FIG. 1 is a schematic side view illustrating an embodiment of the roller hemming device according to the present invention.
  • FIG. 2 is a schematic perspective view illustrating an embodiment of a hemming die according to the present invention.
  • a vehicle panel roller hemming device 1 (hereinbelow, also merely referred to as the roller hemming device) of the present invention is a roller hemming device for hemming a peripheral edge part 210 of an outer panel 21 of a vehicle panel 2 , which includes the outer panel 21 and an inner panel 22 , by a roller of a roller hemming robot.
  • the roller hemming device 1 includes a positioning mechanism which positions the outer panel 21 on a hemming die 10 by a locator 12 , a suction and fixing mechanism which sucks and fixes a lower face of the outer panel 21 by a vacuum pad 3 , and a locator retracting mechanism which retracts the locator 12 from a path 11 of the roller of the roller hemming robot during the roller hemming.
  • the positioning mechanism of the roller hemming device 1 of the present invention is a mechanism which positions a workpiece 2 , which includes the outer panel 21 and the inner panel 22 , when the workpiece 2 is set on the hemming die 10 .
  • a plurality of locators 12 each of which moves up and down, is disposed around the hemming die 10 .
  • the workpiece 2 is set at an accurate position on the hemming die 10 by the locators 12 lifted with respect to the hemming die 10 .
  • the workpiece 2 set on the hemming die 10 is previously temporarily assembled with an adhesive applied to a peripheral edge part 220 of the inner panel 22 and the peripheral edge part 210 of the outer panel 21 which includes a flange 211 having a predetermined dimension and a predetermined angle on the peripheral edge part 210 .
  • the outer panel 21 and the inner panel 22 are temporarily assembled with the adhesive applied to the peripheral edge parts 210 , 220 .
  • the above adhesive is either a thermoplastic resin or a thermosetting resin, and preferably a high-viscosity mixture containing at least one kind of filler selected from the group consisting of inorganic or metal powder and an inorganic or metal spherical particle.
  • the suction and fixing mechanism of the present invention is a mechanism which supports, and sucks and fixes the lower face of the outer panel 21 of the workpiece 2 by the vacuum pad 3 in a state where the workpiece 2 is accurately set at the predetermined position on the hemming die 10 in the positioning mechanism.
  • the vacuum pad 3 includes at least a pad base part 30 , a skirt part 31 , a decompression space 32 , and a suction through pipe 33 .
  • the pad base part 30 is a member which fixes and supports the workpiece 2 together with the skirt part 31 and the suction through pipe 33 , and the material thereof is not particularly limited to any material as long as it is not easily deformed.
  • the skirt part 31 is a member which comes into contact with the lower face of the outer panel 21 of the workpiece 2 to suck and fix the lower face.
  • the skirt part 31 continuously rises with a predetermined thickness from the edge of the pad base part 30 , and includes an opening 34 on the upper end edge thereof.
  • the skirt part 31 may be integrally formed with the pad base part 30 , or may be formed separately from the pad base part 30 and joined to the pad base part 30 .
  • the decompression space 32 is formed in a part surrounded by the pad base part 30 and an inner wall of the skirt part 31 .
  • the material of the skirt part 31 is not particularly limited to any material as long as it is not easily deformed with the workpiece 2 sucked thereto, but preferably a thermoplastic elastomer.
  • the thermoplastic elastomer include styrene-butadiene rubber, butyl rubber, nitrile rubber, ethylene-propylene rubber, acrylic rubber, silicone rubber, and fluorine rubber. Among these materials, nitrile rubber is particularly preferably used.
  • the Shore hardness of the skirt part 31 is 40 to 90 HS, preferably 45 to 85 HS, and more preferably 60 HS.
  • the rise height of the skirt part 31 from the pad base part 30 is within the range of 3 to 5 mm, and preferably within the range of 3.5 to 4.5 mm.
  • the rise height of the skirt part 31 within the above range prevents displacement of the workpiece 2 even when the fixation by the locators 12 is released and roller hemming is performed on the workpiece 2 in a sucked state.
  • the thickness of the skirt part 31 can be appropriately set according to, for example, the hardness of the material, and is not particularly limited to any thickness. However, typically, the thickness of the skirt part 31 is preferably within the range of 1.5 to 3.5 mm.
  • the top-view shape of the opening 34 is an ellipse.
  • the longer axis of the ellipse is within the range of 50 to 125 mm, and the shorter axis thereof is within the range of 15 to 70 mm.
  • the suction through pipe 33 is a member for sucking air inside the decompression space 32 to suck the workpiece 2 , and penetrates the pad base part 30 and communicates with the decompression space 32 .
  • the material of the suction through pipe 33 is not particularly limited to any material as long as it is capable of fixing and supporting the workpiece 2 together with the pad base part 30 and the skirt part 31 and not easily deformed, and is preferably metal.
  • a method for joining the pad base part 30 and the suction through pipe 33 is not particularly limited to any method as long as they are joined together so as not to be easily detached.
  • the pad base part 30 and the suction through pipe 33 may be joined together as illustrated in FIG. 3(B) .
  • an insertion hole is formed on the central part of the pad base part 30 .
  • a metal reinforcement member 37 which includes a female thread on the inner face thereof, is fitted inside the insertion hole.
  • a male thread is formed on one end part of the suction through pipe 33 .
  • the male thread on the tip part of the suction through pipe 33 and the female thread of the metal reinforcement member 37 are screwed with each other.
  • a female thread may be formed on the inner face of the insertion hole formed on the pad base part 30 to directly screw the female thread with the male thread on the suction through pipe 33 .
  • a projection and a recess are preferably formed on the surface of the pad base part 30 , the surface facing the decompression space 32 , except a part having the opening 34 of the suction through pipe 33 .
  • a projection 35 comes into intimate contact with the surface of the workpiece 2 when the workpiece 2 is sucked. Thus, it is possible to more stably tightly fix the workpiece 2 .
  • air inside the decompression space 32 passes through a gap between the projection 35 and a recess 36 by suction and is discharged through the suction through pipe 33 , which penetrates the pad base part 30 , so that the volume of the decompression space 32 is reduced.
  • the projection 35 comes into contact with the lower face of the outer panel 21 of the workpiece 2 . Accordingly, the vacuum pad 3 is not excessively shrink-deformed, which reliably prevents displacement of the outer panel 21 caused by the suction.
  • a height difference between the recess 36 and the projection 35 is not particularly limited to any height difference as long as air can flow during suction.
  • the shape and the hardness of the projection 35 are not particularly limited to any shape and hardness as long as the projection 35 is not so deformed as to obstruct the flow of air in the recess 36 during the suction.
  • the vacuum pad 3 is disposed inside the peripheral edge of the hemming die 10 , and the longer axis of the elliptical skirt part 31 is substantially parallel to a direction in which the curvature of the vehicle panel 2 set on the hemming die 10 is smaller.
  • the curvature of an outer plate surface of a vehicle door is typically designed in such a manner that the curvature in the front-rear direction is smaller than the curvature in the up-down direction.
  • setting all the vacuum pads 3 to be disposed with their longer axes substantially parallel to the front-rear direction of the door as illustrated in FIG. 2 makes it possible to suck the workpiece 2 on the hemming die 10 so as to be brought into intimate contact with the vacuum pads 3 with no displacement, thereby accurately and reliably fixing the workpiece 2 .
  • roller hemming device 1 of the present invention may be provided with a swing arm device 4 as illustrated in FIG. 1 which includes a swing arm 43 which is capable of turning, bending, and moving up and down in a space above the hemming die 10 .
  • the swing arm device 4 of the embodiment illustrated in FIG. 1 includes a strut 41 which is disposed outside the hemming die 10 , the swing arm 43 , and a support part 42 which is disposed on the tip part of an upper part of the strut 41 to turnably support the swing arm 43 . Further, an inner panel fixing pad 44 is disposed facing downward on the tip part of the swing arm 43 . Note that the material of the inner panel fixing pad 44 is not particularly limited to any kind and performance as long as it is a solid of one kind selected from the group consisting of a metal material, a high molecular material, and a rubber material or a composite material thereof.
  • the shape of the inner panel fixing pad 44 is not particularly limited to any shape as long as the inner panel fixing pad 44 is capable of coming into contact with a flat surface of the inner panel.
  • the shape of the inner panel fixing pad 44 is preferably a circular plate shape or a columnar shape having a diameter within the range of 10 to 40 mm.
  • the swing arm device 4 is capable of holding down the upper face of the inner panel 22 from above by the inner panel fixing pad 44 by operating the support part 42 to lower the swing arm 43 at a predetermined position above the inner panel 22 . Accordingly, it is possible to reliably prevent displacement and lift of the inner panel 22 .
  • the swing arm 43 may be further provided with an inner panel reference pin on the tip part thereof to enable accurate and reliable positioning of the inner panel 22 . Further, in the case where the swing arm device 4 is formed in an arch shape illustrated in FIG. 1 , it is possible to prevent the operation of the roller of the roller hemming robot from being obstructed.
  • the vehicle panel processing method of the present embodiment executes at least a workpiece positioning step, a workpiece fixing step, a workpiece upper face holding step, and a hemming step.
  • the workpiece 2 of the vehicle panel with the outer panel 21 and the inner panel 22 previously temporarily assembled with the adhesive is set on the hemming die 10 with the surface of the outer panel 21 facing downward. At this time, the workpiece 2 is accurately positioned by the locators 12 which are disposed around the hemming die 10 .
  • the locators 12 are retracted from the path 11 of the roller of the roller hemming robot. In this state, the outer panel 21 of the workpieces 2 is strongly sucked and fixed by the vacuum pads 3 . Thus, retracting the locators 12 does not cause displacement of the position of the workpiece 2 .
  • the arch-shaped swing arm 43 supported by the support part 42 is moved by the operation of the support part 42 , which is disposed on the strut 41 of each of the two swing arm devices 4 installed outside the hemming die 10 , to bring the inner panel fixing pad 44 disposed on the tip part of the swing arm 43 into contact with the upper face of the inner panel 22 .
  • the inner panel reference pin on the tip part of the swing arm 43 enables accurate and reliable positioning of the inner panel 22 .
  • hemming is performed by the roller of the roller hemming robot in a state where the lower face of the outer panel 21 of the workpiece 2 is sucked and fixed by the plurality of vacuum pads 3 and the locators 12 are retracted, and a state where the inner panel fixing pad 44 of the swing arm 43 is in contact with the upper face of the inner panel 22 of the workpiece 2 .
  • the arch shape of the swing arm device 4 enables the roller of the roller hemming robot to pass under the arch-shaped swing arm 43 and perform hemming without interference.
  • the lower face side of the outer panel 21 of the workpiece 2 is strongly sucked and fixed by the vacuum pads 3 , and the upper face side of the inner panel 22 is pressed from above by the inner panel fixing pad 44 of the swing arm 43 .
  • the locators 12 are in a retracted state, displacement and lift are prevented, and roller hemming can be performed at an accurate set position.
  • the vehicle panel roller hemming device and the processing method using the same according to the present invention have been described above based on the embodiment.
  • the present invention is not limited to the embodiment described above, and can be variously modified and changed without departing from the gist thereof.
  • the inner panel 22 is pressed from above using the two swing arm devices 4
  • one or two or more swing arm devices 4 may be used as long as the path 11 of the roller of the roller hemming robot is not obstructed.
  • a solventless and one-pack type thermosetting epoxy resin adhesive containing 1 mass % of glass beads having an average particle diameter of 200 ⁇ m and being of a uniform paste form having a viscosity of 300 Pa ⁇ s was applied to an inner peripheral edge part of an outer panel which is made of a hot-dip galvanized steel sheet and includes a flange having a width of 8 mm and an angle of 90° on the peripheral edge part thereof and a peripheral edge part of an inner panel, and the outer panel and the inner panel were temporarily assembled by a robot to prepare a vehicle panel workpiece.
  • the above workpiece was automatically set at a predetermined position on a hemming die in accordance with a program of the roller hemming device by another robot, and positioned by a locator.
  • the vacuum pad which includes a skirt part having a thickness of 3 mm, has an elliptical shape having a longer-axis length of 94 mm and a shorter-axis length of 34 mm, is made of oil-proof nitrile rubber, and has a Shore hardness of 60 HS was used. Note that, at the point when the workpiece was set on the hemming die, it was confirmed that the upper ends of the skirt parts of all the twelve vacuum pads were in contact with the lower surface of the outer panel.
  • pre-hemming was performed using four roller hemming robots whose operation has been previously programmed to further bend the flange formed on the peripheral edge part of the outer panel of the workpiece and bent at 90° up to 145° by the rollers of the roller hemming robots.
  • roller hemming which is programmed 180° bending, was further performed on the workpiece. As a result, it was confirmed that the roller hemming was performed without a hindrance to the movement of the roller, and the position of the peripheral edge part of the outer panel of the workpiece was not displaced at all and coincided with the predetermined disposing position.
  • Example 1 The workpiece and the hemming die that are the same as those of Example 1 were used, and the workpiece was sucked and fixed on the hemming die on the same condition as Example 1.
  • an inner panel fixing pad disposed on the tip of a swing arm was brought into contact with the flat part of the surface of the inner panel substantially perpendicularly thereto, and the inner panel was pressed from above to perform lift prevention and fixation. At this stage, there was no displacement of the peripheral edge part of the outer panel and the peripheral edge part of the inner panel.
  • the swing arm disposed on the strut of each of the two swing arm devices installed outside the hemming die was automatically extended through the support part to form an arch, and the inner reference pin of each swing arm was brought into contact with the surface of the inner panel substantially perpendicularly thereto to position the inner panel.
  • pre-hemming was performed using four roller hemming robots whose operation has been previously programmed to further bend the flange formed on the peripheral edge part of the outer panel of the workpiece and bent at 90° up to 145° by the rollers of the roller hemming robots. Further, after the pre-hemming, roller hemming, which is programmed 180° bending, was performed on the workpiece.
  • the swing arm device of the present invention is effective in accurate positioning and fixation of the inner panel and precise roller hemming.
  • the adhesive was applied to the outer panel and the inner panel, and the temporarily-assembled vehicle panel workpiece was set at the predetermined position on the hemming die by the locator in the same manner as Example 1 except that a bellows vacuum pad which is made of oil-proof nitrile rubber, has a Shore hardness of 60 HS, has a circular bottom face, and includes a rubber part having a bottom face radius of 50 mm and a height of 42 mm was used as a vacuum pad for fixing the outer panel of the workpiece.
  • a bellows vacuum pad which is made of oil-proof nitrile rubber, has a Shore hardness of 60 HS, has a circular bottom face, and includes a rubber part having a bottom face radius of 50 mm and a height of 42 mm was used as a vacuum pad for fixing the outer panel of the workpiece.
  • the bellows vacuum pad was sucked to fix the outer panel. In this state, it was confirmed that the pad was crushed by pressure reduction, and the height of the rubber part became substantially half the initial height.
  • pre-hemming was performed using four roller hemming robots whose operation has been previously programmed to further bend the flange formed on the peripheral edge part of the outer panel of the workpiece and bent at 90° up to 145° by the rollers of the roller hemming robots. Further, after the pre-hemming, roller hemming, which is programmed 180° bending, was performed on the workpiece.
  • peripheral edge part (hemmed part) of the vehicle panel after the hemming was opened at a plurality of positions, and displacement from the initial predetermined position of the peripheral edge part of each of the outer panel and the inner panel was checked. As a result, it was confirmed that there was a displacement of approximately 0.5 mm from the predetermined position of the peripheral edge part of each of the outer panel and the inner panel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automobile Manufacture Line, Endless Track Vehicle, Trailer (AREA)
  • Manipulator (AREA)
US17/055,307 2018-06-11 2019-06-10 Vehicle panel roller hemming device and processing method using the same Abandoned US20210178447A1 (en)

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JP2018-111248 2018-06-11
JP2018111248A JP6986493B2 (ja) 2018-06-11 2018-06-11 車両用パネルのローラーヘミング加工装置及びこれを用いた加工方法
PCT/JP2019/022903 WO2019240072A1 (ja) 2018-06-11 2019-06-10 車両用パネルのローラーヘミング加工装置及びこれを用いた加工方法

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JP (1) JP6986493B2 (ja)
KR (1) KR20210005246A (ja)
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JPS56103613U (ja) * 1980-01-10 1981-08-13
JPS589523U (ja) * 1981-07-13 1983-01-21 川端　茂 吸着盤
JP4934533B2 (ja) * 2007-07-25 2012-05-16 王子ネピア株式会社 カートン取出供給装置
JP2010240708A (ja) * 2009-04-08 2010-10-28 Torai Engineering Kk ローラ式ヘミング加工装置
EP2520383B1 (en) 2010-09-24 2018-11-28 Nissan Motor Co., Ltd Roller hemming processing system
KR101272938B1 (ko) 2011-10-13 2013-06-11 기아자동차주식회사 차량용 패널의 롤러 헤밍 시스템

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JP2019214058A (ja) 2019-12-19

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