CN102015144A - A pressing tool - Google Patents

A pressing tool Download PDF

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Publication number
CN102015144A
CN102015144A CN2009801097482A CN200980109748A CN102015144A CN 102015144 A CN102015144 A CN 102015144A CN 2009801097482 A CN2009801097482 A CN 2009801097482A CN 200980109748 A CN200980109748 A CN 200980109748A CN 102015144 A CN102015144 A CN 102015144A
Authority
CN
China
Prior art keywords
convex
tool
angle
modular unit
stamping tool
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.)
Pending
Application number
CN2009801097482A
Other languages
Chinese (zh)
Inventor
真纳罗·因迪韦里
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.)
ANDREW WIRELESS SOLUTIONS AFRI
Original Assignee
ANDREW WIRELESS SOLUTIONS AFRI
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
Priority to ZA2008/2534 priority Critical
Priority to ZA200802534 priority
Application filed by ANDREW WIRELESS SOLUTIONS AFRI filed Critical ANDREW WIRELESS SOLUTIONS AFRI
Priority to PCT/ZA2009/000026 priority patent/WO2009117748A2/en
Publication of CN102015144A publication Critical patent/CN102015144A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D5/00Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0209Tools therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/02Die constructions enabling assembly of the die parts in different ways

Abstract

A pressing tool (10) for forming at least a portion of an angle section beam includes a male member (12) presenting a first tool surface (14) for in use receiving at least a portion of the angle section beam thereon. The first tool surface (14) has two inclined surfaces 16.1 and 16.2 defining an angle a of less than ninety degrees between them. The tool 10 further includes a female member 18 presenting a second tool surface (20) complementary in shape to the first tool surface (14) for in use engaging the angle section beam located on the male member (12). The male and female members (12) and (18) are composed of modular units (22) and (24) respectively so as to permit their length, and thereby the portion of the angle section beam to be formed, to be varied.

Description

Stamping tool
Technical field
The present invention relates to make the field of the parts be used to make up communication mast (communication mast), communication mast is to be used for carrying mast or the tower that is used for phone, radar, wireless communication equipment and other sender unit, transmitting device, guider and sniffer.This mast can be used for other purpose, for example is used for lighting mast and illumination mast, range light, power transmission line and telephone wire.
Background technology
Mobile telephone system needs a large amount of masts to come the long wave radio signal of relaying with horizon communication, and each mast is set up a zone or honeycomb, and therefore mobile phone also is called as " cell phone ".Although whether mast is economical all is important for any application, the economy of the mast in the above-mentioned application is particularly important.The Consideration of Economic Importance is: the total amount of the normally used structural steel of mast, and " (footprint) takes up room ", promptly by mast and with the floor area of the occupied ground of mast associated device.Therefore as can significantly reduce and take up room in the specific region, the shared cost of land area is very big,, just can realize cost savings.
The consideration of these factors has caused reducing the coming out of steamer of design of the tripodia mast that takes up room of used structural steel and mast.90 ° of dihedrals from standard become 60 ° of angles to the angle beam of the structural steel by will being used to constitute tower leg in the position that connects strain component, have improved this design significantly.
The benefit of this design has only by overcoming a difficult problem that exists when making angle beam form about 60 ° expected angle and can be achieved, and the present invention then attempts to tackle this challenge.
In the following description book, term " angle beam " is interpreted as such connotation: have the roughly beam in L-shaped cross section, two legs of its central sill can be for isometric or not isometric.
Summary of the invention
According to the present invention, a kind of stamping tool that is used at least a portion of forming angle girder steel is provided, this instrument comprises:
The convex member, it has first tool surfaces, and described first tool surfaces is used for admitting in use at least a portion of angle beam thereon, and described first tool surfaces has two inclined surfaces, limits one between these two inclined surfaces less than 90 ° angle; And
The concavity member, it has second tool surfaces with the shape complementarity of described first tool surfaces, and described second surface is used for engaging in use the angle beam that is positioned on the convex member; Wherein convex member and concavity member are made up of modular unit, thereby the length of described convex member and concavity member can be changed, and the length of the part of formed angle beam can be changed.
The angle that is limited between two inclined surfaces of first tool surfaces is scheduled to, and this angle typically is about 60 °.Therefore, for 90 ° of angles of standard, will have the about 60 ° angle that is reduced between two legs of the part of the angle beam that the use stamping tool forms.
The modular unit of convex member can be triangular in shape form roughly, and wherein two of this gore sides limit this first tool surfaces.Each convex modular unit can have a preset thickness.
The convex member also can comprise along the knife-edge seamed edge of the top longitudinal extension of convex member, admits the apex zone of angle beam during use on this knife-edge seamed edge.Term " knife-edge seamed edge " should not be interpreted as having a sharp edge, and should be interpreted as forming with the interior apex zone of angle beam the fillet seamed edge of complementary fit.
The knife-edge seamed edge can be for being attached to the form of the longitudinal rod of convex member along the top of convex member.This bar can be located on a plurality of modular units with predetermined length, being adapted to the various quantity of convex modular unit and concavity modular unit, and is adapted to the various length of convex member and concavity member thus.
The modular unit of concavity member can limit two inclined surfaces with the inclined surface complementation of convex member.And the modular unit of each concavity member can have a predetermined thickness.
The convex member can be adapted to have the long angle beam of different legs with the concavity member, even is adapted to have the angle beam of not isometric leg, as long as these legs do not extend beyond first tool surfaces and second tool surfaces.
Can laterally extend a flange from the either side of the base regions of convex modular unit and concavity modular unit.
Convex member and concavity member can be separately positioned on first substrate and second substrate, and these substrates are mounted on the conventional metal stamping machine in use.
First substrate and second substrate can comprise first passage and second channel, and described first passage and second channel are used for admitting therein respectively the base regions of convex modular unit and concavity modular unit.
When the convex modular unit that will select quantity and concavity modular unit are placed in first passage and the second channel (this quantity depends on the length of angle beam to be formed), first carriage and second carriage can be arranged on the flange that extends from the either side of the base regions of these modular units, and be connected to first substrate and second substrate by suitable jockey (for example bolt).
Carriage can be set to have the modular unit of preset width, being adapted to the various quantity of convex modular unit and concavity modular unit, and is adapted to the various length of convex member and concavity member thus.
Convex modular unit and concavity modular unit can be provided with screwed hole, and when these modular units were admitted by first passage and second channel respectively, these screwed holes alignment were arranged.Threaded rod can be passed above-mentioned screwed hole and be fixed to said units by nuts and washers.
Thus, convex modular unit and concavity modular unit are fixed to first substrate and second substrate by carriage respectively, and in addition, the convex modular unit is connected by a bar, and the concavity modular unit is connected by at least one bar.
Stamping tool can be provided be in angle beam established part (promptly, partly that angle between two legs of this beam has reduced) and the transitional region between the zone on each side of above-mentioned established part (in this zone, the angle between two legs of this angle beam is about 90 °).
Have being positioned that the free end of first supporting member of inclined surface and second supporting member (limiting about 90 a ° angle between the described inclined surface) and convex member separates.Thus, define first transitional region and second transitional region between the free end of convex member and first and second supporting members, first, second supporting member also retrains angle beam by the angle that its two legs are maintained each other into about 90 ° in the process that forms angle beam.
In forming the process of angle beam, can be in the relation that separates with first supporting member and second supporting member and come to provide additional support by being configured to for angle beam away from first stabilizer and second stabilizer of convex member.It is conical that the shape of the upper area of first stabilizer and second stabilizer can be, so that it is easy to be positioned in the interior top of angle beam.
Can further be provided for adjusting the free end zone of angle beam and the spacing device (spacing device) of the distance between the convex member.This spacing device can comprise from the arm of the trough of belt of first substrate extension.Can substantially vertically extend a stop dog component from this groove, and the base portion of this stop dog component is contained in slidably in this groove, thereby allows the length displacement of stop dog component along this arm.
In use, the desired distance between the free end of angle beam zone and the convex member can be by the stop dog component that correspondingly is shifted, the free end zone of angle beam shelved against stop dog component adjust then.
Description of drawings
Now with reference to accompanying drawing and by following non-limiting example the present invention is described.
In the accompanying drawings:
Fig. 1 is the stereogram of stamping tool;
Fig. 2 is the stereogram of convex member of the stamping tool of Fig. 1;
Fig. 3 is the stereogram of concavity member of the stamping tool of Fig. 1; And
Fig. 4 is the exploded view of convex member of the stamping tool of Fig. 1; And
Fig. 5 is the exploded view of concavity member of the stamping tool of Fig. 1.
The specific embodiment
In the drawings, Reference numeral 10 indicates an embodiment according to stamping tool of the present invention generally.
The stamping tool 10 that is used to form at least a portion of angle beam (not shown) comprises convex member 12, and this convex member 12 has first tool surfaces 14, and this first tool surfaces 14 is used for admitting in use at least a portion of angle beam thereon.
First tool surfaces 14 has two inclined surfaces 16.1 and 16.2, limits one between these two inclined surfaces less than 90 ° angle.
Instrument 10 also comprises concavity member 18, and this concavity member 18 has second tool surfaces 20 with the shape complementarity of first tool surfaces 14, and this second tool surfaces 20 is used for engaging in use the angle beam that is positioned on the convex member 12.
Convex member 12 and concavity member 18 are made up of modular unit 22 and 24 respectively, thereby make the length of convex member 12 and concavity member 18 to be changed, and the length of the part of formed angle beam can be changed.
The angle α that is limited between two inclined surfaces 16.1 and 16.2 typically is about 60 °.Therefore, for 90 ° of angles of standard, will have the about 60 ° angle that is reduced between two legs of the part of the angle beam that use stamping tool 10 forms.
As being clear that in Fig. 1 and Fig. 2, the modular unit 22 of convex member 12 is the form of general triangular piece, and wherein two of gore sides limit first tool surfaces 14.Each convex modular unit 22 has preset thickness.Perhaps, modular unit 22 can be with selectable thickness setting.
Convex member 12 also comprises along the knife-edge seamed edge 26 of top 28 longitudinal extensions of convex member 12, admits the apex zone of angle beam during use on this knife-edge seamed edge 26.Term " knife-edge seamed edge " should not be interpreted as having a sharp edge, and should be interpreted as forming with the interior apex zone of angle beam the fillet seamed edge of complementary fit.
In an illustrated embodiment, knife-edge seamed edge 26 is for being attached to the form of the longitudinal rod 30 of convex member 12 along the top 28 of convex member.Bar 30 also is located in a plurality of modular units with predetermined length, being adapted to the various quantity of convex modular unit 22 and concavity modular unit 24, and is adapted to the various length of convex member 12 and concavity member 18 thus.
The modular unit 24 of concavity member 18 limits two inclined surfaces 32.1 and 32.2 with the inclined surface 16.1 of convex member 12 and 16.2 complementations.Each concavity modular unit 24 has a predetermined thickness, perhaps is arranged in the thickness range.
Convex member 12 can be adapted to have the long angle beam of different legs with concavity member 18, even is adapted to have the angle beam of not isometric leg, as long as these legs do not extend beyond first tool surfaces 14 and second tool surfaces 20.Therefore distance 34 is selected as being adapted to the angle beam of the maximum that tool using 10 forms.
Flange 36 is from the either side horizontal expansion of the base regions 38 of convex modular unit 22 and concavity modular unit 24.
Convex member 12 and concavity member 18 are separately positioned on first substrate 40 and second substrate 42, and substrate 40,42 is mounted on the conventional metal stamping machine (typically being hydraulic press) in use.
First substrate 40 and second substrate 42 comprise first passage 44 and second channel 46 respectively, and first passage 44 and second channel 46 are used for admitting therein respectively the base regions 38 of convex modular unit 22 and concavity modular unit 24.
When the convex modular unit 22 that will select quantity and concavity modular unit 24 are placed in first passage 44 and the second channel 46 (this quantity depends on the length " l " of angle beam to be formed), first carriage 48 and second carriage 50 are arranged on the flange 36, and are connected on first substrate 40 and second substrate 42 by suitable jockey (for example bolt 52).
Carriage 48 and 50 also can be set to have the modular unit of preset width, being adapted to the various quantity of convex modular unit 22 and concavity modular unit 24, and therefore is adapted to the various length of convex member 12 and concavity member 18.
Convex modular unit 22 and concavity modular unit 24 are provided with screwed hole 54, when modular unit 22,24 is admitted by first passage 44 and second channel 46 respectively, arrange these holes mutually alignedly.Threaded rod 56 can be passed hole 54 and be fixed on these unit 22,24 by nut collar device 58.
Thus, convex modular unit 22 and concavity modular unit 24 are fixed to first substrate 40 and second substrate 42 by carriage 48,50 respectively, in addition, convex modular unit 22 is connected by threaded rod 56, and concavity modular unit 24 is connected by two threaded rods 56.
Stamping tool 10 provides the established part that is in angle beam (that is, the angle between two legs of this beam reduced part) and has been positioned at transitional region 60 between (angle between two legs of this angle beam is about 90 °) zone of each side of above-mentioned established part.
First supporting member 62 and second supporting member 64 are positioned with the free end relation separately with convex member 12, and this first supporting member 62 and second supporting member 64 have inclined surface 66, limit about 90 a ° angle between the described inclined surface 66.Thus, retrain angle beam defining between the free end of convex member 12 and first supporting member 62, second supporting member 64 in the process that first transitional region 60.1 and second transitional region, 60.2, the first supporting members 62 and second supporting member 64 also forming angle beam by its two legs that maintain each other into about 90 ° of angles.
In forming the process of angle beam, be that angle beam provides additional support by being positioned with separately relation with first supporting member and second supporting member and coming away from first stabilizer 70 of convex member 12 and second stabilizer 72.As shown in Figure 1, it is conical that the shape of the upper area of first stabilizer 70 and second stabilizer 72 is, so that it is easy to be set at the interior top of angle beam.
The bar 56 that passes convex modular unit 22 also passes first supporting member 62 and 64 extensions of second supporting member, and penetrates in first stabilizer 70 and second stabilizer 72.
Also be provided with and be used to adjust the free end zone of angle beam and the spacing device 74 of the distance ' ' d ' ' between the convex member 12.This spacing device comprises from the arm 76 of the trough of belt of first substrate, 40 extensions.Stop dog component 78 vertically extends substantially from groove 80, and the base portion of stop dog component 78 can be contained in the groove 80 slidably, thereby allows the length displacement of stop dog component 78 along groove 80, and then is shifted along the length of arm 76.
In use, the desired distance between the free end of angle beam zone and the convex member 12 can be shelved the free end zone of angle beam and regulate then by the stop dog component 78 that correspondingly is shifted against stop dog component 78.
If expectation forms whole angle beam by stamping tool 10, then this beam can form in the mode of increment (increment) naturally, and the length of angle beam is by the maximum length decision of convex member 12 and concavity member 18.
The advantage of stamping tool of the present invention is, adjusts the free end of the length of length, transitional region of angle beam to be formed and this angle beam and the distance between the part to be formed easily, and do not need the personnel of the work of adjusting very skilled in this regard.This instrument can be used in conventional stamping machine, and the device that is used to form angle beam that a kind of frame for movement is simple, cost benefit is good is provided.
It should be understood that the present invention is not limited to as mentioned institute an any specific embodiment or the configuration summarizing or illustrate.

Claims (19)

1. stamping tool is used to form at least a portion of angle beam, and described stamping tool comprises:
The convex member, it has first tool surfaces, described first tool surfaces is used for admitting in use at least a portion of described angle beam thereon, and described first tool surfaces has two inclined surfaces, limits one between described two inclined surfaces less than 90 ° angle; And
The concavity member, it has second tool surfaces of shape and the described first tool surfaces complementation, and described second tool surfaces is used for engaging in use the described angle beam that is positioned on the described convex member; Wherein said convex member and concavity member are made up of modular unit, thereby the length of described convex member and concavity member can be changed, and the described part of formed described angle beam can be changed.
2. stamping tool as claimed in claim 1, the angle that is limited between described two inclined surfaces of wherein said first tool surfaces is about 60 °.
3. stamping tool as claimed in claim 1 or 2, the described modular unit of wherein said convex member are roughly triangular in shape form, and two sides of wherein said gore limit described first tool surfaces.
4. as each described stamping tool in the claim 1 to 3, wherein said convex member comprises along the knife-edge seamed edge of the top longitudinal extension of described convex member, admits the apex zone of described angle beam during use on described knife-edge rib.
5. stamping tool as claimed in claim 4, wherein said knife-edge rib is the form that is arranged on the bar in the modular unit with predetermined length.
6. each described stamping tool in the claim as described above, the described modular unit of wherein said concavity member define two inclined surfaces with the described inclined surface complementation of described convex member.
7. each described stamping tool in the claim as described above, wherein the either side horizontal expansion from the base regions of described convex modular unit and concavity modular unit has flange.
8. each described stamping tool in the claim as described above, wherein said convex member and concavity member lay respectively on first substrate and second substrate, and described substrate is mounted on the conventional metal stamping machine in use.
9. stamping machine as claimed in claim 8, wherein said first substrate and second substrate comprise first passage and second channel, and described first passage and second channel are used for admitting therein respectively the base regions of described convex modular unit and concavity modular unit.
10. stamping tool as claimed in claim 9, wherein first carriage and second carriage are set on the described flange that extends from the either side of the described base regions of described modular unit, and are connected to described first substrate and second substrate by suitable jockey.
11. each described stamping tool in the claim as described above, wherein said convex modular unit and concavity modular unit are provided with screwed hole, described screwed hole is arranged in use with being aligned, so that threaded rod can pass described screwed hole, thus single described unit is fixed together.
12. each described stamping tool in the claim as described above, wherein at described convex member and between the zone on the either side of described convex member, be provided with transitional region, described transitional region is limited between the free end zone and described first supporting member and second supporting member of described convex member, described first supporting member and second supporting member have inclined surface, limit about 90 a ° angle between the described inclined surface.
13. stamping tool as claimed in claim 12, wherein be provided with first stabilizer and second stabilizer, described first stabilizer and second stabilizer and described first supporting member and second supporting member are in the relation that separates and away from described convex member, and it is conical that the shape of the upper area of wherein said first stabilizer and second stabilizer is, so that it is easy to be positioned in the interior top of described angle beam.
14. each described stamping tool in the claim as described above wherein is provided with and is used to adjust the free end zone of described angle beam and the spacing device of the distance between the described convex member.
15. stamping tool as claimed in claim 14, wherein said spacing device comprise from the arm of the trough of belt of described stamping tool extension.
16. stamping tool as claimed in claim 15, wherein vertically be extended with stop dog component substantially from described groove, and the base portion of described stop dog component can be contained in the described groove slidably, thereby allows the length displacement of described stop dog component along described arm.
17. description or illustrative as mentioned substantially according to stamping tool of the present invention.
18. the arbitrary accompanying drawing of reference is clearly described or as arbitrary stamping tool shown in the drawings.
19. one kind comprises as the stamping tool of any new and combinations innovative integral body or a plurality of integral body described here substantially.
CN2009801097482A 2008-03-19 2009-03-18 A pressing tool Pending CN102015144A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
ZA2008/2534 2008-03-19
ZA200802534 2008-03-19
PCT/ZA2009/000026 WO2009117748A2 (en) 2008-03-19 2009-03-18 A pressing tool

Publications (1)

Publication Number Publication Date
CN102015144A true CN102015144A (en) 2011-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN2009801097482A Pending CN102015144A (en) 2008-03-19 2009-03-18 A pressing tool

Country Status (2)

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CN (1) CN102015144A (en)
WO (1) WO2009117748A2 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102441613A (en) * 2011-11-29 2012-05-09 江苏振光电力设备制造有限公司 Die for forming opening angle or closed angle of combined angle steel
CN103480736A (en) * 2013-09-24 2014-01-01 浙江恒瑞金属科技有限公司 Angle steel flattening die and method
CN104028596A (en) * 2014-05-23 2014-09-10 宁波赛乐福板材成型技术有限公司 Plate continuous asymptotic forming device
CN104588499A (en) * 2014-12-31 2015-05-06 国家电网公司 Angle steel punching mold
CN107096829A (en) * 2017-06-30 2017-08-29 四川宇桥铁塔有限公司 The device of quality is flattened for improving angle steel
CN109226517A (en) * 2018-11-26 2019-01-18 大连石岛工业有限公司 A kind of Bending Mould

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474657A (en) * 1966-04-26 1969-10-28 Raymond J Spiegel Laminated press brake die
DE2117245A1 (en) * 1970-04-09 1971-10-28 Laminated press tool
US5878619A (en) * 1998-02-09 1999-03-09 Walczak; Kenneth H. Laminated punch and die assemblies
CN1259889A (en) * 1997-06-20 2000-07-12 卢恰诺·加斯帕里尼 Machine for press-bending metal sheet
JP2004337919A (en) * 2003-05-15 2004-12-02 Oi Seisakusho Co Ltd Laminated die
US20070005176A1 (en) * 2004-10-29 2007-01-04 Tsunehiko Yamazaki Method for producing die for press brake and die

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3474657A (en) * 1966-04-26 1969-10-28 Raymond J Spiegel Laminated press brake die
DE2117245A1 (en) * 1970-04-09 1971-10-28 Laminated press tool
CN1259889A (en) * 1997-06-20 2000-07-12 卢恰诺·加斯帕里尼 Machine for press-bending metal sheet
US5878619A (en) * 1998-02-09 1999-03-09 Walczak; Kenneth H. Laminated punch and die assemblies
JP2004337919A (en) * 2003-05-15 2004-12-02 Oi Seisakusho Co Ltd Laminated die
US20070005176A1 (en) * 2004-10-29 2007-01-04 Tsunehiko Yamazaki Method for producing die for press brake and die

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102441613A (en) * 2011-11-29 2012-05-09 江苏振光电力设备制造有限公司 Die for forming opening angle or closed angle of combined angle steel
CN102441613B (en) * 2011-11-29 2014-03-05 江苏振光电力设备制造有限公司 Die for forming opening angle or closed angle of combined angle steel
CN103480736A (en) * 2013-09-24 2014-01-01 浙江恒瑞金属科技有限公司 Angle steel flattening die and method
CN104028596A (en) * 2014-05-23 2014-09-10 宁波赛乐福板材成型技术有限公司 Plate continuous asymptotic forming device
CN104028596B (en) * 2014-05-23 2016-01-06 宁波赛乐福板材成型技术有限公司 The continuous asymptotic shaped device of sheet material
CN104588499A (en) * 2014-12-31 2015-05-06 国家电网公司 Angle steel punching mold
CN107096829A (en) * 2017-06-30 2017-08-29 四川宇桥铁塔有限公司 The device of quality is flattened for improving angle steel
CN107096829B (en) * 2017-06-30 2018-10-12 四川宇桥铁塔有限公司 The device of quality is flattened for improving angle steel
CN109226517A (en) * 2018-11-26 2019-01-18 大连石岛工业有限公司 A kind of Bending Mould

Also Published As

Publication number Publication date
WO2009117748A2 (en) 2009-09-24
WO2009117748A3 (en) 2009-12-10

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