CN110480255A - A method of bilateral scissors burr, which is reduced, for slab generates - Google Patents
A method of bilateral scissors burr, which is reduced, for slab generates Download PDFInfo
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- CN110480255A CN110480255A CN201810459190.1A CN201810459190A CN110480255A CN 110480255 A CN110480255 A CN 110480255A CN 201810459190 A CN201810459190 A CN 201810459190A CN 110480255 A CN110480255 A CN 110480255A
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- bilateral scissors
- burr
- scissor blade
- cutting edge
- slab
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Scissors And Nippers (AREA)
- Shearing Machines (AREA)
Abstract
The method that bilateral scissors burr generates is reduced for slab the invention discloses a kind of, comprising: horizontal distance Gap=(10%~11%) * t* α+λ between the setting upper and lower cutting edge cutting edge plummet face of bilateral scissors；Measurement and judgement to the upper and lower cutting edge installation level of bilateral scissors: after changing cutter installation, the blade clearance value of three corresponding points corresponding to the main driving angle hand of dial scale of bilateral scissors must be measured respectively, and any two gap width is taken to do sums poor ε, arithmetical difference ε > 0.3~0.4mm is considered as upper lower scissor blade levelness and is unsatisfactory for requiring, must adjustment processing；Chamfered is carried out to bilateral scissors two sides lower scissor blade entrance side corner；It Angle Position side is bitten to bilateral scissors two sides upper scissor blade carries out chamfering and mill processing.For the present invention using multi-pronged, the mode of synthesis improvement restrained effectively the generation of burr, significant effect.
Description
Technical field
The present invention relates to metallurgy industry slab cutting fields, reduce bilateral scissors for slab more specifically to one kind
The method that burr generates.
Background technique
Slab production board has strict requirements and standard to its surface quality, slab shear line is easy to produce normal
See surface quality defect, such as: impression, burr indentation etc. usually require that abrasive machine reconditioning is manually used to handle, if after reconditioning
The position thickness is lower than production board order lower thickness limit, then the production board cannot meet terms of delivery, can only take off weight after contract
New rolling process is lost larger.In addition the steel plate relatively high for some surface quality requirements does not allow reconditioning even more, if produced
Then steel plate directly takes off contract to raw drawbacks described above.
Bilateral to be cut to one of most important shearing machine of slab shear line, for the order size shearing steel plate by client two
Side.As shown in Figure 1, being found in slab actual production, bilateral scissors (6 direction of travel of steel plate such as arrow during shearing steel plate 6
It is shown) it is easy to produce tiny burr 3, when rolling shearing steel plate 6, small burr 3 is easily taken up to turn over to be fallen bilateral scissors upper scissor blade 2
To the two sides edge of 6 upper surface of steel plate.Steel plate 6 in transmission process as indicated by the arrow small burr 3 through being pressed from both sides on subsequent 2#
Roller 4 is sent to roll, and then small burr 3 is pressed into 6 surface of steel plate and forms the apparent fine strip shape impression of pattern.Similarly, tiny burr
Or tiny metal fragment is also easily fallen on bilateral scissors platform or lower scissor blade 5 by band, and then causes the steel plate of subsequent shearing
The indentation of lower surface overall length periodicity burr, if it find that must be later, easily cause the serious consequence of quality of lot defect.As above
Impression caused by the small burr 3 is pressed into must add reconditioning in rear process and carry out redemption processing, this is to live logistics, production group
Knitting etc. can all produce bigger effect.Further, Contracts Division can only be taken off if depth of cup is beyond thickness deviation allowed band
Reason, causes greater loss, also directly influences the timeliness of contract completion.
In conclusion being easy to produce burr during bilateral scissors shearing steel plate is that burr is caused to be pressed into the basic of mass defect
Reason, it would be highly desirable to solve.
In the prior art, as number of patent application 201020531036.X discloses, " a kind of steel plate shearing prevents burr to be pressed into
Device " is equipped with burr brush made of Ф 40mm high-temp.-resistant rubber duct in bilateral scissors front panel bottom；By the caliber of wind scavenging conduit by
Ф 10mm is expanded to Ф 50mm, and the exhaust vent of wind scavenging conduit is changed to tuyere, and increase considerably and carry out air quantity.The device is in glue
Under the collective effect of pipe burr brushing brush and tuyere purging, deburred is gone out into surface of steel plate, steel can be reduced to a certain extent
The indentation of plate burr.But the device is disadvantageous in that: the device belongs to post property, i.e., to the burr generated
Wiper and purging are carried out by burr brush and tuyere blow device, inhibits the generation of shear burr not from essential source,
In addition the device is easy to gather burr in burr brush position, causes the subsequent possibility being pressed into.
Summary of the invention
In view of the above defects of the prior art, the object of the present invention is to provide one kind reduces bilateral scissors for slab
The method that burr generates, use is multi-pronged, and the mode of synthesis improvement restrained effectively the generation of burr, significant effect.
To achieve the above object, the present invention adopts the following technical scheme:
A method of bilateral scissors burr, which is reduced, for slab generates, comprising:
1) the horizontal distance Gap between the upper and lower cutting edge cutting edge plummet face of bilateral scissors is set:
Gap=(10%~11%) * t* α+λ,
In above-mentioned formula, t is the rolling thickness to shearing steel plate, and α is the TS correction factor to shearing steel plate, and λ is cutting edge
Wear-compensating correction value,
TS is tensile strength, unit Mpa；
2) measurement and judgement to the upper and lower cutting edge installation level of bilateral scissors:
Changing cutter installation after, it is necessary to respectively measure the main driving angle hand of dial scale of bilateral scissors corresponding to three it is right
The blade clearance value that should be put, and any two gap width is taken to do sums poor ε, arithmetical difference ε > 0.3~0.4mm is considered as upper lower scissor blade water
Pingdu is unsatisfactory for requiring, must adjustment processing；
3) chamfered is carried out to bilateral scissors two sides lower scissor blade entrance side corner；
4) it Angle Position side is bitten to bilateral scissors two sides upper scissor blade carries out chamfering and mill processing.
The α presses following standard value:
0Mpa≤TS≤600Mpa, α=0.9~1.0；
600Mpa < TS≤800Mpa, α=0.8~0.9；
800Mpa < TS≤1200Mpa, α=0.6~0.7.
The λ presses following standard value: bilateral scissors 10,000 knives of every shearing, compensates -0.1~-0.2mm.
Three corresponding points are respectively the position of 120 degree, 150 degree and 180 degree on angle hand of dial scale.
The chamfering of the lower scissor blade entrance side corner is θ=30~40 degree, depth of chamfering d=5~8mm.
The chamfering that the upper scissor blade bites Angle Position side is milled length l=200~250mm, and height h=40~
50mm, depth s=0.2~0.4mm.
It is provided by the present invention a kind of the side that bilateral scissors burr generates to be reduced for slab in the above technical solution
Method, by setting most reasonable double-sided shear blades gap, formulating lower scissor blade installation level measurement method and judgement on bilateral scissors
Standard, bilateral scissors two sides lower scissor blade (including cutting edge box) entrance side corner chamfering, bilateral scissors two sides upper scissor blade bite Angle Position side
Surface chamfer mill four aspect complex arts improvement, it is multi-pronged, can highly desirable inhibit and reduce bilateral scissors in shearing steel plate
Burr phenomena is generated in the process, and then the mass defect of burr indentation is substantially effectively reduced from source.For improving steel plate
Quality simplifies scene logistics, reduces process cost etc. and plays the role of very active and effective, effect stability and continues reliable.
Detailed description of the invention
Fig. 1 is the schematic diagram of slab bilateral scissors shearing steel plate；
Fig. 2 is the schematic diagram of the horizontal clearance between the upper and lower cutting edge of bilateral scissors of the present invention；
Fig. 3 is the schematic diagram of the measurement point of bilateral scissors；
Fig. 4 is the schematic diagram that steel plate head hits bilateral scissors lower scissor blade；
Fig. 5 is the cross-sectional view in the direction A-A in Fig. 4；
Fig. 6 is the enlarged diagram of B location in Fig. 5；
Fig. 7 is the schematic diagram of bilateral scissors lower scissor blade chamfering of the present invention；
Fig. 8 is the enlarged diagram of location of C in Fig. 7；
Fig. 9 is the schematic diagram that chamfering is milled at bilateral scissors upper scissor blade nip angle of the present invention；
Figure 10 is the enlarged diagram of the position D in Fig. 9.
Specific embodiment
Technical solution of the present invention is further illustrated with reference to the accompanying drawings and examples.
A kind of method reducing the generation of bilateral scissors burr for slab provided by the present invention, comprising:
1) most reasonable double-sided shear blades gap is set
Most reasonable double-sided shear blades gap is set for ensuring to cut rear steel plate section quality, preventing cutting edge from grinding extremely
Damage, extension cutting edge service life etc. have very important effect.Further, if blade clearance setting is unreasonable, hold
Easily accelerate cutting edge passivation, the very coarse metal attachment of feel can be generated, be adhered by being embodied in lower scissor blade side, thus pole
It easily leads to bilateral scissors and generates tiny burr and metallic particles clast in shear history.These tiny burrs and particulate debris are easy
It is pressed into steel plate upper and lower surface and causes mass defect.Therefore most reasonable blade clearance must be set:
As shown in Fig. 2, double-sided shear blades gap refer between 2 cutting edge of upper scissor blade, 5 cutting edge vertical guide of lower scissor blade it is horizontal away from
From Gap:
Gap=(10%~11%) * t* α+λ,
In above-mentioned formula, t is the rolling thickness to shearing steel plate, and α is tensile strength (abbreviation TS, the list to shearing steel plate
Position is Mpa) correction factor, λ is cutting edge wear-compensating correction value.
Preferably, described currently press following standard value to the tensile strength correction factor α of shearing steel plate:
0Mpa≤TS≤600Mpa, α=0.9~1.0；
600Mpa < TS≤800Mpa, α=0.8~0.9；
800Mpa < TS≤1200Mpa, α=0.6~0.7.
Illustrate herein: allowing the maximum intensity of bilateral scissors shearing steel plate to please refer to equipment shear ability standard, different sets
It is had differences between standby.
Preferably, the cutting edge wear-compensating correction value λ presses following standard value: bilateral scissors 10,000 knives of every shearing, compensation-
0.1~-0.2mm.
2) bilateral scissors upper scissor blade 2,5 installation level measurement method of lower scissor blade and judgment criteria are formulated
Double-sided shear blades replacement should guarantee upper scissor blade 2 after installing as far as possible, the vertical guide of lower scissor blade 5 is parallel to each other, this is
Ensure to cut rear steel plate edge section quality and inhibits to generate the important of small burr in shear history to be means.
As shown in figure 3, after changing cutter installation mark must be measured to the blade clearance of diagram 3 positions A, B, C
It is fixed, it is considered as exception if the arithmetic difference in actual measurement gap is above standard, related adjustment processing must be carried out.
Preferably, the blade clearance measurement method is as follows:
(1) setting value of blade clearance is adjusted to 2.0mm, measurement diagram A point (corresponds to the main driving angle of bilateral scissors respectively
Hand of dial scale is about 120 degree), B point (corresponding scale be about 150 degree), between 3 points of C point (corresponding scale is about 180 degree)
Gap；
(2) any two of surveyed gap width are done sums difference, if arithmetical difference ε > 0.3~0.4mm, is considered as and cuts up and down
Sword installation level is unsatisfactory for requiring, palpus adjustment processing, such as in upper scissor blade box and the copper pad of shearing machine knife rest locking head position cushioning
Piece adjusts levelness.
3) chamfered is carried out to bilateral scissors two sides lower scissor blade (including cutting edge box) entrance side corner
As shown in Figures 3 to 5, steel plate 6 (conveys shown in direction of travel arrow as shown) under it in shearing transmission process
There are relative frictions between table two sides and bilateral scissors platform liner plate 7, especially for some deformed steel strips as detained under head
Steel plate friction is even more serious.Because this time grown knife platform liner plate 7 certainly exist abrasion due to thickness becomes smaller, when abrasion to a certain extent
The upper surface that will appear lower scissor blade 5 (the cutting edge box for including the case where fixed lower scissor blade 5) afterwards is higher by knife platform liner plate 7.Premenstrual work
What sequence cutting head haircut portion was transverse to can scratch even under its head section along corner when bilateral scissors shearing steel plate 6 enters shearing machine
Strike the fast mouth in corner of 5 entrance side of lower scissor blade.Since the material hardness of cutting edge is very high, scratches and easily generate metal
Grain clast or small burr and the steel plate being fed forward take on cutting edge or knife platform, lack so as to cause the indentation of subsequent steel plate following table
It falls into.Since the defect is in steel plate following table, it is more difficult to check and find, therefore be easy to produce serious quality of lot problem.Thus must
The following technological improvement of palpus:
As shown in Fig. 7 to Fig. 8, new cutting edge must be to lower scissor blade 5 (including cutting edge box) entrance side corner before the replacement of upper machine
Chamfered is carried out, steel plate can be smoothly through when ensuring that lower scissor blade face is slightly higher by knife table top, chamfering angle size θ=30~
40 degree, depth of chamfering d=5~8mm.
4) it Angle Position side is bitten to bilateral scissors two sides upper scissor blade carries out chamfering and mill processing
The upper scissor blade 2 of bilateral scissors bites the lower right side of Angle Position (as shown in Figure 10) during rolling shearing steel plate
Camber line shearing motion is made with respect to the edge of steel plate in the vertical corner of top acute angle and cutting edge end face, which, which squeezes, scrapes steel plate
Tiny burr is easily generated when edge.In order to avoid burr generation:
As shown in Fig. 9 to Figure 10, the new cutting edge of bilateral scissors installs the side at preceding 2 nip angle of two sides upper scissor blade in upper machine must be into
Row chamfering is milled processing.Chamfering is milled length l=200~250mm, height h=40~50mm, chamfering mill depth s=0.2~
Answer smooth excessiveness in the side of 0.4mm, delta-shaped region of the region shaped like diagram of milling, the triangle grinding face and upper scissor blade.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above
Change, modification will all be fallen within the scope of claims of the present invention.
Claims (6)
1. a kind of reduce the method that bilateral scissors burr generates for slab characterized by comprising
1) the horizontal distance Gap between the upper and lower cutting edge cutting edge plummet face of bilateral scissors is set:
Gap=(10%~11%) * t* α+λ,
In above-mentioned formula, t is the rolling thickness to shearing steel plate, and α is the TS correction factor to shearing steel plate, and λ is cutting edge abrasion
Compensating approach value,
TS is tensile strength, unit Mpa；
2) measurement and judgement to the upper and lower cutting edge installation level of bilateral scissors:
After changing cutter installation, it is necessary to measure three corresponding points corresponding to the main driving angle hand of dial scale of bilateral scissors respectively
Blade clearance value, and any two gap width is taken to do sums poor ε, arithmetical difference ε > 0.3~0.4mm is considered as upper lower scissor blade levelness
It is unsatisfactory for requiring, it must adjustment processing；
3) chamfered is carried out to bilateral scissors two sides lower scissor blade entrance side corner；
4) it Angle Position side is bitten to bilateral scissors two sides upper scissor blade carries out chamfering and mill processing.
2. a kind of method for reducing the generation of bilateral scissors burr for slab as described in claim 1, it is characterised in that: described
α presses following standard value:
0Mpa≤TS≤600Mpa, α=0.9~1.0；
600Mpa < TS≤800Mpa, α=0.8~0.9；
800Mpa < TS≤1200Mpa, α=0.6~0.7.
3. a kind of method for reducing the generation of bilateral scissors burr for slab as described in claim 1, it is characterised in that: described
λ presses following standard value: bilateral scissors 10,000 knives of every shearing, compensates -0.1~-0.2mm.
4. a kind of method for reducing the generation of bilateral scissors burr for slab as described in claim 1, it is characterised in that: described
Three corresponding points are respectively the position of 120 degree, 150 degree and 180 degree on angle hand of dial scale.
5. a kind of method for reducing the generation of bilateral scissors burr for slab as described in claim 1, it is characterised in that: described
The chamfering of lower scissor blade entrance side corner is θ=30~40 degree, depth of chamfering d=5~8mm.
6. a kind of method for reducing the generation of bilateral scissors burr for slab as described in claim 1, it is characterised in that: described
The chamfering that upper scissor blade bites Angle Position side is milled length l=200~250mm, and height h=40~50mm, depth s=0.2~
0.4mm。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810459190.1A CN110480255B (en) | 2018-05-15 | 2018-05-15 | Method for reducing double-side shearing burrs of thick plate |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810459190.1A CN110480255B (en) | 2018-05-15 | 2018-05-15 | Method for reducing double-side shearing burrs of thick plate |
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| CN110480255B CN110480255B (en) | 2021-02-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113704905A (en) * | 2021-08-05 | 2021-11-26 | 格致汽车科技股份有限公司 | Mould surface engineering machine platform compensation deformation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05104146A (en) * | 1991-10-17 | 1993-04-27 | Sumitomo Metal Ind Ltd | Method for correcting defective sheared surface |
| CN101920356A (en) * | 2010-07-29 | 2010-12-22 | 重庆钢铁(集团)有限责任公司 | Double-sided shear for thick steel plate production and method thereof for automatic plate-shearing for roller way conveying |
| CN202539672U (en) * | 2012-03-08 | 2012-11-21 | 新疆八一钢铁股份有限公司 | Device for eliminating burrs shorn by double-side shears |
| CN103034199A (en) * | 2012-12-11 | 2013-04-10 | 济钢集团有限公司 | Control system and control method of bilateral scissors capable of fast shearing |
| CN103801566A (en) * | 2013-12-26 | 2014-05-21 | 宝钢发展有限公司 | Control method for reducing edge faults of hot rolled steel plate in line rolling process |
| CN106238506A (en) * | 2016-09-18 | 2016-12-21 | 舞阳钢铁有限责任公司 | A kind of method of quick measurement Double-side-shearing pinch roll |
-
2018
- 2018-05-15 CN CN201810459190.1A patent/CN110480255B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05104146A (en) * | 1991-10-17 | 1993-04-27 | Sumitomo Metal Ind Ltd | Method for correcting defective sheared surface |
| CN101920356A (en) * | 2010-07-29 | 2010-12-22 | 重庆钢铁(集团)有限责任公司 | Double-sided shear for thick steel plate production and method thereof for automatic plate-shearing for roller way conveying |
| CN202539672U (en) * | 2012-03-08 | 2012-11-21 | 新疆八一钢铁股份有限公司 | Device for eliminating burrs shorn by double-side shears |
| CN103034199A (en) * | 2012-12-11 | 2013-04-10 | 济钢集团有限公司 | Control system and control method of bilateral scissors capable of fast shearing |
| CN103801566A (en) * | 2013-12-26 | 2014-05-21 | 宝钢发展有限公司 | Control method for reducing edge faults of hot rolled steel plate in line rolling process |
| CN106238506A (en) * | 2016-09-18 | 2016-12-21 | 舞阳钢铁有限责任公司 | A kind of method of quick measurement Double-side-shearing pinch roll |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113704905A (en) * | 2021-08-05 | 2021-11-26 | 格致汽车科技股份有限公司 | Mould surface engineering machine platform compensation deformation method |
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