Clamping device for hot rolling of steel pipes

Abstract

This utility model discloses a clamping device for hot rolling piercing of steel pipes, relating to the field of clamping devices. It includes a processing table with a pre-reserved slot for placing steel pipes inside. Side plates are fixedly installed on both sides of the processing table, and slide rails are provided inside the side plates. A sliding cover plate is slidably connected inside the slide rails. Connecting plates are fixedly connected to both sides of the sliding cover plate, and the connecting plates are fixedly connected to the two ends of an arc-shaped frame. This utility model uses the descent of the sliding cover plate to drive the arc-shaped frame downwards, thereby causing the roller to descend and contact the steel pipe to be processed, limiting its movement and facilitating subsequent piercing. Simultaneously, when the roller wears out after prolonged use and needs replacement, rotating the threaded rod causes the square rod threadedly connected to the threaded rod to move inside the square groove. This moves the clamping rod, fixedly connected to the front end of the square rod via the connecting rod, towards the cylindrical groove, thus moving the clamping rod away from the clamping groove and enabling the disassembly and assembly of the roller.

Description

Technical Field

[0001] This utility model relates to the field of clamping devices, specifically to a clamping device for hot rolling piercing of steel pipes. Background Technology

[0002] Hot rolling piercing is the first process in the deformation of hot-rolled seamless steel pipes. Its function is to pierce solid billets into hollow tubes. Hot rolling piercing plays a crucial role in the production process of seamless steel pipes. It can not only turn solid billets into hollow tubes, but also improve the mechanical properties of steel, eliminate internal defects, and form specific shapes and sizes to meet the needs of different fields. When the billet comes into contact with the rotating rolls, friction is generated between the rolls and the metal. It is this friction that enables the rolls to drive the round billet and the tube to rotate in opposite directions.

[0003] The existing steel pipe hot rolling piercing process requires the steel pipe to be processed to ensure piercing efficiency. However, the existing clamping device still has the following problems: the existing clamping device is too rigid in clamping the steel pipe. The steel pipe will rotate during piercing. If the clamping of the steel pipe is too rigid, the rotation of the steel pipe will be affected, which may affect the final piercing effect.

[0004] Therefore, it is necessary to invent a clamping device for hot rolling piercing of steel pipes to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide a clamping device for hot rolling piercing of steel pipes, so as to solve the problem that the existing clamping devices mentioned in the background art are too rigid in clamping the steel pipes. It is common sense that the steel pipes will rotate during piercing. If the clamping of the steel pipes is too rigid, the rotation of the steel pipes will be affected, which may affect the final piercing effect.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a clamping device for hot rolling piercing of steel pipes, including a processing table, the processing table having a reserved placement groove for steel pipes inside, side plates fixedly installed on both sides of the processing table, and a slide rail provided inside the side plate, with a sliding cover plate slidably connected inside the slide rail, connecting plates fixedly connected on both sides of the sliding cover plate, and the connecting plates fixedly connected to the two ends of an arc-shaped frame, with rollers rotatably installed inside the arc-shaped frame through an installation assembly, and the rollers contacting the steel pipe to be processed inside the placement groove.

[0007] Preferably, there are three rollers, and the three rollers are rotatably connected to the arc-shaped frame at equal angles. The outer walls of the three rollers are in contact with the outer wall of the steel pipe, while the arc-shaped frame is not in contact with the steel pipe. In this way, when the rollers come into contact with the rotating steel pipe to be processed, the rotation of the steel pipe is not affected, and the steel pipe is also limited to facilitate piercing.

[0008] Preferably, the mounting assembly includes a notch pre-reserved inside the roller, and a threaded rod is rotatably connected inside the notch. The threaded rod is threadedly connected to a threaded groove pre-reserved inside the roller, which facilitates the installation and removal of the roller by rotating the threaded rod.

[0009] Preferably, the outer ring of the threaded rod has two pre-reserved threads with different directions, and the two threads are threadedly connected to two pre-reserved thread grooves inside the roller.

[0010] A dial wheel is fixedly installed on the outer wall of the smooth outer surface of the threaded rod, and the dial wheel is rotatably connected to the inside of the notch, making it convenient to rotate the threaded rod.

[0011] Preferably, the mounting assembly further includes a square rod threaded to both ends of the threaded rod, and a connecting rod is fixedly connected to the end of the square rod. A snap-fit ​​rod is fixedly installed at the end of the connecting rod. The snap-fit ​​rod matches the snap-fit ​​groove reserved at the end of the arc frame. The rotation of the threaded rod causes the square rod threaded to move linearly inside the square groove, which in turn drives the snap-fit ​​rod fixedly connected to the square rod through the connecting rod to move, thereby realizing the assembly and disassembly of the roller and the arc frame.

[0012] Preferably, the square rod, connecting rod, and snap-fit ​​rod slide inside the square groove, through hole, and columnar groove pre-reserved inside the roller, respectively, and the three grooves (square groove, through hole, and columnar groove) are connected to each other to ensure smooth movement of the square rod, connecting rod, and snap-fit ​​rod.

[0013] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0014] This invention uses a sliding cover plate to lower an arc-shaped frame, which in turn lowers the roller to contact the steel pipe to be processed and limits its movement, facilitating subsequent piercing of the steel pipe. When the roller wears out after long-term use and needs to be replaced, rotating the threaded rod causes the square rod, which is threaded to the threaded rod, to move inside the square groove. This causes the snap-fit ​​rod, which is fixedly connected to the front end of the square rod via a connecting rod, to move into the columnar groove. In this way, the snap-fit ​​rod moves away from the snap-fit ​​groove, enabling the disassembly and assembly of the roller. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1 This is a three-dimensional view of the overall structure of this utility model;

[0017] Figure 2 This is a perspective view of the arc-shaped frame and roller mounting structure of this utility model.

[0018] Figure 3 This is a three-dimensional view of the internal structure of the roller of this utility model (partially cut out).

[0019] Figure 4 This is an exploded view of the internal structure of the roller of this utility model (partially cut out).

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Processing table; 2. Placement slot; 3. Side plate; 4. Sliding cover plate; 5. Connecting plate; 6. Arc frame; 7. Roller; 8. Mounting assembly; 801. Notch; 802. Threaded rod; 803. Threaded groove; 804. Square rod; 805. Square groove; 806. Connecting rod; 807. Through hole; 808. Snap-fit ​​rod; 809. Columnar groove; 810. Snap-fit ​​groove. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] This utility model provides, for example Figure 1-4 The clamping device for hot rolling piercing of steel pipe shown includes a processing table 1. The processing table 1 has a reserved placement groove 2 for steel pipes inside. Side plates 3 are fixedly installed on both sides of the processing table 1, and slide rails are provided inside the side plates 3. Sliding cover plates 4 are slidably connected inside the slide rails. Connecting plates 5 are fixedly connected to both sides of the sliding cover plates 4, and the connecting plates 5 are fixedly connected to the two ends of the arc frame 6. Rollers 7 are rotatably installed inside the arc frame 6 through the mounting assembly 8, and the rollers 7 are in contact with the steel pipe to be processed inside the placement groove 2.

[0024] During use, the sliding cover plate 4 descends, causing the arc frame 6 to descend, which in turn causes the roller 7 to descend and contact the steel pipe to be processed, limiting its position and facilitating subsequent piercing of the steel pipe. At the same time, when the roller 7 needs to be replaced due to wear after long-term use, the rotation of the threaded rod 802 causes the square rod 804, which is threaded to the threaded rod 802, to move inside the square groove 805. This causes the snap-fit ​​rod 808, which is fixedly connected to the front end of the square rod 804 through the connecting rod 806, to move into the columnar groove 809. In this way, the snap-fit ​​rod 808 moves away from the snap-fit ​​groove 810, realizing the disassembly and assembly of the roller 7.

[0025] There are three rollers 7, and the three rollers 7 are equidistantly arranged in a ring shape to achieve rotatable connection with the arc frame 6. The outer walls of the three rollers 7 are in contact with the outer wall of the steel pipe, while the arc frame 6 is not in contact with the steel pipe. In this way, when the rollers 7 come into contact with the rotating steel pipe to be processed, they do not affect the rotation of the steel pipe and can limit the steel pipe to facilitate piercing.

[0026] The mounting assembly 8 includes a notch 801 pre-reserved inside the roller 7, and a threaded rod 802 is rotatably connected inside the notch 801. The threaded rod 802 is threadedly connected to a threaded groove 803 pre-reserved inside the roller 7, which facilitates the rotation of the threaded rod 802 to assemble and disassemble the roller 7. The outer ring of the threaded rod 802 has two threaded sections with different thread directions, and the two threaded sections are threadedly connected to two threaded grooves 803 pre-reserved inside the roller 7. A dial wheel is fixedly installed on the outer wall of the smooth rod body in the middle of the threaded rod 802, and the dial wheel is rotatably connected to the inside of the notch 801. This allows the threaded rod 802 to be rotated through the notch 801 by the dial wheel.

[0027] The mounting assembly 8 also includes a square rod 804 that is threaded to both ends of the threaded rod 802. A connecting rod 806 is fixedly connected to the end of the square rod 804, and a snap-fit ​​rod 808 is fixedly installed at the end of the connecting rod 806. The snap-fit ​​rod 808 matches the snap-fit ​​groove 810 reserved at the end of the arc frame 6. The rotation of the threaded rod 802 causes the square rod 804, which is threaded to the threaded rod 802, to move linearly inside the square groove 805, thereby moving the snap-fit ​​rod 808, which is fixedly connected to the square rod 804 through the connecting rod 806, and thus realizing the assembly and disassembly of the roller 7 and the arc frame 6.

[0028] This rotation of the threaded rod 802 causes the square rod 804, which is threadedly connected to the threaded rod 802, to move inside the square groove 805. This causes the snap-fit ​​rod 808, which is fixedly connected to the front end of the square rod 804 via the connecting rod 806, to move into the columnar groove 809. In this way, the snap-fit ​​rod 808 moves away from the snap-fit ​​groove 810, thus enabling the disassembly and assembly of the roller 7.

[0029] The square rod 804, connecting rod 806, and snap-fit ​​rod 808 slide inside the square groove 805, through hole 807, and columnar groove 809 reserved inside the roller 7, respectively. The three grooves, square groove 805, through hole 807, and columnar groove 809, are connected to each other, ensuring smooth movement of the square rod 804, connecting rod 806, and snap-fit ​​rod 808.

[0030] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A clamping device for hot rolling piercing of steel pipes, comprising a processing table (1), characterized in that, The processing table (1) has a reserved placement groove (2) for steel pipes inside. Side plates (3) are fixedly installed on both sides of the processing table (1). A slide rail is provided inside the side plate (3). A sliding cover plate (4) is slidably connected inside the slide rail. A connecting plate (5) is fixedly connected on both sides of the sliding cover plate (4). The connecting plate (5) is fixedly connected to both ends of the arc frame (6). A roller (7) is rotatably installed inside the arc frame (6) through the installation assembly (8). The roller (7) is in contact with the steel pipe to be processed inside the placement groove (2).

2. The clamping device for hot rolling piercing of steel pipes according to claim 1, characterized in that, The rollers (7) are provided in three units, and the three rollers (7) are connected to the arc frame (6) at equal angles to achieve rotational connection. The outer walls of the three rollers (7) are in contact with the outer wall of the steel pipe, while the arc frame (6) is not in contact with the steel pipe.

3. The clamping device for hot rolling piercing of steel pipes according to claim 2, characterized in that, The mounting assembly (8) includes a notch (801) reserved inside the roller (7), and a threaded rod (802) is rotatably connected inside the notch (801), and the threaded rod (802) is threadedly connected to the threaded groove (803) reserved inside the roller (7).

4. The clamping device for hot rolling piercing of steel pipes according to claim 3, characterized in that, The outer ring of the threaded rod (802) has two threads, and the two threads have different directions. The two threads are threadedly connected to the two threaded grooves (803) reserved inside the roller (7). A dial wheel is fixedly installed on the outer wall of the smooth rod body in the middle of the threaded rod (802), and the dial wheel is rotatably connected to the inside of the notch (801).

5. A clamping device for hot rolling piercing of steel pipes according to claim 4, characterized in that, The mounting assembly (8) also includes a square rod (804) that is threaded to both ends of the threaded rod (802), and a connecting rod (806) is fixedly connected to the end of the square rod (804), and a snap-fit ​​rod (808) is fixedly installed at the end of the connecting rod (806), while the snap-fit ​​rod (808) matches the snap-fit ​​groove (810) reserved at the end of the arc frame (6).

6. The clamping device for hot rolling piercing of steel pipes according to claim 5, characterized in that, The square rod (804), connecting rod (806) and snap-fit ​​rod (808) slide inside the square groove (805), through hole (807) and columnar groove (809) reserved inside the roller (7), respectively, and the three grooves of square groove (805), through hole (807) and columnar groove (809) are connected.

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