CN201618721U - Grouped three-roll size reducing mill - Google Patents
Grouped three-roll size reducing mill Download PDFInfo
- Publication number
- CN201618721U CN201618721U CN2009203523015U CN200920352301U CN201618721U CN 201618721 U CN201618721 U CN 201618721U CN 2009203523015 U CN2009203523015 U CN 2009203523015U CN 200920352301 U CN200920352301 U CN 200920352301U CN 201618721 U CN201618721 U CN 201618721U
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- roll
- rolling
- roll stand
- group
- reducing mill
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Abstract
The utility model discloses a grouped three-roll size reducing mill, which resolves the technical problem that hexagonal bore is easy to cause when a three-roll size reducing mill is used for rolling steel pipes, and comprises roll stands and three rolls forming a 120-degree angle with one another; two roll stands sequentially form a rolling unit from a first roll stand to the last roll stand along a rolling line; and the inclined angle formed by roll gaps of corresponding rolls of two roll stands in each rolling unit is 60 degrees. The grouped three-roll size reducing mill is characterized in that a plurality of rolling groups are arranged from the first roll stand to the last roll stand along the rolling line; the quantity of rolling units forming each rolling group is identical; and an inclined angle formed by the roll gap of the roll of each roll stand in each rolling group and the roll gap of the corresponding roll of each roll stand in the adjacent rolling group is 30 degrees. The grouped three-roll size reducing mill improves quality of reducing size for thick-wall steel tubes.
Description
Technical field
The present invention relates to a kind of metallurgy industry seamless steel pipe production, particularly relate to a kind of size-reducing mill that is used for seamless steel pipe.
Background technology
At present, in smelter seamless steel pipe hot-rolling production equipment, three-roll size reducing mill is one of main finishing equipment of seamless steel pipe hot-rolling production, and it is used for the steel pipe behind the tandem rolling is realized that steel pipe is decided tube reducing and rule are round.Roll stand is made up of 3 rolls, and three rolls are mutually 120 °, adjacent frame interlaced arrangement, and the roll gap angle is 60 °.Because the footpath of the roller on the pass width is poor and the pass width on sizing reduction poor, make the rolling steel pipe of three-roll size reducing mill be easy to generate " interior six sides ".When using many and wall thickness steel pipe of frame number thicker, interior six sides are just even more serious, have a strong impact on pipe quality.
Summary of the invention
Grouping three-roller size-reducing mill provided by the invention has solved existing three-roll size reducing mill is easy to generate interior six sides when rolled steel tube technical problem.
The present invention overcomes the above problems by following scheme:
A kind of grouping three-roller size-reducing mill, comprise roll stand and be installed on the roll stand three 120 ° rolls each other, along the roll line direction since first roll stand till the last roll stand, two roll stands are formed a rolling unit successively, the angle of the corresponding roller gap of two roll stands in each rolling unit is 60 °, it is characterized in that: till a last roll unit, be provided with several rolling group along the roll line direction since the first roll unit, constitute each rolling unit number of rolling group and equate, and the roller gap of every roll stand in each rolling group respectively with adjacent rolling group in the corresponding roller gap of every roll stand between angle be 30 °.
Described rolling group is set to the 2-4 group.
Be provided with 1-4 described rolling unit in described each rolling group.
A kind of grouping three-roller size-reducing mill, comprise roll stand and be installed on the roll stand three 120 ° rolls each other, along the roll line direction since first roll stand till the last roll stand, two roll stands are formed a rolling unit successively, the angle of the corresponding roller gap of two roll stands in each rolling unit is 60 °, it is characterized in that: till a last roll unit, be provided with several rolling group along the roll line direction since the first roll unit, constitute each rolling unit number of rolling group and equate, and the roller gap of every roll stand in each rolling group respectively with adjacent rolling group in the corresponding roller gap of every roll stand between angle be 15 °.
Described rolling group is set to the 2-4 group.
Be provided with 1-4 described rolling unit in described each rolling group.
The present invention has improved the quality of thick walled steel tube being decided tube reducing, and the precision of wall thickness is improved greatly.
Description of drawings:
Fig. 1 is that rolling group of number of the present invention is that 2 groups of rolling units are 2 o'clock structure chart
The specific embodiment
A kind of grouping three-roller size-reducing mill, comprise roll stand and be installed on the roll stand three 120 ° rolls each other, along the roll line direction since first roll stand till the last roll stand, two roll stands are formed a rolling unit successively, the angle of the corresponding roller gap of two roll stands in each rolling unit is 60 °, it is characterized in that: till a last roll unit, be provided with several rolling group along the roll line direction since the first roll unit, constitute each rolling unit number of rolling group and equate, and the roller gap of every roll stand in each rolling group respectively with adjacent rolling group in the corresponding roller gap of every roll stand between angle be 30 °.
Described rolling group is set to the 2-4 group.
Be provided with 1-4 described rolling unit in described each rolling group.
A kind of grouping three-roller size-reducing mill, comprise roll stand and be installed on the roll stand three 120 ° rolls each other, along the roll line direction since first roll stand till the last roll stand, two roll stands are formed a rolling unit successively, the angle of the corresponding roller gap of two roll stands in each rolling unit is 60 °, it is characterized in that: till a last roll unit, be provided with several rolling group along the roll line direction since the first roll unit, constitute each rolling unit number of rolling group and equate, and the roller gap of every roll stand in each rolling group respectively with adjacent rolling group in the corresponding roller gap of every roll stand between angle be 15 °.
Described rolling group is set to the 2-4 group.
Be provided with 1-4 described rolling unit in described each rolling group.
The present invention is applicable to that total frame counts two roller diameter fixing and reducing machines of 2-32 frame, is specially adapted to two roller diameter fixing and reducing machines of 12 frames.
Claims (6)
1. grouping three-roller size-reducing mill, comprise roll stand and be installed on the roll stand three 120 ° rolls each other, along the roll line direction since first roll stand till the last roll stand, two roll stands are formed a rolling unit successively, the angle of the corresponding roller gap of two roll stands in each rolling unit is 60 °, it is characterized in that: till a last roll unit, be provided with several rolling group along the roll line direction since the first roll unit, constitute each rolling unit number of rolling group and equate, and the roller gap of every roll stand in each rolling group respectively with adjacent rolling group in the corresponding roller gap of every roll stand between angle be 30 °.
2. grouping three-roller size-reducing mill according to claim 1 is characterized in that: described rolling group is set to the 2-4 group.
3. grouping three-roller size-reducing mill according to claim 2 is characterized in that: be provided with 1-4 described rolling unit in described each rolling group.
4. grouping three-roller size-reducing mill, comprise roll stand and be installed on the roll stand three 120 ° rolls each other, along the roll line direction since first roll stand till the last roll stand, two roll stands are formed a rolling unit successively, the angle of the corresponding roller gap of two roll stands in each rolling unit is 60 °, it is characterized in that: till a last roll unit, be provided with several rolling group along the roll line direction since the first roll unit, constitute each rolling unit number of rolling group and equate, and the roller gap of every roll stand in each rolling group respectively with adjacent rolling group in the corresponding roller gap of every roll stand between angle be 15 °.
5. grouping three-roller size-reducing mill according to claim 4 is characterized in that: described rolling group is set to the 2-4 group.
6. grouping three-roller size-reducing mill according to claim 5 is characterized in that: be provided with 1-4 described rolling unit in described each rolling group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203523015U CN201618721U (en) | 2009-12-23 | 2009-12-23 | Grouped three-roll size reducing mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203523015U CN201618721U (en) | 2009-12-23 | 2009-12-23 | Grouped three-roll size reducing mill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201618721U true CN201618721U (en) | 2010-11-03 |
Family
ID=43022178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203523015U Expired - Fee Related CN201618721U (en) | 2009-12-23 | 2009-12-23 | Grouped three-roll size reducing mill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201618721U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978065A (en) * | 2014-05-05 | 2014-08-13 | 苏州萃田精密机械有限公司 | High-precision sizing device |
-
2009
- 2009-12-23 CN CN2009203523015U patent/CN201618721U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103978065A (en) * | 2014-05-05 | 2014-08-13 | 苏州萃田精密机械有限公司 | High-precision sizing device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20131223 |