US20160221053A1 - Dieless sheet forming apparatus with flexible rollers - Google Patents

Dieless sheet forming apparatus with flexible rollers Download PDF

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Publication number
US20160221053A1
US20160221053A1 US14/361,674 US201314361674A US2016221053A1 US 20160221053 A1 US20160221053 A1 US 20160221053A1 US 201314361674 A US201314361674 A US 201314361674A US 2016221053 A1 US2016221053 A1 US 2016221053A1
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US
United States
Prior art keywords
forming
sheet
roller
dieless
rollers
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
US14/361,674
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English (en)
Inventor
Beom-Soo KANG
Jun-Seok YOON
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University Industry Cooperation Foundation of Pusan National University
Original Assignee
University Industry Cooperation Foundation of Pusan National University
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
Application filed by University Industry Cooperation Foundation of Pusan National University filed Critical University Industry Cooperation Foundation of Pusan National University
Assigned to PUSAN NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION reassignment PUSAN NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOPERATION FOUNDATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KANG, BEOM-SOO, YOON, Jun-Seok
Publication of US20160221053A1 publication Critical patent/US20160221053A1/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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/14—Bending sheet metal along straight lines, e.g. to form simple curves by passing between 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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/06—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles
    • B21D5/08—Bending sheet metal along straight lines, e.g. to form simple curves by drawing procedure making use of dies or forming-rollers, e.g. making profiles making use of forming-rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/20—Bending sheet metal, not otherwise provided for
    • 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
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • 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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/02—Die constructions enabling assembly of the die parts in different ways

Definitions

  • the present invention relates to a dieless sheet forming device, and more particularly, to a dieless sheet forming device that is provided with flexible forming rollers whose curvatures are adjustable, thus being adequate for small quantity batch production.
  • upper and lower dies 1 corresponding to a desired forming shape of a sheet 3 are made, as shown in FIG. 1 , and after the sheet 3 is disposed between the upper and lower dies 1 , it is formed by means of a press.
  • the conventional sheet forming device using the dies can produce sheets having the same curved shapes as each other in large quantities, but if a desired forming shape is corrected or changed, new dies should be made, so that the die designing cost and the production cost of the final product are all increased, thus being not adequate for small quantity batch production. Besides, even though the desired forming shape is not corrected, additional costs for keeping, maintaining and discarding the dies are needed when the dies are being not used temporarily or permanently.
  • a multi-point sheet forming device includes an upper die 11 a and a lower die 11 b each having a plurality of punches movable up and down independently of each other, as shown in FIG. 2 .
  • the conventional multi-point sheet forming device adjusts the heights of the punches formed on the upper die 11 a and the lower die 11 b if a desired forming shape is corrected or changed, thus easily changing the forming shape.
  • elastic pads 25 made of for example an urethane material are disposed between forming punches 21 a and 21 b and a sheet 23 , respectively, as shown in FIG. 3 , but the lengths of the punches should be readjusted in accordance with the materials of the elastic pads 25 and desired forming shapes of the sheet 23 , which also decreases the operating efficiency of the device and the forming precision of the sheet.
  • the conventional die forming device and the conventional multi-point forming device using the plurality of punches are restricted in the size of the final forming shape in accordance with the sizes of the dies, and so as to form a large-sized sheet, therefore, the final forming shape is sectionalized and formed.
  • the sectionalized forming shapes are bonded through additional mechanical process and welding to produce the final product, and otherwise, heat is directly applied to the sheet to form the curved surface of the sheet by using residual stress generated by the heat.
  • additional processes increase the forming cost and period of the sheet.
  • the present invention has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a dieless sheet forming device that is simple in configuration to allow a forming shape to be easily corrected even if a desired forming shape is changed, while dimples or wrinkles are being not formed on the formed sheet, thus being adequate for small quantity batch production.
  • the present invention proposed a dieless sheet forming device including: two forming rollers rotatably disposed up and down to correspond with each other and bent to various curvatures; and a plurality of roller adjustment members whose one ends are fixed to each forming roller in such a manner as to be adjusted in length to adjust the curvatures of the forming rollers and the distances between the two forming rollers, wherein the curvatures of the forming rollers and the distances between the forming rollers through which a sheet to be formed is passed are adjusted by means of the roller adjustment members to change the forming shape of the sheet.
  • the sheet is formed between the two forming rollers disposed up and down, which makes the configuration of the device simple and allows the sheet to be formed without having any limitation on the lengthwise size thereof. Further, the curvatures of the forming rollers and the distance between the forming rollers are adjusted by means of the roller adjustment members, which make the forming shape easily corrected, so that the device of the invention is adequate for small quantity batch production.
  • each roller adjustment member includes an external member having an internal screw thread and an internal member having an external screw thread and is adjusted in length in accordance with the screw-coupled length between the external member and the internal member.
  • the curvatures of the forming rollers are differently adjusted by means of the length adjustment of the roller adjustment members, which produces sheets having a single curvature, a double curvature, a multi curvature, a twisted shape and the like.
  • the external member is fixed to one of two forming rollers, and the internal member is connected to the motor, so that the length of each roller adjustment member can be adjusted through the rotation of the motor.
  • Each roller adjustment member may be connected to a separate motor, and otherwise, the plurality of roller adjustment members may be adjusted in lengths through the movement of a single motor or a plurality of motors. Like this, the lengths of the roller adjustment members can be easily adjusted through the motors.
  • the end of the external member fixed to one of two forming rollers is rotatably provided with a roller guide, which has a recess having a shape of major arc (an arc bigger than a semicircle), into which the forming roller is fittedly inserted. That is, while each forming roller is being fittedly mounted into the rotatable recesses of the roller guides thereof, the roller adjustment members are adjusted in lengths to easily change the various curvatures of the forming roller.
  • the sheet to be formed is inserted between the two forming rollers and pulled so as to be passed through between the forming rollers, thus completing the forming operation of the sheet.
  • One of the forming rollers may be connected and rotated at both ends thereof to roller rotation motors, and otherwise, both of the forming rollers may be drove by the roller rotation motors. In this case, the sheet engaged with the forming rollers is pushed and formed through the rotation of the roller rotation motors.
  • Each forming roller is made of steel having high modulus of elasticity. Solid bar-type rollers can be treated through heat treatment allowing an adequate elastic behavior during forming procedure.
  • each forming roller is wound by a plurality of steel wires, and at this time, desirably, the steel wire wound on the outer peripheral surface of each forming roller becomes flat on an outside surface contacted with the sheet, through grinding. Otherwise, the steel wire wound on the outer peripheral surface of each forming roller has an oval section to allow the outside surface contacted with the sheet to be flat.
  • the sheet is formed along the continuously curved surfaces of the forming rollers having flat outer peripheral surfaces, thus providing the sheet having a smooth formed surface on which no local dimples or wrinkles exist.
  • the dieless sheet forming device can adjust the shapes of the upper and lower forming rollers and the distance between them to form a sheet, and can be accordingly simple in configuration and relatively small in installation area, thus greatly reducing the die production cost, the die storing cost and the die maintenance cost.
  • the curvatures of the forming rollers and the distances between them can be adjusted by means of the roller adjustment members, thus performing various changes in the forming shapes, so that the device can be adequate for small quantity batch production and can form a large-sized sheet, without having any limitation on the length of the sheet, thus needing no additional mechanical process.
  • the sheet can be formed along the continuous curved surfaces of the forming rollers, without having any punches, so that even the edges of the sheet can be formed and no dimples or wrinkles is formed even on a thin sheet.
  • FIG. 1 is a schematic view showing one conventional die sheet forming device.
  • FIG. 2 is a schematic view showing another conventional multi-point sheet forming device.
  • FIG. 3 is a schematic view showing still another conventional multi-point sheet forming device having elastic pads.
  • FIG. 4 is a schematic perspective view showing a dieless sheet forming device according to the present invention.
  • FIG. 5 is a perspective view showing a roller adjustment member used in the dieless sheet forming device according to the present invention.
  • FIG. 6 is a partial sectional view showing an example of the roller adjustment member of FIG. 5 coupled to a motor.
  • FIG. 7 is a sectional view showing another example of the roller adjustment member of FIG. 5 coupled to a motor.
  • FIG. 8 is a side view showing one example of a forming roller used in the dieless sheet forming device according to the present invention.
  • FIG. 9 is a side view showing another example of a forming roller used in the dieless sheet forming device according to the present invention.
  • FIG. 10 is a schematic perspective view showing one example of the sheet forming between two forming rollers.
  • FIG. 11 is a schematic perspective view showing another example of the sheet forming between two forming rollers.
  • FIG. 12 is a sectional view showing the arrangement of the upper and lower forming rollers when a convex type sheet is formed through the dieless sheet forming device according to the present invention.
  • FIG. 13 is a perspective view showing the forming shape of the sheet through the arrangement of the upper and lower forming rollers of FIG. 12 .
  • FIG. 14 is a sectional view showing the arrangement of the upper and lower forming rollers when a saddle type sheet is formed through the dieless sheet forming device according to the present invention.
  • FIG. 15 is a perspective view showing the forming shape of the sheet through the arrangement of the upper and lower forming rollers of FIG. 14 .
  • FIG. 16 is a sectional view showing the arrangement of the upper and lower forming rollers when a twisted type sheet is formed through the dieless sheet forming device according to the present invention.
  • FIG. 17 is a perspective view showing the forming shape of the sheet through the arrangement of the upper and lower forming rollers of FIG. 16 .
  • FIG. 4 is a schematic perspective view showing a dieless sheet forming device according to the present invention.
  • a dieless sheet forming device 100 according to the present invention has two forming rollers 101 a and 101 b horizontally disposed up and down to correspond with each other.
  • the forming rollers 101 a and 101 b can be flexibly bent to various curvatures, respectively.
  • Each of the forming rollers 101 a and 101 b is equipped with a plurality of roller adjustment members 103 so as to adjust the curvature.
  • FIG. 5 shows an example of the roller adjustment member 103
  • FIG. 6 is a partial sectional view showing the roller adjustment member 103 in detail.
  • the roller adjustment member 103 includes an external member 105 having an internal screw thread and an internal member 107 having an external screw thread.
  • the internal member 107 is fittedly screw-coupled to the external member 105 , and the roller adjustment member 103 is adjusted in length in accordance with the screw-coupled length between the external member 105 and the internal member 107 .
  • the roller adjustment member 103 is connected to a motor. That is, the external member 105 is fixed to the forming roller, and the internal member 107 is connected to the motor, so that as the coupled depths of the internal member 107 to the external member 105 are varied through the rotation of the motor, the whole length of the roller adjustment member 103 can be adjusted.
  • a separate motor may be connected to each roller adjustment member 103 , but as shown in FIG. 7 , the plurality of roller adjustment members 103 may be adjusted in lengths through the movement of a single motor or a plurality of motors.
  • the respective internal members 107 are rotated by means of the single motor or the plurality of motors, thus adjusting the lengths of the roller adjustment members 103 , and accordingly, the shape of the forming roller connected to one ends of the external members 105 and the distance between the upper and lower forming rollers 101 a and 101 b can be adjusted.
  • the roller adjustment member 103 has a roller guide 109 disposed rotatably at the end thereof fixed to the forming roller 101 a or 101 b , that is, at the bottom end of the external member 105 .
  • the roller guide 109 has a recess 109 a having a shape of major arc, into which the forming roller 101 a or 101 b is fittedly inserted.
  • the rotatable roller guides 109 to which the forming rollers 101 a and 101 b are fitted are adapted to allow the forming rollers 101 a and 101 b to be naturally bent when the curvatures of the forming rollers 101 a and 101 b are adjusted through the length adjustment of the roller adjustment members 103 .
  • FIGS. 8 and 9 show examples of the forming roller.
  • the forming roller 101 a is wound by a plurality of steel wires to a plurality of layers.
  • the steel wire wound on the outermost peripheral surface of the forming roller 101 a is desirably flat, on an outside surface 111 contacted with a sheet, through grinding.
  • the steel wire wound on the outermost peripheral surface of the forming roller 101 a has an oval section to allow the outside surface 111 contacted with the sheet to be flat.
  • one forming roller 101 a has been described, but the other forming roller 101 b has the same configuration as the forming roller 101 a.
  • the forming rollers 101 a and 101 b may be connected at both ends thereof to roller rotation motors 113 , thus being automatically rotated.
  • the sheet 102 is fittedly disposed between the forming rollers 101 a and 101 b and thus pushed and formed through the rotation of the forming rollers 101 a and 101 b .
  • the forming shapes of the sheet 102 are determined upon the shapes of the forming rollers 101 a and 101 b and the distance between them, and as mentioned above, the shapes of the forming rollers 101 a and 101 b and the distance between them are adjusted by means of the roller adjustment members 103 in accordance with desired forming shapes of the sheet 102 .
  • the roller rotation motors 113 may be connected to any one of the forming rollers 101 a and 101 b , thus transmitting the driving force, and otherwise, no roller rotation motors 113 may be provided.
  • the sheet 102 is inserted between the forming rollers 101 a and 101 b and pulled and formed from the opposite side to the inserted portion.
  • the forming shapes of the sheet 102 are determined upon the shapes of the forming rollers 101 a and 101 b and the distance between them, and the shapes of the forming rollers 101 a and 101 b and the distance between them are adjusted by means of the roller adjustment members 103 .
  • the forming shapes of the sheet 102 can be simply corrected in accordance with the changes of the desired forming shapes of the sheet 102 . Further, the forming rollers 101 a and 101 b providing the continuous forming surfaces are rotated while interposing the sheet 102 therebetween, thus forming the sheet 102 , so that no dimples or wrinkles exist.
  • the forming shapes of the sheet 102 are determined upon the curvatures of the two forming rollers 101 a and 101 b corresponding up and down with each other and the distance between them. That is, a length of the formed sheet 102 becomes longer as the gap between the forming rollers 101 a and 101 b is narrower, and contrarily, a length of the formed sheet 102 is shorter as the gap between the forming rollers 101 a and 101 b is wider. Under the above principle, the curved surface of the sheet 102 is formed.
  • a length of the formed sheet 102 becomes gradually longer in the order of a′>b′>c′>d′>e′, thus forming the twisted type sheet 102 .
  • the curvatures and distances of the forming rollers 101 a and 101 are adjusted to various sheets by means of the length adjustment of the roller adjustment members 103 , and accordingly, the sheet 102 can be formed to various shapes. Therefore, the sheet forming device according to the present invention can be applied for small quantity batch production, can form even the edge portions of the sheet, and can form the sheet without having the limitation on the length of the sheet.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US14/361,674 2013-03-07 2013-08-27 Dieless sheet forming apparatus with flexible rollers Abandoned US20160221053A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
KR10-2013-0024711 2013-03-07
KR1020130024711A KR101309228B1 (ko) 2013-03-07 2013-03-07 유연한 성형 롤러를 구비한 무금형 판재 성형 장치
PCT/KR2013/007642 WO2014137044A1 (ko) 2013-03-07 2013-08-27 유연한 성형 롤러를 구비한 무금형 판재 성형 장치

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US20160221053A1 true US20160221053A1 (en) 2016-08-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US14/361,674 Abandoned US20160221053A1 (en) 2013-03-07 2013-08-27 Dieless sheet forming apparatus with flexible rollers

Country Status (4)

Country Link
US (1) US20160221053A1 (ja)
JP (1) JP2016508885A (ja)
KR (1) KR101309228B1 (ja)
WO (1) WO2014137044A1 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110560533A (zh) * 2019-09-16 2019-12-13 武汉纺织大学 金属表面微结构阵列的柔性滚压成形方法及装置
CN111804777A (zh) * 2020-07-17 2020-10-23 叶杏 一种型材弯曲加工成型方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101420588B1 (ko) 2014-03-19 2014-07-17 김형호 다이리스 성형장치
KR101817838B1 (ko) * 2015-10-22 2018-01-11 부산대학교 산학협력단 곡률 반경을 향상시킨 유연한 성형 롤러 성형 장치
CN112588910B (zh) * 2020-11-26 2023-03-14 北京星航机电装备有限公司 一种曲面成型装置及曲面工件成型方法
CN117000843B (zh) * 2023-08-17 2024-05-03 烟台亿众智能科技有限公司 一种新能源柔性制造设备

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US2828654A (en) * 1952-11-25 1958-04-01 Ungerer Karl Fritz Finishing mill for thin sheet metal
US3604087A (en) * 1970-03-13 1971-09-14 Beloit Corp Antideflection roll
JPH0988935A (ja) * 1995-09-26 1997-03-31 Nippon Cable Syst Inc トルク伝達用ケーブル
JPH09295051A (ja) * 1996-04-30 1997-11-18 Showa Alum Corp 中空パネルの曲面形成方法およびそれにより得られた自動車用遮光パネル
JP2001353529A (ja) * 2000-06-14 2001-12-25 National Institute Of Advanced Industrial & Technology フレキシブルロール成形装置
KR100668068B1 (ko) * 2005-12-13 2007-01-11 대우조선해양 주식회사 다양한 형상의 이중 곡률을 가지는 금속판재를 성형하기위한 선형 배열 롤셋 및 이를 이용한 성형방법
US8210014B2 (en) * 2006-02-21 2012-07-03 Jilin University Flexible forming device for forming three-dimensional shaped workpieces
KR101034592B1 (ko) * 2008-05-30 2011-05-12 부산대학교 산학협력단 다수의 성형 펀치를 포함하는 판재 성형 장치 및 이를이용한 판재 성형 방법
CN102380532A (zh) * 2011-11-19 2012-03-21 吉林大学 用于板材三维曲面成形的曲面轧制装置和方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110560533A (zh) * 2019-09-16 2019-12-13 武汉纺织大学 金属表面微结构阵列的柔性滚压成形方法及装置
CN111804777A (zh) * 2020-07-17 2020-10-23 叶杏 一种型材弯曲加工成型方法

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Publication number Publication date
KR101309228B1 (ko) 2013-09-23
JP2016508885A (ja) 2016-03-24
WO2014137044A1 (ko) 2014-09-12

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AS Assignment

Owner name: PUSAN NATIONAL UNIVERSITY INDUSTRY-UNIVERSITY COOP

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:KANG, BEOM-SOO;YOON, JUN-SEOK;REEL/FRAME:032992/0282

Effective date: 20140529

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION