EP1854563A1 - Method for producing die for press brake and die - Google Patents
Method for producing die for press brake and die Download PDFInfo
- Publication number
- EP1854563A1 EP1854563A1 EP06405206A EP06405206A EP1854563A1 EP 1854563 A1 EP1854563 A1 EP 1854563A1 EP 06405206 A EP06405206 A EP 06405206A EP 06405206 A EP06405206 A EP 06405206A EP 1854563 A1 EP1854563 A1 EP 1854563A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- die
- press brake
- elements
- laser beam
- beam machining
- 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.)
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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
- B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
-
- 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
- B21D37/20—Making tools by operations not covered by a single other subclass
Definitions
- the present invention relates to a die for press brake having a construction in which many flat plate-shaped die elements are laminated.
- FIG. 9(A) shows a general die for press brake.
- the die for press brake generally denoted by reference numeral 1 has an upper die 2 and a lower die 3.
- a bending blade 2a is formed, and in the upper line portion of the lower die 3, a V-groove 3a is formed.
- Patent Document 1 Japanese Patent Laid-Open Publication No. 2000-140941
- Patent Document 2 Japanese Patent Laid-Open Publication No. 2001-205338
- Patent Document 3 Japanese Patent Laid-Open Publication No. 2001-1048
- the curved portion B 1 is a collection of straight-line bend portions, and a continuous curved surface cannot be formed.
- An object of the present invention is to provide a die for press brake in which a curved surface having a continuously changing radius of curvature can be formed by one pressing operation.
- a method for producing a die for press brake which is formed by an upper die and a lower die includes as fundamental means the steps of preparing three-dimensional CAD data for a product to be bent; preparing three-dimensional CAD data corresponding to shapes of the upper die and the lower die for press brake based on the three-dimensional CAD data for the product; dividing the die into plate-shaped die elements having a uniform thickness based on the three-dimensional CAD data for the die; preparing a laser beam machining program for each divided die element; manufacturing each die element by subjecting a raw material to laser beam machining by using the machining program; and producing the die by assembling the die elements.
- the die for press brake has plate-shaped die elements having a uniform thickness, each die element is fabricated into a predetermined shape by three-dimensional laser beam machining; and a fastening member for fastening all of the die elements is provided.
- the die is made up of the plate-shaped die elements, and each of the plate-shaped die elements is formed by three-dimensional laser beam machining. Therefore, a die corresponding to a case where the radius of curvature and the shape defined on a plane perpendicular to the lengthwise direction of the die for a press brake, which is a work, change or a case where the radius of curvature and the shape change continuously and linearly in the lengthwise direction of the die can be produced easily.
- FIG. 1 is an explanatory view showing the principle of the present invention.
- a work W 10 which is a product, shown in FIG. 1 (A) has a bend line B 10 such that the shape in the bending direction L 1 and the shape in the direction perpendicular to the bending direction change successively.
- a model of the work W 10 is prepared by three-dimensional CAD based on the data of the work.
- die models for an upper die (punch) 10 and a lower die (die) 20 are prepared by three-dimensional CAD using the model of the work W 10 as shown in FIG. 1 (B).
- the upper die 10 and the lower die 20 have a punch portion P 1 and a die portion D 1 , respectively, corresponding to the bend shape of the work W 10 .
- the three-dimensional model of the lower die 20 is sliced into many plate-shaped lower die elements 201, 202, 203, ... 20n, and an NC program for three-dimensional machining of each lower die element is prepared from the sliced model.
- the first lower die element 201 which is formed by a metallic sheet having a thickness T 1 , is cut out of a raw material by a three-dimensional laser beam machine.
- a first die portion 201 a is formed by laser beam machining.
- through holes 201 b that are used at the time of assembly are formed.
- the second lower die element 202 adjacent to the first lower die element 201 has a thickness T 1 likewise, and is formed by laser beam machining.
- the second lower die element 202 has a second die portion 202a.
- This lower die element 202 is also formed with through holes 202b for assembly.
- FIG. 2 shows a state in which the lower die elements fabricated in the above-described process are assembled by using fastening members F 1 such as bolts and nuts to complete the lower die 20.
- This lower die 20 has a required die portion D 1 .
- the upper die 10 is also fabricated by the same process.
- FIG. 3 shows a configuration of a more practical die for press brake utilizing the principle of the present invention.
- the upper die 10 is made up of, for example, fifty of upper die elements 101, 102, ... 150.
- Each element is formed with a corresponding punch portion, and element numbers "01" to "50" are put on the elements by laser beam machining.
- the elements are arranged in the order of element number, by which the upper die 10 is assembled exactly and easily.
- the elements are fixed by the fastening members F 1 such as bolts and nuts.
- the lower die 20 is also made up of fifty lower die elements 201, 202, ... 250.
- the elements are arranged in the order of element number, and are fixed by the fastening members F 1 to complete the lower die 20.
- the upper die 10 and the lower die 20 have required punch portion P 1 and die portion D 1 , respectively.
- FIG. 4 is an explanatory view showing another example of the present invention.
- the upper die of this example is made up of the upper die elements 10n having a relatively small thickness. By decreasing the thicknesses of the upper die elements 10n, the shape of the punch portion of each element can be fabricated more accurately. In the case where such thin elements are used, thick support plates 11 and 12 are disposed especially in both end portions, and the elements are fixed by the fastening members F 1 .
- the upper die 10 having high rigidity can be obtained.
- the lower die 20 is also made up of the elements 20n having a small thickness. Thick support plates 21 and 22 are disposed in both end portions, and the elements are fixed by the fastening members F 1 .
- FIG. 5 shows a difference between the case where each element of the upper and lower dies is fabricated by a two-dimensional laser and the case where it is fabricated by a three-dimensional laser.
- FIG. 5(A) shows the case where each element 30n of an upper die 30 is fabricated by a two-dimensional laser.
- the surface of a punch portion 30nP of each element is machined into a cross-sectional shape at right angles to the plate surface of element.
- an element 40n of a lower die 40 is also fabricated by a two-dimensional laser.
- a die portion 40nD of the element 40n has a cross-sectional shape at right angles to the plate surface of element.
- FIG. 5(B) shows the case where an element 50n of an upper die 50 and an element 60n of a lower die 60 each are fabricated by a three-dimensional laser beam machine.
- a punch portion 50nP of the element 50n of the upper die 50 can be machined so as to have a cross-sectional shape with an arbitrary angle with respect to the plate surface of element.
- the punch portion of the upper die 50 formed by assembling the elements 50n forms a smooth face.
- the element 60n of the lower die 60 is subjected to three-dimensional laser beam machining. Therefore, the die portion of the lower die 60 is also formed so as to have a smooth face.
- FIG. 6 shows a state in which the die portion D 1 of a die element E is fabricated by using a laser beam machining tool TL of a three-dimensional laser beam machining head LH.
- FIG. 7 shows a state in which an element number is put on the side face of the die element E with an opposing laser beam machining head TL of a three-dimensional laser beam machining head LH.
- FIG. 8 is a perspective view showing an example of a work formed by the die for press brake in accordance with the present invention.
- a work W 30 has a shape such that the radius of curvature changes successively from r 1 to r n along the bend line.
Abstract
Description
- The present invention relates to a die for press brake having a construction in which many flat plate-shaped die elements are laminated.
- FIG. 9(A) shows a general die for press brake. The die for press brake generally denoted by reference numeral 1 has an
upper die 2 and alower die 3. - In the lower line portion of the
upper die 2, abending blade 2a is formed, and in the upper line portion of thelower die 3, a V-groove 3a is formed. - When a work W1, which is a product, is bent, a raw material is held between the
upper die 2 and thelower die 3, and pressing is performed, as shown in FIG. 9(B). - Such a die for press brake has been disclosed, for example, in
Japanese Patent Laid-Open Publication No. 2000-140941 - Also, a construction in which the die for press brake is divided has been disclosed in
Japanese Patent Laid-Open Publication No. 2001-205338 Japanese Patent Laid-Open Publication No. 2001-1048 - When the above-described conventional die for press brake is used to bend a work having a curved portion B1 in which the radius of curvature changes continuously from a curved portion R1 having a small radius of curvature to a curved portion R2 having a large radius of curvature as in the case of a work W2 shown in FIG. 10, a plurality of bending operations performed along a plurality of bend lines ML must be repeated.
- However, even if the above-described bending operations are performed a plurality of times, the curved portion B1 is a collection of straight-line bend portions, and a continuous curved surface cannot be formed.
- An object of the present invention is to provide a die for press brake in which a curved surface having a continuously changing radius of curvature can be formed by one pressing operation.
- A method for producing a die for press brake which is formed by an upper die and a lower die includes as fundamental means the steps of preparing three-dimensional CAD data for a product to be bent; preparing three-dimensional CAD data corresponding to shapes of the upper die and the lower die for press brake based on the three-dimensional CAD data for the product; dividing the die into plate-shaped die elements having a uniform thickness based on the three-dimensional CAD data for the die; preparing a laser beam machining program for each divided die element; manufacturing each die element by subjecting a raw material to laser beam machining by using the machining program; and producing the die by assembling the die elements.
- Also, the die for press brake has plate-shaped die elements having a uniform thickness, each die element is fabricated into a predetermined shape by three-dimensional laser beam machining; and a fastening member for fastening all of the die elements is provided.
- According to the present invention, the die is made up of the plate-shaped die elements, and each of the plate-shaped die elements is formed by three-dimensional laser beam machining. Therefore, a die corresponding to a case where the radius of curvature and the shape defined on a plane perpendicular to the lengthwise direction of the die for a press brake, which is a work, change or a case where the radius of curvature and the shape change continuously and linearly in the lengthwise direction of the die can be produced easily.
-
- FIG. 1 is an explanatory view showing the principle of the present invention;
- FIG. 2 is an explanatory view showing an assembly of die in accordance with the present invention;
- FIG. 3 is an explanatory view showing a configuration of a practical die for press brake utilizing the principle of the present invention;
- FIG. 4 is an explanatory view showing another example of the present invention;
- FIG. 5 is an explanatory view showing a difference between the case where each element of an upper and lower dies is fabricated by a two-dimensional laser and the case where it is fabricated by a three-dimensional laser;
- FIG. 6 is an explanatory view showing laser beam machining of a die portion of a die element;
- FIG. 7 is an explanatory view showing laser beam machining of a side portion of a die element;
- FIG. 8 is a perspective view showing an example of a work fabricated by the present invention;
- FIG. 9 is an explanatory view of a conventional die; and
- FIG. 10 is an explanatory view of a bending operation using a conventional die.
- FIG. 1 is an explanatory view showing the principle of the present invention. A work W10, which is a product, shown in FIG. 1 (A) has a bend line B10 such that the shape in the bending direction L1 and the shape in the direction perpendicular to the bending direction change successively.
- First, a model of the work W10 is prepared by three-dimensional CAD based on the data of the work.
- Next, die models for an upper die (punch) 10 and a lower die (die) 20 are prepared by three-dimensional CAD using the model of the work W10 as shown in FIG. 1 (B).
- The
upper die 10 and thelower die 20 have a punch portion P1 and a die portion D1, respectively, corresponding to the bend shape of the work W10. - Subsequently, as shown in FIG. 1(C), the three-dimensional model of the
lower die 20 is sliced into many plate-shapedlower die elements lower die element 201, which is formed by a metallic sheet having a thickness T1, is cut out of a raw material by a three-dimensional laser beam machine. For this firstlower die element 201, afirst die portion 201 a is formed by laser beam machining. - Also, in the first
lower die element 201, throughholes 201 b that are used at the time of assembly are formed. - The second
lower die element 202 adjacent to the firstlower die element 201 has a thickness T1 likewise, and is formed by laser beam machining. The second lower dieelement 202 has asecond die portion 202a. - This
lower die element 202 is also formed with throughholes 202b for assembly. - Hereunder, a necessary number of lower die elements are fabricated by laser beam machining.
- FIG. 2 shows a state in which the lower die elements fabricated in the above-described process are assembled by using fastening members F1 such as bolts and nuts to complete the
lower die 20. - This lower die 20 has a required die portion D1. The
upper die 10 is also fabricated by the same process. - FIG. 3 shows a configuration of a more practical die for press brake utilizing the principle of the present invention.
- The
upper die 10 is made up of, for example, fifty ofupper die elements - Each element is formed with a corresponding punch portion, and element numbers "01" to "50" are put on the elements by laser beam machining.
- When the
upper die 10 is assembled, the elements are arranged in the order of element number, by which theupper die 10 is assembled exactly and easily. The elements are fixed by the fastening members F1 such as bolts and nuts. - In the same way, the
lower die 20 is also made up of fiftylower die elements - On the lower die elements, element numbers "01" to "50" are put by laser beam machining.
- The elements are arranged in the order of element number, and are fixed by the fastening members F1 to complete the
lower die 20. - The
upper die 10 and thelower die 20 have required punch portion P1 and die portion D1, respectively. - FIG. 4 is an explanatory view showing another example of the present invention.
- The upper die of this example is made up of the
upper die elements 10n having a relatively small thickness. By decreasing the thicknesses of theupper die elements 10n, the shape of the punch portion of each element can be fabricated more accurately. In the case where such thin elements are used,thick support plates - By this construction, the
upper die 10 having high rigidity can be obtained. - Similarly, the
lower die 20 is also made up of theelements 20n having a small thickness.Thick support plates - FIG. 5 shows a difference between the case where each element of the upper and lower dies is fabricated by a two-dimensional laser and the case where it is fabricated by a three-dimensional laser.
- FIG. 5(A) shows the case where each
element 30n of anupper die 30 is fabricated by a two-dimensional laser. - The surface of a punch portion 30nP of each element is machined into a cross-sectional shape at right angles to the plate surface of element.
- Similarly, an
element 40n of alower die 40 is also fabricated by a two-dimensional laser. A die portion 40nD of theelement 40n has a cross-sectional shape at right angles to the plate surface of element. - When a work W20 is pressed by using the
upper die 30 and thelower die 40, the work W20 is bent along the shape of the die. This fabricated shape is approximate to the required shape. However, since a difference in level is produced between the adjacent elements, there arises a drawback in that a flaw is induced on the surface of the work W20 by this difference in level. - FIG. 5(B) shows the case where an
element 50n of anupper die 50 and anelement 60n of alower die 60 each are fabricated by a three-dimensional laser beam machine. - A punch portion 50nP of the
element 50n of theupper die 50 can be machined so as to have a cross-sectional shape with an arbitrary angle with respect to the plate surface of element. - Therefore, no difference in level is produced in the adjoining portion of the
elements 50n. For this reason, the punch portion of theupper die 50 formed by assembling theelements 50n forms a smooth face. - Similarly, the
element 60n of thelower die 60 is subjected to three-dimensional laser beam machining. Therefore, the die portion of thelower die 60 is also formed so as to have a smooth face. - When a work W21 is pressed by using the
upper die 50 and thelower die 60, no flaw is induced on the fabricated surface of the work W21. - FIG. 6 shows a state in which the die portion D1 of a die element E is fabricated by using a laser beam machining tool TL of a three-dimensional laser beam machining head LH.
- FIG. 7 shows a state in which an element number is put on the side face of the die element E with an opposing laser beam machining head TL of a three-dimensional laser beam machining head LH.
- FIG. 8 is a perspective view showing an example of a work formed by the die for press brake in accordance with the present invention.
- A work W30 has a shape such that the radius of curvature changes successively from r1 to rn along the bend line.
- In addition, according to the present invention, a work having an intricate shape can be fabricated.
Claims (6)
- A method for producing a die for press brake which is formed by an upper die and a lower die, comprising the steps of:preparing three-dimensional CAD data for a product to be bent;preparing three-dimensional CAD data corresponding to shapes of the upper die and the lower die for press brake based on the three-dimensional CAD data for the product;dividing the die into plate-shaped die elements having a uniform thickness based on the three-dimensional CAD data for the die;preparing a laser beam machining program for each divided die element;manufacturing each die element by subjecting a raw material to laser beam machining by using the machining program; andproducing the die by assembling the die elements.
- The method for producing a die for press brake according to claim 1, wherein a die face of each die element is fabricated into a cross-sectional shape having an arbitrary angle with respect to a plate surface.
- The method for producing a die for press brake according to claim 1, wherein the method further comprises a step of putting an element number on each die element by laser beam machining.
- A die for press brake, which is produced based on three-dimensional CAD data for a product to be bent, whereinthe die has plate-shaped die elements having a uniform thickness;each die element is fabricated into a predetermined shape by three-dimensional laser beam machining; anda fastening member for fastening all of the die elements is provided.
- The die for press brake according to claim 4, wherein a die face of each die element is fabricated into a cross-sectional shape having an arbitrary angle with respect to a plate surface.
- The die for press brake according to claim 4, wherein each die element has an element number put by laser beam machining.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06405206A EP1854563A1 (en) | 2006-05-12 | 2006-05-12 | Method for producing die for press brake and die |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP06405206A EP1854563A1 (en) | 2006-05-12 | 2006-05-12 | Method for producing die for press brake and die |
Publications (1)
Publication Number | Publication Date |
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EP1854563A1 true EP1854563A1 (en) | 2007-11-14 |
Family
ID=37307169
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06405206A Withdrawn EP1854563A1 (en) | 2006-05-12 | 2006-05-12 | Method for producing die for press brake and die |
Country Status (1)
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EP (1) | EP1854563A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT512191B1 (en) * | 2012-03-21 | 2013-06-15 | Trumpf Maschinen Austria Gmbh | Bending machine |
CN103722055A (en) * | 2013-12-10 | 2014-04-16 | 龙口市丛林铝合金船舶有限公司 | Bow bending tool system and method |
CN109676019A (en) * | 2019-01-17 | 2019-04-26 | 惠州市普盈金属科技有限公司 | A kind of non-targeted automation centipede molding equipment for hardware plate forming |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3474657A (en) * | 1966-04-26 | 1969-10-28 | Raymond J Spiegel | Laminated press brake die |
JPH02229621A (en) * | 1989-03-01 | 1990-09-12 | Kyodo Kumiai F I T | Laminated die for press brake |
US5878619A (en) * | 1998-02-09 | 1999-03-09 | Walczak; Kenneth H. | Laminated punch and die assemblies |
JP2001205338A (en) * | 2000-01-27 | 2001-07-31 | Amada Co Ltd | Method and apparatus for split die layout for press brake |
GB2392861A (en) * | 2002-09-16 | 2004-03-17 | Truflo Air Movement Ltd | Press Tool |
-
2006
- 2006-05-12 EP EP06405206A patent/EP1854563A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3474657A (en) * | 1966-04-26 | 1969-10-28 | Raymond J Spiegel | Laminated press brake die |
JPH02229621A (en) * | 1989-03-01 | 1990-09-12 | Kyodo Kumiai F I T | Laminated die for press brake |
US5878619A (en) * | 1998-02-09 | 1999-03-09 | Walczak; Kenneth H. | Laminated punch and die assemblies |
JP2001205338A (en) * | 2000-01-27 | 2001-07-31 | Amada Co Ltd | Method and apparatus for split die layout for press brake |
GB2392861A (en) * | 2002-09-16 | 2004-03-17 | Truflo Air Movement Ltd | Press Tool |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT512191B1 (en) * | 2012-03-21 | 2013-06-15 | Trumpf Maschinen Austria Gmbh | Bending machine |
AT512191A4 (en) * | 2012-03-21 | 2013-06-15 | Trumpf Maschinen Austria Gmbh | Bending machine |
CN103722055A (en) * | 2013-12-10 | 2014-04-16 | 龙口市丛林铝合金船舶有限公司 | Bow bending tool system and method |
CN103722055B (en) * | 2013-12-10 | 2016-08-17 | 山东丛林凯瓦铝合金船舶有限公司 | A kind of bow bending tool system and method |
CN109676019A (en) * | 2019-01-17 | 2019-04-26 | 惠州市普盈金属科技有限公司 | A kind of non-targeted automation centipede molding equipment for hardware plate forming |
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