Guide plate and adjusting device thereof

Abstract

The invention belongs to the technical field of composite pipe rolling, and particularly relates to a guide plate and an adjusting device thereof, the guide plate comprises a plurality of segmented guide plates, and the segmented guide plates are all connected with a sliding seat in a sliding mode. An adjusting device comprises fixing plates which are fixedly arranged at the upper end of a sliding seat in a bilateral symmetry mode, a rotating shaft is rotationally installed between the two fixing plates, one end of the rotating shaft penetrates through the fixing plates to be fixedly connected with an output shaft of a motor, the motor is fixedly installed on the fixing plates, and a driving wheel is in key connection with the rotating shaft. A plurality of annular driving grooves are formed in the driving wheel, guide rods are slidably installed in the driving grooves and slidably connected with the sliding seat, and the lower ends of the guide rods are fixedly connected with the corresponding segmented guide plates. The guide plate is composed of the multiple segmented guide plates, the positions of the segmented guide plates can be adjusted according to different rolling opportunities, then the phenomena of rolling clamping and tail triangle are effectively improved, and the production efficiency and the product surface quality are improved.

Description

Technical Field

[0001] This invention belongs to the field of composite tube rolling technology, specifically relating to a guide plate and its adjustment device. Background Technology

[0002] With the rapid development of industrial technology, the energy and chemical industries require pipelines resistant to strong corrosion, and pipelines with high strength, high toughness, and resistance to temperature changes are needed under extreme working conditions. Although some alloy pipes can meet these requirements, their cost is high. Bimetallic composite pipes achieve a balance between performance and cost by combining two metals, reducing the use of precious metals and thus greatly improving the product's cost-effectiveness.

[0003] Three-roll skew rolling is a metal forming process widely used in the preparation of seamless metal tubes. It boasts advantages such as process stability, continuous forming, and high production efficiency, making it one of the most promising technologies for preparing seamless metal composite tubes. The main rolling mill consists of three rolls and three guide plates. The three rolls are spaced at 120° intervals within the main mill, with a guide plate between every two rolls. The rolls apply deformation pressure to the composite tube, while the guide plates guide and restrict the circumferential deformation. Currently, most guide plates are integral, resulting in high-friction sliding friction between the guide plate and the outer wall of the composite tube during rolling. Consequently, the guide plates experience significant wear, leading to poor surface quality in the resulting composite tubes. In existing three-roll skew rolling mills, the guide plates are fixed in position during rolling, resulting in limited spatial freedom and randomness. Furthermore, manual operation is inefficient, easily leading to inaccurate guide plate alignment, poor locking during composite tube rolling, and guide plate oscillation. This results in forming defects such as severe tail triangles, outer tube tearing, and poor surface finish in the composite tube. These issues severely limit production continuity and product quality, while also impacting production efficiency and increasing equipment maintenance costs. Summary of the Invention

[0004] The present invention provides a guide plate and its adjustment device to address the above-mentioned problems.

[0005] To achieve the above objectives, the present invention employs the following technical solution: A guide plate includes multiple segmented guide plates, each of which is slidably connected to a slide block.

[0006] Furthermore, rollers are rotatably provided on the side of the segmented guide plate near the composite pipe.

[0007] Furthermore, the included angle between the roller axis and the composite pipe axis is the same as the bite angle.

[0008] An adjustment device includes two fixed plates symmetrically fixedly mounted on the upper end of a slide. A rotating shaft is rotatably mounted between the two fixed plates. One end of the rotating shaft passes through the fixed plates and is fixedly connected to the output shaft of a motor. The motor is fixedly mounted on the fixed plates. A drive wheel is keyed to the rotating shaft. Multiple annular drive grooves are formed on the drive wheel. A guide rod is slidably mounted in the drive groove. The guide rod is slidably connected to the slide. The lower end of the guide rod is fixedly connected to a corresponding segmented guide plate.

[0009] Furthermore, transverse sliding grooves are provided on both sides of the drive groove, and a pin is provided at the upper end of the guide rod, the pin being slidably connected to the transverse sliding groove.

[0010] Furthermore, the upper end face of the guide rod is spherical, and the cross-section of the drive groove is arc-shaped, so as to facilitate line contact between the guide rod and the drive groove.

[0011] Furthermore, the unfolding curve of the drive groove is the same as the motion trajectory of the corresponding segmented guide plate.

[0012] Compared with the prior art, the present invention has the following advantages: The guide plate in this invention makes flexible contact with the composite tube, which can effectively improve the surface finish of the outer wall of the composite tube. At the same time, the guide plate of this invention is composed of multiple segmented guide plates, which can adjust the position of each segmented guide plate according to different rolling times, thereby effectively improving the phenomena of rolling jamming and tail triangle, and improving production efficiency and product surface quality. Attached Figure Description

[0013] Figure 1 This is a schematic diagram showing the arrangement of the guide plate of the present invention; Figure 2 This is a schematic diagram of the structure of the adjusting device of the present invention; Figure 3 This is a schematic diagram of the drive wheel structure of the present invention; Figure 4 This is a schematic diagram of the structure of the rotating shaft of the present invention; Figure 5 This is a schematic diagram of the guide rod of the present invention; Figure 6 This is a schematic diagram of the structure of the guide plate of the present invention; Figure 7 This is a schematic diagram of the installation of the guide plate of the present invention; Figure 8 This is a diagram showing the initial state of the guide plate in Embodiment 2 of the present invention; Figure 9 This is a diagram showing the state of the guide plate during the insertion of the composite tube in Embodiment 2 of the present invention. Figure 10 This is a diagram showing the state of the guide plate during the rolling of the composite tube in Embodiment 2 of the present invention; Figure 11 This is a diagram showing the state of the guide plate when the composite tube is withdrawn in Embodiment 2 of the present invention; Figure 12 This is a trajectory diagram of the drive slot in Embodiment 2 of the present invention; In the figure, there is a segmented guide plate 1, a slide block 2, a roller 3, a fixed plate 4, a rotating shaft 5, a motor 6, a drive wheel 7, a drive groove 8, a guide rod 9, a transverse slide groove 10, and a pin 11. Detailed Implementation

[0014] To further illustrate the technical solution of the present invention, the present invention will be further described below through embodiments. Example 1

[0015] like Figure 6 and Figure 7 As shown, a guide plate includes multiple segmented guide plates 1, each of which is slidably connected to a slide block 2. A roller 3 is rotatably disposed on the side of the segmented guide plate 1 near the composite pipe, and the included angle between the axis of the roller 3 and the axis of the composite pipe is the same as the bite angle.

[0016] like Figures 1 to 5 As shown, an adjustment device includes fixed plates 4 symmetrically fixedly mounted on the upper end of a slide block 2. A rotating shaft 5 is rotatably mounted between the two fixed plates 4. One end of the rotating shaft 5 passes through the fixed plates 4 and is fixedly connected to the output shaft of a motor 6. The motor 6 is fixedly mounted on the fixed plates 4. A drive wheel 7 is keyed to the rotating shaft 5. Multiple annular drive grooves 8 are formed on the drive wheel 7. The unfolded curve of the drive groove 8 is the same as the movement trajectory of the corresponding segmented guide plate 1. A guide rod 9 is slidably mounted in the drive groove 8. The guide rod 9 is slidably connected to the slide block 2. The upper end surface of the guide rod 9 is spherical. The cross section of the drive groove 8 is arc-shaped to facilitate line contact between the guide rod 9 and the drive groove 8. Transverse sliding grooves 10 are provided on both side walls of the drive groove 8. A pin 11 is provided at the upper end of the guide rod 9. The pin 11 is slidably connected to the transverse sliding groove 10. The lower end of the guide rod 9 is fixedly connected to the corresponding segmented guide plate 1. Example 2

[0017] In this embodiment, there are three segmented guide plates 1. Figures 8 to 12As shown, the composite tube rolling is performed from left to right. In the initial stage, the three segmented guide plates 1 are set flush. In the biting stage, all three segmented guide plates 1 move closer to the workpiece surface. Among them, the segmented guide plate 1 on the rolling entrance side is closer to the workpiece surface than the other two segmented guide plates 1, while the other two segmented guide plates 1 remain flush. This facilitates the formation of a triangular area at the front end of the workpiece, which is beneficial for the workpiece biting. In the rolling stage, all three segmented guide plates 1 move away from the workpiece surface. Among them, the segmented guide plate 1 on the rolling entrance side and the middle segmented guide plate 1... Maintaining the same distance from the workpiece surface, the segmented guide plate 1 on the rolling exit side returns to its initial position. This is beneficial for the stable rolling of the workpiece and avoids tearing and jamming of the outer tube of the workpiece. During the take-off stage, the segmented guide plate 1 on the rolling inlet side and the segmented guide plate 1 on the rolling exit side maintain the same state as in the rolling stage. The middle segmented guide plate 1 is far away from the workpiece surface, and the distance between the middle segmented guide plate 1 and the workpiece surface is less than the distance between the segmented guide plate 1 on the rolling exit side and the workpiece surface. This helps to reduce the tail triangle problem of the workpiece.

[0018] The foregoing has shown and described the main features and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0019] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A guide plate, characterized in that: It includes multiple segmented guide plates (1), and all of the multiple segmented guide plates (1) are slidably connected to the slide (2).

2. A guide plate according to claim 1, characterized in that: Rollers (3) are rotatably provided on the side of the segmented guide plate (1) near the composite pipe.

3. A guide plate according to claim 2, characterized in that: The included angle between the axis of the roller (3) and the axis of the composite pipe is the same as the bite angle.

4. An adjustment device for the guide plate of claim 2, characterized in that: The device includes two fixed plates (4) symmetrically fixed on the upper end of the slide (2). A rotating shaft (5) is rotatably installed between the two fixed plates (4). One end of the rotating shaft (5) passes through the fixed plate (4) and is fixedly connected to the output shaft of the motor (6). The motor (6) is fixedly installed on the fixed plate (4). A drive wheel (7) is keyed to the rotating shaft (5). Multiple annular drive grooves (8) are opened on the drive wheel (7). A guide rod (9) is slidably installed in the drive groove (8). The guide rod (9) is slidably connected to the slide (2). The lower end of the guide rod (9) is fixedly connected to the corresponding segmented guide plate (1).

5. The adjusting device according to claim 4, characterized in that: A transverse sliding groove (10) is provided on both sides of the drive groove (8), and a pin (11) is provided at the upper end of the guide rod (9). The pin (11) is slidably connected to the transverse sliding groove (10).

6. The adjusting device according to claim 5, characterized in that: The upper end surface of the guide rod (9) is spherical, and the cross section of the drive groove (8) is arc-shaped, so as to facilitate the line contact between the guide rod (9) and the drive groove (8).

7. The adjusting device according to claim 6, characterized in that: The unfolding curve of the drive groove (8) is the same as the motion trajectory of the corresponding segmented guide plate (1).

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