• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method and apparatus for producing a thin metallic tube having a trailing end portion which optionally can be formed with an external diameter substantially corresponding to or varying from that of the remaining rolled portion of the tube rolled in a three roller skewed rolling mill. This is accomplished by causing an angular unisonal displacement of the roller axes to effect an enlargement of the rolling area, and at least during part of the roller movement, a second movement of the roller perpendicular to the axis of the tube.
    公开号:SU969143A3
    申请号:SU792712951
    申请日:1979-01-17
    公开日:1982-10-23
    发明作者:Фон Дорн Вальтер；Штайнбрехер Хайнрих
    申请人:Маннесман Аг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the processing of metals by pressure, and in particular to equipment for rolling pipes, and can be used to obtain thin-walled pipes.
    Closest to the invention, the technical reality is the working stand of a three-roll mill, which contains fixed and movable flanges. Pillows are installed in the flanges with the possibility of their radial movement, and in the pillows are self-aligning bearings, which are the bearings of the rolls. Pillows are connected with lead screws associated with hydraulic cylinders mounted on flanges. The spindles are screwed into the worm wheel and the threaded sleeve mounted motionless in the axial direction, the thread of which is made so that there is an axial clearance between their thread and the thread of the spindle [1].
    A disadvantage of the known stand is the lack of a rigid kinematic connection between the rotary device of the flange and the device for radial feeding of pillows. As a result of the inconsistency of the actions of these devices, when the rolling angle changes, the pipe wall thickness changes, which is undesirable when rolling pipes with a constant wall thickness. When rolling pipes with varying wall thicknesses, the capabilities of the known mill are negligible.
    The purpose of the invention is improving the quality of rolled pipes and expanding technological capabilities.
    This goal is achieved by the fact that the three-roll stand of the pipe rolling mill 20, which contains flanges fixed and rotatable from the rotary device, pillows placed in radial guide flanges, rolling rolls installed in pillows on self-aligning bearings , threaded bushings located in the flanges, and spindles connected by a threaded connection to the threaded bushings and connected to the pillows, equipped with gears mounted on a movable flange and gear racks mounted on a fixed flange, and threaded bushings installed in a movable flange are made with a gear rim and are connected by gearing, which, in turn, are connected by gearing. ,
    Moreover, each gear wheel is made in the form of two gear segments, the diameter of the pitch circle of the gear segment being engaged with the threaded sleeve,. 5% more than the diameter of the pitch circle of the gear segment, connected by gearing with a gear rack.
    In addition, the three-roll mill stand is equipped with an additional rotary device, and a ring is mounted on the stationary flange so that it can rotate concentrically to the rolling axis, with gear racks mounted on the ring and the ring connected to an additional rotary device.
    In FIG. 1 shows a three-roll stand of a helical rolling mill, a partial section; figure 2-3 is the same front view; in FIG. 3 is a section AA in FIG. 1 ·, in FIG. 4 is a diagram of a change in a roll solution depending on a change in the rolling angle when rolling pipes with a constant 4 wall thickness; in FIG. 5 ~ three-roll stand of the cross-helical rolling mill with increased adjustment capabilities; in FIG. 6 is a section BB in FIG. 5; on fig, 7 'DI- 4 agram of the change in the roll solution and depending on the change in the angle of rolling during rolling of pipes with the usual thickening of their ends; in FIG. 8 - the same, when rolling pipes with a significant 5 thickening of their ends.
    The three-roll stand consists of rolling rolls 1. The axis 2 of the roll 1 is supported by self-aligning bearings 3 and 4, mounted in 5 cushions 5 and 6. The coupling 7 is used to connect to an articulated shaft (not shown), through which the rolling roll is driven 1. The flange 8 is stationary, the flange 9 is rotatable in an annular motionless support pillars 10. The travel spindles 11 and 12 are designed to move the pillows 5 and 6 in the radial guides of the flanges 8 and 9. The drive spindles are driven by devices 13 and 14 for installing the rolls associated with the drive shafts 15 and 16. The threaded sleeve 17, in contrast to the threaded sleeve 18, is made with a gear ring 19 and is engaged with the gear wheel 20 mounted on the movable flange 2 with the possibility of rotation on the axis 21 . The gear wheel 20, in turn, is engaged with the gear rack 22, mounted on a ring 23 mounted on a fixed flange
    8. The threaded sleeve 17 is installed in the movable flange 9 on the radial bearing 24 and the angular contact bearing 25. Thus, the pillow 5 of the movable flange 9 has a rigid kinematic connection with the stationary flange through the spindle 12, the threaded sleeve 17, the gear wheel 20 and the gear rack 22. The gear wheel 20 is made with two gear segments 26 and 27, and the diameter of the pitch circle of the gear segment 26, which is meshed with the threaded sleeve 18, is 4-6 times larger than the diameter of the pitch circle of the gear segment 27, nan meshing with the gear rack 22. The fixed flange 8 and the support legs 10 are rigidly fixed to the frame 28. To rotate the movable flange E is a rotary device 29, made in the form of a pneumatic or hydraulic cylinder, the rod 30 of which is pivotally connected to the movable flange 9.
    In a three-roll stand with increased adjustment possibilities (FIGS. 5 and 6), the ring 23 is rotatably concentric with respect to the rolling axis and is connected with an additional rotary device 31, and two gear wheels 32 and 33 are fixed on the axis 21, the gear the wheel 32 is engaged with the threaded sleeve 17, and the gear 33 with the gear rack 22. '
    The crate works as follows.
    Using devices 13 and 14, connected with pillows 5 and 6 through the travel spindles 11 and 12, Set the necessary roll rolling solution. The rolls are informed of the rotation and the workpiece is fed into the rolling zone. The rolls capture the workpiece and form a thin-walled tube, while the angle between the 10 axes of the 2 rolls and the axis of the tube is large enough, as a result of which the feed is also large enough. Immediately before the rear end of the billet enters the rolling zone, this angle is reduced by · 5 by rotating the movable flange 9 from the rotary device 29. When the movable flange 9 is rotated, the gear 20 rolls along the gear rack 22 mounted on the fixed flange-20 8, and rotates the threaded sleeve 18. Since the threaded sleeve 17 is located in the movable flange 9 without the possibility of axial movement, as a result of rotation, it moves the idler spindle 12 and the associated cushion 5 in the direction of the rolling axis' and compensates way they increase the roll gap if the angle between the axes of the rollers and the axis of rollers 30 pro-.
    Line A in FIG. Figure 4 shows the change in the roll solution with a change in the rolling angle, but the pillows in the flanges are unchanged, line B — from ~ 35, the change in the roll solution due to the rotation of the threaded sleeve. Line C, being the result of two lines A and B, shows the change in the roll solution in the proposed mill at 40 changes in the rolling angle. The diagram shows that the deviation of the pipe thickness with a change in the rolling angle is only 0.3-0.4 mm. Due to the insignificance of these deviations, the obtained 4J pipe does not require refinement. In this way, pipes are obtained without thickening the ends.
    In a three-roll mill stand with increased adjustment capabilities (Figs. 5 and 6), pipes can be rolled both without thickening of the ends, and with the usual and even significant thickening of the ends. When rolling pipes without thickening the ends, the ring 23 is held motionless by locking the additional rotary device 31 and the mill works in this case as described.
    For pipes with the usual thickening of the ends, i.e. 2.22.4 mm, the ring 23 is rotated in the same direction and at the same angle as the flange 9. This is achieved due to the fact that the additional rotary device 31 is turned on at idle. As a result, when the flange 9 is rotated, the gear wheel 35 moves the gear rack 22 together with the ring 23, and the threaded sleeve 17 does not rotate. A diagram of the change in the solution of rolls in this case is shown in FIG. 7.
    To obtain pipes with a significant thickening of the ends, the ring 23 is also rotated in the same direction as the flange. In this case, the movement of the ring 23 can be started with some delay, but completed simultaneously with the end of rotation of the movable flange 9. The diagram of the change in the roll solution in this case is shown in FIG. 8, where line A shows the change in the roll solution with a change in the rolling angle at the same position of the pillows in the flanges, line B - change in the roll solution due to rotation of the threaded sleeve, ·, line C, being the result of two lines A and B, shows the change in the roll solution when changing rolling angle.
    In such a three-roll stand, it is also possible to roll pipes with narrowed pipe ends, which is achieved by the oncoming movement of the movable end 23 and the flange 9.
    Thus, in the proposed stand, it is possible to roll thin-walled pipes with a constant wall thickness over their entire length, while the pipe does not acquire a club shape, is not blocked and does not break. In addition, you can roll pipes with a given shape of their ends, for example, with thickened or narrowed ends. Such pipes, in particular, are necessary for oil fields.
    权利要求:
    Claims (2)
    [1]
    new in pillows on self-aligning bearings, threaded bushings placed in flanges, and; One screws connected by a threaded connection with threaded bushings and connected to pillows are fitted with gear wheels mounted on a movable flange and toothed rails fixed on a fixed flange, and the threaded bushings mounted in a movable flange are made with a gear rim and are engaged with gear wheels. which in turn are engaged with the racks. In this case, each gear wheel is complete in the form of two gear segments, with the pitch diameter of the gear segment connected with the threaded bushing 5% larger than the diameter of the pitch circle of the gear segment meshing with the rack. In addition, the three-roll mill stand is equipped with an additional swivel device, and a ring is mounted on a fixed flange for rotationally concentric to the axis of the rollers, with the gear rails attached to the ring, and the ring is connected to the auxiliary rotary device. FIG. 1 shows a three-roll stand of a helical rolling mill, a partial section; Fig.2to the same, front view; in fig. 3 is a section A-A in FIG. one; in fig. 4 is a diagram of the variation of the roll solution as a function of the change in the rolling angle when rolling tubes with constant wall thickness; in fig. 5 three-roll stand of helical rolling mill with increased adjustment possibilities; in fig. 6 - time cut BB in FIG. 5i in FIG. 7 Diagram of the change in the roll solution as a function of the change in the rolling angle when rolling tubes with the usual thickening of their ends; in fig. 8 - the same, when rolling tubes with a significant thickening of their ends. The three-roll stand consists of rolling rolls 1. The roll-on axis 2 of the roll 1 is supported on self-aligning bearings 3 and 4 mounted in the cushions and 6. The mufga 7 serves to connect to the articulated shaft (not shown) through which the rolling roll 1 is driven. The flange 8 is stationary, the flange 9 is rotatably mounted in annular fixed support struts 10. The running spindles 11 and 12 are designed to move the pillows 5 and 6 in the radial guide flanges 8 and E. The drive spindles are driven by devices 13 and 1 for mounting the rolls connected to the drive shafts 15 and 16. The threaded sleeve 17, unlike the threaded sleeve 18, is provided with a gear ring 19 and engages with a gear wheel 20. mounted on a movable flange 2 so as to rotate on axis 21. Gear wheel 20, in turn, is engaged with gear rack 22, mounted on ring 23 mounted on fixed flange 8, Threaded sleeve 17 is installed in movable flange 9 on radial bearing and angular contact bearing 25. Thus, scam 5 of the movable flange 9 has a rigid kinematic connection with a fixed flange through the spindle 12, the threaded sleeve 17, the gear wheel 20 and the toothed rack 22. The gear wheel 20 is made with two gear segments 2b and 27, and the pitch diameter of the gear segment 2b, located in engagement with the threaded bushing 18, is k-times the diameter of the pitch circle of the toothed segment 27, and engages the gear in engagement with the toothed rack 22. The fixed flange 8 and support struts I) are rigidly fixed on the base 28. Sliping the movable flange 9 serves as a pivoting device 29, made in the form of a pneumatic or hydraulic cylinder, JUTOK 30 of which is pivotally connected to the movable flange 9. In a three-roll stand with increased adjustment possibilities (Figs 5 and 6), the ring 23 is rotatably concentric with the axis rolling and connected with an additional swivel device 31, and on axis 21 two gear wheels 32 and 33 are rigidly interconnected, the gear wheel 32 engages with the threaded sleeve 17, and gear wheel 33 - with a gear rack 22. Kle s works as follows. Using the devices 13 and k, connected to the pads 5 and 6 via the running spindles 11 and 12, the necessary rolling rolling solution is established. The rollers are reported to rotate and the billet is fed into the rolling zone. The rolls capture the workpiece and form a bone pipe, while the angle between the axis 2 of the rolls and the axis of the pipe is large enough, as a result of which the feed is also quite large. Immediately before entering the rear end of the billet into the rolling zone, the said angle is reduced by rotating the movable flange 9 from the rotator 29 P by rotating the movable flange 9, the gear wheel 20 rolls along the rack 22, which is fixed to the stationary one. the flag 8, and rotates the threaded sleeve 18. Since the threaded sleeve 17 is located in the movable flange 9 without the possibility of axial movement, as a result of rotation it moves the driving spindle 12 and the associated pillow 5 in the direction of the rolling axis and thus compensates for the increase in roll solution while reducing the angle between the axis of the rolls and the axis of rolling. Line A in FIG. shows the change in the roll solution when the rolling angle changes, but the position of the pillows in the flanges is unchanged; line B shows the change in the roll solution due to the rotation of the threaded sleeve. Line C, being the result of two lines A and B, shows the change in the roll solution in the proposed mill as the rolling angle changes. It can be seen from the diagram that the deviations of the pipe thickness when the rolling angle is changed is only 0.3-0.4 mm. Due to the insignificance of these deviations, the resulting pipe does not require modification. Thus, pipes are obtained without thickening the ends. In the three-roll mill stand with increased adjustment possibilities (Figs. 5 and 6), it is possible to roll pipes both without thickening the ends, or with a usual and even significant thickening of the ends. When rolling the tubes without thickening the ends, the ring 23 is held still by blocking the additional rotating device 31 and the mill operates in this case similarly to that described. To produce tubes with a normal thickening of the ends, i.e. A pier of 2.22, k mm, the ring 23 rotates in the same direction and at the same angle as the flange 9. This is achieved due to the fact that the additional turning device 31 is turned on to idle. As a result, when the flange 9 is rotated, the gear 35 moves the rack 22 together with the ring 23, and the threaded sleeve 17 does not rotate. The diagram for the change in the solder roll is here shown in fig. 7. receiving pipes with a significant thickening of the ends, the ring 23 is also rotated in the same direction as the flange. In this case, the movement of the ring 23 can be started with some delay, but is completed simultaneously with the end of the rotation of the movable flange 9. The diagram of the change in the roll solution in this case is shown in FIG. 8, where line A represents the change in the roll solution when the rolling angle changes, but the position of the pillows in the flanges remains unchanged, and line B shows the change in the roll solution due to the rotation of the threaded bushing, line C, resulting in two lines A and B, shows the change in the roll solution when changing the rolling angle. In such a three-roll stand, it is also possible to roll pipes with tapered pipe ends, which is achieved by the opposite movement of the movable end 23 and the flange 9. Thus, in the proposed stand, thin-walled pipes with constant wall thickness can be rolled all along their length. the club form is not blocked and does not tear. In addition, you can roll the pipe with a given shape of their ends, for example, with thickened or tapered ends. Such pipes, in particular, are required for oil fields. Claims. 1. Three-roll stand of helical rolling mill tube containing stationary and movable, rotatable flanges from the rotator, pillows placed in the radial 7 flanges, rolls installed in cushions on self-aligning bearings, threaded bushings ... placed in flanges and spindle screws, which are threadedly connected to threaded bushings and connected to cushions, in order to improve the quality of rolled pipes and extend technological With its capabilities, it is equipped with gears mounted on a movable flange and toothed rails fixed to a fixed flange, and threaded bushings mounted in the movable flange are made with gears and are meshed with gear wheels .
    [2]
    2. The cage according to claim 1, characterized in that each gear is made in the form of two 8/3 curved segments, and the pitch diameter of the gear segment connected with the threaded bushing is larger than the pitch diameter of the toothed segment interconnected meshing with the toothed rack, 3, the cage according to claim 1, characterized in that it is provided with an additional pivoting device and not a fixed flange, the ring is rotatably mounted. concentric to the axis of rolling, with the tooth-Eata rails attached to the ring, and the ring associated with an additional turning device. Sources of information taken into account in the examination 1. Cage company Mannesmay-Meer. Survey NIIinformt zhmash. Three-roll stands for mill-screw rolling, Moscow, 1978 p. 12-13 (prototype).
    .: L.
    fig 5
    类似技术:
    公开号 | 公开日 | 专利标题
    SU969143A3|1982-10-23|Three-roll stand for helical rolling of pipes
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    US3890821A|1975-06-24|Cold pilger rolling mill and method for the rolling of tubes
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    SU733748A1|1980-05-15|Roll stand for helical rolling mill
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    JPH06254608A|1994-09-13|Three roll piping mill
    SU187710A1|ROTATING WORKING STAINING MILL COLD PIPE ROLLING
    SU1357093A2|1987-12-07|Working stand for cross-screw rolling mill
    同族专利:
    公开号 | 公开日
    ATA882978A|1981-06-15|
    AT365482B|1982-01-25|
    JPS58102203U|1983-07-12|
    DE2814493B2|1980-04-17|
    DE2814493C3|1980-12-18|
    CA1110884A|1981-10-20|
    IT1110051B|1985-12-23|
    PL212210A1|1979-11-05|
    JPS54132456A|1979-10-15|
    DE2814493A1|1979-10-04|
    JPS6227281Y2|1987-07-13|
    US4242894A|1981-01-06|
    FR2421006A1|1979-10-26|
    GB2017555B|1982-05-06|
    FR2421006B1|1982-11-05|
    IT7919208D0|1979-01-11|
    GB2017555A|1979-10-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    RU2717425C1|2016-10-11|2020-03-23|Смс Груп Гмбх|Piercing mill|US2060768A|1936-08-07|1936-11-10|Timken Roller Bearing Co|Tube mill|
    DE846384C|1941-05-24|1952-08-11|Demag Ag|Angled rolling mill with three or more rolls for the production of seamless tubes|
    US2336397A|1941-08-16|1943-12-07|Reed Roller Bit Co|Method of forming tubes|
    CA919958A|1969-11-05|1973-01-30|Sumitomo Metal Industries, Ltd.|Piercing rolling apparatus for producing rolled material free from surface torsion|
    FR2181096B1|1972-04-20|1977-02-04|Mannesmann Meer Ag|
    JPS4924792A|1972-07-07|1974-03-05|
    SU623595A1|1977-01-28|1978-08-20|Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт|Method of helical expansion of tubes in three-high mill|JPS6364250B2|1981-07-24|1988-12-12|
    JPS58184004A|1982-04-21|1983-10-27|Ishikawajima Harima Heavy Ind Co Ltd|Drawing device of pipe|
    FR2561950B1|1984-03-28|1987-11-13|Vallourec|METHOD FOR ADJUSTING A ROLLER WITH OBLIQUE CYLINDERS AND A ROLLER FOR CARRYING OUT SAID METHOD|
    JP2703814B2|1989-12-04|1998-01-26|住友重機械工業株式会社|Inner housing type multiple roll rolling mill|
    AU2003903206A0|2003-06-23|2003-07-10|Anthony Kastropil|Apparatus for reducing the diameter of round pipe and tubing|
    CN101947554B|2010-08-05|2012-04-18|太原通泽重工有限公司|Feeding angle adjusting device of three-roller skew rolling mill|
    CN103042366B|2013-01-14|2015-04-08|湖南金龙国际铜业有限公司|Manufacturing technique for copper pipes for magnetrons|
    CN105598170A|2015-12-30|2016-05-25|中国钢研科技集团有限公司|Steel tube sizing process|
    CN105499272A|2015-12-31|2016-04-20|林州凤宝管业有限公司|Pipe binding device of thin wall seamless steel pipe hot mill|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19782814493|DE2814493C3|1978-03-31|1978-03-31|Cross rolling mill|
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