Efficient adjusting device and method for guide plate of three-roller skew rolling mill

Abstract

The invention belongs to the technical field of seamless metal composite pipe forming, and particularly relates to an efficient adjusting device and method for a three-roller skew rolling mill guide plate, the efficient adjusting device comprises a sliding seat, arc-shaped sliding blocks are arranged on the left side and the right side of the sliding seat, the arc-shaped sliding blocks are arranged in arc-shaped sliding grooves in a sliding mode, and the arc-shaped sliding grooves are formed in a rack; arc-shaped teeth are symmetrically arranged on the left side and the right side of the upper surface of the sliding base and connected with gears in a meshed mode, the gears are installed on a rotating shaft, the rotating shaft is installed in two bearing pedestals, the bearing pedestals are fixedly installed on a support, the support is fixedly installed on a machine frame through bolts, and one end of the rotating shaft penetrates through the machine frame to be fixedly connected with an output shaft of a motor. According to the seamless bimetal composite pipe rolling device, the position of the guide plate can be adjusted in the radial direction, the circumferential direction and the axial direction, the seamless bimetal composite pipe rolling device can cope with more complex rolling conditions, the product quality can be improved, and more varieties of seamless bimetal composite pipes can be produced.

Description

Technical Field

[0001] The invention belongs to the technical field of seamless metal composite pipe forming, and in particular relates to a high-efficiency adjustment device and method for a guide plate of a three-roller oblique rolling mill. Background Art

[0002] With the rapid development of industrial technology, the performance requirements for seamless metal pipes under some extreme conditions are getting higher and higher. Although some alloy pipes can meet the performance requirements, they are expensive and difficult to form. Seamless metal composite pipes are made by compounding component metals, which can fully utilize the performance advantages of component metals and reduce the use of special metals, greatly improving the product cost performance. Therefore, they are widely used in aerospace, oil extraction, chemical corrosive media transportation, military industry, nuclear power and other fields.

[0003] The three-roller oblique rolling process is a rolling process for local loading and large aspect ratio tube manufacturing, which is widely used in the preparation of seamless metal tubes. This process has many advantages such as stable process, continuous forming, and high production efficiency, so it has become one of the most promising seamless metal composite tube preparation technologies. The main part of the rolling mill has three rollers and three guide plates. The three rollers are distributed at 120° in the main space. There is a guide plate between every two rollers. The rollers give deformation pressure to the composite tube, and the guide plate guides and limits the deformation of the composite tube. During the rolling process, the composite tube billet undergoes severe metal plastic deformation and becomes a triangular shape. In severe cases, the outer wall of the metal tube will be squeezed into the gap between the rollers and the guide plate, resulting in rolling jams. In addition, when the composite tube is being compounded at the end, there is no deformation restriction on the rear metal tube, which will cause a serious tail triangle phenomenon, which will also cause rolling jams. The above situation seriously limits the continuity of production and the quality of the product. Adjusting the position of the guide plate between the two rollers can effectively improve the rolling jam phenomenon and improve production efficiency and product quality.

[0004] In the existing three-roller oblique rolling mill, the guide plate mainly moves in one direction by means of a screw nut, and manual operation and measurement are required, which results in low efficiency, little spatial freedom, and is unable to avoid the tearing of the tail triangle and outer tube of composite pipes of specific materials and wall thicknesses.

[0005] Therefore, in order to achieve continuous and efficient production, efficient and high-precision position adjustment of the guide plate of the three-roller oblique rolling mill has become an issue that needs to be urgently addressed. Summary of the invention

[0006] In view of the above problems, the present invention provides a highly efficient adjustment device and method for a guide plate of a three-roller oblique rolling mill.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] A high-efficiency adjustment device for a guide plate of a three-roller oblique rolling mill comprises a slide seat, an end cover is fixedly arranged on the upper end surface of the slide seat, a hydraulic motor is fixed on the upper surface of the end cover, an output shaft of the hydraulic motor passes through the end cover and is fixedly connected to a lead screw, a transmission block is threadedly connected to the lead screw, the transmission block is fixedly connected to a slide plate, a clearance hole for making way for the lead screw is opened on the slide plate, the slide plate is slidably arranged in the slide seat, a guide plate base is connected to the lower end of the slide plate, a guide plate is connected to the lower end of the guide plate base, a pressure plate is fixedly connected to the front end surface of the slide seat by bolts, and a locking oil cylinder is connected to the pressure plate by bolts. The movable end of the locking cylinder is in contact with the slide plate, and an arc-shaped sliding block is provided on both sides of the slide seat, and the arc-shaped sliding block is slidably arranged in an arc-shaped slide groove, and the arc-shaped slide groove is opened on the frame, and arc-shaped teeth are symmetrically arranged on the left and right sides of the upper surface of the slide seat, and the arc-shaped teeth are meshed and connected with gears, and the gears are installed on the rotating shaft, and the rotating shaft is installed in two bearing seats, and the bearing seats are fixedly installed on the bracket, and the bracket is fixedly installed on the frame by bolts, and one end of the rotating shaft passes through the frame and is fixedly connected to the output shaft of the motor, and the motor is fixedly installed on the support plate, and the support plate is fixedly installed on the frame by bolts.

[0009] Furthermore, a hydraulic cylinder is provided at the outer end of the arc-shaped slider, a piston rod of the hydraulic cylinder is in contact with the outer end of the arc-shaped slider, a cylinder body of the hydraulic cylinder is installed in a support frame, and the support frame is fixed to the frame by bolts.

[0010] Furthermore, a pad is fixedly provided on the outer end of the arc-shaped slider to increase the contact area between the arc-shaped slider and the hydraulic cylinder.

[0011] Furthermore, the centers of the arc-shaped slider, the arc-shaped chute and the arc-shaped teeth are all located on the rolling center line.

[0012] Furthermore, an encoder No. 1 and an encoder No. 2 are respectively installed on the output shafts of the hydraulic motor and the electric motor. The encoder No. 1 and the encoder No. 2 are both connected to a control console and are respectively used to detect the displacement distance of the slide and the swing angle of the slide. The hydraulic cylinder is equipped with a displacement sensor for detecting the displacement distance of the slide. The control console is also connected to the hydraulic motor, the locking cylinder, the electric motor and the hydraulic cylinder to control the operation of the hydraulic motor, the locking cylinder, the electric motor and the hydraulic cylinder.

[0013] Furthermore, an oblique cut is arranged on the end surface of the guide plate in contact with the pipe, and the oblique cut is arranged on a side close to the rolling entrance.

[0014] Furthermore, grooves are provided on the upper and lower arc surfaces of the arc-shaped slide groove, and rollers are installed in the grooves to reduce the friction between the arc-shaped slider and the arc-shaped slide groove.

[0015] An efficient adjustment method for a guide plate of a three-roller skew rolling mill includes radial position adjustment, circumferential position adjustment and axial position adjustment, specifically:

[0016] Radial position adjustment: Start the hydraulic motor through the control console, control the hydraulic motor to rotate forward or reverse according to the target position of the guide plate, and drive the lead screw to rotate through the hydraulic motor. As the lead screw rotates, the transmission block drives the slide plate and the guide plate to move radially from the initial position to the target position. At the same time, the displacement distance of the guide plate is determined by the signal detected by the No. 1 encoder, and then it is judged whether the guide plate has moved to the target position. When the guide plate moves to the target position, the control console controls the hydraulic motor to stop working, and then controls the locking cylinder to extend, locks and fixes the slide plate to ensure its stable position, and completes the adjustment of the radial position of the guide plate;

[0017] Circumferential position adjustment: adjust the hydraulic cylinder to the pressure relief state through the control console, start the motor, and control the motor to rotate forward or reverse according to the target angle of the guide plate, drive the gear to rotate, and the arc teeth are displaced under the drive of the gear, so that the arc slider moves along the arc slide, and finally the angle adjustment of the guide plate is achieved. The angle of the guide plate is determined by the signal detected by the No. 2 encoder. When it is detected that the guide plate rotates to the target angle, the motor stops working and the circumferential position adjustment of the guide plate is completed;

[0018] Axial position adjustment: According to the target position of the guide plate, the hydraulic cylinder is controlled by the console to work, thereby pushing the slide to move. During the displacement process, the extension / retraction length of the hydraulic cylinder is detected by the displacement sensor provided by the hydraulic cylinder. When it is detected that the guide plate has reached the target position, the arc-shaped slide block is locked by the hydraulic cylinder to complete the adjustment of the axial position of the guide plate.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The present invention can adjust the position of the guide plate in radial, circumferential and axial directions, can cope with more complex rolling conditions, improve product quality, and produce more varieties of seamless bimetallic composite pipes;

[0021] The guide plate of the present invention is provided with an oblique cut. When the end of the composite pipe is composited, the guide plate is moved toward the outlet direction by adjusting the axial position of the guide plate to release the constraint of the guide plate at the end of the composite pipe, thereby avoiding the problem of rolling caused by large deformation of the composite pipe end without subsequent restriction.

[0022] The present invention can accurately detect the position and angle of the guide plate through the No. 1 encoder, No. 2 encoder and the displacement sensor built into the hydraulic cylinder, thereby realizing fast, efficient and high-precision adjustment of the guide plate position parameters, saving operation procedures and greatly improving rolling efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 A schematic diagram of the structure for adjusting a single guide plate of the present invention;

[0025] Figure 3 It is a schematic diagram of the installation of the slide seat and the slide plate in the present invention;

[0026] Figure 4 It is a structural schematic diagram of the frame in the present invention;

[0027] Figure 5 For the present invention Figure 4 A partial enlarged view of the middle circle A;

[0028] In the figure, slide 1, end cover 2, hydraulic motor 3, screw 4, transmission block 5, slide plate 6, guide plate base 7, guide plate 8, pressure plate 9, locking cylinder 10, arc slide block 11, arc slide groove 12, frame 13, arc teeth 14, gear 15, rotating shaft 16, bearing seat 17, bracket 18, motor 19, support plate 20, hydraulic cylinder 21, support frame 22, pad 23, bevel cut 24, roller 25. DETAILED DESCRIPTION

[0029] In order to further illustrate the technical solution of the present invention, the present invention is further described below through embodiments.

[0030] like Figures 1 to 5As shown, a high-efficiency adjustment device for the guide plate of a three-roller oblique rolling mill comprises a slide 1, an end cover 2 is fixedly arranged on the upper end surface of the slide 1, a hydraulic motor 3 is fixed on the upper surface of the end cover 2, the output shaft of the hydraulic motor 3 passes through the end cover 2 and is fixedly connected to a lead screw 4, the lead screw 4 is threadedly connected with a transmission block 5, the transmission block 5 is fixedly connected to a slide plate 6, a clearance hole for making way for the lead screw 4 is opened on the slide plate 6, the slide plate 6 is slidably arranged in the slide 1, a guide plate base 7 is connected to the lower end of the slide plate 6, a guide plate 8 is connected to the lower end of the guide plate base 7, and The end surface of the guide plate 8 in contact with the pipe is provided with an oblique cut 24, and the oblique cut 24 is provided on the side close to the rolling entrance. A pressing plate 9 is fixedly connected to the front end surface of the slide 1 by bolts, and a locking cylinder 10 is connected to the pressing plate 9 by bolts. The movable end of the locking cylinder 10 abuts against the slide plate 6. Arc-shaped sliders 11 are provided on the left and right sides of the slide 1. The arc-shaped sliders 11 are slidably arranged in the arc-shaped slide groove 12. The arc-shaped slide groove 12 is provided on the frame 13. Grooves are provided on the upper and lower arc-shaped surfaces of the arc-shaped slide groove 12. A roller 25 is installed in the groove to reduce the friction between the arc-shaped slider 11 and the arc-shaped slide groove 12. A hydraulic cylinder 21 is arranged at the outer end of the arc-shaped slider 11. The piston rod of the hydraulic cylinder 21 contacts the outer end of the arc-shaped slider 11. The cylinder body of the hydraulic cylinder 21 is installed in a support frame 22. The support frame 22 is fixed to the frame 13 by bolts. A pad 23 is fixedly arranged at the outer end of the arc-shaped slider 11 to increase the contact area between the arc-shaped slider 11 and the hydraulic cylinder 21. Arc-shaped sliders 11 are symmetrically arranged on the left and right sides of the upper surface of the slide seat 1. The arc-shaped slider 11, the arc-shaped slide groove 12 and the arc-shaped tooth 14 are all located on the rolling center line. The arc-shaped tooth 14 is meshed with a gear 15, and the gear 15 is mounted on a rotating shaft 16. The rotating shaft 16 is mounted in two bearing seats 17. The bearing seats 17 are fixedly mounted on a bracket 18. The bracket 18 is fixedly mounted on the frame 13 by bolts. One end of the rotating shaft 16 passes through the frame 13 and is fixedly connected to the output shaft of the motor 19. The motor 19 is fixedly mounted on a support plate 20, and the support plate 20 is fixedly mounted on the frame 13 by bolts.

[0031] An encoder No. 1 and an encoder No. 2 are respectively installed on the output shafts of the hydraulic motor 3 and the motor 19. The encoder No. 1 and the encoder No. 2 are both connected to the control console and are respectively used to detect the displacement distance of the slide plate 6 and the swing angle of the slide seat 1. The hydraulic cylinder 21 is equipped with a displacement sensor for detecting the displacement distance of the slide seat 1. The control console is also connected to the hydraulic motor 3, the locking cylinder 10, the motor 19 and the hydraulic cylinder 21 to control the operation of the hydraulic motor 3, the locking cylinder 10, the motor 19 and the hydraulic cylinder 21.

[0032] An efficient adjustment method for a guide plate of a three-roller skew rolling mill includes radial position adjustment, circumferential position adjustment and axial position adjustment, specifically:

[0033] Radial position adjustment: start the hydraulic motor 3 through the control console, control the hydraulic motor 3 to rotate forward or reverse according to the target position of the guide plate 8, and drive the lead screw 4 to rotate through the hydraulic motor 3. As the lead screw 4 rotates, the transmission block 5 drives the slide plate 6 and the guide plate 8 to move radially from the initial position to the target position. At the same time, the displacement distance of the guide plate 8 is determined by the signal detected by the No. 1 encoder, and then it is determined whether the guide plate 8 has moved to the target position. When the guide plate 8 moves to the target position, the control console controls the hydraulic motor 3 to stop working, and then controls the locking cylinder 10 to extend, locks and fixes the slide plate 6 to ensure its stable position, and completes the adjustment of the radial position of the guide plate 8;

[0034] Circumferential position adjustment: adjust the state of the hydraulic cylinder 21 to the pressure relief state through the control console, start the motor 19, and control the motor 19 to rotate forward or reverse according to the target angle of the guide plate 8, drive the gear 15 to rotate, and the arc-shaped tooth 14 is displaced under the drive of the gear 15, so that the arc-shaped slide block 11 moves along the arc-shaped slide groove 12, and finally realizes the angle adjustment of the guide plate 8. The angle of the guide plate 8 is determined by the signal detected by the second encoder. When it is detected that the guide plate 8 rotates to the target angle, the motor 19 stops working, and the circumferential position adjustment of the guide plate 8 is completed;

[0035] Axial position adjustment: According to the target position of the guide plate 8, the hydraulic cylinder 21 is controlled by the control console to work, thereby pushing the slide 1 to move. During the displacement process, the extension / retraction length of the hydraulic cylinder 21 is detected by the displacement sensor provided by the hydraulic cylinder 21. When it is detected that the guide plate 8 has reached the target position, the arc-shaped slide 11 is locked by the hydraulic cylinder 21 to complete the adjustment of the axial position of the guide plate 8.

[0036] The above shows and describes the main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An efficient adjustment device for a guide plate of a three-roller skew rolling mill, characterized in that: The invention comprises a slide seat (1), an end cover (2) is fixedly arranged on the upper end surface of the slide seat (1), a hydraulic motor (3) is fixed on the upper surface of the end cover (2), an output shaft of the hydraulic motor (3) passes through the end cover (2) and is fixedly connected to a lead screw (4), the lead screw (4) is threadedly connected to a transmission block (5), the transmission block (5) is fixedly connected to a slide plate (6), a clearance hole for making way for the lead screw (4) is opened on the slide plate (6), the slide plate (6) is slidably arranged in the slide seat (1), a guide plate base (7) is connected to the lower end of the slide plate (6), a guide plate (8) is connected to the lower end of the guide plate base (7), a pressure plate (9) is fixedly connected to the front end surface of the slide seat (1) by bolts, a locking oil cylinder (10) is connected to the pressure plate (9) by bolts, the movable end of the locking oil cylinder (10) is in contact with the slide plate (6), and the locking oil cylinder (10) is in contact with the slide plate (6). The left and right sides of the slide seat (1) are both provided with arc-shaped sliders (11), the arc-shaped sliders (11) are slidably arranged in arc-shaped slide grooves (12), the arc-shaped slide grooves (12) are opened on the frame (13), the left and right sides of the upper surface of the slide seat (1) are symmetrically provided with arc-shaped teeth (14), the arc-shaped teeth (14) are meshedly connected with gears (15), the gears (15) are installed on a rotating shaft (16), the rotating shaft (16) is installed in two bearing seats (17), the bearing seats (17) are fixedly installed on a bracket (18), the bracket (18) is fixedly installed on the frame (13) by bolts, one end of the rotating shaft (16) passes through the frame (13) and is fixedly connected to the output shaft of the motor (19), the motor (19) is fixedly installed on a support plate (20), and the support plate (20) is fixedly installed on the frame (13) by bolts.

2. The high-efficiency adjustment device for the guide plate of a three-roller skew rolling mill according to claim 1 is characterized in that: A hydraulic cylinder (21) is provided at the outer end of the arc-shaped slider (11); a piston rod of the hydraulic cylinder (21) contacts the outer end of the arc-shaped slider (11); a cylinder body of the hydraulic cylinder (21) is installed in a support frame (22); and the support frame (22) is fixed to the frame (13) by bolts.

3. The high-efficiency adjustment device for the guide plate of a three-roller skew rolling mill according to claim 2 is characterized in that: A pad (23) is fixedly arranged on the outer end of the arc-shaped sliding block (11) to increase the contact area between the arc-shaped sliding block (11) and the hydraulic cylinder (21).

4. The high-efficiency adjustment device for the guide plate of a three-roller skew rolling mill according to claim 1 is characterized in that: The centers of the arc-shaped slider (11), the arc-shaped slide groove (12) and the arc-shaped teeth (14) are all located on the rolling center line.

5. The high-efficiency adjustment device for the guide plate of a three-roller skew rolling mill according to claim 2, characterized in that: A first encoder and a second encoder are installed on the output shafts of the hydraulic motor (3) and the motor (19), respectively. The first encoder and the second encoder are connected to a control console and are used to detect the displacement distance of the slide plate (6) and the swing angle of the slide seat (1), respectively. The hydraulic cylinder (21) is equipped with a displacement sensor for detecting the displacement distance of the slide seat (1). The control console is also connected to the hydraulic motor (3), the locking cylinder (10), the motor (19) and the hydraulic cylinder (21) and is used to control the operation of the hydraulic motor (3), the locking cylinder (10), the motor (19) and the hydraulic cylinder (21).

6. The high-efficiency adjustment device for the guide plate of a three-roller skew rolling mill according to claim 1, characterized in that: An oblique cut (24) is arranged on the end surface of the guide plate (8) in contact with the pipe, and the oblique cut (24) is arranged on a side close to a rolling inlet.

7. The high-efficiency adjustment device for the guide plate of a three-roller skew rolling mill according to claim 1 is characterized in that: Grooves are provided on the upper and lower arc surfaces of the arc-shaped slide groove (12), and rollers (25) are installed in the grooves to reduce the friction between the arc-shaped slider (11) and the arc-shaped slide groove (12).

8. A method for efficiently adjusting a guide plate of a three-roller cross-rolling mill using the device for efficiently adjusting a guide plate of a three-roller cross-rolling mill as claimed in claim 5, characterized in that: It includes radial position adjustment, circumferential position adjustment and axial position adjustment, specifically: Radial position adjustment: the control console starts the hydraulic motor (3), controls the hydraulic motor (3) to rotate forward or reverse according to the target position of the guide plate (8), and drives the lead screw (4) to rotate through the hydraulic motor (3). As the lead screw (4) rotates, the transmission block (5) drives the slide plate (6) and the guide plate (8) to move radially from the initial position to the target position. At the same time, the displacement distance of the guide plate (8) is determined by the signal detected by the No. 1 encoder, and then it is determined whether the guide plate (8) has moved to the target position. When the guide plate (8) moves to the target position, the control console controls the hydraulic motor (3) to stop working, and then controls the locking cylinder (10) to extend, locks and fixes the slide plate (6), ensures that its position is stable, and completes the adjustment of the radial position of the guide plate (8); Circumferential position adjustment: the state of the hydraulic cylinder (21) is adjusted to a pressure-relief state through the control console, and the motor (19) is started. According to the target angle of the guide plate (8), the motor (19) is controlled to rotate forward or reverse, driving the gear (15) to rotate. The arc-shaped teeth (14) are displaced under the drive of the gear (15), thereby causing the arc-shaped slide block (11) to move along the arc-shaped slide groove (12), and finally achieving the angle adjustment of the guide plate (8). The angle of the guide plate (8) is determined by the signal detected by the second encoder. When it is detected that the guide plate (8) rotates to the target angle, the motor (19) stops working, and the circumferential position adjustment of the guide plate (8) is completed; Axial position adjustment: According to the target position of the guide plate (8), the control console controls the hydraulic cylinder (21) to work, thereby pushing the slide seat (1) to move. During the displacement process, the extension / retraction length of the hydraulic cylinder (21) is detected by the displacement sensor provided in the hydraulic cylinder (21). When it is detected that the guide plate (8) reaches the target position, the hydraulic cylinder (21) is used to lock the arc-shaped slide block (11), thereby completing the adjustment of the axial position of the guide plate (8).

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