CN105032936B - A kind of slit rolling process - Google Patents
A kind of slit rolling process Download PDFInfo
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- CN105032936B CN105032936B CN201510368855.4A CN201510368855A CN105032936B CN 105032936 B CN105032936 B CN 105032936B CN 201510368855 A CN201510368855 A CN 201510368855A CN 105032936 B CN105032936 B CN 105032936B
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Abstract
The present invention discloses a kind of slit rolling process, including K6 flat rollings, K5 box fixed width passages, K4 pre-cut shunting time and K3 cutting passages, it is characterized in that, described K3 cutting passages use roll to include top pass and bottom pass, complete slitting pass is pieced together above and below top pass and bottom pass, top pass and bottom pass offer some grooves in correspondence position, formed between adjacent grooves and carve top, the pass that several round shape are formed after top pass and bottom pass split is arranged in parallel, patent merges interconnected to pass in the horizontal direction, the pass of both sides is sideline hole, middle pass is middle string holes, the area in sideline hole is more than or equal to the area of middle string holes.Slit rolling process of the present invention considers the influence of mill spring, when the area in sideline hole is more than or equal to the area of middle string holes can effectively control line it is poor；The sideline hole area of slitting pass is adjusted, line difference is can be controlled within 200mm, and negative bias difference is can be controlled within 1.0%.
Description
Technical field
The present invention relates to multi wire cutting rolling technology field, more particularly to a kind of slit rolling process.
Background technology
Splitting rolling is exactly that in the operation of rolling, steel billet is rolled into two or more section configurations by hole type design
Identical parallel connection part, is then cut into two or more section configuration identical along longitudinal direction by blank through cutting equipment and rolls
Part, and continue rolling until obtaining the rolling mill practice of finished product.Cutting band position burr, otch is irregular, is easily formed and folded after rolling,
Stocking surface quality is influenceed, when cutting method separates rolled piece in parallel, rolled piece is easily reversed, and influences rolled piece quality.Splitting rolling mistake
Cheng Zhong, because being influenceed by factors such as pass schedule parameter, groove abrasion, mill spring, guide and guard installations, each line workpiece measurement is not
Can be completely the same, show as there are four lines in length or three line lines are poor, the negative bias rate difference for showing as existing in weight is big.With
In upper influence factor, whether reasonable pass schedule parameter designing is, can produce considerable influence to segmentation lines difference and minus deviation.Cutting hole
Whether type can rationally influence rolled piece to tear effect in the thickness of connect band, width control system.It is wide, blocked up all to increase slitting wheel
Burden.It can be difficult to eliminate the influence that connect band is brought in rear passes simultaneously, be formed and folded on finished product, influence product matter
Amount；And connect band is excessively thin to reduce roll campaign.Existing slitting pass is under the conditions of identical rolls speed, the second stream of each line
Amount is different, ultimately results in line difference and the fluctuation of negative bias rate is larger, and there is also rolled piece at cutting band and do not cut clean situation, tear
Posterior synechia is opened on center line, the defect for center line folding finally occur has a strong impact on steel rolling quality, causes substantial amounts of finished product and sentence
It is useless.
The content of the invention
The technical problems to be solved by the invention and the technical assignment proposed are to be improved that there is provided one kind to prior art
Slit rolling process, the line difference and negative bias rate ripple of cutting can be caused by solving the dimensional structure of slitting pass traditional in current technology
It is dynamic big, the problem of center line fold defect is serious.
To solve above technical problem, the technical scheme is that：
A kind of slit rolling process, including K6 flat rollings, K5 box fixed widths passage, K4 pre-cut shunting time and K3 cuttings
Passage, it is characterised in that described K3 cutting passages use roll to include on top pass and bottom pass, top pass and bottom pass
Under piece together complete slitting pass, top pass and bottom pass offer shape between some grooves, adjacent grooves in correspondence position
Arranged in parallel into the pass for carving four round shape of formation after top, top pass and bottom pass split, patent merges pass in the horizontal direction
It is interconnected, the pass of both sides is sideline hole, middle pass is middle string holes, the area in sideline hole is more than or equal to the face of middle string holes
Product.Slit rolling process of the present invention carries out splitting rolling processing, line difference production to rolled piece using the roll of K3 cutting passages
Raw basic reason is cutting area of section, causes under the conditions of identical rolls speed, and each line second flow is different.Cutting hole
The pass in K3 holes determines the size of follow-up rolling second flow substantially, to pre- cutting K4 holes, box fixed width hole K5, plain-barreled roll K6 holes hole
Shape parameter is optimized, and the control of line difference is reached minimum level.
Further, described slit rolling process uses four slitting passes, and the overall width of four slitting passes in K3 is
63.4~64mm.Degree of filling is defined as with the overall width of four slitting passes, center line hole area and sideline hole area are calculated respectively,
Then it is poor with 90m finished products rolled piece conversion line, sideline hole area is adjusted, makes it as consistent with center line hole area as possible after being full of, root
According to constancy of volume theorem, it is 0 that line difference can be made in theory.
Further, when the area of described middle string holes is 163.86mm2, the area in sideline hole for 163.92~
164.936mm2；The area of middle string holes is 167.1mm2When, the area in sideline hole is 167.1~167.42mm2。
Further, the radius of described middle string holes is 6.9~7mm, and the radius in sideline hole is 7~7.1mm.
Further, the center spacing of two described middle string holes is 16.2mm, middle string holes and the center spacing in sideline hole
For 16.29mm.
Further, the edge strip of described top pass and bottom pass carves angle for 53.7~60 °, carve tip circle arc radius 0.7~
0.8mm。
Further, the top spacing of carving of described top pass and bottom pass is 1.15mm.
Further, the drafts thickness of described K6 flat rollings is 18.0mm.
Further, the wide aperture width of described K5 box fixed width passages is 55.5mm.
Further, cutting is carried out using slitting wheel after described K3 cutting passages, the fit-up gap of slitting wheel is
0.5mm。
Compared with prior art, the invention has the advantages that：
Slit rolling process of the present invention considers the influence of mill spring, and cutting hole is proved by areal calculation
K3 full level is to influence the principal element of four segmentation lines difference, can be with when the area in sideline hole is more than or equal to the area of middle string holes
Effective control line is poor；By adjusting the sideline hole area of slitting pass, so that the control difficulty of line difference is reduced, to finishing pass K6
~K3 passes carry out parameter optimization, and under 90m multiple lengths, the line differences of Φ 12 × 4 are can be controlled within 200mm, and negative bias difference is controllable
System is within 1.0%；
Improve roll, guide and guard assembling quality, it is ensured that the strict centering of the cutting wedge of slitting wheel and pass, prevent cutting uneven
Phenomenon, eliminates center line and folds, and improves finished surface quality, stable finished size.
Brief description of the drawings
Fig. 1 is structural representation of the invention；
Fig. 2 is the structural representation that slitting wheel coordinates with slitting pass；
Fig. 3 is the structural representation of three slitting passes.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
A kind of slit rolling process disclosed in the embodiment of the present invention, is solved because slitting pass causes line difference to be fluctuated with negative bias
It is larger, cause the random steel of cold bed, piling of steel, the bad control of many, the comprehensive negative bias of outside super national standard quality objection at flying shear, adjust difficulty
Problem, eliminates center line and folds, and improves finished surface quality, stable finished size.
As shown in Figure 1 to Figure 3, a kind of slit rolling process, including K6 flat rollings, K5 box fixed widths passage, K4 pre-cut
Shunting time and K3 cutting passages, wherein, described K3 cutting passages use roll to include top pass 1 and bottom pass 2, above roll
Groove 1 and bottom pass piece together complete slitting pass about 2, top pass 1 and bottom pass 2 offer some recessed in correspondence position
Formed between groove, adjacent grooves carve after top, top pass 1 and the split of bottom pass 2 four round shape of formation pass it is arranged in parallel, pass
Patent, which merges, in the horizontal direction is interconnected, and the pass of both sides is sideline hole 3, and middle pass is middle string holes 4, sideline hole 3
Area is more than or equal to the area of middle string holes 4.
In the present embodiment, degree of filling is defined as with the overall width L of four slitting passes, center line hole area S is calculated respectivelyZX
With sideline hole area SBX, it is then poor with 90m finished products rolled piece conversion line.In order to consider influence of the roll spring to line difference, point
It is other roll to be bounced in the case of 0 and 0.2mm, four segmentation lines differences are contrasted, and field results are as shown in table 1.
Table 1
Sideline hole area SBXMore than center line hole area SZXTo over-fill, sideline hole area SBXLess than center line hole area SZXFor
Charge less expires, and the control of L/2 values is in 31.7~31.9mm, and line difference control is minimum zone, when spring is 0, and line difference control is in 200mm
Within.By data and pass areal calculation result, carrying out analysis can draw, consider cutting hole K3 pass parameters with rolling
The influence of roller spring, the influence that four line splitting and rollings are over-filled to line difference is full less than charge less.It is poor to line in order to reduce full level
Influence, the method for the slitting pass K3 both sides line side wall angle of wedge can be increased, make to over-fill the influence to line difference and be preferably minimized journey
Degree.Sideline pass area can also be adjusted, makes it as consistent with center line area as possible after being full of, according to constancy of volume theorem, reason
It is 0 by can above make line difference, in actual production process, is influenceed by groove inconsistent or mill spring of wearing and tearing, accomplish volume not completely
Become, can not can, but still line difference can be adjusted optimally.
The slitting pass K3 both sides line side wall angle of wedge, or adjusting hole molded dimension parameter can be increased to reduce sideline pass face
Product, slit rolling process uses the overall width L selections of four slitting passes in four slitting passes, K3 to be 63.4~64mm.Center line
The area in hole 4 is 163.86mm2When, the area in sideline hole 3 is 163.92~164.936mm2；The area of middle string holes 4 is
167.1mm2When, the area in sideline hole 3 is 167.1~167.42mm2.The radius of middle string holes 4 is 6.9~7mm, the half of sideline hole 3
Footpath is 7~7.1mm.The center spacing of two middle string holes 4 is 16.2mm, and middle string holes 4 and the center spacing in sideline hole 3 are
16.29mm.The edge strip of top pass 1 and bottom pass 2 carves angle a for 53.7~60 °, carves tip circle arc radius r0.7~0.8mm.Top pass
1 pushes up spacing d for 1.15mm with carving for bottom pass 2.
K3 holes L values is reached critical full state, K6~K3 holes pass parameters carried out with modification and numerical computations repeatedly,
Obtain final optimum results.Wherein flat rolling K6 increases drafts, and 18.0mm is changed to by original 18.5mm；Reduce box
Fixed width K5 wide aperture width, 55.5mm is revised as by original 56mm.
Cutting is carried out using slitting wheel after K3 cutting passages, rolled piece, which tears rear intermediate product, to be occurred due to effect of inertia
Slight to reverse, we are simulated to the state after rolled piece torsion in slitting wheel, as shown in fig. 3, it was found that in the middle of slitting wheel
Interporal lacuna is larger, and disjunctor rolled piece makes center line rolled piece to enter slitting wheel avulsed while the wedge point of slitting wheel rolls cutting band
Cutting band becomes wide and thin, intermediate product both sides is produced the ears or side handles of a utensil, folding can be produced on finished product through twice time later, by cutting
Wheel wedge spacing is adjusted, while the medial surface angle of cutting wedge two is tuned up, as shown in Fig. 2 allowing intermediate product to exist
There is small chucking power in slitting wheel, it is ensured that center line rolled piece does not rotate when crossing steel, while slitting wheel fit-up gap is carried out by 0.5mm
Adjustment.
The slitting pass sizes of Φ 14mm tri- can be adjusted with same method, by adjusting material molded dimension, make slitting pass
Degree of filling overall width be 59.23mm, it is each line negative bias rate gap contracting less than 100mm that can make the difference control of the segmentation lines of Φ 14mm tri-
Within as low as 1.0%.
It the above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
The limitation of the present invention, protection scope of the present invention should be defined by claim limited range.For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, these change
Enter and retouch and also should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of slit rolling process, including K6 flat rollings, K5 box fixed widths passage, K4 pre-cut shunting time and K3 cuttings road
It is secondary, it is characterised in that described K3 cutting passages use roll include top pass (1) and bottom pass (2), top pass (1) and
Bottom pass (2) pieces together complete slitting pass up and down, and top pass (1) and bottom pass (2) offer some recessed in correspondence position
Formed between groove, adjacent grooves carve after top, top pass (1) and bottom pass (2) split four round shape of formation pass it is arranged in parallel,
Described top pass (1) and the edge strip of bottom pass (2) carve angle (a) for 53.7~60 °, carve 0.7~0.8mm of tip circle arc radius (r),
Patent merges interconnected to pass in the horizontal direction, and the pass of both sides is sideline hole (3), and middle pass is middle string holes (4), side
The area of string holes (3) is more than or equal to the area of middle string holes (4), and the area of described middle string holes (4) is 163.86mm2When, sideline
The area in hole (3) is 163.92~164.936mm2；The area of middle string holes (4) is 167.1mm2When, the area of sideline hole (3) is
167.1~167.42mm2；The center spacing of two adjacent middle string holes is 16.2mm, adjacent middle string holes with the hole of sideline
In the heart away from for 16.29mm.
2. slit rolling process according to claim 1, it is characterised in that described slit rolling process uses four cuttings
The overall width (L) of four slitting passes in pass, K3 is 63.4~64mm.
3. slit rolling process according to claim 1, it is characterised in that the radius of described middle string holes (4) is 6.9~
7mm, the radius of sideline hole (3) is 7~7.1mm.
4. slit rolling process according to claim 1, it is characterised in that described top pass (1) and bottom pass (2)
It is 1.15mm to carve top spacing (d).
5. slit rolling process according to claim 1, it is characterised in that the drafts thickness of described K6 flat rollings
For 18.0mm.
6. slit rolling process according to claim 1, it is characterised in that the wide aperture of described K5 box fixed width passages is wide
Spend for 55.5mm.
7. slit rolling process according to claim 1, it is characterised in that cutting is utilized after described K3 cutting passages
Wheel carries out cutting, and the fit-up gap of slitting wheel is 0.5mm.
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| CN201510368855.4A CN105032936B (en) | 2015-06-29 | 2015-06-29 | A kind of slit rolling process |
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| CN201510368855.4A CN105032936B (en) | 2015-06-29 | 2015-06-29 | A kind of slit rolling process |
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| CN105032936B true CN105032936B (en) | 2017-11-07 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421827A (en) * | 2018-04-07 | 2018-08-21 | 新疆八钢铁股份有限公司 | A kind of splitting rolling pass |
| CN110280591B (en) * | 2019-06-26 | 2020-09-11 | 安阳钢铁股份有限公司 | Multi-line segmentation rolling center line processing method for bar production controlled rolling process |
| CN112404131A (en) * | 2020-10-30 | 2021-02-26 | 张家港宏昌钢板有限公司 | Method for controlling strip uniformity of cutting pass of deformed steel bar |
| CN112676345B (en) * | 2021-01-21 | 2022-04-12 | 广东韶钢松山股份有限公司 | Processing method of hot-rolled ribbed steel bar |
| CN112792136A (en) * | 2021-01-29 | 2021-05-14 | 中冶华天南京工程技术有限公司 | Multi-segmentation rolling variable-aperture segmentation roller, multi-segmentation rolling variable-aperture segmentation rolling mill and rolling process |
| CN112845603A (en) * | 2021-02-01 | 2021-05-28 | 新疆八一钢铁股份有限公司 | Method for reducing phi 14 four-line split thread multiple-length drop |
| CN113333467B (en) * | 2021-05-17 | 2023-01-31 | 山东莱钢永锋钢铁有限公司 | Four-slitting pass system with phi 16 specifications for bars |
| CN113305147B (en) * | 2021-06-03 | 2022-05-17 | 燕山大学 | Multi-process machining device and method for rolling wide copper plate by copper bar |
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| CN103706632A (en) * | 2013-12-20 | 2014-04-09 | 天津钢铁集团有限公司 | Slitting rolling method of 13mm deformed steel bar |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69128432D1 (en) * | 1990-08-20 | 1998-01-22 | Nippon Kokan Kk | METHOD AND DEVICE FOR PRODUCING METAL BARS |
| JPH11300401A (en) * | 1998-04-17 | 1999-11-02 | Kobe Steel Ltd | Method for slitting/rolling multi-bar and device therefor |
| CN101530859A (en) * | 2008-03-12 | 2009-09-16 | 新疆八一钢铁股份有限公司 | 6-line splitting and rolling technology for deformed steel bar with small section |
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