CN106311750B - The pre- cutting of milling train and slitting pass - Google Patents
The pre- cutting of milling train and slitting pass Download PDFInfo
- Publication number
- CN106311750B CN106311750B CN201610790859.6A CN201610790859A CN106311750B CN 106311750 B CN106311750 B CN 106311750B CN 201610790859 A CN201610790859 A CN 201610790859A CN 106311750 B CN106311750 B CN 106311750B
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- Prior art keywords
- hole
- cutting
- molding
- connecting hole
- millimeters
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/028—Variable-width rolls
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- Physics & Mathematics (AREA)
- Geometry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Milling Processes (AREA)
- Drilling Tools (AREA)
Abstract
The invention discloses a kind of pre- cutting of milling train and slitting pass, the pre- cutting sky includes the connecting hole of molding hole and connection molding hole arranged side by side；The cutting hole includes the empty connecting hole of molding hole and connection molding arranged side by side；In the pre- cutting hole, molding hole is circular hole, and connecting hole is arranged between two molding holes；Described connecting hole or so is merged with two sides molding hole, connecting hole lower edges be arc top be oppositely arranged it is arc-shaped, with molding hole edge-smoothing transition；The ratio between the spacing of the connecting hole lower edges and the radius of circular arc are 3.56-3.67；In the cutting hole, molding hole is circular hole, and connecting hole is arranged between two molding holes；Described connecting hole or so is merged with two sides molding hole, connecting hole lower edges be arc top be oppositely arranged it is arc-shaped, with molding hole edge-smoothing transition；The center of described two molding holes is 24.16-32.179 away from the ratio between the radius with circular arc.
Description
Technical field
The present invention relates to a kind of design of section of rolling mill.
Background technique
A piece steel billet is rolled by roughing mills, intermediate mill, cuts rolled piece in mm finishing mill unit by the rolling of rod type steel
It is divided into two or two or more rolled pieces arranged side by side, referred to as splitting rolling.
Its specific process is first by heating steel billet, then by different milling trains from being sliced into cutting in advance and gradually roll
At.In the existing operation of rolling, a large amount of finished products crack when drawing cutting and are judged to useless.To find out its cause, discovery and pre- cutting hole
And the design of cutting hole has much relations.
Summary of the invention
In view of this, the present invention provides a kind of pre- cutting of milling train and slitting pass, by the pre-cut between rod type steel
The adjustment for dividing band and cutting belt shape, avoids cracking in pre- cutting and cutting.
In order to solve the above technical problems, the technical solution of the present invention is as follows: a kind of pre- cutting of milling train and slitting pass, described pre-
Cutting sky includes the connecting hole of molding hole and connection molding hole arranged side by side；The cutting hole includes molding arranged side by side
The connecting hole of hole and connection molding sky；In the pre- cutting hole, molding hole is circular hole, connecting hole setting two molding holes it
Between；Described connecting hole or so is merged with two sides molding hole, connecting hole lower edges be arc top be oppositely arranged it is arc-shaped, with molding
Bore edges smooth transition；The ratio between the spacing of the connecting hole lower edges and the radius of circular arc are 3.56-3.67；The cutting hole
In, molding hole is circular hole, and connecting hole is arranged between two molding holes；Described connecting hole or so is merged with two sides molding hole, even
Connect hole lower edges be arc top be oppositely arranged it is arc-shaped, with molding hole edge-smoothing transition；The center of described two molding holes
It is 24.16-32.179 away from the ratio between the radius with circular arc.
As a preference, the pre- cutting bore dia is 21.74 millimeters, the spacing of connecting hole lower edges is 13.34
Millimeter, the radius of circular arc are 3.63 millimeters.
As a preference, the cutting bore dia is 23 millimeters, molding hole center is away from being 26.7 millimeters, the radius of circular arc
It is 0.83 millimeter.
As a preference, the pre- cutting bore dia is 20.84 millimeters, the spacing of connecting hole lower edges is 12.48
Millimeter, the radius of circular arc are 3.57 millimeters.
As a preference, the cutting bore dia is 21.23 millimeters, molding hole center away from being 24.5 millimeters, circular arc
Radius is 0.9 millimeter.
As a preference, the pre- cutting bore dia is 17.6 millimeters, the spacing of connecting hole lower edges is 10.68 millis
Rice, the radius of circular arc are 3 millimeters.
As a preference, the cutting bore dia is 18.5 millimeters, molding hole center away from be 21.5 millimeters, circular arc partly
Diameter is 0.89 millimeter.
The invention has the beneficial effects that: the pre- cutting hole of milling train and cutting hole with above structure adjust pre- cutting band
With the shape of cutting band, the generation of crackle is greatly reduced in pre- cutting and cutting, yield rate is improved, has saved cost,
Improve economic benefit.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of pre- cutting hole.
Fig. 2 is the structural schematic diagram of cutting hole.
Marked in the figure: 1 molding hole, 2 connecting holes.R is the radius of circular arc, and H is the spacing of connecting hole lower edges, D two
The center of a molding hole away from.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, With reference to embodiment
The present invention is described in further detail.
As shown in Figure 1 and Figure 2, pre- cutting sky of the present invention includes molding hole 1 and connection molding hole 1 arranged side by side
Connecting hole 2；The cutting hole includes the empty connecting hole 2 of molding hole 1 and connection molding arranged side by side；The pre- cutting hole
In, molding hole 1 is circular hole, and connecting hole 2 is arranged between two molding holes 1；The connecting hole 2 or so melts with two sides molding hole 1
Close, 2 lower edges of connecting hole be arc top be oppositely arranged it is arc-shaped, with 1 edge-smoothing transition of molding hole；On the connecting hole 2
The ratio between the spacing of lower edge and the radius of circular arc are 3.56-3.67；In the cutting hole, molding hole 1 is circular hole, and connecting hole 2 is set
It sets between two molding holes 1；The connecting hole 2 or so is merged with two sides molding hole 1, and 2 lower edges of connecting hole are arc top phase
To the arc-shaped of setting, with 1 edge-smoothing transition of molding hole；The center of described two molding holes 1 is away from the ratio between the radius with circular arc
For 24.16-32.179.
Embodiment 1, the pre- cutting bore dia are 21.74 millimeters, and the spacing H of connecting hole lower edges is 13.34 millimeters,
The radius R of circular arc is 3.63 millimeters, H:R=3.67.The cutting bore dia be 23 millimeters, molding hole center away from for 26.7 in the least
Rice, the radius of circular arc are 0.83 millimeter, D:R=32.17.
Embodiment 2, the pre- cutting bore dia are 20.84 millimeters, and the spacing of connecting hole lower edges is 12.48 millimeters,
The radius of circular arc is 3.57 millimeters, H:R=3.57.The cutting bore dia be 21.23 millimeters, molding hole center away from for 24.5 in the least
Rice, the radius of circular arc are 0.9 millimeter, D:R=27.22.
Embodiment 3, the pre- cutting bore dia are 17.6 millimeters, and the spacing of connecting hole lower edges is 10.68 millimeters, circle
The radius of arc is 3 millimeters, H:R=3.56.The cutting bore dia is 18.5 millimeters, and molding hole center is justified away from being 21.5 millimeters
The radius of arc is 0.89 millimeter, H:R=24.16.
A point sword spacing is increased by improved pre- cutting hole, reduces the arc-shaped radius of connecting hole.Rolled piece is by pre-
After cutting hole, the pre- cutting band of formation does not take away more heat transfer by hole slot cooling water, improves the temperature at the pre- cutting band of rolled piece.In advance
Cutting band high temperature tearing is conducive to be easy to be pressed when entering next passes after cutting band is torn；Pre- cutting rolled piece, which enters, to be cut
Stability is preferable when point hole, is conducive to that adjustment control two line of rolled piece is poor, and two line finished sizes are more evenly.
The center of molding hole is reduced away from increasing the arc-shaped radius of connecting hole by improved cutting hole.So that cutting
Dividing tearing to take away, rolled piece center is closer, and rolled piece tearing band when entering next passes is more easily pressed, and optimization front and back is cut
Sub-material type area is constant, and material type shape becomes oval from the peach heart, and when rolled piece enters next passes, cutting band is easy overturning extremely
Groove bottom is processed pressing；Cutting sword wearability is good, and cutting sword does not allow easy to wear or chip off-falling, avoid due to cutting sharpen damage or
Chip off-falling causes the finished product cracks of rolled piece cutting band generation lack of standardization.
When following table is the pass that 2013 are not used in the present invention, useless situation is sentenced by our factory.
From after using pass provided by the invention, there is no crossing cutting crackle.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention, protection scope of the present invention should be defined by the scope defined by the claims..For the art
For those of ordinary skill, without departing from the spirit and scope of the present invention, several improvements and modifications can also be made, these change
It also should be regarded as protection scope of the present invention into retouching.
Claims (5)
1. a kind of pre- cutting of milling train and slitting pass, the pre- cutting sky includes molding hole and connection molding hole arranged side by side
Connecting hole；The cutting hole includes the empty connecting hole of molding hole and connection molding arranged side by side；It is characterized by: described pre-
In cutting hole, molding hole is circular hole, and connecting hole is arranged between two molding holes；Described connecting hole or so melts with two sides molding hole
Close, connecting hole lower edges be arc top be oppositely arranged it is arc-shaped, with molding hole edge-smoothing transition；It is following on the connecting hole
The ratio between the spacing of edge and the radius of circular arc are 3.57-3.67；In the cutting hole, molding hole is circular hole, and connecting hole is arranged two
Between a molding hole；Described connecting hole or so is merged with two sides molding hole, and connecting hole lower edges are the circle that arc top is oppositely arranged
Arc, with molding hole edge-smoothing transition；The center of described two molding holes is 27.22- away from the ratio between the radius with circular arc
32.17。
2. a kind of pre- cutting of milling train according to claim 1 and slitting pass, it is characterised in that: the pre- cutting bore dia
It is 21.74 millimeters, the spacing of connecting hole lower edges is 13.34 millimeters, and the radius of circular arc is 3.63 millimeters.
3. a kind of pre- cutting of milling train according to claim 2 and slitting pass, it is characterised in that: the cutting bore dia is
23 millimeters, away from being 26.7 millimeters, the radius of circular arc is 0.83 millimeter at molding hole center.
4. a kind of pre- cutting of milling train according to claim 1 and slitting pass, it is characterised in that: the pre- cutting bore dia
It is 20.84 millimeters, the spacing of connecting hole lower edges is 12.48 millimeters, and the radius of circular arc is 3.57 millimeters.
5. a kind of pre- cutting of milling train according to claim 4 and slitting pass, it is characterised in that: the cutting bore dia is
21.23 millimeters, away from being 24.5 millimeters, the radius of circular arc is 0.9 millimeter at molding hole center.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610790859.6A CN106311750B (en) | 2016-08-31 | 2016-08-31 | The pre- cutting of milling train and slitting pass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610790859.6A CN106311750B (en) | 2016-08-31 | 2016-08-31 | The pre- cutting of milling train and slitting pass |
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| Publication Number | Publication Date |
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| CN106311750A CN106311750A (en) | 2017-01-11 |
| CN106311750B true CN106311750B (en) | 2019-05-31 |
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| CN201610790859.6A Active CN106311750B (en) | 2016-08-31 | 2016-08-31 | The pre- cutting of milling train and slitting pass |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107671121A (en) * | 2017-09-29 | 2018-02-09 | 四川德胜集团钒钛有限公司 | A kind of rolling groove structure |
| CN109127725B (en) * | 2018-08-17 | 2020-06-19 | 石横特钢集团有限公司 | Round steel cutting and rolling process |
| CN112775194B (en) * | 2021-04-07 | 2022-03-04 | 江苏省镔鑫钢铁集团有限公司 | Preparation process and preparation device of multi-line splitting guide splitting rolled piece |
| CN113083885A (en) * | 2021-04-12 | 2021-07-09 | 首钢长治钢铁有限公司 | Joist steel material and production method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306432A (en) * | 2007-05-18 | 2008-11-19 | 新疆八一钢铁股份有限公司 | Round steel splitting rolling technique |
| CN102814320A (en) * | 2011-06-10 | 2012-12-12 | 新疆八一钢铁股份有限公司 | Four-line splitting rolling technology for fai 12mm round steel |
| CN102989763A (en) * | 2012-11-26 | 2013-03-27 | 首钢总公司 | Production method of four-segment high-strength aseismic reinforcement |
| 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 |
| CN103722008A (en) * | 2013-12-20 | 2014-04-16 | 天津钢铁集团有限公司 | Slitting rolling method for 19mm deformed steel bars |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3091055B2 (en) * | 1993-07-07 | 2000-09-25 | 株式会社神戸製鋼所 | Multi-slit rolling method |
-
2016
- 2016-08-31 CN CN201610790859.6A patent/CN106311750B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101306432A (en) * | 2007-05-18 | 2008-11-19 | 新疆八一钢铁股份有限公司 | Round steel splitting rolling technique |
| CN102814320A (en) * | 2011-06-10 | 2012-12-12 | 新疆八一钢铁股份有限公司 | Four-line splitting rolling technology for fai 12mm round steel |
| CN102989763A (en) * | 2012-11-26 | 2013-03-27 | 首钢总公司 | Production method of four-segment high-strength aseismic reinforcement |
| 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 |
| CN103722008A (en) * | 2013-12-20 | 2014-04-16 | 天津钢铁集团有限公司 | Slitting rolling method for 19mm deformed steel bars |
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| CN106311750A (en) | 2017-01-11 |
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