A seamless steel pipe cold pilger mill

Abstract

A seamless steel pipe cold rolling mill, relating to the field of seamless steel pipe equipment, includes a feeder, a periodic rolling mill body, a reciprocating sliding support, and reciprocating rolling rolls. Two reciprocating sliding supports and two reciprocating rolling rolls are provided. The feeder is connected to the periodic rolling mill body, the reciprocating sliding support is connected to the periodic rolling mill body, and the reciprocating rolling rolls are connected to the reciprocating sliding support. An adaptive rough tube centering component is provided on the reciprocating sliding support. The adaptive rough tube centering component includes a support frame, a support frame, an adaptive centering assembly, and a stabilizing assembly. The support frame is fixedly connected to the outer wall of the reciprocating sliding support, and the support frame is fixedly connected to the support frame. The adaptive centering assembly is connected to the support frame and contacts the rough tube. The stabilizing assembly is connected to the periodic rolling mill body, and the stabilizing assembly is connected to the support frame. The beneficial effect is that it avoids uneven wall thickness in the rolled steel pipe caused by the rough tube's eccentricity due to jumping or offset.

Description

Technical Field

[0001] This utility model relates to the field of seamless steel pipe equipment technology, and in particular to a seamless steel pipe cold rolling mill. Background Technology

[0002] As is well known, seamless steel pipe is a long strip of steel with a hollow cross section and no seams around its perimeter. In the process of processing seamless steel pipe, in order to improve the dimensional accuracy and surface quality of the steel pipe, and to make the outer diameter, wall thickness and other dimensions of the steel pipe more precise and uniform, and the surface smoother, a periodic rolling mill is required.

[0003] Chinese patent CN222402781U describes a seamless steel pipe cold rolling mill, including a main board, a mounting plate fixedly connected to the main board, a slider installed in a groove on the mounting plate, and a cleaning brush installed on the slider. However, in actual use, the following problems still exist:

[0004] In the process of rolling a rough tube into a seamless steel pipe, the rough tube needs to be fed into the rolling zone by a feeder. Due to wear or insufficient rigidity of components such as the feed roller table and V-groove, the rough tube jumps or drifts when it moves forward. The axis of the rough tube is misaligned with the axis of the rolling hole formed by the two pressure rollers, resulting in uneven wall thickness of the formed steel pipe and affecting the accuracy of the finished seamless steel pipe.

[0005] Therefore, a seamless steel pipe cold rolling mill is proposed. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the prior art, solve the problems mentioned in the background art, and provide a seamless steel pipe cold rolling mill.

[0007] To achieve the aforementioned objective, this utility model adopts the following technical solution:

[0008] A seamless steel pipe cold rolling mill includes a feeder, a periodic rolling mill body, reciprocating sliding supports, and reciprocating rolling rolls. Two reciprocating sliding supports and two reciprocating rolling rolls are provided. The side of the feeder is connected to the side of the periodic rolling mill body. The two reciprocating sliding supports are respectively connected to both sides of the inner wall of the periodic rolling mill body. The two ends of the two reciprocating rolling rolls are respectively connected to the two reciprocating sliding supports, and the two reciprocating rolling rolls are located at the upper and lower parts of the reciprocating sliding supports, respectively. An adaptive rough tube centering component is provided on the reciprocating sliding support. The centering components include a support frame, a support frame, an adaptive centering component, and a stabilizing component. Two support frames are provided, with one end of each frame located between the reciprocating sliding support and the feeder and fixedly connected to the outer wall of the reciprocating sliding support. The other ends of each support frame are fixedly connected to both sides of the outer wall of the support frame. The fixed end of the adaptive centering component is connected to the inner wall of the support frame, and the movable end of the adaptive centering component contacts the outer wall of the rough tube. The fixed end of the stabilizing component is connected to the body of the periodic tube rolling mill, and the movable end of the stabilizing component is connected to the support frame.

[0009] At least three adaptive centering components are provided. The adaptive centering components are evenly distributed circumferentially on the inner wall of the support frame along the axis of the tube forming hole of the two reciprocating tube rolling rolls. Each adaptive centering component includes an elastic telescopic column, a roller bracket, a centering roller, and an adjusting component. The bottom end of the adjusting component is connected to the inner wall of the support frame, the top end of the adjusting component is fixedly connected to the bottom end of the elastic telescopic column, the top end of the elastic telescopic column is fixedly connected to the bottom end of the roller bracket, and the top end of the roller bracket is rotatably connected to the centering roller through a pin.

[0010] The adjusting component includes a fixed plate, a threaded rod, and an adjusting block. The top end of the fixed plate is fixedly connected to the bottom end of the elastic telescopic column, and the bottom end of the fixed plate is rotatably connected to the top end of the threaded rod. The inner wall of the support frame is provided with a threaded hole, and the bottom end of the threaded rod passes through the threaded hole of the support frame and is fixedly connected to the adjusting block. The threaded rod is threadedly connected to the support frame.

[0011] The centering roller is a "V" shaped roller.

[0012] The centering roller is provided with a shallow oil line groove, which is spirally arranged on the surface of the centering roller along the axial direction of the centering roller.

[0013] The stabilizing component includes a slide rail and a rotating column. The slide rail is fixedly connected to the inner wall of the periodic tube rolling mill body. The slide rail is provided with a sliding groove. One end of the rotating column is rotatably connected to the support frame, and the other end of the rotating column is located in the sliding groove and slidably connected to the slide rail.

[0014] The rotating column is a truncated cone shape, and the shape of the cross-section of the sliding groove corresponds to the shape of the cross-section of the rotating column.

[0015] Compared with the prior art, this utility model has the following beneficial effects: The circumferentially set adaptive centering component corrects the eccentricity of the rough tube, avoiding uneven wall thickness in the rolled steel pipe caused by the rough tube jumping or shifting, thus improving the accuracy of the rolled steel pipe; the rolling cooperation between the truncated conical rotating column and the inclined sliding groove on the slideway avoids the vibration of the periodic rolling mill body during rolling affecting the stability of the adaptive centering component, further improving the accuracy of the rolled steel pipe; the rolling centering roller and the spiral oil line shallow groove on its surface quickly and evenly form a protective oil film on the surface of the rough tube, avoiding the phenomenon of steel sticking between the reciprocating rolling roller and the rough tube due to uneven protective oil film on the steel pipe surface, thus preventing damage to the steel pipe surface and improving the quality of the rolled steel pipe; the height of the entire centering component is adjusted by rotating the adjusting block to drive the threaded rod to adapt to rough tubes of different diameters, improving the versatility of the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a frontal cross-sectional view of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the fixing frame of this utility model;

[0019] Figure 4 This utility model Figure 1 A magnified structural diagram of point A is shown below;

[0020] Figure 5 This utility model Figure 2 A magnified structural diagram of point B is shown below;

[0021] Figure 6 This utility model Figure 2 A magnified structural diagram of point C is shown;

[0022] Figure 7 This utility model Figure 3 A magnified structural diagram of point D is shown.

[0023] 1. Feeder; 2. Periodic tube rolling mill body; 3. Reciprocating sliding support; 4. Reciprocating tube rolling roll; 5. Support frame; 6. Support frame; 7. Elastic telescopic column; 8. Rotary roll support; 9. Centering rotary roll; 10. Fixed plate; 11. Threaded rod; 12. Adjusting block; 13. Oil line shallow groove; 14. Slide rail; 15. Rotating column; 16. Sliding groove; 17. Self-adaptive rough tube centering component. Detailed Implementation

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood through the specific circumstances.

[0025] Additional aspects and advantages of this invention will be further set forth in the description which follows in conjunction with the accompanying drawings, and in part will be obvious from the description or may be learned by practice of the invention.

[0026] like Figure 1-2 As shown, a seamless steel pipe cold rolling mill includes a feeder 1, a periodic rolling mill body 2, reciprocating sliding supports 3, and reciprocating rolling rolls 4. Two reciprocating sliding supports 3 and two reciprocating rolling rolls 4 are provided. The side of the feeder 1 is connected to the side of the periodic rolling mill body 2. The two reciprocating sliding supports 3 are respectively connected to both sides of the inner wall of the periodic rolling mill body 2. The two ends of the two reciprocating rolling rolls 4 are respectively connected to the two reciprocating sliding supports 3, and the two reciprocating rolling rolls 4 are located at the upper and lower parts of the reciprocating sliding supports 3, respectively. An adaptive rough tube centering component 17 is provided on the reciprocating sliding supports 3. The adaptive rough tube centering component 17 includes a support frame 5, a support frame 6, an adaptive centering component, and a stabilizing component. There are two support frames 5. One end of each support frame 5 is located between the reciprocating sliding support 3 and the feeder 1 and is fixedly connected to the outer wall of the reciprocating sliding support 3. The other ends of each support frame 5 are fixedly connected to both sides of the outer wall of the support frame 6. The fixed end of the adaptive centering component is connected to the inner wall of the support frame 6, and the movable end of the adaptive centering component is in contact with the outer wall of the rough tube. The fixed end of the stabilizing component is connected to the body 2 of the periodic tube rolling mill, and the movable end of the stabilizing component is connected to the support frame 5.

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, at least three adaptive centering components are provided. The adaptive centering components are evenly distributed circumferentially on the inner wall of the support frame 6 along the axis of the tube holes formed by the two reciprocating tube rolling rolls 4. The adaptive centering components include elastic telescopic columns 7, roller brackets 8, centering rollers 9, and adjusting components. The bottom end of the adjusting component is connected to the inner wall of the support frame 6, and the top end of the adjusting component is fixedly connected to the bottom end of the elastic telescopic column 7. The top end of the elastic telescopic column 7 is fixedly connected to the bottom end of the roller bracket 8, and the top end of the roller bracket 8 is rotatably connected to the centering roller 9 through a pin.

[0028] like Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the adjusting component includes a fixed plate 10, a threaded rod 11, and an adjusting block 12. The top end of the fixed plate 10 is fixedly connected to the bottom end of the elastic telescopic column 7, and the bottom end of the fixed plate 10 is rotatably connected to the top end of the threaded rod 11. The inner wall of the support frame 6 is provided with a threaded hole, and the bottom end of the threaded rod 11 passes through the threaded hole of the support frame 6 and is fixedly connected to the adjusting block 12. The threaded rod 11 is threadedly connected to the support frame 6.

[0029] like Figure 3 and Figure 7 As shown, the intermediate transfer roller 9 is a "V" shaped roller.

[0030] like Figure 3 and Figure 7 As shown, the centering roller 9 is provided with a shallow oil line groove 13, which is spirally arranged on the surface of the centering roller 9 along the axial direction of the centering roller 9.

[0031] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the stabilizing component includes a slide rail 14 and a rotating column 15. The slide rail 14 is fixedly connected to the inner wall of the periodic tube rolling mill body 2. A sliding groove 16 is provided in the slide rail 14. One end of the rotating column 15 is rotatably connected to the support frame 5, and the other end of the rotating column 15 is located in the sliding groove 16 and is slidably connected to the slide rail 14.

[0032] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the rotating column 15 is a truncated cone shape, and the shape of the cross-section of the sliding groove 16 corresponds to the shape of the cross-section of the rotating column 15.

[0033] The work process is as follows:

[0034] S1, when in use, start the periodic tube rolling mill body 2, the raw tube is fed into the rolling hole formed by two reciprocating tube rolling rolls 4 by the feeder 1, the reciprocating sliding support 3, the reciprocating tube rolling rolls 4 and the adaptive raw tube centering component 17 slide back and forth synchronously, and at the same time the reciprocating tube rolling rolls 4 rotate back and forth to roll the raw tube.

[0035] S2, when the rough tube enters the rolling hole, it needs to pass through the support frame 6. At this time, the "V"-shaped centering rollers 9 of the circumferentially distributed adaptive centering components are attached to the surface of the rough tube. The elastic force generated by the compression of the elastic telescopic column 7 on the centering roller 9 provides support force to the axis of the rolling hole, ensuring that the rough tube is coaxial with the rolling hole. When the rough tube is eccentric, it pushes the centering roller 9 in the eccentric direction and compresses the elastic telescopic column 7 in that direction. The increased elastic force of the elastic telescopic column 7 generates a reaction force that is applied to the rough tube through the roller bracket 8 and the centering roller 9, correcting the rough tube back to the center line. This avoids uneven wall thickness of the rolled steel tube caused by the rough tube jumping or offset, thus improving the accuracy of the rolled steel tube.

[0036] S3, during the rolling of the rough tube, the reciprocating sliding support 3 drives the support frame 5 to slide synchronously. The support frame 5 drives the rotating column 15 to roll in the sliding groove 16 within the slide rail 14. Since the rotating column 15 is a truncated cone, the surface of the rotating column 15 in contact with the slide rail 14 is an inclined surface. Through the two rotating columns 15, a support force is provided vertically to the support frame 5 and the support frame 6, and two opposite reaction forces are provided horizontally. When the support frame 5 slides, a gapless rolling fit is achieved, which further stabilizes the adaptive centering component and improves the stability of the adaptive centering component and the reciprocating rolling roll 4. This avoids the vibration generated by the periodic rolling mill body 2 during the rolling process from affecting the stability of the adaptive centering component, and further improves the accuracy of the rolled steel pipe.

[0037] S4, during the rolling process of the rough tube, when the oil is sprayed onto the rough tube, the reciprocating sliding support 3 drives the support frame 5, support frame 6 and adaptive centering component to slide synchronously. At this time, the centering roller 9 rolls along the surface of the rough tube. The rolling centering roller 9 and the spiral oil line shallow groove 13 set on its surface quickly and evenly form a protective oil film on the surface of the rough tube with the sprayed oil. This avoids the phenomenon of steel sticking between the reciprocating rolling roller 4 and the rough tube due to uneven protective oil film on the surface of the steel tube, which would cause damage to the surface of the steel tube and improve the quality of the rolled steel tube.

[0038] S5, when changing the specifications of the rough tube, rotate the adjusting block 12. The adjusting block 12 drives the threaded rod 11 to rotate. Since the threaded rod 11 is threadedly connected to the threaded hole on the support frame 6, it drives the fixed plate 10, which is rotatably connected to the threaded rod 11, to rise or fall. The fixed plate 10 drives the elastic telescopic column 7 and the entire centering assembly to rise and fall as a whole, thereby adjusting the initial position of the centering roller 9 to adapt to rough tubes of different diameters.

[0039] In the rolling process of the rough tube, the spraying of oil and the reciprocating motion of the reciprocating sliding support 3 and the reciprocating rolling roll 4 to roll the rough tube are all existing technologies, so they are not described in detail in the instruction manual.

[0040] The parts of this utility model not described in detail are prior art. Although this utility model has been specifically shown and introduced in conjunction with preferred embodiments, there are many methods and approaches to implement this technical solution. The above description is only a preferred embodiment of this utility model. However, those skilled in the art should understand that various changes in form and detail can be made to this utility model without departing from the spirit and scope of this utility model as defined by the appended claims, and all such changes shall be within the protection scope of this utility model.

Claims

1. A seamless steel pipe cold rolling mill, comprising a feeder (1), a periodic rolling mill body (2), a reciprocating sliding support (3), and reciprocating rolling rolls (4), wherein two reciprocating sliding supports (3) and two reciprocating rolling rolls (4) are provided, the side of the feeder (1) is connected to the side of the periodic rolling mill body (2), the two reciprocating sliding supports (3) are respectively connected to the two sides of the inner wall of the periodic rolling mill body (2), the two ends of the two reciprocating rolling rolls (4) are respectively connected to the two reciprocating sliding supports (3), and the two reciprocating rolling rolls (4) are respectively located at the upper and lower parts of the reciprocating sliding supports (3), characterized in that: The reciprocating sliding support (3) is provided with an adaptive rough tube centering component (17). The adaptive rough tube centering component (17) includes a support frame (5), a support frame (6), an adaptive centering component, and a stabilizing component. There are two support frames (5). One end of the two support frames (5) is located between the reciprocating sliding support (3) and the feeder (1) and is fixedly connected to the outer wall of the reciprocating sliding support (3). The other ends of the two support frames (5) are respectively fixedly connected to both sides of the outer wall of the support frame (6). The fixed end of the adaptive centering component is connected to the inner wall of the support frame (6). The movable end of the adaptive centering component is in contact with the outer wall of the rough tube. The fixed end of the stabilizing component is connected to the body (2) of the periodic tube rolling mill. The movable end of the stabilizing component is connected to the support frame (5).

2. A seamless steel tube cold pilger mill according to claim 1, characterized in that: At least three adaptive centering components are provided. The adaptive centering components are evenly distributed circumferentially on the inner wall of the support frame (6) along the axis of the tube holes formed by the two reciprocating tube rolling rolls (4). The adaptive centering components include an elastic telescopic column (7), a roller bracket (8), a centering roller (9), and an adjusting component. The bottom end of the adjusting component is connected to the inner wall of the support frame (6), the top end of the adjusting component is fixedly connected to the bottom end of the elastic telescopic column (7), the top end of the elastic telescopic column (7) is fixedly connected to the bottom end of the roller bracket (8), and the top end of the roller bracket (8) is rotatably connected to the centering roller (9) through a pin.

3. A seamless steel tube cold pilger mill according to claim 2, characterized in that: The adjusting component includes a fixed plate (10), a threaded rod (11), and an adjusting block (12). The top end of the fixed plate (10) is fixedly connected to the bottom end of the elastic telescopic column (7), and the bottom end of the fixed plate (10) is rotatably connected to the top end of the threaded rod (11). The inner wall of the support frame (6) is provided with a threaded hole. The bottom end of the threaded rod (11) passes through the threaded hole of the support frame (6) and is fixedly connected to the adjusting block (12). The threaded rod (11) is threadedly connected to the support frame (6).

4. A seamless steel tube cold pilger mill according to claim 2, characterized in that: The centering roller (9) is a "V" shaped roller.

5. A seamless steel tube cold pilger mill according to claim 2, characterized in that: The centering roller (9) is provided with a shallow oil line groove (13), which is spirally arranged on the surface of the centering roller (9) along the axial direction of the centering roller (9).

6. A seamless steel tube cold pilger mill according to claim 2, characterized in that: The stabilizing component includes a slide rail (14) and a rotating column (15). The slide rail (14) is fixedly connected to the inner wall of the periodic tube rolling mill body (2). A sliding groove (16) is provided in the slide rail (14). One end of the rotating column (15) is rotatably connected to the support frame (5), and the other end of the rotating column (15) is located in the sliding groove (16) and slidably connected to the slide rail (14).

7. A seamless steel tube cold pilger mill according to claim 6, characterized in that: The rotating column (15) is a truncated cone, and the shape of the cross-section of the sliding groove (16) corresponds to the shape of the cross-section of the rotating column (15).

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