CN108246938B - Continuous translation type rolling mill and rolling method thereof - Google Patents
Continuous translation type rolling mill and rolling method thereof Download PDFInfo
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- CN108246938B CN108246938B CN201810032196.0A CN201810032196A CN108246938B CN 108246938 B CN108246938 B CN 108246938B CN 201810032196 A CN201810032196 A CN 201810032196A CN 108246938 B CN108246938 B CN 108246938B
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- 238000005096 rolling process Methods 0.000 title claims abstract description 122
- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000007599 discharging Methods 0.000 claims description 13
- 230000033001 locomotion Effects 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 3
- 238000004321 preservation Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 4
- 238000010008 shearing Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 230000002349 favourable effect Effects 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000005242 forging Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000010080 roll forging Methods 0.000 description 2
- 238000005097 cold rolling Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/14—Making articles shaped as bodies of revolution balls, rollers, cone rollers, or like bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/22—Making articles shaped as bodies of revolution characterised by use of rolls having circumferentially varying profile ; Die-rolling
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Abstract
The invention relates to a continuous translation type rolling mill and a rolling method thereof, wherein the continuous translation type rolling mill comprises an upper roller and a lower roller which are uniformly and horizontally arranged, a first rolling groove is arranged on the lower surface of the upper roller, a second rolling groove is arranged on the upper surface of the lower roller, and the first rolling groove and the second rolling groove are both in a wave shape; the upper roller is horizontally reciprocable relative to the lower roller, and in an initial position, the first and second grooves are engageable with each other. The upper roller and the lower roller are arranged opposite to the groove, the difference between the two rollers is a wave tooth, the wave crest and the wave trough are opposite after the assembly, the upper roller horizontally reciprocates at a certain speed, and the tangential shearing action is generated on the blank while the compression stress is applied to the blank between the upper roller and the lower roller. Under the effect of compressive stress and shear stress, the deformation body more easily enters a plastic deformation state, can reduce deformation load, is favorable for the plastic deformation process of materials, can eliminate some micro-defects in the blank simultaneously, can meet the continuous processing of workpieces, and has high processing precision.
Description
Technical Field
The invention belongs to the technical field of metal material cold rolling dies, and particularly relates to a continuous translation type rolling mill and a rolling method thereof.
Background
The shaft part is one of typical revolving body parts commonly used in the mechanical industry production, has wide application in numerous fields such as machine tools, automobiles, aerospace and the like, and is mostly a core part of equipment. The machine plays a role in supporting other parts and transmitting torque. If the shaft parts fail, the motion precision of the shaft parts is difficult to guarantee, the service life of the shaft parts is shortened, and even unexpected disastrous accidents can be caused. Therefore, it is important to improve the forging penetration of the shaft-like part during the roll forming and the continuity of the blank making process.
The rolling mill is a main device for realizing the metal rolling process, and the rolling mill in the prior art mainly has two types. One is that the position of the blank is kept still, and the rolling process is carried out by a rolling mill with high pressure linear motion, and the precision of the blank by the rolling mill cannot be strictly controlled, so that the local large deformation and even the crushing damage of the blank are easily caused; the other type is that the rolling mill is not moved, and the workpiece is pulled to do linear motion so as to carry out the rolling process, the rolling mill has low efficiency and cannot meet the requirement of rolling a blank with a thick thickness, and the workpiece can be shaped and processed by rolling for multiple times. For example, the chinese patent CN102921733A discloses a mold device with two staggered conical wave rollers, which can hold the workpiece at the original position and rapidly form the workpiece by the rotation of the upper and lower rollers. However, as the rolling process proceeds, the rolling force fluctuates due to the change of the friction force between the upper and lower rolls, and the accuracy of the workpiece cannot be satisfied.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a continuous translational rolling mill and a rolling method thereof, which can carry out continuous translational rolling and have high processing precision.
In order to achieve the purpose, the rolling mill adopts the following technical scheme:
the device comprises an upper roller and a lower roller which are horizontally arranged, wherein a first rolling groove is formed in the lower surface of the upper roller, a second rolling groove is formed in the upper surface of the lower roller, and the first rolling groove and the second rolling groove are both in a wave shape; the upper roller is horizontally reciprocable relative to the lower roller, and in an initial position, the first and second grooves are engageable with each other.
Further, the wave form curve equation of the first rolling groove and the second rolling groove is y ═ Asin (ω t), wherein: a is the waveform amplitude, omega is related to the period of the sin function, and t is the angular arc, and the value range of t is 0-2 pi.
Further, the value range of A is 0.8-1.2 times of the diameter of the blank to be processed, and the value range of omega is 0.95-2 times of the diameter of the blank to be processed.
Further, the discharge end of the lower roller is provided with a platform which is positioned on the same horizontal plane with the wave trough on the second rolling groove.
Furthermore, a baffle plate is arranged at the rear side of the discharge end of the lower roller.
The invention relates to a continuous translational rolling method, which is characterized in that: the method comprises the following steps:
the method comprises the following steps: firstly, horizontally and fixedly mounting a lower roller, mounting an upper roller capable of horizontally reciprocating above a lower roller, arranging a first rolling groove on the lower surface of the upper roller, arranging a second rolling groove on the upper surface of the lower roller, wherein the first rolling groove and the second rolling groove are both in a waveform shape, and ensuring that the wave crest of the first rolling groove is over against the wave trough of the second rolling groove when the lower roller is at an initial position; adjusting the distance between the upper roller and the lower roller;
step two: placing the blank on a trough at the feeding end of the lower roller after heat preservation treatment, and adjusting the position of the upper roller until the blank is contacted; the upper roller moves horizontally and drives the blank to move towards the discharge end of the lower roller until the blank reaches the discharge end, and the first period of rolling is finished; the blank is driven to return to the feeding end of the lower roller through the reverse horizontal movement of the upper roller, and the blank is repeatedly circulated for a plurality of times, so that the blank is discharged from the discharging end of the lower roller after the expected size and precision requirements are met.
Furthermore, the speed of the upper roller is 0.24-0.5 m/s.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a translational type rolling die device according to a rolling forming principle, wherein an upper roller and a lower roller which are opposite to a rolling groove are arranged, the rolling groove is in a waveform shape, the upper roller and the lower roller can be meshed, namely, the upper roller and the lower roller have a wave tooth difference, after assembly, wave crests and wave troughs are opposite, the upper roller horizontally reciprocates at a certain speed, and the upper roller and the lower roller can exert pressure stress on a blank and simultaneously generate a tangential shearing action on the blank. Under the action of pressure stress and shear stress, the deformation body can more easily enter a plastic deformation state, and simultaneously can reduce deformation load, thereby being beneficial to the plastic deformation process of materials and simultaneously eliminating some micro defects in the blank. The device provided by the invention is reasonable in overall design and simple to operate, is a rolling device for improving blank-making cyclicity and forging penetration of the shaft type forge piece, can meet continuous processing of a workpiece, and is high in processing precision.
Furthermore, the discharging device is convenient to discharge materials by arranging the platform.
In the method of the invention, if the blank only needs one translation rolling process, the last tooth of the lower roller can be directly carried out. If repeated rolling is needed, continuous processing is controlled by a transmission device. In the processing process, the lower roller is fixed, so that discharging is facilitated; after the processing of the invention, the internal deformation of the blank after further rounding is controllable and evenly distributed, the forming method is simple, the operation is simple and convenient, the principle is scientific, the safety is good, the production automation level is high, the processing precision is high, the continuous operation can be realized, and the time and the labor are saved. In the rolling forming process, the blank only carries out one-time rolling procedure on each rolling groove, the rolling grooves are all arranged by a bar rolling method according to the principle of equal second volume flow, the rolling grooves are mutually and tightly arranged, the temperature drop of the blank is small, and the friction force between an upper roller and a lower roller is uniform; compared with the traditional rolling method, the yield can be improved by 0.5 to 1.0 percent, and the productivity can be improved by 10 to 15 percent.
Furthermore, the horizontal moving speed of the upper roller is 0.24-0.5 m/s, so that the continuity and the reciprocatability of the bar rolling forming process are ensured.
Drawings
FIG. 1 is a schematic view of an initial state of operation of a translating wave roll;
FIG. 2 is a schematic view showing the state of the operation of the translation type corrugated roll;
FIG. 3 is a schematic view showing a structure of an operation termination state of the translation type wave roller;
figure 4 is a side view of a translating wave roll configuration.
Wherein: 1. upper roll; 2. a blank; 3. a lower roll; 4. a baffle plate; 5. a first groove; 6. a second groove; 7. and a discharge end.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, 2, 3 and 4, the present invention comprises an upper roller 1 and a lower roller 3 both horizontally arranged, a first groove 5 is arranged on the lower surface of the upper roller 1, a second groove 6 is arranged on the upper surface of the lower roller 3, and both the first groove 5 and the second groove 6 are in a wave shape; the upper roll 1 is capable of horizontal reciprocation relative to the lower roll 3 and in the initial position the first and second grooves 5, 6 are capable of intermeshing.
The wave form curve equation of the first rolling groove 5 and the second rolling groove 6 is y ═ Asin (ω pi t), where: a is the waveform amplitude, omega is related to the period of the sin function, and t is the angular arc, and the value range of t is 0-2 pi.
In order to facilitate discharging, the curved surface profile is cut off along the horizontal direction by the half wave shape at the right end of the lower roller 3, and a platform is formed at the discharging end 7 of the lower roller 3 and is positioned on the same horizontal plane with the wave trough on the second rolling groove 6. The rear side of the discharge end 7 of the lower roller 3 is provided with a baffle 4 which is used as a protection device, and the blank 2 after being rolled is discharged along the vertical direction.
The invention relates to a continuous translational rolling method, which comprises the following steps:
the method comprises the following steps: firstly, a lower roller 3 is horizontally and fixedly installed, an upper roller 1 capable of horizontally reciprocating is installed above a lower roller 3, a first rolling groove 5 is formed in the lower surface of the upper roller 1, a second rolling groove 6 is formed in the upper surface of the lower roller 3, the first rolling groove 5 and the second rolling groove 6 are both in a waveform shape, and when the lower roller is at an initial position, the wave crest of the first rolling groove 5 is ensured to be over against the wave trough of the second rolling groove 6; adjusting the distance between the upper roll 1 and the lower roll 3;
step two: placing the blank 2 on a trough at the feeding end of the lower roller 3 after heat preservation treatment, horizontally moving through the upper roller 1, driving the blank 2 to move towards the discharging end 7 of the lower roller 3 until the blank reaches the discharging end 7, and finishing the first period of rolling; the upper roller 1 moves horizontally in the reverse direction to drive the blank 2 to return to the feeding end of the lower roller 3, and the reciprocating circulation is performed for a plurality of times, so that the blank 2 is discharged from the discharging end 7 of the lower roller 3 after the expected size and precision requirements are met. According to the continuity and the reciprocatability of the bar rolling forming process, the horizontal moving speed of the upper roller 1 is 0.24-0.5 m/s.
The invention provides a waveform translation type rolling mill device according to a rolling forming principle, solves the contradiction between the continuous type processing and the forging penetration of shaft workpieces in the prior art, and can perform continuous blank making on the shaft parts.
The device comprises an upper plane roller and a lower plane roller, wherein a rolling groove is engraved on each roller surface to shape a rolled piece, the profiles of the lower surface of the upper roller 1 and the upper surface of the lower roller 3 are both wave curves, specifically, the distance between the profile curve and the bottom of the roller is H, the roller length is T, and the profile curve equation of the upper roller surface and the lower roller surface is a sine curve y which is Asin (omega T) (wherein A is a wave amplitude, omega is related to the period of a sin function, the value range of A is 0.8-1.2 times of the diameter of a blank, the value range of omega is 0.95-2 times of the diameter of the blank, T is an angle radian, the value range of T is 0-2 pi), the upper roller surface and the lower roller surface are different by one wave tooth, and the upper roller surface and the lower roller surface are in wave meshing after being assembled. The up-down translational type rollers are combined in a staggered mode, the upper position and the lower position are fixedly assembled, the axial line distance can be adjusted, the roller gap can be changed, the processing is suitable for shafts with different sizes, and the wave crest position of the wave-shaped teeth of the upper roller 1 corresponds to the wave trough position of the wave-shaped teeth of the lower roller 3 in the working process. When the shaft blank is rolled and formed, in order to facilitate discharging, the lower roller 3 is fixed, the upper roller 1 horizontally reciprocates at a certain speed, and tangential shearing action is generated on the blank while pressure stress is applied to the blank among the corrugated rollers. If the workpiece requires only one translation rolling process, it can be directly proceeded to the last tooth of the waveform. If repeated rolling is needed, continuous processing is controlled by a transmission device. Under the action of pressure stress and shear stress, the deformation body can more easily enter a plastic deformation state, and simultaneously can reduce deformation load, thereby being beneficial to the plastic deformation process of materials and simultaneously eliminating some micro defects in the blank. After the die is used for processing, the internal deformation of the blank can be controlled and is uniformly distributed after the blank is further rounded. The device has the advantages of reasonable overall design, simple forming method, simple and convenient operation, scientific principle, good safety, high production automation level, continuous operation, time saving and labor saving.
Example one
The embodiment is a processing device for blanking of shaft forgings. The embodiment comprises an upper roller 1 and a lower roller 3 which are shaped like sine curve translation type corrugated rollers; the upper roller 1 and the lower roller 3 have the same structure and are assembled in opposite directions, namely, the wave crest position of the upper roller 1 corresponds to the wave trough position of the lower roller 3, so that the engagement during the translation of the upper roller and the lower roller is met. The axial distance is adjusted to change the roll gap so as to adapt to the processing of shafts with different sizes. The workpiece can be subjected to a continuous rolling process through the transmission device.
The distance between the profile curve of the upper roller and the bottom of the lower roller is 120mm, the width of the roller is 320mm, the length of the roller is 800mm, and the equation of the profile curve of the upper roller and the profile curve of the lower roller is that the sine curve y is 40sin (33t) (unit mm). After the installation, the lower roller 3 is fixed, the upper roller 1 is parallel to the lower roller 3, and the initial distance of the roller surface is 44 mm. The upper roll 1 is moved horizontally at a speed of 0.5 m/s. Heating a 40# steel blank with the diameter of 34mm and the length of 280mm to 840 ℃, preserving heat for half an hour, then placing the steel blank into the wave trough position of the lower roller 3, adjusting the position of the upper roller 1 until the steel blank is contacted, and starting the rolling process along with the translation of the upper roller 1. The blank 2 is driven by the upper roller 1 to rotate along the surface of the roller, after the blank is subjected to roll forging processing from left to right for one period by the upper roller and the lower roller, the blank 2 leaves the rolling mill on the right side of the lower roller under the driving of the upper roller, and discharging is completed.
The traditional block rolling mode needs frequent steel biting, steel throwing and rolling speed changing, so that the quality of the head and the tail of steel is difficult to ensure, the operation rate of a rolling mill is low, and the control on the precision of a blank is difficult. In the rolling forming process, the blank only carries out one rolling procedure on each rolling groove, and the bar rolling method follows the principle of equal volume flow per second among all the rolling grooves. The rolling grooves are mutually and tightly arranged, and the temperature drop of the blank is small. Compared with the traditional rolling method, the yield can be improved by 0.5 to 1.0 percent, and the productivity can be improved by 10 to 15 percent. For the workpiece processed and formed by the translational corrugated roller, a proper rounding process needs to be carried out on the workpiece according to specific processing requirements.
Example two
The embodiment is a processing device for blanking of shaft forgings. The embodiment comprises an upper roller 1 and a lower roller 3 which are shaped like sine curve translation type corrugated rollers; the upper roller 1 and the lower roller 3 have the same structure and are assembled in opposite directions, namely, the wave crest position of the upper roller 1 corresponds to the wave trough position of the lower roller 3, so that the engagement during the translation of the upper roller and the lower roller is met. The axial distance is adjusted to change the roll gap so as to adapt to the processing of shafts with different sizes. The workpiece can be subjected to a continuous rolling process through the transmission device.
The distance between the profile curve of the upper roller and the profile curve of the lower roller and the bottom of the roller is 80mm, the width of the roller is 350mm, the length of the roller is 980mm, and the equation of the profile curve of the upper roller and the profile curve of the lower roller is that the sine curve y is 40sin (50t) (unit mm). After the installation is finished, the lower roller 3 is fixed, the upper roller 1 is parallel to the lower roller 3, and the initial distance of the roller surface is 55 mm. The upper and lower rolls were horizontally moved at a speed of 0.24 m/s. Heating a copper alloy blank with the diameter of 45mm and the length of 300mm to 600 ℃, preserving heat for 55 minutes, then placing the copper alloy blank into the wave trough position of the lower roller 3, and after the blank 2 is contacted with the upper roller 1, starting the rolling process along with the translation of the upper roller 1. The blank 2 is driven by the upper roller 1 to rotate along the surface of the roller, and after the blank is subjected to roll forging processing from left to right for a period by the upper roller and the lower roller, the motor is reversed by changing the matching of the gear and the motor, so that the continuous rolling process of the workpiece is realized. After the requirement of the expected size and precision is met, the blank leaves the rolling mill on the right side of the lower roller under the driving of the upper roller, and discharging is completed.
The traditional block rolling mode needs frequent steel biting, steel throwing and rolling speed changing, so that the quality of the head and the tail of steel is difficult to ensure, the operation rate of a rolling mill is low, and the control on the precision of a blank is difficult. In the rolling forming process, the blank only carries out one rolling procedure on each rolling groove, and the bar rolling method follows the principle of equal volume flow per second among all the rolling grooves. The rolling grooves are mutually and tightly arranged, and the temperature drop of the blank is small. Compared with the traditional rolling method, the yield can be improved by 0.5 to 1.0 percent, and the productivity can be improved by 10 to 15 percent. For the workpiece processed and formed by the translational corrugated roller, a proper rounding process needs to be carried out on the workpiece according to specific processing requirements.
Claims (4)
1. A continuous translational rolling method is characterized in that: the method comprises the following steps:
the method comprises the following steps: at first with lower roll (3) horizontal fixed mounting, can carry out horizontal reciprocating motion's last roller (1) in the top installation of lower roll (3), the lower surface of going up roller (1) sets up first mangle (5), and the upper surface of lower roll (3) sets up second mangle (6), and first mangle (5) and second mangle (6) are the wave form, and the wave form curve equation of first mangle (5) and second mangle (6) is y Asin (ω pi t), wherein: a is a waveform amplitude, omega is related to the period of the sin function, t is angular arc, the value range of t is 0-2 pi, and when the rolling mill is at an initial position, the wave crest of the first rolling mill (5) is ensured to be over against the wave trough of the second rolling mill (6); adjusting the distance between the roll surfaces of the upper roll (1) and the lower roll (3);
step two: placing the blank (2) on a wave trough at the feed end of the lower roller (3) after heat preservation treatment, and adjusting the position of the upper roller (1) until the blank (2) is contacted; the upper roll (1) horizontally moves and drives the blank (2) to move towards the discharge end (7) of the lower roll (3) until the blank reaches the discharge end (7), the first period of rolling is completed, a half wave form at the right end of the lower roll (3) cuts the curved surface profile along the horizontal direction, a platform is formed at the discharge end (7) of the lower roll (3), and the platform and the wave trough on the second rolling groove (6) are positioned on the same horizontal plane; the upper roller (1) moves horizontally in the reverse direction and then drives the blank (2) to return to the feeding end of the lower roller (3), the reciprocating circulation is carried out for a plurality of times, and after the expected size and precision requirements are met, the blank (2) is discharged from the discharging end (7) of the lower roller (3).
2. A continuous translational rolling method as set forth in claim 1, characterized in that: the speed of the upper roller (1) is 0.24-0.5 m/s.
3. A continuous translation rolling mill for use in the method of claim 1, wherein: the device comprises an upper roller (1) and a lower roller (3) which are horizontally arranged, wherein a first rolling groove (5) is formed in the lower surface of the upper roller (1), a second rolling groove (6) is formed in the upper surface of the lower roller (3), and the first rolling groove (5) and the second rolling groove (6) are both in a wave shape; the upper roller (1) can horizontally reciprocate relative to the lower roller (3), and the first rolling groove (5) and the second rolling groove (6) can be meshed with each other in the initial position;
the wave form curve equation of the first rolling groove (5) and the second rolling groove (6) is that y is Asin (ω t), wherein: a is a waveform amplitude, omega is related to the period of the sin function, t is angular arc, and the value range of t is 0-2 pi;
a discharging end (7) of the lower roller (3) is provided with a platform which is positioned on the same horizontal plane with the wave trough on the second rolling groove (6);
a baffle (4) is arranged at the rear side of the discharge end (7) of the lower roller (3).
4. A continuous translation rolling mill according to claim 3, characterized in that: the value range of A is 0.8-1.2 times of the diameter of the blank (2) to be processed, and the value range of omega is 0.95-2 times of the diameter of the blank (2) to be processed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810032196.0A CN108246938B (en) | 2018-01-12 | 2018-01-12 | Continuous translation type rolling mill and rolling method thereof |
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| CN201810032196.0A CN108246938B (en) | 2018-01-12 | 2018-01-12 | Continuous translation type rolling mill and rolling method thereof |
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| CN108246938B true CN108246938B (en) | 2020-09-08 |
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| CN112732700B (en) * | 2021-01-25 | 2023-03-14 | 中冶赛迪信息技术(重庆)有限公司 | Steel rolling production data slicing method, system, medium and electronic terminal |
| CN115592056B (en) * | 2022-12-15 | 2023-04-07 | 太原理工大学 | Large-thickness-ratio interlayer shell ring rolling compounding method based on local high-temperature strong pressure |
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| CN1100014A (en) * | 1994-06-10 | 1995-03-15 | 胶州市橡胶机械厂 | Plate wedge cross rolling mill |
| CN102921733A (en) * | 2012-10-18 | 2013-02-13 | 西北工业大学 | Wavelike roll of rolling device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1017330B (en) * | 1989-05-10 | 1992-07-08 | 青岛锻压机械厂 | Screw press |
| JPH11104779A (en) * | 1997-10-06 | 1999-04-20 | Kobe Steel Ltd | Manufacture of tube with inner groove |
| JP2002059227A (en) * | 2000-08-16 | 2002-02-26 | Enomoto Co Ltd | Press die set and direct drive mechanical element |
| CN100457318C (en) * | 2006-03-03 | 2009-02-04 | 北京科技大学 | Plate type wedge lateral rolling forming method for eccentric step shalf |
| CN101225692B (en) * | 2007-01-15 | 2011-02-02 | 梁志方 | Metal plate processing mould having emboss |
| CN101249508A (en) * | 2008-04-02 | 2008-08-27 | 中兴能源装备股份有限公司 | Method for producing seamless steel pipe with reversible reciprocating periodic time hot rolling technique |
| CN102688889B (en) * | 2011-03-23 | 2014-06-04 | 宝山钢铁股份有限公司 | Intermediate roll form of cold continuous mill |
| CN106216442A (en) * | 2016-08-26 | 2016-12-14 | 青岛裕安石化装备有限公司 | Section bar or the leveling method of band steel and device thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1100014A (en) * | 1994-06-10 | 1995-03-15 | 胶州市橡胶机械厂 | Plate wedge cross rolling mill |
| CN102921733A (en) * | 2012-10-18 | 2013-02-13 | 西北工业大学 | Wavelike roll of rolling device |
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