Core rod fixing device and high-speed rolling mill

Abstract

The invention discloses a core rod fixing device and a high-speed rolling mill, which belong to the field of pipe processing equipment. The core rod will not change its position during the pipe transmission and processing. The core rod fixing device of the invention comprises a frame, a body slidably mounted on the frame, and a clamping device arranged on the body. The frame is provided with a core rod. The pipe is transmitted along the core rod after passing through the clamping device. The clamping device comprises a clamping claw. After the pipe is transmitted out of the clamping device, the clamping claw clamps the core rod to prevent the core rod from changing its position in the axial direction. The frame is also provided with a core rod clamping device, which comprises a clamping claw and a driving member for controlling the clamping claw to clamp the core rod. The clamping claw comprises two clamping arms hinged to each other, and a clamping hoop for clamping the core rod is arranged at the end of the clamping arm. A plurality of needle bearings are arranged on the clamping hoop, which abut against the core rod when clamping the core rod.

Description

Technical Field

[0001] The invention relates to the field of pipe processing equipment, in particular to a core rod fixing device and a high-speed rolling mill. Background Art

[0002] When the pipe is rolled, the mill head usually processes and drags the pipe at the same time. The processing speed of the pipe is low. If the mill head exerts a large traction force on the pipe, the quality of the pipe will be affected during the rolling process. In order to increase the processing speed of the pipe, the transmission speed of the pipe can be increased. Usually, a core rod is set to guide the transmission of the pipe. When the equipment to increase the transmission speed of the pipe is set, it is inevitable that the core rod will be affected. Therefore, it is necessary to improve the stability of the core rod to avoid position changes of the core rod during the transmission and processing of the pipe. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and propose a core rod fixing device so that the core rod will not change position during the pipe conveying and processing process.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The core rod fixing device comprises a frame, a body slidably mounted on the frame, and a clamping device arranged on the body. The frame is provided with a core rod. The pipe is transmitted along the core rod after passing through the clamping device. The clamping device comprises a claw. After the pipe passes through the clamping device, the claw clamps the core rod to prevent the core rod from changing its position in the axial direction. The frame is also provided with a core rod clamping device, which comprises a clamping claw and a driving member for controlling the clamping claw to clamp the core rod. The clamping claw comprises two clamping arms hinged to each other, and a clamping hoop for clamping the core rod is provided at the end of the clamping arm, and a plurality of needle bearings are provided on the clamping hoop for abutting against the core rod when clamping the core rod.

[0006] Furthermore, the clamping claw comprises a clamping claw plate, a plurality of movable blocks arranged on the clamping claw plate, each movable block is provided with a fastening sleeve, and the fastening sleeves on the plurality of movable blocks can be abutted against each other to form a fastening ring for clamping the core rod.

[0007] Furthermore, the machine body is provided with an axis body and a dragging component for dragging the clamping claw to slide along the axis body, and the dragging component controls the clamping claw to slide back and forth along the axis body so that the clamping claw clamps or releases the core rod.

[0008] Furthermore, the dragging component includes an oil cylinder fixedly mounted on the machine body and located above the clamping claw, a connecting plate is hingedly mounted on the piston rod of the oil cylinder, and the connecting plate is hingedly connected to the clamping claw.

[0009] Furthermore, the driving member includes a driving cylinder, and two connecting rods are hingedly mounted on the piston rod of the driving cylinder. The two connecting rods are respectively hinged to one of the clamping arms. The core rod clamping device also includes a pad, and the two clamping arms are mounted on the pad via the same rotating shaft.

[0010] Furthermore, the core rod clamping device also includes a mounting plate and a lifting cylinder, the driving member and the clamp are mounted on the mounting plate, and the lifting cylinder is connected to the mounting plate to control the lifting and lowering of the driving member and the clamp.

[0011] A high-speed rolling mill comprises the core rod fixing device mentioned above.

[0012] Beneficial effects of the present invention:

[0013] The present invention proposes a core rod fixing device, which is used to keep the core rod stable and keep its position unchanged during the transmission and processing of pipes. During the processing, a clamping force is applied to the core rod by a clamping hoop of a clamping claw on a clamping device to fix the core rod. The shape of the clamping hoop is roughly semicircular. Two clamping hoops are used to clamp the core rod. The contact surface between the clamping hoop and the core rod is large, and the core rod can be stably fixed. During the transmission of the pipe, the core rod is clamped by the core rod clamping device to avoid axial displacement of the core rod. In addition, during the processing, the core rod clamping device also keeps the core rod clamped to avoid radial displacement of the core rod. When the core rod is clamped by the clamping claw, the needle bearing on the clamping hoop will resist the core rod to limit the displacement of the core rod, but will not limit the rotation of the core rod, thereby not affecting the transmission and processing of the pipe.

[0014] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below in conjunction with the accompanying drawings:

[0016] Figure 1 It is a structural schematic diagram of a core rod fixing device in an embodiment of the present invention;

[0017] Figure 2 It is a structural schematic diagram of a machine body in an embodiment of the present invention;

[0018] Figure 3 It is a structural schematic diagram of a core rod clamping device in an embodiment of the present invention;

[0019] Figure 4 It is a side view of the core rod clamping device in an embodiment of the present invention.

[0020] Reference numerals:

[0021] Frame 100, core rod 110;

[0022] The machine body 200, the clamping device 210, the claw 211, the claw plate 2111, the movable block 2112, the fastening sleeve 2113, the shaft body 220, the dragging component 230, the oil cylinder 231, the connecting plate 232, the through groove 233, the rotating seat 240, the rotation assisting device 250, the motor 251, the upper friction wheel 252, and the lower friction wheel 253;

[0023] The core rod clamping device 300, the clamping claw 310, the clamping arm 311, the clamping hoop 312, the needle bearing 313, the driving member 320, the driving cylinder 321, the connecting rod 322, the pad 323, the lifting cylinder 330, and the mounting plate 340;

[0024] Top delivery trolley 400;

[0025] Adjustment cylinder 500. DETAILED DESCRIPTION

[0026] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise clearly specified.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] Reference Figures 1 to 4 The embodiment of the present invention discloses a core rod fixing device, including a frame 100, a body 200 slidably mounted on the frame 100, and a clamping device 210 disposed on the body 200. The frame 100 is provided with a core rod 110. After the pipe passes through the clamping device 210, it is transmitted along the core rod 110. The clamping device 210 includes a clamping claw 211. After the pipe passes out of the clamping device 210, the clamping claw 211 clamps the core rod 110 to prevent the core rod 110 from being axially To adjust the position of the core rod 110, the frame 100 is further provided with a core rod clamping device 300, which includes a clamping jaw 310 and a driving member 320 for controlling the clamping jaw 310 to clamp the core rod 110. The clamping jaw 310 includes two clamping arms 311 hinged to each other, and a clamping hoop 312 for clamping the core rod 110 is provided at the end of the clamping arm 311. A plurality of needle bearings 313 are provided on the clamping hoop 312 for abutting against the core rod 110 when clamping the core rod 110.

[0032] The core rod 110 fixing device is used to keep the core rod 110 stable and in a constant position during the pipe conveying and processing. During the processing, the clamping force is applied to the core rod 110 by the clamping hoop 312 of the clamping claw 211 on the clamping device 210 to fix the core rod 110. The shape of the clamping hoop 312 is roughly semicircular. The core rod 110 is clamped by two clamping hoops 312. The contact surface between the clamping hoop 312 and the core rod 110 is large, so the core rod 110 can be stably fixed. The core rod 110 is clamped by the core rod clamping device 300 to prevent the core rod 110 from axial displacement. In addition, during the processing, the core rod clamping device 300 also maintains the clamping of the core rod 110 to prevent the core rod 110 from radial displacement. When the core rod 110 is clamped by the clamping jaws 310, the needle bearing 313 on the clamping hoop 312 will abut against the core rod 110 to limit the displacement of the core rod 110, but will not limit the rotation of the core rod 110, thereby not affecting the transmission and processing of the pipe.

[0033] In the above, the driving member 320 of the core rod clamping device 300 includes a driving cylinder 321, and two connecting rods 322 are hingedly installed on the piston rod of the driving cylinder 321. The two connecting rods 322 are hinged to one of the clamping arms 311 respectively. The driving cylinder 321 can push its own piston rod to extend and retract. During the extension and retraction process, the connecting rod 322 and the clamping arm 311 can be driven to move up and down. The core rod clamping device 300 also includes a pad 323, and the two clamping arms 311 are installed on the pad 323 through the same rotating shaft. Under the action of the rotating shaft, the two clamping arms 311 only rotate relative to the pad 323, and one end of the clamping hoop 312 on the clamping arm 311 is rotatably connected to the rotating shaft, so that the position of the two clamping hoops 312 in the height direction does not change much, and when clamping the core rod 110, the core rod 110 will not be driven to change its position in the vertical direction.

[0034] Specifically, the claw 211 includes a claw plate 2111 and a plurality of movable blocks 2112 arranged on the claw plate 2111. Each movable block 2112 is provided with a fastening sleeve 2113. The fastening sleeves 2113 on the plurality of movable blocks 2112 can be abutted against each other to form a fastening ring for clamping the core rod 110. The plurality of movable blocks 2112 can approach or move away from each other. The fastening sleeves 2113 can move simultaneously with the movable blocks 2112. When the plurality of fastening sleeves 2113 abut against each other, they can be spliced ​​into a fastening ring to clamp the core rod 110.

[0035] Among them, the body 200 is also provided with a shaft body 220, and the claw 211 is arranged along the shaft body 220. The body 200 is provided with a dragging component 230 for dragging the claw 211 to slide along the shaft body 220. When the claw 211 moves along the shaft body 220, the movable block 2112 will also move accordingly. As the claw 211 slides back and forth along the shaft body 220, the core rod 110 can be clamped or loosened.

[0036] The dragging component 230 includes a cylinder 231 fixedly mounted on the body 200 and located above the claw 211, a connecting plate 232 is hingedly mounted on the piston rod of the cylinder 231, the connecting plate 232 is hingedly connected to the claw 211, and a through groove 233 is provided on the body 200 for the connecting plate 232 to pass through and move; a rotating seat 240 is provided on the body 200, and the claw 211 is rotatably mounted in the rotating seat 240, the dragging component 230 is connected to the rotating seat 240 to drag the rotating seat 240 to move, so that the claw 211 moves with the rotating seat 240, and will not affect the rotation of the claw 211, under the action of the auxiliary rotation device 250, the core rod 110 can keep rotating, and after the claw 211 fixes the core rod 110, it can rotate together with the core rod 110.

[0037] Reference Figure 2 Based on the above embodiment, in another embodiment of the present invention, a rotation-assisting device 250 for rotating the core rod 110 is further provided on the machine body 200. The rotation-assisting device 250 is used to rotate the core rod 110. The core rod 110 will rotate along with the pipe when processing the pipe. The core rod 110 is relatively long. If rotational power is only provided at one end thereof, the entire core rod 110 will be subjected to a large torsional force. By providing rotational power to the other end of the core rod 110 through the rotation-assisting device 250, the torsional force on the core rod 110 can be reduced and the service life of the core rod 110 can be extended.

[0038] Specifically, the rotation-assisting device 250 includes a motor 251 arranged above the claw 211, an upper friction wheel 252 transmission-connected to the motor 251, and a lower friction wheel 253 arranged on the side of the claw 211. The lower friction wheel 253 abuts against the upper friction wheel 252. The motor 251 can control the rotation of the upper friction wheel 252. The lower friction wheel 253 can rotate in the opposite direction of the upper friction wheel 252 by abutting against the upper friction wheel 252.

[0039] Reference Figure 3 and 4 Based on the above embodiment, in another embodiment of the present invention, in order to prevent the pipe from contacting the claw 211 during movement, the claw 211 needs to move downward a certain distance after releasing the core rod 110. The core rod clamping device 300 also includes a lifting cylinder 330 that can control the lifting and lowering of the claw 211 and a mounting plate 340 for installing the driving member 320 and the clamp 310. The lifting cylinder 330 can control the lifting and lowering of the mounting plate 340 to realize the lifting and lowering of the clamp 310.

[0040] Reference Figures 1 to 4The present invention also discloses a high-speed rolling mill, which adopts the above-mentioned core rod 110 fixing device. A slidable top-feeding trolley 400 is provided on the frame 100, which is used to abut against the end of the pipe to push the pipe to move, thereby increasing the conveying speed of the pipe and realizing high-speed operation. An adjusting cylinder 500 is provided on the frame 100, and a machine body 200 is slidably mounted on the frame 100 and connected to the adjusting cylinder 500. The adjusting cylinder 500 can adjust the position of the machine body 200 on the frame 100. When the pipe needs to be moved to the core rod 110, The clamping claw 211 releases the clamping of the core rod 110 to facilitate the passage of the pipe. Then, the cylinder 500 is adjusted to push the body 200 to move, so that the core rod 110 is separated from the body 200. The top delivery trolley 400 can move to the end of the core rod 110 to push the pipe to move. The cylinder 500 is adjusted to control the body 200 to reset and clamp the core rod 110. This will not affect the movement of the top delivery trolley 400. Under the action of the core rod 110 fixing device, the position of the core rod 110 is maintained unchanged, thereby not affecting the processing of the pipe.

[0041] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A core rod fixing device, characterized in that: The machine body comprises a frame, a body slidably mounted on the frame, and a clamping device arranged on the body, wherein a core rod is arranged on the frame, and the pipe is transmitted along the core rod after passing through the clamping device, and the clamping device comprises a clamping claw, and after the pipe is transmitted out of the clamping device, the clamping claw clamps the core rod to prevent the core rod from changing its position in the axial direction, and a core rod clamping device is also arranged on the frame, and the core rod clamping device comprises a clamping claw and a driving member that controls the clamping claw to clamp the core rod, and the clamping claw comprises two clamping arms hinged to each other, and a clamping hoop for clamping the core rod is arranged at the end of the clamping arm, and a plurality of needle bearings are arranged on the clamping hoop, which abut against the core rod when clamping the core rod; a shaft body and a dragging component for dragging the clamping claw to slide along the shaft body are arranged on the machine body, and the dragging component controls the clamping claw to slide reciprocatingly along the shaft body so that the clamping claw clamps or releases the core rod; the dragging component comprises A cylinder is fixedly mounted on the machine body and located above the claw, and a connecting plate is hingedly mounted on the piston rod of the cylinder, and the connecting plate is hinged with the claw; a connecting plate is hingedly mounted on the piston rod of the cylinder, and the connecting plate is hinged with the claw, and a through groove is provided on the machine body for the connecting plate to pass through and move; a rotating seat is provided on the machine body, and the claw is rotatably mounted in the rotating seat, and a dragging component is connected to the rotating seat to drag the rotating seat to move, so that the claw moves with the rotating seat, and after the claw fixes the core rod, it can rotate with the core rod; a rotation-assisting device for rotating the core rod is also provided on the machine body, and the rotation-assisting device is used to rotate the core rod, and the core rod will rotate with the pipe when processing the pipe; the rotation-assisting device includes a motor arranged above the claw, an upper friction wheel transmission-connected to the motor, and a lower friction wheel arranged on the side of the claw, the lower friction wheel abuts against the upper friction wheel, and the lower friction wheel rotates in the opposite direction of the upper friction wheel by abutting against the upper friction wheel.

2. The core rod fixing device according to claim 1, characterized in that: The clamping claw comprises a clamping claw plate and a plurality of movable blocks arranged on the clamping claw plate. Each movable block is provided with a fastening sleeve. The fastening sleeves on the plurality of movable blocks can be abutted against each other to form a fastening ring for clamping the core rod.

3. The core rod fixing device according to claim 1, characterized in that: The driving member includes a driving cylinder, and two connecting rods are hingedly installed on the piston rod of the driving cylinder. The two connecting rods are respectively hinged to one of the clamping arms. The core rod clamping device also includes a pad, and the two clamping arms are installed on the pad via the same rotating shaft.

4. The core rod fixing device according to claim 1, characterized in that: The core rod clamping device also includes a mounting plate and a lifting cylinder, the driving member and the clamping claw are mounted on the mounting plate, and the lifting cylinder is connected to the mounting plate to control the lifting of the driving member and the clamping claw.

5. The core rod fixing device according to claim 4, characterized in that: The core rod clamping device also includes a fixing plate, a guide rail is provided on the fixing plate, a plurality of sliding blocks slidably matched with the guide rail are fixedly installed on the mounting plate, a support plate is fixedly installed on the side of the mounting plate, and the support plate is connected to the piston rod on the lifting cylinder.

6. High-speed rolling mill, characterized in that: The invention comprises a core rod fixing device as described in any one of claims 1 to 5.

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