WO2019209055A1 - Dispositif d'épaississement-étirage de composite pour épaissir et étirer une pluralité de parties courbées et son procédé de fonctionnement - Google Patents

Dispositif d'épaississement-étirage de composite pour épaissir et étirer une pluralité de parties courbées et son procédé de fonctionnement Download PDF

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Publication number
WO2019209055A1
WO2019209055A1 PCT/KR2019/005025 KR2019005025W WO2019209055A1 WO 2019209055 A1 WO2019209055 A1 WO 2019209055A1 KR 2019005025 W KR2019005025 W KR 2019005025W WO 2019209055 A1 WO2019209055 A1 WO 2019209055A1
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WO
WIPO (PCT)
Prior art keywords
thickening
semi
finished product
punch
die
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Application number
PCT/KR2019/005025
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English (en)
Korean (ko)
Inventor
김동진
Original Assignee
주식회사전우정밀
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Publication date
Application filed by 주식회사전우정밀 filed Critical 주식회사전우정밀
Publication of WO2019209055A1 publication Critical patent/WO2019209055A1/fr

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    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/21—Deep-drawing without fixing the border of the blank
    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02—Ejecting devices

Definitions

  • the present invention relates to a composite thickening drawing device for thickening and drawing a plurality of bent portions and a method of operating the same, and more particularly, to remove a blank holder from an existing drawing device while preventing a spring back phenomenon of a semi-finished product,
  • the present invention relates to a composite thickening drawing device for thickening and drawing a plurality of bent portions capable of producing a semi-finished product in one process by thickening a plurality of bent portions to prevent cracking at the bent portion, and a method of operating the same.
  • a conventional drawing device must have a blank holder to secure the workpiece on the die.
  • the blank holder is a component that grabs the end of the workpiece with high pressure to prevent wrinkles on the end of the semifinished product.
  • the spring back phenomenon refers to a phenomenon in which the amount of bending decreases due to the elasticity to recover to the original state when the material is bent and then the pressure is removed in the bending process of the plastic material. That is, the residual stress is generated in the outward direction of the semi-finished product during the blank product processing by the blank holder, and spring back occurs due to the residual stress inherent in the semi-finished product (see FIG. 3).
  • an object of the present invention is a composite thickening drawing device for drawing thickened bending parts that can produce a semi-finished product having a plurality of bending parts in one process and its To provide a method of operation.
  • Complex thickening drawing apparatus for thick drawing a plurality of bent portion comprises a punch (100) for drawing the workpiece (A), to produce a semi-finished product (B); A punch holder (200) for moving the punch (100) up and down by the operation of a first actuator (T1); A die 300 for supporting the workpiece A when the punch 100 is inserted into the inside; And a knockout 400 for drawing out the semi-finished product B from the die 300.
  • the punch 100 includes the punch holder 200.
  • the die 300 may include a die upper surface 310 in contact with a lower surface of the punch holder 200 when the first actuator T1 is operated; A die groove 320 into which the punch 100 is inserted and forming a thickening processing space C having the same shape as that of the semi-finished product B between the punch 100; An inclined surface 330 inclined at an angle ⁇ from the die upper surface 310 toward the die groove 320; And a connection surface 340 rounded with a predetermined curvature R to connect the inclined surface 330 and the upper outer circumferential surface of the die groove 320 to each other.
  • the die groove 320 extends downward while forming a step from an end of the connecting surface 340, and the plurality of bent portions J 1 , J 2 ,... , J n ) is formed to correspond to the shape is in contact with the outer surface of the semi-finished product (B).
  • the predetermined angle ⁇ is characterized in that formed from 16 ° to 20 °.
  • the predetermined angle ⁇ is characterized in that it is formed to 18 °.
  • the predetermined curvature R is characterized in that formed in 28 to 32.
  • the predetermined curvature R is characterized in that formed in 30.
  • the widths a 1 , a 2 ,..., A n of each end of the die groove 320 and the widths b 1 , b 2 , ..., b n of each end of the pressure transmission unit 110 are as follows. It is characterized by satisfying the equation.
  • the width (a 1 ) of the first stage of the die groove 320, the processing thickness (d ⁇ ) of the semi-finished product (B) and the width (b 2 ) of the second stage of the pressure transmission unit 110 is expressed by the following equation: It is characterized by being satisfied.
  • the width (e) of the workpiece (A), the width (a 1 ) of the first stage of the die groove 320 and the length (f) of the portion of the workpiece (A) over the die 300 is It is characterized by satisfying the equation.
  • the ratio g of the length f of the portion A of the workpiece A that spans the die 300 to the width e of the workpiece A and the thickness d of the workpiece A are as follows. It is characterized by satisfying the equation.
  • the drawing coefficient which is the ratio of the maximum width h of the semi-finished product B to the width e of the workpiece A, is characterized by satisfying the following equation.
  • planar shape of each end of the die groove 320 and the planar shape of each end of the pressure transmission unit 110 is any one of a circular, hexagonal, octagonal, octagonal.
  • the planar shape of the bent portion 120 is characterized in that any one of circular, hexagonal, octagonal, octagonal.
  • the knockout 400, the punch receiving plate 410, the workpiece (A) is seated on the top; A knockout pin 420 extending downward from the lower portion of the punch support plate 410 to penetrate the die 300; And a die cushion 430 supporting the knockout pin 420 and being lifted by the operation of the second actuator T2 to draw the semi-finished product B from the die 300. .
  • a method of operating a thickening drawing apparatus for thickening and drawing a plurality of bent portions includes a work piece on a centerline D connecting a center of a punch 100 and a center of a die groove 320. Positioning the center of A) (S100); The punch (100) is lowered by the operation of the first actuator (T1) in contact with the workpiece (A) (S200); While the punch 100 is inserted into the die groove 320 until the punch receiving plate 410 contacts the die groove 320, the workpiece A is bent to form a semi-finished product B ( S300); And pressure transmitting unit 110 pressurizing the semi-finished product B to thicken the bent portion of the semi-finished product B (S400).
  • the method of operating a compound thickening drawing apparatus for drawing a plurality of bent portions by thickening includes: stopping operation of the first actuator (T1) and returning the punch (100) to its original position (S500); And the punch receiving plate 410 is raised by the operation of the second actuator (T2), the step of drawing out the semi-finished product (B) with the bent portion thickened from the die groove 320 (S600); It is characterized by.
  • the bent portion can produce a semi-finished product, the durability of the semi-finished product can be greatly increased (see FIGS. 5 and 6).
  • FIG. 1 and 2 illustrate a conventional drawing device.
  • 3 and 4 illustrate problems of a product processed by a conventional drawing device.
  • 5 and 6 are a perspective view and a front view of the semi-finished product (B) processed by the present invention.
  • FIG. 7 is a view comparing a finished product (B) processed by the present invention with a product processed by the prior art.
  • FIG 8 and 9 are views illustrating a composite thickening drawing apparatus for thick drawing a plurality of bent portions according to the present invention.
  • FIG. 10 is a diagram illustrating an effect according to a predetermined angle ( ⁇ ) condition of the present invention.
  • FIG. 12 is a flow chart of a method of operating a composite thickening drawing device for thickening and drawing a plurality of bent portions according to the present invention.
  • FIGS. 8 and 9 are drawings illustrating a drawing apparatus for thick drawing a bent portion according to the present invention.
  • the drawing apparatus for thickening and drawing the bent portion according to the present invention includes a punch 100, a punch holder 200, a die 300, and a knockout 400.
  • the punch 100 serves to generate the semi-finished product B by drawing the workpiece A, and the punch 100 includes a pressure transmitting part 110 and a bent part 120.
  • the pressure transmitting part 110 protrudes downward from the punch holder 200 to form a step, and thickens a plurality of bending portions J 1 , J 2 ,..., J n formed in the semi-finished product B. It serves to deliver the pressure generated by the first actuator (T1) to the semi-finished product (B).
  • the bent portion 120 is formed to protrude downward from the pressure transmission unit 110, and serves to bend the workpiece (A) to form the semi-finished product (B).
  • the punch holder 200 serves to move the punch 100 up and down by the operation of the first actuator T1. That is, when the punch 100 moves downward by the operation of the first actuator T1, the bent portion 120 bends the workpiece A to form the semi-finished product B, and thereafter, the pressure transmitting part 110 ) Pressurizes the semi-finished product B to thicken the bent portion of the semi-finished product B. (See FIG. 9).
  • the die 300 serves to support the workpiece A when the punch 100 is inserted into the die 100, and the die 300 has a die upper surface 310, a die groove 320, and an inclined surface 330. ) And a connection surface 340.
  • the die upper surface 310 is a surface which is in contact with the lower surface of the punch holder 200 when the first actuator T1 is operated, and is formed to be parallel to the lower surface of the punch holder 200.
  • the die groove 320 is a groove into which the punch 100 is inserted, and extends downward while forming a step from an end of the connection surface 340.
  • the inner surface of the die groove 320 is formed to correspond to the shape of the plurality of bent portions (J 1 , J 2 , ..., J n ) formed in the semi-finished product (B). Accordingly, the outer surface of the semi-finished product B is in contact with the inner surface of the die groove 320 (see FIG. 9).
  • the lower surface and the outer surface of the thickening processing space (C) is formed by the die groove 320
  • the upper surface and the inner surface of the thickening processing space (C) is the pressure transmission unit 110 and the bent portion It is formed by 120.
  • planar shape of each end of the die groove 320 and the planar shape of each end of the pressure transmission unit 110 may be formed of any one of a circle, a hexagon, an octagon, and a pentagon.
  • planar shape of the bent portion 120 may be formed of any one of a circular, hexagonal, octagonal, pentagonal.
  • each end of the die groove 320 need not be the same shape as each other.
  • the first stage may be circular and the second stage may be hexagonal.
  • the planar shape of each end of the die groove 320 and the planar shape of each end of the pressure transmission unit 110 should be the same shape, but the planar shape of the bent portion 120 is not necessarily the same.
  • the first stage of the die groove 320 is circular and the second stage is hexagonal
  • the first stage of the pressure transmission unit 110 should be circular and the second stage should be hexagonal, but the bent portion 120 is It may be hemispherical (see FIG. 11).
  • the inclined surface 330 is formed to be inclined at a predetermined angle ⁇ from the die upper surface 310 toward the die groove 320.
  • the predetermined angle ⁇ is formed from 16 ° to 20 °, more preferably 18 °.
  • the inclined surface 330 is an essential element to omit the prior art blank holder, and the predetermined angle ⁇ range of the inclined surface 330 has been derived as an optimized range through a number of experiments.
  • connection surface 340 is formed to be rounded with a predetermined curvature R to connect the inclined surface 330 and the upper outer peripheral surface of the die groove 320.
  • the predetermined curvature R is formed to 28 to 32, more preferably 30.
  • the connecting surface 340 is lowered along the inclined surface 330, and before the workpiece A, which is primarily deformed, is formed into the semi-finished product B in the die groove 320, it is second to induce deformation. Configuration.
  • connection surface 340 is rounded to a predetermined curvature R, it is possible to minimize the occurrence of damage to the surface of the workpiece (A).
  • predetermined curvature (R) range of the connection surface 340 was derived as an optimized range through a number of experiments.
  • the components of the punch 100, the punch holder 200, and the die 300 as described above satisfy the following relationship in order to produce a semifinished product having a bent portion.
  • the widths a 1 , a 2 ,..., A n of each end of the die groove 320 and the widths b 1 , b 2 , ..., b n of each end of the pressure transmitting part 110 Satisfies Equation 1 below. That is, the widths a 1 , a 2 ,..., A n of each end of the die groove 320 are the widths b 1 , b 2 , ..., b n of each end of the pressure transmitting part 110. Each is formed 1.03 times wider.
  • the width (a 1 ) of the first stage of the die groove 320, the processing thickness (d ⁇ ) of the semi-finished product (B) and the width (b 2 ) of the second stage of the pressure transmission unit 110 is Equation 2 is satisfied. That is, twice the width (b 2) has a width (a 1) and the machining thickness (d ⁇ ) of the semi-finished product (B) of the first stage of the die grooves 320 of the second end of the pressure delivery section 110, It's the difference between the values.
  • the width (e) of the workpiece (A), the width (a 1 ) of the first stage of the die groove 320 and the length (f) of the portion of the workpiece (A) over the die 300 is Equation 3 is satisfied. That is, the length f of the portion of the workpiece A that spans the die 300 is the difference between the width e of the workpiece A and the width a 1 of one end of the die groove 320. Half the value.
  • the ratio (g) of the length (f) of the portion (A) of the workpiece (A) over the die 300 to the width (e) of the workpiece (A) and the thickness (d) of the workpiece (A) are as follows. Satisfies Equation 4 below.
  • the ratio (g) should be 20% or more, and when the thickness (d) of the workpiece (A) is 5.0 mm, the ratio is (g) should be 23% or more, and when the thickness (d) of the workpiece (A) is 6.0 mm, the ratio (g) should be 25% or more.
  • the drawing coefficient which is the ratio of the maximum width h of the semifinished product B to the width e of the workpiece A, satisfies Equation 5 below. That is, even when the workpiece A is processed into the semi-finished product B, the ratio of the width must be 53% or more, and when processed to less than 53%, cracks are generated at the bent portion.
  • the knockout 400 serves to withdraw the semi-finished product B from the die 300, and the knockout 400 includes a punch support plate 410, a knockout pin 420, and a die cushion 430.
  • the workpiece A is seated on an upper portion of the punch receiving plate 410.
  • the upper shape of the punch receiving plate 410 is formed to correspond to the lower shape of the semi-finished product (B).
  • the knockout pin 420 extends downward from the lower portion of the punch support plate 410 to penetrate the die 300, and the die cushion 430 supports the knockout pin 420, and the second actuator T2. It rises by the operation of) and serves to withdraw the semi-finished product (B) from the die (300).
  • FIG. 12 is a flowchart illustrating a method of operating a drawing apparatus for thick drawing a bent portion according to the present invention
  • FIGS. 13 to 18 are views illustrating an operating state according to FIG. 12.
  • the operation method of the drawing device for drawing thickening the bending portion according to the present invention is the step (S100), the contacting step (S200), the forming step (S300), the step of thickening (S400).
  • step S100 the center of the workpiece A is positioned on the centerline D connecting the center of the punch 100 and the center of the die groove 320. At this time, the end of the workpiece (A) is in contact with the inclined surface (330). Accordingly, the height of the semi-finished product (B) processed by the operation of the present invention can be formed uniformly to minimize the defective rate (see Fig. 13).
  • the punch 100 is lowered by the operation of the first actuator (T1) to contact the workpiece (A). That is, the lower surface of the bent portion 120 is in contact with the upper surface of the workpiece (A). (See Figure 14)
  • the punch 100 is inserted into the die groove 320 until the punch receiving plate 410 contacts the die groove 320. Accordingly, the workpiece (A) is bent to form a semi-finished product (B). That is, i) the workpiece (A) pressed by the bent portion 120 is first deformed (bending) while descending along the inclined surface 330, ii) after the workpiece (A) than the connection surface 340 Secondly deformed (bent) at a large angle, and iii) finally the sidewall of semifinished product B is positioned between the inner side of die groove 320 and the outer side of bend 120 and pressure transfer 110. It is deformed in third order. By sequentially deforming the workpiece A in this manner, breakage of the workpiece A caused by sudden deformation can be prevented (see FIG. 15).
  • the semi-finished product B since the die groove 320 and the pressure transmission unit 110 form a plurality of steps, the semi-finished product B also forms a plurality of bending portions J 1 , J 2 ,..., J n .
  • a multi-stage semifinished product (B) is formed by one drawing process.
  • the pressure transmitting unit 110 pressurizes the semi-finished product B to thicken the plurality of bent portions J 1 , J 2 ,..., J n of the semi-finished product B. That is, the pressure transmission unit 110 presses the upper side of each sidewall of the semi-finished product B downward to plastically deform the semi-finished product B so as to fill the empty space in the thickening processing space C. (See Figure 16)
  • the operation of the first actuator T1 is stopped, and the punch 100 returns to its original position (see FIG. 17).
  • the punch support plate 410 is raised by the operation of the second actuator (T2), and withdraws the semi-finished product (B) having the bent portion thickened from the die groove 320 ( 18).
  • the thicker the workpiece (A) can solve the problem of the semi-finished side that is a problem, and the bent part crack of the semi-finished product (B) by producing a drawing semi-finished product with the bent portion thickened ) Can be prevented (see FIGS. 5, 6 and 7). And by removing the blank holder of the conventional drawing device to significantly reduce the production cost of the equipment, it is possible to significantly improve workability by omitting the blank holder operating step.
  • the productivity of the present invention can be greatly improved by forming a plurality of bent portions J 1 , J 2 ,..., J n of the semi-finished product B by one drawing process.

Abstract

La présente invention concerne un dispositif d'épaississement-étirage de composite pour épaissir et étirer une pluralité de parties courbées, et son procédé de fonctionnement. Un dispositif d'épaississement-étirage de composite pour épaissir et étirer une pluralité de parties courbées selon un mode de réalisation de la présente invention comprend : un poinçon (100) pour produire une pièce à travailler (A) en un produit semi-fini (B) ; un support (200) de poinçon pour déplacer le poinçon (100) vers le haut et vers le bas ; une matrice (300) pour supporter la pièce à travailler (A) ; et un éjecteur (400) pour retirer le produit semi-fini (B) de la matrice (300). De plus, le dispositif d'épaississement-étirage de composite pour épaissir et étirer une pluralité de parties courbées comprend : une unité de transmission de pression (110) pour transmettre une pression au produit semi-fini (B) de façon à épaissir une pluralité de parties courbées (J1, J2, …, Jn) formées sur le produit semi-fini (B) ; et une partie de pliage (120) pour plier la pièce à travailler (A) de façon à former le produit semi-fini (B).
PCT/KR2019/005025 2018-04-27 2019-04-25 Dispositif d'épaississement-étirage de composite pour épaissir et étirer une pluralité de parties courbées et son procédé de fonctionnement WO2019209055A1 (fr)

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KR1020180049065A KR102062229B1 (ko) 2018-04-27 2018-04-27 복수 개의 절곡부위를 증육드로잉하는 복합 증육 드로잉 장치 및 그 작동방법
KR10-2018-0049065 2018-04-27

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN110976606A (zh) * 2019-11-19 2020-04-10 苏州三维精密机械有限公司 一种异型零件拉伸工艺及拉伸设备

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JP2001001060A (ja) * 1999-06-21 2001-01-09 Toyota Auto Body Co Ltd 深絞り成形品及びその成形方法並びに成形装置
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JP2016073995A (ja) * 2014-10-06 2016-05-12 新日鐵住金株式会社 穴端部の増肉加工方法
KR20160143811A (ko) * 2014-05-19 2016-12-14 신닛테츠스미킨 카부시키카이샤 프레스 성형 방법 및 프레스 성형용 금형

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KR101111953B1 (ko) 2009-08-04 2012-02-13 부산대학교 산학협력단 증육된 벽 부위를 가진 보스의 성형방법 및 그를 위한 금형장치

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Publication number Priority date Publication date Assignee Title
KR100195371B1 (ko) * 1994-11-21 1999-06-15 와다 아끼히로 바닥이 있는 원통형 제품의 성형방법
JP2001001060A (ja) * 1999-06-21 2001-01-09 Toyota Auto Body Co Ltd 深絞り成形品及びその成形方法並びに成形装置
JP2002153916A (ja) * 2000-11-20 2002-05-28 Koshin Giken:Kk 連続逆再絞り加工方法及び装置
KR20160143811A (ko) * 2014-05-19 2016-12-14 신닛테츠스미킨 카부시키카이샤 프레스 성형 방법 및 프레스 성형용 금형
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110976606A (zh) * 2019-11-19 2020-04-10 苏州三维精密机械有限公司 一种异型零件拉伸工艺及拉伸设备
CN110976606B (zh) * 2019-11-19 2021-06-11 苏州三维精密金属制品有限公司 一种异型零件拉伸工艺及拉伸设备

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