EP2942120A1 - Walzenbiegevorrichtung und walzenbiegeverfahren - Google Patents

Walzenbiegevorrichtung und walzenbiegeverfahren Download PDF

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Publication number
EP2942120A1
EP2942120A1 EP15166702.9A EP15166702A EP2942120A1 EP 2942120 A1 EP2942120 A1 EP 2942120A1 EP 15166702 A EP15166702 A EP 15166702A EP 2942120 A1 EP2942120 A1 EP 2942120A1
Authority
EP
European Patent Office
Prior art keywords
roll
pushing
bending
bending process
amount
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.)
Withdrawn
Application number
EP15166702.9A
Other languages
English (en)
French (fr)
Inventor
Hideki Homma
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.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
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 Toyota Motor Corp filed Critical Toyota Motor Corp
Publication of EP2942120A1 publication Critical patent/EP2942120A1/de
Withdrawn legal-status Critical Current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
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
    • B21C37/185—Making tubes with varying diameter in longitudinal direction conical tubes starting from sheet material

Definitions

  • the present invention relates to a roll-bending process apparatus and a roll-bending process method.
  • the present invention relates to a roll-bending process apparatus and a roll-bending process method for forming a bending-formed article having a tapered shape.
  • a bending-formed article having a tapered shape is manufactured by bending a plate material having a trapezoidal shape or a fan-like shape.
  • a roll-bending process apparatus for example, is used.
  • Japanese Unexamined Patent Application Publication No. 2012-236207 discloses a roll-bending process apparatus including three truncated-cone shaped rolls.
  • Fig. 6 shows a roll-bending process apparatus 600.
  • the roll-bending process apparatus 600 forms a conical tubular formed article by making a roughly trapezoidal plate-like work 70 pass between a pushing roll 60 and receiving rolls 61 and 62 while pushing the pushing roll 60 toward the receiving rolls 61 and 62, and thereby bending the plate-like work 70.
  • the pushing distance that the pushing roll 60 pushes the work 70 is roughly constant in the longitudinal direction of the pushing roll 60.
  • the pushing distance at one end 60a of the pushing roll 60 is roughly equal to that at the other end 60b of the pushing roll 60.
  • the pushing roll 60 has a shape tapered in such a manner that the pushing roll 60 becomes narrower from the side of the other end 60b toward the side of the one end 60a. Therefore, the side surface of the pushing roll 60 is inclined. Consequently, the lower bottom 72 is bent at a curvature lower than that of the upper bottom 71, thus making it possible to obtain a conical tubular formed article having a predetermined taper angle.
  • the present inventors have found the following problem. In some cases, it is desired to obtain bending-formed articles having different taper angles.
  • the roll-bending process apparatus disclosed in Japanese Unexamined Patent Application Publication No. 2012-236207 can form conical tubular formed articles having different taper angles by changing the rolls to other truncated-cone shaped rolls having different taper angles.
  • truncated-cone shaped rolls have a complex structure compared to that of cylindrical rolls.
  • truncated-cone shaped rolls are not widely used and hence are not general-purpose rolls. Therefore, the preparation of a plurality of types of truncated-cone shaped rolls having different taper angles requires a high facility cost.
  • the present invention has been made in view of the above-described circumstances and an object thereof is to provide a roll-bending process apparatus and a roll-bending process method capable of forming bending-formed articles having different taper angles even when the apparatus and the method have a general-purpose structure.
  • a first exemplary aspect of the present invention is a roll-bending process apparatus including:
  • the above-described configuration makes it possible to change the pushing amount on the one end side of the pushing roll to one different from that on the other end side of the pushing roll. Therefore, it is possible to form bending-formed articles having different taper angles even though the apparatus has a general-purpose structure including three rolls each having a cylindrical side surface.
  • the first pushing amount may be larger than the second pushing amount.
  • a combination of the first and second pushing amounts may be changed.
  • Another exemplary aspect of the present invention is a roll-bending process method using a pushing roll having a cylindrical side surface and two receiving rolls each having a cylindrical side surface, the roll-bending process method being for bending a work by pushing the pushing roll toward the receiving rolls, the roll-bending process method includes:
  • the above-described configuration makes it possible to change the pushing amount on the one end side of the pushing roll to one different from that on the other end side of the pushing roll. Therefore, it is possible to form bending-formed articles having different taper angles even though a general-purpose structure including three rolls each having a cylindrical side surface is used.
  • the first pushing amount when a part having a large curvature is disposed on the one end side of the pushing roll and a part having a small curvature is disposed on the other end side of the pushing roll, the first pushing amount may be larger than the second pushing amount. Further, when bending-formed articles having different taper angels are formed, a combination of the first and second pushing amounts may be changed.
  • the work may be a trapezoidal plate including an upper bottom that forms a part having a large curvature of the bending-formed article, and a lower bottom that forms a part having a small curvature of the bending-formed article, the lower bottom being longer than the upper bottom.
  • the lower bottom may be bent at a predetermined curvature by the pushing on the other end side of the pushing roll, and the upper bottom may be bent at a predetermined curvature larger than that of the lower bottom by the pushing on the one end side of the pushing roll.
  • FIG. 1 A manufacturing method according to a first exemplary embodiment is explained with reference to Figs. 1 to 4 .
  • Figs. 1 , 2 and 4 are schematic diagrams of one process in the manufacturing method according to the first exemplary embodiment.
  • Fig. 3 is a graph showing curvatures with respect to pushing amounts. Note that in Fig. 2 , illustrations of bearing housings 13 and 14, and hydraulic cylinders 16 and 17 are omitted for clarifying the figure.
  • a roll-bending process apparatus 100 includes a pushing roll 10, receiving rolls 11 and 12, bearing housings 13 and 14, and hydraulic cylinders 16 and 17.
  • the pushing roll 10 is supported in the bearing housings 13 and 14 through the shaft body 15, and is a cylindrical body that can rotate around the axis.
  • the sidewall surface of the pushing roll 10 (also referred to as "cylindrical side surface") is in parallel with its axis. That is, the pushing roll 10 does not have a tapered shape and its taper angle is substantially 0°.
  • the pushing roll 10 is raised/lowered by the hydraulic cylinders 16 and 17 through the bearing housings 13 and 14 and the shaft body 15. For example, the pushing roll 10 can be lowered toward the receiving rolls 11 and 12.
  • the receiving rolls 11 and 12 are supported on a support pedestal (not shown) through respective shaft bodies (not shown), and are cylindrical bodies that can rotate around the axes.
  • the sidewall surfaces of the receiving rolls 11 and 12 (also referred to as "cylindrical side surfaces") are in parallel with their axes. That is, the receiving rolls 11 and 12 do not have a tapered shape and their taper angles are substantially 0°.
  • the receiving rolls 11 and 12 are arranged so that they are in parallel with each other with a predetermined gap therebetween.
  • the receiving rolls 11 and 12 are fixed so that their axes are located at predetermined positions.
  • the bearing housing 13 is disposed on the side of the other end 10b of the pushing roll 10, and the bearing housing 14 is disposed on the side of the one end 10a of the pushing roll 10. Further, the bearing housings 13 and 14 are supported by the hydraulic cylinders 16 and 17, respectively, so that they can be raised/lowered.
  • the hydraulic cylinders 16 and 17 are disposed below the bearing housings 13 and 14, respectively.
  • the hydraulic cylinder 16 adjusts the pushing amount on the other end 10b side of the pushing roll 10 through the bearing housing 13, and the hydraulic cylinder 17 adjusts the pushing amount on the one end 10a side of the pushing roll 10 through the bearing housing 14.
  • the hydraulic cylinders 16 and 17 can adjust their respective pushing amounts so that the pushing distance on the other end 10b side of the pushing roll 10 and that on the one end 10a side of the pushing roll 10 are different from each other.
  • the hydraulic cylinder 17 has a higher output than that of the hydraulic cylinder 16 so that the hydraulic cylinder 17 can achieve a larger pushing amount than that of the hydraulic cylinder 16.
  • the hydraulic cylinders 16 and 17 may adjust the pushing amounts by, for example, controlling their hydraulic flow rates by using a hydraulic control unit 18.
  • a roll-bending process is performed by making a trapezoidal plate-like work 20 pass between the pushing roll 10 and the receiving rolls 11 and 12 while pushing the pushing roll 10 toward the receiving rolls 11 and 12 (roll-bending process S1).
  • the work 20 is a trapezoidal plate made of a material that can be subjected to a roll-bending process. Examples of the material that can be subjected to a roll-bending process include a metal material such as stainless steel.
  • the work 20 includes an upper bottom 21 corresponding to the upper bottom of a trapezoid, a lower bottom 22 corresponding to the lower bottom of the trapezoid, and leg sections 23 and 24 corresponding to the legs of the trapezoid.
  • the lower bottom 22 is a side longer than the upper bottom 21.
  • a roll-bending process is performed so that the upper bottom 21 of the work 20 passes through the gap on the side of the one end 10a and the lower bottom 22 of the work 20 passes through the gap on the side of the other end 10b.
  • the pushing roll 10 is lowered so that the pushing amount on the one end 10a side of the pushing roll 10 (also referred to as “first pushing amount”) is larger than that on the other end 10b side of the pushing roll 10 (also referred to as "second pushing amount”). Note that as shown in Fig.
  • the curvature R of a bending-formed article formed by a roll-bending process apparatus is, for example, in proportion to the pushing amount L of the pushing roller.
  • the upper bottom 21 is pushed into the gap on the one end 10a side where the pushing amount is larger than that on the other end 10b side by the lowering of the pushing roll 10
  • the upper bottom 21 is pushed with a pushing amount larger than that for the lower bottom 22 that passes though the gap on the other end 10b side. Therefore, the upper bottom 21 is bent at a curvature larger than that of the lower bottom 22. Accordingly, the curvature of the upper bottom 21 is larger than that of the lower bottom 22.
  • the work 20 is continuously bent until the leg sections 23 and 24 are opposed to each other.
  • the work 20 is formed into a conical tubular formed article having a predetermined taper angle (also referred to as "bending-formed article").
  • the upper bottom 21 becomes one end of the conical tubular formed article and the lower bottom 22 becomes the other end thereof.
  • leg sections 23 and 24 of the work 20 may be welded to each other (welding process S2).
  • welding process S2 a conical tubular formed article having no tear (or no seam) in the circumference direction can be formed.
  • a conical tubular formed article can be formed.
  • a roll-bending process apparatus having a general-purpose structure i.e., a roll-bending process apparatus including a cylindrical pushing roll and cylindrical receiving rolls is used. Further, it is possible to adjust the pushing amount on the side of one end of the pushing roll and that on the side of the other end thereof by using hydraulic cylinders or the like. This makes it possible to manufacture conical tubular formed articles having different taper angles.
  • a sub-muffler for example, by performing a diameter reducing process for shrinking an end(s) of an obtained conical tubular formed article, disposing a flow path tube serving as a flow path for exhaust, and so on.
  • Fig. 5 shows a sub-muffler 200.
  • the sub-muffler 200 includes a conical tubular central section 29 having a taper angle, a flow path tube 30 for letting exhaust flow into and out from the central section 29, one end 27 extending from one end of the central section 29 and connected to the flow path tube 30, and the other end 28 extending from the other end of the central section 29 and connected to the flow path tube 30.
  • the one end 27, the other end 28, and the central section 29 are an integrated object, and are obtained by performing a diameter reducing process for the one end (upper bottom 21) and the other end (lower bottom 22) of the conical tubular formed article (see Fig. 4 ).
  • the roll-bending process apparatus according to the first exemplary embodiment may further include another roll opposed to the pushing roll 10 on the side of the receiving rolls 11 and 12.
  • the roll-bending process apparatus according to the first exemplary embodiment uses the hydraulic cylinders 16 and 17 for pushing the pushing roll, it may use an actuator other than the hydraulic cylinder. Examples of such actuators include a hydraulic motor.
  • a trapezoidal plate-like work is used in the manufacturing method according to the first exemplary embodiment, a fan-like planar work may be used in other embodiments.
  • the work 20 passes between the pushing roll 10 and the receiving rolls 11 and 12 only once in the roll-bending process S1, it may pass therebetween a plurality of times.
  • a roll-bending process apparatus (100) including a pushing roll (10) having a cylindrical side surface and two receiving rolls (11 and 12) each having a cylindrical side surface is provided.
  • the roll-bending process apparatus (100) bends a work (20) by pushing the pushing roll (10) toward the receiving rolls (11 and 12).
  • the roll-bending process apparatus (100) forms a taper-shaped bending-formed article by adjusting a pushing amount of the pushing roll (10) so that a first pushing amount on one end side (10a) of the pushing roll (10) is different from a second pushing amount on the other end side (10b) of the pushing roll (10).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP15166702.9A 2014-05-09 2015-05-07 Walzenbiegevorrichtung und walzenbiegeverfahren Withdrawn EP2942120A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2014097772A JP2015213944A (ja) 2014-05-09 2014-05-09 ロール曲げ加工装置及びロール曲げ加工方法

Publications (1)

Publication Number Publication Date
EP2942120A1 true EP2942120A1 (de) 2015-11-11

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EP15166702.9A Withdrawn EP2942120A1 (de) 2014-05-09 2015-05-07 Walzenbiegevorrichtung und walzenbiegeverfahren

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Country Link
US (1) US20150321236A1 (de)
EP (1) EP2942120A1 (de)
JP (1) JP2015213944A (de)
CN (1) CN105081019A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114850258A (zh) * 2022-04-29 2022-08-05 南通超力卷板机制造有限公司 高精度数控椎体四轴滚弯成形机

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6056781B2 (ja) * 2013-04-10 2017-01-11 トヨタ自動車株式会社 マフラー製造方法及びマフラー
KR102174742B1 (ko) * 2020-06-22 2020-11-05 김광철 롤벤딩장치
KR102185523B1 (ko) * 2020-06-22 2020-12-02 김인철 저장탱크 제조방법
CN112139314A (zh) * 2020-10-27 2020-12-29 东风佛吉亚排气控制技术有限公司 一种排气管生产用卷圆机

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674294A (en) * 1953-02-19 1954-04-06 Broderna Ekbergs Platslagerifa Plate bending machine
GB960708A (en) * 1959-11-16 1964-06-17 Albino Ferranti Improvements in or relating to sheet bending and other rolls
JPS4889158A (de) * 1972-02-29 1973-11-21
US4047411A (en) * 1977-01-03 1977-09-13 The Boeing Company Numerically controlled pyramid roll forming machine
JPH0999325A (ja) * 1995-10-04 1997-04-15 Kanzaki Kogyo Kk 円錐曲げロール
JP2000033426A (ja) * 1998-07-17 2000-02-02 Isel Co Ltd ロール曲げ方法及びその装置
JP2012236207A (ja) 2011-05-11 2012-12-06 Kurimoto Ltd ベンディングロール装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2674294A (en) * 1953-02-19 1954-04-06 Broderna Ekbergs Platslagerifa Plate bending machine
GB960708A (en) * 1959-11-16 1964-06-17 Albino Ferranti Improvements in or relating to sheet bending and other rolls
JPS4889158A (de) * 1972-02-29 1973-11-21
US4047411A (en) * 1977-01-03 1977-09-13 The Boeing Company Numerically controlled pyramid roll forming machine
JPH0999325A (ja) * 1995-10-04 1997-04-15 Kanzaki Kogyo Kk 円錐曲げロール
JP2000033426A (ja) * 1998-07-17 2000-02-02 Isel Co Ltd ロール曲げ方法及びその装置
JP2012236207A (ja) 2011-05-11 2012-12-06 Kurimoto Ltd ベンディングロール装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114850258A (zh) * 2022-04-29 2022-08-05 南通超力卷板机制造有限公司 高精度数控椎体四轴滚弯成形机

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US20150321236A1 (en) 2015-11-12
JP2015213944A (ja) 2015-12-03
CN105081019A (zh) 2015-11-25

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