Self-speed-setting type metal pipe continuous cold rolling device

Abstract

The invention discloses a self-speed-setting type metal pipe continuous cold rolling device, and relates to the technical field of metal pipe continuous rolling, the self-speed-setting type metal pipe continuous cold rolling device comprises a workbench, the workbench is fixedly connected with a connecting frame, one side of the connecting frame is provided with an inlet used for placing a blank pipe, and the other side of the connecting frame is provided with a metal pipe used for moving out the metal pipe formed by continuous cold rolling. The side, close to the inlet, of the connecting frame is rotationally connected with a rolling roller set, and the side, close to the outlet, of the connecting frame is rotationally connected with a shaping roller set. In the rolling process, when the load of the motor is large due to large resistance, the power of the middle forming roller is cut off, and only the power of the rolling rollers responsible for rolling and the power of the shaping rollers responsible for shaping are reserved, so that the rolling rollers and the shaping rollers on the two sides share the main working load, the overall pressure of equipment can be effectively relieved, and the service life of the equipment is prolonged. The service life of equipment is prolonged, abrasion of a transmission system and a motor is reduced, shutdown caused by too large pressure of the motor is avoided, and the production efficiency stability is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of continuous rolling of metal pipes, in particular to a self-speed-adjusting metal pipe continuous cold rolling device. Background Art

[0002] Rolling is a common metal forming process that passes metal materials (such as blank tubes) between one or more pairs of rollers and uses roller pressure to squeeze and deform them, helping to ensure the consistency of each tube and reduce dimensional deviations, thereby achieving the desired shape, size and performance.

[0003] In traditional multi-pass rolling, there are too many cold rolling rollers driven by power sources, including rollers mainly responsible for rolling in the early stage, rollers responsible for continuous forming in the middle, and rollers responsible for shaping in the later stage. Therefore, when multiple cold rolling rollers are working at the same time, the power source of the equipment may bear a large load as a whole, especially when the material has high resistance to deformation, which may cause equipment overload or damage. Therefore, it is usually necessary to protect the equipment by shutting down, thus affecting the production efficiency and stability of cold rolling. Summary of the invention

[0004] In order to overcome the disadvantage that continuous cold rolling easily causes equipment overload or damage, resulting in shutdown, the present invention provides a self-speed-regulating metal tube continuous cold rolling device.

[0005] A self-speed-adjusting metal tube continuous cold rolling device comprises a workbench, the workbench is fixedly connected to a connecting frame, one side of the connecting frame is provided with an entrance for placing a blank tube, and the other side of the connecting frame is provided with a metal tube formed by continuous cold rolling. A rolling roller group is rotatably connected to the side of the connecting frame close to the entrance, and a shaping roller group is rotatably connected to the side of the connecting frame close to the outlet. At least one group of sliders symmetrically distributed along the connecting frame is slidably connected in the middle of the connecting frame, and a shaping roller group is rotatably connected between each group of sliders and on the connecting frame. A double-axis motor is fixedly connected to the connecting frame, and the double axes of the motor are fixedly connected to a rotating shaft, which is rotatably connected to the connecting frame. The rolling rollers, shaping rollers and shaping rollers on one side of each group are all driven by meshing bevel gear groups with adjacent rotating shafts. The connecting frame is fixedly connected to a speed sensor, and the connecting frame is fixedly connected to a cylinder. The telescopic end of the cylinder is fixedly connected to a sliding frame for disengaging the bevel gear on the shaping roller from the bevel gear on the rotating shaft.

[0006] In a preferred embodiment of the present invention, the bevel gear on the rotating shaft near the shaping roller is fixedly connected to the sliding frame and is spline-connected to the rotating shaft.

[0007] In a preferred embodiment of the present invention, the speed sensor is electrically connected to the cylinder through the control module.

[0008] In a preferred embodiment of the present invention, there is further at least one set of first connecting rods. The first connecting rods are rotatably connected to the sliding frame. The first connecting rods are rotatably connected to first rotating rods. The connecting frame is rotatably connected to at least one set of screw rods. The first rotating rods are fixedly connected to adjacent screw rods. The sliders are threadedly connected to adjacent screw rods.

[0009] In a preferred embodiment of the present invention, there is also a nozzle for spraying lubricating oil. The nozzle is arranged on one side of the connecting frame close to the inlet. The connecting frame is fixedly connected with an oil delivery pipe for inputting lubricating oil. A flexible hose is communicated between the nozzle and the oil delivery pipe.

[0010] In a preferred embodiment of the present invention, the nozzle is rotatably connected to the connecting frame.

[0011] In a preferred embodiment of the present invention, there is also a booster fan. The booster fan is rotatably connected inside the oil delivery pipe. The rotating booster fan is used to provide oil delivery power. The sliding frame is rotatably connected with a sliding sleeve. The sliding sleeve is spline-connected to the booster fan. Both the sliding sleeve and the rotating shaft are fixedly connected with helical gears. When the sliding sleeve slides, the helical gear on it is driven to move to mesh with the helical gear on the rotating shaft.

[0012] In a preferred embodiment of the present invention, there is also a second rotating rod. The second rotating rod is fixedly connected to the rotating shaft on the side close to the inlet of the connecting frame. A second connecting rod for driving the nozzle to swing back and forth in a pendulum-like manner is rotatably connected between the second rotating rod and the nozzle.

[0013] The beneficial effects of the present invention are as follows: During the rolling process of the present invention, when the resistance is large, resulting in a large load on the motor, by cutting off the power of the middle forming roller and only retaining the power of the rolling rollers on both sides responsible for rolling and the sizing roller responsible for sizing, the rolling rollers and sizing rollers on both sides share the main working load, which can effectively reduce the overall pressure of the equipment, extend the service life of the equipment, reduce the wear of the transmission system and the motor, and will not cause shutdown due to excessive motor pressure, ensuring the stability of production efficiency.

[0014] When the present invention disconnects the middle forming roller of the motor to reduce the load, the upper forming roller also disengages upward from the metal pipe, avoiding the resistance effect during the continuous rolling of the metal pipe by the forming roller. In this way, the load on the motor is further reduced to restore the normal cold rolling speed.

[0015] When the present invention disconnects the middle forming roller of the motor to reduce the load, the lower helical gear also drives the upper helical gear to start rotating, and the nozzle also starts to swing back and forth, so that the lubricating oil flows to the nozzle and is evenly sprayed onto the blank pipe, reducing the resistance during continuous cold rolling and further reducing the load. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the first perspective of the present invention.

[0017] Figure 2 This is a three-dimensional structure schematic diagram of the second perspective of the present invention.

[0018] Figure 3 This is a three-dimensional structure schematic diagram of components such as the rolling roll, forming roll, and sizing roll of the present invention.

[0019] Figure 4 This is a three-dimensional structure schematic diagram of components such as the motor, rotating shaft, and bevel gear of the present invention.

[0020] Figure 5 This is a three-dimensional structure schematic diagram of components such as the rotating shaft, bevel gear, and sliding frame of the present invention.

[0021] Figure 6 This is a three-dimensional structure schematic diagram of components such as the first connecting rod, first rotating rod, and screw of the present invention.

[0022] Figure 7 This is a three-dimensional structure schematic diagram of components such as the nozzle, oil delivery pipe, and hose of the present invention.

[0023] Figure 8 This is a three-dimensional structure schematic diagram of the nozzle of the present invention.

[0024] Figure 9 This is a three-dimensional structure schematic diagram of components such as the oil delivery pipe, sliding sleeve, and bevel gear of the present invention.

[0025] Figure 10 This is a three-dimensional structure schematic diagram of components such as the booster fan, sliding sleeve, and bevel gear of the present invention.

[0026] Figure 11 This is a three-dimensional structure schematic diagram of components such as the nozzle, second rotating rod, and second connecting rod of the present invention.

[0027] In the above drawings: 101: workbench, 102: connecting frame, 103: rolling roll, 104: forming roll, 105: sizing roll, 106: speed sensor, 107: slider, 108: motor, 1081: rotating shaft, 109: bevel gear, 110: cylinder, 111: sliding frame, 201: first connecting rod, 202: first rotating rod, 203: screw, 301: nozzle, 302: oil delivery pipe, 303: hose, 401: booster fan, 402: sliding sleeve, 403: bevel gear, 501: second rotating rod, 502: second connecting rod. Detailed implementation manners

[0028] The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the present invention are shown. However, the present invention may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and fully convey the scope of the present invention to those skilled in the art.

[0029] Example 1: A self-paced continuous cold rolling device for metal pipes, as Figures 1 - 5 shown, includes a workbench 101. A connecting frame 102 is fixedly connected to the top of the workbench 101. An inlet for inserting a blank pipe is opened on the left side of the connecting frame 102, and an outlet for removing the continuously cold-rolled metal pipe is opened on the right side of the connecting frame 102. Two upper and lower rolling rolls 103 are rotatably connected to the left side of the connecting frame 102, and two upper and lower sizing rolls 105 are rotatably connected to the right side of the connecting frame 102. Two sliders 107 symmetrically distributed front and back along the connecting frame 102 are slidably connected to the middle of the connecting frame 102. The front and back two sliders 107 are rotatably connected to an upper forming roll 104, and a lower forming roll 104 is connected to the connecting frame 102. The upper and lower two forming rolls 104 are a group. A double-shaft motor 108 is fixedly connected to the front side of the connecting frame 102. Both shafts of the motor 108 are fixedly connected to a rotating shaft 1081 through couplings. The right rotating shaft 1081 is rotatably connected to the connecting frame 102. The lower rolling roll 103, the lower sizing roll 105, and the lower forming roll 104 are all driven by two meshing bevel gears 109 between them and the adjacent rotating shaft 1081. A speed sensor 106 is fixedly connected to the top right side of the connecting frame 102. An air cylinder 110 is fixedly connected to the bottom left side of the connecting frame 102. The speed sensor 106 is electrically connected to the air cylinder 110 through a control module. The telescopic end of the air cylinder 110 is fixedly connected to a sliding frame 111. The sliding frame 111 is slidably connected to the bottom of the connecting frame 102. The bevel gear 109 on the rotating shaft 1081 near the sizing roll 105 is fixedly connected to the sliding frame 111 and is spline-connected to the rotating shaft 1081.

[0030] The specific operation of cold rolling the metal pipe is as follows: Insert the blank pipe to be cold-rolled from the left inlet of the connecting frame 102 to between the upper and lower rolling rolls 103. Then start the motor 108. The output shaft of the motor 108 drives the rotating shaft 1081 to rotate. The rotating shaft 1081 drives each group of rolling rolls 103, forming rolls 104, and sizing rolls 105 to rotate synchronously through each group of bevel gears 109. The rolling rolls 103, forming rolls 104, and sizing rolls 105 sequentially extrude the blank pipe to the right, so that the blank pipe is first rolled, then formed, and finally sized into a metal pipe.

[0031] During the above continuous cold rolling process, when the speed sensor 106 detects that the cold rolling speed is too slow, it indicates that the load on the motor 108 is too large. At this time, the middle forming roller 104 should be stopped in time to reduce the load, so as to gradually restore the normal cold rolling speed. The specific disconnection operation is as follows: The speed sensor 106 controls the cylinder 110 to extend to the right through the control module, so that the sliding frame 111 drives the bevel gear 109 thereon to move to the right, so that the middle bevel gear 109 group is disengaged from each other;

[0032] When the cold rolling speed gradually recovers, the speed sensor 106 controls the cylinder 110 to shorten to the left through the control module, so that the sliding frame 111 drives the bevel gear 109 thereon to move to the left, so that the middle bevel gears 109 are engaged with each other again, increasing the operation of the forming roller 104, and the forming effect of the metal tube can be improved.

[0033] In summary, during the rolling process of the present invention, when the resistance is large and the load on the motor 108 is large, by cutting off the power of the middle forming roller 104 and only retaining the power of the rolling rollers 103 on both sides responsible for rolling and the sizing rollers 105 responsible for sizing, the rolling rollers 103 and sizing rollers 105 on both sides share the main working load, which can effectively reduce the overall pressure of the equipment, extend the service life of the equipment, reduce the wear of the transmission system and the motor 108, and will not cause shutdown due to excessive pressure on the motor 108, ensuring the stability of production efficiency.

[0034] Embodiment 2: On the basis of Embodiment 1, as Figure 6 shown, there are also two first connecting rods 201 at the front and rear. The first connecting rod 201 is rotatably connected to the sliding frame 111. The first connecting rod 201 is rotatably connected to a first rotating rod 202. There are two front and rear screw rods 203 rotatably connected to the middle of the connecting frame 102. The first rotating rod 202 is fixedly connected to the adjacent screw rod 203. The slider 107 is threadedly connected to the adjacent screw rod 203.

[0035] When the sliding frame 111 moves to the right, it drives the first rotating rod 202 to rotate through the first connecting rod 201, thereby driving the screw rod 203 to rotate, so that the slider 107 slides upward. The slider 107 drives the upper forming roller 104 to move upward away from the just-rolled metal tube. In this way, when the motor 108 disconnects the middle forming roller 104 to reduce the load, the upper forming roller 104 also moves upward away from the metal tube, avoiding the resistance effect of the forming roller 104 during the continuous rolling of the metal tube. In this way, the load on the motor 108 is further reduced to restore the normal cold rolling speed;

[0036] Conversely, when the sliding carriage 111 moves to the left, it drives the first rotating rod 202 to reverse through the first connecting rod 201, thereby driving the screw rod 203 to reverse, causing the slider 107 to slide downward. The slider 107 drives the upper forming roller 104 to move downward and reset, so as to assist in the shaping effect of the metal pipe during the rolling process.

[0037] Embodiment 3: On the basis of Embodiment 2, as Figure 7 and Figure 8 shown, it further includes a nozzle 301 for spraying lubricating oil. The nozzle 301 is arranged on the left side of the connecting frame 102. The nozzle 301 is rotatably connected to the connecting frame 102. The connecting frame 102 is fixedly connected with an oil delivery pipe 302 for inputting lubricating oil. The oil delivery pipe 302 extends into the source of the lubricating oil. A hose 303 is connected and communicated between the nozzle 301 and the oil delivery pipe 302.

[0038] As Figure 9 and Figure 10 shown, it further includes a booster fan 401. The booster fan 401 is rotatably connected to the right side inside the oil delivery pipe 302. The rotating booster fan 401 is used to provide oil delivery power, so that the lubricating oil is pumped into the oil delivery pipe 302. The front side of the left part of the sliding carriage 111 is rotatably connected with a sliding sleeve 402. The sliding sleeve 402 is in spline connection with the booster fan 401. Bevel gears 403 are fixedly connected to both the sliding sleeve 402 and the rotating shaft 1081. When the sliding sleeve 402 slides to the right, the bevel gear 403 on it is driven to move to mesh with the bevel gear 403 on the rotating shaft 1081.

[0039] As Figure 11 shown, it further includes a second rotating rod 501. The second rotating rod 501 is fixedly connected to the left rotating shaft 1081. The second rotating rod 501 is rotatably connected to the left side of the connecting frame 102. A second connecting rod 502 is rotatably connected between the second rotating rod 501 and the nozzle 301. The second connecting rod 502 is used to drive the nozzle 301 to swing back and forth in a pendulum manner.

[0040] When the rotating shaft 1081 rotates, it drives the lower bevel gear 403 to rotate synchronously. When the sliding carriage 111 moves to the right, the sliding carriage 111 drives the upper bevel gear 403 to move to the right through the sliding sleeve 402 to mesh with the lower bevel gear 403. The lower bevel gear 403 drives the upper bevel gear 403 to start rotating, thereby driving the sliding sleeve 402 to rotate, and further driving the booster fan 401 to rotate, so that the lubricating oil is pumped into the oil delivery pipe 302 and then flows to the nozzle 301 through the hose 303. When the rotating shaft 1081 rotates, it drives the second rotating rod 501 to rotate. The second rotating rod 501 drives the nozzle 301 to swing back and forth through the second connecting rod 502, so that the lubricating oil is evenly sprayed onto the blank pipe, reducing the resistance during continuous cold rolling and further reducing the load.

[0041] The technical principles of the embodiments of the present invention have been described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be construed in any way as limiting the scope of protection of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can readily conceive of other specific implementation manners of the embodiments of the present invention without creative efforts, and these manners will fall within the scope of protection of the embodiments of the present invention.

Claims

1. A self-speed-adjusting metal tube continuous cold rolling device, comprising a workbench (101), the workbench (101) being fixedly connected to a connecting frame (102), one side of the connecting frame (102) being provided with an inlet for placing a blank tube, the other side of the connecting frame (102) being provided with a metal tube formed by continuous cold rolling, a side of the connecting frame (102) close to the inlet being rotatably connected to a rolling roller group (103), a side of the connecting frame (102) close to the outlet being rotatably connected to a shaping roller group (105), at least one group of sliders (107) symmetrically distributed along the connecting frame (102) being slidably connected in the middle of the connecting frame (102), and a shaping roller group (104) being rotatably connected between each group of sliders (107) and on the connecting frame (102); It is characterized in that, The connecting frame (102) is fixedly connected to a double-shaft motor (108), and the double shafts of the motor (108) are both fixedly connected to a rotating shaft (1081). The rotating shaft (1081) is rotatably connected to the connecting frame (102). The rolling rollers (103), the shaping rollers (105) and the forming rollers (104) on one side of each group are all driven by the adjacent rotating shafts (1081) through meshing bevel gear (109) groups. The connecting frame (102) is fixedly connected to a speed sensor (106). The connecting frame (102) is fixedly connected to a cylinder (110), and the telescopic end of the cylinder (110) is fixedly connected to a sliding frame (111) used for disengaging the bevel gear (109) on the shaping roller (105) from the bevel gear (109) on the rotating shaft (1081).

2. The self-paced continuous cold rolling device for metal pipes according to claim 1, characterized in that, The bevel gear (109) on the rotating shaft (1081) close to the shaping roller (105) is fixedly connected to the sliding frame (111) and is spline-connected to the rotating shaft (1081).

3. A self-paced continuous cold rolling device for metal pipes according to claim 2, characterized in that, The speed sensor (106) is electrically connected to the cylinder (110) through the control module.

4. A self-paced continuous cold rolling device for metal pipes according to claim 3, characterized in that, The invention also includes at least one group of first connecting rods (201), the first connecting rods (201) are rotatably connected to the sliding frame (111), the first connecting rods (201) are rotatably connected to the first rotating rods (202), the connecting frame (102) is rotatably connected to at least one group of screw rods (203), the first rotating rods (202) are fixedly connected to adjacent screw rods (203), and the sliding block (107) is threadedly connected to adjacent screw rods (203).

5. A self-paced continuous cold rolling device for metal pipes according to claim 4, characterized in that, The apparatus also includes a spray head (301) for spraying lubricating oil. The spray head (301) is arranged on a side of the connecting frame (102) close to the inlet. The connecting frame (102) is fixedly connected with an oil delivery pipe (302) for inputting lubricating oil. A hose (303) is connected between the spray head (301) and the oil delivery pipe (302).

6. The self-paced continuous cold rolling device for metal pipes according to claim 5, characterized in that, The spray head (301) is rotatably connected to the connecting frame (102).

7. A self-paced continuous cold rolling device for metal pipes according to claim 6, characterized in that, It further includes a supercharging fan (401). The supercharging fan (401) is rotatably connected inside the oil pipeline (302). The rotating supercharging fan (401) is used to provide oil transportation power. A sliding sleeve (402) is rotatably connected to the sliding frame (111). The sliding sleeve (402) is spline-connected to the supercharging fan (401). Bevel gears (403) are fixedly connected to both the sliding sleeve (402) and the rotating shaft (1081). When the sliding sleeve (402) slides, the bevel gear (403) thereon is driven to move to engage with the bevel gear (403) on the rotating shaft (1081).

8. A self-paced continuous cold rolling device for metal pipes according to claim 7, characterized in that, It further includes a second rotating rod (501). The second rotating rod (501) is fixedly connected to the rotating shaft (1081) near the inlet side of the connecting frame (102). A second connecting rod (502) for driving the spray head (301) to swing back and forth in a pendulum manner is rotatably connected between the second rotating rod (501) and the spray head (301).

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