WO2017111478A1 - 롤 스탬핑 장치 및 방법 - Google Patents
롤 스탬핑 장치 및 방법 Download PDFInfo
- Publication number
- WO2017111478A1 WO2017111478A1 PCT/KR2016/015055 KR2016015055W WO2017111478A1 WO 2017111478 A1 WO2017111478 A1 WO 2017111478A1 KR 2016015055 W KR2016015055 W KR 2016015055W WO 2017111478 A1 WO2017111478 A1 WO 2017111478A1
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- WIPO (PCT)
- Prior art keywords
- roller set
- forming
- molding
- shape
- roll
- Prior art date
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Classifications
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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
- B21D53/00—Making other particular articles
- B21D53/88—Making other particular articles other parts for vehicles, e.g. cowlings, mudguards
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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
- 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
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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
- B21D22/02—Stamping using rigid devices or tools
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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
- 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
- B21D5/083—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 for obtaining profiles with changing cross-sectional configuration
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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
- 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
Definitions
- the present invention relates to a roll stamping apparatus and method comprising a rotary roll having a molding portion having a stamping structure applied to its outer surface.
- the stamping method is composed of an upper die, a lower punch disposed below the upper die, and a material holder disposed between the upper die and the lower punch.
- the upper die is a frame member formed in the lower surface of the groove portion to be molded to the shape of the molded article to be molded
- the lower punch is disposed on the lower portion of the upper die to drive the upper side by pushing the material running between the upper die and the lower punch upwards It is a member pressed against the upper die.
- the stamping method is a technology widely used to produce molded products, for example, automotive parts, the problem of increasing the device capacity in the application of high strength steel and the problem of breakage of the material during molding due to the weak formability of the high strength steel. There is this.
- a roll forming (RF) method which is configured to arrange a multi-stage set of fixed upper and lower rotary rolls, and to pass a coil or cut material between them, thereby forming a constant cross-sectional shape. And molding the molded part, which is a long part.
- the roll forming method using such a roll forming apparatus can be applied to high strength steel by utilizing a relatively small capacity apparatus, but has a limitation in that a molded article having a constant cross-sectional shape can be manufactured.
- the roll stamping method is a method in which a stamping structure is applied to a rotating roll to perform a variable cross-sectional roll forming while the material passes through the rotating roll.
- An object of the present invention is to provide a roll stamping apparatus and method which is free from shape defects by resolving the residual stress of the cross-sectional change portion and the force imbalance between the cross-sectional change portions.
- the present invention provides the following roll stamping method and apparatus in order to achieve the above object.
- the present invention includes a roller set that rotates while facing each other to press the both sides of the material continuously supplied in one embodiment to proceed between, a forming unit is applied to the outer surface of the roller set to form the material, the roller A plurality of sets are arranged along the direction of material progress, and each molding portion of the roller set is formed to sequentially change the cross section of the material as the material progresses, and among the roller sets before the final roller set through which the material last passes.
- the forming portion of at least one roller set provides a roll stamping device which is a set of overmolded rollers having a longer circumferential length than the forming portion of the final roller set.
- the overmolded roller set may be disposed within at least three from the final roller set.
- the molding unit may be configured with an intaglio having both sides open on the outer surface of one of the roller set of the roller set, and an embossment corresponding to the intaglio on the outer surface of the other rotating roll.
- the molded part of the roller set may be formed to planarize by sequentially forming the uneven portion or the uneven portion in the cross section of the material in accordance with the progress of the material.
- the molded part of the roller set is formed to sequentially flatten by removing the uneven part of the cross section of the material, the molded part of the final roller set and the overmolded roller set is flat in the width direction, constant in the circumferential direction And a flat portion having a length and transition portions positioned at both sides of the flat portion in the circumferential direction, and the circumferential length of the flat portion of the overmolded roller set may be longer than the circumferential length of the final roller set.
- the outer surface of the roller set may be formed with an escape portion for passing the material to a different position from the forming portion.
- the cover portion may be formed on the opposite side of the molding portion, it may be formed concave radially inward from the outer peripheral surface of the roller.
- the present invention comprises a plurality of molding steps for molding the continuously supplied material through a stamping structure formed on the outer surface of the roller set; And a cutting step of cutting the molded material, wherein the part of the material is changed from the first shape to the second shape by passing the plurality of molding steps, wherein the plurality of molding steps include the first material.
- a roll stamping method comprising a reforming molding step opposite to a deformation direction of deforming from a shape to a second shape.
- the reforming molding step may re-deform both longitudinal ends of the molding part of the material.
- the reforming molding step may be performed in the final molding step.
- a plurality of molding steps can be performed again after the bypass step
- the ratio of the feed rate of the material and the rotational speed of the roller set may be different from each other in the forming step and the bypass step.
- the roll stamping apparatus and method of the present invention can reduce the shape defect by solving the residual stress of the cross-sectional change portion and the force imbalance between the cross-sectional change portion.
- FIG. 1 is a view showing a conventional roll stamping apparatus.
- FIG. 2 is a plan view of a product manufactured by a conventional roll stamping apparatus.
- FIG. 3 is a view showing a roll stamping apparatus of the present invention.
- FIG. 4 is a step-by-step top view of a product produced by the roll stamping apparatus of the present invention.
- FIG. 5 is a plan view showing the final shape of the product by the roll stamping apparatus of the present invention and the product shape molded in the overmolded roller set.
- Fig. 6 is a plan view showing the final shape of the product by the roll stamping apparatus of the present invention and another product shape formed in the overmolded roller set.
- FIG. 7 is a photograph of a product molded by a conventional roll stamping apparatus and a product molded by the roll stamping apparatus of the present invention.
- FIGS. 8 and 9 are side views of the article formed by the roll stamping apparatus of FIGS. 8 and 9.
- roller set 50 over deformation roller set
- FIG. 1 and 2 show a conventional roll stamping device and a product molded thereby.
- a plurality of roller sets 10, 20, 30, and 40 are disposed along a material traveling direction, and each roller set 10, 20, 30, and 40 has an upper roll ( 10a) and a lower roll 10b. Molding portions 11a and 11b are formed in each of the rolls 10a and 10b to form a raw material.
- Each roller set 10, 20, 30, 40 includes a molded part, and as shown in FIG. 1, the molded part is sequentially changed along the advancing direction of the raw material, so that a part of the raw material is changed from the first shape to the first shape before molding. It is shape
- the product molded by such a roll stamping device has a transition portion (T1, T2) which is formed by a portion having a first shape (section AA, CC) and a portion having a second shape (section BB). Include.
- Such transition parts T1 and T2 have residual stresses in opposite directions and have a problem of being cut into a product or warping before being cut.
- the present invention is intended to reduce the shape defects of the product by removing residual stress or at least distorting in the transition portion, and FIG. 3 shows a roll stamping apparatus of the present invention for achieving this object.
- the roll stamping apparatus of the present invention is a roller set (10, 20, 40, 50), which rotates while facing each other to press the both sides of the material (S) to be continuously supplied to advance between the molding, forming the material And a molding part 11a, 11b, 41a, 41b, 51a, 51b having a stamping structure applied to an outer surface of the roller set 10, 20, 40, 50, and the roller set 10, 20, 40, 50 ) Is arranged along the direction of the material progress, each forming portion of the roller set is formed so as to sequentially change the cross-section of the material in accordance with the progress of the material, before the final roller set 40 through which the material finally passes
- the forming portions 51a, 51b of at least one roller set 50 of the roller sets are overmolded roller sets 40 having a longer circumferential length than the forming portions 41a, 41b of the final roller set 40. .
- FIG. 4 is a step-by-step plan view of the material formed by the roll stamping apparatus of FIG. 3, FIG. 4A is a plan view of the material formed by the roller set 10 of FIG. 3, and FIG. 4B is FIG. 3.
- 4 (c) is a plan view of a material formed by the overmolded roller set 50 of FIG. 3
- FIG. 4 (d) is a final view of the material formed by the roller set 20 of FIG. It is a top view of the raw material shape
- FIG. 4 is a step-by-step plan view of the material formed by the roll stamping apparatus of FIG. 3
- FIG. 4A is a plan view of the material formed by the roller set 10 of FIG. 3
- FIG. 4B is FIG. 3.
- 4 (c) is a plan view of a material formed by the overmolded roller set 50 of FIG. 3
- FIG. 4 (d) is a final view of the material formed by the roller set 20 of FIG. It is a top view of the raw
- the shape of the material or the number of the roller set is exemplary, the number of the roller set may be increased or decreased as necessary, and the shape of the material may have a shape corresponding to the desired product.
- Figure 4 (a) to (d) it is shown that the material before molding has the same width, but it is also possible to cut the width of the material before roll stamping.
- FIG. 4 (a) is a plan view of the material passing through the first roller set 10, wherein some regions 101, 102, 103 of the material having the hat-shaped cross section were formed. Transition portions 102 and 103 are formed between the unformed region and the flat portion 101 with the flat portion 101 having a flat outer surface in the planar shape among the molded regions.
- the flat portion 101 of FIG. 4 (a) refers to a region having the same cross section in the advancing direction of the material regardless of whether the cross section is flat, and the transition parts 102 and 103 are regions in which the cross section changes along the advancing direction of the material. Means.
- FIG. 4 (d) is a plan view of a raw material having the desired second shape after passing through the overmolded roller set 50 and then through the final roller set 40.
- the material forming area in which the length L4 of the material forming area passes through the overmolding roller set is shown. Is smaller than the length L3 (L3 ⁇ L4). Accordingly, the transition portions 102 and 103 in which the cross-section of the material changes from the first shape to the second shape in FIG. 4 (d), and the return parts 105 and 106 that are transition parts in the previous roller set and then return to the first shape. Is formed in the reverse direction in the direction of deformation from the first shape to the second shape (hatched part in Fig. 4 (d)).
- transition parts 102 and 103 and the return parts 105 and 106 of the material are formed in the reverse direction with respect to the residual stress direction formed by molding from the first shape to the second shape, thereby reducing the residual stress of the final product. can do.
- FIGS. 4A and 4D only one set of the overmolded roller set 50 is disposed immediately before the final roller set 40, but the present invention is not limited thereto, and the plurality of rollers before the final roller set 40 are not limited thereto.
- the set may consist of an overmolded roller set 50.
- the overmolded roller set 50 includes not only the case where the length in the longitudinal direction of the material, that is, the circumferential direction of the roll is longer than the circumferential length of the molding portion of the final roller set, but also the degree of forming is the shaping of the final roller set. It is larger than the degree of negative molding and changes from the reverse direction (not changing from the first shape to the second shape, to the third shape that is beyond the second shape) to become the second shape that is the target shape, and then to the second shape. To change).
- the roll stamping apparatus of the present invention can also be applied by a roll stamping method corresponding thereto. Since the warpage of the material becomes more problematic when the material is cut, the roll stamping method of the present invention is a plurality of forming the continuously supplied material through a stamping structure formed on the outer surface of the roller set (10, 20, 40, 50) And a cutting step of cutting the formed material, wherein the material is partially changed from a first shape to a second shape by passing through the plurality of forming steps, wherein the plurality of forming steps include the material And a reverse deformation forming step (passing the final roller set 40 after passing the overmolding roller set 50) opposite to the deformation direction of deforming from the first shape to the second shape.
- the molding is made in the deformation direction deforming from the first shape to the second shape again after the reverse deformation molding step, since the residual stresses may increase in the opposite directions in the transition parts 102 and 103 as in the prior art, distortion may occur.
- the residual stress of the transition parts 102 and 103 can be reduced by increasing or decreasing the length of the molded part, it is also possible to reduce the residual stress by changing the shape of the molded part. For example, it is also possible to reduce the residual stress in the transitions 102, 103 by having the reverse bending be performed at the transitions 102, 103 in the final forming step.
- 5 and 6 show plan views showing the final shape of the product by the roll stamping device of the present invention and the shape of the material to be molded in the overmolded roller set, respectively.
- the forming region length L2 of the second roller set is shorter than the forming region length L3 of the overmolded roller set (L2 ⁇ L3).
- the lengths of the lengths L2a and L3a are as long as the flat portion 101 of the overmolded roller set is as long as the forming region is longer (L3a> L2a). That is, the overmolded roller set forms the material in such a manner that the length of the entire forming area is increased by increasing the length of the flat portion 101 without changing the shape of the transition parts 102 and 103.
- the transition from the final roller set 40 back to the target molding length (L4), the transition portion (102, 103) is moved again, the reverse molding occurs in the process.
- the length of the lengths L2b and L3b is the sum of the lengths of the transition parts 102 and 103 of the overmolded roller set as long as the molding area is longer ( ⁇ L3a> ⁇ L2a).
- the overmolded roller set forms the material by increasing the length of the transition parts 102 and 103 without changing the shape of the flat part 101, thereby increasing the length of the entire forming area. Returning to the target molding length L4 in the roller set 40, a portion of the transition portions 102, 103 become return portions 105, 106 (see FIG. 4), and in the process, inverse molding occurs. .
- FIG. 7A shows a photograph of a material formed by a conventional roll stamping apparatus. As shown in FIG. 7A, the material is not attached to the floor and is distorted. That is, in the case of forming the material by the conventional roll stamping apparatus, distortion occurs in the material due to residual stresses in opposite directions in the plurality of transition portions.
- Figure 7 (b) shows a picture of the material formed by the roll stamping apparatus according to the present invention. As shown in Figure 7 (b), by forming a material by the roll stamping apparatus according to the present invention it can be seen that the material is attached to the floor without distortion.
- roller sets 10, 20, 40, and 50 having the same molding as the embodiment shown in FIG. 3, but roller sets 10, 20, 40, and 50 are each formed There is a difference in having the skin portions 15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b on the side opposite to the portion.
- the cover portions 15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b are formed concave inwardly from the circumference of the roll, and the molded portions 11a, 11b, 41a, 41b, 51a, 51b. Is formed on the opposite side.
- the roller sets 10, 20, 40, and 50 are arranged so that the escape portions 15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b of both rollers face each other as the roll is rotated.
- the material S passing through the roller sets 10, 20, 40, and 50 may pass without any molding. Since the skin 15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b is formed in a certain area at the outer circumference of the roller, the molding may not be performed in a certain section in the rotation of the roller.
- the roller sets 10, 20, 40, and 50 are formed together with the forming portions 11a, 11b, 41a, 41b, 51a, 51b and the skin portions 15a, 15b, 25a, 25b, 45a, 45b, 55a, Since 55b) is formed, the raw material S is molded in a certain section, and the raw material S can be bypassed in a certain section.
- escape parts 15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b face each other, they do not contact the roller sets 10, 20, 40, 50 and the material S. S) can be moved faster than during molding, and thus, even when the interval between the sections L4 and L6 to be molded (see FIG. 10) is changed, the molding can be performed without changing the roller set.
- the roller sets 10, 20, 40, and 50 shows a material S shaped according to the embodiment of FIGS. 8 and 9.
- the rotation speed (rev / min) of the roller sets 10, 20, 40, and 50 is constant during molding. Slower or faster rotational speed of the roller sets 10, 20, 40, 50 when unmolded, especially when the skin 15a, 15b, 25a, 25b, 45a, 45b, 55a, 55b is facing.
- the lengths of the non-molding sections L5 and L7 can be adjusted.
Abstract
Description
Claims (16)
- 연속적으로 공급되는 소재 양면을 압박하여 사이로 진행시키도록 서로 마주보면서 회전하는 롤러 세트, 상기 소재를 성형하도록 상기 롤러 세트의 외면에 스탬핑 구조가 적용된 성형부를 포함하며,상기 롤러 세트는 소재 진행방향을 따라서 복수 개가 배치되며,상기 롤러 세트의 각 성형부는 소재의 진행에 따라서 소재의 단면을 순차적으로 변화시키도록 형성되되,소재가 마지막으로 통과하는 최종 롤러 세트 이전의 롤러 세트 중 적어도 한 롤러 세트의 성형부는 상기 최종 롤러 세트의 성형부보다 원주 방향의 길이가 더 긴 과성형 롤러 세트인 롤 스탬핑 장치.
- 제 1 항에 있어서,상기 과성형 롤러 세트는 상기 최종 롤러 세트로부터 적어도 3개 이내에 배치되는 것을 특징으로 하는 롤 스탬핑 장치.
- 제 1 항 또는 제 2 항에 있어서,상기 성형부는상기 롤러 세트 중 하나의 회전롤의 외면에 양측이 개방된 음각과, 나머지 하나의 회전롤의 외면에 상기 음각과 대응되는 양각으로 구성되는 것을 특징으로 하는 롤 스탬핑 장치.
- 제 3 항에 있어서,상기 롤러 세트의 성형부는 소재의 진행에 따라서 소재의 단면에 순차적으로 요철부를 형성하거나 요철부를 제거하여 평탄화시키도록 형성되는 것을 특징으로 하는 롤 스탬핑 장치.
- 제 1 항 또는 제 2 항에 있어서,상기 롤러 세트의 성형부는 순차적으로 소재 단면의 요철부를 제거하여 평탄화시키도록 형성되며,상기 최종 롤러 세트 및 과성형 롤러 세트의 성형부는 폭방향으로 평탄하며, 원주방향으로 일정 길이를 가지는 평탄부와 원주 방향에서 상기 평탄부를 중심으로 양측에 위치하는 천이부를 포함하며,상기 과성형 롤러 세트의 평탄부의 원주 방향 길이가, 상기 최종 롤러 세트의 평탄부의 원주 방향 길이 보다 긴 것을 특징으로 하는 롤 스탬핑 장치.
- 제 1 항 또는 제 2 항에 있어서,상기 과성형 롤러 세트의 성형부는 폭방향으로 평탄하며 원주방향으로 일정 길이를 가지는 평탄부와 원주 방향에서 상기 평탄부를 중심으로 양측에 위치하는 천이부를 포함하며,상기 과성형 롤러 세트의 천이부의 원주 방향 길이가, 상기 최종 롤러 세트의 천이부의 원주 방향 길이 보다 긴 것을 특징으로 하는 롤 스탬핑 장치.
- 제 1 항에 있어서,상기 롤러 세트의 외면에는 상기 성형부와 다른 위치에 소재를 통과시키는 도피부가 형성되는 것을 특징으로 하는 롤 스템핑 장치.
- 제 7 항에 있어서,상기 도피부는 성형부의 반대측에 형성되는 것을 특징으로 하는 롤 스탬핑 장치.
- 제 8 항에 있어서,상기 도피부는 롤러의 외주면으로부터 반경 방향 내측으로 오목하게 형성되는 것을 특징으로 하는 롤 스탬핑 장치.
- 연속적으로 공급되는 소재를 롤러 세트의 외면에 형성된 스탬핑 구조를 통하여 성형시키는 복수의 성형 단계; 및상기 성형된 소재를 절단하는 절단 단계를 포함하며,상기 복수의 성형 단계를 통과함으로써, 상기 소재는 일부분이 제 1 형상에서 제 2 형상으로 변화되되,상기 복수의 성형 단계는 상기 소재가 제 1 형상에서 제 2 형상으로 변형하는 변형 방향과 반대인 역변형 성형 단계를 포함하는 것을 특징으로 하는 롤 스탬핑 방법.
- 제 10 항에 있어서,상기 역변형 성형 단계에서는 적어도 소재의 성형부의 길이방향 양단부를 역변형시키는 것을 특징으로 하는 롤 스탬핑 방법.
- 제 10 항에 있어서,상기 역변형 성형 단계는 전체 성형 단계 중 중간 이후에 수행되는 것을 특징으로 하는 롤 스탬핑 방법.
- 제 10 항에 있어서,상기 역변형 성형 단계 전에, 소재의 성형부를 목표 성형부보다 길게 성형하여, 상기 역변형 성형 단계에서 상기 양단부를 역변형시키는 것을 특징으로 하는 롤 스탬핑 방법.
- 제 11 항에 있어서,상기 역변형 성형 단계 전에 소재의 성형부를 제 2 형상을 넘어서게 성형하여, 상기 역변형 성형 단계에서 소재의 성형부를 제 2 형상으로 역성형하는 것을 특징으로 하는 롤 스탬핑 방법.
- 제 10 항에 있어서,상기 복수의 성형 단계 이후에, 롤러 세트에 형성된 도피부로 소재를 바이패스 통과시키는 바이패스 단계를 더 포함하며,상기 바이패스 단계 이후에 재차 복수의 성형 단계가 수행되는 것을 특징으로 하는 롤 스탬핑 방법.
- 제 15 항에 있어서,소재의 공급속도와 롤러 세트의 회전 속도의 비는 상기 성형 단계와 상기 바이패스 단계에서 서로 상이한 것을 특징으로 하는 롤 스탬핑 방법.
Priority Applications (5)
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US16/065,748 US11358200B2 (en) | 2015-12-23 | 2016-12-21 | Roll stamping apparatus and method |
CN201680075672.6A CN108430663B (zh) | 2015-12-23 | 2016-12-21 | 辊冲压装置及方法 |
EP16879345.3A EP3395466B1 (en) | 2015-12-23 | 2016-12-21 | Roll stamping apparatus |
JP2018532633A JP6678241B2 (ja) | 2015-12-23 | 2016-12-21 | ロールスタンピング装置及び方法 |
US17/752,459 US11571729B2 (en) | 2015-12-23 | 2022-05-24 | Roll stamping apparatus and method |
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KR1020150185116A KR101786260B1 (ko) | 2015-12-23 | 2015-12-23 | 롤 스탬핑 장치 |
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US16/065,748 A-371-Of-International US11358200B2 (en) | 2015-12-23 | 2016-12-21 | Roll stamping apparatus and method |
US17/752,459 Division US11571729B2 (en) | 2015-12-23 | 2022-05-24 | Roll stamping apparatus and method |
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EP3395466A1 (en) | 2018-10-31 |
JP6678241B2 (ja) | 2020-04-08 |
EP3395466B1 (en) | 2021-06-23 |
KR20170075880A (ko) | 2017-07-04 |
JP2019503869A (ja) | 2019-02-14 |
EP3395466A4 (en) | 2019-05-08 |
US11358200B2 (en) | 2022-06-14 |
CN108430663B (zh) | 2020-07-28 |
US20190009319A1 (en) | 2019-01-10 |
KR101786260B1 (ko) | 2017-10-18 |
US11571729B2 (en) | 2023-02-07 |
US20220331852A1 (en) | 2022-10-20 |
CN108430663A (zh) | 2018-08-21 |
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