CN114425564A - Six-section roll shape and three-roll mill for rolling non-ferrous metal - Google Patents
Six-section roll shape and three-roll mill for rolling non-ferrous metal Download PDFInfo
- Publication number
- CN114425564A CN114425564A CN202210229723.3A CN202210229723A CN114425564A CN 114425564 A CN114425564 A CN 114425564A CN 202210229723 A CN202210229723 A CN 202210229723A CN 114425564 A CN114425564 A CN 114425564A
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- section
- rolling
- roller body
- rotating shaft
- included angle
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- 238000005096 rolling process Methods 0.000 title claims abstract description 70
- 239000002184 metal Substances 0.000 title claims abstract description 43
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 43
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 title abstract description 15
- 238000005498 polishing Methods 0.000 claims abstract description 16
- -1 ferrous metals Chemical class 0.000 claims description 11
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 230000008569 process Effects 0.000 abstract description 5
- 239000004033 plastic Substances 0.000 abstract description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 230000001131 transforming effect Effects 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000009785 tube rolling Methods 0.000 description 1
Images
Classifications
-
- 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
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/12—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially parallel to the axis of the work
- B21B19/16—Rolling tubes without additional rollers arranged inside the tubes
Abstract
The invention relates to a six-section roll shape for rolling non-ferrous metal, comprising: the roller comprises a roller body, wherein a contact biting section, a rotary rolling section, a concentrated deformation section, a uniform section, a rounding section and a pipe polishing section are sequentially formed on the roller body from right to left, and the contact biting section, the rotary rolling section, the concentrated deformation section, the uniform section, the rounding section and the pipe polishing section are all conical surfaces. The contact gripping section, the rotary rolling section, the concentrated deformation section, the equalizing section, the rounding section and the pipe throwing section of the roller body sequentially realize the technical processes of gripping, concentrated deformation, uniform wall thickness, reducing and pipe throwing of a pierced billet in the non-ferrous metal rolling process. Three rollers of the hole pattern are distributed in 120-degree opposite angles, so that rolling forming of the pierced billet is realized; the method avoids the scratch and the crust of the auxiliary tool on the surface of the nonferrous metal, and realizes the rolling plastic forming of the nonferrous metal on the three-roller rolling by using the design roller surface of six sections.
Description
Technical Field
The invention relates to the field of non-ferrous metal thermoplastic deformation processing, in particular to a six-section roll shape and a three-roll mill for rolling non-ferrous metals.
Background
The rolling of non-ferrous metal in the seamless tube production process flow has higher technical requirements, is different from the rolling mode of a black seamless tube product, and adopts a three-roller rolling mill to roll and compare with a two-roller inclined tube rolling mill through technical tests, so that the quality of rolled pierced billets can be better, the quality of the inner and outer surfaces of the pierced billets and the geometric tolerance can be better, and the defects of surface scratches, inward folding and the like caused by auxiliary tools are reduced.
After a pierced billet is processed into a pipeline by a conventional three-high mill, three rollers of the three-high mill need to generate quick-opening displacement so as to enable the rollers to be separated from the pipeline, and the pipeline is conveniently thrown out of the three-high mill. This requires the existing three-roll mills to be equipped with quick-opening mechanisms to drive the rollers to move, which results in tail quality defects and no throw-out for the rolling of non-ferrous metals.
Meanwhile, the roll shape design of the conventional three-high mill can form a tail triangle at the tail end of a pipeline when a non-ferrous metal pipeline (such as a titanium alloy pipeline) is processed, and further the forming quality of the titanium non-ferrous metal pipeline is influenced.
Disclosure of Invention
The invention aims to solve the problems, provides a six-section roll shape for rolling non-ferrous metals and a three-roll mill, and solves the technical problems that the roll shape of the conventional three-roll mill cannot realize biting rotation, is blocked in rolling and can smoothly throw pipes when rolling non-ferrous metals.
A six-segment roll shape for rolling non-ferrous metals, comprising: the roller comprises a roller body, wherein a contact gripping section, a rotary rolling section, a variable collecting section, a rounding section and a pipe polishing section are sequentially formed on the roller body from right to left, and the contact gripping section, the rotary rolling section, the variable collecting section, the rounding section and the pipe polishing section are all conical surfaces.
Further, the included angle range of the bus of the contact biting section and the rotating shaft of the roller body is 7-9 degrees, the included angle range of the bus of the rotary rolling section and the rotating shaft of the roller body is 6-7 degrees, the included angle range of the bus of the collection section and the rotating shaft of the roller body is 12-18 degrees, the included angle range of the bus of the equalizing section and the rotating shaft of the roller body is 0-1 degree 0 degree, the included angle range of the bus of the rounding section and the rotating shaft of the roller body is 1-12' to 1 degree 50 degrees, and the included angle range of the bus of the throwing pipe section and the rotating shaft of the roller body is 5-6 degrees.
Further, the included angle between the bus of the contact biting section and the rotating shaft of the roller body is 7 degrees, the included angle between the bus of the rotary rolling section and the rotating shaft of the roller body is 6 degrees, the included angle between the bus of the concentrated section and the rotating shaft of the roller body is 14 degrees, the included angle between the bus of the uniform section and the rotating shaft of the roller body is 0 degree 50 degrees, the included angle between the bus of the rounding section and the rotating shaft of the roller body is 1 degree 12 degrees, and the included angle between the bus of the polishing section and the rotating shaft of the roller body is 6 degrees.
Further, the length ratio of the contact gripping section, the rotary rolling section, the collection and transformation section, the leveling section, the rounding section and the polishing section in the roller body along the direction of the rotating shaft is as follows: 4.2:4.0:6.0:1.0-1.7:6.96:2.0.
The three-roll mill using the six-section rolls for rolling the nonferrous metal further comprises three roll shafts, bearing seats and flange plates, wherein the three roll bodies are uniformly distributed on the periphery by taking a rolling central line as the center, the included angle between the rotating shaft of each roll body and the first plane where the rolling central line is located is 4 degrees 1' 12 degrees, the roll shafts penetrate through the roll bodies and are fixedly connected with the roll bodies, the roll shaft ends are connected with a main transmission universal shaft through the flange plates for power input, the bearing seats are fixedly connected with a main machine adjusting mechanism, the first plane is vertical to the second plane, the rolling central line and a drawing angle on the second plane form an included angle between the rotating shaft and the second plane, and the adjusting range of the drawing angle is 6-10 degrees.
Further, the pull-in angle is 8 °.
The invention has the following advantages:
1. the roller body mainly comprises two working sections: the device comprises an inlet section and an outlet section, wherein the inlet section is divided into three conical angles (namely a contact gripping section, a rotary rolling section and a collecting and transforming section), and the outlet section is divided into three conical angles (namely a leveling section, a rounding section and a polishing section); the contact gripping section, the rotary rolling section, the concentrated deformation section, the equalizing section, the rounding section and the pipe polishing section sequentially realize the technical processes of gripping, concentrated deformation, uniform wall thickness, reducing diameter, rounding and pipe polishing of the pierced billet in the non-ferrous metal rolling process. Three rollers are distributed at 120-degree opposite angles, so that rolling forming of pierced billets is realized; the method has the advantages that the scratch and the crusting of the auxiliary tool on the surface of the nonferrous metal are avoided, and the rolling plastic deformation of the nonferrous metal on the three-roll mill is realized;
2. the cast pipe section of the roller body can enable the non-ferrous metal pipeline after hot rolling to be smoothly cast out of the three-high mill, and a separate pipe stripping mechanism is not required to be additionally arranged for casting the pipe;
3. through the concentrated deformation section, the equalizing section and the rounding section of the roller body, the three-roller mill realizes the stable rolling of the nonferrous metal through the combination of micro concentrated deformation and equalizing process in the rolling process. Through a large number of test rolling, the roll shape design of the six-section roll shape for rolling the non-ferrous metal is suitable for the plastic property of the non-ferrous metal, and the designed deformation distribution of the six sections effectively solves the technical problem of tail end triangular of the tube body;
4. because the section is designed into 6-section roll shape, the design of the section more reasonably solves the technical problems that the roll shape of the conventional three-roll mill cannot realize biting rotation, and the tube is blocked and smoothly thrown in rolling when rolling nonferrous metals.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary of the invention, and that other embodiments can be derived from the drawings provided by those skilled in the art without inventive effort.
FIG. 1: a front view structure schematic diagram of the roller body;
FIG. 2: a schematic view of a partially enlarged structure at a;
FIG. 3: a partial enlarged structural schematic at B;
FIG. 4: a schematic partial structure diagram of a three-high mill;
FIG. 5: the sectional structure of the roller body is schematically shown (the rotating shaft is not sectioned);
FIG. 6: the structural schematic diagram of the roller body and the roller shaft is the first one;
FIG. 7: the structure of the roller body and the roller shaft is schematically shown in the second aspect.
Detailed Description
The invention is further illustrated by the following figures and examples:
reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
The first embodiment is as follows:
as shown in fig. 1 to 7, the present embodiment provides a six-segment roll shape for nonferrous metal rolling, including: the roller comprises a roller body 1, wherein a contact biting section 11, a rotary rolling section 12, a concentrated deformation section 13, an equalizing section 14, a rounding section 15 and a pipe polishing section 16 are sequentially formed on the roller body 1 from right to left, and the contact biting section 11, the rotary rolling section 12, the concentrated deformation section 13, the equalizing section 14, the rounding section 15 and the pipe polishing section 16 are all conical surfaces.
Furthermore, the included angle (angle a in the figure) between the bus of the contact biting section 11 and the rotating shaft g of the roller body 1 ranges from 7 to 9 °, the included angle (angle b in the figure) between the bus of the rotary rolling section 12 and the rotating shaft g of the roller body 1 ranges from 6 to 7 °, the included angle (angle c in the figure) between the bus of the collecting section 13 and the rotating shaft g of the roller body 1 ranges from 12 to 18 °, the included angle (angle d in the figure) between the bus of the leveling section 14 and the rotating shaft g of the roller body 1 ranges from 0 to 1 ° 0 ', the included angle (angle e in the figure) between the bus of the rounding section 15 and the rotating shaft g of the roller body 1 ranges from 1 ° 12 ' to 1 ° 50 ', and the included angle (angle f in the figure) between the bus of the polishing pipe section 16 and the rotating shaft g of the roller body 1 ranges from 5 to 6 °.
Further, the included angle between the generatrix of the contact biting section 11 and the rotating shaft g of the roller body 1 is 7 °, the included angle between the generatrix of the rotary rolling section 12 and the rotating shaft g of the roller body 1 is 6 °, the included angle between the generatrix of the collecting section 13 and the rotating shaft g of the roller body 1 is 14 °, the included angle between the generatrix of the leveling section 14 and the rotating shaft g of the roller body 1 is 0 ° 50 ', the included angle between the generatrix of the rounding section 15 and the rotating shaft g of the roller body 1 is 1 ° 12', and the included angle between the generatrix of the pipe polishing section 16 and the rotating shaft g of the roller body 1 is 6 °.
Further, the roller length ratio of the contact biting section 11, the rotary rolling section 12, the gathering and transforming section 13, the leveling section 14, the rounding section 15 and the pipe polishing section 16 in the direction of the rotating shaft g is as follows: 4.2:4.0:6.0:1.0-1.7:6.96:2.0.
The three-high mill using the six-section rollers for rolling the nonferrous metal further comprises three roller shafts 2, bearing seats 3 and flange plates 4, the number of the roller bodies 1 is three, the three roller bodies 1 are uniformly distributed on the circumference by taking a rolling central line as a center, the included angle (the angle gamma in the figure) between the rotating shaft g of each roller body 1 and a first plane h where the rolling central line is located is 4 degrees 1' 12 degrees, the roller shafts 2 penetrate through the roller bodies 1 and are fixedly connected with the roller bodies 1, the roller shafts 2 are connected with a main transmission universal shaft through the flange plates 4 for power input, the bearing seats 3 are fixedly connected with a main machine adjusting mechanism, the first plane h is vertical to a second plane i, the pull-in angle beta is the included angle between the rotating shaft g and the second plane i, and the adjustment range of the pull-in angle beta is 6 degrees to 10 degrees.
The main machine adjusting mechanism can drive the bearing seat 3 to adjust the angle, and then drive the drawing-in angle beta to change between 6 degrees and 10 degrees so as to adapt to the rolling of pierced billets with different specifications.
Further, the pull-in angle β is 8 °.
The working principle is as follows:
the non-ferrous metal (titanium alloy) pierced billet is firstly contacted with the contact biting sections 11 of the three roller bodies 1, then the non-ferrous metal pierced billet is driven by the contact biting sections 11 to rotate and advance towards the direction close to the pipe throwing section 16, and the non-ferrous metal pierced billet rotates in sequence to pass through the rolling section 12, the deformation collecting section 13, the leveling section 14 and the rounding section 15 and then is thrown out of the three-roller mill from the pipe throwing section 16. The rotary rolling section 12, the deformation collecting section 13, the leveling section 14 and the rounding section 15 respectively perform rolling, micro-concentration changing, leveling and rounding operations on the nonferrous metal pierced billet. Through the concentrated deformation section, the equalizing section and the rounding section of the roller body, the three-roller mill realizes the stable rolling of the nonferrous metal through the combination of micro concentrated deformation and equalizing process in the rolling process. Through a large amount of test rolling, the roll shape design of six sections of rollers is suitable for the plastic property of non-ferrous metals in the process of rolling non-ferrous metals, the designed deformation distribution of six sections is more reasonable than that of the roll shape design section of a three-roll mill for rolling ferrous metals, more reasonable outlet cones are designed, the interval design of the included angle of the even section and the included angle of the pipe throwing section is relatively increased, the design of the included angle of the biting cone is increased, and the method is more suitable for the hot-rolled metal calendering forming property of non-ferrous metals. The distribution ratio of each section is designed as follows: 4.2:4.0:6.0:1.0:6.96:2.0.
Wherein the nonferrous metal can be titanium alloy TC4 and Ti 80.
The present invention has been described above by way of example, but the present invention is not limited to the above-described specific embodiments, and any modification or variation made based on the present invention is within the scope of the present invention as claimed.
Claims (6)
1. A six-segment roll shape for rolling non-ferrous metals, which is characterized by comprising: the roller comprises a roller body (1), wherein a contact biting section (11), a rotary rolling section (12), a collection deformation section (13), a uniform section (14), a rounding section (15) and a pipe polishing section (16) are sequentially formed on the roller body (1) from right to left, and the contact biting section (11), the rotary rolling section (12), the collection deformation section (13), the uniform section (14), the rounding section (15) and the pipe polishing section (16) are all conical surfaces.
2. The six-segment roll shape for rolling non-ferrous metals according to claim 1, characterized in that: the included angle range of the bus of the contact biting section (11) and the rotating shaft (g) of the roller body (1) is 7-9 degrees, the included angle range of the bus of the rotary rolling section (12) and the rotating shaft (g) of the roller body (1) is 6-7 degrees, the included angle range of the bus of the collecting section (13) and the rotating shaft (g) of the roller body (1) is 12-18 degrees, the included angle range of the bus of the leveling section (14) and the rotating shaft (g) of the roller body (1) is 0-1-0 degrees, the included angle range of the bus of the rounding section (15) and the rotating shaft (g) of the roller body (1) is 1-12' to 1-50 degrees, and the included angle range of the bus of the pipe throwing section (16) and the rotating shaft (g) of the roller body (1) is 5-6 degrees.
3. The six-segment roll shape for rolling nonferrous metal according to claim 2, wherein: the included angle of the bus of the contact biting section (11) and the rotating shaft (g) of the roller body (1) is 7 degrees, the included angle of the bus of the rotary rolling section (12) and the rotating shaft (g) of the roller body (1) is 6 degrees, the included angle of the bus of the collecting section (13) and the rotating shaft (g) of the roller body (1) is 14 degrees, the included angle of the bus of the leveling section (14) and the rotating shaft (g) of the roller body (1) is 0 degree 50 degrees, the included angle of the bus of the rounding section (15) and the rotating shaft (g) of the roller body (1) is 1 degree 12 degrees, and the included angle of the bus of the pipe throwing section (16) and the rotating shaft (g) of the roller body (1) is 6 degrees.
4. The six-segment roll shape for rolling nonferrous metal according to claim 2, wherein: the length ratio of the contact gripping section (11), the rotary rolling section (12), the collection and transformation section (13), the leveling section (14), the rounding section (15) and the pipe throwing section (16) in the roller body along the direction of the rotating shaft (g) is as follows: 4.2:4.0:6.0:1.0-1.7:6.96:2.0.
5. A three roll mill using six segments of rolls for nonferrous metal rolling according to any one of claims 1 to 4, characterized in that: the roller is characterized by further comprising three roller shafts (2), bearing seats (3) and flange plates (4), the number of the roller bodies (1) is three, the three roller bodies (1) are uniformly distributed on the circumference by taking a rolling central line as an axis, the included angle between a rotating shaft (g) of each roller body (1) and a first plane (h) where the rolling central line is located is 4 degrees 1 '12', the roll shaft (2) penetrates through the roll body (1) and is fixedly connected with the roll body (1), the roll shaft (2) is connected with the main transmission universal shaft through a flange plate (4) to carry out power input, the bearing seat (3) is fixedly connected with the main machine adjusting mechanism, the rolling center line is positioned on a second plane (i), the first plane (h) is perpendicular to the second plane (i), the pull-in angle (beta) is an included angle between the rotating shaft (g) and the second plane (i), and the adjustment range of the pull-in angle (beta) is 6-10 degrees.
6. The three high mill using six segments of rolls for rolling nonferrous metals according to claim 5, wherein: the pull-in angle (β) is 8 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210229723.3A CN114425564B (en) | 2022-03-09 | 2022-03-09 | Six-section roll shape and three-roller mill for nonferrous metal rolling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210229723.3A CN114425564B (en) | 2022-03-09 | 2022-03-09 | Six-section roll shape and three-roller mill for nonferrous metal rolling |
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| Publication Number | Publication Date |
|---|---|
| CN114425564A true CN114425564A (en) | 2022-05-03 |
| CN114425564B CN114425564B (en) | 2024-01-12 |
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| CN202210229723.3A Active CN114425564B (en) | 2022-03-09 | 2022-03-09 | Six-section roll shape and three-roller mill for nonferrous metal rolling |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685187A (en) * | 1995-03-24 | 1997-11-11 | Kocks Technik Gmbh & Co. | Arrangement for inclined rolling of tube- and bar-shaped rolling articles |
| EP0885667A2 (en) * | 1997-06-09 | 1998-12-23 | MANNESMANN Aktiengesellschaft | Skew-rolling mill for stretching a seamless hollow body heated to a forming temperature |
| CN2690065Y (en) * | 2004-04-09 | 2005-04-06 | 王秀和 | Seamless steel pipe combined pipe mill group |
| CN101020190A (en) * | 2007-03-21 | 2007-08-22 | 中冶东方工程技术有限公司 | Hot rolling process of seamless steel pipe |
| CN102814330A (en) * | 2012-09-06 | 2012-12-12 | 济南重工股份有限公司 | Process and device for producing hot-rolled seamless steel pipe |
| CN105750332A (en) * | 2016-05-09 | 2016-07-13 | 鑫鹏源智能装备集团有限公司 | Eight-section type pipe rolling roll shape and manufacturing method thereof |
-
2022
- 2022-03-09 CN CN202210229723.3A patent/CN114425564B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5685187A (en) * | 1995-03-24 | 1997-11-11 | Kocks Technik Gmbh & Co. | Arrangement for inclined rolling of tube- and bar-shaped rolling articles |
| EP0885667A2 (en) * | 1997-06-09 | 1998-12-23 | MANNESMANN Aktiengesellschaft | Skew-rolling mill for stretching a seamless hollow body heated to a forming temperature |
| CN2690065Y (en) * | 2004-04-09 | 2005-04-06 | 王秀和 | Seamless steel pipe combined pipe mill group |
| CN101020190A (en) * | 2007-03-21 | 2007-08-22 | 中冶东方工程技术有限公司 | Hot rolling process of seamless steel pipe |
| CN102814330A (en) * | 2012-09-06 | 2012-12-12 | 济南重工股份有限公司 | Process and device for producing hot-rolled seamless steel pipe |
| CN105750332A (en) * | 2016-05-09 | 2016-07-13 | 鑫鹏源智能装备集团有限公司 | Eight-section type pipe rolling roll shape and manufacturing method thereof |
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| Publication number | Publication date |
|---|---|
| CN114425564B (en) | 2024-01-12 |
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