Rotary feeding mechanism of cold pilger mill

Abstract

The invention relates to the technical field of metallurgical equipment, in particular to a rotary feeding mechanism of a cold pilger mill, which comprises a mounting frame and a movable frame, a positioning ball is movably arranged in the mounting frame, the outer surface of the positioning ball is tightly attached to the outer surface of a pipe blank, and a detection control assembly is arranged in the movable frame. The compensation rotation unit is arranged on the mounting frame and is used for enabling the detection control assembly to control the compensation rotation unit to work after the positioning ball is matched with the detection control assembly to detect the slipping phenomenon at the position, and then compensation is carried out; according to the rotary feeding mechanism of the cold pilger mill, when the arranged positioning ball makes contact with a pipe blank which is not rolled, the detection control assembly is in a non-working state, after the rotary device and the feeding device are started, the positioning ball can move along with the pipe blank, at the moment, the detection control assembly can rapidly detect abnormal conditions, and the situation of secondary reworking of the pipe blank is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical equipment, in particular to a rotary feeding mechanism of a cold rolling tube mill. Background Art

[0002] The rotary feeding mechanism of the cold rolling mill is one of its core components. It is mainly used to realize the periodic rotation and axial feeding movement of the metal tube billet during the cold rolling process, so as to ensure uniform deformation of the tube during the rolling process and improve the precision and surface quality.

[0003] When the cold rolling mill is actually used, the operating condition of its rotary feeding mechanism is crucial. This mechanism mainly relies on the coordinated operation of two curved wheels to push the tube billet back and forth into the mandrel to realize the rolling process. Under normal circumstances, the two curved wheels cooperate precisely and stably push the tube billet to ensure smooth rolling.

[0004] However, in long-term production practice, we have found a more difficult problem: the two curved wheels are prone to contact slippage in the process of pushing the tube billet. This is mainly because the friction between the curved wheel and the tube billet is insufficient, which may be caused by wear on the curved wheel surface, reduced roughness, or oil stains and excessive lubrication on the tube billet surface. Once slippage occurs, the advancement speed of the tube billet when entering the mandrel will be unstable, which directly leads to uneven thickness distribution of the inner wall of the rolled tube billet. This uneven inner wall is difficult to meet the qualified standards in the subsequent strict quality inspection link. A large number of tube billets can only be reworked helplessly, which not only consumes a lot of manpower, material resources and time costs, but also seriously affects production efficiency and the economic benefits of the enterprise. For this reason, we propose a rotary feeding mechanism for a cold rolling tube mill. Summary of the invention

[0005] A technical problem to be solved by the present application is: how to design a rotary feeding mechanism of a cold rolling tube mill to prevent the rolling roller from slipping.

[0006] In order to solve the above technical problems, the embodiment of the present application provides a rotary feeding mechanism of a cold rolling mill, comprising a mounting frame, a rotary device, a feeding device and a moving frame, and also comprising:

[0007] A positioning ball is movably arranged inside the installation frame, and its outer surface is closely fitted to the outer surface of the tube blank;

[0008] A detection control component, which is arranged in the moving frame and is used to prevent the positioning ball from reaching a set height when the positioning ball detects that the rotating device and the feeding device are slipping, thereby detecting that a slipping phenomenon occurs;

[0009] A compensating roller, movably arranged inside the mounting frame, and a groove on an outer surface of which is movably arranged on an outer surface of the tube blank;

[0010] Compensation rotation unit, which is arranged on the installation frame and is used to make the detection control component control the operation of the compensation rotation unit after detecting the slipping phenomenon at the positioning ball mating detection control component, so that the compensation rotation unit drives the compensation roller to roll over the slipping part, thereby performing compensation.

[0011] In some embodiments, the detection control component includes a fixed plate arranged inside the moving frame. A detection head is arranged on the top of the fixed plate. A moving detection disk is movably arranged on the top of the fixed plate, and the detection parts of the moving detection disk and the detection head are arranged opposite to each other.

[0012] In some embodiments, a spline shaft is fixedly arranged at the bottom of the detection head, and a spline groove is formed inside the fixed plate. The spline shaft is movably arranged on the inner wall of the spline groove. A return spring rod is fixedly arranged at the bottom end of the spline shaft, and the outer surface of the positioning ball is fixedly arranged at the bottom end of the return spring rod.

[0013] In some embodiments, a second spring is movably sleeved on the outer surface of the spline shaft. Both the upper and lower ends of the second spring are fixedly provided with connecting rings, and the two connecting rings are respectively arranged at the bottom of the fixed plate and on the outer surface of the return spring rod.

[0014] In some embodiments, a rolling member is arranged inside the moving frame for rolling the rolled tube blank. The rolling member includes a straight plate arranged inside the moving frame. A second rack is fixedly arranged on the side of the straight plate. Moving side plates are arranged on both sides of the moving frame. Both of the two moving side plates are movably arranged inside the installation frame. A connecting frame is arranged on the feeding device. A rolling roller is rotatably arranged on the inner wall of the connecting frame. A second gear is arranged between the rolling roller and the connecting frame. The second gear and the second rack are meshed with each other, and the fixed plate is fixedly arranged on the side of the straight plate.

[0015] In some embodiments, the compensation rotation unit includes a fixed frame fixedly arranged on the top of the installation frame. A servo motor is arranged on the top of the fixed frame. A threaded rod is arranged at the output end of the servo motor. An L-shaped plate is threadedly connected to the outer surface of the threaded rod. A U-shaped plate is arranged on the side of the L-shaped plate. Moving frames are arranged at both ends of the U-shaped plate. Limiting plates are fixedly arranged on both sides of the inner wall of the installation frame.

[0016] In some embodiments, a rotating rod is rotatably arranged on the inner wall of the moving frame, the compensation roller is fixedly sleeved on the outer surface of the rotating rod, a first gear is fixedly sleeved on the outer surface of the rotating rod, a limiting groove is formed in the side edge of the limiting plate, a limiting disc is movably arranged on the inner wall of the limiting groove, a first rack is arranged on the end face of the limiting disc, the first rack meshes with the first gear, a sliding frame is fixedly arranged at the top of the first rack, and the top of the sliding frame is movably arranged inside the moving frame.

[0017] In some embodiments, a Z-shaped plate is fixedly arranged on the side edge of the limiting plate, a Z-shaped groove is formed in the Z-shaped plate, a sliding rod is movably arranged on the inner wall of the Z-shaped groove, the bottom end of the sliding rod is fixedly arranged on the top of the moving frame, a wedge block is fixedly sleeved on the outer surface of the sliding rod, the wedge block is movably arranged inside the Z-shaped plate, a chuck is arranged at the top end of the sliding rod, a first spring is sleeved on the outer surface of the sliding rod, the top end of the first spring is fixedly arranged at the bottom end of the chuck, and a limiting ring is arranged at the bottom end of the first spring, the limiting ring is movably sleeved on the outer surface of the sliding rod, and the bottom end of the limiting ring is movably arranged outside the Z-shaped plate.

[0018] In some embodiments, a linkage assembly is arranged between the fixing plate and the U-shaped plate for linking the movements of the positioning ball and the compensation roller. The linkage assembly includes a fixed frame fixedly arranged on the top of the fixing plate, the inner side of the fixed frame is movably arranged on the side edge of the U-shaped plate, a top rod is fixedly arranged at the top end of the spline shaft, a connecting clip is fixedly arranged at the top end of the top rod, a connecting rod is arranged on the inner wall of the connecting clip, a suspension rope is fixedly arranged on the outer surface of the connecting rod, and a plurality of suspension rings are fixedly arranged inside the fixed frame, and the outer surface of the suspension rope is movably arranged inside the plurality of suspension rings.

[0019] In some embodiments, a fixed disc is fixedly arranged on the top of the U-shaped plate, the other end of the suspension rope is arranged at the top end of the fixed disc, a guide rod is fixedly arranged inside the fixed frame, one end of the guide rod penetrates through the side edge of the U-shaped plate, and a third spring is fixedly sleeved on the outer surface of the guide rod, and one end of the third spring is arranged on the side edge of the U-shaped plate.

[0020] The present invention has at least the following beneficial effects:

[0021] 1. When the set positioning ball contacts the unrolled tube blank, the detection and control component is in a non-working state. After the rotary device and the feeding device are started, the positioning ball will move from the part with a larger diameter of the tube blank to the part with a smaller diameter as the tube blank moves. During this process, the system can judge whether there is a slipping phenomenon accordingly. If slipping occurs, the positioning ball will stay at a specific position on the rolling inclined plane of the tube blank, and at this time, the detection and control component can quickly detect the abnormal situation. In this way, the staff can discover the problem in time and effectively reduce the situation of secondary rework of the tube blank;

[0022] 2. When the detection and control component detects a slipping situation, the compensation rotation unit immediately responds and works in coordination. It drives the supplementary roller to move to the position where the positioning ball is located and rolls the tube blank specifically. Through this operation, the tube blank can be restored to the set ideal state, effectively reducing the quality problems of the tube blank caused by slipping and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] Figure 2 It is a schematic diagram of the structure of the positioning ball, moving frame and supplementary roller of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure of the positioning ball, detection and control component and rolling part of the present invention;

[0026] Figure 4 It is an exploded structure diagram of the positioning ball and detection and control component of the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the supplementary roller and compensation rotation unit of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the supplementary roller, gear one and rack one of the present invention;

[0029] Figure 7 It is an exploded structure diagram of the supplementary roller, moving frame, sliding rod and wedge block of the present invention;

[0030] Figure 8 It is a schematic diagram of the structure of the U-shaped plate and linkage component of the present invention;

[0031] Figure 9 It is a schematic diagram of the structure of the linkage component, positioning ball, U-shaped plate and fixing plate of the present invention;

[0032] Figure 10 It is a schematic diagram of the structure of the linkage component of the present invention.

[0033] In the figure: 1. Installation frame; 2. Rotary device; 3. Feeding device; 4. Moving frame; 5. Positioning ball; 6. Compensation roller; 7. Compensation rotary unit; 71. Fixed frame; 72. Servo motor; 73. Threaded rod; 74. L-shaped plate; 75. U-shaped plate; 76. Z-shaped groove; 77. Z-shaped plate; 78. Moving frame; 79. Limiting plate; 710. First gear; 711. Chuck; 712. First spring; 713. Wedge block; 714. Limiting ring; 715. Limiting groove; 716. Slide bar; 717. First rack; 718. Rotating rod; 719. Sliding frame; 720. Limiting disc; 8. Detection and control assembly; 81. Fixed plate; 82. Detection head; 83. Moving detection disc; 84. Spline groove; 85. Spline shaft; 86. Second spring; 87. Connecting ring; 88. Rebound rod; 9. Rolling part; 91. Moving side plate; 92. Straight plate; 93. Rolling roller; 94. Second rack; 95. Second gear; 96. Connecting frame; 10. Linkage assembly; 101. Fixed frame; 102. Jack rod; 103. Connecting clip; 104. Suspension rope; 105. Connecting rod; 106. Suspension ring; 107. Fixed disc; 108. Guide rod; 109. Third spring. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1: Please refer to Figure 1-7 , the present invention provides a technical solution: a rotary feeding mechanism of a cold rolling tube mill, including an installation frame 1, a rotary device 2, a feeding device 3 and a moving frame 4, and further including:

[0036] A positioning ball 5 is movably arranged inside the installation frame 1, and its outer surface is closely attached to the outer surface of the tube blank;

[0037] A detection and control assembly 8 is arranged in the moving frame 4 and is used to detect the slipping phenomenon when the positioning ball 5 detects the slipping of the rotary device 2 and the feeding device 3, so that the positioning ball 5 cannot reach the set height;

[0038] A compensation roller 6 is movably arranged inside the installation frame 1, and the groove on its outer surface is movably arranged on the outer surface of the tube blank;

[0039] The compensation rotation unit 7 is arranged on the mounting frame 1. After the positioning ball 5 cooperates with the detection control component 8 to detect the slipping phenomenon, the detection control component 8 controls the compensation rotation unit 7 to work, so that the compensation rotation unit 7 drives the compensation roller 6 to roll the slipping part, thereby performing compensation.

[0040] The detection control component 8 includes a fixing plate 81 arranged inside the moving frame 4. A detection head 82 is arranged on the top of the fixing plate 81. A moving detection disk 83 is movably arranged on the top of the fixing plate 81. The detection parts of the moving detection disk 83 and the detection head 82 are arranged opposite to each other. By detecting whether the height of the moving detection disk 83 changes after moving to a specified position by the detection head 82, the slipping phenomenon is judged.

[0041] A spline shaft 85 is fixedly arranged at the bottom of the detection head 82, and a spline groove 84 is formed inside the fixing plate 81. The spline shaft 85 is movably arranged on the inner wall of the spline groove 84. A return spring rod 88 is fixedly arranged at the bottom end of the spline shaft 85. The outer surface of the positioning ball 5 is fixedly arranged at the bottom end of the return spring rod 88. The spline shaft 85 can enable the return spring rod 88 and the positioning ball 5 to move up and down better, reducing the error caused by rotation.

[0042] A second spring 86 is movably sleeved on the outer surface of the spline shaft 85. Connecting rings 87 are fixedly arranged at both the upper and lower ends of the second spring 86. The two connecting rings 87 are respectively arranged at the bottom of the fixing plate 81 and on the outer surface of the return spring rod 88. By arranging the second spring 86, the positioning ball 5 can be driven to always fit on the tube blank.

[0043] A rolling member 9 is arranged inside the moving frame 4 for rolling the rolled tube blank. The rolling member 9 includes a straight plate 92 arranged inside the moving frame 4. A second rack 94 is fixedly arranged on the side of the straight plate 92. Moving side plates 91 are arranged on both sides of the moving frame 4. The two moving side plates 91 are both movably arranged inside the mounting frame 1. A connecting frame 96 is arranged on the feeding device 3. A rolling roller 93 is rotatably arranged on the inner wall of the connecting frame 96. A second gear 95 is arranged between the rolling roller 93 and the connecting frame 96. The second gear 95 and the second rack 94 are meshed with each other, and the fixing plate 81 is fixedly arranged on the side of the straight plate 92.

[0044] The compensation rotation unit 7 includes a fixing frame 71 fixedly arranged on the top of the mounting frame 1. A servo motor 72 is arranged on the top of the fixing frame 71. A threaded rod 73 is arranged at the output end of the servo motor 72. An L-shaped plate 74 is threadedly connected to the outer surface of the threaded rod 73. A U-shaped plate 75 is arranged on the side of the L-shaped plate 74. Moving frames 78 are arranged at both ends of the U-shaped plate 75. Limiting plates 79 are fixedly arranged on both sides of the inner wall of the mounting frame 1. The servo motor 72 is controlled to work by the detection head 82.

[0045] A rotating rod 718 is rotatably arranged on the inner wall of the moving frame 78. The compensation roller 6 is fixedly sleeved on the outer surface of the rotating rod 718. A first gear 710 is fixedly sleeved on the outer surface of the rotating rod 718. A limiting groove 715 is formed inside the side of the limiting plate 79. A limiting disc 720 is movably arranged on the inner wall of the limiting groove 715. A first rack 717 is arranged on the end face of the limiting disc 720. The first rack 717 meshes with the first gear 710. A sliding frame 719 is fixedly arranged at the top of the first rack 717. The top of the sliding frame 719 is movably arranged inside the moving frame 78. When the compensation roller 6 and the first gear 710 move to the slipping part, the first gear 710 will rotate under the action of the first rack 717, thereby driving the compensation roller 6 to rotate.

[0046] A Z-shaped plate 77 is fixedly arranged on the side of the limiting plate 79. A Z-shaped groove 76 is formed inside the Z-shaped plate 77. A sliding rod 716 is movably arranged on the inner wall of the Z-shaped groove 76. The bottom end of the sliding rod 716 is fixedly arranged on the top of the moving frame 78. A wedge block 713 is fixedly sleeved on the outer surface of the sliding rod 716. The wedge block 713 is movably arranged inside the Z-shaped plate 77. A chuck 711 is arranged at the top end of the sliding rod 716. A first spring 712 is sleeved on the outer surface of the sliding rod 716. The top end of the first spring 712 is fixedly arranged at the bottom end of the chuck 711. And the bottom end of the first spring 712 is provided with a limiting ring 714. The limiting ring 714 is movably sleeved on the outer surface of the sliding rod 716. And the bottom end of the limiting ring 714 is movably arranged outside the Z-shaped plate 77. By sliding the sliding rod 716 on the inner wall of the Z-shaped groove 76 and sleeving the wedge block 713 on the outer surface, when the compensation roller 6 moves translationally, it will fit on the outer surface of the tube blank, so that the tube blank can be better rolled when in use.

[0047] When using this device, first, the rotating device 2 and the feeding device 3 work to roll the tube blank. At this time, the moving frame 4 will drive the second rack 94 to drive the second gear 95 to rotate, thereby driving the rolling roller 93 to roll the tube blank. At this time, when the rolling roller 93 slips, since the fixing plate 81 is arranged on the straight plate 92, the moving distance of the positioning ball 5 remains unchanged. And because the rolling roller 93 slips, when rolling a larger tube blank into a smaller tube blank, a part will be missing. For this reason, the positioning ball 5 will reach the inclined surfaces of the two under the extrusion of the second spring 86. For this reason, the return rod 88 will move. The return rod 88 will drive the spline shaft 85 to move. Thus, the spline shaft 85 will drive the moving detection disc 83 to move. At this time, the detection head 82 will detect that the moving detection disc 83 does not descend according to the set program. Therefore, the servo motor 72 will be started;

[0048] When the servo motor 72 is started, the threaded rod 73 will rotate, and the threaded rod 73 will drive the L-shaped plate 74 to move, and the L-shaped plate 74 will drive the U-shaped plate 75 to move, so that the U-shaped plate 75 will drive the moving frame 78 to move. When the moving frame 78 moves, it will drive the gear 1 710 to move. Since the rack 1 717 is limited in the limiting groove 715, the gear 1 710 will rotate, and the rotating rod 718 will cause the compensation roller 6 to rotate. When it is about to reach the slipping point, when the moving frame 78 moves, it will drive the slide bar 716 to move. The sleeve on the slide bar 716 will move on the inside of the Z-shaped plate 77, so it will drive the moving frame 78 to the center of the tube blank, so that the compensation roller 6 fits the outer surface of the tube blank. At this time, the rack 1 717 will slide in the limiting groove 715 under the action of the limiting plate 720, but will not separate from the limiting plate 79, thereby completing the work on the slipping point.

[0049] Example 2: Please refer to Figure 8-10 The present invention provides a technical solution: a linkage component 10 is arranged between the fixed plate 81 and the U-shaped plate 75, which is used to link the movements of the positioning ball 5 and the compensation roller 6. The linkage component 10 includes a fixed frame 101 fixedly arranged on the top of the fixed plate 81, the inner side of the fixed frame 101 is movably arranged on the side of the U-shaped plate 75, a top rod 102 is fixedly arranged on the top of the spline shaft 85, a connecting clamp 103 is fixedly arranged on the top of the top rod 102, a connecting rod 105 is arranged on the inner wall of the connecting clamp 103, a hanging rope 104 is fixedly arranged on the outer surface of the connecting rod 105, and a plurality of hanging rings 106 are fixedly arranged on the inner side of the fixed frame 101, and the outer surface of the hanging rope 104 is movably arranged inside the plurality of hanging rings 106. By moving the fixed plate 81, the spline shaft 85 drives the U-shaped plate 75 to move, and drives the hanging rope 104 to move.

[0050] A fixed plate 107 is fixedly provided on the top of the U-shaped plate 75, and the other end of the suspension rope 104 is arranged at the top of the fixed plate 107, and a guide rod 108 is fixedly provided on the inner side of the fixed frame 101, and one end of the guide rod 108 passes through the side of the U-shaped plate 75, and a spring three 109 is fixedly provided on the outer surface of the guide rod 108, and one end of the spring three 109 is arranged on the side of the U-shaped plate 75, and the spline shaft 85 descends, which will drive the suspension rope 104 to contract, thereby driving the compensation roller 6 to crush the slipping part.

[0051] At this time, when the fixed plate 81 moves, it will drive the U-shaped plate 75 to move synchronously, and when the positioning ball 5 descends, it will drive the top rod 102, the connecting clamp 103 and the connecting rod 105 to descend. For this purpose, the fixed plate 107 will be driven to move through the suspension rope 104. Since the fixed plate 107 is set on the top of the U-shaped plate 75, the U-shaped plate 75 will move toward the positioning ball 5 at this time, and the trajectory is limited by the guide rod 108. For this reason, the compensation roller 6 can be driven to perform compensation work.

[0052] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A rotary feeding mechanism for a cold rolling mill, comprising a mounting frame (1), a rotary device (2), a feeding device (3) and a moving frame (4), characterized in that: Also included are: A positioning ball (5) is movably arranged inside the installation frame (1), and its outer surface is closely fitted to the outer surface of the tube blank; A detection control component (8), the detection control component (8) being arranged in the moving frame (4) and being used for preventing the positioning ball (5) from reaching a set height when the positioning ball (5) detects that the rotating device (2) and the feeding device (3) are slipping, thereby detecting the occurrence of a slipping phenomenon; A compensation roller (6) is movably arranged inside the installation frame (1), and a groove on its outer surface is movably arranged on the outer surface of the tube blank; The compensating rotary unit (7) is arranged on the mounting frame (1) and is used for, after the positioning ball (5) cooperates with the detecting control component (8) to detect the slipping phenomenon at the position, the detecting control component (8) controls the compensating rotary unit (7) to work, so that the compensating rotary unit (7) drives the compensating roller (6) to roll over the slipping part, thereby performing compensation.

2. The rotary feeding mechanism of the cold rolling mill according to claim 1, characterized in that: The detection control component (8) comprises a fixed plate (81) arranged inside the moving frame (4); a detection head (82) is arranged on the top of the fixed plate (81); a movable detection disk (83) is movably arranged on the top of the fixed plate (81); and the movable detection disk (83) and the detection part of the detection head (82) are arranged opposite to each other.

3. The rotary feeding mechanism of the cold rolling mill according to claim 2, characterized in that: A spline shaft (85) is fixedly arranged at the bottom of the detection head (82), and a spline groove (84) is opened inside the fixing plate (81). The spline shaft (85) is movably arranged on the inner wall of the spline groove (84), and a rebound rod (88) is fixedly arranged at the bottom end of the spline shaft (85). The outer surface of the positioning ball (5) is fixedly arranged at the bottom end of the rebound rod (88).

4. The rotary feeding mechanism of the cold rolling mill according to claim 3, characterized in that: A second spring (86) is movably sleeved on the outer surface of the spline shaft (85), and connecting rings (87) are fixedly arranged at both upper and lower ends of the second spring (86), and the two connecting rings (87) are respectively arranged at the bottom of the fixing plate (81) and the outer surface of the rebound rod (88).

5. The rotary feeding mechanism of the cold rolling mill according to claim 4, characterized in that: A rolling part (9) is arranged inside the movable frame (4) for rolling the rolled tube blank, the rolling part (9) comprises a straight plate (92) arranged inside the movable frame (4), a rack (94) is fixedly arranged on the side of the straight plate (92), movable side plates (91) are arranged on both sides of the movable frame (4), the two movable side plates (91) are movably arranged on the inner side of the mounting frame (1), and a connecting frame (96) is arranged on the feeding device (3), a rolling roller (93) is rotatably arranged on the inner wall of the connecting frame (96), a gear (95) is arranged between the rolling roller (93) and the connecting frame (96), the gear (95) and the rack (94) are meshed with each other, and the fixed plate (81) is fixedly arranged on the side of the straight plate (92).

6. The rotary feeding mechanism of the cold rolling mill according to claim 1, characterized in that: The compensating rotary unit (7) comprises a fixing frame (71) fixedly arranged on the top of the installation frame (1); a servo motor (72) is arranged on the top of the fixing frame (71); a threaded rod (73) is arranged at the output end of the servo motor (72); an L-shaped plate (74) is threadedly connected to the outer surface of the threaded rod (73); a U-shaped plate (75) is arranged on the side of the L-shaped plate (74); movable frames (78) are arranged at both ends of the U-shaped plate (75); and limit plates (79) are fixedly arranged on both sides of the inner wall of the installation frame (1).

7. The rotary feeding mechanism of the cold rolling mill according to claim 6, characterized in that: A rotating rod (718) is rotatably provided on the inner wall of the movable frame (78); the compensation roller (6) is fixedly sleeved on the outer surface of the rotating rod (718); a gear (710) is fixedly sleeved on the outer surface of the rotating rod (718); a limiting groove (715) is provided inside the side of the limiting plate (79); a limiting disk (720) is movably provided on the inner wall of the limiting groove (715); a rack (717) is provided on the end surface of the limiting disk (720); the rack (717) and the gear (710) are meshed with each other; a sliding frame (719) is fixedly provided on the top of the rack (717); the top of the sliding frame (719) is movably provided on the inner side of the movable frame (78).

8. The rotary feeding mechanism of the cold rolling mill according to claim 7, characterized in that: A Z-shaped plate (77) is fixedly arranged on the side of the limiting plate (79), a Z-shaped groove (76) is provided inside the Z-shaped plate (77), a sliding rod (716) is movably arranged on the inner wall of the Z-shaped groove (76), the bottom end of the sliding rod (716) is fixedly arranged on the top of the moving frame (78), a wedge block (713) is fixedly sleeved on the outer surface of the sliding rod (716), the wedge block (713) is movably arranged inside the Z-shaped plate (77), and the sliding rod (716) is fixedly sleeved on the outer surface of the sliding rod (716). A chuck (711) is provided at the top end of the rod (716), a spring (712) is sleeved on the outer surface of the sliding rod (716), the top end of the spring (712) is fixedly arranged on the bottom end of the chuck (711), and a limiting ring (714) is provided at the bottom end of the spring (712), the limiting ring (714) is movably sleeved on the outer surface of the sliding rod (716), and the bottom end of the limiting ring (714) is movably arranged on the outer side of the Z-shaped plate (77).

9. The rotary feeding mechanism of the cold rolling mill according to claim 3, characterized in that: A linkage assembly (10) is provided between the fixed plate (81) and the U-shaped plate (75) for linking the movements of the positioning ball (5) and the compensation roller (6), the linkage assembly (10) comprising a fixed frame (101) fixedly provided on the top of the fixed plate (81), the inner side of the fixed frame (101) being movably provided on the side of the U-shaped plate (75), a top rod (102) being fixedly provided on the top of the spline shaft (85), a connecting clamp (103) being fixedly provided on the top of the top rod (102), a connecting rod (105) being provided on the inner wall of the connecting clamp (103), a hanging rope (104) being fixedly provided on the outer surface of the connecting rod (105), and a plurality of hanging rings (106) being fixedly provided on the inner side of the fixed frame (101), the outer surface of the hanging rope (104) being movably provided inside the plurality of hanging rings (106).

10. The rotary feeding mechanism of the cold rolling mill according to claim 9, characterized in that: A fixing plate (107) is fixedly arranged on the top of the U-shaped plate (75), the other end of the suspension rope (104) is arranged on the top of the fixing plate (107), and a guide rod (108) is fixedly arranged on the inner side of the fixing frame (101), one end of the guide rod (108) passes through the side of the U-shaped plate (75), and a spring three (109) is fixedly sleeved on the outer surface of the guide rod (108), and one end of the spring three (109) is arranged on the side of the U-shaped plate (75).

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