Seamless stainless steel pipe multistage cold rolling device

Abstract

The invention discloses a seamless stainless steel pipe multi-stage cold rolling device, and belongs to the technical field of cold rolling. The device mainly comprises a feeding base; the auxiliary discharging assembly comprises a discharging frame installed on one side of the feeding base, a housing is installed on the discharging frame, two sets of second air cylinders are installed at one end of the housing, and a pushing plate is connected between the telescopic ends of the two sets of second air cylinders; the discharging unit comprises mounting frames mounted on the two sides of the discharging frame, and a discharging cover is mounted between the two mounting frames; the buffering unit is provided with a plurality of sets of springs installed on the feeding base, and a buffering plate is installed at one end of each spring. According to the multistage cold rolling device for the seamless stainless steel pipe, the discharging frame is matched with the limiting unit so that the steel pipe can be stably placed in a matched mode, and intermittent precise discharging is achieved through a second air cylinder and a stepping motor under the control of the controller; the buffer unit buffers impact through a spring and a buffer plate, and a limiting plate prevents rolling, so that the steel pipe is prevented from being damaged.

Description

Technical Field

[0001] This application relates to the technical field of cold rolling, and specifically to a multi-stage cold rolling device for seamless stainless steel pipes. Background Art

[0002] In modern industrial production, seamless stainless steel pipes are widely used in many fields such as petroleum, chemical industry, machinery manufacturing, aerospace, etc. due to their excellent corrosion resistance, high strength, and good surface quality. With the continuous improvement of the quality and performance requirements of seamless stainless steel pipes in various industries, their production processes are also continuously improved and optimized. As one of the key links in the production of seamless stainless steel pipes, the cold rolling process plays a crucial role in improving the dimensional accuracy, surface quality, and mechanical properties of the pipes.

[0003] Common cold rolling mills include a work roll and a backup roll. The work roll directly contacts the stainless steel pipe blank, and the backup roll provides rigid support for the work roll to prevent the work roll from deflecting under the rolling force. During loading, the stainless steel pipe is manually pushed into the position of the processing groove and placed on the arc-shaped support seat, and then the stainless steel pipe is manually pushed to be sleeved on the backup roll. After multiple loading operations are completed, the motor drives the work roll to rotate at high speed. Since the linear velocity of the work roll surface is greater than the feeding speed of the blank, under the traction of friction, the blank is forcibly bitten into the roll gap to perform cold rolling operations on the stainless steel pipe. During the continuous application of pressure by the rolls, the stainless steel pipe blank undergoes plastic deformation; In the loading process, workers need to push the stainless steel pipe along the ground towards the processing groove. Since the arc-shaped support seat in the processing groove is lower than the ground, when the worker pushes the pipe to the edge of the processing groove and makes it fall onto the support seat, there is a certain friction between the pipe and the ground, which may cause scratches and other defects on the pipe surface. At the same time, dirt such as dust and sand on the ground will adhere to the pipe surface during the friction process, resulting in wear between the pipe and the work roll in the subsequent cold rolling process, affecting the product quality and reducing the corrosion resistance and service life of the pipe. Therefore, it is necessary to provide a multi-stage cold rolling device for seamless stainless steel pipes to solve the above problems.

[0004] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of this application, and therefore, it may include information that does not constitute prior art. Summary of the Invention

[0005] Based on the above problems existing in the prior art, the problem to be solved by this application is: to provide a multi-stage cold rolling device for seamless stainless steel pipes, which solves the problem that when loading, workers push the stainless steel pipe into the processing groove lower than the ground, and the friction between the pipe and the ground easily causes scratches and adheres dirt, affecting the subsequent cold rolling quality and the performance of the pipe.

[0006] The technical solution adopted by the present application to solve its technical problems is: a multi-stage cold rolling device for seamless stainless steel pipes, including a feeding base, which has a feeding groove; two sets of moving units, which are installed in the feeding groove. The moving unit includes a first lead screw with bearings installed in the feeding groove. A plurality of lead screw sleeves are threadedly connected to the first lead screw. An arc-shaped support seat is installed between the two lead screw sleeves; an auxiliary blanking component, which is installed on one side of the feeding base. The auxiliary blanking component includes a feeding rack installed on one side of the feeding base. A cover is installed on the feeding rack. Two second cylinders are installed at one end of the cover. A pushing plate is connected between the telescopic ends of the two second cylinders; a discharging unit, which is installed on both sides of the feeding rack. The discharging unit includes mounting racks installed on both sides of the feeding rack. A blanking cover is fixedly installed between the two mounting racks. The blanking cover is a hollow columnar structure. A stepping motor is installed at one end of the blanking cover. A blanking blade is installed at one end of the output end of the stepping motor. The blanking blade is composed of a central shaft and six blades arranged at equal distances along the outer diameter of the central shaft. There is a spacing between the two blades; a buffer unit, which is installed on the feeding base. The buffer unit is a plurality of springs installed on the feeding base. One end of the plurality of springs is installed with a buffer plate. The buffer plate has a certain inclination. A limiting rod is arranged at the center of the spring.

[0007] Further, a fixed round rod is installed at one end of the first lead screw. One end of the first lead screw is connected to the inner wall of one end of the feeding groove by bearing through the fixed round rod. A second driving member is installed at one end of the first lead screw. The second driving member is a motor. The second driving member is installed at one end position of the feeding base. Guide rods are installed at the upper and lower sides of the first lead screws of the two moving units in the feeding groove. Four guide rods are movably sleeved with pipe pushing seats. The pipe pushing seats are threadedly connected to the first lead screws of the two moving units.

[0008] Further, a cold rolling component is installed at one end of the feeding base. The cold rolling component includes a cold rolling box installed at one end of the feeding base. A cold rolling chamber is provided in the cold rolling box. Two slide rails are installed on the bottom surface of the inner wall of the cold rolling chamber. A first slider is slidably installed on the slide rails. A base frame is installed on the two first sliders. The base frame is concave. A first working roll is installed on the base frame by bearing. A support frame is installed on the base frame. The support frame is concave. A second working roll is installed on the support frame by bearing. There is a gap between the second working roll and the first working roll. Both the second working roll and the first working roll have roll shafts.

[0009] Further, the combination of the two sets of the screw rod sleeves and the arc-shaped support seats is defined as a supporting part. There are three groups of the supporting parts, and the three groups of the supporting parts are arranged at equal intervals on the first screw rod. The pipe pushing seat is arranged at a position close to one end in the feeding groove. The three groups of the supporting parts are defined as the first supporting part, the second supporting part, and the third supporting part. A fourth supporting part is movably sleeved between the two fixed round rods, and the fourth supporting part is installed at a position close to one end of the inner wall of the feeding groove. There is a gap between the fourth supporting part and one end of the inner wall of the feeding groove.

[0010] Further, the top surface of the feeding rack has a certain slope, and limiting units are installed on both sides of the cover shell. The limiting unit includes two limiting rods penetrating and installed on the side surface of the cover shell. The cover shell is composed of four vertical plates. One end of the two limiting rods is connected with a limiting plate. Thread grooves are formed on the limiting rods, and two nuts are threadedly connected to the limiting rods. The nuts are located on both sides of the vertical plates.

[0011] Further, a controller is arranged on the feeding rack. The controller is electrically connected to the stepping motor and the second air cylinder. Displacement sensors are equidistantly installed on the side surface of the limiting plate close to the stainless steel pipe, and the displacement sensors are electrically connected to the controller.

[0012] Further, two limiting plates are installed on the buffer plate, and two frames are installed on the feeding base. The two springs are arranged on the frames.

[0013] Further, a guide rail is installed on the surface of the frame close to the feeding groove. A second slider is slidably installed on the guide rail. A pushing block is installed between the two second sliders, and the pushing block has a support rod.

[0014] Further, a pushing unit is installed at one end of the frame. The pushing unit includes a third motor installed at one end of the frame. A second screw rod is installed at the output end of the third motor. A limiting part is installed on the bottom surface of the frame. One end of the second screw rod is in bearing connection with the limiting part. The support rod is threadedly connected to the second screw rod. The pushing block has an arc-shaped groove, and the diameter of the arc-shaped groove is the same as the inner diameter of the stainless steel pipe. The pushing block is located in the gap between the fourth supporting part and the feeding groove.

[0015] Further, a cleaning part is installed on the bottom surface of the frame. The cleaning part has an arc-shaped inner groove, and a cleaning sponge is arranged in the inner groove. The diameter of the inner groove is the same as the outer diameter of the stainless steel pipe.

[0016] The beneficial effects of the present application are as follows: A multi-stage cold rolling device for seamless stainless steel pipes provided by the present application realizes the feeding, buffering, and cleaning of stainless steel pipes through the cooperation of multiple structures: a slope is provided on the top surface of the feeding rack, and the distance between the limiting plates is adjusted in cooperation with the limiting unit to adapt to steel pipes of different lengths and stably place them; the second cylinder and the stepping motor cooperate under the control of the controller. The telescopic end of the cylinder pushes the steel pipe, and the displacement sensor monitors the position to control the start and stop. The stepping motor drives the feeding blades to rotate, and intermittent and precise feeding is achieved through the opening grooves and through grooves; the buffering unit on the feeding base consists of a spring, an inclined buffer plate, and a limiting rod, which buffers the impact force of the falling steel pipe, and the limiting plate prevents it from rolling down to avoid knocking and damage.

[0017] In addition to the objectives, features, and advantages described above, the present application has other objectives, features, and advantages. The following will refer to the drawings for a further detailed description of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings forming a part of this application are used to provide a further understanding of the application. The schematic embodiments and descriptions thereof of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings: Figure 1 is the overall schematic diagram of a multi-stage cold rolling device for seamless stainless steel pipes in the present application; Figure 2 is Figure 1 the partial structural diagram of the feeding component and the cold rolling component of Figure 3 is Figure 1 the exploded view of Figure 4 is Figure 1 the structural schematic diagram of the auxiliary feeding component of Figure 5 is Figure 4 the bottom structural schematic diagram of Figure 6 is Figure 5 the enlarged view at position A in Figure 7 is Figure 4 the enlarged view at position B in Figure 8 is Figure 3 the enlarged view at position C in Figure 9 is Figure 3 the enlarged view at position D in Among them, the reference numerals in the drawings are as follows: 1. Feeding component; 11. Feeding base; 12. Loading groove; 13. Inner support rod; 14. First lead screw; 15. Arc support seat; 16. Lead screw sleeve; 17. Pipe pushing seat; 2. Cold rolling component; 21. Cold rolling box; 22. Slide rail; 23. First slider; 24. First working roll; 25. Support frame; 26. First motor; 27. First rack; 28. Gear; 3. Auxiliary blanking component; 31. Loading rack; 32. Housing; 33. Second cylinder; 34. Limiting rod; 35. Limiting plate; 37. Nut; 38. Mounting frame; 39. Blanking cover; 310. Stepper motor; 311. Through groove; 312. Blanking blade; 313. Opening groove; 314. Buffer plate; 315. Spring; 316. Limit rod; 317. Limit plate; 318. Frame; 319. Guide rail; 320. Second slider; 321. Third motor; 322. Pushing block; 323. Support rod; 324. Second lead screw; 325. Cleaning part; 326. Pushing plate. Detailed implementation manners

[0019] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0020] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0021] Embodiment 1: As Figures 1-3 and Figure 9 shown, the present application provides a seamless stainless steel pipe multi-stage cold rolling device, including a feeding component 1, which is adapted to push a stainless steel pipe into the cold rolling device, and the feeding component 1 includes a feeding base 11, the feeding base 11 has a loading groove 12, and an inner support rod 13 is installed in the loading groove 12 by bearing, and there is a certain distance between one end of the inner support rod 13 and one end of the inner wall of the loading groove 12, and this distance is adapted to place the stainless steel pipe; And there are two sets of moving units arranged in the feeding trough 12. These two sets of moving units are arranged on both sides of the inner support rod 13. The moving unit includes a first lead screw 14 installed in the feeding trough 12 with bearings. The first lead screw 14 is a variable pitch lead screw. At the same time, a fixed round rod (not marked in the figure) is fixedly installed at one end of the first lead screw 14. One end of the first lead screw 14 is connected to the inner wall of the feeding trough 12 by bearings through the fixed round rod. A plurality of lead screw sleeves 16 are threadedly connected to the first lead screw 14. An arc-shaped support seat 15 for supporting the stainless steel pipe is fixedly installed between the two horizontally arranged lead screw sleeves 16 (reference Figure 2 ). At the same time, a second driving member (not marked in the figure) is fixedly installed at one end of the first lead screw 14. The second driving member is a motor, and the second driving member is installed at one end position of the feeding base 11; And guide rods (not marked in the figure) are fixedly installed on the upper and lower sides of the first lead screw 14 of the two sets of moving units in the feeding trough 12. A pipe pushing seat 17 is movably sleeved on the four guide rods. The pipe pushing seat 17 is threadedly connected to the first lead screw 14 of the two sets of moving units. The pipe pushing seat 17 is adapted to move along the linear direction of the guide rod as the first lead screw 14 rotates; At the same time, a cold rolling assembly 2 is installed at one end of the feeding base 11. The cold rolling assembly 2 includes a cold rolling box 21 fixedly installed at one end of the feeding base 11. The cold rolling box 21 has a cold rolling chamber. Two slide rails 22 are fixedly installed on the bottom surface of the inner wall of the cold rolling chamber. A first slider 23 is slidably installed on the slide rails 22. A base frame (not marked in the figure) is fixedly installed on the two first sliders 23. The base frame is concave. A first working roll 24 is installed on the base frame with bearings; At the same time, a support frame 25 is fixedly installed on the base frame. The support frame 25 is also concave. A second working roll (not marked in the figure) is installed on the support frame 25 with bearings. There is a gap between the second working roll and the first working roll 24. Both the second working roll and the first working roll 24 have roll shafts. The roll shaft of the second working roll penetrates through the support frame 25. The roll shaft of the first working roll 24 penetrates through the base frame. And this gap is adapted for the stainless steel pipe to pass through. A first motor 26 is fixedly installed on the side of the support frame 25. The output end of the first motor 26 is connected to one end of the second working roll; It should be noted that: the first working roll 24 and the second working roll have annular grooves for cold rolling the stainless steel pipe. The common contour of the annular groove is circular around the roll axis. And the annular groove has a slope of 1° - 10°, and the direction usually gradually decreases along the movement direction of the steel pipe, which is used to guide the direction and control the deformation amount. There are also annular grooves without slopes for uniform and stable rolling; And two sets of guiding units are installed on both sides of the inner wall of the cold rolling chamber. The guiding unit includes a first rack 27 fixedly installed on both sides of the inner wall of the cold rolling chamber. At the same time, a gear 28 is fixedly installed at one end of the roller shaft of the second working roll and the first working roll 24. The gear 28 meshes with the first rack 27. Here, the gear 28 at one end of the first working roll 24 is defined as the first gear, and the gear 28 at one end of the second working roll is defined as the second gear. At the same time, the first gear and the second gear are arranged oppositely (that is, the tooth blocks on the first gear and the second gear are arranged oppositely). At the same time, the first gear of the second working roll is arranged on the left side, and the second gear at one end of the second working roll is arranged on the right side (refer to Figure 3 ); At the same time, a first cylinder is fixedly installed at one end of the feeding base 11. The telescopic end of the first cylinder penetrates through the feeding base 11 and is connected to one end of the inner support rod 13. And a mandrel (not marked in the figure) is provided at one end of the inner support rod 13. The diameter of the mandrel is smaller than that of the inner support rod 13. Thus, in the initial state, there is a certain distance between the mandrel and one end of the inner wall of the feeding groove 12. After sleeving a plurality of stainless steel pipes on the inner support rod 13, the first cylinder is started to push one end of the mandrel into the cold rolling chamber; When cold rolling of the stainless steel pipe is required, the first motor 26 fixed on the side of the support frame 25 is started. The output end of the first motor 26 is connected to one end of the second working roll, so as to drive the second working roll to rotate.

[0022] Since there is a gap between the second working roll and the first working roll 24 and they are arranged oppositely, when the second working roll rotates, the stainless steel pipe entering the gap will drive the first working roll 24 to rotate synchronously under the action of friction. At the same time, the first working roll 24 and the second working roll are meshed with the first racks 27 on both sides of the inner wall of the cold rolling chamber through the gears 28 at one end of the roller shafts. During the rotation of the working rolls, the base frame will move on the slide rail 22 through the first slider 23. This movement cooperates with the rotation of the working rolls, enabling the working rolls to perform rolling operations along the length direction of the stainless steel pipe; It should be noted that by defining two sets of lead screw sleeves 16 and the arc-shaped support seats 15 as a supporting part, three sets of this supporting part are provided here. In the initial state, the three sets of supporting parts are arranged at equal distances on the first lead screw 14. At the same time, the pipe pushing seat 17 is arranged at a position close to one end in the feeding groove 12. And here, the three sets of supporting parts are defined as the first supporting part, the second supporting part, and the third supporting part with Figure 2 as the reference. At the same time, a fourth supporting part is movably sleeved between two sets of fixed round rods. The fourth supporting part is fixedly installed at a position close to one end of the inner wall of the feeding groove 12 (that is, at a position far from the pipe pushing seat 17 in the feeding groove 12, refer to Figure 2), and there is a gap between the fourth supporting part and one end of the inner wall of the feeding groove 12. The third supporting part and the fourth supporting part are initially adapted to support the initial feeding of the stainless steel pipe; Thus, the stainless steel pipe can be manually pushed from the ground and dropped onto the third supporting part and the fourth supporting part after passing through a certain distance between one end of the inner support rod 13 and one end of the inner wall of the feeding groove 12. At this time, the stainless steel pipe and the inner support rod 13 are in a coaxial state. Then, the stainless steel pipe is manually pushed to move on the third supporting part and the fourth supporting part so that the stainless steel pipe is sleeved on the inner support rod 13. After placing multiple groups of stainless steel pipes, one end of a group of stainless steel pipes close to the pipe pushing seat 17 contacts the side surface of the pipe pushing seat 17. Then, the second driving part is started to drive the first lead screw 14 to rotate, so as to drive the pipe pushing seat 17 to move along the linear direction of the guide rod and push the stainless steel pipe to gradually extend into the cold rolling chamber; Working principle: S1: Feeding and preparation stage Manually push the stainless steel pipe from the ground so that it passes through the gap between the inner support rod 13 and one end of the inner wall of the feeding groove 12 and falls onto the third supporting part and the fourth supporting part. At this time, the stainless steel pipe and the inner support rod 13 are coaxial. Manually push the stainless steel pipe to move on the supporting part so that it is sleeved on the inner support rod 13. Repeat the operation to place multiple groups of stainless steel pipes until one end of the steel pipe close to the pipe pushing seat 17 contacts the side surface of the pipe pushing seat 17.

[0023] Start the second driving part (motor) at one end of the feeding base 11, which drives the variable pitch first lead screw 14 to rotate. The pipe pushing seat 17 threadedly connected to the first lead screw 14 moves along the linear direction of the guide rod under the constraint of the four groups of guide rods, and pushes the stainless steel pipe to gradually move towards the cold rolling chamber. During this process, the first driving part (the motor connecting the inner support rod 13, although its start is not emphasized in this step, but the position of the steel pipe can be adjusted as needed) can drive the inner support rod 13 to rotate to assist in adjusting the position of the steel pipe.

[0024] After multiple groups of stainless steel pipes are sleeved on the inner support rod 13, the air cylinder at one end of the feeding base 11 is started to push the mandrel connected to one end of the inner support rod 13, so that one end of the mandrel extends into the cold rolling chamber and penetrates into the inside of the stainless steel pipe. The diameter of the mandrel is smaller than the diameter of the inner support rod 13, and there is a distance from one end of the inner wall of the feeding groove 12 initially, which is convenient for smoothly entering the steel pipe and prepares for supporting the inner wall of the steel pipe during cold rolling.

[0025] S2: Cold rolling processing stage The first motor 26 fixed on the side surface of the support frame 25 is started, and its output end drives the second working roll to rotate. Since the second working roll and the first working roll 24 are oppositely arranged and there is a gap for the steel pipe to pass through between them, when the stainless steel pipe entering the gap contacts the rotating second working roll, the first working roll 24 is driven to rotate synchronously under the action of friction.

[0026] The gears 28 at one end of the first working roll 24 and the second working roll shaft are engaged with the first racks 27 on both sides of the inner wall of the cold rolling chamber. During the rotation of the working rolls, this engagement relationship causes the base frame to move on the slide rail 22 through the first slider 23. The rotation and movement of the working rolls cooperate to enable the working rolls with annular grooves to roll the stainless steel pipe along its length direction. The common profile of the annular grooves on the working rolls is circular around the roll axis, and some annular grooves have a slope of 1° - 10° gradually decreasing along the movement direction of the steel pipe, which is used to guide the steel pipe and control the deformation amount; the annular grooves without slope are used for uniform and stable rolling.

[0027] Under the combined action of the pressure exerted by the annular grooves of the working rolls on the outer wall of the steel pipe and the support of the internal mandrel on the inner wall of the steel pipe, the stainless steel pipe undergoes plastic deformation at room temperature, realizing changes in dimensions such as pipe diameter and wall thickness and improvement of surface quality, thus completing cold rolling processing. As the pipe pushing seat 17 continuously pushes the steel pipe, the multi-stage cold rolling device can complete the cold rolling treatment of the entire stainless steel pipe; In this application, multiple groups of such cold rolling assemblies 2 can be arranged. Through this arrangement, multi-stage rolling operations can be carried out on the stainless steel pipe. Here, only one group of cold rolling assemblies 2 is introduced.

[0028] Embodiment 2: In order to assist in the blanking of stainless steel pipes, to reduce the problem that the way of manually pushing the stainless steel pipe to roll on the ground scratches the surface of the pipe and is prone to attaching dirt such as dust and sand grains, which affects subsequent processing; As Figures 3-6 and Figure 8 shown, an auxiliary blanking assembly 3 is provided on one side of the feeding base 11. The auxiliary blanking assembly 3 includes a discharging rack 31 installed on one side of the feeding base 11. The upper surface of the discharging rack 31 is suitable for placing the stainless steel pipe, and a housing 32 with a loop structure is fixedly installed on the discharging rack 31. And the top surface of the discharging rack 31 has a certain slope, and limiting units are installed on both sides of the housing 32. The limiting units include two groups of limiting rods 34 penetratingly installed on the side surface of the housing 32. The housing 32 is composed of four groups of vertical plates, and a limiting plate 35 is connected to one end of the two groups of limiting rods 34. Thread grooves are opened on the limiting rods 34, and two groups of nuts 37 are threadedly connected to the limiting rods 34. The nuts 37 are located on both sides of the vertical plates; The distance between the two groups of limiting plates 35 is adjustable to limit stainless steel pipes of different lengths. And two groups of second cylinders 33 are fixedly installed at one end of the housing 32. The telescopic ends of the two groups of second cylinders 33 penetrate the housing 32, and a pushing plate 326 is connected between the telescopic ends of the two groups of second cylinders 33. The pushing plate 326 is inside the housing 32, and the pushing plate 326 is suitable for linearly moving along with the telescopic ends of the second cylinders 33 to push the stainless steel pipe placed on the discharging rack 31; A discharging unit is installed at one end of the loading rack 31 close to the feeding base 11. At the same time, a limiting bar is arranged at one end of the loading rack 31 close to the discharging unit. The limiting bar is suitable for restricting the stainless steel pipe, so that under the action of the limiting bar, the stainless steel pipe will not roll down along the slope of the loading rack 31; The discharging unit includes mounting brackets 38 fixedly installed on both sides of the loading rack 31. A blanking cover 39 is fixedly installed between the two groups of mounting brackets 38. The blanking cover 39 is a hollow columnar structure. A stepping motor 310 is fixedly installed at one end of the blanking cover 39. The output end of the stepping motor 310 penetrates through the blanking cover 39. A blanking blade 312 is fixedly installed at one end of the output end of the stepping motor 310. The blanking blade 312 is composed of a central shaft and six groups of blades arranged at equal distances along the outer diameter of the central shaft. There is a spacing for storing the stainless steel pipe between the two groups of blades. And in the initial state, one group of blades is consistent with the slope of the top surface of the loading rack 31, that is, the inclination of one group of blades is the same as the surface of the loading rack 31; At the same time, a controller is equipped on the loading rack 31, and this controller is electrically connected to both the stepping motor 310 and the second cylinder 33. The user can set corresponding parameters for the controller, so that the stepping motor 310 can accurately rotate 60 degrees each time it performs a rotation action.

[0029] In actual work, the stepping motor 310 will cooperate with the second cylinder 33. Displacement sensors are installed at equal intervals on the surface of the limiting plate 35 close to the stainless steel pipe, and these displacement sensors are also electrically connected to the controller. When the operation starts, the telescopic end of the second cylinder 33 starts to move. In the initial stage, the telescopic end is in contact with the surface of a group of stainless steel pipes. When the telescopic end of the second cylinder 33 approaches the first group of displacement sensors until it is sensed by the displacement sensors, the displacement sensors will immediately capture this change and quickly transmit the signal to the controller. After receiving the signal, the controller will immediately issue an instruction to control the second cylinder 33 to stop moving.

[0030] In addition, the system also has a special setting that the distance moved by the telescopic end of the second cylinder 33 each time is twice the distance moved in the previous time. In this way, under the unified deployment of the controller, the rotation angle of the stepping motor 310 can be accurately controlled, and the moving distance and start-stop timing of the second cylinder 33 can be executed in an orderly manner, jointly ensuring the smooth progress of the entire auxiliary blanking process; After the system starts up, the controller simultaneously sends startup instructions to the stepper motor 310 and the second cylinder 33 according to a preset program. The stepper motor 310 starts to operate, rotating exactly 60 degrees each time, providing power for the rotation of the blanking blade 312, and then pushing the stainless steel pipe to gradually complete the blanking operation. At the same time, the telescopic end of the second cylinder 33 starts to move, pushing the stainless steel pipe on the blanking rack 31 towards the unloading unit.

[0031] When the telescopic end of the second cylinder 33 approaches the first group of displacement sensors during the initial movement, the displacement sensors will quickly sense this change. The displacement sensors timely transmit the detected signals to the controller. After receiving the signals, the controller will immediately issue control instructions according to the preset logic, causing the second cylinder 33 to stop moving. This step ensures that the telescopic end of the second cylinder 33 can accurately stop at the predetermined position, avoiding over-pushing or under-pushing.

[0032] After the second cylinder 33 stops for a period of time (this time can be set in the controller according to actual production requirements), the controller will send a startup instruction to the second cylinder 33 again. Since it has been set that the distance moved by the telescopic end of the second cylinder 33 each time is twice that of the previous time, the telescopic end of the second cylinder 33 will move a farther distance than the previous time this time. When it approaches the next group of displacement sensors, repeat the above process of displacement sensing, signal transmission, and stop control, and so on in a cycle to achieve the intermittent pushing of the stainless steel pipe.

[0033] During the entire working process, the stepper motor 310 continuously rotates at an angle of 60 degrees each time, cooperating with the intermittent pushing action of the second cylinder 33 on the stainless steel pipe. The stepper motor 310 drives the blanking blade 312 to rotate, gradually sending the stainless steel pipe pushed by the second cylinder 33 into the blanking cover 39 for unloading, and finally realizing the orderly blanking of the stainless steel pipe and the feeding preparation before multi-stage rolling; At the same time, opening slots 313 are provided on both sides of the blanking cover 39. These two groups of opening slots 313 are respectively suitable for the blanking and loading of the stainless steel pipe, and a through slot 311 is provided on the side of the housing 32 close to the blanking cover 39. This through slot 311 is suitable for the stainless steel pipe on the blanking rack 31 to pass through for blanking; Initially, the stainless steel pipe is placed on the sloped blanking rack 31. By rotating the nuts 37 on both sides of the vertical plate on the limiting rod 34, the position of the limiting rod 34 passing through the side of the housing 32 is adjusted, and then the limiting plate 35 is driven to move, so that the distance between the two groups of limiting plates 35 limits the length of the steel pipe, and there is a certain distance between the distance and the two ends of the stainless steel pipe to prevent the stainless steel pipe from rolling wantonly.

[0034] When unloading, the second cylinder 33 at one end of the cover 32 is started, and its telescopic end drives the push plate 326 to move linearly in the cover 32, so as to push the stainless steel pipes on the unloading rack 31 to move along the slope toward one end close to the feeding base 11, until a group of stainless steel pipes cross the limiting bar, pass through the through slot 311, and enter the unloading cover 39 through the opening slot 313, and are synchronously located between the two groups of blades at this time; The stepper motor 310 at one end of the unloading cover 39 is started, and its output end drives the unloading blade 312 to rotate, and cooperates with the second cylinder 33 to push the stainless steel pipe multiple times, so that multiple groups of stainless steel pipes are placed between the two groups of blades. As the unloading blade 312 continues to rotate, the steel pipes are sent out from another unloading opening slot 313, and the stainless steel pipes fall into the discharge slot 12; In order to buffer the falling stainless steel pipe, so as to prevent the stainless steel pipe from falling directly into the discharge trough 12 and causing surface damage, Figures 4-5 As shown, a buffer unit is installed on the feeding base 11, and the buffer unit includes multiple groups of springs 315 installed on the feeding base 11, and a buffer plate 314 is fixedly installed at one end of the multiple groups of springs 315, and the buffer plate 314 has a certain inclination. At the same time, a limit rod 316 is arranged at the center of the spring 315, and the limit rod 316 runs through the buffer plate 314, so that the stainless steel pipe falling through the discharge opening groove 313 on the unloading cover 39 falls on the buffer plate 314, and falls on the arc support seat 15 through the inclination of the surface of the buffer plate 314; At the same time, two groups of limit plates 317 are fixedly installed on the buffer plate 314, and the limit plates 317 are suitable for limiting the stainless steel pipes falling on the buffer plate 314, and two groups of frames 318 are fixedly installed on the feeding base 11, wherein two groups of springs 315 are arranged on the frames 318. It should be noted that the width of the frame 318 is slightly larger than the length of the stainless steel pipe of the present application. In the present application, the length of the stainless steel pipe can be 4 meters, and a guide rail 319 is fixedly installed on one side of the frame 318 close to the discharge trough 12, and a second slider 320 is slidably installed on the guide rail 319, and a push block 322 is fixedly installed between the two groups of second sliders 320, and the push block 322 has a bracket rod 323, and the push block 322 is connected to the two groups of second sliders 320 through two groups of bracket rods 323; At the same time, a pushing unit is installed at one end of the frame 318. The pushing unit includes a third motor 321 fixedly installed at one end of the frame 318, and a second lead screw 324 is fixedly installed at the output end of the third motor 321. At the same time, a restricting part (not marked in the figure) is fixedly installed on the bottom surface of the frame 318. One end of the second lead screw 324 is connected to the restricting part by a bearing, and the support rod 323 is threadedly connected to the second lead screw 324. It should be noted that the pushing block 322 has an arc-shaped groove, and the diameter of the arc-shaped groove is the same as the inner diameter of the stainless steel pipe. The pushing block 322 is located in the gap between the fourth supporting part and the material discharging groove 12. At the same time, a cleaning part 325 is fixedly installed on the bottom surface of the frame 318. The cleaning part 325 has an arc-shaped inner groove, and a cleaning sponge or cleaning cloth is arranged in the inner groove, and the diameter of the inner groove is the same as the outer diameter of the stainless steel pipe; The stainless steel pipes falling from the discharging opening groove 313 of the discharging cover 39 will first fall onto the inclined buffer plate 314. A plurality of springs 315 are connected below the buffer plate 314 to play a buffering role and prevent the steel pipes from directly impacting the material discharging groove 12 and causing surface abrasions. The limiting rod 316 at the center of the spring 315 penetrates through the buffer plate 314, which can prevent the buffer plate 314 from being overly offset during the buffering process and ensure its stability. Due to the inclination of the buffer plate 314, the steel pipes will slide down along the plate surface onto the arc-shaped support seat 15 after buffering. Two limiting plates 317 on the buffer plate 314 limit the position of the steel pipes during the buffering process and prevent them from rolling off the buffer plate 314.

[0035] After the stainless steel pipes fall onto the arc-shaped support seat 15, start the third motor 321 at one end of the frame 318. The output end of the third motor 321 drives the second lead screw 324 to rotate. The support rod 323 is threadedly connected to the second lead screw 324. The pushing block 322 is connected to the second slider 320 through the support rod 323, and the second slider 320 slides on the guide rail 319. As the second lead screw 324 rotates, the pushing block 322 moves on the guide rail 319. Since the pushing block 322 is located in the gap between the fourth supporting part and the material discharging groove 12, and the diameter of its arc-shaped groove is the same as the inner diameter of the stainless steel pipe, the pushing block 322 can push the stainless steel pipes on the arc-shaped support seat 15 when it moves, so that they are gradually sleeved on the inner support rod 13.

[0036] During the process of the pushing block 322 pushing the stainless steel pipes to move, the steel pipes will pass through the cleaning part 325 on the bottom surface of the frame 318. The cleaning part 325 has an arc-shaped inner groove with a diameter the same as the outer diameter of the stainless steel pipe. When the steel pipes pass through, the cleaning part 325 can clean the outer surface of the steel pipes, remove possible attached impurities, etc., ensure that the surface of the steel pipes is relatively clean before entering the material discharging groove 12 for subsequent rolling processes, and avoid impurities affecting the rolling quality.

[0037] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A multi-stage cold rolling device for seamless stainless steel pipes, characterized in that: include: A feeding base (11), wherein the feeding base (11) has a material discharge trough (12); Two groups of moving units are installed in the material discharge trough (12), and the moving units include a first screw rod (14) with a bearing installed in the material discharge trough (12), a plurality of groups of screw rod sleeves (16) are threadedly connected to the first screw rod (14), and an arc-shaped support seat (15) is installed between the two groups of the screw rod sleeves (16); An auxiliary material unloading component (3), the auxiliary material unloading component (3) is installed on one side of the feeding base (11), the auxiliary material unloading component (3) comprises a material unloading frame (31) installed on one side of the feeding base (11), a cover shell (32) is installed on the material unloading frame (31), two groups of second cylinders (33) are installed at one end of the cover shell (32), and a push plate (326) is connected between the telescopic ends of the two groups of the second cylinders (33); A discharge unit, the discharge unit is installed on both sides of the discharge rack (31), the discharge unit comprises mounting frames (38) installed on both sides of the discharge rack (31), a discharge cover (39) is fixedly installed between the two sets of mounting frames (38), the discharge cover (39) is a hollow columnar structure, a stepper motor (310) is installed at one end of the discharge cover (39), a discharge blade (312) is installed at one end of the output end of the stepper motor (310), the discharge blade (312) is composed of a central axis and six sets of blades arranged at equal distances along the outer diameter of the central axis, and there is a spacing between the two sets of blades; A buffer unit is installed on the feeding base (11), and the buffer unit is installed on multiple groups of springs (315) on the feeding base (11). A buffer plate (314) is installed at one end of the multiple groups of springs (315), and the buffer plate (314) has a certain inclination. A limit rod (316) is set at the center of the spring (315).

2. A multi-stage cold rolling device for seamless stainless steel pipe according to claim 1, characterized in that: A fixed round rod is installed at one end of the first screw rod (14), and the first screw rod (14) is connected to a bearing at one end of the inner wall of the discharge trough (12) through one end of the fixed round rod. A second driving member is installed at one end of the first screw rod (14), and the second driving member is a motor. The second driving member is installed at one end of the feeding base (11). Guide rods are installed at the upper and lower sides of the first screw rods (14) of the two groups of moving units in the discharge trough (12). The four groups of guide rods are movably sleeved with pipe push seats (17), and the pipe push seats (17) are threadedly connected to the first screw rods (14) of the two groups of moving units.

3. A multi-stage cold rolling device for seamless stainless steel pipe according to claim 2, characterized in that: A cold rolling assembly (2) is installed at one end of the feeding base (11), and the cold rolling assembly (2) comprises a cold rolling box (21) installed at one end of the feeding base (11), wherein the cold rolling box (21) has a cold rolling chamber, and two groups of slide rails (22) are installed on the bottom surface of the inner wall of the cold rolling chamber, and first sliders (23) are slidably installed on the slide rails (22), and a base frame is installed on the two groups of the first sliders (23), and the base frame is concave, and a first working roller (24) is installed on the bearing of the base frame; A support frame (25) is installed on the base frame, the support frame (25) is concave, a second working roller is installed on the support frame (25) via a bearing, a gap is provided between the second working roller and the first working roller (24), and the second working roller and the first working roller (24) both have a roller shaft.

4. A multi-stage cold rolling device for seamless stainless steel pipes according to claim 3, characterized in that: The two groups of the screw rod sleeves (16) and the arc-shaped support seat (15) form a supporting part, and three groups of the supporting parts are arranged here. The three groups of supporting parts are arranged on the first screw rod (14) at equal distances. The tube push seat (17) is arranged in a position close to one end of the discharge trough (12). The three groups of supporting parts are defined as a first supporting part, a second supporting part and a third supporting part. A fourth supporting part is movably sleeved between the two groups of fixed round rods. The fourth supporting part is installed on the inner wall of the discharge trough (12) close to one end, and there is a gap between the fourth supporting part and one end of the inner wall of the discharge trough (12).

5. The multi-stage cold rolling device for seamless stainless steel pipe according to claim 1, characterized in that: The top surface of the material discharging rack (31) has a certain slope. Limiting units are installed on both sides of the cover shell (32). The limiting units include two groups of limiting rods (34) installed through the sides of the cover shell (32). The cover shell (32) is composed of four groups of vertical plates. One end of the two groups of limiting rods (34) is connected to a limiting plate (35). The limiting rods (34) are provided with threaded grooves. Two groups of nuts (37) are threadedly connected to the limiting rods (34). The nuts (37) are located on both sides of the vertical plates.

6. A multi-stage cold rolling device for seamless stainless steel pipes according to claim 5, characterized in that: The unloading rack (31) is provided with a controller, which is electrically connected to the stepping motor (310) and the second cylinder (33). Displacement sensors are installed at equal intervals on a surface of a side of the limiting plate (35) close to the stainless steel pipe, and the displacement sensors are electrically connected to the controller.

7. A multi-stage cold rolling device for seamless stainless steel pipes according to claim 6, characterized in that: Two groups of limit plates (317) are installed on the buffer plate (314), two groups of frames (318) are installed on the feeding base (11), and two groups of springs (315) are arranged on the frames (318).

8. The multi-stage cold rolling device for seamless stainless steel pipe according to claim 7, characterized in that: A guide rail (319) is installed on one side of the frame (318) close to the material discharge trough (12), a second slider (320) is slidably installed on the guide rail (319), a push block (322) is installed between two groups of the second sliders (320), and the push block (322) has a support rod (323).

9. A multi-stage cold rolling device for seamless stainless steel pipes according to claim 8, characterized in that: A pushing unit is installed at one end of the frame (318), and the pushing unit includes a third motor (321) installed at one end of the frame (318), and a second screw rod (324) is installed at the output end of the third motor (321). A limiting portion is installed on the bottom surface of the frame (318), and one end of the second screw rod (324) is connected to the bearing of the limiting portion. The support rod (323) is threadedly connected to the second screw rod (324), and the pushing block (322) has an arc-shaped groove, and the diameter of the arc-shaped groove is consistent with the inner diameter of the stainless steel pipe. The pushing block (322) is located in the gap between the fourth supporting portion and the discharge trough (12).

10. A seamless stainless steel pipe multi-stage cold rolling device according to claim 9, characterized in that: A cleaning portion (325) is installed on the bottom surface of the frame (318). The cleaning portion (325) has an arc-shaped inner groove. A cleaning sponge is arranged in the inner groove. The diameter of the inner groove is consistent with the outer diameter of the stainless steel pipe.

Images