CN103495631A - Spinning steel plate edge pre-bending method and device - Google Patents
Spinning steel plate edge pre-bending method and device Download PDFInfo
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- CN103495631A CN103495631A CN201310461173.9A CN201310461173A CN103495631A CN 103495631 A CN103495631 A CN 103495631A CN 201310461173 A CN201310461173 A CN 201310461173A CN 103495631 A CN103495631 A CN 103495631A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 112
- 239000010959 steel Substances 0.000 title claims abstract description 112
- 238000005452 bending Methods 0.000 title claims abstract description 51
- 238000009987 spinning Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000003825 pressing Methods 0.000 claims abstract description 16
- 238000001125 extrusion Methods 0.000 claims description 23
- 238000007493 shaping process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000003754 machining Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 25
- 238000003466 welding Methods 0.000 description 8
- 230000006872 improvement Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000007689 inspection Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000013000 roll bending Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The invention discloses a spinning steel plate edge pre-bending method and device and belongs to the field of metal plate machining shaping. According to the spinning steel plate edge pre-bending method and device, pre-bending is conducted on the two side plate edges of a steel plate through a rotating pressing head and a lower carrier roller set, in the process of pre-bending, the rotating pressing head and the lower carrier roller set tightly clamp the steel plate, then the rotating pressing head is rotated, the steel plate is tightly attached to a forming die under the drive of the rotating pressing head, and the steel plate is bent and formed according to the boundary dimension of the forming die. By the adoption of the spinning steel plate edge pre-bending method and device, the overall-length plate edge of the steel plate can be formed through one whole rotating pressing head in one-off pre-bending, the forming efficiency is high, the shape of the formed plate edge is even, and the effect is good.
Description
Technical field
The present invention, for metallic plate machine-shaping field, particularly relates to a kind of rotary extrusion type spinning steel plate edges of boards pre-bending method and equipment.
Background technology
In the large straight-line joint submerged arc welding tube production technology, steel pipe forming technique is that at first steel plate is placed on edge planer or edge milling machines, and machined is carried out in the steel plate both sides, obtains steel plate width size, the edges of boards bevel for welding of welded tube technological requirement.Because the former of current large straight-line joint submerged arc welding tube is undesirable to the molding effect of steel plate edges of boards, so at first the steel plate of edges of boards after machined be transported to prebending machine, and edges of boards are carried out to brake forming.Prebending machine commonly used has two kinds of forms at present, and a kind of is to adopt the roll cold roll forming, and steel plate longitudinally enters prebending machine, is placed in the cold bending roller on steel plate both sides by 4 roads, to steel plate edges of boards rolling-bending forming, makes edges of boards bend to the shape needed; Another kind is to adopt mould compressing, and steel plate longitudinally enters prebending machine, and by being placed in the compacting tool set on steel plate both sides, segmentation is pressed into the plate shape needed to edges of boards.Steel plate after pre-bending is delivered to the equipment such as moulding, welding and hole enlargement and is carried out the operations such as moulding, welding and hole enlargement.Along with increasing that processing welded tube material requires, improving constantly of the increase that wall thickness requires and production efficiency, above-mentioned two kinds of prebending machines have manifested following shortcoming: although 1, roll cold roll forming formula prebending machine production efficiency is high, but to some moulding of the pre-bending than steel plate, molding effect is undesirable, the forming ability deficiency; Although 2, mould is pressed into the plastic thicker steel plate of pattern prebending machine, needs sectional forming, shaping efficiency is slower, can not meet the needs of High-efficient Production, and the transition region molding effect of last profiled section and a rear profiled section is undesirable.
Summary of the invention
For addressing the above problem, the invention provides a kind of working (machining) efficiency high, the edges of boards shape after moulding is even, rotary extrusion type spinning steel plate edges of boards pre-bending method and the equipment of good forming effect.
The technical solution adopted for the present invention to solve the technical problems is: a kind of rotary extrusion type spinning steel plate edges of boards pre-bending method comprises the following steps:
A. steel plate is placed on to a side of rotary press head, makes steel plate treat that the edges of boards of pre-bending are between rotary press head and snub pulley group;
B. steel plate is treated to the edges of boards of pre-bending are fastened on the mould surface in the rotary press head outside;
C. press down rotary press head, the edges of boards of steel plate are pressed between mould and snub pulley group;
D. rotate rotary press head, steel plate is close to mould under the drive of rotary press head, and presses the appearance and size brake forming of mould;
E. after rotary press head rotates to suitable angle, then steel plate is separated from the mould surface, exit steel plate, complete the brake forming on steel plate side plate limit;
F. steel plate is moved to the opposite side of rotary press head, repeating step A～E completes the brake forming of steel plate opposite side edges of boards.
A kind of rotary extrusion type spinning steel plate edges of boards pre-bending equipment, the rotary press head that comprises base, is located at the snub pulley group of base upside and is located at snub pulley group top, the outer surface of rotary press head is provided with mould and edges of boards clamping device, is provided with the driving head that drives rotary press head to rotate on base at the two ends of rotary press head.
Be further used as the improvement of technical solution of the present invention, driving head comprises by base upwards props up and is provided with the track frame of vertical track, unit head and the driving unit head edge hoist cylinder that vertically track slides up and down that is located on the track frame and drives rotary press head to rotate.
Be further used as the improvement of technical solution of the present invention, unit head comprises housing, penetrates main shaft and some power motors be located on housing of housing sidewall, main shaft docks with rotary press head at an end of hull outside, the end of main shaft in housing is provided with driven gear wheel, and the output of each power motor is equipped with and driven gear wheel meshed gears axle.
Be further used as the improvement of technical solution of the present invention, rotary press head comprises columned pressure head body and is positioned at the two ends of pressure head body and the chuck docked with main shaft.
Be further used as the improvement of technical solution of the present invention, the T clevis piece of edges of boards clamping device for being stretched out by rotary press head.
Be further used as the improvement of technical solution of the present invention, also comprise the anti-deflection device that is located at the rotary press head upside, anti-deflection device comprises that two ends are erected at crossbeam and the some down pressing oil cylinder leant out by crossbeam on the track frame downwards, and the lower end of each down pressing oil cylinder is equipped with the lower press rolls roller that compresses rotary press head.
Be further used as the improvement of technical solution of the present invention, also comprise the steel plate conveyer, the steel plate conveyer comprises that a left side that is positioned at rotary press head left side is vertical and send device and the left horizontal device that send, and vertical device and the right horizontal device that send of sending in the right side that is positioned at the rotary press head right side.
Be further used as the improvement of technical solution of the present invention, the snub pulley group comprises snub pulley and is located at the snub pulley downside and holds the snub pulley frame of snub pulley.
Beneficial effect of the present invention: the present invention carries out respectively pre-bending by rotary press head and snub pulley group to the both sides edges of boards of steel plate, during pre-bending, rotary press head and snub pulley group clamp steel plate, then rotate rotary press head, steel plate is close to mould under the drive of rotary press head, and presses the appearance and size brake forming of mould.In the present invention, the total length edges of boards of steel plate can complete moulding by a whole piece rotary press head in a pre-bending, and shaping efficiency is high, and the edges of boards shape after moulding is even, respond well.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is rotary extrusion type spinning steel plate edges of boards pre-bending method schematic flow sheet of the present invention;
Fig. 2 is rotary extrusion type spinning steel plate edges of boards pre-bending device structure top view in the present invention;
Fig. 3 is rotary extrusion type spinning steel plate edges of boards pre-bending device structure front view in the present invention;
Fig. 4 is rotary extrusion type spinning steel plate edges of boards pre-bending device structure side view in the present invention;
Fig. 5 is medium power header structure schematic diagram of the present invention;
Fig. 6 is rotary press head structural front view in the present invention;
Fig. 7 is rotary press head structure side view in the present invention;
Fig. 8 is anti-deflection device structural representation in the present invention;
Fig. 9 is snub pulley group structural representation in the present invention.
The specific embodiment
The large straight-line joint submerged arc welding tube production technology is that steel plate is placed on edge planer or edge milling machines, after machined is carried out in the steel plate both sides, be transported on pre-bending equipment, two edges of boards are carried out to the pre-bending moulding, be transported to again on forming machine and carry out moulding, the method of steel pipe forming has multiple, includes UO moulding, JCO moulding or roll bending formation etc.Pipe after moulding carries out total length prewelding and inside and outside weldering, and the steel pipe after welding is transported to expanding machine and carries out cold hole enlargement, then is transported to the bevel for welding of End polishing machine to steel tube end part processing pipe end docking use, and carries out quality inspection on Ge road inspection machine subsequently.
With reference to Fig. 1, the invention provides a kind of rotary extrusion type spinning steel plate edges of boards pre-bending method, comprise the following steps:
A. steel plate 9 is placed on to a side of rotary press head 3, makes steel plate 9 treat that the edges of boards of pre-bending are between rotary press head 3 and snub pulley group 2;
B. steel plate 9 is treated to the edges of boards of pre-bending are fastened on mould 4 surfaces in rotary press head 3 outsides;
C. press down rotary press head 3, the edges of boards of steel plate 9 are pressed between mould 4 and snub pulley group 2;
D. rotate rotary press head 3, steel plate 9 is close to mould 4 under the drive of rotary press head 3, and presses the appearance and size brake forming of mould 4;
E. after rotary press head 3 rotates to suitable angle, then steel plate 9 is separated from mould 4 surfaces, exit steel plate 9, complete the brake forming on steel plate 9 side plate limits;
F. steel plate 9 is moved to the opposite side of rotary press head 3, repeating step A～E completes the brake forming of steel plate 9 opposite side edges of boards.
This rotary extrusion type spinning steel plate edges of boards pre-bending method carries out respectively pre-bending by the both sides edges of boards of rotary press head 3 and 2 pairs of steel plates 9 of snub pulley group, during pre-bending, rotary press head 3 and snub pulley group 2 clamp steel plate 9, then rotate rotary press head 3, steel plate 9 is close to mould 4 under the drive of rotary press head 3, and presses the appearance and size brake forming of mould 4.Adopt the advantage of said method to be: the total length edges of boards of steel plate 9 can complete moulding by a whole piece rotary press head 3 in a pre-bending, replacing in prior art needs segmentation to carry out the mould drawing method of moulding, shaping efficiency is high, and the edges of boards shape after moulding is even, respond well.
With reference to Fig. 2～Fig. 9, the present invention also provides a kind of rotary extrusion type spinning steel plate edges of boards pre-bending equipment of realizing above-mentioned rotary extrusion type spinning steel plate edges of boards pre-bending method, the rotary press head 3 that comprises base 1, is located at the snub pulley group 2 of base 1 upside and is located at snub pulley group 2 tops, the outer surface of rotary press head 3 is provided with mould 4 and edges of boards clamping device 5, is provided with the driving head 6 that drives rotary press head 3 to rotate on base 1 at the two ends of rotary press head 3.This rotary extrusion type spinning steel plate edges of boards pre-bending equipment is when the pre-bending moulding, the side plate limit of steel plate 9 is placed between rotary press head 3 and snub pulley group 2, and make edges of boards be close to mould 4 by edges of boards clamping device 5, then start driving head 6, by driving head 6 driven rotary pressure head 3 forward rotation, the edges of boards of steel plate 9 are close to mould 4 under the drive of rotary press head 3, and press the appearance and size brake forming of mould 4, have so just completed the moulding on steel plate 9 side plate limits; Unclamp edges of boards clamping device 5, take off steel plate 9 and be placed in the opposite side of rotary press head 3, again the opposite side edges of boards of steel plate 9 are placed between rotary press head 3 and snub pulley group 2, and make edges of boards be close to mould 4 by edges of boards clamping device 5, then start driving head 6, rotate backward by driving head 6 driven rotary pressure heads 3, the edges of boards of steel plate 9 are close to mould 4 under the drive of rotary press head 3, and the appearance and size brake forming of pressing mould 4, so just completed the moulding of steel plate 9 both sides edges of boards.The T clevis piece of edges of boards clamping device 5 for being stretched out by rotary press head 3 in the present embodiment.It is fastening that T clevis piece can meet steel plate 9 edges of boards of inserting from rotary press head 3 both sides.And mould 4 can be changed difformity and size according to different size and the material of institute's shaping steel tube.
Wherein, driving head 6 comprise by base 1 upwards prop up and be provided with vertical track 61 track frame 62, be located on track frame 62 and the unit head 63 that drives rotary press head 3 to rotate and the hoist cylinders 64 that drive unit head 63 to slide up and down along vertical tracks 61.Vertical track 61 is positioned at the both sides of unit head 63, and unit head 63 can slide up and down along vertical track 61 in track frame 62, and hoist cylinder 64 is controlled unit head 63 and slided up and down, and provides the moulding downforce by 63 pairs of rotary press heads 3 of unit head.
In order to prevent that rotary press head 3 is bent upwards distortion because of stressed in the steel plate forming BENDING PROCESS, the spy is provided with anti-deflection device 7, anti-deflection device 7 is positioned at the upside of rotary press head 3, anti-deflection device 7 comprises that two ends are erected at crossbeam 71 and the some down pressing oil cylinder leant out by crossbeam 71 72 on track frame 62 downwards, the lower end of each down pressing oil cylinder 72 is equipped with the lower press rolls roller 73 that compresses rotary press head 3, crossbeam 71 is connected as a single entity by track frame 62 and base 1, anti-deflection device 7 is furnished with 3 groups of down pressing oil cylinder 72, the lower end of every group of down pressing oil cylinder 72 is equipped with lower press rolls roller 73, down pressing oil cylinder 72 is pressed on rotary press head 3 by lower press rolls roller 73, down pressing oil cylinder 72 is controlled lower press rolls roller 73 and is moved up and down with rotary press head 3, rotary press head 3 is applied to downforce, to prevent that rotary press head 3 is bent upwards because of stressed, and promote according to this pre-bending ability of whole equipment.
Also comprise the steel plate conveyer, the steel plate conveyer comprises that a left side that is positioned at rotary press head 3 left sides is vertical and send device 81 and leftly horizontally send device 82, and vertical device 83 and the right horizontal device 84 that send of sending in the right side that is positioned at rotary press head 3 right sides.Wherein, the right horizontal device 84 that send enters the edges of boards clamping device 5 of rotary press head 3 and controls and to move back plate for controlling the Second Edge edges of boards, left horizontal send device 82 and right horizontal send device 84 actings in conjunction can steel plate 9 from one side of rotary press head 3 the horizontal another side of delivering to; The left vertical device 83 that send is for being connected with a upper procedure and controlling longitudinal feeding, and the right side is indulged and sent device 83 for being connected with next process and controlling vertical material returned.In the present embodiment, left vertical device 81 and the right vertical device 83 that send of sending is for conveying roller, and left horizontal device 82 and the right horizontal device 84 that send of sending is for carrier chain.The concrete course of work is: steel plate 9 is indulged and is sent device 81 vertically to deliver to left horizontal sending on device 82 by a left side, by the left horizontal device 82 that send, steel plate is sent into to 2 of rotary press head 3 and snub pulley groups again, and complete the moulding of first side edges of boards, after completing the moulding of first side edges of boards, rotary press head 3 rises, steel plate 9 is by left horizontal send device 82 and the right horizontal acting in conjunction of sending device 84, the traversing another side to rotary press head 3, the another side edges of boards are carried out to moulding, after completing the moulding of Second Edge edges of boards, steel plate exits base 1 by the right horizontal device 84 that send, deliver to right vertical sending on device 83, indulge and send device 83 to be sent to subsequent processing by the right side.
Wherein, snub pulley group 2 comprises snub pulley 21 and is located at snub pulley 21 downsides and holds the snub pulley frame 22 of snub pulley 21.Snub pulley 21 overall length 12.5m, form by 4 sections.Snub pulley frame 22 plays supporting snub pulley 21, and plays supporting steel plate in the steel plate forming process.
Certainly, the invention is not limited to above-mentioned embodiment, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and the modification that these are equal to or replacement all are included in the application's claim limited range.
Claims (9)
1. a rotary extrusion type spinning steel plate edges of boards pre-bending method is characterized in that comprising the following steps:
A. steel plate is placed on to a side of rotary press head, makes described steel plate treat that the edges of boards of pre-bending are between rotary press head and snub pulley group;
B. described steel plate is treated to the edges of boards of pre-bending are fastened on the mould surface in the rotary press head outside;
C. press down described rotary press head, the edges of boards of described steel plate are pressed between mould and snub pulley group;
D. rotate described rotary press head, steel plate is close to mould under the drive of rotary press head, and presses the appearance and size brake forming of mould;
E. after rotary press head rotates to suitable angle, more described steel plate is separated from the mould surface, exit steel plate, complete the brake forming on described steel plate side plate limit;
F. described steel plate is moved to the opposite side of rotary press head, repeating step A～E completes the brake forming of described steel plate opposite side edges of boards.
2. a rotary extrusion type spinning steel plate edges of boards pre-bending equipment, it is characterized in that: the rotary press head that comprises base, is located at the snub pulley group of described base upside and is located at described snub pulley group top, the outer surface of described rotary press head is provided with mould and edges of boards clamping device, is provided with the driving head that drives described rotary press head to rotate on described base at the two ends of rotary press head.
3. rotary extrusion type spinning steel plate edges of boards pre-bending equipment according to claim 2 is characterized in that: described driving head comprise by described base upwards props up and is provided with vertical track the track frame, be located on described track frame and the unit head that drives described rotary press head to rotate and the hoist cylinder that drives described unit head to slide up and down along vertical track.
4. rotary extrusion type spinning steel plate edges of boards pre-bending equipment according to claim 3, it is characterized in that: described unit head comprises housing, penetrates main shaft and some power motors be located on described housing of described housing sidewall, described main shaft docks with rotary press head at an end of hull outside, the end of described main shaft in housing is provided with driven gear wheel, and the output of each described power motor is equipped with and described driven gear wheel meshed gears axle.
5. rotary extrusion type spinning steel plate edges of boards pre-bending equipment according to claim 4 is characterized in that: described rotary press head comprises columned pressure head body and is positioned at the two ends of described pressure head body and the chuck docked with main shaft.
6. according to the described rotary extrusion type spinning steel plate of claim 2～5 any one edges of boards pre-bending equipment, it is characterized in that: the T clevis piece of described edges of boards clamping device for being stretched out by rotary press head.
7. according to claim 3,4 or 5 described rotary extrusion type spinning steel plate edges of boards pre-bending equipment, it is characterized in that: also comprise the anti-deflection device that is located at described rotary press head upside, described anti-deflection device comprises that two ends are erected at crossbeam and the some down pressing oil cylinder leant out by described crossbeam on described track frame downwards, and the lower end of each described down pressing oil cylinder is equipped with the lower press rolls roller that compresses described rotary press head.
8. rotary extrusion type spinning steel plate edges of boards pre-bending equipment according to claim 7, it is characterized in that: also comprise the steel plate conveyer, described steel plate conveyer comprises that a left side that is positioned at described rotary press head left side is vertical and send device and the left horizontal device that send, and vertical device and the right horizontal device that send of sending in the right side that is positioned at described rotary press head right side.
9. rotary extrusion type spinning steel plate edges of boards pre-bending equipment according to claim 7 is characterized in that: described snub pulley group comprises snub pulley and is located at described snub pulley downside and holds the snub pulley frame of described snub pulley.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310461173.9A CN103495631B (en) | 2013-09-30 | 2013-09-30 | Spinning steel plate edge pre-bending method and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310461173.9A CN103495631B (en) | 2013-09-30 | 2013-09-30 | Spinning steel plate edge pre-bending method and device |
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| Publication Number | Publication Date |
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| CN103495631A true CN103495631A (en) | 2014-01-08 |
| CN103495631B CN103495631B (en) | 2015-06-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114210797A (en) * | 2021-12-17 | 2022-03-22 | 湖北三江航天红阳机电有限公司 | Arc pre-bending and shape correcting method for titanium alloy cylindrical skin |
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|---|---|---|---|---|
| US3879994A (en) * | 1973-08-16 | 1975-04-29 | Kenneth Michael Hume | Plate rolling |
| US3899911A (en) * | 1974-03-27 | 1975-08-19 | Anvar | Sheetmetal rolling machine |
| FR2539655A1 (en) * | 1983-01-24 | 1984-07-27 | Beauplat Gilles | Improved shaping device for profiling a ring made from thin sheet metal |
| WO1990010511A1 (en) * | 1989-03-15 | 1990-09-20 | Hu-Metal Engineering Pty. Limited | Apparatus for forming a pipe from a sheet metal plate |
| CN2079537U (en) * | 1990-11-09 | 1991-06-26 | 左美霞 | Tube making machine formed by core roller |
| JPH09276939A (en) * | 1996-04-12 | 1997-10-28 | Inoue Sangyo Kk | Two roll forming machine using curvature adjusting roll |
| CN1775400A (en) * | 2005-12-07 | 2006-05-24 | 金富一 | Plate-to-pipe shaping apparatus |
| CN203541200U (en) * | 2013-09-30 | 2014-04-16 | 番禺珠江钢管有限公司 | Spinning-type steel plate edge prebending equipment |
-
2013
- 2013-09-30 CN CN201310461173.9A patent/CN103495631B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3879994A (en) * | 1973-08-16 | 1975-04-29 | Kenneth Michael Hume | Plate rolling |
| US3899911A (en) * | 1974-03-27 | 1975-08-19 | Anvar | Sheetmetal rolling machine |
| FR2539655A1 (en) * | 1983-01-24 | 1984-07-27 | Beauplat Gilles | Improved shaping device for profiling a ring made from thin sheet metal |
| WO1990010511A1 (en) * | 1989-03-15 | 1990-09-20 | Hu-Metal Engineering Pty. Limited | Apparatus for forming a pipe from a sheet metal plate |
| CN2079537U (en) * | 1990-11-09 | 1991-06-26 | 左美霞 | Tube making machine formed by core roller |
| JPH09276939A (en) * | 1996-04-12 | 1997-10-28 | Inoue Sangyo Kk | Two roll forming machine using curvature adjusting roll |
| CN1775400A (en) * | 2005-12-07 | 2006-05-24 | 金富一 | Plate-to-pipe shaping apparatus |
| CN203541200U (en) * | 2013-09-30 | 2014-04-16 | 番禺珠江钢管有限公司 | Spinning-type steel plate edge prebending equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114210797A (en) * | 2021-12-17 | 2022-03-22 | 湖北三江航天红阳机电有限公司 | Arc pre-bending and shape correcting method for titanium alloy cylindrical skin |
| CN114210797B (en) * | 2021-12-17 | 2023-11-14 | 湖北三江航天红阳机电有限公司 | Arc pre-bending and shape correcting method for titanium alloy cylindrical skin |
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| CN103495631B (en) | 2015-06-17 |
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Effective date of registration: 20170627 Address after: 1 No. 519050 Guangdong city of Zhuhai province equipment manufacturing district Gaolan Port Economic Zone South Road Patentee after: PANYU CHU KONG STEEL PIPE (ZHUHAI) CO.,LTD. Address before: Qinghe Road Guangzhou city Guangdong province 511450 Panyu District Shiji Town Patentee before: PANYU CHU KONG STEEL PIPE Co.,Ltd. |
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Denomination of invention: Spinning steel plate edge pre-bending method and device Effective date of registration: 20190920 Granted publication date: 20150617 Pledgee: Zhuhai Huafa Business and Trade Holding Co.,Ltd. Pledgor: PANYU CHU KONG STEEL PIPE (ZHUHAI) CO.,LTD. Registration number: Y2019980000179 |
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Denomination of invention: A pre bending method and equipment for spinning steel plate edge Effective date of registration: 20200911 Granted publication date: 20150617 Pledgee: Zhuhai Huafa Business and Trade Holding Co.,Ltd. Pledgor: PANYU CHU KONG STEEL PIPE (ZHUHAI) Co.,Ltd. Registration number: Y2020980005957 |
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