Rolling mill for eliminating lug shape at tail part of finished product

Abstract

The invention discloses a rolling mill for eliminating tail lug shapes of finished products, and belongs to the technical field of rolling mills. The supporting frame is connected with an adjustable rolling assembly. The adjustable rolling assembly comprises a high-inertia double-shaft driving assembly, a synchronous adjusting supporting assembly and rollers, the high-inertia double-shaft driving assembly is fixedly connected with the base, the rollers are fixedly connected to the output ends of the high-inertia double-shaft driving assembly, and the synchronous adjusting supporting assembly is fixedly installed on the supporting frame. The rollers are sequentially and rotationally installed in the synchronous adjusting and supporting assembly from top to bottom. The support frame is provided with a guide component on the roller; by means of the mode, the influence of external stress on the metal bars is reduced, the steel stacking amount is reduced, the purpose of eliminating lug shapes is achieved, and meanwhile the synchronous detection device is suitable for being used for the metal bars of different sizes.

Description

Technical Field

[0001] The invention relates to the technical field of rolling mills, in particular to a rolling mill capable of eliminating the ear shape at the tail of a finished product. Background Art

[0002] When metal bars are formed, they need to be rolled using a horizontal rolling mill.

[0003] For example, Chinese patent CN216369504U discloses a new type of cold rolling mill for producing round steel. Its technical solution includes: a bottom plate and a tool table, a base is fixed in the middle of the upper surface of the bottom plate, a cold rolling mill body is fixed on the base, load-bearing rollers are rotatably installed at the upper and lower ends of the cold rolling mill body, two working rollers are rotatably installed inside the cold rolling mill body between the two load-bearing rollers, a drive chassis is fixed on one side of the upper surface of the bottom plate, two transmission shafts are rotatably installed on the upper side of the drive chassis, one end of the two transmission shafts is respectively fixed to one end of the two working rollers, a vertical plate is fixed on the front end of one side of the upper surface of the bottom plate, a lead screw is embedded in the middle of the front of the two vertical plates, and the lead screw is movably connected to the middle of the rear end of the tool table. It has the advantages of moving the tool table to the height of the cold rolling mill body for maintenance, and directly taking tools and spare parts in parallel during maintenance, which is convenient for maintenance.

[0004] Although the above structure is used for rolling and forming bars, the inertia of the motor of the front frame of the finished product is currently too small, and the motor reacts quickly to the influence of external forces, resulting in a decrease in the force before the tail of the steel is removed, which increases the speed of the rolling mill, resulting in a 5 cm long ear-shaped protrusion about 4 meters before the tail of the finished bar, affecting the overall quality. At the same time, there is no equipment for inspecting the appearance quality of the rollers, and defective products are likely to occur if damage to the rollers is not discovered in time.

[0005] Based on this, the present invention designs a rolling mill that eliminates the ear shape at the tail of the finished product to solve the above problem. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a rolling mill for eliminating the ear shape at the tail of the finished product.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A rolling mill for eliminating the tail ear of a finished product, comprising a base located in a precision unit: A support frame is connected to the top of the base; An adjustable rolling assembly for processing metal bars and having adjustable spacing between forming parts is connected to the support frame; The adjustable rolling assembly includes a high-inertia dual-axis drive assembly, a synchronous adjustment support assembly and a roller. The high-inertia dual-axis drive assembly is fixedly connected to the base, and the output ends of the high-inertia dual-axis drive assembly are fixedly connected to the roller. The synchronous adjustment support assembly is fixedly installed on the support frame, and the roller is installed in the synchronous adjustment support assembly in sequence from top to bottom. The support frame is connected with a guide assembly for guiding the metal bar at the feed end of the roller; The support frame is connected with a synchronous detection component for quality detection of the roller forming part at the roller discharge end, and the synchronous detection component and the detection end are flush with the central axis of the roller.

[0008] Furthermore, the high inertia dual-shaft drive assembly includes a connecting shaft, a cross coupling, a dual-output shaft reducer and a drive motor. The dual-output shaft reducer and the drive motor are both installed on the top of the base. The driving end of the drive motor is fixedly connected to the input end of the dual-output shaft reducer. Both ends of the connecting shaft are fixedly connected with a cross coupling. The end of the connecting shaft close to the dual-output shaft reducer is connected to the output end of the dual-output shaft reducer and the roller through the cross coupling.

[0009] Furthermore, the motor inertia of the drive motor is 176Kg·m².

[0010] Furthermore, the synchronous adjustment support assembly includes a top cover, a second motor, a movable seat, a symmetrical threaded rod, a first rotating shaft, a straight shaft, a first gear ring, a first worm wheel, a first worm and a second gear ring. The left end of the support frame is symmetrically provided with a movable seat, and the front and rear ends of the movable seat are threadedly connected to the symmetrical threaded rod through a threaded sleeve. The top of the symmetrical threaded rod is fixedly connected to the first gear ring. The top cover is fixedly installed on the top of the support frame, and the second motor is fixedly installed on the outer wall of the top cover. The driving end of the second motor passes through the top cover and is fixedly connected to the first rotating shaft, and the first rotating shaft is symmetrically fixedly connected to the first worm, and the first worm is meshingly connected to the first worm wheel. A straight shaft is installed in the mounting hole of the first worm wheel, and the lower end of the straight shaft is fixedly connected to the second gear ring, the second gear ring is meshingly connected to the two groups of first gear rings on its corresponding side, and the straight shaft is rotatably installed on the top of the support frame through a bearing.

[0011] Furthermore, the guide assembly includes a first motor, a first threaded rod, a first guide rod, a guide hole and a guide seat. The first motor is fixedly mounted on the side wall of the support frame. The driving end of the first motor passes through the support frame and is fixedly connected to the first threaded rod. The first threaded rod is rotatably connected to the left and right inner walls of the support frame through a bearing. The guide seat is threadedly connected to the first threaded rod through a threaded sleeve. The guide seat is provided with a guide hole for guiding. The lower end of the guide seat is slidably connected to the first guide rod through a sliding hole, and both ends of the first guide rod are fixedly connected to the left and right inner walls of the support frame. The end of the first guide rod away from the support frame is arranged toward the pre-finishing mill unit.

[0012] Furthermore, the synchronous detection component includes a synchronous drive component and an ultrasonic probe. The synchronous drive component is installed at the end of the support frame away from the pre-finishing rolling mill group, and the synchronous drive component is symmetrically connected to the ultrasonic probe for detection.

[0013] Furthermore, the synchronous drive assembly includes a second threaded rod, a sliding seat, a second guide rod, a second rotating shaft, a third motor, a second worm gear and a second worm. A third motor is installed on the side wall of the support frame. The driving end of the third motor is fixedly connected to the second rotating shaft. The second rotating shaft is symmetrically fixedly connected to the second worm gear up and down. The second worm gear is meshingly connected to the second worm gear. A second threaded rod is installed in the mounting hole of the second worm gear. The sliding seat is threadedly connected to the second threaded rod through a threaded sleeve. The sliding seat is slidably connected to the second guide rod through a sliding hole. Both ends of the second threaded rod are rotatably connected to the inner wall of the support frame. Both ends of the second guide rod are fixedly connected to the inner wall of the support frame, and the ultrasonic probe is fixedly installed in the mounting hole of the sliding seat.

[0014] Furthermore, the upper and lower ends of the second rotating shaft are fixedly connected to the supporting frame via a rotatably connected supporting seat.

[0015] Beneficial effect: According to the diameter of the metal bar, the synchronous adjustment support component of the adjustable rolling component of the present invention adjusts the distance between the two groups of rollers so that the distance between the rollers matches the diameter of the metal bar. The high-inertia dual-axis drive component drives the two groups of rollers to rotate in opposite directions. The metal bar rolled by the pre-finishing rolling unit enters the rollers through the guide component. The rollers roll the metal bar. The high-inertia dual-axis drive component increases the roller speed to reduce the influence of external forces on the metal bar, thereby reducing the amount of steel piling and achieving the purpose of eliminating the ear shape. At the same time, it is suitable for use with metal bars of different sizes. In addition, the quality of the roller surface is inspected by the synchronous detection component, and the damage of the roller surface is discovered in time to avoid the production of defective products and ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A rolling mill three-dimensional method for eliminating the ear shape of the finished product tail Figure 1 ; Figure 2 A front view of a rolling mill for eliminating the tail ear of a finished product according to the present invention; Figure 3 A rolling mill three-dimensional method for eliminating the ear shape of the finished product tail Figure 2 ; Figure 4 A rolling mill three-dimensional method for eliminating the ear shape of the finished product tail Figure 3 ; Figure 5 A rolling mill three-dimensional method for eliminating the ear shape of the finished product tail Figure 4 ; Figure 6 For along Figure 2 AA direction section Figure 1 ; Figure 7 For along Figure 2 AA direction section Figure 2 .

[0018] The numbers in the figure represent: 1. Base 2. Guide assembly 21. First motor 22. First threaded rod 23. First guide rod 24. Guide hole 25. Guide seat 3. Support frame 4. Adjustable rolling assembly 41. Top cover 42. Roller 43. Connecting shaft 44. Cross coupling 45. Double output shaft reducer 46. Drive motor 47. Second motor 48. Movable seat 49. Symmetrical threaded rod 410. First rotating shaft 411. Straight shaft 412. First gear ring 413. First worm gear 414. First worm 415. Second gear ring 5. Synchronous detection assembly 51. Second threaded rod 52. Sliding seat 53. Second guide rod 54. Second rotating shaft 55. Third motor 56. Second worm gear 57. Second worm 58. Ultrasonic probe. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The present invention will be further described below in conjunction with the embodiments.

[0021] For example, see Figure 1-Figure 7 , a rolling mill for eliminating the ear shape of the finished product tail, comprising a base 1 located in a precision unit: A support frame 3 is connected to the top of the base 1; The support frame 3 is connected with an adjustable rolling assembly 4 for processing metal bars and having adjustable spacing between forming parts; The adjustable rolling assembly 4 includes a high-inertia dual-axis drive assembly, a synchronous adjustment support assembly and a roller 42. The high-inertia dual-axis drive assembly is fixedly connected to the base 1, and the output ends of the high-inertia dual-axis drive assembly are fixedly connected to the roller 42. The synchronous adjustment support assembly is fixedly installed on the support frame 3, and the roller 42 is rotated and installed in the synchronous adjustment support assembly from top to bottom. The support frame 3 is connected with a guide assembly 2 for guiding the metal bar at the feed end of the roller 42; The support frame 3 is connected to a synchronous detection component 5 for detecting the quality of the forming part of the roller 42 at the discharge end of the roller 42, and the synchronous detection component 5 and the detection end are flush with the central axis of the roller 42; The rolling mill is a horizontal rolling mill before the finished product; According to the diameter of the metal bar, the synchronous adjustment support component of the adjustable rolling component 4 adjusts the distance between the two groups of rollers 42 so that the distance between the rollers 42 conforms to the diameter of the metal bar. The high inertia dual-axis drive component drives the two groups of rollers 42 to rotate in opposite directions. The metal bar is rolled by the pre-finishing mill and enters the roller 42 through the guide component 2. The roller 42 rolls the metal bar. The high inertia dual-axis drive component increases the speed of the roller 42 so that the metal bar is less affected by the external force, thereby reducing the amount of steel pile and achieving the purpose of eliminating the ear shape. At the same time, it is suitable for the use of metal bars of different sizes. In addition, the synchronous detection component 5 performs quality inspection on the surface of the roller 42 to timely detect damage on the surface of the roller 42, avoid the production of defective products, and ensure product quality. The high inertia dual-axis drive assembly includes a connecting shaft 43, a cross coupling 44, a dual-output shaft reducer 45 and a drive motor 46. The dual-output shaft reducer 45 and the drive motor 46 are both installed on the top of the base 1. The driving end of the drive motor 46 is fixedly connected to the input end of the dual-output shaft reducer 45. The two ends of the connecting shaft 43 are fixedly connected with the cross coupling 44. The end of the connecting shaft 43 close to the dual-output shaft reducer 45 is connected to the output end of the dual-output shaft reducer 45 and the roller 42 through the cross coupling 44. The motor inertia of the drive motor 46 is 176 kg·m²; The synchronous adjustment support assembly includes a top cover 41, a second motor 47, a movable seat 48, a symmetrical threaded rod 49, a first rotating shaft 410, a straight shaft 411, a first gear ring 412, a first worm wheel 413, a first worm 414 and a second gear ring 415. The left end of the support frame 3 is symmetrically provided with a movable seat 48, and the front and rear ends of the movable seat 48 are threadedly connected to the symmetrical threaded rod 49 through a threaded sleeve. The top of the symmetrical threaded rod 49 is fixedly connected with the first gear ring 412. The top cover 41 is fixedly installed on the top of the support frame 3, and the second motor 47 is fixedly installed. Installed on the outer wall of the top cover 41, the driving end of the second motor 47 passes through the top cover 41 and is fixedly connected to the first rotating shaft 410, and the first rotating shaft 410 is fixedly connected with the first worm 414 in a left-right symmetrical manner, the first worm 414 is meshedly connected with the first worm wheel 413, a straight shaft 411 is installed in the mounting hole of the first worm wheel 413, and the lower end of the straight shaft 411 is fixedly connected with the second gear ring 415, the second gear ring 415 is meshedly connected with the two sets of first gear rings 412 on the corresponding side, and the straight shaft 411 is rotatably installed on the top of the support frame 3 through a bearing; The support frame 3 is rotatably connected to the symmetrical threaded rod 49 via a bearing; The first rotating shaft 410 is rotatably connected to the top cover 41 via a bearing; According to the diameter of the metal bar, the second motor 47 of the synchronous adjustment support assembly of the adjustable rolling assembly 4 drives the first rotating shaft 410 to rotate, the first rotating shaft 410 drives the first worm 414 to rotate, the first worm 414 drives the first worm wheel 413 to rotate, the first worm wheel 413 drives the straight shaft 411 to rotate, the straight shaft 411 drives the second gear ring 415 to rotate, the second gear ring 415 drives the symmetrical threaded rod 49 to rotate, the symmetrical threaded rod 49 drives the movable seat 48 to move, the movable seat 48 drives the roller 42 to move, adjust the spacing between the two groups of rollers 42 so that the spacing between the rollers 42 matches the diameter of the metal bar, and then turn the driving motor 47 to rotate. The motor inertia of the machine 46 is adjusted to 176Kg·m², the driving motor 46 of the high-inertia dual-axis drive assembly drives the dual-output shaft reducer 45 to rotate, the dual-output shaft reducer 45 drives the connecting shaft 43 to rotate through the cross coupling 44, the connecting shaft 43 drives the two sets of rollers 42 to rotate in the opposite direction, the metal bars rolled by the pre-finishing mill group pass through the guide assembly 2 and enter the roller 42, the roller 42 rolls the metal bars, the high-inertia dual-axis drive assembly increases the speed of the roller 42, so that the metal bars are less affected by the external force, so as to reduce the amount of steel pile, achieve the purpose of eliminating the ear shape, and adapt to the use of metal bars of different sizes; The guide assembly 2 includes a first motor 21, a first threaded rod 22, a first guide rod 23, a guide hole 24 and a guide seat 25. The first motor 21 is fixedly installed on the side wall of the support frame 3. The driving end of the first motor 21 passes through the support frame 3 and is fixedly connected to the first threaded rod 22. The first threaded rod 22 is rotatably connected to the left and right inner walls of the support frame 3 through a bearing. The guide seat 25 is threadedly connected to the first threaded rod 22 through a threaded sleeve. The guide seat 25 is provided with a guide hole 24 for guiding. The lower end of the guide seat 25 is slidably connected to the first guide rod 23 through a sliding hole, and the two ends of the first guide rod 23 are fixedly connected to the left and right inner walls of the support frame 3; the end of the first guide rod 23 away from the support frame 3 is arranged toward the pre-finishing rolling unit; According to the rolling position of the roller 42, the first motor 21 of the guide assembly 2 drives the first threaded rod 22 to rotate, the first threaded rod 22 drives the guide seat 25 to move along the first guide rod 23, and the guide seat 25 drives the guide hole 24 to move to the corresponding position, and the metal bar enters the roller 42 through the guide hole 24, which is convenient for adjusting to different positions for guiding processing; The synchronous detection component 5 includes a synchronous drive component and an ultrasonic probe 58. The synchronous drive component is installed at the end of the support frame 3 away from the pre-finishing mill group. The synchronous drive component is symmetrically connected to the ultrasonic probe 58 for detection. The synchronous drive assembly includes a second threaded rod 51, a sliding seat 52, a second guide rod 53, a second rotating shaft 54, a third motor 55, a second worm gear 56 and a second worm 57. The third motor 55 is installed on the side wall of the support frame 3. The driving end of the third motor 55 is fixedly connected to the second rotating shaft 54. The second rotating shaft 54 ​​is symmetrically fixedly connected to the second worm 57. The second worm 57 is meshedly connected to the second worm gear 56. The second threaded rod 51 is installed in the mounting hole of the second worm gear 56. The sliding seat 52 is threadedly connected to the second threaded rod 51 through a threaded sleeve. The sliding seat 52 is slidably connected to the second guide rod 53 through a sliding hole. Both ends of the second threaded rod 51 are rotatably connected to the inner wall of the support frame 3. Both ends of the second guide rod 53 are fixedly connected to the inner wall of the support frame 3, and the ultrasonic probe 58 is fixedly installed in the mounting hole of the sliding seat 52. The upper and lower ends of the second rotating shaft 54 ​​are fixedly connected to the supporting frame 3 through a rotatably connected supporting seat; The third motor 55 drives the second rotating shaft 54 ​​to rotate, the second rotating shaft 54 ​​drives the second worm 57 to rotate, the second worm 57 drives the second worm wheel 56 to rotate, the second worm wheel 56 drives the second threaded rod 51 to rotate, the second threaded rod 51 drives the sliding seat 52 to move along the second guide rod 53, the sliding seat 52 drives the ultrasonic probe 58 to move to the position to be detected, when the data detected by the ultrasonic probe 58 is in a constant state, it means that the sliding seat 52 is in good condition, and the data detected by the ultrasonic probe 58 fluctuates, which means that the sliding seat 52 is in an abnormal state, which means that the forming part of the roller 42 is damaged, and it needs to be replaced or repaired.

[0022] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will 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 rolling mill for eliminating the ear shape at the tail of a finished product, comprising a base (1) located in a precision unit, characterized in that: The top of the base (1) is connected to a support frame (3); An adjustable rolling assembly (4) for processing metal bars and having adjustable spacing between forming parts is connected to the support frame (3); The adjustable rolling assembly (4) comprises a high-inertia dual-axis drive assembly, a synchronously adjustable support assembly and a roller (42); the high-inertia dual-axis drive assembly is fixedly connected to the base (1); the output ends of the high-inertia dual-axis drive assembly are fixedly connected to the roller (42); the synchronously adjustable support assembly is fixedly mounted on the support frame (3); and the roller (42) is rotatably mounted in the synchronously adjustable support assembly from top to bottom. The support frame (3) is connected to a guide assembly (2) for guiding the metal bar at the feed end of the roller (42); The support frame (3) is connected to a synchronous detection component (5) for detecting the quality of the forming part of the roller (42) at the discharge end of the roller (42), and the synchronous detection component (5) and the detection end are flush with the central axis of the roller (42).

2. The rolling mill for eliminating the tail ear of the finished product according to claim 1, characterized in that: The high-inertia dual-axis drive assembly comprises a connecting shaft (43), a cross coupling (44), a dual-output shaft reducer (45) and a drive motor (46). The dual-output shaft reducer (45) and the drive motor (46) are both mounted on the top of the base (1). The drive end of the drive motor (46) is fixedly connected to the input end of the dual-output shaft reducer (45). Both ends of the connecting shaft (43) are fixedly connected to the cross coupling (44). The end of the connecting shaft (43) close to the dual-output shaft reducer (45) is connected to the output end of the dual-output shaft reducer (45) and the roller (42) through the cross coupling (44).

3. The rolling mill for eliminating the tail ear of the finished product according to claim 2, characterized in that: The motor inertia of the drive motor (46) is 176 kg·m².

4. The rolling mill for eliminating the tail ear of the finished product according to claim 3, characterized in that: The synchronous adjustment support assembly comprises a top cover (41), a second motor (47), a movable seat (48), a symmetrical threaded rod (49), a first rotating shaft (410), a straight shaft (411), a first gear ring (412), a first worm wheel (413), a first worm (414) and a second gear ring (415). The left end of the support frame (3) is symmetrically provided with a movable seat (48) in upper and lower directions. The front and rear ends of the movable seat (48) are threadedly connected to the symmetrical threaded rod (49) through a threaded sleeve. The top of the symmetrical threaded rod (49) is fixedly connected with the first gear ring (412). The top cover (41) is fixedly installed on the top of the support frame (3). The second motor (47) The second motor (47) is fixedly mounted on the outer wall of the top cover (41), and the driving end of the second motor (47) passes through the top cover (41) and is fixedly connected to the first rotating shaft (410), and the first rotating shaft (410) is fixedly connected to a first worm (414) in a bilaterally symmetrical manner, and the first worm (414) is meshingly connected to a first worm wheel (413), a straight shaft (411) is mounted in a mounting hole of the first worm wheel (413), and a second gear ring (415) is fixedly connected to the lower end of the straight shaft (411), and the second gear ring (415) is meshingly connected to two sets of first gear rings (412) on its corresponding side, and the straight shaft (411) is rotatably mounted on the top of the support frame (3) via a bearing.

5. The rolling mill for eliminating the tail ear of the finished product according to claim 4, characterized in that: The guide assembly (2) comprises a first motor (21), a first threaded rod (22), a first guide rod (23), a guide hole (24) and a guide seat (25); the first motor (21) is fixedly mounted on a side wall of the support frame (3); a driving end of the first motor (21) passes through the support frame (3) and is fixedly connected to the first threaded rod (22); the first threaded rod (22) is rotatably connected to the left and right inner walls of the support frame (3) via a bearing; the guide seat (25) is threadedly connected to the first threaded rod (22) via a threaded sleeve; the guide seat (25) is provided with a guide hole (24) for guiding; the lower end of the guide seat (25) is slidably connected to the first guide rod (23) via a sliding hole; and both ends of the first guide rod (23) are fixedly connected to the left and right inner walls of the support frame (3); and the end of the first guide rod (23) away from the support frame (3) is arranged toward the pre-finishing mill group.

6. The rolling mill for eliminating the tail ear of the finished product according to claim 5, characterized in that: The synchronous detection component (5) comprises a synchronous drive component and an ultrasonic probe (58). The synchronous drive component is installed at the end of the support frame (3) away from the pre-finishing mill group. The synchronous drive component is symmetrically connected to the ultrasonic probe (58) for detection.

7. The rolling mill for eliminating the tail ear of the finished product according to claim 6, characterized in that: The synchronous drive assembly comprises a second threaded rod (51), a sliding seat (52), a second guide rod (53), a second rotating shaft (54), a third motor (55), a second worm gear (56) and a second worm (57). The third motor (55) is mounted on the side wall of the support frame (3). The driving end of the third motor (55) is fixedly connected to the second rotating shaft (54). The second rotating shaft (54) is fixedly connected to the second worm gear (57) symmetrically up and down. The second worm gear (57) is meshingly connected to the second worm gear (56). The second threaded rod (51) is mounted in the mounting hole of the second worm gear (56). The sliding seat (52) is threadedly connected to the second threaded rod (51) through a threaded sleeve. The sliding seat (52) is slidably connected to the second guide rod (53) through a sliding hole. Two ends of the second threaded rod (51) are rotatably connected to the inner wall of the support frame (3). Two ends of the second guide rod (53) are fixedly connected to the inner wall of the support frame (3). The ultrasonic probe (58) is fixedly mounted in the mounting hole of the sliding seat (52).

8. The rolling mill for eliminating the tail ear of the finished product according to claim 7, characterized in that: The upper and lower ends of the second rotating shaft (54) are fixedly connected to the support frame (3) via a rotatably connected support seat.

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