Seamless steel tube perforating machine and guide plate frame locking device thereof
By using a screw positioning structure and a beveled surface design, the problems of insufficient positioning accuracy and locking force of the guide plate frame in the seamless steel pipe piercing machine are solved, achieving precise positioning and stable locking of the guide plate frame, and improving the quality and efficiency of steel pipe production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-24
AI Technical Summary
The positioning accuracy of the guide plate frame of the existing seamless steel pipe piercing machine depends on the processing quality of the parts. The accumulated error cannot be eliminated, and the locking force is insufficient, which makes the guide plate frame prone to displacement and vibration during the rolling process, affecting the quality of steel pipes and production efficiency.
The design employs a screw positioning structure and a beveled surface, which compensates for accumulated errors by adjusting the position of the positioning screw and enhances the locking force by utilizing the force amplification effect of the beveled surface. Combined with the cooperation of the active and passive sliders, friction loss is reduced, ensuring positioning accuracy and locking effect.
It achieves precise positioning and stable locking of the guide plate frame, reduces displacement and vibration of the guide plate frame during the rolling process, and improves the quality and production efficiency of steel pipes.
Smart Images
Figure CN121715418A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the technical field of seamless steel pipe piercing machine, and particularly relates to a seamless steel pipe piercing machine and its guide plate frame locking device. Background Technology
[0002] Rolling mill machinery is the core equipment of the steel industry, and the seamless steel pipe production process places extremely high demands on equipment stability. As a key piece of equipment in seamless steel pipe production, the piercing mill's guide plate must provide precise guidance and stable support for the steel pipe during the rolling process. The operational stability of the guide plate directly determines core quality indicators such as the uniformity of wall thickness and roundness of the steel pipe, and is of great significance for ensuring the production efficiency and product qualification rate of seamless steel pipes.
[0003] The existing horizontal locking device for the guide plate frame of a piercing mill has significant technical defects and cannot meet the needs of stable production. The positioning end uses a fixed machining component structure, meaning its positioning accuracy depends entirely on the quality of the machined parts. Accumulated errors generated during machining and assembly cannot be eliminated, and wear on the positioning surface after long-term use cannot be effectively compensated for, leading to a continuous decline in positioning accuracy. The locking end uses a design where a hydraulic cylinder acts directly on the locking surface. The impact load during rolling is directly borne by the hydraulic cylinder, resulting in limited locking force and a significantly shortened lifespan of the hydraulic cylinder. These problems collectively cause the guide plate frame to be prone to displacement and vibration during rolling, resulting in poor stability and consequently quality issues such as dimensional deviations and surface defects in the steel pipe. Therefore, there is an urgent need for a seamless steel pipe piercing mill and its guide plate frame locking device. Summary of the Invention
[0004] To address some or all of the technical problems existing in the prior art, the present invention provides a seamless steel pipe piercing machine and its guide plate frame locking device.
[0005] In one aspect of the present invention, a guide plate frame locking device for a seamless steel pipe piercing machine is provided. The guide plate frame locking device is disposed on the frame of the seamless steel pipe piercing machine. The guide plate frame locking device includes a positioning component disposed on one side of the guide plate frame and a locking component disposed on the other side of the guide plate frame, wherein: The positioning assembly includes a first frame fixed to the frame and located on one side of the guide plate frame, a first hydraulic cylinder disposed on one side of the first frame, a positioning screw slidably connected to the other side of the first frame, a first active slider connected between the positioning screw and the first hydraulic cylinder, and a first passive slider disposed between the first active slider and the guide plate frame. One end of the first active slider and the first passive slider are in contact with each other, and the contact surface is a first inclined surface. The first passive slider is slidably connected to the inner side of the frame. The locking assembly includes a second frame fixed to the frame and located on the other side of the guide plate frame, a second hydraulic cylinder disposed on one side of the second frame, a second active slider connected to one end of the second hydraulic cylinder, and a second passive slider disposed between the second active slider and the guide plate frame. One end of the second active slider and the second passive slider are in contact with each other, and the contact surface is a second inclined surface. The second passive slider is slidably connected to the inner side of the second frame.
[0006] Furthermore, in the guide plate frame locking device of the above-mentioned seamless steel pipe piercing machine, the first frame includes a first horizontal plate and a first support plate vertically arranged at both ends of the first horizontal plate. The centers of the two first support plates are each provided with a first through hole with the same axis. The first hydraulic cylinder push rod passes through the first through hole on one side and is connected to the first active slider. A bushing is fitted inside the first through hole on the other side. A sleeve is fitted inside the bushing. The positioning screw is slidably connected to the inner wall of the sleeve. An anti-loosening nut is threadedly connected to the outer circumference of the sleeve. The end of the anti-loosening nut abuts against the end of the bushing.
[0007] Furthermore, in the guide plate frame locking device of the above-mentioned seamless steel pipe piercing machine, a first liner is fixed to the inner side of the first support plate by fasteners, and a first slide plate is provided between the first liner and the first passive slider. One side of the first slide plate is embedded in the first passive slider, and the other side is slidably connected to the first liner.
[0008] Furthermore, in the guide plate frame locking device of the above-mentioned seamless steel pipe piercing machine, a pad is provided between the end of the positioning screw and one side of the first active slider, a first limiting groove is provided on the other side of the first active slider, and a first push head matching the limiting groove is provided at the end of the first hydraulic cylinder push rod, and the first push head is embedded in the first limiting groove.
[0009] Furthermore, in the guide plate frame locking device of the above-mentioned seamless steel pipe piercing machine, the second frame includes a second horizontal plate and a second support plate vertically arranged at both ends of the second horizontal plate. A second through hole is opened in the center of one side of the second support plate, and the second hydraulic cylinder push rod passes through the second through hole and is connected to the second active slider.
[0010] Furthermore, in the guide plate frame locking device of the above-mentioned seamless steel pipe piercing machine, a second liner is fixed to the inner side of the second support plate by fasteners, and a second slide plate is provided between the second liner and the second passive slider. One side of the second slide plate is embedded in the second passive slider, and the other side is slidably connected to the second liner.
[0011] Furthermore, in the guide plate frame locking device of the above-mentioned seamless steel pipe piercing machine, a second limiting groove is provided on one side of the second active slider, and a second push head matching the limiting groove is provided at the end of the second hydraulic cylinder push rod, and the second push head is embedded in the second limiting groove.
[0012] Furthermore, in the guide plate frame locking device of the aforementioned seamless steel pipe piercing machine, the inclination angles of the first inclined plane and the second inclined plane are both 10°~12° of the inclined vertical plane.
[0013] Furthermore, in the guide plate locking device of the aforementioned seamless steel pipe piercing machine, the thrust of the first hydraulic cylinder is greater than the thrust of the second hydraulic cylinder.
[0014] In another aspect of the invention, a seamless steel pipe piercing machine is also provided, the seamless steel pipe piercing machine including the above-described guide plate frame locking device.
[0015] The seamless steel pipe piercing machine and its guide plate locking device of the present invention have the following advantages and positive effects: (1) The positioning end of the present invention adopts a screw positioning structure. By adjusting the screw position of the positioning screw in advance according to the working conditions and fixing it with the anti-loosening nut, the cumulative error generated during the processing and assembly can be effectively compensated. When the positioning-related components are worn after long-term use, the positioning screw position can be readjusted to achieve accuracy compensation, ensure accurate positioning, and avoid the problem of continuous decline in positioning accuracy. (2) The locking end of the present invention adopts a beveled fit structure. By utilizing the force amplification effect of the bevel, the thrust of the hydraulic cylinder is converted into a larger horizontal locking force, which significantly enhances the locking effect of the horizontal locking device on the guide plate frame. At the same time, it avoids the impact load being directly borne by the hydraulic cylinder, effectively extending the service life of the hydraulic cylinder. (3) The present invention reduces frictional loss between components and improves the stability of device operation by using the cooperative design of active slider and passive slider, as well as the sliding connection structure of slide plate and liner plate. It also reduces the displacement and vibration of guide plate frame during rolling, thereby reducing the probability of quality problems such as steel pipe size deviation and surface defects, and improving seamless steel pipe production efficiency and product qualification rate. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1This is a schematic diagram of the guide plate frame locking device of the seamless steel pipe piercing machine of the present invention; Figure 2 This is a schematic diagram of the positioning component in the guide plate frame locking device of the seamless steel pipe piercing machine of the present invention; Figure 3 This is a schematic diagram of the locking component in the guide plate frame locking device of the seamless steel pipe piercing machine of the present invention.
[0017] Explanation of reference numerals in the attached figures: 1. Positioning assembly; 11. First frame; 12. First liner; 13. First slide plate; 14. First hydraulic cylinder; 15. First push head; 16. Positioning screw; 17. First active slider; 18. First passive slider; 19. Bushing; 120. Anti-loosening nut; 121. Sleeve; 122. Pad; 2. Locking assembly; 21. Second frame; 22. Second liner; 23. Second slide plate; 24. Second hydraulic cylinder; 25. Second push head; 26. Second active slider; 27. Second passive slider; 3. Guide plate frame. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.
[0019] This invention provides a seamless steel pipe piercing machine and its guide plate frame locking device, such as... Figures 1 to 3 As shown, the guide plate frame locking device of the seamless steel pipe piercing machine is installed on the frame of the seamless steel pipe piercing machine. The guide plate frame locking device includes a positioning component installed on one side of the guide plate frame and a locking component installed on the other side of the guide plate frame, wherein: The positioning assembly includes a first frame fixed to the frame and located on one side of the guide plate frame, a first hydraulic cylinder disposed on one side of the first frame, a positioning screw slidably connected to the other side of the first frame, a first active slider connected between the positioning screw and the first hydraulic cylinder, and a first passive slider disposed between the first active slider and the guide plate frame. One end of the first active slider and the first passive slider are in contact with each other, and the contact surface is a first inclined surface. The first passive slider is slidably connected to the inner side of the frame. When the first active slider moves towards the positioning screw under the push of the first hydraulic cylinder, the first inclined surface will generate a component force perpendicular to the direction of the guide plate frame on the first passive slider, pushing the first passive slider to move towards the guide plate frame until the first passive slider is tightly in contact with the guide plate frame, thereby achieving positioning. The locking assembly includes a second frame fixed to the machine frame and located on the other side of the guide plate frame, a second hydraulic cylinder disposed on one side of the second frame, a second active slider connected to one end of the second hydraulic cylinder, and a second passive slider disposed between the second active slider and the guide plate frame. One end of the second active slider and the second passive slider are in contact with each other, and the contact surface is a second inclined surface. The second passive slider is slidably connected to the inner side of the second frame. It should be noted that the main difference between the locking assembly and the positioning assembly is that the locking assembly does not have a positioning screw structure. Its core function is to provide locking force through the tight contact between the second passive slider and the guide plate frame, while the positioning assembly achieves precise positioning through a positioning screw. The two have a clear division of labor and work together.
[0020] Furthermore, in the guide plate locking device of the seamless steel pipe piercing machine of the present invention, the first frame includes a first horizontal plate and a first support plate vertically arranged at both ends of the first horizontal plate. More specifically, two first support plates are vertically welded to both ends of the first horizontal plate to form a U-shaped frame structure. The center of each of the two first support plates is provided with a first through hole with the same axis. The coincidence of the axes provides a coaxial reference for the installation of subsequent components. The first hydraulic cylinder push rod passes through the first through hole on one side and is connected to the first active slider. A bushing is sleeved in the first through hole on the other side. A sleeve is sleeved in the bushing. The positioning screw is slidably connected to the inner wall of the sleeve. More specifically, the positioning screw passes through the sleeve. One end of the positioning screw extends into the interior of the first frame and is arranged opposite to the first active slider. The other end is located on the outside of the first frame, which is convenient for the operator to adjust the screw position. A lock nut is threaded on the outer circumference of the sleeve. The end of the lock nut abuts against the end of the bushing. When the positioning screw is adjusted to a suitable position, tightening the lock nut can lock the position of the positioning screw and prevent it from shifting during operation.
[0021] In one specific embodiment, in the guide plate frame locking device of the seamless steel pipe piercing machine of the present invention, a first liner is fixed to the inner side of the first support plate by fasteners, and a first slide plate is provided between the first liner and the first passive slider. One side of the first slide plate is embedded in the first passive slider, and the other side is slidably connected to the first liner. The first slide plate is made of a self-lubricating material, which can effectively reduce the coefficient of friction between the first passive slider and the first liner, reduce wear, and improve sliding smoothness.
[0022] In one specific embodiment, in the guide plate locking device of the seamless steel pipe piercing machine of the present invention, a pad is provided between the end of the positioning screw and one side of the first active slider. More specifically, the pad is made of elastic wear-resistant material, which can buffer the impact force between the first active slider and the positioning screw on the one hand, and adjust the positioning accuracy by replacing the pad with a pad of different thicknesses on the other hand. In order to ensure the reliability of the connection between the first hydraulic cylinder push rod and the first active slider and the power transmission efficiency, a first limiting groove is provided on the other side of the first active slider. The end of the first hydraulic cylinder push rod is provided with a first push head that matches the limiting groove. The first push head is embedded in the first limiting groove. This structural design can prevent relative sliding between the push rod and the first active slider and ensure that the thrust of the first hydraulic cylinder can be completely transmitted to the first active slider.
[0023] Furthermore, in the guide plate frame locking device of the seamless steel pipe piercing machine of the present invention, the structure of the second frame is similar to that of the first frame. The second frame includes a second horizontal plate and a second support plate vertically arranged at both ends of the second horizontal plate to form a U-shaped structure. It is fixed to the machine frame by the second horizontal plate. A second through hole is opened in the center of one side of the second support plate. The second hydraulic cylinder push rod passes through the second through hole and is connected to the second active slider.
[0024] In one specific embodiment, in the guide plate frame locking device of the seamless steel pipe piercing machine of the present invention, a second liner is fixed to the inner side of the second support plate by fasteners, and a second slide plate is provided between the second liner and the second passive slider. One side of the second slide plate is embedded in the second passive slider, and the other side is slidably connected to the second liner, thereby reducing sliding friction and improving the service life of the components.
[0025] In one specific embodiment, in the guide plate frame locking device of the seamless steel pipe piercing machine of the present invention, a second limiting groove is provided on one side of the second active slider, and a second push head matching the limiting groove is provided at the end of the second hydraulic cylinder push rod, and the second push head is embedded in the second limiting groove.
[0026] In one specific embodiment, in the guide plate frame locking device of the seamless steel pipe piercing machine of the present invention, the inclination angle of the first inclined plane and the second inclined plane is 10°~12° of the inclined vertical plane, and more specifically, the inclination angle of the first inclined plane and the second inclined plane is 11° of the inclined vertical plane.
[0027] In one specific embodiment, in the guide plate locking device of the seamless steel pipe piercing machine of the present invention, the thrust of the first hydraulic cylinder is greater than that of the second hydraulic cylinder. This is because the positioning component needs to overcome greater resistance to achieve accurate positioning, while the locking component, under the amplification of the inclined plane force, can obtain sufficient locking force without excessive hydraulic cylinder thrust, and ensures that the second hydraulic cylinder does not compress the stroke of the first hydraulic cylinder when it is working.
[0028] The working principle of the guide plate locking device of the seamless steel pipe piercing machine of the present invention is as follows: Positioning Stage: The operator first rotates the positioning screw according to the rolling conditions, adjusts its screw position in the sleeve, and determines the maximum travel of the first active slider. After adjustment, the anti-loosening nut is tightened to lock the position of the positioning screw. The first hydraulic cylinder is then activated, and the push rod of the first hydraulic cylinder extends to push the first active slider towards the positioning screw. During the movement of the first active slider, it generates a lateral thrust on the first passive slider through the first inclined surface, pushing the first passive slider to slide along the first liner towards the guide plate frame. When the first active slider moves to abut against the pad at the end of the positioning screw, the first hydraulic cylinder stops. At this time, the first passive slider is in close contact with the guide plate frame, achieving precise positioning of the guide plate frame. Locking stage: After positioning is completed, the second hydraulic cylinder is activated. The push rod of the second hydraulic cylinder extends and pushes the second active slider to move towards the second passive slider. Through the force transmission of the second inclined plane, the second passive slider slides along the guide plate towards the guide plate frame until it is tightly fitted with the guide plate frame. Due to the force amplification effect of the second inclined plane, the thrust of the second hydraulic cylinder is amplified, so that the second passive slider generates a sufficiently large locking force on the guide plate frame, and firmly locks the guide plate frame between the positioning component and the locking component. After the rolling process is completed, first control the push rod of the second hydraulic cylinder to retract, driving the second active slider to reset. The second passive slider resets under the reaction force of the guide plate frame, releasing the locking of the guide plate frame. Then control the push rod of the first hydraulic cylinder to retract, driving the first active slider to reset. The first passive slider also resets, releasing the positioning of the guide plate frame. At this time, the guide plate frame can be adjusted or maintained. If the positioning-related components wear down after long-term use, resulting in a decrease in positioning accuracy, the anti-loosening nut can be loosened, and the screw position of the positioning screw can be readjusted to compensate for the error caused by wear, ensuring that the positioning accuracy can be restored to the normal level.
[0029] On the other hand, the present invention also provides a seamless steel pipe piercing machine, which includes the above-mentioned guide plate frame locking device.
[0030] In summary, compared with the prior art, the seamless steel pipe piercing machine and its guide plate locking device of the present invention have the following advantages and positive effects: (1) The positioning end of the present invention adopts a screw positioning structure. By adjusting the screw position of the positioning screw in advance according to the working conditions and fixing it with the anti-loosening nut, the cumulative error generated during the processing and assembly can be effectively compensated. When the positioning-related components are worn after long-term use, the positioning screw position can be readjusted to achieve accuracy compensation, ensure accurate positioning, and avoid the problem of continuous decline in positioning accuracy. (2) The locking end of the present invention adopts a beveled fit structure. By utilizing the force amplification effect of the bevel, the thrust of the hydraulic cylinder is converted into a larger horizontal locking force, which significantly enhances the locking effect of the horizontal locking device on the guide plate frame. At the same time, it avoids the impact load being directly borne by the hydraulic cylinder, effectively extending the service life of the hydraulic cylinder. (3) The present invention reduces frictional loss between components and improves the stability of device operation by using the cooperative design of active slider and passive slider, as well as the sliding connection structure of slide plate and liner plate. It also reduces the displacement and vibration of guide plate frame during rolling, thereby reducing the probability of quality problems such as steel pipe size deviation and surface defects, and improving seamless steel pipe production efficiency and product qualification rate.
[0031] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.
[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims
1. A guide plate frame locking device for a seamless steel pipe piercing machine, wherein the guide plate frame locking device is disposed on the frame of the seamless steel pipe piercing machine, characterized in that, The guide plate frame locking device includes a positioning component disposed on one side of the guide plate frame and a locking component disposed on the other side of the guide plate frame, wherein: The positioning assembly includes a first frame fixed to the frame and located on one side of the guide plate frame, a first hydraulic cylinder disposed on one side of the first frame, a positioning screw slidably connected to the other side of the first frame, a first active slider connected between the positioning screw and the first hydraulic cylinder, and a first passive slider disposed between the first active slider and the guide plate frame. One end of the first active slider and the first passive slider are in contact with each other, and the contact surface is a first inclined surface. The first passive slider is slidably connected to the inner side of the frame. The locking assembly includes a second frame fixed to the frame and located on the other side of the guide plate frame, a second hydraulic cylinder disposed on one side of the second frame, a second active slider connected to one end of the second hydraulic cylinder, and a second passive slider disposed between the second active slider and the guide plate frame. One end of the second active slider and the second passive slider are in contact with each other, and the contact surface is a second inclined surface. The second passive slider is slidably connected to the inner side of the second frame.
2. The guide plate frame locking device of the seamless steel pipe piercing machine according to claim 1, characterized in that, The first frame includes a first horizontal plate and first support plates vertically disposed at both ends of the first horizontal plate. The centers of the two first support plates are provided with first through holes with coincident axes. The first hydraulic cylinder push rod passes through one of the first through holes and is connected to the first active slider. A bushing is fitted inside the first through hole on the other side. A sleeve is fitted inside the bushing. The positioning screw is slidably connected to the inner wall of the sleeve. An anti-loosening nut is threadedly connected to the outer circumference of the sleeve. The end of the anti-loosening nut abuts against the end of the bushing.
3. The guide plate frame locking device of the seamless steel pipe piercing machine according to claim 2, characterized in that, A first liner is fixed to the inner side of the first support plate by fasteners. A first slide plate is provided between the first liner and the first passive slider. One side of the first slide plate is embedded in the first passive slider, and the other side is slidably connected to the first liner.
4. The guide plate frame locking device of the seamless steel pipe piercing machine according to claim 3, characterized in that, A pad is provided between the end of the positioning screw and one side of the first active slider. A first limiting groove is provided on the other side of the first active slider. A first push head matching the limiting groove is provided at the end of the first hydraulic cylinder push rod. The first push head is embedded in the first limiting groove.
5. The guide plate frame locking device of the seamless steel pipe piercing machine according to claim 1, characterized in that, The second frame includes a second horizontal plate and a second support plate vertically disposed at both ends of the second horizontal plate. A second through hole is provided in the center of one side of the second support plate, and the second hydraulic cylinder push rod passes through the second through hole and is connected to the second active slider.
6. The guide plate frame locking device of the seamless steel pipe piercing machine according to claim 5, characterized in that, The second support plate is fixed to the inner side by fasteners. A second slide plate is provided between the second support plate and the second passive slider. One side of the second slide plate is embedded in the second passive slider, and the other side is slidably connected to the second support plate.
7. The guide plate frame locking device of the seamless steel pipe piercing machine according to claim 6, characterized in that, The second active slider has a second limiting groove on one side, and the end of the second hydraulic cylinder push rod is provided with a second push head that matches the limiting groove. The second push head is embedded in the second limiting groove.
8. The guide plate frame locking device of the seamless steel pipe piercing machine according to claim 1, characterized in that, The inclination angles of the first and second inclined planes are both 10° to 12°, which are inclined vertical planes.
9. The guide plate frame locking device of the seamless steel pipe piercing machine according to claim 1, characterized in that, The thrust of the first hydraulic cylinder is greater than that of the second hydraulic cylinder.
10. A seamless steel pipe piercing machine, characterized in that, The seamless steel pipe piercing machine includes the guide plate frame locking device as described in any one of claims 1-9.