An irregular blank radial dynamic servo descaling system and descaling method

Abstract

The application discloses an irregular blank radial dynamic follow-up descaling system and a descaling method, which comprises a rotating platform and a side descaling mechanism; further comprises a distance sensor, a rotating encoder, a sliding box, a driving mechanism and a control unit; the rotating encoder is arranged on the rotating platform; the distance sensor is arranged on one side of the rotating platform and is used for measuring the rotating radius of each point of the blank; the descaling header is vertically arranged on the sliding box, the sliding box is arranged on one side of the rotating platform along the radial direction of the rotating platform, and the driving mechanism is connected with the sliding box; the rotating encoder, the distance sensor and the driving mechanism are all connected with the control unit, so that the rotating platform angular velocity and the rotating radius are transmitted to the control unit and keep one-to-one correspondence, thereby the driving mechanism is controlled by the control unit to drive the horizontal movement of the descaling header. The descaling nozzle changes dynamically along with the irregular blank, so that the distance from the descaling nozzle to the surface of the blank is always kept unchanged, thereby the descaling effect can be effectively ensured.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical engineering technology, and relates to descaling of irregular billets, and particularly to a radial dynamic follow-up descaling system and method for irregular billets. Background Technology

[0002] When metal materials are forged or subjected to thermoplastic forming, they are often heated and held at 1100–1300℃. Under these heating conditions, a dense oxide scale will form on the surface of the billet. If the oxide scale is not completely removed during die forging and is pressed into the billet, pits and depressions will appear on the surface of the billet after cleaning. This will cause the final billet to fail to meet the requirements in terms of precision and roughness, and will also increase the difficulty of subsequent machining. If the oxide scale is pressed into the part inside the billet, the billet will become scrap. In addition, the oxide scale has high hardness, which not only increases the consumption of deformation energy during forging, but also accelerates the wear of the forging die and reduces the service life of the forging die.

[0003] Currently, billet descaling typically involves setting descaling mechanisms at the top and bottom of a descaling box to descale the upper and lower end faces of the forging. Simultaneously, a side descaling mechanism is installed on the side of the descaling box. The billet is placed on a rotating platform located at the center of the bottom of the descaling box, and the rotation of the platform causes the billet to rotate, thereby descaling the sides of the billet. For example, Chinese Patent 202222559821.1 discloses a descaling machine for forgings. However, for irregular billets, the radial length from the outer surface of the billet to the center is inconsistent along the outer circumference. Using the aforementioned descaling machine, the distance from the nozzle to the outer surface of the billet varies, making it impossible to guarantee a satisfactory descaling effect. Summary of the Invention

[0004] To address the aforementioned shortcomings of existing technologies, the present invention aims to provide a radial dynamic follow-up descaling system and method for irregular billets. In this invention, the descaling nozzle dynamically changes radially with the irregular billet, ensuring that the distance between the descaling nozzle and the billet surface remains constant, thereby effectively guaranteeing the descaling effect.

[0005] The technical solution of this invention is implemented as follows:

[0006] A radial dynamic descaling system for irregular billets includes a rotating platform and a side descaling mechanism. The rotating platform is used to place the billet and drive it to rotate. The side descaling mechanism includes a vertically arranged descaling manifold and several nozzles arranged on the descaling manifold. All nozzles are offset at a certain angle in the opposite direction of the billet rotation. The descaling manifold is connected to a high-pressure pipeline through a high-pressure hose to introduce high-pressure water.

[0007] It also includes a distance sensor, a rotary encoder, a sliding housing, a drive mechanism, and a control unit; the rotary encoder is set on the rotating platform and is used to measure the angular velocity of the rotating platform; the distance sensor is set on one side of the rotating platform and is used to obtain the distance from the distance sensor to the center of the billet and to measure the distance of each point on the outer circumferential surface of the billet, thereby obtaining the rotation radius of each point on the outer circumferential surface of the billet.

[0008] The descaling manifold is mounted on a sliding box via several connectors. The sliding box is radially positioned on one side of the rotating platform. The driving mechanism is connected to the sliding box and is used to drive the sliding box to move the descaling manifold horizontally.

[0009] The rotary encoder, distance sensor, and drive mechanism are all connected to the control unit, which facilitates the transmission of the angular velocity and rotation radius of the rotating platform to the control unit and maintains a one-to-one correspondence. Thus, the control unit controls the drive mechanism to move the descaling manifold horizontally, ensuring that the distance between the descaling manifold and the outer surface of the billet remains constant.

[0010] Furthermore, the high-pressure hose includes a first high-pressure hose and a second high-pressure hose. The first high-pressure hose is mounted on a hose support, and the second high-pressure hose is mounted on a sliding box. The first high-pressure hose and the second high-pressure hose are connected by a water inlet seat mounted on the sliding box. One end of the first high-pressure hose is connected to the high-pressure pipeline, and the other end is connected to the water inlet seat. One end of the second high-pressure hose is connected to the water inlet seat, and the other end is connected to the descaling manifold.

[0011] A slide rail is provided at the bottom of the sliding box to facilitate horizontal movement of the sliding box along the slide rail. At the same time, the end of the hose bracket close to the sliding box is connected to the sliding box, and the bottom of the end away from the sliding box is provided with rollers to facilitate horizontal movement of the hose bracket with the sliding box.

[0012] Furthermore, the driving mechanism is a hydraulic cylinder or a servo motor.

[0013] A radial dynamic follow-up descaling method for irregular billets, employing the aforementioned radial dynamic follow-up descaling system for irregular billets, specifically includes the following steps:

[0014] S1: Place the billet vertically on the rotating platform so that the axial center of the billet coincides with the rotation center of the rotating platform;

[0015] S2: Use a distance sensor to obtain the distance L from the distance sensor to the center of the billet. Take several control points evenly on the outer surface of the billet. Rotate the rotating platform one revolution and use the distance sensor to obtain the distance L from the distance sensor to each control point on the outer surface of the billet. i Where i takes values ​​of 0, 1, 2, 3, ..., thus obtaining the radius of rotation R of each control point on the outer surface of the billet. i, where R i =LL i At the same time, the rotation angle of the rotating platform is matched one-to-one with the rotation radius of all control points;

[0016] S3: Rotate the rotating platform so that the control point corresponding to the maximum or minimum rotation radius of the outer surface of the billet is located on the straight line between the nozzle and the rotating platform as the injection start point. At the same time, the rotation radius corresponding to the control point is assigned the value R0, and the rotation platform angle is assigned the value 0°. The rotation radius and rotation platform angle corresponding to other control points are adjusted sequentially according to the injection sequence.

[0017] S4: Based on the difference R between the rotation radii of the next control point and the previous control point. n -R n-1 The rotation speed of the rotating platform is controlled to adjust the horizontal movement speed of the drive mechanism until the rotating platform completes one revolution to remove scales.

[0018] Furthermore, the error between the axial center of the blank and the rotation center of the rotating platform is ≤50mm.

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

[0020] In this invention, the axis of the descaling manifold is set parallel to the rotation center of the billet. During the rotation of the billet, the descaling manifold can move horizontally according to the outer surface of the billet under the action of the driving mechanism, so that the descaling nozzle changes dynamically with the radial direction of the irregular billet, and the distance between the descaling nozzle and the outer surface of the billet remains constant at all times. This ensures that the impact force of the high-pressure water sprayed from the nozzle on the surface of the billet is always consistent, thus ensuring the descaling effect. Attached Figure Description

[0021] Figure 1 - A schematic diagram of the descaling system described in this invention.

[0022] Figure 2 - A top view of the descaling system described in this invention.

[0023] Figure 3 - Top view of the billet.

[0024] Figure 4 - A curve showing the variation of the billet's rotation radius from 0 to 360°.

[0025] Wherein: 1-rotating platform; 2-bill; 3-descaling manifold; 4-connecting pin; 5-second high-pressure hose; 6-sliding box; 7-water inlet seat; 8-first high-pressure hose; 9-hose bracket; 10-hydraulic cylinder; 11-hydraulic cylinder seat; 12-first anchor bolt; 13-second anchor bolt; 14-slide rail; 15-annular drainage ditch; 16-distance sensor. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0027] See Figure 1 and Figure 2 A radial dynamic descaling system for irregular billets includes a rotating platform 1 and a side descaling mechanism. The rotating platform 1 is used to place the billet 2 and drive the billet 2 to rotate. The side descaling mechanism includes a vertically arranged descaling manifold 3 and several nozzles arranged on the descaling manifold 3. All nozzles are offset at a certain angle in the opposite direction of the billet rotation direction. The descaling manifold 3 is connected to a high-pressure pipeline through a high-pressure hose to introduce high-pressure water.

[0028] It also includes a distance sensor 16, a rotary encoder (not shown in the figure), a sliding housing 6, a drive mechanism, and a control unit; the rotary encoder is set on the rotating platform 1 and is used to measure the angular velocity of the rotating platform; the distance sensor 16 is set on one side of the rotating platform and is used to obtain the distance from the distance sensor 16 to the center of the billet 2 and to measure the distance of each point on the outer circumferential surface of the billet 2, thereby obtaining the rotation radius of each point on the outer circumferential surface of the billet 2.

[0029] The descaling manifold 4 is mounted on the sliding housing 6 via several connecting pins 4. The sliding housing 6 is radially mounted on one side of the rotating platform 1. The driving mechanism is connected to the sliding housing 6 and is used to drive the sliding housing 6 to move the descaling manifold 4 horizontally.

[0030] The rotary encoder, distance sensor 16, and drive mechanism are all connected to the control unit, which facilitates the transmission of the angular velocity and rotation radius of the rotating platform 1 to the control unit and maintains a one-to-one correspondence. Thus, the control unit controls the drive mechanism to drive the descaling manifold 3 to move horizontally, so that the distance between the descaling manifold 3 and the outer circumferential surface of the blank 2 remains constant.

[0031] In this embodiment, the driving mechanism is a hydraulic cylinder 10, which is mounted on the foundation via a hydraulic cylinder seat 11. The hydraulic cylinder seat is mounted on the foundation via a first anchor bolt. In practical applications, a servo motor or other device capable of driving the sliding box to perform linear motion can also be selected as the driving mechanism. During application, an annular drainage ditch 15 is provided at the bottom of the rotating platform to drain descaling water.

[0032] The rotating platform is driven by a motor. A rotary encoder is mounted on the motor shaft to measure the motor speed. The motor transmits power through a gear pair, driving the rotating platform. If the transmission ratio between the motor and the gear pair is f, the motor speed is N. 电 Then the rotational speed N of the rotating platform 旋 =N 电 f, thus the rotational speed of the rotating platform can be obtained through the rotary encoder.

[0033] In this way, the axis of the descaling manifold is set parallel to the rotation center of the billet. As the billet rotates, the descaling nozzle dynamically changes radially with the irregular billet, ensuring that the distance between the descaling nozzle and the outer surface of the billet remains constant. This ensures that the impact force of the high-pressure water sprayed from the nozzle on the surface of the billet remains consistent, thus guaranteeing the descaling effect.

[0034] In specific implementation, the high-pressure hose includes a first high-pressure hose 8 and a second high-pressure hose 5. The first high-pressure hose 8 is supported on the hose bracket 9, and the second high-pressure hose 5 is mounted on the sliding box 6. The first high-pressure hose 8 and the second high-pressure hose 5 are connected by a water inlet seat 7 mounted on the sliding box 6. One end of the first high-pressure hose 8 is connected to the high-pressure pipeline, and the other end is connected to the water inlet seat 7. One end of the second high-pressure hose 5 is connected to the water inlet seat 7, and the other end is connected to the descaling manifold 3.

[0035] A slide rail 14 is provided at the bottom of the sliding box 6 to facilitate the horizontal movement of the sliding box 6 along the slide rail 14. At the same time, the end of the hose bracket 9 close to the sliding box 6 is connected to the sliding box 6, and the bottom of the end away from the sliding box 6 is provided with rollers to facilitate the horizontal movement of the hose bracket 9 with the sliding box 6.

[0036] A radial dynamic follow-up descaling method for irregular billets, employing the aforementioned radial dynamic follow-up descaling system for irregular billets, specifically includes the following steps:

[0037] S1: Place the billet vertically on the rotating platform so that the axial center of the billet coincides with the rotation center of the rotating platform.

[0038] S2: Use a distance sensor to obtain the distance L from the distance sensor to the center of the billet. Take several control points evenly on the outer surface of the billet. Rotate the rotating platform one revolution and use the distance sensor to obtain the distance L from the distance sensor to each control point on the outer surface of the billet. n Where n takes the values ​​0, 1, 2, 3, ..., thus obtaining the radius of rotation R of each control point on the outer surface of the billet. n , where R n =LL n At the same time, the rotation angle of the rotating platform is matched one-to-one with the rotation radius of all control points.

[0039] In step S2, control points can be set on the outer surface of the billet according to the accuracy requirements. All control points are evenly distributed along the circumferential direction, and the difference in circumferential angle between two adjacent control points is equal. The more control points set, the higher the accuracy. In one embodiment, such as Figure 3 As shown, 51 control points were taken on the billet, corresponding to rotation radii of R0 to R10. 50The circumferential angles of two adjacent control points differ by 7.2°. The rotation platform angle and rotation radius corresponding to each control point are shown in the table below:

[0040]

[0041] Meanwhile, the curve showing the variation of the rotation radius between 0 and 360 degrees is as follows: Figure 4 As shown.

[0042] S3: Rotate the rotating platform so that the control point corresponding to the maximum or minimum rotation radius of the outer surface of the billet is located on the straight line between the nozzle and the rotating platform as the injection start point. At the same time, assign the rotation radius corresponding to the control point to R0 and the rotation platform angle to 0°. The rotation radius and rotation platform angle corresponding to other control points are adjusted sequentially according to the injection sequence.

[0043] For example, in one embodiment, the first control point (0°) corresponds to a rotation radius of 450mm; the second control point (45°) corresponds to a rotation radius of 500mm; the third control point (90°) corresponds to a rotation radius of 420mm; the fourth control point (135°) corresponds to a rotation radius of 560mm; the fifth control point (180°) corresponds to a rotation radius of 600mm; the sixth control point (225°) corresponds to a rotation radius of 560mm; the seventh control point (270°) corresponds to a rotation radius of 480mm; the eighth control point (315°) corresponds to a rotation radius of 590mm; and the ninth control point (360°) corresponds to a rotation radius of 450mm. The corresponding relationships are shown in the table below.

[0044] Serial Number 0 1 2 3 4 5 6 7 8 Angle / ° 0 45 90 135 180 225 270 315 360 Rn / mm 450 500 420 560 600 560 480 590 450

[0045] At this point, either the third or fifth control point can be selected as the injection start point. When the third control point is the injection start point, the rotation platform angle corresponding to the third control point is redefined as 0°, resulting in the following: First control point: 0° corresponds to a rotation radius of 420mm; Second control point: 45° corresponds to a rotation radius of 560mm; Third control point: 90° corresponds to a rotation radius of 600mm; Fourth control point: 135° corresponds to a rotation radius of 560mm; Fifth control point: 180° corresponds to a rotation radius of 480mm; Sixth control point: 225° corresponds to a rotation radius of 590mm; Seventh control point: 270° corresponds to a rotation radius of 450mm; Eighth control point: 315° corresponds to a rotation radius of 500mm; Ninth control point: 360° corresponds to a rotation radius of 400mm. The reassigned values ​​are shown in the table below.

[0046] Serial Number 0 1 2 3 4 5 6 7 8 Angle / ° 0 45 90 135 180 225 270 315 360 Rn / mm 420 560 600 560 480 590 450 500 420

[0047] When the fifth control point is the injection start point, the rotation platform angle corresponding to the fifth control point is redefined as 0°, thus becoming: First control point: 0° corresponds to a rotation radius of 600mm; Second control point: 45° corresponds to a rotation radius of 560mm; Third control point: 90° corresponds to a rotation radius of 480mm; Fourth control point: 135° corresponds to a rotation radius of 590mm; Fifth control point: 180° corresponds to a rotation radius of 450mm; Sixth control point: 225° corresponds to a rotation radius of 500mm; Seventh control point: 270° corresponds to a rotation radius of 420mm; Eighth control point: 315° corresponds to a rotation radius of 560mm; Ninth control point: 360° corresponds to a rotation radius of 600mm. The reassigned values ​​are shown in the table below:

[0048] Serial Number 0 1 2 3 4 5 6 7 8 Angle / ° 0 45 90 135 180 225 270 315 360 Rn / mm 600 560 480 590 450 500 420 560 600

[0049] S4: Based on the difference R between the rotation radii of the next control point and the previous control point. n -R n-1 The rotation speed of the rotating platform is controlled to adjust the horizontal movement speed of the drive mechanism until the rotating platform completes one revolution to remove scales.

[0050] When R n -R n-1 When R is positive, the descaling manifold moves away from the rotating platform. n -R n-1 When the value is positive, the descaling manifold moves toward the rotating platform.

[0051] In practice, the error between the axial center of the blank and the rotation center of the rotating platform is ≤50mm.

[0052] Finally, it should be noted that the above embodiments of the present invention are merely illustrative examples and not intended to limit the implementation of the invention. Those skilled in the art can make other variations and modifications based on the above description. It is impossible to exhaustively list all possible implementations here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A radial dynamic descaling system for irregular billets, comprising a rotating platform and a side descaling mechanism, wherein the rotating platform is used to place the billet and drive it to rotate, and the side descaling mechanism includes a vertically arranged descaling manifold and a plurality of nozzles arranged on the descaling manifold, all nozzles being offset at a certain angle in the opposite direction of the billet rotation; the descaling manifold is connected to a high-pressure pipeline via a high-pressure hose to introduce high-pressure water, characterized in that: It also includes a distance sensor, a rotary encoder, a sliding housing, a drive mechanism, and a control unit; the rotary encoder is mounted on the rotating platform and is used to measure the angular velocity of the rotating platform. The distance sensor is set on one side of the rotating platform to obtain the distance from the distance sensor to the center of the billet and to measure the distance of each point on the outer circumferential surface of the billet, thereby obtaining the rotation radius of each point on the outer circumferential surface of the billet; The descaling manifold is mounted on a sliding box via several connectors. The sliding box is radially mounted on one side of the rotating platform. The driving mechanism is connected to the sliding box and is used to drive the sliding box to move the descaling manifold horizontally. The rotary encoder, distance sensor, and drive mechanism are all connected to the control unit, which facilitates the transmission of the angular velocity and rotation radius of the rotating platform to the control unit and maintains a one-to-one correspondence. Thus, the control unit controls the drive mechanism to move the descaling manifold horizontally, ensuring that the distance between the descaling manifold and the outer surface of the billet remains constant.

2. The radial dynamic follow-up descaling system for irregular billets according to claim 1, characterized in that: The high-pressure hose includes a first high-pressure hose and a second high-pressure hose. The first high-pressure hose is mounted on a hose support, and the second high-pressure hose is mounted on a sliding box. The first high-pressure hose and the second high-pressure hose are connected by a water inlet seat mounted on the sliding box. One end of the first high-pressure hose is connected to the high-pressure pipeline, and the other end is connected to the water inlet seat. One end of the second high-pressure hose is connected to the water inlet seat, and the other end is connected to the descaling manifold. A slide rail is provided at the bottom of the sliding box to facilitate horizontal movement of the sliding box along the slide rail. At the same time, the end of the hose bracket close to the sliding box is connected to the sliding box, and the bottom of the end away from the sliding box is provided with rollers to facilitate horizontal movement of the hose bracket with the sliding box.

3. A radial dynamic follow-up descaling system for irregular billets according to claim 1 or 2, characterized in that: The drive mechanism is a hydraulic cylinder or a servo motor.

4. A radial dynamic descaling method for irregular billets, characterized in that: Descaling of irregular billets using a radial dynamic follow-up descaling system as described in any one of claims 1 to 3 specifically includes the following steps: S1: Place the billet vertically on the rotating platform so that the axial center of the billet coincides with the rotation center of the rotating platform; S2: Use a distance sensor to obtain the distance from the distance sensor to the center of the billet. L Several control points are evenly selected on the outer surface of the billet. The rotating platform is rotated one revolution, and the distance from the distance sensor to each control point on the outer surface of the billet is obtained using a distance sensor. L i ,in i By selecting values ​​of 0, 1, 2, 3, ..., the rotation radius of each control point on the outer surface of the billet can be obtained. R i ,in R i =L- L i At the same time, the rotation angle of the rotating platform is matched one-to-one with the rotation radius of all control points; S3: Rotate the rotating platform so that the control point corresponding to the maximum or minimum rotation radius of the billet's outer surface is located on the straight line between the nozzle and the rotating platform, serving as the injection starting point. Simultaneously, assign a value to the rotation radius corresponding to this control point. R 0 The rotation platform angle is set to 0°, and the rotation radius and rotation platform angle of other control points are adjusted accordingly in the order of spraying. S4: Based on the difference in rotation radius between the next control point and the previous control point R n - R n-1 The rotation speed of the rotating platform is controlled to adjust the horizontal movement speed of the drive mechanism until the rotating platform completes one revolution to remove scales.

5. The radial dynamic descaling method for irregular billets according to claim 4, characterized in that: The error between the axial center of the billet and the rotation center of the rotating platform is ≤50 mm.

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