CN1227779A - Method for deciding parameters of drum-type flying shears mechanism according to technological requirement - Google Patents
Method for deciding parameters of drum-type flying shears mechanism according to technological requirement Download PDFInfo
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- CN1227779A CN1227779A CN 98126309 CN98126309A CN1227779A CN 1227779 A CN1227779 A CN 1227779A CN 98126309 CN98126309 CN 98126309 CN 98126309 A CN98126309 A CN 98126309A CN 1227779 A CN1227779 A CN 1227779A
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000007246 mechanism Effects 0.000 title claims description 20
- 238000010008 shearing Methods 0.000 claims abstract description 24
- 229910000831 Steel Inorganic materials 0.000 claims description 21
- 239000010959 steel Substances 0.000 claims description 21
- 238000005520 cutting process Methods 0.000 claims description 9
- 238000005457 optimization Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004364 calculation method Methods 0.000 abstract description 3
- 230000001131 transforming effect Effects 0.000 abstract 1
- 238000005097 cold rolling Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004513 sizing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D25/00—Machines or arrangements for shearing stock while the latter is travelling otherwise than in the direction of the cut
- B23D25/12—Shearing machines with blades on coacting rotating drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D36/00—Control arrangements specially adapted for machines for shearing or similar cutting, or for sawing, stock which the latter is travelling otherwise than in the direction of the cut
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Metal Rolling (AREA)
- Shearing Machines (AREA)
Abstract
A method for determining the structural parameters of drum flying shears according to technological requirement includes such steps as creating a model, that is, the absolute value of the sum of the dynamic changes in the distance of the projected point of upper shearing edge top on the plane of lower shearing edge and the distance of the projected point of lower shearing edge top on the plane of upper shearing edge is smaller than or equal to the maximal allowance of the gap between upper and lower shears for the minimal thickness of plate to be sheared, optimizing calculation with the model, writing shearing models of design variables for 6 parameters to be determined, transforming the shearing models to target models, and based on target models to find out 6 parameters . Its advantages is high effect, resulting in higher sheared plate thickness up to 5.5 mm.
Description
What the present invention relates to is the design of a kind of flying shear mechanism, and especially a kind of method of deciding parameters of drum-type flying shears mechanism according to technological requirement belongs to the cutting field in the operation transportation class.
When determining mechanism design with diagram method, experimental method, analytic method or optimization, traditional connecting rod class flying shear mechanism all designs according to given trace, the technology that directly solves connecting rod class flying shear mechanism according to technological requirement seldom has introduction at home and abroad, in December, 1996 China " iron and steel " the 31st volume, the 12nd phase " are directly found the solution the flying shear mechanism parameter by technological requirement " author Liu Ran, Hu Guanghua introduced the parameter that solves connecting rod class flying shear mechanism and determined.But also do not have for a long time the professional in cylinder class flying shear mechanism under the prerequisite of the appearance and size that does not change equipment, mechanical electronic hydraulic interface size, again by technological requirement directly find the solution, the design organization parameter.Cylinder class and connecting rod class flying shearing machine all have very big difference at machine construction, scissors form, scissors principle, flying shear running orbit, and the shearing thickness of connecting rod class is significantly smaller than rolling class shearing thickness, by update search, do not find as yet so far cylinder class flying shear mechanism to patent and non-patent literature.Employing is target with the technological requirement, is criterion with the difference that allows, any given initial scheme, the method for definite flying shear mechanism parameter in the scope of constraints.
The objective of the invention is to overcome the deficiencies in the prior art and defective, proposed a kind ofly directly to decide six optimum structure parameters in the cylinder class flying shear mechanism design by technological requirement.
Technical scheme of the present invention is: the profile length and width size of all former electric systems, equipment, flying shear steel plate, and the condition of not changing such as whole interface sizes of mechanical electronic hydraulic equipment room, with original shear steel plate thickness from 0.3mm≤δ＜2.0mm, determine to expand to 0.3mm≤δ≤4.5mm, with cylinder class flying shearing machine is example, determine cylinder class flying shear mechanism parameter by these technological requirements, as: lower scissor blade radius of gyration R
D, upper scissor blade radius of gyration R
G, cutter shaft centre-to-centre spacing H
O, cutter shaft eccentric throw E, bottom knife oblique angle θ
C, cutter oblique angle θ
KDetermine that by technological requirement cylinder class flying shear mechanism parametric technique is after having analyzed the various features condition of shearing, think in the dynamic shearing process, upper and lower scissors side plane remains parallel or approximate parallel, this is to guarantee to realize good unique essential characteristics of shearing, this plane parallel displacement characteristic is exactly the necessary condition that drum-type is sheared technological requirement.So how this technology characteristics condition of specific implementation need be set up a model.The core of this model is distance (promptly the going up the cutting edge of a knife or a sword distance) Δ of upper knife edge summit subpoint on the lower scissors plane
1The minimum thickness of slab δ that will shear smaller or equal to equipment with the absolute value of the dynamic change sum of the distance of following blade summit subpoint on last scissors plane (promptly descend cutting edge of a knife or a sword apart from) Δ 2
MinThe maximum fluctuation amount Δ that allows of upper and lower knife face side clearance
Max, write as model and be exactly:
︱Δ
1±Δ
2︱≤Δ
max
Δ
MaxValue according to shearing minimum thickness of slab decision, usually Δ
Max=0.005～0.20mm because blade is generally very little to the oblique angle of y axle, is parallel to the X-axis line so ︱ Δ ︱ can regard as in addition.
Go for this model is referred in the optimization computation, six parameters will determining are write as the shear model of design variable,
X=[x
1, x
2..., x
6]
T=[R
D, R
G, H
O, E, θ
C, θ
K]
TIn the formula: X represents Euclidean space vector array.Convert shear model to object module again
With upper slitter regard 1 as, down cutter regard 2 as, upper knife edge summit P then
D(X
D, Y
D) point that projects to down on the knife face is P
12(X
12, Y
12), otherwise, be P
21(X
21, Y
21), X in the formula
12i, X
Gi, X
Di, X
21iBe the respective symbol in the above-mentioned projection relation, the value when i is illustrated in diverse location.
Do not allow the requirement that changes with some in addition, be classified as constraints, use existing optimization calculation procedure, can solve thus: the lower scissors radius of gyration
The last scissors radius of gyration
Cutter shaft centre-to-centre spacing
The cutter shaft eccentric throw
The bottom knife oblique angle
The cutter oblique angle
The present invention has produced significant effect and substantial characteristics, has solved the definite difficult problem of domestic and international helical edges cylinder class flying shear mechanism's structural parameters, the actual scope 0.2mm≤δ≤5.5mm that shears, δ
Max/ δ
Min=27.5 are higher than domestic and international 5～7 far away.Therefore use very conveniently, improved productivity ratio, flying shearing machine can be finished the task more than two, flying shear speed height, and additional dynamic power is little, flying shear part simple in structure, but strength and stiffness are big, and easy to operate, long service life.Outstanding effect is also being arranged aspect energy-conservation and the noise reduction.At shear steel plate thickness 0.2mm≤δ≤5.5mm, shear the wide B of maximum plate
Max=1920mm; Shear rate V=130,140,160,180,200,240,260,280,300m/min; Material is cold rolling, hot rolled steel plate σ
b＞65kg/mm
2, because invention does not need to regulate blade side clearance under the flying shear continually because of shearing the variation of thickness of slab, bring great convenience to production, realized several the unapproachable effects of cutter.
Below in conjunction with accompanying drawing the present invention is further described:
Fig. 1 flying shear mechanism general illustration
Fig. 2 structural parameters position view of the present invention
Fig. 3 blade cutting edge of a knife or a sword of the present invention is put mutual projection relation schematic diagram
As shown in Figure 1 and Figure 2, the present invention directly determines the lower scissor blade radius of gyration R of cylinder class flying shear mechanism according to technological requirement
D, upper scissor blade radius of gyration R
G, cutter shaft centre-to-centre spacing H
O, cutter shaft eccentric shaft E, bottom knife oblique angle θ
C, cutter oblique angle θ
KThe method of structural parameters, profile length and width size at original electric system, equipment, flying shear steel plate, and whole interfaces of mechanical electronic hydraulic equipment room are not to changing, and the thickness of original shearing steel plate determined to expand to 0.3mm≤δ≤4.5mm from original 0.3mm≤δ≤2.0mm, with cylinder class flying shearing machine is example, guarantee the requirement of the constant or approximately constant of upper and lower blade side gap width when having proposed to shear, as Fig. 3, cutting edge of a knife or a sword is apart from Δ in the requirement
1, with following cutting edge of a knife or a sword apart from the absolute value of Δ 2 dynamic change sums smaller or equal to shearing minimum thickness of slab δ
MinThe maximum fluctuation difference DELTA that allows
Max, promptly
︱Δ
1±Δ
2︱≤Δ
max
Δ
MaxValue according to shearing minimum thickness of slab decision, usually Δ
Max=0.005～0.20mm because blade is generally very little to the oblique angle of y axle, is parallel to the X-axis line so ︱ Δ ︱ can regard as in addition.
Go for this model is referred in the optimization computation, six parameters will deciding are write as the shear model of design variable,
X=[x
1, x
2..., x
6]
T=[R
D, R
G, H
O, E, θ
C, θ
K]
TIn the formula: X represents Euclidean space vector array.Convert shear model to object module again
With upper slitter regard 1 as, down cutter regard 2 as, upper knife edge summit P then
D(X
D, Y
D) point that projects to down on the knife face is P
12(X
12, Y
12), otherwise, be P
21(X
21, Y
21), X in the formula
12i, X
Gi, X
Di, X
21iBe the respective symbol in the above-mentioned projection relation, the value when i is illustrated in diverse location.
Do not allow the requirement that changes with some in addition, be classified as constraints, use existing optimization calculation procedure,
As shown in Figure 1 and Figure 2, structural parameters of the present invention are defined as the lower scissor blade radius of gyration
The upper scissor blade radius of gyration
Cutter shaft centre-to-centre spacing
The cutter shaft eccentric throw
The bottom knife oblique angle
The cutter oblique angle
According to the present invention to six structural parameters, following examples are provided: embodiment one: when process conditions are: shear steel plate thickness δ=1.2～7.0mm, shear steel plate width B=900～2500mm, cut lengths L=2000-18000mm, sizing accuracy Δ L=± 1.5mm, maximum is cut rate of shear degree V
Max=230m/min bottom knife helixangle
1=0.2 °, the cutter helixangle
2=0.2007 ° of material (cold rolling, hot rolled steel plate) σ
b＞65kg/mm
2Choosing structural parameters is:
H
O=472.50mm,E=9.85mm
R
D=236.50mm,RG=237.31mm
θ
C=0.70°,θK=2.80°
The effect of present embodiment reaches actual shearing steel plate δ
Max≤ 7.0mm is used for removing to carry out the bundling scissors in the continuous acid-washing unit of large-scale cold rolling band steel and the novel pickling unit, and its output can be multiplied; Being used for the finishing line of hot rolling, carry out cutting to length, to compare with connecting rod class flying shear, maximum operating speed can improve more than 2 times, and noise obviously reduces, and operation, easy maintenance are used very reliably, and the life-span rises appreciably.
Embodiment two
When process conditions are:
Shear steel plate thickness δ=0.3-4.5mm
Shear steel plate width B=900-1850mm, cut lengths L=1000-6000mm
Sizing accuracy Δ L=± 100mm
Maximum shear speed V
Max=300m/min
The bottom knife helixangle
1=0.65 °, cutter helical angle=0.652240 °
Material (cold rolling, hot rolled steel plate) σ
b＞65kg/mm
2
Choosing structural parameters is:
H
o=470mm,E=8.35mm
R
D=235mm,R
G=235.81mm
θ
C=0.5°,θ
K=2.0°
The present embodiment effect is very good, has sheared δ in having carried out 180 days production continuously
Min=0.3mm, δ
Max=4.5mm, the actual δ that shears
MaxCan reach 5.5mm, B
MaxThe steel plate of any specification of=1850mm, coupling has been selected V=130～300m/min for use, and inferior about 32000 times of total shear knife is produced about 1,100,000 tons of coil of strip, and use always is good, has the top standard at similar unit, and its performance has surmounted the index of similar unit.
Embodiment three
When process conditions are:
Shear steel plate thickness δ=0.1～1.0mm shears steel plate width B=500～1400mm,
Cut lengths L=400～4000mm, sizing accuracy Δ L=± 0.25～± 0.5mm,
Maximum shear speed V
Max=300m/min
The bottom knife helixangle
1=0.98 °, the cutter helixangle
1=0.9834 °
Material (cold rolling, hot rolled steel plate) σ
b＞65kg/mm
2
Choosing structural parameters is:
H
O=466.50mm,E=7.35mm
R
D=233.20mm,R
G=234.01mm
θ
C=0.40°,θ
K=1.6°
Present embodiment also has good shear effect, the shear rate height, and additional dynamic power is little, improved shear ability significantly, the shearing area polishing plays a positive role to reducing the steel plate division, use very conveniently, improved production efficiency, flying shearing machine have been finished former workload more than two.
Claims (2)
1, a kind of method of deciding parameters of drum-type flying shears mechanism according to technological requirement is characterized in that:
1. set up a model by technological requirement, promptly distance (promptly the going up the cutting edge of a knife or a sword distance) Δ of subpoint is ended on the upper knife edge summit on the lower scissors plane
1Distance (promptly descending the cutting edge of a knife or a sword point) Δ with following blade summit subpoint on last scissors plane
2The absolute value of the dynamic change sum minimum thickness of slab δ that will shear smaller or equal to equipment
MinThe maximum fluctuation amount Δ that allows of upper and lower knife face side clearance
Max, promptly
︱Δ
1±Δ
2︱≤Δ
max，
2. model is referred in the optimization computation and go, six parameters will determining are write as the shear model of design variable, promptly
X=[x
1,x
2,…,x
6]
T=[R
D,R
G,H
O,E,θ
C,θ
K]
T
3. further convert shear model to object module, promptly
4. according to object module, obtain lower scissor blade radius of gyration R respectively
D, upper scissor blade radius of gyration RG, cutter shaft centre-to-centre spacing Ho, cutter shaft eccentric shaft E, bottom knife oblique angle θ
C, cutter oblique angle θ
K
2, the method for this deciding parameters of drum-type flying shears mechanism according to technological requirement according to claim 1, its feature are that also the thickness range of shearing steel plate determines to expand to 0.3mm≤δ≤4.5mm from 0.3mm≤δ≤2.0mm.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98126309 CN1065160C (en) | 1998-12-30 | 1998-12-30 | Method for deciding parameters of drum-type flying shears mechanism according to technological requirement |
| JP2000592098A JP2002534276A (en) | 1998-12-30 | 1999-12-29 | How to determine the parameters of roller-type shear mechanism according to machining requirements |
| DE19983858T DE19983858B4 (en) | 1998-12-30 | 1999-12-29 | A method of adjusting parameters of a drum-type flying shears to a desired maximum thickness of the material to be cut |
| PCT/CN1999/000221 WO2000040361A1 (en) | 1998-12-30 | 1999-12-29 | A method for determining parameters of a rolling shear mechanism according to technical requirements |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98126309 CN1065160C (en) | 1998-12-30 | 1998-12-30 | Method for deciding parameters of drum-type flying shears mechanism according to technological requirement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1227779A true CN1227779A (en) | 1999-09-08 |
| CN1065160C CN1065160C (en) | 2001-05-02 |
Family
ID=5229601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98126309 Expired - Lifetime CN1065160C (en) | 1998-12-30 | 1998-12-30 | Method for deciding parameters of drum-type flying shears mechanism according to technological requirement |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2002534276A (en) |
| CN (1) | CN1065160C (en) |
| DE (1) | DE19983858B4 (en) |
| WO (1) | WO2000040361A1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699415A (en) * | 2012-05-04 | 2012-10-03 | 中冶南方工程技术有限公司 | Length designing method of crank connecting rod type flying shear adjusting screw rod |
| CN105382331A (en) * | 2015-12-22 | 2016-03-09 | 大连华冶联自动化有限公司 | Flying shear control method |
| CN106055796A (en) * | 2016-06-01 | 2016-10-26 | 中国重型机械研究院股份公司 | Drum flying shear transmission design parameter calculation method based on minimum target cut lengths |
| CN108705586A (en) * | 2018-08-17 | 2018-10-26 | 泉州大昌纸品机械制造有限公司 | A kind of scissors helical tooth blade |
| CN109926640A (en) * | 2019-03-29 | 2019-06-25 | 河海大学常州校区 | A kind of adjusting method of roller class flying shearing machine spiral scissors |
| CN114888346A (en) * | 2022-05-24 | 2022-08-12 | 中国重型机械研究院股份公司 | Novel system and method for adjusting side clearance uniformity of spiral shear blade |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111723476B (en) * | 2020-06-04 | 2024-09-03 | 中国重型机械研究院股份公司 | Modeling method for shearing torque of oblique shearing blade scrap shears |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU998016A1 (en) * | 1981-11-04 | 1983-02-23 | Всесоюзный Заочный Политехнический Институт | Paralellogram-type flying shears |
| DE3214513A1 (en) * | 1982-04-20 | 1983-12-08 | Mannesmann AG, 4000 Düsseldorf | FLYING SCISSORS, ESPECIALLY DRUM SCISSORS |
| CN1038019C (en) * | 1994-08-09 | 1998-04-15 | 何威 | Slide link crank fly scissors and fly scissors self adaption uniform velocity method |
| JP3271519B2 (en) * | 1996-06-24 | 2002-04-02 | ナスコ株式会社 | Control method of rotary traveling cutting machine |
| JP3360716B2 (en) * | 1997-04-17 | 2002-12-24 | 川崎製鉄株式会社 | Method and apparatus for cutting rolled material |
-
1998
- 1998-12-30 CN CN 98126309 patent/CN1065160C/en not_active Expired - Lifetime
-
1999
- 1999-12-29 DE DE19983858T patent/DE19983858B4/en not_active Expired - Lifetime
- 1999-12-29 WO PCT/CN1999/000221 patent/WO2000040361A1/en not_active Ceased
- 1999-12-29 JP JP2000592098A patent/JP2002534276A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102699415A (en) * | 2012-05-04 | 2012-10-03 | 中冶南方工程技术有限公司 | Length designing method of crank connecting rod type flying shear adjusting screw rod |
| CN102699415B (en) * | 2012-05-04 | 2014-07-02 | 中冶南方工程技术有限公司 | Length designing method of crank connecting rod type flying shear adjusting screw rod |
| CN105382331A (en) * | 2015-12-22 | 2016-03-09 | 大连华冶联自动化有限公司 | Flying shear control method |
| CN105382331B (en) * | 2015-12-22 | 2017-07-21 | 大连华冶联自动化有限公司 | A kind of method of flying shear control |
| CN106055796A (en) * | 2016-06-01 | 2016-10-26 | 中国重型机械研究院股份公司 | Drum flying shear transmission design parameter calculation method based on minimum target cut lengths |
| CN106055796B (en) * | 2016-06-01 | 2019-05-10 | 中国重型机械研究院股份公司 | Drum type flying shear driven Design calculation method of parameters based on minimum target cut lengths |
| CN108705586A (en) * | 2018-08-17 | 2018-10-26 | 泉州大昌纸品机械制造有限公司 | A kind of scissors helical tooth blade |
| CN109926640A (en) * | 2019-03-29 | 2019-06-25 | 河海大学常州校区 | A kind of adjusting method of roller class flying shearing machine spiral scissors |
| CN109926640B (en) * | 2019-03-29 | 2020-06-09 | 河海大学常州校区 | Method for adjusting spiral cutting edge of roller type flying shear |
| CN114888346A (en) * | 2022-05-24 | 2022-08-12 | 中国重型机械研究院股份公司 | Novel system and method for adjusting side clearance uniformity of spiral shear blade |
| CN114888346B (en) * | 2022-05-24 | 2024-05-17 | 中国重型机械研究院股份公司 | Novel spiral shear blade side gap uniformity adjustment system and adjustment method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000040361A1 (en) | 2000-07-13 |
| DE19983858T1 (en) | 2002-02-14 |
| CN1065160C (en) | 2001-05-02 |
| DE19983858B4 (en) | 2011-01-27 |
| JP2002534276A (en) | 2002-10-15 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD; BA Free format text: FORMER NAME OR ADDRESS: BAOSHAN STEEL GROUP IRON AND STEEL CO LTD; BAOSTEEL GROUP XI'AN HEAVY MACHINERY RESEARCH INSTITUTE Owner name: BAOSHAN IRON & STEEL CO., LTD.; BAOSTEEL GROUP XI' Free format text: FORMER NAME OR ADDRESS: SHANGHAI BAO STEEL GROUP IRON AND STEEL CO LTD; BAOSTEEL GROUP XI'AN HEAVY MACHINERY RESEARCH INSTITUTE |
|
| CP01 | Change in the name or title of a patent holder |
Address after: Orchard, Fujin Road, Baoshan District, Shanghai Patentee after: BAOSHAN IRON & STEEL CO.,LTD. Patentee after: Xi'an Heavy Machinery Research Institute of Baosteel Group Address before: No. 370 Pu circuit, Shanghai, Pudong New Area Patentee before: Baosteel Group Corporation Patentee before: Xi'an Heavy Machinery Research Institute of Baosteel Group |
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| CP03 | Change of name, title or address |
Address after: 200122 No. 370 Pu circuit, Shanghai, Pudong New Area Patentee after: BAOSHAN IRON & STEEL Co.,Ltd. Patentee after: Xi'an Heavy Machinery Research Institute of Baosteel Group Address before: 201900 No. 1, Middle Road, Baoshan District, Shanghai Patentee before: BAOSHAN IRON & STEEL CO.,LTD. Patentee before: Xi'an Heavy Machinery Research Institute of Baosteel Group |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20010502 |