Asymmetric rolling device and box assembly device

Abstract

The present invention relates to an asymmetric rolling device and an assembly box device capable of improving physical properties of a material, the asymmetric rolling device comprising: a first working roll in contact with a first surface of a material to be rolled of a blank; the second working roll is in contact with the second surface of the blank and has a second radius larger than the first radius of the first working roll so as to perform asymmetric rolling on the blank; a driving roller formed above or below the first working roller to drive the first working roller in contact with the first working roller; the driving device is used for driving the second working roller or the driving roller; and an assembly box device which is in contact with the first working roll without interfering with the linear movement path of the rolled material and supports the first working roll in the front-back direction.

Description

Technical Field

[0001] The invention relates to an asymmetric rolling device and an assembly box device, and more specifically, to an asymmetric rolling device and an assembly box device capable of improving the physical properties of materials. Background Art

[0002] Generally, in order to process metal parts into a form such as a plate with certain specifications, a rolling process is usually performed. In this rolling process, as the thickness of the billet (the material to be rolled) changes, the microstructure inside the billet will also change accordingly.

[0003] The microstructural changes of the billet will orient the crystals in a preferred orientation, thereby generating texture. The texture generated by rolling is closely related to the material properties of the billet, such as formability.

[0004] Therefore, by controlling the texture of the billet during the rolling process, the material properties of the billet after rolling, such as formability, can be improved.

[0005] An asymmetric rolling technology has been developed in the prior art, which utilizes at least one pair of working rolls with different radii to improve the physical properties of the material so that shear deformation can be well achieved in the material with weak formability at room temperature. Summary of the invention

[0006] Technical issues

[0007] However, this existing asymmetric rolling technology is prone to deformation because the working rolls with relatively small radius are subjected to strong reaction forces in the front-to-back direction, that is, in the forward direction of the billet, during the rolling process. During this process, various undesirable phenomena may occur in the billet, such as uneven wave, buckle, uneven thickness, distortion, and tilting to one side, which may cause the working rolls to be severely deformed and exceed the elastic range, resulting in deviation from the normal position or damage, and many other problems.

[0008] The present invention aims to solve many problems including the above problems, and to provide an asymmetric rolling device and an assembly box device, which can firmly counteract the reaction force in the front-to-back direction by using an assembly box device that can support the first working roll in the front-to-back direction, and can actively respond to and align and restore the first working roll to a normal position even if it is deformed. However, the above technical problems are exemplary, and the scope of the present invention is not limited thereto.

[0009] Technical Solution

[0010] In order to solve the above technical problems, the asymmetric rolling device provided by the present invention may include: a first working roll, which contacts the first surface of the billet; a second working roll, which contacts the second surface of the billet and has a second radius greater than the first radius of the first working roll, so as to asymmetrically roll the billet; a driving roll, which is formed above or below the first working roll, so as to drive the first working roll in contact with the first working roll; a driving device, which is used to drive the second working roll or the driving roll; and an assembly box device, which contacts the first working roll without interfering with the linear movement path of the billet and supports the first working roll along the front-rear direction.

[0011] In addition, according to the present invention, the assembly box device may include: an assembly box body, which supports the first working roller while allowing the first working roller to rotate freely; and a first idle roller, which is freely rotatably formed on the assembly box body and formed in front of or behind the first working roller to support the first working roller in the front-to-back direction in contact with the first working roller.

[0012] In addition, according to the present invention, the first idle roll may include: a 1-1 idle roll formed in front of the first working roll, and a second height of the second center axis is equal to a first height of the first center axis of the first working roll; and a 1-2 idle roll formed behind the first working roll, and a third height of the third center axis is equal to the first height of the first center axis of the first working roll.

[0013] In addition, according to the present invention, the assembly box device may further include: a first guide roller, which is freely rotatably formed on the assembly box body and is formed in front of or behind the first idle roller to support the first idle roller along the front-to-back direction or the circumferential direction of the driving roller in contact with the first idle roller.

[0014] In addition, according to the present invention, the first guide roller may include: a 1-1 guide roller, which is formed in front of the first working roller and has a fourth height of a fourth center axis greater than a first height of a first center axis of the first working roller; and a 1-2 guide roller, which is formed behind the first working roller and has a fifth height of a fifth center axis greater than the first height of the first center axis of the first working roller.

[0015] In addition, according to the present invention, the assembly box device may further include: a plurality of push roller units (Push Rollunit), which are formed on a push bar (Push bar) provided in front of or behind the assembly box body and are arranged at a certain interval to support at least any one of the first working roller, the first idle roller, and the first guide roller along the front-to-back direction or the circumferential direction of the driving roller.

[0016] In addition, according to the present invention, the pushing roller unit may include: at least one pushing roller, which contacts and rolls at least any one of the first working roller, the first idle roller, and the first guide roller; a movable plate, which can support the pushing roller while allowing the pushing roller to rotate freely; and a movable plate forward and backward moving device, which is arranged on the push rod and is used to drive the movable plate to move forward and backward.

[0017] Furthermore, according to the present invention, the movable panel forward and backward moving device may include: a driving device including at least one of a driving motor, a hydraulic cylinder, a pneumatic cylinder, and an electric actuator; and

[0018] A control unit applies a control signal to the driving device to make the pressure applied to the plurality of pushing rollers uniform.

[0019] Furthermore, according to the present invention, the driving device may drive the driving roll and the second working roll respectively so that a first rotational linear speed of the first working roll is equal to a second rotational linear speed of the second working roll.

[0020] In addition, according to the present invention, the driving device is capable of driving the driving roller and the second working roller at the same rotational angular velocity so that the first rotational linear velocity of the first working roller is equal to the second rotational linear velocity of the second working roller, wherein the fourth radius of the driving roller is equal to the second radius of the second working roller.

[0021] In addition, according to the present invention, the first working roll may include: a rolling portion, which contacts the billet to roll the billet; a joint portion, which is formed in the rolling portion so that the rolling portion can perform joint movement along the front-rear direction; and a sliding portion, which is formed in the rolling portion so that the rolling portion can slide axially while rotating.

[0022] Furthermore, according to the present invention, the joint portion may be composed of at least any one of a hinge ball, an angular contact bearing, and a combination thereof for being provided in a shaft hole portion recessedly formed at an end portion of the rolling portion.

[0023] In addition, according to the present invention, the sliding portion may include: a sleeve, which is clearance-matched with the axial hole portion of the rolling portion; a sleeve rotating shaft, which is freely rotatably arranged on the sleeve; a guide sleeve, which is fixedly or freely rotatably formed on the assembly box body and can rotatably and slidably support the sleeve rotating shaft; and a damping device, which is arranged on the sleeve rotating shaft, for reducing vibration and noise and for resetting the sleeve rotating shaft from a sliding position when there is no load.

[0024] In addition, according to the present invention, the damping device may include: a compression spring, which is arranged on one side of the sleeve rotation axis and applies an elastic restoring force when contracted; and a tension spring, which is arranged on the other side of the sleeve rotation axis and applies an elastic restoring force when stretched.

[0025] Furthermore, according to the present invention, the sliding portion may include: at least one deep groove ball bearing formed between the sleeve and the sleeve rotating shaft; and a thrust bearing formed between the guide sleeve and the bushing cover.

[0026] In addition, according to the present invention, the first guide roller includes: a contact portion, which is formed with at least one rolling oil injection groove portion and is in contact with the first idle roller; an axis portion, one end of which is fixed to the assembly box body and the other end is inserted into a recessed portion recessedly formed at the end of the contact portion; and at least one self-aligning bearing (Self-aligning bearing) formed between the contact portion and the axis portion to align and rotate the rotation center of the contact portion.

[0027] Furthermore, according to the present invention, the rolling oil spraying groove portion may include a circumferential fine groove portion having an annular fine groove formed along the circumference of the contact portion, so that the sprayed rolling oil can pass through the rolling oil spraying groove portion and directly spray to the first working roll through the first spacing between the first idle roll and the driving roll.

[0028] In addition, in order to solve the above-mentioned technical problems, the assembly box device provided by the present invention may include: an assembly box body; a first idle roller, which is freely rotatably formed on the assembly box body and formed in front of or behind the first working roller to support the first working roller along the front-to-back direction in contact with the first working roller; a first guide roller, which is freely rotatably formed on the assembly box body and formed in front of or behind the first idle roller to support the first idle roller along the front-to-back direction or the circumferential direction of the driving roller in contact with the first idle roller; and a plurality of push roll units (Push Roll unit), which are formed on a push bar (Push bar) provided in front of or behind the assembly box body and are arranged at a certain interval to support at least any one of the first working roller, the first idle roller, and the first guide roller along the front-to-back direction or the circumferential direction of the driving roller.

[0029] Effects of the Invention

[0030] According to the various embodiments of the present invention implemented as described above, by using the assembly and matching device capable of supporting the first working roll in the front-rear direction, the reaction force in the front-rear direction can be firmly counteracted, the deformation of the first working roll in the front-rear direction can be minimized, and even if the first working roll is deformed, it can be actively responded to and aligned and restored to the normal position, thereby increasing the strength and durability of the component, preventing the occurrence of adverse phenomena, and enabling the shape of the plate to be generated to be accurately controlled. Of course, the scope of the present invention is not limited to the above effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a stereoscopic view of an asymmetric rolling device according to some embodiments of the present invention.

[0032] Figure 2 yes Figure 1 A three-dimensional view of the assembly box device of the asymmetric rolling device.

[0033] Figure 3 yes Figure 2 A top view of the assembly box device of the asymmetric rolling device.

[0034] Figure 4 yes Figure 3 A cross-sectional view of the assembly box device of the asymmetric rolling device.

[0035] Figure 5 yes Figure 1 Side cross-sectional view of an asymmetric rolling device.

[0036] Figure 6 yes Figure 5 An enlarged side cross-sectional view of an asymmetric rolling device.

[0037] Figure 7 yes Figure 1 Cross-sectional view of the first working roll of the asymmetric rolling device.

[0038] Figure 8 yes Figure 7 Partially enlarged cross-sectional view of the first working roll of an asymmetric rolling device.

[0039] Fig. 9 yes Figure 1 Cross-sectional view of the first idle roller of an asymmetric rolling device.

[0040] Fig.10 yes Figure 1 Cross-sectional view of the first guide roller of the asymmetric rolling device.

[0041] Fig.11 The diagram is Fig.10 A cross-sectional view of a state in which the rolling oil injection groove of an asymmetric rolling device directly injects rolling oil onto the first working roll.

[0042] Fig.12 It is a graphic Figure 1 A cross-sectional view of another example of the rolling oil injection groove portion of the asymmetric rolling device. DETAILED DESCRIPTION

[0043] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0044] The embodiments of the present invention are used to more completely explain the present invention to those skilled in the art to which the present invention belongs. The following embodiments can be transformed into a variety of other forms, and the scope of the present invention is not limited to the following embodiments. These embodiments can make the present disclosure more complete and convey the spirit of the present invention to those skilled in the art to which the present invention belongs more completely. In addition, the thickness or size of each layer in the following figures is exaggerated for ease of explanation and clear description.

[0045] The terms used in this specification are used to explain specific embodiments, rather than to limit the inventive concept. Therefore, unless otherwise clearly specified in the context, the singular expressions in this specification include plural expressions. Moreover, terms such as "include" and / or "comprise" may be interpreted as indicating specific features, numbers, steps, operations, constituent elements, or combinations thereof, but may not be interpreted as excluding the existence or additional possibility of one or more other features, numbers, steps, operations, constituent elements, or combinations thereof.

[0046] Embodiments of the present invention are described below with reference to the accompanying drawings which schematically illustrate preferred embodiments of the present invention. It is anticipated that the shapes shown in the drawings may vary, for example, depending on manufacturing techniques and / or tolerances. Therefore, embodiments of the technical concept of the present invention should not be interpreted as being limited to the specific shapes of the regions shown in this specification, and should include, for example, shape variations caused by manufacturing.

[0047] Figure 1 is a perspective view of an asymmetric rolling device 100 according to some embodiments of the present invention.

[0048] First, if Figure 1 As shown, the asymmetric rolling device 100 according to some embodiments of the present invention may generally include: a first working roll WR1 (Work Roll), a second working roll WR2, a driving roll DR, a driving device 70 and an assembly box device 80.

[0049] For example, the first work roll WR1 may be a rolling roll that contacts the first surface 1 a , ie, the upper surface, of the panel-shaped blank 1 .

[0050] The corresponding second working roll WR2 may be a rolling roll which contacts the second surface 1 b , ie, the lower surface, of the billet 1 and has a second radius R2 greater than the first radius R1 of the first working roll WR1 , so as to perform asymmetrical rolling on the billet 1 .

[0051] In the accompanying drawings, the first working roll WR1 is located above the blank 1, and the second working roll WR2 is located below the blank 1, but it is not necessarily limited to this. The first working roll WR1 can also be located below the blank 1, and the second working roll WR2 can be located above the blank 1. In addition, the first working roll WR1 can also be located on one side of the blank 1, and the second working roll WR2 can be located on the other side of the blank 1.

[0052] Therefore, the billet 1 is rolled from the first thickness T to a thinner second thickness t while passing between the first working roll WR1 and the second working roll WR2. At this time, the radii of the two rolls used to roll the billet 1 are different, so the shear deformation forces acting on the billet 1 are different, which can make the material structure denser, thereby making the physical properties of the material better.

[0053] The physical properties of the material can be improved to different degrees depending on the type, thickness, specification, process temperature and other process environments of the blank 1. The diameters of the first working roll WR1 and the second working roll WR2 can be optimized according to the type, thickness, specification, process temperature and other process environments of the blank 1.

[0054] In addition, for example, the driving roll DR is an auxiliary roll formed above or below the first working roll WR1 to drive the first working roll WR1 in contact with the first working roll WR1 , and may be driven by the driving device 70 .

[0055] In addition, for example, the driving device 70, as a device for driving the second working roll WR2 and the driving roll DR, can drive the driving roll DR and the second working roll WR2 respectively so that the first rotational linear velocity V1 of the first working roll WR1 is equal to the second rotational linear velocity V2 of the second working roll WR2.

[0056] More specifically, for example, the driving device 70 may include a first actuator 71, a second actuator 72, and a driving control unit 73. The first actuator 71 includes a motor or a transmission device for driving the first working roll WR1; the second actuator 72 includes a motor or a transmission device for driving the second working roll WR2; and the driving control unit 73 is used to control the first actuator 71 and the second actuator 72.

[0057] In addition, although not shown in the figure, the first actuator 71 and the second actuator 72 can adopt various transmission devices other than electric motors, such as a gear combination, a belt driven pulley combination, a sprocket combination, a silk combination, a moving platform and a screw combination, etc.

[0058] In addition, for example, the assembly box device 80 is a structure that supports the first working roll WR1 in the front-to-back direction while contacting the first working roll WR1. The assembly box device 80 can not only support the first working roll WR1 in the front-to-back direction, but also can accurately control the shape of the blank 1 by accurately adjusting the reaction force supported by each part.

[0059] Figure 2 yes Figure 1 A perspective view of the assembly box device 80 of the asymmetric rolling device 100, Figure 3 yes Figure 2 A top view of the assembly box device 80 of the asymmetric rolling device 100, Figure 4 yes Figure 3 A cross-sectional view of an assembly box device 80 of an asymmetric rolling device 100, Figure 5 yes Figure 1 A side cross-sectional view of an asymmetric rolling device 100, Figure 6 yes Figure 5 An enlarged side cross-sectional view of an asymmetric rolling device 100 is shown.

[0060] More specifically, for example, Figures 1 to 6 As shown, the assembly box device 80 can be formed without interfering with the linear moving path of the blank, and includes: an assembly box body 81, a first idle roller IR1, a first guide roller GR1 and a plurality of push roller units 90 (Push Roll unit). The assembly box body 81 can support the first working roller WR1 while allowing the first working roller WR1 to rotate freely; the first idle roller IR1 is freely rotatably formed on the assembly box body 81, and is formed in front of or behind the first working roller WR1 to support the first working roller WR1 along the front-to-back direction in contact with the first working roller WR1; the first guide roller GR1 is freely rotatably formed on the assembly box body 81, and is formed in front of or behind the first idle roller IR1 to support the first idle roller IR1 along the front-to-back direction or the circumferential direction of the driving roller DR in contact with the first idle roller IR1; and a plurality of push roller units 90 (Push Roll unit) are formed on the push bar 82 (Push bar) provided on the front or back of the assembly box body 81, and are arranged at a certain interval to support at least any one of the first working roller WR1, the first idle roller IR1, and the first guide roller GR1 along the front-to-back direction or the circumferential direction of the driving roller DR.

[0061] The assembly box body 81, as a structure having the strength and durability to fully bear the component load and rolling load, can be a combination or an integral injection-molded structure assembled from vertical components, horizontal components, panel components, etc. in various forms and quantities.

[0062] However, the shape and structure of the assembly box body 81 are not necessarily limited to those shown in the drawings, and various forms of assembly box frame structures for bearing component loads and rolling loads are applicable.

[0063] In addition, for example, the first idle roller IR1 may include: a 1-1 idle roller IR1-1 and a 1-2 idle roller IR1-2. The 1-1 idle roller IR1-1 is formed in front of the first working roller WR1, and the second height H2 of the second center axis C2 is equal to the first height H1 of the first center axis C1 of the first working roller WR1; the 1-2 idle roller IR1-2 is formed behind the first working roller WR1, and the third height H3 of the third center axis C3 is equal to the first height H1 of the first center axis C1 of the first working roller WR1.

[0064] In addition, for example, the first guide roller GR1 may include: a 1-1 guide roller GR1-1 and a 1-2 guide roller GR1-2. The 1-1 guide roller GR1-1 is formed in front of the first working roller WR1, and the fourth height H4 of the fourth center axis C4 is greater than the first height H1 of the first center axis C1 of the first working roller WR1; the 1-2 guide roller GR1-2 is formed behind the first working roller WR1, and the fifth height H5 of the fifth center axis C5 is greater than the first height H1 of the first center axis C1 of the first working roller WR1.

[0065] In addition, for example, the push roller unit 90 may include at least one push roller 93, a movable plate 92, and a movable plate forward and backward moving device. At least one push roller 93 contacts at least any one of the first working roller WR1, the first idle roller IR1, and the first guide roller GR1; the movable plate 92 supports the push roller 93 while allowing the push roller 93 to rotate freely; the movable plate forward and backward moving device is provided on the push rod 82 and is used to drive the movable plate 92 to move forward and backward.

[0066] The movable plate forward and backward moving device may include an adjustment screw 91 rotatably formed on the push rod 82. However, the present invention is not limited thereto, and various forms of forward and backward moving devices that can be stretched and contracted are applicable.

[0067] That is, the movable plate forward and backward moving device may include a driving device and a control unit 95. The driving device includes at least one of a driving motor 94, a hydraulic cylinder, a pneumatic cylinder, and an electric actuator for rotating the adjustment screw 91; the control unit 95 applies a control signal to the driving device to make the pressure applied to the plurality of pushing rollers 93 uniform.

[0068] Among them, two pushing rollers 83 can be provided at the upper and lower parts of the movable plate 92, so that the movable plate 92 can stably apply pressure to the first guide roller GR1 when applying pressure along the front and rear directions. The movable plate 92 can be provided with a joint part (not shown) so that the pressure can be evenly distributed to the pushing roller 83.

[0069] Therefore, for example, when the operator manually adjusts the adjustment screws 91 corresponding to the plurality of push roller units 90 to rotate the screws, the movable plate 92 can move forward based on the adjustment screws 91, and the corresponding push rollers 93 move forward while applying pressure to a specific portion of the first guide roller GR1 in the forward and rearward directions, and also to a specific portion of the first idle roller IR1 and a specific portion of the first working roller WR1, so that precise adjustment can be made so that the X-axis reaction force of the first working roller WR1 remains uniform as a whole. Thus, by accurately adjusting such an X-axis reaction force, the rolling load acting on the billet 1 can be accurately adjusted, so that a high-quality product can be produced.

[0070] In addition, if Figure 3 As shown, the pushing roller unit 90 may further include a driving motor 94 and a control unit 95. The driving motor 94 is used to drive the adjusting screw 91 to rotate; the control unit 95 applies a control signal to the driving motor 94 to make the pressure applied to the plurality of pushing rollers 93 uniform.

[0071] Therefore, the adjustment screw 91 can be automatically rotated by the drive motor 94 to replace the operator's manual screw rotation, and the control unit 95 can be used to perform an automated rolling process. The control unit 95 is based on a sensor that senses the shape of the billet 1 or implements optimization programming based on various specifications of the billet 1 or rolling environments.

[0072] The present invention is not limited to the adjustment screw 91 and the drive motor 94. As mentioned above, various hydraulic cylinders, pneumatic cylinders, electric actuators, etc. are applicable.

[0073] In addition, if Figure 6As shown, the first actuator 71 and the second actuator 72 can make the first rotational linear velocity V1 of the first working roll WR1 equal to the second rotational linear velocity V2 of the second working roll WR2 by respectively controlling the rotational angular velocity of the first working roll WR1 and the second working roll WR2.

[0074] In addition, the driving device 70 can also drive the driving roller DR and the second working roller WR2 in the same or opposite directions and at the same rotational angular velocity, so that the first rotational linear velocity V1 of the first working roller WR1 is equal to the second rotational linear velocity V2 of the second working roller WR2, wherein the fourth radius R4 of the driving roller DR is equal to the second radius R2 of the second working roller WR2.

[0075] Here, the meaning of "same" refers not only to being completely the same, but also to being actually the same, including that although the operator controls the signal of the control unit to make the angular velocities of the two rolls the same, the errors that inevitably exist in the characteristics of the mechanical device lead to the sameness within the process allowable range. The "same" of the rotational linear velocities of the first working roll WR1 and the second working roll WR2 also applies to the following.

[0076] However, in another embodiment of the present invention, the first rotational linear speed V1 of the first working roll WR1 and the second rotational linear speed V2 of the second working roll WR2 may be different due to various reasons. For example, in order to artificially retain the difference in shear deformation rate in the up-down direction of the blank 1, or to control the bending of the blank 1, the first rotational linear speed V1 and the second rotational linear speed V2 are controlled to have a slight difference, for example, within a range of 10%.

[0077] More specifically, for example, Figure 6 As shown, for example, the first idle roll IR1 may be an auxiliary roll formed in front of or behind the first working roll WR1 to support the first working roll WR1 in the front-rear direction in contact with the first working roll WR1.

[0078] The first idle roller IR1 may be a rolling roller which is spaced apart from the driving roller DR by a first distance D1 and has a third radius R3 which is smaller than the first radius R1 of the first working roller WR1 to avoid interfering with the rolling path of the billet 1 .

[0079] More specifically, for example, the first idle roller IR1 may include a 1-1 idle roller IR1-1 and a 1-2 idle roller IR1-2. The 1-1 idle roller IR1-1 may be formed in front of the first working roller WR1, and the second height H2 of the second center axis C2 is equal to the first height H1 of the first center axis C1 of the first working roller WR1; the 1-2 idle roller IR1-2 may be formed behind the first working roller WR1, and the third height H3 of the third center axis C3 is equal to the first height H1 of the first center axis C1 of the first working roller WR1.

[0080] Therefore, the 1-1 idle roll IR1-1 and the 1-2 idle roll IR1-2 can more firmly and rotatably support the first work roll WR1 from the front-rear direction, that is, in front of the first work roll WR1 and behind the first work roll WR1.

[0081] Furthermore, for example, the first guide roller GR1 may be an auxiliary roller formed in front of or behind the first idle roller IR1 to support the first idle roller IR1 in the front-rear direction or the circumferential direction of the driving roller DR in contact with the first idle roller IR1.

[0082] Thus, the first guide roller GR1 may be a rolling roller having a fifth radius R5 greater than the first radius R1 of the first working roller WR1 or the third radius R3 of the first idle roller IR1 so as to contact the driving roller DR without interfering with the rolling path of the billet 1 to obtain a stronger rotational support force.

[0083] More specifically, for example, the first guide roller GR1 may include a 1-1 guide roller GR1-1 and a 1-2 guide roller GR1-2. The 1-1 guide roller GR1-1 is formed in front of the first working roller WR1, and the fourth height H4 of the fourth center axis C4 is greater than the first height H1 of the first center axis C1 of the first working roller WR1; the 1-2 guide roller GR1-2 is formed behind the first working roller WR1, and the fifth height H5 of the fifth center axis C5 is greater than the first height H1 of the first center axis C1 of the first working roller WR1.

[0084] Therefore, the 1-1 guide roller GR1-1 and the 1-2 guide roller GR1-2 can further support the first work roller WR1 and the first idle roller IR1 more firmly and rotatably from the front-rear direction, that is, in front of the first work roller WR1 and behind the first work roller WR1.

[0085] Therefore, according to the present invention, the first idle roller IR1, the first guide roller GR1 and the push roller unit of the assembly device 80 capable of supporting the first working roller WR1 from the front-to-back direction are used to support the first working roller WR1 in a triangular arrangement that contacts each other, so that the reaction force in the front-to-back direction can be firmly counteracted and the deformation of the first working roller WR1 in the front-to-back direction can be minimized. Therefore, the strength and durability of the components can be increased and adverse phenomena can be prevented, so that the shape of the plate to be generated can be accurately controlled.

[0086] Figure 7 yes Figure 1 A cross-sectional view of the first working roll WR1 of the asymmetric rolling device 100, Figure 8 yes Figure 7 A partially enlarged cross-sectional view of the first working roll WR1 of the asymmetric rolling device 100.

[0087] like Figures 1 to 8 As shown, the first working roll WR1 of the asymmetric rolling device 100 according to an embodiment of the present invention may include: a rolling section 10, which contacts the billet 1 to roll the billet 1; a joint section 20, which is formed in the rolling section 10, so that the rolling section 10 can perform joint movement along the front and rear directions; and a sliding section 30, which is formed in the rolling section 10, so that the rolling section 10 can rotate and slide axially.

[0088] For example, the rolling section 10 of the first work roll WR1 may be a portion that contacts the first surface 1 a of the billet 1 and has a cylindrical shape as a whole.

[0089] In addition, for example, Figure 7 As shown, the joint portion 20 of the first working roll WR1 is formed between the rolling portion 10 and the sliding portion 30. Figure 8 As shown, the rolling section 10 can be composed of at least any one of a hinge ball 21, an angular contact bearing 22 (Angular contact bearing) and a combination thereof, which are used to be set in the shaft hole portion 10a, so that the rolling section 10 can achieve joint movement, and the shaft hole portion 10a is recessed at the end of the rolling section 10.

[0090] Among them, Figure 8 As shown in the enlarged part on the right side, the hinge ball 21 can adopt a steel ball bearing (Steel Ball Bearing) inserted into the shaft hole portion 10. In order to bear the thrust load, the angular contact bearing 22 can adopt an angular contact ball bearing or an angular contact roller bearing, which is formed by an inner wheel 221 with a convex shape on one side, an outer wheel 222 with a convex shape on the other side, and a ball 223 or a roller arranged between them.

[0091] However, the connection beam 21 and the angular contact bearing 22 are not limited to those shown in the drawings, and various types of bearings that are rotatable and can withstand rolling load and thrust load may be used.

[0092] In addition, for example, Figure 8 As shown, the sliding portion 30 of the first working roll WR1 may include: a sleeve 31, which is clearance-matched with the axial hole portion 10a of the rolling section 10; a sleeve rotating shaft 32, which is freely rotatably arranged on the sleeve 31; a guide sleeve 33, which is fixed or freely rotatably formed on the assembly box body 81, and rotatably and slidably supports the sleeve rotating shaft 32; and a damping device 34, which is arranged on the sleeve rotating shaft 32, and is used to reduce vibration and noise while resetting the sleeve rotating shaft 32 from the sliding position when there is no load.

[0093] More specifically, for example, the damping device 34 includes a compression spring 35 and a tension spring 36. The compression spring 35 is disposed on one side of the sleeve rotating shaft 32 and applies an elastic restoring force when contracted; the tension spring 36 is disposed on the other side of the sleeve rotating shaft 32 and applies an elastic restoring force when stretched.

[0094] Therefore, the sleeve 31 is independent of the rolling section 10 and is freely rotatably arranged. The sleeve rotating shaft 32 can rotate and slide based on the guide sleeve 33, and can slide and rotate along the axial direction while performing the joint movement of the joint section 20 described above. By using the damping device 34, the sleeve rotating shaft 32 can be reset from the sliding position when there is no load.

[0095] Among them, the sleeve 31, the sleeve rotating shaft 32, the guide sleeve 33 and the damping device 34 are respectively arranged at the left and right ends of the rolling section 10. If the rolling section 10 slides to the left, a restoring force is applied to the right direction. If the rolling section 10 slides to the right, a restoring force is applied to the left direction, so that it can be reset from the sliding position.

[0096] Therefore, the damping device 34 plays a damping role in repeated contraction and extension, can counteract the thrust load, and can prevent the bearing from being damaged by reducing the bearing load concentrated on the bearing.

[0097] In addition, if Figure 8 As shown, the sliding portion 30 of the first working roll WR1 may further include at least one deep groove ball bearing 37 and a thrust bearing 38. At least one deep groove ball bearing 37 is formed between the sleeve 31 and the sleeve rotating shaft 32; and the thrust bearing 38 is formed between the guide sleeve 33 and the bushing cover BC.

[0098] More specifically, for example, Figure 8 As shown in the middle enlarged part, the deep groove ball bearing 37 is a bearing composed of an inner wheel 371 formed with grooves, an outer wheel 372 formed with grooves and balls 373 inserted between the grooves. When a rolling load occurs, the friction force generated between the sleeve 31 and the sleeve rotating shaft 32 can be minimized.

[0099] In addition, for example, Figure 8 As shown in the enlarged portion on the left side of the drawing, the thrust bearing 38 is a bearing composed of a fixed wheel 381 provided on the bushing cover BC, a rotating wheel 382 provided on the guide sleeve 33 side, and a ball 383 provided therebetween. When a rotating load occurs, if the guide sleeve 33 also rotates together, the friction force generated between the guide sleeve 33 and the fixed bushing cover BC can be minimized.

[0100] However, the deep groove ball bearing 37 and the thrust bearing 38 are not necessarily limited to the drawings, and various types of bearings that are rotatable and can withstand rolling load and thrust load may be used.

[0101] Therefore, by utilizing the various forms of the joint parts 20 and the sliding parts 30 appropriately arranged on each part, the joint movement, rotational movement and axial sliding of the rolling section 10 can be realized. Therefore, even if the first working roll WR1 is severely deformed due to the strong rolling load, it can be actively dealt with, aligned and restored to the normal position. Therefore, the strength and durability of the components can be increased, and adverse phenomena can be prevented, so that the shape of the plate to be generated can be accurately controlled.

[0102] Fig. 9 yes Figure 1 sectional view of the first idle roller IR1 of the asymmetric rolling device 100.

[0103] like Fig. 9 As shown, the first idle roll IR1 of the asymmetric rolling device 100 according to an embodiment of the present invention may include an idle portion IRa in contact with the first working roll WR1; a tip portion IRb for alleviating stress concentration at the corners and with a radius gradually decreasing from the idle portion IRa; a cover portion CP arranged on the rotating shaft for fixing the shaft position and preventing the bearing from disengaging; and a deep groove ball bearing 39 arranged on the rotating shaft.

[0104] like Fig. 9 As shown, according to the stress concentration phenomenon, different numbers of the deep groove ball bearings 39 can be arranged on the left and right sides, for example, 3 on the left side and 4 on the right side.

[0105] Fig. 9 The deep groove ball bearing 39 and Figure 8The deep groove ball bearing 37 may have the same structure and perform the same function, so the detailed description thereof is omitted.

[0106] Fig.10 yes Figure 1 A cross-sectional view of the first guide roller GR1 of the asymmetric rolling device 100, Fig.11 is through Fig.10 A cross-sectional view showing a state in which the rolling oil injection groove portion 41 of the asymmetric rolling device 100 directly injects the rolling oil 2 onto the first work roll WR1.

[0107] like Fig.10 and Fig.11 As shown, the first guide roller GR1 of the asymmetric rolling device 100 according to an embodiment of the present invention may include: a contact portion 40, which is formed with at least one rolling oil injection groove portion 41 and is in contact with the first idle roller IR1; an axis portion 50, one end of which is fixed to the assembly box body 81, and the other end is inserted into a recessed portion 40a recessedly formed at the end of the contact portion 40; and at least one self-aligning bearing 60 (Self-aligning bearing) formed between the contact portion 40 and the axis portion 50 so that the rotation center of the contact portion 40 can be aligned and rotated.

[0108] The self-aligning bearing 60 may be a structure in which the inner wheel swings with the outer wheel as a reference, and in order to be able to return to the original position when swinging, a double ball or roller structure is further tilted.

[0109] However, the self-aligning bearing 60 is not necessarily limited thereto, and various types of bearings that can rotate and withstand a swing load can be used.

[0110] More specifically, for example, the rolling oil injection groove portion 41 may include a circumferential fine groove portion, which is formed with annular fine grooves along the circumference of the contact portion 40, so that the injected rolling oil 2 can pass through the rolling oil injection groove portion 41 and pass through the first idle roller IR1 and the driving roller DR. The first distance D1 is directly sprayed to the first working roller WR1.

[0111] Therefore, if Fig.11 As shown, the sprayed rolling oil 2 passes through the rolling oil spray groove 41 and is directly sprayed to the first working roll WR1 through the first idle roll IR1 and the driving roll DR, so that the rolling oil 2 can be smoothly provided, thereby improving heat dissipation, reducing friction, and thus greatly improving rolling performance.

[0112] Fig.12 It is a graphic Figure 1 FIG. 1 is a cross-sectional view of another example of the rolling oil blasting groove portion 41 of the asymmetric rolling device 100 .

[0113] like Fig.12 As shown, the rolling oil injection groove 41 of the first guide roller GR1 may be spiral, the contact portion 40 may be integrally formed with a tip 42 for preventing stress concentration at a corner, and the rotating shaft may be formed with a plurality of the self-aligning bearings 60 .

[0114] However, the self-aligning bearing 60 is not necessarily limited thereto, and various types of bearings that can rotate and withstand a swing load can be used.

[0115] Therefore, the billet 1 to be rolled by the asymmetric rolling apparatus 100 of the present invention may include magnesium or a magnesium alloy having a hexagonal close-packed (HCP) structure. Recently, magnesium has been studied as a next-generation lightweight component, and its density is 1.74 g / cm 3 , compared with a density of 7.90g / cm 3 of iron, with a density of 2.7 g / cm 3 Aluminum is lightweight and has excellent specific strength and specific elastic modulus. It also has excellent ability to absorb vibration, impact, electromagnetic waves, etc., and has excellent electrical and thermal conductivity. Therefore, it is suitable as a lightweight material for automobiles, aircraft, etc., and can also be used in the electronic industry such as mobile phones and laptops.

[0116] In addition, the billet 1 rolled by the asymmetric rolling device 100 of the present invention can also be rolled multiple times for the same billet 1. The purpose of such multiple rolling is to prevent problems caused by applying a very large amount of reduction by sequentially applying a suitable amount of reduction to the billet.

[0117] At this time, multiple times means that the billet 1 rolled by the working rolls WR1 and WR2 is re-introduced into the same working rolls WR1 and WR2 or the billet 1 passes through multiple groups of working rolls WR1 and WR2 so that the total rolling times of the billet 1 is more than 2 times. At this time, the process of putting the rolled billet 1 into the working rolls WR1 and WR2 may include continuous and intermittent situations.

[0118] In addition, the multiple times may include a situation where the blank 1 is physically separated from the working rolls WR1, WR2 and then reinserted, and a situation where the blank 1 is still placed between the working rolls WR1, WR2 and the rotation direction of the working rolls WR1, WR2 is changed to reverse rotation and then reinserted between the working rolls.

[0119] Therefore, with the first working roll WR1 described above as a reference, it is preferred that the first idle roll IR1 and the guide roll GR1 are arranged in front and rear, respectively.

[0120] In addition, the billet 1 rolled by the asymmetric rolling device 100 of the present invention can be applied to any material whose texture needs to be controlled, in addition to the magnesium or magnesium alloy described above. For example, the billet 1 is a metal material having a hexagonal close-packed crystal structure including titanium Ti or a titanium alloy, or a metal material including aluminum or an aluminum alloy, or a Fe-Si alloy whose crystal direction is affected by magnetism.

[0121] In addition, the present invention may include an assembly box device 80. The structure and function of the assembly box device 80 may be the same as the asymmetric rolling device 100 described above, so its detailed description is omitted.

[0122] The present invention is described with reference to the embodiments shown in the accompanying drawings, but this is only exemplary. For those with ordinary knowledge in the technical field, it should be understood that various modifications can be made based on this and implemented as another equivalent embodiment. Therefore, the true technical protection scope of the present invention should be determined based on the technical ideas of the attached claims.

Claims

1. An asymmetric rolling device, comprising: a first working roll in contact with a first side of the blank; a second working roll in contact with a second surface of the billet and having a second radius greater than the first radius of the first working roll so as to perform asymmetrical rolling on the billet; a driving roll formed above or below the first working roll to drive the first working roll in contact with the first working roll; A driving device, which is used to drive the second working roll or the driving roll; as well as A box device is assembled, which contacts the first working roll so as not to interfere with the linear moving path of the blank and supports the first working roll in the front-rear direction.

2. The asymmetric rolling device according to claim 1, wherein: The assembly box device comprises: an assembly box body, which supports the first working roll while allowing the first working roll to rotate freely; and The first idle roller is formed on the assembly box body so as to be freely rotatable and is formed in front of or behind the first working roller to support the first working roller in the front-rear direction in contact with the first working roller.

3. The asymmetric rolling device according to claim 2, wherein: The first idle roller comprises, A 1-1 idle roll, which is formed in front of the first working roll, and a second height of a second center axis is equal to a first height of a first center axis of the first working roll; as well as The 1-2 idle roll is formed behind the first working roll, and the third height of the third center axis is equal to the first height of the first center axis of the first working roll.

4. The asymmetric rolling device according to claim 2, wherein: The assembly box device further comprises: A first guide roller is rotatably formed on the assembly box body and is formed in front of or behind the first idle roller to support the first idle roller in a front-rear direction or a circumferential direction of the driving roller in contact with the first idle roller.

5. The asymmetric rolling device according to claim 4, wherein: The first guide roller comprises: A 1-1 guide roller, which is formed in front of the first working roller and has a fourth center axis with a fourth height greater than a first center axis of the first working roller; and The 1-2 guide roller is formed behind the first working roller, and the fifth height of the fifth center axis is greater than the first height of the first center axis of the first working roller.

6. The asymmetric rolling device according to claim 4, wherein: The assembly box device further comprises: A plurality of push roller units are formed on a push rod provided at the front or rear of the assembly box body and are arranged at a certain interval to support at least any one of the first working roller, the first idle roller, and the first guide roller along the front-to-back direction or the circumferential direction of the driving roller.

7. The asymmetric rolling device according to claim 6, wherein: The push roller unit comprises: At least one push roller, which contacts and rolls at least any one of the first working roller, the first idle roller, and the first guide roller; a movable plate that supports the push roller and allows the push roller to rotate freely; and The movable plate forward and backward moving device is arranged on the push rod and is used for driving the movable plate to move forward and backward.

8. The asymmetric rolling device according to claim 7, wherein: The movable plate forward and backward moving device comprises: a driving device, comprising at least one of a driving motor, a hydraulic cylinder, a pneumatic cylinder, and an electric actuator; and A control unit applies a control signal to the driving device to make the pressure applied to the plurality of pushing rollers uniform.

9. The asymmetric rolling device according to claim 1, wherein: The driving device drives the driving roller and the second working roller respectively so that a first rotational linear speed of the first working roller is equal to a second rotational linear speed of the second working roller.

10. The asymmetric rolling device according to claim 9, wherein: The driving device drives the driving roll and the second working roll at the same rotational angular velocity so that the first rotational linear velocity of the first working roll is equal to the second rotational linear velocity of the second working roll, wherein the fourth radius of the driving roll is equal to the second radius of the second working roll.

11. The asymmetric rolling device according to claim 1, wherein: The first working roll comprises: a rolling section, which contacts the billet to roll the billet; a joint portion formed at the rolling portion so as to allow the rolling portion to perform joint motion along the front-rear direction; and A sliding portion is formed on the rolling portion so that the rolling portion can slide in the axial direction while rotating.

12. The asymmetric rolling device according to claim 11, wherein: The joint portion is composed of at least any one of a hinge ball, an angular contact bearing, and a combination thereof for being arranged in a shaft hole portion, and the shaft hole portion is recessedly formed at an end portion of the rolling portion.

13. The asymmetric rolling device according to claim 12, wherein: The sliding portion comprises: A sleeve, which is clearance-matched with the shaft hole portion of the rolling portion; A sleeve rotating shaft, which is freely rotatably arranged on the sleeve; A guide sleeve, which is fixedly or freely rotatably formed on the assembly box body and rotatably and slidably supports the sleeve rotating shaft; and The damping device is arranged on the sleeve rotating shaft and is used to reduce vibration and noise and to reset the sleeve rotating shaft from a sliding position when there is no load.

14. The asymmetric rolling device according to claim 13, wherein: The damping device comprises: A compression spring, which is disposed on one side of the sleeve rotation axis and applies an elastic restoring force when contracted; and The tension spring is arranged on the other side of the sleeve rotation axis and applies elastic restoring force when stretched.

15. The asymmetric rolling device according to claim 14, wherein: The sliding portion comprises: at least one deep groove ball bearing formed between the sleeve and the sleeve rotation axis; and A thrust bearing is formed between the guide sleeve and the bushing cover.

16. The asymmetric rolling device according to claim 4, wherein: The first guide roller comprises: a contact portion formed with at least one rolling oil spraying groove portion and in contact with the first idle roller; a shaft portion, one end of which is fixed to the assembly box body and the other end of which is inserted into a recessed portion formed concavely at the end of the contact portion; and At least one self-aligning bearing is formed between the contact portion and the shaft portion to align the rotation center of the contact portion and rotate.

17. The asymmetric rolling device according to claim 16, wherein: The rolling oil injection groove portion includes a circumferential fine groove portion, which is formed with annular fine grooves along the circumference of the contact portion, so that the injected rolling oil can pass through the rolling oil injection groove portion and pass through the first idle roller and the driving roller. Directly spray to the first working roller.

18. An assembly box device, comprising: Assembling box body; A first idle roller, which is freely rotatably formed on the assembly box body and is formed in front of or behind the first working roller to support the first working roller in the front-rear direction in contact with the first working roller; A first guide roller, which is freely rotatably formed on the assembly box body and is formed in front of or behind the first idle roller to support the first idle roller in a front-to-rear direction or a circumferential direction of the driving roller in contact with the first idle roller; as well as A plurality of push roller units are formed on a push rod provided at the front or rear of the assembly box body and are arranged at a certain interval to support at least any one of the first working roller, the first idle roller, and the first guide roller along the front-to-back direction or the circumferential direction of the driving roller.

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