CN102861766B - Square tube rolling device, square tube sizing mill with same and production method of square tube - Google Patents
Square tube rolling device, square tube sizing mill with same and production method of square tube Download PDFInfo
- Publication number
- CN102861766B CN102861766B CN201210351598.XA CN201210351598A CN102861766B CN 102861766 B CN102861766 B CN 102861766B CN 201210351598 A CN201210351598 A CN 201210351598A CN 102861766 B CN102861766 B CN 102861766B
- Authority
- CN
- China
- Prior art keywords
- roll
- square tube
- square
- surely
- driving shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention provides a square tube rolling device, a square tube sizing mill with the same and a production method of a square tube. The square tube rolling device comprises a rack and three groups of roll parts, wherein each group of roll parts is provided with an active moving roll; all the rolls are arranged on the rack; three rolls in the three groups of roll parts include a first roll, a second roll and a third roll; axes of all the rolls are intersected in the same plane; and roll grooves of all the rolls are combined to form a square hole. Three rolls of the square tube rolling device are all drive rolls, so that all rolls have the deformation capacity greater than that of the traditional one-roll drive or two-roll drive, and the rolling deformation of a thick wall steel tube and an ultra-thick wall steel tube can be satisfied; in the hot pressing process, four side walls of the square hole are in contact with a hot circular tube after sizing, wherein the square hole is formed by combining the roll grooves of all the rolls, and the rolling force is further transmitted to all parts of the circular tube, and thus the square tube with precise size and better mechanical properties is obtained.
Description
Technical field
The present invention relates to field of metallurgy, in particular to a kind of square tube roll device, containing the surely square machine of square tube of this device and the production method of square tube.
Background technology
Square tube is the one address of square pipe.As a kind of steel of economical and efficient, be mainly used in engineering construction field, comprise the fields such as steel house, main building, boiler steel frame, urban construction and machine-building.At present, a collection of steel house pilot and demonstration projects have been built on the ground such as Beijing, Tianjin, Shanghai, be the clean steel system combined by side's (square) tubing string and H profile steel cross section, wherein side's (square) effective amount accounts for more than 50% of building industry section bar total amount.
At present, square tube production technology mainly contain welding, coldly to push away, cold-drawn or cold rolling.Welding square tube adopts the clod wash straight forming method of moving in bending radius, flexural center of determine, and utilize the collection skin of high frequency electric, close on, attract, the principle of mutual inductance by force, Plate Welding one-tenth is had a weld seam and angle is the wedge angle square tube of 90 °.Adopt the physical dimension of the square tube commissure of welding procedure production, mechanical property, chemical composition and metallographic structure etc. to be difficult to parent completely the same, its mechanical performance comparatively fertile material is poor, is not suitable for construction steel house.
Coldly to push away, cold-drawn or cold rolling square tube be with hot rolling or welding hollow billet for raw material, through the square tube that pickling is produced except the laggard row drawing of descale or rolling cold deformation.For the plastic deformation of metal, having a specific temperature recrystallization temperature, being just called thermal processing distortion higher than carrying out deformation processing at this temperature, is exactly cold deformation lower than the processing of this temperature.As long as there is plastic deformation, work hardening phenomenon will be produced.Coldly to push away, mode that cold-drawn or cold rolling square tube are exactly a kind of cold deformation, in cold deformation process, there is not recrystallization process, serious work hardening phenomenon can not be alleviated, and work hardening phenomenon makes metal resistance of deformation in plastic history increase gradually, even lose the ability continuing distortion and cause cracking; After cold working, work of deformation fraction is retained in metal inside, forms residual stress.The existence of residual stress makes the FREE TORSION rigidity in its cross section lower, and easily occur when being subject to curved reversing, easily occur bending torsional buckling during pressurized, torsional property is poor; And cold deformation mode only can produce the square tube of little wall thickness, the corner connected at plate does not thicken again, and the ability of bearing the load of locality is weak; Meanwhile, continuous cold is out of shape the flow harden caused makes the intensity of square tube and hardness rising, tough index of moulding decline, and causes the impact property of square tube to worsen.As can be seen here, the existing square tube adopting the modes such as welding, cold deformation to produce, the problems such as mechanical performance uniformity, torsional property are poor owing to not solving simultaneously, the ability of the load of bearing locality is weak and impact property is poor, fail to be used widely at building field, especially can not be applicable to skyscraper field.
Hot rolling square tube is a kind of thermal processing distortion process to steel pipe, because hot-working is higher than plastic deformation more than recrystallization temperature, so the softening process that the hardening process caused because of plastic deformation and recovery and recrystallization cause almost exists and cancels out each other simultaneously, and hot-working can to make in hollow billet some defect as pore and loose seam, eliminate part segregation, make grain refinement, improve the morphology and distribution etc. of field trash or brittlement phase, its result can improve the compactness of hot rolling square tube, plasticity and toughness.Simultaneously because hot rolling square tube does not exist the processes such as pickling, the pipe after tube rolling is directly carried out hot rolling sizing, and its production efficiency is apparently higher than the production efficiency of cold deformation square tube.
The present invention improves the current three-roll sizing mill for pipe sizing, achieves the object utilizing the seamless hot rolling technique of three-roll sizing mill to make hot rolling square tube.
Summary of the invention
The present invention aims to provide a kind of square tube roll device, containing the surely square machine of square tube of this device and the production method of square tube, realizes the object of the square tube of manufacturing machine better performances.
To achieve these goals, according to an aspect of the present invention, provide a kind of square tube roll device, square tube roll device comprises: frame, three groups of roll portions, often organizes the roll that roll portion all has an active movement, each roll is all arranged in frame, three rolls in three groups of roll portions comprise the first roll, the second roll and the 3rd roll, and the axis of each roll intersects in same plane, and form square opening after the combination of the knurling of each roll.
Further, the axis of above-mentioned first roll is arranged in the horizontal direction, and the knurling of the first roll comprises first horizontal side wall in the horizontal direction and two the first upright side walls be connected with the two ends of the first horizontal side wall respectively, the sidewall of a level of the first horizontal side wall composition square opening, two the first upright side walls form a part for the vertical sidewall of two of square opening respectively; The knurling of the second roll and the 3rd roll to be symmetrical arranged and the axes intersect of each roll forms equilateral triangle along the perpendicular bisector of the knurling of the first roll, the knurling of the second roll has second horizontal side wall and second upright side walls, the knurling of the 3rd roll has the 3rd horizontal side wall and the 3rd upright side walls, second horizontal side wall and the 3rd horizontal side wall form the sidewall of another level of square opening, and the second upright side walls and the 3rd upright side walls form the remainder of the vertical sidewall of two of square opening.
Further, above-mentioned first horizontal side wall, the first upright side walls, the second horizontal side wall, the second upright side walls, the 3rd horizontal side wall and the 3rd upright side walls are curved wall.
Further, each above-mentioned roll portion also comprises: driving shaft, and the axis along roll is arranged in frame, and roll is arranged on driving shaft; To the power transmission of driving shaft transmitting power, be arranged on one end of stretching out frame of driving shaft.
Further, each above-mentioned roll portion also comprises: inner spline housing, engages with the external splines key tooth of driving shaft; Safety collar, one end is connected with inner spline housing, and the other end is connected with power transmission.
Further, each above-mentioned roll portion also comprises: clutch shaft bearing, is positioned at roll and is arranged on driving shaft away from the side of power transmission; Second bearing, is positioned at the side of the close power transmission of roll and is arranged on driving shaft, the inwall of the second bearing and the outer wall interference fit of driving shaft; Positioning sleeve, is arranged between clutch shaft bearing and driving shaft, the outer wall of positioning sleeve and the inwall interference fit of clutch shaft bearing.
According to a further aspect in the invention, provide the surely square machine of a kind of square tube, multiple square tube roll devices that the surely square machine of square tube comprises or arranges along tubing throughput direction, square tube roll device is above-mentioned square tube roll device.
Further, the surely square machine of above-mentioned square tube comprises the multiple square tube roll devices arranged along tubing throughput direction, and four sidewalls of the square opening at least one or more square tube roll device are curved wall.
Further, four sidewalls of the square opening in the surely square machine of above-mentioned square tube in multiple square tube roll device are curved wall, and the plurality of square tube roll device is from upstream to the curved wall in downstream radius of curvature along tubing throughput direction becomes large successively.
Further, above-mentioned square tube roll device is four, and the total reduction of four square tube roll devices is between 12 ~ 21%, and the reduction ratio of each square tube roll device is between 2 ~ 7%.
Further, the surely square machine of above-mentioned square tube also comprises one or more pipe roll device, before being arranged on square tube roll device along the throughput direction of tubing.
According to another aspect of the invention, provide a kind of production method of square tube, production method comprises heating of pipe blank step, perforation step, tube rolling step, sizing step and determines measured step rapid, and sizing step comprises the one or more pipe roll device of employing and carries out sizing, forms pipe; Determine measured step and suddenly comprise pipe that sizing step is formed by the surely square machine of above-mentioned square tube side surely, form square tube.
Further, the external diameter of above-mentioned pipe is D, and the girth of square tube is L, is 1.06 ~ 1.14 determining the rapid middle edgewise compressive coefficient η of measured step, and η=π * D/L.
Further, above-mentioned perforation step adopts conic perforator perforation, and tube rolling adopts tandem mill rolling.
Further, be Φ 247mm, Φ 336mm or Φ 410mm by the external diameter of the hollow billet of above-mentioned conic perforator; And external diameter is the hollow forging of hollow billet by tandem mill rolling to be external diameter be Φ 210mm of Φ 247mm, external diameter is the hollow forging of hollow billet by tandem mill rolling to be external diameter be Φ 293mm of Φ 336mm, and external diameter is the hollow forging of hollow billet by tandem mill rolling to be external diameter be Φ 364mm of Φ 410mm.
Further, when the specification of producing above-mentioned square tube is 200 × 200mm, the square tube roll device determining the surely square machine of square tube that measured step adopts suddenly is four, and being followed successively by 233mm, 408mm, 1176mm and 3000mm along the radius of curvature that the throughput direction of tubing is from upstream to the curved wall of four square tube roll devices in downstream, unit reduction ratio is followed successively by 2.51%, 6.52%, 5.6% and 4.47%.
Three rolls of square tube roll device of the present invention are drive roll, and the roller transmission making each roll more traditional or two roller transmissions have larger deformability, can meet the rolling deformation of thick walled steel tube and extra strong pipe; In the hot rolling, four sidewalls of the square opening formed after the combination of the knurling of each roll contact with the hot pipe after sizing, further roll-force are transferred to each position of pipe, obtain the superior square tube with better mechanical property of size.And, compared with current cold-rolling process, adopt the square tube roll device production square tube with said structure, improve output and the production efficiency of square tube to a great extent, reduce production cost simultaneously.The shape of the knurling of three conventional at present roller pipe sizing mills can design by above-mentioned square tube roll device in the manner described above, thus reduce further production cost.
Accompanying drawing explanation
The Figure of description forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 shows the side view of square tube roll device of the present invention;
The A-A that Fig. 2 shows the square tube roll device shown in Fig. 1 to sectional view;
Fig. 3 shows the structural representation of the knurling of the first roll shown in Fig. 1, the second roll and the 3rd roll;
Fig. 4 shows the structural representation of the surely square machine of square tube of the present invention; And
Fig. 5 shows square tube production technological process of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
As depicted in figs. 1 and 2, in a kind of typical embodiment of the present invention, provide a kind of square tube roll device, this square tube roll device comprises frame 1 and three groups of roll portions, often organize the roll that roll portion all has an active movement, each roll is all arranged in frame 1, and three rolls in three groups of roll portions comprise the first roll 21, second roll 22 and the 3rd roll 23, the axis of each roll intersects in same plane, and forms square opening after the combination of the knurling of each roll.
Have the square tube roll device of said structure, three rolls are drive roll, and the roller transmission making each roll more traditional or two roller transmissions have larger deformability, can meet the rolling deformation of thick walled steel tube and extra strong pipe; In the hot rolling, four sidewalls of the square opening formed after the combination of the knurling of each roll contact with the hot pipe after sizing, further roll-force are transferred to each position of pipe, obtain the superior square tube with better mechanical property of size.And, compared with current cold-rolling process, adopt the square tube roll device production square tube with said structure, improve output and the production efficiency of square tube to a great extent, reduce production cost simultaneously.The shape of the knurling of three conventional at present roller pipe sizing mills can design by above-mentioned square tube roll device in the manner described above, thus reduce further production cost.
As shown in Figure 3, in a kind of preferred embodiment of the present invention, the axis of the first roll 21 of above-mentioned square tube roll device is arranged in the horizontal direction, and the knurling of the first roll 21 comprises first horizontal side wall in the horizontal direction and two the first upright side walls be connected with the two ends of horizontal side wall respectively, first horizontal side wall forms the sidewall of a level of square opening, and two the first upright side walls form a part for the vertical sidewall of two of square opening respectively; The knurling of the second roll 22 and the 3rd roll 23 to be symmetrical arranged and the axes intersect of each roll forms equilateral triangle along the perpendicular bisector of the knurling of the first roll 21, the knurling of the second roll 22 has second horizontal side wall and second upright side walls, the knurling of the 3rd roll 23 has the 3rd horizontal side wall and the 3rd upright side walls, second horizontal side wall and the 3rd horizontal side wall form the sidewall of another level of square opening, and the second upright side walls and the 3rd upright side walls form the remainder of the vertical sidewall of two of square opening.
First roll 21 of the present invention, the direction that the extended line of the axis of the second roll 22 and the 3rd roll 23 intersects each limit of the equilateral triangle of formation has multiple, preferably a leg-of-mutton edge horizontal direction is arranged, axis by the first roll 21 is arranged in the horizontal direction, and preferably its knurling adopts vibrational power flow as shown in Figure 3, the structure of the structure of the knurling of the second roll 22 and the knurling of the 3rd roll 23 as shown in Figure 3, certainly, the shape of the knurling of each roll is not limited only to shape illustrated in fig. 3, as long as the approximate square opening closed can be formed after the knurling combination of each roll.
In order to obtain better effect of rolling, preferably the first horizontal side wall, the first upright side walls, the second horizontal side wall, the second upright side walls, the 3rd horizontal side wall and the 3rd upright side walls are curved wall.The sidewall of each knurling is set to curved wall, makes knurling and pipe have larger contact area, roll-force more uniformly can be transferred on the pipe of institute's rolling, avoid pipe unbalance stress in the operation of rolling and cause the drawback of undesirable distortion.
As shown in Figure 2, each roll portion of square tube roll device of the present invention also comprises driving shaft 3 and the power transmission 4 to driving shaft 3 transmitting power, and driving shaft 3 is arranged in frame 1 along the axis of roll, and roll is arranged on driving shaft 3; Power transmission 4 is arranged on one end of stretching out frame 1 of driving shaft 3.Each roll has the driving shaft 3 corresponding with it and power transmission 4, and power transmission on driving shaft 3, thus is driven the roll be arranged on driving shaft 3 by power transmission 4 realization adjacent with reductor further.
In order to ensure being synchronized with the movement of driving shaft 3 and roll better, driving shaft 3 and roll are preferably by spline joint.
As shown in Figure 2, each roll portion of square tube roll device also comprises inner spline housing 5 and safety collar 6, and inner spline housing 5 engages with the external splines key tooth of driving shaft 3; One end of safety collar 6 is connected with inner spline housing 5, and the other end is connected with power transmission 4.By safety collar 6 and inner spline housing 5, the power synchronous that power transmission 4 transmits is transferred to driving shaft 3, further ensures the stability of square tube sizing mill work.
Preferably barreled tooth flank relatively simple for structure is adopted at the power transmission 4 of a kind of square tube roll device of the present invention.
As shown in Figure 2, each roll portion of square tube roll device also comprises clutch shaft bearing 7, second bearing 8 corresponding with each roll 2 and positioning sleeve 9, and clutch shaft bearing 7 is positioned at roll 2 and is arranged on driving shaft 3 away from the side of power transmission 4; Second bearing 8 is positioned at the side of the close power transmission 4 of roll 2 and is arranged on driving shaft 3, the inwall of the second bearing 8 and the outer wall interference fit of driving shaft 3; Positioning sleeve 9 is arranged between clutch shaft bearing 7 and driving shaft 3, the outer wall of positioning sleeve 9 and the inwall interference fit of clutch shaft bearing 7.Adopt bearings driving shaft 3, be more conducive to the motion of driving shaft 3.In the outside of clutch shaft bearing 7 and the second bearing 8, clutch shaft bearing cover 71 and the second bearing holder (housing, cover) 81 are set respectively.
As shown in Figure 4, in the another kind of typical embodiment of the present invention, additionally provide the surely square machine of a kind of square tube, one or multiple square tube roll devices 200 of arranging along tubing throughput direction, this square tube roll device 200 is above-mentioned square tube roll device.The effect with the surely square machine of square tube of said structure is that pipe is rolled into square tube by square tube roll device of the present invention by pipe.
In another preferred embodiment of the invention, the surely square machine of square tube comprises the multiple square tube roll devices 200 arranged along tubing throughput direction, and four sidewalls of the square opening at least one or more square tube roll device 200 are curved wall.When adopting the square tube roll device 200 with curved wall to carry out tube rolling, the deformation performance of pipe accesses good control, and the square tube roll device 200 had close to the sidewall of plane can be adopted when pipe levels off to square tube to carry out further rolling deformation.
In the process utilizing the surely square machine of square tube of the present invention surely square, pipe is gradually by circle change side, in order to adapt to this change procedure, preferably, four sidewalls having the square opening in multiple square tube roll device 200 in the surely square machine of square tube are curved wall, and the plurality of square tube roll device 200 is from upstream to the curved wall in downstream radius of curvature along tubing throughput direction becomes large successively.And, those skilled in the art can be simulated deformation process by finite element, concrete operations can be: first, the boundary condition such as single chassis reduction ratio, rate of deformation, coefficient of friction, finished product square tube specification of setting pipe specification, deformation temperature, square tube frame, by finite element software, deformation process is simulated again, finally, rational curved wall radius of curvature is obtained.
In a kind of specific embodiment of the present invention, the square tube roll device 200 of above-mentioned square tube sizing mill is four, and the total reduction of four square tube roll devices 200 is between 12 ~ 21%, and the reduction ratio of each square tube roll device 200 is between 2 ~ 7%.
The reduction ratio of each square tube roll device 200 is controlled between 2 ~ 7%, the total reduction of four square tube roll devices 200 is controlled between 10 ~ 21%, avoids in Sizing Process the appearance of being out of shape the excessive problem causing the dimensional accuracy of finished product and resistance to torsion to be deteriorated.
As shown in Figure 4, the surely square machine of above-mentioned square tube also comprises one or more pipe roll device 100, before this one or more pipe roll device 100 is arranged on square tube roll device 200 along the throughput direction of tubing.Pipe roll device 100 and square tube roll device 200 combine arrange be convenient to realize square tube continuous rolling, production.Pipe roll device 100 in above-mentioned fixed square machine directly adopts the pipe roll device in existing pipe sizing mill.
As shown in Figure 5, in another typical embodiment of the present invention, additionally provide a kind of production method of square tube, aforementioned production method comprises heating of pipe blank step, perforation step, tube rolling step, sizing step and determines measured step rapid, sizing step comprises the one or more pipe roll device 100 of employing and carries out sizing, forms pipe; Determine measured step and suddenly comprise pipe that sizing step is formed by the surely square machine of above-mentioned square tube side surely, form square tube.
Adopt the production method of above-mentioned square tube, pipe is obtained by after the hot rolling hollow forging of hot rolling adopts pipe roll device 100 to carry out sizing, then adopt the surely square machine of square tube of the present invention to carry out the side of determining and obtain hot rolling square tube, avoid the problem that intensity, hardness are higher, toughness plasticity is lower of cold rolling square tube, there is good impact property; And adopt above-mentioned production technology to realize consecutive production, production efficiency is higher.
In the process adopting the square tube roll device 200 of square tube surely square machine that pipe is surely square, pipe is in the process by circle change side, the girth of square tube diminishes, wall thickness approximately thickens about 5%, in order to obtain the comparatively accurate square tube of physical dimension, the external diameter of preferred pipe is D, and the girth of square tube is L, determines the rapid middle edgewise compressive coefficient η of measured step and is 1.06 ~ 1.14 and meets η=π * D/L.
The production method middle punch step of above-mentioned square tube adopts conic perforator perforation, and tube rolling adopts tandem mill rolling.Conic perforator and tandem mill coordinating operation, can not only obtain mechanical performance evenly the stronger square tube of property, resistance to torsion, and can improve the production efficiency of square tube, realize the extensive High-efficient Production of square tube.
When adopting above-mentioned production technology production square tube, the external diameter preferably by the hollow billet of conic perforator is Φ 247mm, Φ 336mm and Φ 410mm; And external diameter is the hollow forging of hollow billet by tandem mill rolling to be external diameter be Φ 210mm of Φ 247mm, external diameter is the hollow forging of hollow billet by tandem mill rolling to be external diameter be Φ 293mm of Φ 336mm, and external diameter is the hollow forging of hollow billet by tandem mill rolling to be external diameter be Φ 364mm of Φ 410mm.
In a kind of preferred embodiment of the present invention, when production specification is the square tube of 200 × 200mm, determining the square tube roll device 200 that measured step adopts suddenly is four, and being followed successively by 233mm, 408mm, 1176mm and 3000mm along the radius of curvature that the throughput direction of tubing is from upstream to the curved wall of four square tube roll devices 200 in downstream, unit reduction ratio is followed successively by 2.51%, 6.52%, 5.6% and 4.47%.When adopting above-mentioned square tube roll device 200 to carry out fixed side, those skilled in the art can according to the principle of η=π * D/L and about 5% buildup thickness select suitable sizing after pipe carry out the side of determining.
Below with reference to embodiment and comparative example, further illustrate beneficial effect of the present invention.
The present invention is that the production of the square tube of 200 × 200 × 45mm is described of the present invention for specification, because the specification square tube that is 200 × 200 × 45mm belongs to the comparatively large and square tube of the ideal format that wall thickness is thicker of external diameter, there is larger production difficulty and representativeness.
Embodiment 1
It is the blank preheating of 280mm by external diameter, then in annular furnace, adopt five sections of heating, heating one section of temperature is 1020 DEG C ± 10 DEG C, and heating two sections of temperature is 1160 DEG C ± 10 DEG C, heating three sections of temperature is 1250 DEG C ± 10 DEG C, and heating four and five sections of temperature is 1290 DEG C ± 10 DEG C; Then 1280 DEG C ± 10 DEG C soaking, total heat time is 3.5h.
Conic perforator perforation is adopted by blank after soaking to obtain the hollow billet that specification is Φ 336 × 50mm; Then tandem mill is adopted to be rolled into the hollow forging that specification is Φ 280 × 42mm this hollow billet; Adopted by hollow forging the pipe roll device of 247 series to carry out sizing and obtain the pipe that specification is Φ 247 × 43mm; Then make above-mentioned pipe undertaken by four square tube roll devices the side of determining successively, obtain the seamless hot rolling square tube that specification is 200 × 200 × 45mm, the specification of the square tube roll device of the sequencing passed through by pipe arrangement and rotating speed are in table 1.
Table 1
Choose any two embodiment 1 square tubes, and test the mechanical property under their physical dimension and room temperature, physical dimension test result is in table 2, and mechanical experimental results is in table 3.
Table 2
Table 3
As can be seen from the data in table 2 and table 3, the various physical dimension of the square tube obtained by production method of the present invention and mechanical property all can meet the requirement of European EN10210 standard, can use as square tube for building completely.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the surely square machine of square tube, is characterized in that, the surely square machine of described square tube comprises four square tube roll devices (200) of arranging along tubing throughput direction, and described square tube roll device (200) comprising:
Frame (1); Three groups of roll portions, often organize the roll that roll portion all has an active movement, each described roll is all arranged in described frame (1), three rolls in three groups of roll portions comprise the first roll (21), the second roll (22) and the 3rd roll (23), the axis of each described roll intersects in same plane, and form square opening after the combination of the knurling of each described roll, wherein, each described roll portion also comprises:
Driving shaft (3), the axis along described roll is arranged in described frame (1), and described roll is arranged on described driving shaft (3);
To the power transmission (4) of described driving shaft (3) transmitting power, be arranged on one end of stretching out described frame (1) of described driving shaft (3),
Inner spline housing (5), engages with the external splines key tooth of described driving shaft (3);
Safety collar (6), one end is connected with described inner spline housing (5), and the other end is connected with described power transmission (4),
Four sidewalls of the square opening in the surely square machine of described square tube in multiple square tube roll device (200) are curved wall, and the plurality of square tube roll device (200) is from upstream to the curved wall in downstream radius of curvature along tubing throughput direction becomes large successively, described square tube roll device (200) is four, and the total reduction of four described square tube roll devices (200) is between 12 ~ 21%, the reduction ratio of each described square tube roll device (200) is between 2 ~ 7%.
2. the surely square machine of square tube according to claim 1, is characterized in that,
The axis of described first roll (21) is arranged in the horizontal direction, and the knurling of described first roll (21) comprises first horizontal side wall in the horizontal direction and two the first upright side walls be connected with the two ends of described first horizontal side wall respectively, described first horizontal side wall forms the sidewall of a level of described square opening, and two described first upright side walls form a part for the vertical sidewall of two of described square opening respectively;
The knurling of described second roll (22) and described 3rd roll (23) to be symmetrical arranged and the axes intersect of each described roll forms equilateral triangle along the perpendicular bisector of the knurling of described first roll (21), the knurling of described second roll (22) has second horizontal side wall and second upright side walls, the knurling of described 3rd roll (23) has the 3rd horizontal side wall and the 3rd upright side walls, described second horizontal side wall and the 3rd horizontal side wall form the sidewall of another level of described square opening, described second upright side walls and described 3rd upright side walls form the remainder of the vertical sidewall of two of described square opening.
3. the surely square machine of square tube according to claim 2, is characterized in that, described first horizontal side wall, the first upright side walls, the second horizontal side wall, the second upright side walls, the 3rd horizontal side wall and the 3rd upright side walls are curved wall.
4. the surely square machine of square tube according to claim 1, is characterized in that, each described roll portion also comprises:
Clutch shaft bearing (7), is positioned at described roll and is arranged on described driving shaft (3) away from the side of described power transmission (4);
Second bearing (8), be positioned at the side of the close power transmission (4) of described roll and be arranged on described driving shaft (3), the inwall of described second bearing (8) and the outer wall interference fit of described driving shaft (3);
Positioning sleeve (9), is arranged between described clutch shaft bearing (7) and described driving shaft (3), the outer wall of described positioning sleeve (9) and the inwall interference fit of described clutch shaft bearing (7).
5. the surely square machine of square tube according to any one of claim 1 to 4, it is characterized in that, the surely square machine of described square tube also comprises one or more pipe roll device (100), before being arranged on described square tube roll device (200) along the throughput direction of described tubing.
6. a production method for square tube, is characterized in that, described production method comprises heating of pipe blank step, perforation step, tube rolling step, sizing step and determine measured step rapid,
Described sizing step comprises the one or more pipe roll device (100) of employing and carries out sizing, forms pipe;
Describedly determine measured step and suddenly comprise pipe that described sizing step is formed by the surely square machine of the square tube according to any one of claim 1 to 5 side surely, form square tube.
7. production method according to claim 6, is characterized in that, the external diameter of described pipe is D, and the girth of described square tube is L, described determine measured step rapid in edgewise compressive coefficient η be 1.06 ~ 1.14, and η=π * D/L.
8. production method according to claim 6, is characterized in that, described perforation step adopts conic perforator perforation, and described tube rolling adopts tandem mill rolling.
9. production method according to claim 8, is characterized in that, is Φ 247mm, Φ 336mm or Φ 410mm by the external diameter of the hollow billet of described conic perforator; And external diameter is the hollow forging of hollow billet by described tandem mill rolling to be external diameter be Φ 210mm of Φ 247mm, external diameter is the hollow forging of hollow billet by described tandem mill rolling to be external diameter be Φ 293mm of Φ 336mm, and external diameter is the hollow forging of hollow billet by described tandem mill rolling to be external diameter be Φ 364mm of Φ 410mm.
10. the production method according to any one of claim 6 to 8, it is characterized in that, when the specification of producing described square tube is 200 × 200mm, the described square tube roll device (200) determining the surely square machine of square tube that measured step adopts suddenly is four, and being followed successively by 233mm, 408mm, 1176mm and 3000mm along the radius of curvature that the throughput direction of described tubing is from upstream to the curved wall of four described square tube roll devices (200) in downstream, unit reduction ratio is followed successively by 2.51%, 6.52%, 5.6% and 4.47%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351598.XA CN102861766B (en) | 2012-09-20 | 2012-09-20 | Square tube rolling device, square tube sizing mill with same and production method of square tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210351598.XA CN102861766B (en) | 2012-09-20 | 2012-09-20 | Square tube rolling device, square tube sizing mill with same and production method of square tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102861766A CN102861766A (en) | 2013-01-09 |
| CN102861766B true CN102861766B (en) | 2015-04-01 |
Family
ID=47441043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210351598.XA Active CN102861766B (en) | 2012-09-20 | 2012-09-20 | Square tube rolling device, square tube sizing mill with same and production method of square tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102861766B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103316916A (en) * | 2013-06-24 | 2013-09-25 | 衡阳华菱钢管有限公司 | Square tube former and production method of square tubes |
| CN104128373A (en) * | 2014-08-12 | 2014-11-05 | 无锡市瑞尔精密机械股份有限公司 | Novel machine set for producing hot rolling seamless square steel pipe |
| CN105798066A (en) * | 2016-05-10 | 2016-07-27 | 沈阳重机重矿机械设备制造有限公司 | Cantilever Y-shaped rolling mill |
| CN109226267A (en) * | 2018-07-14 | 2019-01-18 | 大连冶金工具厂有限公司 | A kind of round tube becomes the milling method and its pass structure of square tube |
| CN110722015A (en) * | 2018-07-17 | 2020-01-24 | 欣诺冷弯型钢产业研究院（曹妃甸）有限公司 | Cold and hot composite forming square and rectangular pipe forming system with thickened corners |
| CN109706392B (en) * | 2018-12-25 | 2020-08-21 | 衡阳华菱钢管有限公司 | Square tube for trailer axle, preparation method thereof and trailer axle |
| CN109702014B (en) * | 2018-12-25 | 2020-07-14 | 衡阳华菱钢管有限公司 | Trailer axle squaring device, trailer axle and preparation method thereof |
| CN109706393B (en) * | 2018-12-25 | 2020-08-21 | 衡阳华菱钢管有限公司 | Trailer axle for low-temperature environment and preparation method thereof |
| CN114733911A (en) * | 2022-04-15 | 2022-07-12 | 衡阳华菱钢管有限公司 | Pipe processing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0441006A (en) * | 1990-06-06 | 1992-02-12 | Nippon Steel Corp | Manufacture of seamless square steel tube and its device |
| CN2437422Y (en) * | 2000-07-13 | 2001-07-04 | 陈永惠 | Three-high mill with three transmission shafts |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3202145B2 (en) * | 1995-04-25 | 2001-08-27 | ナカジマ鋼管株式会社 | Manufacturing method of large square steel pipe and large round steel pipe |
| CN1066075C (en) * | 1995-07-28 | 2001-05-23 | 中岛钢管株式会社 | Mfg. method for square steel pipe and mfg. method for circular steel pipe |
| 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 |
| CN102211110A (en) * | 2010-12-24 | 2011-10-12 | 天津君晟成套设备有限公司 | Servo screwdown continuous rolling frame with mill roll gap control mechanism |
| CN102303065B (en) * | 2011-06-21 | 2013-08-28 | 攀钢集团成都钢钒有限公司 | Method for manufacturing seamless steel tube for vehicle-mounted large-diameter high pressure gas cylinder |
| CN202803746U (en) * | 2012-09-20 | 2013-03-20 | 衡阳华菱钢管有限公司 | Square pipe roll device and square pipe squaring machine with the same |
-
2012
- 2012-09-20 CN CN201210351598.XA patent/CN102861766B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0441006A (en) * | 1990-06-06 | 1992-02-12 | Nippon Steel Corp | Manufacture of seamless square steel tube and its device |
| CN2437422Y (en) * | 2000-07-13 | 2001-07-04 | 陈永惠 | Three-high mill with three transmission shafts |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102861766A (en) | 2013-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102861766B (en) | Square tube rolling device, square tube sizing mill with same and production method of square tube | |
| CN103316916A (en) | Square tube former and production method of square tubes | |
| CN102245320B (en) | Utilize the method for cold rolling manufacture seamless metal pipe | |
| JP7285320B2 (en) | Heat-cooled square/rectangular steel pipe with thickened corners and manufacturing method thereof | |
| CN102371288A (en) | Preparation method of high-precision and high-strength titanium alloy seamless tube | |
| CN105414239B (en) | Ripple faying face metal composite pipe technique in one kind rolling | |
| CN101623717B (en) | Manufacture method of D-shaped copper tube and forming device thereof | |
| CN108421839A (en) | A kind of flat-bulb steel diplopore model extrusion method | |
| CN202803746U (en) | Square pipe roll device and square pipe squaring machine with the same | |
| CN101439365B (en) | Method for rolling seamless steel pipe from die-casting hollow steel ingot | |
| CN109909298B (en) | Production line of excellent steel and deformed steel bar and production method of excellent steel and deformed steel bar | |
| CN101579702B (en) | New technique for producing high alloy steel high-end pipe by adopting cross rolling elongation technology | |
| CN203408983U (en) | Square tube squaring machine | |
| CN201253641Y (en) | Hot rolled seamless steel tube manufacturing system | |
| CN106825106A (en) | The technique of thin-walled hot rolled seamless steel tube in a kind of double-core axle two-roller skew-rolling production | |
| CN101249508A (en) | Method for producing seamless steel pipe with reversible reciprocating periodic time hot rolling technique | |
| CN109702014B (en) | Trailer axle squaring device, trailer axle and preparation method thereof | |
| CN105290281B (en) | The production method of the nickeliferous ring forging of large thick-wall | |
| CN105583230A (en) | Large thick-wall special-shaped pipe cold roll forming method | |
| CN107790493A (en) | A kind of milling method of stud | |
| CN102172627B (en) | Composite insulator hardware helical groove skew rolling roll groove design method | |
| CN1695839B (en) | Roller trio skew rolling method for cold perforating and cold chambering ingot | |
| CN209866963U (en) | Production line for high-quality steel and deformed steel bar | |
| CN101581555A (en) | Heat exchange tube with inner surface provided with convex independent drop-shaped fins | |
| CN204159642U (en) | For the production line of rolling cored steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |